bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of underwater vehicle’s application in offshore oil and study on the key problems of anti-disturbance control
Authors: Geng Wenbao , Lv Xinze , Wang Lin , Wang Kejia , Xiao Xinjie 
Published: July 2021

Abstract
Underwater Vehicles are promising in offshore oil and gas development, but there are some problems. The beginning of the essay introduces the concept and classification of underwater vehicles. Then the application of underwater vehicle in offshore oil and gas is recommended. This paper briefly introduces the development status of underwater vehicle and the disadvantages of its application in offshore oil and gas engineering. The underwater vehicle needs to carry out fine detection and operation in oil and gas operation. In view of this requirement, the advantages and feasibility of anti-disturbance control in realizing high-precision control of underwater vehicle are analyzed in detail from the angle of motion control.
Research on health management technology of ship cabin equipment
Authors: Zhuo Jie , Wu Maopu , Sun Qingxin 
Published: July 2021

Abstract
The research and development of health management technology of ship cabin equipment is backward, which can’t meet the development needs of intelligent ship. In view of the current large number of ship cabin equipment and low operation and maintenance level, the study of cabin equipment system and reliability analysis are carried out with the cabin equipment as the research object, and the data of the cabin equipment are modeled by data collected and processed. The health management system of cabin equipment is developed to realize the functions of health management, such as equipment fault diagnosis and predictive maintenance, to improve the automation and intelligence level of equipment operation and maintenance.
Short review of concepts and practices in green airports in China
Authors: Sun Liang , Pan Hu , Hu Xinqiang 
Published: July 2021

Abstract
Becoming a green airport is an inevitable trend of future airport construction. In recent years much effort has been put towards developing green airports in China. This paper reviewed the evolution of the concepts of green airports, analyzed the domestic green airport projects according to the publicity material, to provide some useful suggestions for the future development of green airports in China.
Influence of upgrading natural gas quality standard on purification plant
Authors: Yang Chaoyue , Zhu Wenzhao , Li Linfeng , Li Jinjin , Wang Xianglin 
Published: July 2021

Abstract
GB17820-2018 has been formally implemented, which puts forward higher requirements for the quality index of natural gas entering the long-distance pipeline network. It is required that the H2S in the first type of natural gas should be less than 6mg/m3 and the total sulfur should be less than 20mg/m3. Because of the high content of organic sulfur in feed gas, MDEA desulfurization can not meet the standard requirements in some purification plants. At present, sulfolamine solvent desulfurization, COS hydrolysis process and molecular sieve desulfurization process are often used to remove organic sulfur. The purification plant can meet the requirements of GB 17820-2018 through solvent upgrading and new process technology. However, each of the three technologies has its own advantages and disadvantages, which should be reasonably selected according to the feed gas situation of the purification plant.
Reform and exploration of the single chip experiment practice teaching
Authors: Fan Lili 
Published: July 2021

Abstract
“The principle and application of single chip” is a very important professional course in electronic engineering, computer and control program. This paper which aimed at system bias problem in the experiment teaching course proposed the reform of the teaching mode from four aspects: experimental teaching system, teaching content, teaching method and evaluation. The students’ practical ability is effectively enhanced by combining the theory and practice and the hardware and software during the teaching process. After 5 years of teaching practice, students get a number of awards, and achieved satisfactory teaching results.
Discussion on online classroom teaching mode under the concept of active learning
Authors: Li Linbo , Wang Yanli , Wu Bing 
Published: July 2021

Abstract
The rise and development of the new engineering poses challenges to the traditional teaching mode, and the online class under epidemics conditions also faces the transformation demand of the traditional teaching mode. In the face of difficulties met with the traditional teaching model and online classes, this paper takes the online classroom teaching of the curriculum of “traffic management and control” as an example, introduces into the class the concept of active learning in the teaching model design, and makes the bold innovation practice on the traditional teaching mode from the online teaching contents, teaching methods and evaluation.
The influence of 3D printing on the education of primary and secondary school students
Authors: Chen Jimin , Cheng Lying 
Published: July 2021

Abstract
As a product of high and new technology, 3D printing is applied to the education industry, and its impact on the education of primary and secondary school students is also of great significance. In creation, students can improve their practical ability and comprehensive quality. Observing objects before modelling helps to improve their observation and concentration. In the use of software modelling, we can give full play to their imagination to build models, improve their creativity and spatial imagination, stimulate students’ enthusiasm for learning, and cultivate the habit of autonomous learning. After the completion of modelling printing, students can reflect on the problems found in time and improve them to improve their ability to think hard and solve problems. At the same time, both the modelling process and the analysis and thinking are inseparable from the mutual help of teachers and students, which also promotes the interactive learning and enhances the collective sense of honour. In the process of communication, which can promote students’ communication and learning, so that teachers and students can make progress together.
Application of Fuzzy-Taguchi theory in the optimization of teaching method and process design
Authors: Hsueh Boren , Lin Wenchieh , Huang Chouchun , Wu Bowen 
Published: July 2021

Abstract
Based on the design of the case reference teaching method, this study designs the teaching materials case through the design concept, class summary, evaluation, and teaching analysis. Innovative teaching method and course design optimization combined analysis mode with Fuzzy-Taguchi theory. The first use of the fuzzy theory system is combined with Taguchi L9 (orthogonal-table) to obtain high-precision experimental results with the smallest number of experimental designs, thereby developing the best design combination. The first paragraph describes the research motivation and instructional design concepts. The second paragraph analyzes various forms of teaching methods and their characteristics through a literature review. Third paragraph using Fuzzy-Taguchi theory to research and develop the teaching method and the analysis mode of the optimal combination of course design. Fourth paragraph summarizes the teaching practice results, including the research, practice, analysis, innovation and contribution of the promotion and reproduction of the teaching design.
Mixed teaching of design patterns based on MOOC
Authors: Chen Wenping , Meng Fanqing , Jiang Zhenfeng 
Published: July 2021

Abstract
In order to improve teaching effect of the “Java Design Patterns” course, the teaching process uses cases as the main line through the pattern concept, pattern structure diagram, pattern realization, application scenarios and the advantages and disadvantages of the pattern. This teaching method combines the orientation of application-oriented undergraduate, the characteristics of students’ knowledge structure and course’s abstract nature. In addition, this method combines traditional classrooms and MOOC platforms, and has achieved good results in actual teaching.
The exploration of PBL mixed teaching mode in secondary vocational classes
Authors: Li Guoqin , Zhang Wen , Lou Sai 
Published: July 2021

Abstract
The The large area coverage of network and the upgradation of intelligent software promote the further reform of network teaching. With the discussion of hot topics of Online teaching and Network teaching, teachers are also experiencing how to adopt appropriate teaching methods to solve the teaching problem of “being apart from each other” between teachers and students. The rise of platform technology and technical resources also promote the innovation of teaching. This paper will research on the mixed teaching mode based on PBL learning method, using platform tools to explore the practical significance of this teaching mode in secondary vocational classes, it provides a kind of thinking framework for teachers’ reference.
Logics execution in a multi-layers memristor array
Authors: Ma Desheng , Hu Yihong , Xu Nuo , Huang Chenglong , Yang Binbin , Qiu Shan , Chen Yabo , Zeng Junwei , Fang Liang 
Published: July 2021

Abstract
Memristor stateful logic based on a two-dimensional (2D) memristor crossbar array (MCBA) has been proved to be an effective approach to break the von Neumann bottleneck. But the three-dimensional (3D) array which has an inherent high storage density is less investigated in logic computation field. In this work, we implemented the whole linearly separable binary Boolean logic functions completely by using the stateful logic circuits configured in a multi-layer memristor crossbar array. This circuit primitive can execute multi-gates parallelly inside layer or the interlayer of 3D MCBA. This work provided a significant reference for the achievement of real processing in memory (PiM) in a high-density array.
Research on case virtual simulation teaching system for automobile engine based on Web 3D
Authors: Jin Shuyang , Xu Min , Chen Zhuoheng , Huang Tianle , Tan Lei , Wang Wenju 
Published: July 2021

Abstract
At present, the traditional teaching methods rely on paper teaching and specific physical equipment, which is a lack of immersion. Moreover, it is experimentally costly and the teaching effect is not good. Therefore, this paper proposes a Web 3D virtual simulation teaching system for automobile engine based on case teaching method. The system mainly includes three modules: account management, 3D virtual simulation teaching based on typical cases and document reading. Unity3D software and database technology are used to build a realistic virtual experiment scene, so that students can simulate interactive experiments online and master learning skills to achieve teaching objectives. The experimental results show that the 3D virtual simulation teaching system proposed in this paper can realize online simulation of specific interactive experiments of disassembly and assembly for automobile engine. In addition, students can learn independently, so as to achieve the purpose of immersive learning, improve teaching efficiency and reduce costs. Most importantly, it can avoid teachers and students from being hurt in the actual experiment and provide a new way for teaching.
Electromagnetic modeling of 35kV distribution transformer lightning overvoltage and its prevention method
Authors: Liu Zhenguo , Zhao Puzhi , Yang Zhushi , Wang Jie , Zhou Qipei , Cheng Tingli , Chen Zhiwei , Zhang Yingying 
Published: July 2021

Abstract
Distribution transformers are important power conversion equipment, whose safe and reliable operations affect the power supply quality of the distribution network. In order to analyze the lightning strike fault of distribution transformers, some more reasonable protection measures of transformers could be put forward. In this paper, a 35kV distribution transformer under the lightning strike is taken as the research object. Firstly, the lightning overvoltage model of the distribution transformer was established with the method of the double exponential model. Secondly, through the simulation of the distribution transformer, it was found that the electromagnetic transient distribution change dramatically, which will quickly cause the winding current flickering and form the winding overvoltage. Finally, through the voltage distribution law and the magnetic flux distortion of the transformer, it can be seen that the lightning overvoltage has a serious effect on the electromagnetic parameters of the transformer. The protection scheme is briefly analyzed, which has a guiding significance for the lightning protection design of distribution transformers.
Different proof methods of Dalton’s partial volume law equivalent to Dalton’s partial pressure law
Authors: Zhu Ping , Lu Yufa 
Published: July 2021

Abstract
As we all know, Dalton’s law of the partial pressure is equivalent to Dalton’s law of the partial volume. On the other hand, through experiments, it can be proved that Dalton’s law of the partial volume is correct, and Dalton’s law of the partial pressure can be derived from Dalton’s law of the partial volume, implying that both laws are equivalent to each other. Combined with the teaching of middle school physics and university basic physics, with different ideas and methods, this paper presents a variety of proof methods of Dalton’s law of the partial volume to be equivalent to Dalton’s law of the partial pressure. Different proof methods can improve the understanding and application of Dalton’s law of the partial pressure and law of the partial volume. It is proved that the relevant content of Dalton’s ideal gas partial pressure law is further supplemented and perfected, which plays a role throwing some light on this field.
Effects of confining layer and ablating layer on laser-induced shock wave characteristics during laser shock processing by PVDF gauge
Authors: Nie X F , Tang Y Y , Li Y , Yan L , Wu H N 
Published: July 2021

Abstract
The PVDF sensor is used to obtain the time variation curves of the shock wave pressure in the four states of the laser shock peening with or without confining layer and with or without ablating layer, the effects of confining layer and ablating layer on shock wave characteristics are analyzed. The results show that the confining layer limits the plasma expansion area, and the inverse bremsstrahlung absorption effect is enhanced, so that the peak pressure and pulse width of the shock wave are increased to 10 times and 2 times that under the condition of the without confining layer; The ablating layer significantly increases the peak pressure of the shock wave by improving the laser energy coupling efficiency. However, the influence of the ablating layer on the peak pressure tends to saturate with the increase of power density, the difference of the peak pressure is only 8.5% when the laser power density is 4.53GW/cm2. In addition, the ablating layer complicates the shock wave propagation process, and the shock wave curve presents a multi-peak structure.
Universe hypothesis of the quantum eleven-dimensional space-time
Authors: Tian X L , Li X H , Sun H 
Published: July 2021

Abstract
In order to enhance the understanding of dark matter, dark energy and the 11-dimensional space-time in M theory, this paper proposes a new 11-dimensional space-time universe hypothesis based on the balance of Yin and Yang and the axiom of universal conservation. This new hypothesis of the universe holds that Yang quantum, Yin quantum and etheric are the three basic elements that constitute the universe. There is gravity between the Yang quanta, while repulsion force exists between the Yin quanta. Matter is made of a high density of the Yang quantum, with gravitational interactions, while the Yin matter evenly distribute in the universe in a quantum form, as a result of the repulsion force. The repulsion force of Yin matter and the gravitation of matter determine the motion state of the universe. The Yin quantum and Yang quantum meet in the ether and form a high energy state of mutual pregnancy and integration, which has huge energy and forms the dark energy in the universe. Matter, Yin matter and etheric each have three-dimensional space coordinates, matter and Yin matter share a one-dimensional time coordinate, and etheric has an independent one-dimensional time coordinate, which constitutes the 11-dimensional space-time of the universe. This universe hypothesis provides a new way to understand the universe and study the phenomena of matter, dark matter and dark energy.
The H2O2treated agarose compositing with gelatin for skin repair
Authors: Tang Tianyi , Chu Bin , Cao Jialin , Tang Shunqing 
Published: July 2021

AbstractThis paper presented that the H2O2treated agarose (abbr. AG) was composited with gelatin (abbr.Gel) as gel-like polymeric mixture for skin cut repair. The low molecular weight AG was prepared by H2O2treatment for certain intervals. The time of AG gelling might be tested by scattered light turbidimeter and its mechanical properties were evaluated. The degraded AG mixing with Gel was sprayed to cover rabbit lesion site. AG/Gel mixing gel had good biocomptability and could repair rabbit skin wound without liquid exudation and bacterium infection. H&E staining results disclosed that type I collagen and other extracelluar matrix in the repaired site have same with the original skin. The degraded AG mixing with Gel gels have potential as wound dressings.
Entropy-based economic complexity of China trade flows
Authors: Du Wenli , Ren Zhuoming 
Published: July 2021

AbstractThe growing interest in the study of economic complexity has been motivated by the intrinsic features of statistical physics. Entropy is one of essential concepts in statistical physics and a particularly active concept for characterizing the complexity of a system. Motived by this, we propose a new method based on a function of the entropy to quantify economic complexity of China trade flows. We focus on regional economy activities, and collect China trade flows according to the database of national export and import items. Compared with classic economic complexity measurements including diversity and ubiquity, eigenvector-based complexity index, fitness and complexity index, Hirschman-Herfindahl index, the proposed method based on entropy can generate a proper ranking list when we take USA as a benchmark. Furthermore, the comparison of the main economic complexity statics also exposes that several of which performance moderate correlations. The stability of the ranking positions from the static evolution of the economic complexity over 8 years discloses that the index of economic complexity performs extremely sensitive depending on the eigenvector of the product network space. The results reveal that we should pay attention to the relationships between economic complexity methods when analysing the structural characteristics of economic entity activities.
Residential green space structures and mortality in an elderly prospective longitudinal cohort in China
Authors: He Qile , Liu Linxin , Chang Hao-Ting , Wu Chih-Da , Ji John S 
Published: July 2021

Abstract
Greenness is beneficial to health and is associated with lower mortality. Many studies used the normalized difference vegetation index (NDVI) to measure greenness. However, NDVI cannot be used to indicate landscape type. To go beyond NDVI, we aim to study the association between greenness structures and all-cause mortality of older adults using the 2008–2014 waves of Chinese Longitudinal Healthy Longevity Survey. We calculated landscape indices to quantify three greenspace structure characteristics: area-edge, shape, and proximity. The health outcome was all-cause mortality. We used the Cox-proportional hazards model, adjusted for the study entrant year, age, sex, activities of daily living (ADL), marital status, geographic region, urban or rural residential location, literacy, annual household income, smoking, alcohol and exercise status, biodiversity, numbers of hosts for zoonosis, contemporaneous NDVI, annual average temperature, and 3 year average PM2.5. Among 12 999 individuals (average age at baseline 87.2 years, 5502 males), we observed 7589 deaths between 2008 and 2014. We did not find a consistent dose-response relationship between greenspace structures and all-cause mortality. However, there were some signals of associations. Compared with individuals living in the lowest quartile of the number of patches, the adjusted-hazard ratio (95% CI) of those in the highest quartile was 0.85 (0.80–0.92). In stratified analyses, the largest patch index and perimeter-area ratio had protective effects on males, individuals aged <90, those free of ADL disability, and with higher income. The protective influence of greenspace structures was not as evident compared to NDVI.
Current trends in the green syntheses of tin oxide nanoparticles and their biomedical applications
Authors: Sagadevan Suresh , Lett J Anita , Fatimah Is , Lokanathan Yogeswaran , Léonard Estelle , Oh Won Chun , Hossain M A Motalib , Johan Mohd Rafie 
Published: July 2021

AbstractMetal oxide nanoparticles had found a variety of applications in numerous fields of industrial, medical, and environmental technologies, attributable to recent advances nanotechnology field. Tin oxide nanoparticles (SnO2NPs) have gained importance as metal oxide nanoparticles due to their potential in various fields, particularly nanomedicine and other biomedicine fields. Tin oxide nanoparticles can be made using a variety of biological, chemical, and physical methods. Physicochemical methods are costly, emit high levels of toxic chemicals into the atmosphere, and consume a lot of energy. On the other hand, the biological approach is an environmentally safe, cost-effective, dependable, convenient, and easy way to synthesize tin oxide nanoparticles. In this review, the bio-mediated synthesis, as well as various biomedical applications of tin oxide nanoparticles, were discussed.
Quantum logic and entanglement by neutral Rydberg atoms: methods and fidelity
Authors: Shi Xiao-Feng 
Published: July 2021

Abstract
Quantum gates and entanglement based on dipole–dipole interactions of neutral Rydberg atoms are relevant to both fundamental physics and quantum information science. The precision and robustness of the Rydberg-mediated entanglement protocols are the key factors limiting their applicability in experiments and near-future industry. There are various methods for generating entangling gates by exploring the Rydberg interactions of neutral atoms, each equipped with its own strengths and weaknesses. The basics and tricks in these protocols are reviewed, with specific attention paid to the achievable fidelity and the robustness to the technical issues and detrimental innate factors.