bluuebunny/crossref_metadata_2025 huggingface dataset:
The role of agroedu-tourism program in enhancing young generation’s knowledge on urban farming: Hydroponics technique
Authors: Priyanti  , Hardiana Muhammad Ibnu , Suri Hutasuhut Dessy Atika
Published: March 2021

The low regeneration of farmers in Indonesia encourages agricultural education to the young generation. Cendekia Baznas School (SCB) develops the Agroedu-tourism program as a place to learn agriculture for the young generation. This study aims to determine the increase in knowledge of agroedu-tourism program participants on urban farming, especially hydroponics. This type of research is an evaluation research based on the knowledge gained by program participants. This research was conducted in Bogor, West Java. The sample in this study participants of the agroedu-tourism program were 46 students from SMP Nurul Ihsan, Bogor, Java. The data obtained were inputted at Ms. Excel 2010, then it was performed the normality test and paired T-test difference test using SPSS 20. The results of this study were that there was an increase in the average score of participants’ knowledge from before and after participating in agroedu-tourism activities. In addition, there are significant differences in hydroponic knowledge.
Developing student worksheet of natural science for the eighth-grade junior high school students based on critical thinking skills
Authors: Marlina Leni , Meiwandari Mutiara , Sriyanti Ida , Jauhari Jaidan
Published: March 2021

This research was aimed to develop a valid and practical Students’ Worksheet of Natural Science for junior high school students based on critical thinking skills. The development model used in this research was the Rowntree development model consisting of three steps, namely planning, development, and evaluation. The evaluation step was the formative evaluation step by Tessmer consisted of five steps, namely self-evaluation, expert review, one-to-one evaluation, small-group evaluation, and field testing. However, the field testing step was not done because the research objectives were only focused on validity and practicality. The data had been collected using walkthrough and questionnaire techniques. The results showed that the developed product was in a highly valid category based on the score of expert validations. The validation score obtained from the language expert was 4.73, the score obtained from the design expert was 4.56, and the validation score of critical thinking skills was 4.56. At the one-to-one evaluation step, the product was declared as very practical, practical, and quite practical. At the small-group evaluation step, the product was declared very practical and practical. Thus, the developed product has been valid and practical.
Standardized physics practice e-assessment instrument for senior high school
Authors: Purnomo Dian , Rosidin Undang , Herlina Kartini
Published: March 2021

COVID-19 pandemic has a major impact on the world of education. The existence of the coronavirus outbreak has hampered teaching and learning activities that usually take place face-to-face and have now turned into distance learning (online). Online learning is inseparable from an assessment, both cognitive, affective, and psychomotor. Good assessment instruments will affect the results to be achieved. This study aims to analyze the e-assessment instrument for standardized physics practice exams in senior high school. The subjects of this study were 10 high school physics teachers with the selection using purposive. This research uses mixed methods, namely research by combining two forms of research, namely qualitative and quantitative research. The questionnaire was analyzed quantitatively, while the results of the questionnaire data were explained qualitatively. For data collection, the researcher provided an online questionnaire for preliminary analysis related to the e-assessment of standardized physics practice exams in high schools in Lampung.
Effect of local microorganisms (LOM) and growing media on growth of guava (Psidium guajava L.) at nursery stage
Authors: Diana Widyastuti Raden Ajeng , Hendarto Kus , Yanfika Helvi , Listiana Indah , Mutolib Abdul , Rahmat Ali
Published: March 2021

Guava is a fruit that trade internationally. One of the problems in Indonesia is preparing the plant for a seedling. This research investigated the effect of local microorganisms and growing media on Guava’s growth at the nursery stage. The experiment was conducted from June to August 2020, at the experimental site of agriculture faculty, University of Lampung. The design used was a Complete Randomized Design (CRD) with two factors: growing media and local microorganisms (LOM). Growing media consisting of 2 types, M1: combination soil and rice husk, M2: combination soil and baglog waste. Local microorganisms consisting of 4 types, P1: local microorganisms from EM4, P2: local microorganisms from rice fermentation, P3: local microorganisms from oil palm empty bunches fermentation, P3: local microorganisms from fruit and vegetable fermentation. The results showed that the treatment combination of local microorganismss and growing media did not show the dominant pattern. Growing media combination of soil and rice husk was better than a combination of soil and baglog waste to support Guava’s growth. Local microorganisms from fruit and vegetable fermentation promote the high value on the growth of Guava.
The physical sciences in early childhood education: Theoretical frameworks, strategies and activities
Authors: Ravanis Konstantinos
Published: March 2021

This paper deals with the different theoretical frameworks used for the initiation of early childhood students to the physical sciences. We present in general four distinct frameworks as well as typical examples of their teaching approaches. The empiricist trends are mainly involved in the effort to transmit knowledge of science, connect new experiences with the children’s old experiences, and exhibit and present experiments. The theoretical and methodological framework of the second category of research and deployment activities is Piagetian genetic epistemology. Within this framework, children are offered opportunities to assimilate physical knowledge through experimentation and the manipulation of specially constructed, selected, and organized teaching materials and environments. In the socio-cognitive approach, one can classify activities that are influenced by post-Piagetian and/or by Vygotsky’s learning theories as well as by the results of research in Science Education, which in general recognize the importance and the privileged role of student’s mental representations, and of social interaction in the implementation of new cognitive operations. Finally, in the socio-cultural perspective of Vygotsky on the basis of which learning is the product of the holistic social, cultural and historical horizon of the student, the approach of concepts and phenomena of physical sciences is attempted through daily activities familiar to young children.
The correlation between physics problem-solving skill and metacognitive ability from collaboration of socratic dialogue-modeling instruction implementation
Authors: Lestari N A , Deta U A
Published: March 2021

Metacognitive ability linked to the problem-solving skill lies in the control of cognitive processes as a guide in problems solving. Problem-solving skill should be trained as a scaffolding for students. Scaffolding can be done through Socratic dialogue. Implementation of Socratic dialogue will be more effective when combined with modelling instruction. Therefore, the research had been conducted to determine the influence of Socratic dialogue in modelling instruction on physics problem-solving skill in terms of students’ metacognitive ability. This research is a quasi-experiment posttest only group design with a 2x2 factorial design. The results showed that: (1) the physics problem-solving ability of students learned by modelling instruction+socratic dialogue are higher than conventional learning, (2) there is an interaction between modelling instruction+socratic dialogue with the metacognitive ability to physics problem-solving skill, (3) the physics problem-solving skill of students with high metacognitive ability learned by modelling instruction+socratic dialogue are higher than conventional learning, (4) the physics problem-solving skill of students with low metacognitive ability learned by modelling instruction+socratic dialogue are lower than conventional learning.
Ethnoscience learning on science literacy of physics material to support environment: A meta-analysis research
Authors: Nurcahyani Dwi , Yuberti  , Irwandani  , Rahmayanti Henita , Ichsan Ilmi Zajuli , Mehadi Rahman Md.
Published: March 2021

Recently, Ethnoscience learning has become the focus of researchers in various regions. It provides a mixed-nuance of culture and science. This learning is a breakthrough in the world of education because it combines science and culture. This research aimed to identify the influence of Ethnoscience learning on students’ scientific literacy. The method employed was a meta-analysis. This data source was ten research articles obtained from the Scopus database based on specific search criteria. The analysis was done through 5 stages, namely Orientation, Conceptualization, Investigation, Discussion, and Conclusion. Based on the analysis of the research results, Ethnoscience learning significantly increased students’ scientific literacy. Therefore, Ethnoscience learning in schools is very important to improve students’ scientific literacy skills in developing science education for students in the 21st-century and to keep environment.
Bibliometric analysis of scientific literacy using VOS viewer: Analysis of science education
Authors: Effendi Denti Nanda , Irwandani  , Anggraini Welly , Jatmiko Agus , Rahmayanti Henita , Ichsan Ilmi Zajuli , Mehadi Rahman Md.
Published: March 2021

Scientific literacy is a person’s ability to use scientific knowledge and processes to understand scientific phenomena in solving problems or making decisions. The purpose of this study is to analyze scientific literacy research in the field of physics education and see its trends to find the research opportunity for further research. The results of the bibliometric analysis were used in this study. The search results from the Scopus database was extracted using the VOSviewer software. A total of 644 articles related to scientific literacy were analyzed and mapped. Based on the mapping results, 44 scientific literacy articles in education and 3 scientific literacy articles in physics were obtained. Based on these findings, it can be concluded that scientific literacy related to physics education has been rarely studied. Thus, it can be an opportunity for further researchers to conduct research related to the trends.
STEAM in environment and science education: Analysis and bibliometric mapping of the research literature (2013-2020)
Authors: Santi Kurnia , Sholeh Sofyan M. , Irwandani  , Alatas Fathiah , Rahmayanti Henita , Ichsan Ilmi Zajuli , Mehadi Rahman Md.
Published: March 2021

The suitability of the science-arts convergence is currently being actively discussed because it is important in educating students to become more creative and knowledgeable people. This type of research is a quantitative study using a bibliometric approach. This study aimed to carry out systematic mapping of research trends in the STEAM field in science education. We analyzed 30 articles from 25 leading journals from 1 January 2013 to 31 August 2020 (8 years period), the metadata obtained from the Scopus database was then analyzed and mapped using VOSviewer software. The articles were written by 91 authors related to 64 in 13 countries. South Korea is emerging as the most productive country. 91% of authors in this publication have only 1 publication 8% have 2 publications and another 1% have 3 publications. The 5 clusters have been reviewed, the keywords that appear most often and become the most researched topics, namely STEAM education, STEAM, engineering education, education computing, and students. New and less researched variables in the STEAM field are presented along with future study opportunities to be discussed.
Development of STEM-integrated physics e-module to train critical thinking skills: The perspective of preservice teachers
Authors: Handayani Elfa Sari , Yuberti  , Saregar Antomi , Wildaniati Yunita
Published: March 2021

The 21st-industrial revolution has become a hot topic to be discussed, including in the field of education. A country must be able to compete globally from the aspects of modern science and technology, one of which is through education. Education requires learning materials as a reference in the 21st-century. The purpose of this study was to develop learning media in the form of electronic modules for students on critical-thinking skills. The method used was Research and Development (R&D) with 26 students as the subjects. The research began by analyzing the needs of the physics education students of UIN Raden Intan Lampung. The results showed that the STEM-integrated physics E-Module needed to be equipped with quizzes and questions to train students’ critical-thinking skills. This research has only reached the product design stage, not yet the content and product validation stage by experts.
The synthesis of javanese bamboo charcoal for purifiying cooking oil
Authors: Suryandari Ervin Tri , Kusuma Hamdan Hadi
Published: March 2021

Synthesis of bamboo charcoal from Javanese bamboo has been carried out at a temperature of 400°C with a yield of 30.86%. The syintesis of javanes bamboo charcoal by heating proses with activated using NaCl. Activated bamboo charcoal was characterized using reference to SNI 06-3730-1995 regarding technical activated charcoal including water content, volatile content, total ash content, carbon content, iodine absorption and absorption of methylene blue. Activated bamboo charcoal also characterized its functional groups using FTIR and morphology using SEM. The activated bamboo charcoal which has the characteristics of a water content of 4.36% (w/w), an ash content of 1.28%(w/w), a vapor content of 5.28%(w/w), a carbon content of 80.08% (w/w), an iodine absorption capacity of 1146.35 mg/g and the absorption capacity of Methylene blue 421.46 mg/g which according to SNI 06-3730-95 standards concerning activated charcoal. From the FTIR result activated bamboo charcoal shows an absorption at (1500-1600) cm−1, indicating the presence of a C=O bond, the hydroxyl group which is bound O-H (3400-3500) cm−1 and CO (1300-1400) cm−1 which is capable of absorb color and free fatty acids. The morphological characteristics of activated bamboo charcoal are more porous than non-activated bamboo charcoal, thereby increasing its surface area and adsorption ability. The ability of activated bamboo charcoal in processing used cooking oil is able to reduce turbidity, color and odor, water content, acid number and peroxide number of cooking oil after the adsorption process. The result showed that the water content is 0,08% (w/w), peroxide number 5.45 mek O2/Kg, FFA 0.24 mg KOH/g which fulfills SNI 3741: 2013 Standard.
Synthesis fibrous silica from rice husk ash: its opportunities and challenges
Authors: Udaibah Wirda , Mulyatun  , Farikha Ginda Putri , Monica Tiara
Published: March 2021

Fibrous silica can be synthesized from rice husk biomass as a source of silica. However, making fibrous morphology is not easy and requires accuracy in the synthesis process. In this research, the hydrothermal method has been successfully synthesized fibrous silica. The high crystallinity KCC 1 fibrous silica structure was formed at 2 theta 31.58°; 45.28° and 56.31°. Silica spectra also appear at the specific wave number 3465.09 cm−1, 1642.95 cm−1, 1092.37 cm−1,805.60 cm−1 and 465.89 cm−1. However, the silica dendrite morphology has not been seen based on analysis by SEM. Hydrolysis of CTAB and urea and hydrolysis of SiO2 in butanol and toluene are important steps in the synthesis of this material. The unsuccessful formation of fibers on the silica surface can be caused by several things, such as the short stirring time of CTAB and urea starting materials. The use of SiO2 precursors from rice husks is not appropriate and the short stirring time of SiO2 with butanol and toluene is another cause. This opens up opportunities and challenges to develop better fibrous silica synthesis techniques.
Improving chemical literacy on reaction rate’s topic through reflective explicit inquiry-based learning
Authors: Lathifa U , Fibonacci A , Zammi M , Wibowo T
Published: March 2021

Today, students faced a disruption era. For those, students need to be prepared with digital-age literacy. Chemical literacy is one of them. This research was conduct to know the level of chemical literacy of chemistry teacher’s candidates and the effectiveness of reflective explicit inquiry-based learning (REIBL) over traditional instruction (TI) on fostering chemical literacy. The subject was a sophomore in the chemistry department. This research is using the PISA framework to analyze chemical literacy. The Instruments were Chemical Literacy Test (CLT) for investigating the context, content, and competencies. While the attitude was investigated using Chemical Literacy Questionnaire (CLQ). Before learning, the level of competencies was very low (38,89). While the context was low (49,54) and so do the content (41,67). But the attitude was good (76,22). After having REIBL, context, content, and competencies were good (72,22; 77,78; and 66,67), and attitude was excellent (80,3). The results reveal that REIBL is superior to TI on improving the dimension of context, content, and competencies. But there is no difference in attitude’s average between them.
Investigation of student’s obstruction on mathematical communication and the solution through self-correction
Authors: Mujiasih M , Tsani D F
Published: March 2021

There are numerous students who experienced difficulties in communicating spatial geometry concept in solving the problems. The ideas in explaining spatial geometry problems solving is not communicatively expressed. This study aims to investigate the obstruction of the students in communicating spatial geometry concept and find the solutions. According to the epistemological barrier, the obstruction of the mathematical communication in the student may be caused by errors experience in applying concepts, inaccuracies in completing settlement strategies, and errors in interpreting results to draw conclusions. To overcome the problems in mathematical communication, some solutions can be generated by buildup self-correction in planning, processing and concluding of the solving problems activities. Subjects with high mathematical communication obstruction can be overcome by training the ability to (1) express ideas completely, (2) draw conclusions based on similar patterns by comparing, and (3) increase accuracy in carrying out calculations through understanding the application of concepts to solve the problem. Whereas subjects with low Mathematical Communication barriers can be overcome by getting used to focusing more on the relationship between concepts in implementing the solution strategy.
Vector Base Approach Filter for One Channel Noise Removal in A Color Digital Image
Authors: Abdurrazzaq Achmad , Fakhruddin Muhammad
Published: March 2021

The digitization process can cause misinformation in the digital image. The distortion of information in a digital image is called noise, this condition causes visual damage to the image. Therefore, the damaged image needs to be repaired to enhance the image quality. In this paper, new image filtering method with vector approach is proposed. This method compares the intensity level of each pixel in every part of image. The experimental results show that the proposed method works well and restores the visual of the image as it is in the real condition. This is because the process of determining new pixel value on the proposed method considers the pixels value in image globally.
Measuring students’ conceptions of light waves: A survey in Central Java
Authors: Samsudin Achmad , Aminudin Adam Hadiana , Fratiwi Nuzulira Janeusse , Adimayuda Rizal , Faizin Mohammad Noor
Published: March 2021

Students’ conceptions an important role in achieving learning goals, especially in the concept of light waves in physics. The aim of this research is to measure students’ conceptions of light waves. This research is a survey with 519 respondents (K-11 students with an age of about 17 years old consisting of 399 females named “Mba’e” and 120 Males named “Le” calling in Central Java). The instrument used is the seven questions from MOLWI that have been developed. The research results are categorized based on six conception categories: Sound Understanding (SU); Partial Positive (PP); Partial Negative (PN); Misconception (MC); No Understanding (NU); and No Coding (NC). The results show that the concept of students in Central Java on the concept of light waves is in the category SU = 29%, PP = 3%, PN = 26%, NU = 4%, MC = 27%, and NC = 0%.
AIRDOS — open-source PIN diode airborne dosimeter
Authors: Kákona M. , Šlegl J. , Kyselová D. , Sommer M. , Kákona J. , Lužová M. , Štěpán V. , Ploc O. , Kodaira S. , Chroust J. , John D. , Ambrožová I. , Krist P.
Published: March 2021

This article introduces a new open-source dosimeter AIRDOS intended for measurements on board aircraft. In-flight measurement of a mixed radiation field is a challenging deal that requires a small low-power-consumption battery-operated lightweight device with long endurance. A new innovative electronic design with a silicon PIN diode used as a sensor is presented, including full description and manufacturing documentation. The device was verified by measurements and compared with reference dosimeters widely used in aircraft dosimetry, such as Liulin MDU and HAWK TEPC. A comparison of the measurements with a computation model CARI 7 was performed as well. All the comparisons yield positive results within known errors. The new design of the dosimeter has a very satisfactory performance in terms of battery life and does not need calibration after manufacturing or recalibration after a long time of usage.  Open-source design predetermines AIRDOS for future improvements and open-science.
Effects of maize flour substitution on the organoleptic characteristics and nutritional values of fried peanut products (Arachys hypogaea L.) applied by bokashi plus fertilizer in improved agroforestry system in Napabalano District, Muna Regency
Authors: Karimuna L , Halim  , Ansi A , Marfi W E , Asyik N , Hasanuddin L
Published: March 2021

The objective of this paper was to analyze the effects of maize flour substitution on the organoleptic characteristics and nutritional values of fried peanut products in improved agroforestry system through the use of bokashi plus fertilizer in intercropping maize and peanut. The research was arranged using randomized completely block design (RCBD) with one single factor of maize flour substitution (M), consisting of four levels: 0% (M0), 10% (M1), 20% (M2) and 30% (M3). Data on organoleptic and nutritional values of peanut products were recorded and analyzed using analyses of variances with 95 percent confidence level. The organoleptic of taste, aroma, texture, color of fried peanut products were tested covering carbohydrate, lipids, protein, ash and water contents were determined using standardized proximate analyzes. The results of research showed that the substitution of maize flour gave a significant effect on the organoleptic characteristis of fried peanut products for taste, aroma, texture, and color. The nutritional values for carbohydrate, lipids, protein, ash and crude fiber contents were commonly significant different at various doses of maize flour substitution. It was concluded that the substitution of maize flour might result in maintaining a better nutritional values of fried peanut products on 20% maize flour substitution.
Incorporation of Eco Process Pozzolan (EPP) as Partial Cement Replacement and Superplasticisers in Concrete
Authors: Kho J H
Published: March 2021

Eco Process Pozzolan (ePP) is obtained from the calcination of Spent Bleaching Earth (SBE) originating from the by-product of manufacture of edible oils. Studies have shown that ePP has cementitious properties and can be utilised as partial cement replacement in concrete. The limitations of ePP as partial cement replacement includes a decrease in concrete consistence, or workability. Superplasticisers are becoming commonly used in concreting works for increasing concrete workability; however, due to its chemical nature, may lead to possible side-reactions, especially when used with a new alternative material. This study focuses on the use of superplasticisers in concrete incorporated with ePP as partial cement replacement, and the resulting properties of the concrete. Concrete mixes include mixes using 100% ordinary Portland cement (i.e. 0% ePP), and mixes with ePP at 20% replacement level (i.e. 80% OPC), at 0.3 and 0.5 water to cement ratios. Three different types of superplasticisers were used, at various dosages in which one of them (polyethene-based) produces the best result. Slump tests and compressive strength tests were done at concrete ages of 7, 28, 56 and 91 days. The results show that utilisation of superplasticisers improved concrete workability and strength, regardless of the type of superplasticiser used, leading to easier compaction. The compressive strengths at long-term ages continually increases and were almost comparable to concrete using 100% OPC.
Effect of Microwave Power on Performance of Microwave-Assisted Spark Ignition under CO2-Diluted Condition
Authors: Zhang Xinhua , Wang Zhaowen , Wu Huimin , Liu Chaohui , Wang Zhihao , Cheng Xiaobei
Published: March 2021

To explore the application potential of microwave assisted ignition under EGR conditions, the effect of microwave peak power on MAI performance under 8% CO2 and non-diluted condition is investigated in a constant volume combustion chamber with peak power varying in 0∼1000W under equivalence 1.0 and ambient pressure 0.2 MPa. Results show that increasing the microwave peak power can strengthen the MAI enhancement, however, increasing peak power presents a linear relation in non-diluted cases indicating the thermal effect of microwave. In 8% CO2 case, it tends to be a threshold process, indicating that microwave exhibits more in chemical kinetics effect.
Research on Battery Technology of Borohydride New Hydrogen Energy Material
Authors: Fu Long
Published: March 2021

Vehicle-mounted hydrogen storage is a “bottleneck” link in promoting the large-scale commercial application of hydrogen fuel vehicles. The development of high-performance vehicle-mounted hydrogen storage material technology has become a hot spot in the current energy and materials field. In recent years, with the continuous expansion of the field of hydrogen storage materials, high-storage coordination metal hydrides represented by lithium borohydride ( LiBH
4 ) have gradually become a new research focus of hydrogen storage materials. This article summarizes the latest modification research and application of metal borohydride hydrogen storage materials from the perspectives of substitution, recombination, doping, nanostructure confinement and corresponding reaction mechanism, and puts forward the existing problems and corresponding countermeasures, and points out the future research direction.
Evaluation and correction of electricity consumption statistics based on Benford-Zipf
Authors: Yang Yongjiang
Published: March 2021

In the power system, the power consumption data are of guiding significance for the formulation of production deployment plans. However, due to various reasons, the record of electricity consumption data is often unable to be comprehensive and accurate. To solve this problem, this paper presents a method based on Benford-Zipf. Firstly, Benford’ law is used to evaluate the reliability of recorded electricity data. Then Zipf’s law is used for the data with low reliability. Finally estimate the total electricity consumption of the whole industry with the electricity data of individual enterprises. Taking the power consumption data of metal products industry in Fujian Province from 2015 to 2017 as an example, the evaluation and correction results show that the method is practical and effective.
Preparation of Fe3O4 @ CaP magnetic fiber scaffold with electrospining
Authors: Teng Yu , Zhang Jinliang , Li Yingjuan , Cai Chuanxiong , Chen Fuliang
Published: March 2021

Fe3O4@CaP magnetic fiber scaffold is prepared with electrospining by compounding ferroferric oxide nanoparticles into the calcium phosphate ceramic. The composite scaffold combines the superparamagnetism of ferroferric oxide nanoparticles and the good biocompatibility and bone tissue guidance of calcium phosphate, and has a high specific surface area and provides a suitable regeneration space for bone tissue, which is expected to be used for biomedical field.
Comprehensive Error Modeling of Four Axis Gear Machine Tool
Authors: Huang Zhidong , Gao Changwei , Wang Yiyang
Published: March 2021

The error modeling theory is studied. The configuration of the four axis gear machine tool is analyzed. Analysis and Describe of the motion of the four axis gear machine tool are investigated. The homogeneous transformation matrix of the relative static between the adjacent typical bodies is obtained and the homogeneous transformation matrix of the relative motion between the adjacent typical bodies is clarified. The comprehensive error model of four axis gear machine tool is established. The method and the integrated error model provide a theoretical basis for the machining and error analysis of complex surfaces.
Research on Power System Dispatching Automation Technology Based on Big Data
Authors: Zhang Peishuang , Geng Rui
Published: March 2021

The perfect combination of power dispatch automation system and the analysis and processing of large amounts of data in big data mining technology can meet people’s needs for knowledge; at the same time, the application of mining technology in the power dispatch automation control system realizes the accurate collection and sorting of power data, Has a broad application space and practical application significance. This article introduces the source of grid data in the dispatch automation system, discusses how to extract and analyse the big data in the dispatch automation system efficiently and safely, and provide scientific data support for the economic and stable operation of the power grid and regional planning and development.
MR and cloud-based medical information visualisation and interaction system design
Authors: Chen Hong
Published: March 2021

In this era of rapid development of information technology, the Internet and the Internet of Things (IoT) have emerged one after another, enabling the exchange of information and communication between any object and the user, which has led to the rapid development of remote-controlled robots and increased the requirements for speed and accuracy of information interaction. However, problems such as delays in data display caused by the separation of traditional medical equipment and dashboards from people, the difficulty of finding one in well-known hospitals and the inconvenience of accessing medical treatment in remote and mountainous areas are still emerging.
Research on the Construction of Smart Classroom in Vocational Colleges
Authors: Hu Huiping
Published: March 2021

The “Thirteenth Five-Year Plan for National Education Development” encourages teachers to use information technology to improve teaching levels, innovate teaching models, use flipped classrooms, mixed teaching and other methods to make good use of high-quality digital resources, and form an organic combination of online and offline learning. Promote the learning revolution through teaching reform, actively promote small class teaching, mixed teaching, and flipped classrooms, vigorously promote the construction of smart classrooms, and build a teaching model that combines online and offline.
A superior cathode of sodium-ion battery: A V2O5 nanosheets anchored on carbon nanofibers
Authors: Tian Shuang , Cai Tonghui , Wang Dandan , Kong Dongqing , Ren Hao , Xing Wei
Published: March 2021

Vanadium pentoxide (V2O5) as the cathode material has caused great concern in metal-ion batteries due to the diverse valence states of vanadium. However, structural instability and poor electrical and ionic conductivity significantly limit its application as high-efficiency electrodes. Herein, V2O5 nanosheet is directly grown on electrospun carbon nanofibers (V2O5@CNFs) by a hydrothermal method as a cathode for sodium-ion batteries. The carbon fiber skeleton can improve not only the conductivity but also buffer the volume variations of the electrodes. As the cathode of NIBs, the as-prepared V2O5@CNFs exhibits an excellent capacity of 178 mAh g−1 at 25 mA g−1 and 60 mAh g−1 at 1000 mA g−1.
Noise Source Identification for a ±800kV Converter Station Based on Beam-forming Acoustic Imaging Technology
Authors: Huang Tao , Wang Xingyao , She Kai , Cai Wei , Hao Cao
Published: March 2021

In this paper, a beam-forming acoustic imaging technology is applied to identify the spatial position and frequency characteristics of the main noise source on the key position of a ±800kV DC converter station. The test results show that the main noise sources of the AC filter field are the reactor group and the capacitor group, the noise of the reactor group has obvious peak value at 600Hz, and the noise of the capacitor group has obvious peak value at 100Hz. The main noise of DC filter field is from the reactor. The main noise source in the converter transformer area is the cooling fan array arranged outside the transformer. The maximum noise of the water cooling system is generated by the spray water on the bottom water pan of the cooling tower.
Analysis of Electrical Control System Based on Automated Captive Cleaning Equipment
Authors: Weng Yunxian , Zhao Yaping , Shi Juncheng
Published: March 2021

The paper first analyzes the composition of the cleaning device and control requirements, and envisages several scenarios about the sensor detection, drivers, operating mode and the controller selection, then determines a best one. According to the actual situation, the paper chooses the sensor, remote control, solenoid, geared motors, PLC and other electrical components for the project, gives the wiring diagram of the control system, and discusses the cleanup number set, the main control strategy, fault detection and other aspects of the design and implementation. Finally does the actual installation instructions, outlines several common issues and gives the appropriate solutions and precautions. Practice has proved that the entire electrical control system is practical and reliable, and it has obtained the desired effect.
Research on the Construction of Substation Equipment Model Library Based on BIM Three-Dimensional Modeling
Authors: Shi Zhuopeng , Wu Dongxun , Wang Yachen , Ge Aixin , Yu Guomei
Published: March 2021

Substation equipment has a large amount of heterogeneous information during its life cycle. However, when Autodesk Revit is used as the modeling software to build a BIM model of traction substation equipment, due to the limited type of model attribute parameters and parameter grouping methods, the model cannot meet the requirements. Requirements for information integration in the entire life cycle of equipment. Based on this, the thesis uses the MVC model of three-dimensional modeling platform and the technical support of synchronous calculation to propose a BIM-based substation equipment graphics calculation system. Taking the common cable trench, cover plate and foundation earthwork calculation in substation station engineering as an example, the realization method of main technology is explained.
Optimize Storage Management System of Electric Power Enterprises
Authors: Li Yan , Tu Xiaodong
Published: March 2021

In order to further improve the operation efficiency and ensure the power system more safe and stable operation of power system. Power supplies management system based on the existing electric power enterprises, this paper supplies store shelves, in-out warehouse management, management of the rolls and outbound management optimization scheme is put forward, after the improved shelves can avoid the waste of small size materials occupy large shelf phenomenon. The stacker and AGV are used to take charge of different areas of the shelves and work at the same time to improve the efficiency of in-out and stored-in operation. In the warehouse management and post-warehouse management, the positioning and tracking of single material products can be carried out. In addition to accurate quality inspection, the information of material products can be timely understood, and products can be replaced and repaired regularly to further ensure the stable operation of the power system.
Mechatronis: The Output Energy of MEMS Explosive Train
Authors: Tan Ming , Zhang Liang , Zeng Xiangtao , Xia Wen
Published: March 2021

A micron scale of microelectromechanical systems (MEMS) explosive train with applications in both space exploration and electronic control of safety airbag, the MEMS explosive train is designed to shock initiate a linear shaped charge by accelerating a thin metal plate across a small gap. This paper summarizes the experiment results of Φ0.9×0.6mm micro-charge driven different thickness flyer’s velocity by Photonic Doppler Velocimetry (PDV), compared to the calculation result of Gurney formulation, the flyer’s velocity of micro-charge driven different thickness lower than the calculation. The velocity-time variation curve and the energy variation with distance provide some information available for micro-explosive train design.
Effect of Ambient Temperature on Catenary System
Authors: Li Kunpeng , Feng Chao , Jin Shoujie , Yao Yongming , Zhou Ning
Published: March 2021

This paper investigates the effect of the ambient temperature change on the overhead catenary system (OCS). Thermal expansion/contraction of the components of the overhead catenary system (OCS) are considered. Simulation results show that the temperature stress has a much greater influence on the longitudinal positioning of the contact wire than on the horizontal and vertical positioning. When ambient temperature reduces to -60°C or rises to 60°C from design temperature of 20°C, the maximum longitudinal displacement of the positioner can reach as high as 304 mm, while the maximum horizontal and vertical displacement of the positioner is within 4 mm. The decrease of temperature leads to the increase of cable tension, and the increase of temperature leads to the decrease of cable tension. When the temperature decreases from 20°C to -60°C or rises to 60°C, the tension change rate of contact wire is less than 1%, while that of messenger wire is not more than 0.01%.
An intelligent shower chair for the elderly
Authors: Cheng Ziye , Hao Zekun
Published: March 2021

The Utility Model Discloses A self-service Shower Chair for the elderly, which is designed in accordance with the difficulties encountered by the elderly in bathing, the utility model can realize the functions of assisting the elderly to sit down and stand up, full-direction shower, back rubbing massage, articles storage and convenient carrying. The utility model has the advantages of simple structure and convenient operation, the balance arm is used to realize the space fixed position of the shower head, and the push rod is used to realize the height adjustment of the seat to assist the elderly to start work The back self-help back-rubbing mechanism uses a three-slider double-crank structure to enable the elderly to easily realize back-rubbing operation. Multiple functions, simple operation, more friendly to the elderly, to meet the physiological and psychological needs of the elderly
Effects of piezoelectric and dielectric properties of (Bi0.5Na0.5) TiO3-Ba (Ti, Zr) O3ceramics
Authors: Ding Nan , Cheng Hanxiang , Dai Qiangqin
Published: March 2021

Lead-free piezoelectric ceramics Zr and Mn-doped Ba (ZrxTi1-x) O3-0.5 mol% MnO2 (BZT100x-Mn, x=0.04, 0.045, 0.05, 0.055, 0.06 and 0.065) have been fabricated by the conventional solid-state reaction technique. The effects of Zr on the microstructure and electrical properties of the samples have been studied. The results revealed that the specimens exhibit the perovskite structure and a small amount of MnO2 can improve effectively the densification and electrical insulation of the ceramics. Because of high densification, good electrical insulation the donor-and acceptor-doping effects of MnO2, the piezoelectric and dielectric properties of ceramics are improved considerably. The ceramics shows an excellent piezoelectric strain constant d33
as 213 pC/N. A distinct positive temperature coefficient of resistance (PTCR) effect over a wide temperature range has been observed in all samples. With the addition of 0.5 mol% MnO2, the sample Ba(ZrxTi1-x)O3-0.5 mol% MnO2 with x=0.06 (BZT6-Mn) ceramics display low ρ values of 103 Ω cm at room temperature and their abrupt changes of 102-103 near Curie Temperature.
Research on IFHI prediction effect based on grey relational analysis and BP neural network
Authors: Wang Yiqi , Chen Lei
Published: March 2021

IFHI (Fire Risk Index) is a key indicator of the fire risk capability of polymer materials.[1] In view of the complexity, uncertainty and nonlinearity of IFHI prediction, this paper adopts the grey relational analysis method proposed by Deng Yulong et al to carry out dimensionality reduction analysis of parameters. Four parameters of SEA, MLR, TTI and CO yield, which are highly correlated with IFHI value, were selected to construct BP neural network prediction model. The predicted value is compared with the actual value, and the mean square error MSE =0.01308. It is proved that this model has a good prediction effect and can provide scientific basis for IFHI prediction.
Analysis of typical problems in stator core magnetization test of turbine generator
Authors: Jiang Dawei , Yu Longbin , Zhao Zijian , Wang Guanyu , Xing Yuhan , Zhang Bin , Liu Chang
Published: March 2021

The basic principle of turbogenerator stator core magnetization test is introduced, aiming at the overheated condition of stator core during magnetization test of No.1 generator in Yingkou Power Plant of Huaneng International Electric Power Co.,Ltd., the causes of hot spots in the core during the test are analyzed, the test, inspection and treatment process are introduced,after treatment,the stator core of the generator can be operated.
An Integrated Energy-saving Scheduling Framework Based on IoT
Authors: Xu Erbao , Li Yan
Published: March 2021

With the increasing demand for personalized and the accelerating pace of market competition, the production mode of manufacturing enterprises has changed from large quantities and single varieties to multiple varieties and small quantities, from push production to order-oriented pull production. With the increase of product types, the production management process of processing-assembly enterprises becomes more complex, and unreasonable production management will lead to frequent production process problems. This paper analyses and summarizes the traditional Just-in-time production (JIT) management architecture for processing-assembly enterprises, and proposes an energy-saving integrated scheduling system framework based on IoT technology, and analyses the key technologies under the integrated scheduling framework.
Practice of Excitation Room Ventilation and Cooling Modification in a Nuclear Power Plant
Authors: Zhu Guozhen , Xing Zhenni , He Fukai
Published: March 2021

Excitation equipment is critical to nuclear power plants. To ensure reliable operation of excitation equipment is very important for generation reliability. Some shortcomings appear in the excitation room ventilation and cooling system, which cause uneven temperature and hot points in the excitation room. High temperature of inlet air challenges excitation equipment. An external circulating modification is performed, which makes up the shortcomings of original ventilation and cooling system. This paper describes characteristic of excitation equipment, shortcomings of original ventilation and cooling system, modification plan and its effects.
Research on load forecasting method of large Power Grid based on Deep confidence Network
Authors: Xu Banghan , Wu Tianci , Wang Xue , Zhu Ying , Guo Nengxing , Cai Zhengying
Published: March 2021

In view of the existing electric power load forecasting models exist in the measuring precision is not high and the disadvantage of low stability, this paper puts forward a deep belief network - based extreme learning machine (Deep Belief Network – Extreme Learning Machine, DBN - ELM) of power load forecasting model. On the basis of traditional DBN, this model introduces ELM as the regression layer, and combines DBN’s advantages in feature extraction with ELM’s strong generalization ability to improve the accuracy of power load prediction. The experiment shows that compared with the traditional DBN neural network, the model can better fit the variation trend of power load data time series, and has higher prediction accuracy.
Treatment of Plastic Pollution Based on the Perspective of Internet + “Plastic ban”
Authors: Chen Caihong
Published: March 2021

Plastic pollution is everywhere. It is common to see plastic bags floating in the air, food packaging discarded on the roadside, plastic drink bottles and takeaway meal boxes. The advent of plastic products, can be said to be a major progress in science and technology, providing great convenience for people’s travel, but its harm is also gradually highlighted, and the chemical properties of microplastics are stable, can exist in the environment for a long time. Due to the random disposal of garbage, the plastic waste is not properly disposed of, coupled with the plastic itself is difficult to degrade, resulting in plastic pollution permeated to every corner of the earth, and is closely related to the quality of life of each of us. In response, China has implemented a new “ban on plastic pollution” in order to control plastic pollution. Whether it can show its implementation effect remains to be tested by time. In order to promote the effectiveness of policy implementation, and puts forward we should strengthen the business whether efforts in supervising the illegal use plastic products, using the Internet to keep a biodegradable plastic bags of counterfeit monitoring, biodegradable bags subsequent more into the garbage collection process chain, vigorously supporting the production of biodegradable plastics industry enterprises, increase the propaganda guide the implementation of the “forbidden model”, “plastic limit”, etc., more measures control plastic pollution.
Application of Nano Purification Materials in Wastewater Treatment
Authors: Wu Xiuwen , Deng Xu , Zhang Zhi
Published: March 2021

Industrial wastewater pollution is a difficult problem that a country faced in the process of industrialization. Wastewater pollution directly affects the source of drinking water flowing through cities, and affects people’s health and quality of life. This present study briefly introduced the application of new purification materials and the development of water treatment technology. Graphene materials are selected as an example to discuss the important role of nano purification materials in wastewater treatment. Our company designed a workshop wastewater pretreatment device based on nano graphene materials and applied for a patent. Tests show that the device could be applied to improve wastewater treatment effects and reduce wastewater pollution to the environment and surrounding water quality.