Research on the Development of College Student Education Based on Machine Learning ---Take the Physical Education of Yanbian University as an Example

Yu Quan,Wei-Jie Guo,Lin He,Zhe-Zhi Jin 영남수학회 2022 East Asian mathematical journal Vol.38 No.1

This paper is based on Yanbian University's physical test data, and uses statistical analysis methods to study the relationship between college students' physical test scores to promote college physical education. Firstly, using gender as categorical variables, we conduct a general analysis of students in different majors and different grades, and obtain the advantages and disadvantages of male and female college students; then we use Decision Trees and Random Forest algorithms to conduct modeling analysis to provide valuable suggestions for relevant departments of the university. the aiming of this research analyzing about the undergraduates physical test is that giving universities the targeted suggestions to improve the college graduate rate and promote the overall development of higher education, lay the foundation for achieving universal health.

소집단협동학습을 활용하는 중국어회화수업이 말하기성취에 미치는 영향

이옥전(Yuquan Li),이용남(Yongnam Lee) 전남대학교 교육문제연구소 2015 교육연구 Vol.38 No.-

본 연구의 목적은 고등학교 중국어 방과 후 수업에서 학습자 중심의 소집단 협동학습을 선택하여 고등학교 초급 중국어 말하기 학습에 적응하고 그 효과를 분석하여 현 교육현장이 가지는 외국어 학습의 제약점을 보완하고 초급 중국어 학습자들의 말하기 능력의 향상을 위한 방안을 제안하기 위함이다. 본 연구는 담양에 소재의 H고등학교 학습자들을 대상으로 하여 20차시의 실험연구를 진행되었다. 사전 말하기 사전 말하기 점수와 사후 말하기 점수를 분석하여 소집단 협동학습은 중국어 말하기 학습에 미치는 영향을 분석하고, 설문을 통해 사전･사후 학습만족도의 변화를 알아보았다. 수집된 자료는 SPSS 12.0 프로그램을 사용하여 T검증을 통해 분석하였다. 본 연구의 분석결과를 요약하면 다음과 같다. 소집단 협동학습을 실시한 결과 실험 집단과 통제 집단은 중국어 말하기 평가 결과에서 유의미한 차이를 나타내었다. 이는 일반 학습에 비해 양적인 면에서 발화의 기회가 증가하였고 질적인 면에서도 협동학습 과업 해결을 위해 의미 있는 의사소통이 활발하게 이루어졌기 때문이며, 또한 팀 점수를 높이기 위해 구성원 모두가 서로 돕고 가르쳐 주는 소집단 내의 긍정적 분위기 속에서 학습자가 보다 적극적으로 말하고 참여할 수 있는 기회가 제공되었기 때문이다. 이러한 분석결과를 통해 소집단 협동학습을 적용한 중국어 학습이 말하기 능력의 향상에 유효한 결론을 도출해 내었고 소집단 협동학습은 고등학교 중국어의 말하기 뿐 만 아니라 듣기, 읽기, 쓰기 활동에도 적용해 볼 것을 제언한다. The purpose of this study was to find out the education method of elevating Chinese speaking skill for high school Chinese learning beginner by using STAD(Student Team Achivement Divisions), that is one of the various cooperative learning tools focusing learner. For this purpose, I applied STAD to high school chinese speaking education. Then I analyzed the rusult in order to make up for defects of the present high school Chinese education. This study was excuted for Chinese learner of N high school located in Incheon for four weeks. To verify influence on Chinese speaking of STAD by comparing pre-Chinese speaking score with post-Chinse speaking score. The questionnaires was used to examine a change of pre-post Chinese learning attitude. This study using the SPSS 12.0 software which resulted frequency analysis, descriptive statistics, and t- test. To summarize, First, cooperative learning was effective between the experiment class and the comparative class in Chinese speaking improvement. It s considered that cooperative learning increased chances of speaking in a quantitative respect. also cooperative learning made the students more comunicative in a qualitative respect. Because the students actively needed to talk with each other to solve classwork. In addition, the students had to cooperate with other students for getting more higher score in a Chinese test. Second, cooperative learning was effective in Chinese learning attitude. Because the students got more confident about Chinese throughout group compensation based on individual Chinese learning improvement contribution. Third, the student could study more efficiently by exchanging information regarding Chinese with their friends in a basic group. besides, cooperative learning was effective for every level s Chinese learner. In particular, the student in the upper level made a progress of cognitive elaboration and the low level student could reflect on virtues and faults of high level student s learning methods by watching them. This study concluded that cooperative learning in academic achievement and learning attitude of Chinese speaking in high school education was effective as the results showed. I suggest that cooperative learning applied not only Chinese speaking but also listening, writing, reading.

Comparative Experiments to Assess the Effects of Accumulator Nitrogen Injection on Passive Core Cooling During Small Break LOCA

Li Yuquan,Hao Botao,Zhong Jia,Wang Nan 한국원자력학회 2017 Nuclear Engineering and Technology Vol.49 No.1

The accumulator is a passive safety injection device for emergency core cooling systems. As an important safety feature for providing a high-speed injection flow to the core by compressed nitrogen gas pressure during a loss-of-coolant accident (LOCA), the accumulator injects its precharged nitrogen into the system after its coolant has been emptied. Attention has been drawn to the possible negative effects caused by such a nitrogen injection in passive safety nuclear power plants. Although some experimental work on the nitrogen injection has been done, there have been no comparative tests in which the effects on the system responses and the core safety have been clearly assessed. In this study, a new thermal hydraulic integral test facilitydthe advanced core-cooling mechanism experiment (ACME)dwas designed and constructed to support the CAP1400 safety review. The ACME test facility was used to study the nitrogen injection effects on the system responses to the small break loss-of-coolant accident LOCA (SBLOCA) transient. Two comparison test groupsda 2-inch cold leg break and a double-ended direct-vessel-injection (DEDVI) line breakdwere conducted. Each group consists of a nitrogen injection test and a nitrogen isolation comparison test with the same break conditions. To assess the nitrogen injection effects, the experimental data that are representative of the system responses and the core safety were compared and analyzed. The results of the comparison show that the effects of nitrogen injection on system responses and core safety are significantly different between the 2-inch and DEDVI breaks. The mechanisms of the different effects on the transient were also investigated. The amount of nitrogen injected, along with its heat absorption, was likewise evaluated in order to assess its effect on the system depressurization process. The results of the comparison and analyses in this study are important for recognizing and understanding the potential negative effects on the passive core cooling performance caused by nitrogen injection during the SBLOCA transient.

Effects of subsequent curing on chloride resistance and microstructure of steam-cured mortar

Hu, Yuquan,Hu, Shaowei,Yang, Bokai,Wang, Siyao Techno-Press 2020 Advances in concrete construction Vol.9 No.5

The influence of subsequent curing on the performance of fly ash contained mortar under steam curing was studied. Mortar samples incorporated with different content (0%, 20%, 50% and 70%) of Class F fly ash under five typical subsequent curing conditions, including standard curing (ZS), water curing(ZW) under 25℃, oven-dry curing (ZD) under 60℃, frozen curing (ZF) under -10℃, and nature curing (ZN) exposed to outdoor environment were implemented. The unsteady chloride diffusion coefficient was measured by rapid chloride migration test (RCM) to analyze the influence of subsequent curing condition on the resistance to chloride penetration of fly ash contained mortar under steam curing. The compressive strength was measured to analyze the mechanical properties. Furthermore, the open porosity, mercury intrusion porosimetry (MIP), x-ray diffraction (XRD) and thermogravimetric analysis (TGA) were examined to investigate the pore characteristics and phase composition of mortar. The results indicate that the resistance to chloride ingress and compressive strength of steam-cured mortar decline with the increase of fly ash incorporated, regardless of the subsequent curing condition. Compared to ZS, ZD and ZF lead to poor resistance to chloride penetration, while ZW and ZN show better performance. Interestingly, under different fly ash contents, the declining order of compressive strength remains ZS>ZW>ZN>ZD>ZF. When the fly ash content is blow 50%, the open porosity grows with increase of fly ash, regardless of the curing conditions are diverse. However, if the replacement amount of fly ash exceeds a certain high proportion (70%), the value of open porosity tends to decrease. Moreover, the main phase composition of the mortar hydration products is similar under different curing conditions, but the declining order of the C-S-H gels and ettringite content is ZS>ZD>ZF. The addition of fly ash could increase the amount of harmless pores at early age.

Cryptographic Analysis and Improvement of the Structured Multi-Signature Scheme for P2P E-Services

JiYi Wu,Yuquan Zhang,Jun Zhang,WenJuan Li 보안공학연구지원센터 2014 International Journal of Security and Its Applicat Vol.8 No.3

Simulation and experimental test of load-sharing behavior of planetary gear train with flexible ring gear

Haodong Ge,Yunbo Shen,Yuquan Zhu,Yingzhao Xiong,Bing Yuan,Zongde Fang 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.11

For simulation and calculation of load-sharing behavior of planetary gear train by using the lumped mass method, an exact computational model of time-varying meshing stiffness of inner gear meshing pair with thin-walled sleeve was needed. Therefore, based on analysis of the flexible ring gear structure with thin-walled sleeve, an accurately model is proposed to obtain the time-varying internal meshing stiffness. Then, according to Newton's second law, a group of parametric differential equations of planetary gear system were derived, with which the load-sharing coefficient of the system was obtained. The load-sharing behavior experimental for the planetary gear train with five planetary gears and with flexible ring gear was designed, while the arrangement of the strain gauge was investigated and the test was performed under different working conditions. The test results show that the error of load sharing coefficient calculated by theory and experiment is less than 5 %.

Degrees of Freedom of 3-user MIMO Interference Channels with Instantaneous Relay Using Interference Alignment

( Wang Qiang ),( Shu Yuquan ),( Dong Minhua ),( Xu Ji ),( Tao Xiaofeng ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.5

Instantaneous relay (relay-without-delay) using interference alignment is a promising approach to neutralizing interference and improving system capacity. In Wang Chenwei`s work, a 2-user scenario required both source and relay to access the global channel state information (CSI). This paper shows a new method of interference alignment improves the degrees of freedom (DoF) prominently for the 3-user MIMO interference channel with instantaneous relay. This new method is focused on the relay node that completes the alignment interference neutralization so the global CSI is obtained only once and the pressure on the base station can be mitigated. In addition, the 3-user MIMO interference channels with instantaneous relay can achieve 2M DoF when source and destination have M antennas, respectively. This method shows 33% improvement over the conventional method using interference alignment which obtains 3M/2 DoF.

Maritime Transport Network Analysis: A Critical Review of Analytical Methods and Applications

Maneerat Kanrak,Hong-Oanh NGUYEN,Yuquan Du 인하대학교 정석물류통상연구원 2019 JOURNAL OF INTERNATIONAL LOGISTICS AND TRADE Vol.17 No.4

This paper presents a critical review of the economic network analysis methods and their applications to maritime transport. A network can be presented in terms of its structure, topology, characteristics as well as the connectivity with different measures such as density, degree distribution, centrality (degree, betweenness, closeness, eigenvector and strength), clustering coefficient, average shortest path length and assortative. Various models such as the random graph model, block model, and ERGM can be used to analyse and explore the formation of a network and interaction between nodes. The review of the existing theories and models has found that, while these models are rather computationally intensive, they are based on some rather restrictive assumption on network formation and relationship between ports in the network at the local and global levels that require further investigation. Based on the review, a conceptual framework for maritime transport network research is developed, and the applications for future research are also discussed.

직접 주사방식을 이용한 평면형 사각 스파이럴 인덕터의 제작

김민경(M. K. Kim),Bai Yuquan,이상욱(S. W. Lee),이인환(I. H. Lee),조해용(H. Y. Cho) 한국기계가공학회 2014 한국기계가공학회 춘추계학술대회 논문집 Vol.2014 No.4

The Evaluation Distribution of Runoff Value on Hydroelectric Potential Change-Based RCPs Scenarios and Soft-Computing: A Case Study

Jin Ge,Hong Rongjing,Lu Yuquan,Gholinia Fatemeh 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.4

Severe climate change, caused by the rise of industry and human activities, is one of the world's major issues affecting energy-generating resources. Anticipating hydropower potential is essential for developing, managing, and operating an optimal hydropower plant. The hydropower potential over the next 20 years is estimated in this study based on climate change. In addition, a novel approach for more accurate runoff estimation has been developed in this work, based on the direct influence of runoff on hydropower potential. The Modified Aquila Optimizer (MAO) algorithm was used to optimize this Deep Learning Neural Network (DLNN) model. The runoff is expected to decrease in the following years, according to the improved model's simulation. The rate of change of hydropower potential will fluctuate from a minimum of around − 112.4 MW to a high of about − 171.23 MW, according to predictive potential predictions. Rising temperatures and reduced rainfall in the following years will cause these negative changes in hydropower capacity.