Beijing University Research Articles

Evaluation of Education Resources Allocation in Beijing Based on Entropy-TOPSIS Method

An entropy-TOPSIS method has been developed in order to evaluate the resources allocation in training education of higher vocational college in Beijing. In the developed method, the entropy method has been introduced into the TOPSIS framework to determine the weight of indexes of education resources allocation. The results indicate that the instruments for practical teaching from companies and the proportion of full-time teacher with bipolar teaching are the highest and least important indexes, respectively. The results of evaluation indicate a decrease in the total allocation of higher vocational colleges in Beijing from 2017 to 2019. And the highest and lowest values of closeness are 0.4247 in the year of 2017 and 0.3809 in the year of 2019, respectively. Moreover, the disparity of training education resources allocation between different higher vocational colleges in Beijing can be achieved, which could be used as a reference for improving the resources allocation and increasing the investment in training education.

Effectiveness of deep electroacupuncture with strong deqi and shallow electroacupuncture with no deqi for lumbar disk herniation: study protocol for a randomised controlled trial

IntroductionLumbar disk herniation (LDH) is a common cause of low back pain and dysfunction. Studies have shown that electroacupuncture (EA) can achieve pain relief in patients with LDH. However, there...

Sociocultural Adaptation and Program Management Strategies for International Doctoral Students of the “Confucius China Studies Program”

The purpose of this study was to understand the sociocultural adaptation status for international doctoral students of the “Confucius China Studies Program” (CCSP), as well as obtain suggestions from those students to the management of the program. This qualitative study applied an instrumental case study at a research site university in Beijing. Through distributing questionnaires to international students who participated in the program, as well as conducting one-to-one interviews with seven international students and two program management teachers, this study found that the sociocultural adaptation status of the international students of CCSP was generally high. The sociocultural adaptation status for doctoral students of the CCSP was analyzed from five aspects including interpersonal communication, academic performance, personal interest and social participation, environmental adaptation, and language proficiency. The interviewed international students proposed three suggestions to the management of the CCSP, including holding exchange and sharing activities for international doctoral students of the CCSP, compiling CCSP manual for international students of the program, and the establishment of a student writing center. This study also provides implications to administrators of the CCSP, international doctoral students, and policy-makers of this issue.

Rural-urban gap in academic performance at a highly selective Chinese university: variations and determinants

ABSTRACT Rural students’ academic performance is of critical importance for college success and later life outcomes. Prior literature on the rural-urban gap in academic performance has produced mixed results. Drawing on data from students at a highly selective university in Beijing, this study compares the differences in academic performance between students of rural and urban origins across fields of study and college years. Results demonstrate that rural students academically lag behind their urban peers in arts and humanities and STEM fields, but not in social sciences. A significant rural-urban gap in academic performance exists among first- and second-year students, but not among third- and fourth-year students. Further analyses show that in the early stage of their college career the rural-urban gap in academic performance can be largely explained by rural students’ disadvantages in family backgrounds and the type of high school attended. To some extent, these findings suggest that Chinese colleges and universities play a role in leveling the field by alleviating rural students’ disadvantages associated with family backgrounds and K-12 education.

Effects of joy and sorrow on pulse-graph parameters in healthy female college students based on emotion-evoked experiments

ObjectiveTo explore the effects of joy and sorrow on pulse-graph parameters in healthy subjects and analyze their potential effect to provide preliminary evidence that pulse diagnosis can identify human emotional changes. Design and interventionForty healthy female college students from Beijing University of Chinese Medicine were recruited. The emotion-evoking experiment was conducted to observe the effects of joy and sorrow on pulse-graph parameters, taking neutral emotion as a control. The experiment included the following criteria. (1) Emotions evoked and evaluated: the same subjects watched three emotional videos which were, respectively, neutral, joyful and sorrowful to evoke the corresponding emotions. They completed the “subjective emotion evaluation form” (SEEF) before watching each video (T0), immediately after watching the video (T1) and 15 min after watching the video (T2) to conduct subjective emotion evaluation. Simultaneously, their heart rate, galvanic skin response and heart rate variability were collected with a 16-lead physiological recorder to conduct an objective evaluation of emotional arousal. (2) Collection of pulse-graph parameters: pulse-graph parameters of the subjects at T0, T1 and T2 were collected with a pulse condition analyzer. ResultsWhen watching the joy video, the rapid ejection phase extended significantly, both the left ventricular diastole and the cardiac cycle shortened significantly. When watching the sorrow video, the left ventricular diastole extended significantly, the cardiac cycle showed an upward trend, and heart rate showed a downward trend. ConclusionJoy and sorrow have a certain effect on pulse-graph parameters of the subjects. The mechanisms may be that joy contributes to rapid ejection phase extension and a shortening of the left ventricular diastole and the cardiac cycle, while sorrow extends the left ventricular diastole. According to the theory of Traditional Chinese Medicine (TCM), the visceral functions can be mediated through human qi flow. Moderate joy and sorrow can promote, respectively, the smooth qi flow of the heart and the lung. However, excessive or long-term joy and sorrow can lead to disharmonious qi flow of the two viscera. Therefore, maintaining moderate emotions is beneficial to the physiological functions of the viscera. Great emotional fluctuations may damage the visceral functions. Future studies with effects of other emotions on pulse-graph parameters are warranted to determine the reliability of the association of emotions and pulse diagnosis.

Nutritional knowledge, attitudes and dietary behaviors of teachers and students in a medical college in Beijing and their influencing factors

To investigate nutritional knowledge, attitudes and dietary behaviors of teachers and students in a medical college in Beijing and their influencine factors, and to provide evidence for nutrition education and promotion. The subjects of this study were teachers, as well as first-year and second-year graduate students, and first-year to third-year undergraduate students. The teachers and students were respectively sampled by stratified cluster sampling with equal proportion. t-test or ANOVA was used to compare the means between the groups, and multiple linear regression was used to analyze the influencing factors of knowledge, attitude and practice (KAP) score. The average score of nutrition knowledge was 5.7±1.5. The knowledge rate of nutrition was 57.3%. The average score of nutritional attitudes was 8.3±3.0. The mean nutritional behavior score was 5.1±2.0. The average nutritional KAP score was 19.1±4.6, with the teachers 19.9±5.2 higher than the students 18.9±4.5; the female 19.5±4.5 higher than the male 18.4±4.5; All the differences were statistically significant (P < 0.05). The scores of nutritional attitudes, nutritional behavior and total KAP scores of doctoral students were significantly higher than those of the undergraduate and postgraduate students (P < 0.01). The nutrition attitudes of teachers and students is relatively correct, the nutrition knowledge needs to be further strengthened, and there are some unreasonable aspects in the nutrition behaviors. Gender, identity and degree are the main influencing factors of the nutrition score of knowledge, attitudes and behaviors. It is necessary to carry out nutritional education in schools to improve the nutrition knowledge of teachers and students, correct bad eating habits, and promote the construction of healthy China action.

The Evolution of Mathematics in Ancient China: From the newly discovered 數 Shu and 算數書 Suan Shu Shu Bamboo Texts to the Nine Chapters on the Art of Mathematics

The history of ancient Chinese mathematics and its applications has been greatly stimulated in the past few decades by remarkable archaeological discoveries of texts from the pre-Qin and later periods that make it possible to study in detail mathematical material from the time at which it was written. By examining the recent Warring States, Qin and Han bamboo mathematical texts currently being conserved and studied at Tsinghua University and Peking University in Beijing, the Yuelu Academy in Changsha, and the Hubei Museum in Wuhan, it is possible to shed new light on the history of early mathematical thought and its applications in ancient China. Also discussed here are developments of new techniques and justifications given for the problems that were a significant part of the growing mathematical corpus, and which eventually culminated in the comprehensive Nine Chapters on the Art of Mathematics. What follows is a revised text of an invited plenary lecture given during the 10th National Seminar on the History of Mathematics at UNICAMP in Campinas, SP, Brazil, on March 27, 2013.

Preface

Sincerely welcome you to 2020 2nd International Conference on Computer Modeling, Simulation and Algorithm (CMSA2020), which is supported by SERC Science and Engineering Research Center. With the progress of science and technology, the performance of computer modeling and simulation has been constantly improved, data acquisition has become more convenient and data analysis has greatly improved research efficiency. Growing researchers join in scientific research, and the increasing research interests also indicate that the prosperous period of Computer Modeling, Simulation and Algorithm research is coming.In this special period when the pneumonia epidemic still needs high attention, in order to respond to the epidemic prevention and control, and to ensure the safety of all participants to the greatest extent, CMSA2020 was conducted in the form of online cloud meeting on August 7, 2020. With meticulous arrangement of our conference staff and active cooperation of all the participants, we firmly believe that it is doomed to be a refreshing and effective mode of academic communication in the case of safety is guaranteed, from which all the participants surely benefit a lot.CMSA2020 was held through the ZOOM cloud meeting platform. Before the formal meeting, our staff set up test rooms for keynote speakers and author representatives respectively, mainly testing the video, audio, screen sharing and other operations. CMSA2020 was officially opening at 9:00am (Beijng Time) on August 7, 2020. This conference mainly adopted keynote speeches and oral presentations for academic research exchange, that is, specially invited experts gave a 40-minute keynote speech and each author gave a 10-15minute speech. After each presentation, we set a Q & A session of about 10-15 minutes, so that all authors can participate in it and get more research experience in the brainstorming.We invite Prof. Xueyan Lin and Prof. Kalyana C. Veluvolu to take part in CMSA2020 and make Keynote Speeches. Prof. Xueyan Lin from Beijing University of Posts and Telecommunications, China gave her keynote speech entitled CST Simulation and Analysis of Signal Integrity of Differential Transmission Lines. Prof. Kalyana C. Veluvolu from Kyungpook National University, South Korea made his keynote speech on Identification of Most Significant Brain Functional Networks with EEG. All participating authors also actively shared their latest academic achievements in Computational Modelling, Simulation and Its Application, Algorithm and Mathematics and related fields. This meeting was fast-paced, professional and efficient. All participants actively shared their academic achievements and extended more wonderful and interesting further researches during the Q & A session.We have authors from China, Spain, USA, Republic of Chile, Thailand, Colombia, Russia, Australia, France, Honduras, Australia, Romania and so on. We called for nearly a hundred professors with related research interests as Technical Program Committee members to maximize the quality and usability of this conference paper. We pursue high-quality academic papers by setting up strict reviewing mechanism and high standards of modification requirements all the time. According to main theme and topics, all article manuscripts are assigned to relevant experts for peer reviewing, and they mainly focus on the topic relevance, language standardization and originality. iThenticate Software matters lot in maintaining originality.According to the relevance of paper topics and on the basis of the suggestions of reviewers, CMSA2020 papers are divided into 5 sections: Computer Modeling and Simulation Technology; Applied Mathematics, Data Analysis and Data Mining; Advanced Algorithms, Analysis Model, Optimization Design and Its Application; Image Processing, Pattern Recognition and Artificial Intelligence and Communications and Intelligent Information System.On behalf of the organizing committee, I would like to express my sincere thanks to Journal of Physics: Conference Series for their accurate publication for CMSA2020 papers, involved reviewers and editors in Technical Program Committee for their time and energy in reviewing manuscripts and give professional comments. We will redouble our efforts to provide better and more perfect services for academic research and promote the development of computer modeling, simulation and algorithm. We truly hope for the future cooperation with you.CMSA2020 Organization Committees

Preface

We are glad to introduce you that the 2020 International Conference on Electrical Technology and Automatic Control (ICETAC2020) was successfully held during August 7-9, 2020 in Xi’ an, China. ICETAC2020 is to bring together innovative academics and industrial experts in the field of Electrical Technology and Automatic Control. The primary goal of the conference is to promote research and developmental activities in Electrical Technology and Automatic Control. And another goal is to promote scientific information interchange between researchers, developers, engineers, students, and practitioners working all around the world.We are greatly honored to have invited Assoc. Prof. Ning Cai from Department of Automation, Beijing University of Posts & Telecommunications to serve as our Conference Chair. The rest of the committee was composed of nearly eighty privileged scholars from different renowned universities and institutes around the globe.During the conference, the conference model was divided into three sessions, including oral presentations, keynote speeches and Q&A discussion. In the first part, some scholars, whose submissions were selected as the excellent papers, were given about 5-10 minutes to perform their oral presentations one by one. Then in the second part, keynote speakers were each allocated 30-45 minutes to hold their speeches. Our beloved Conference Chair, Assoc. Prof. Ning Cai, was also invited to present his latest research on Swarm Stability of Dynamical Networked Systems: From Consensus to Quasi Group Consensus. In addition, we had Assis. Prof. Huanyu Cheng, Dorothy Quiggle Professor in Engineering, from Engineering Science and Mechanics (ESM) and Materials Research Institute (MRI), The Pennsylvania State University, USA to present his talk Dissolvable Tattoo Electronics for Biomedicine. In the last part of the conference, all participants were invited to discuss and explore the academic issues after the presentations. The discussion was lasted for about 30-60 minutes. The conference provided a forum for discussing electrical technology and automatic control and in particular for promoting the interchange of novel ideas and the presentations of the latest developments in this field. This conference will also provide an ideal environment to develop new collaborations and meet experts on the fundamentals, applications, and products of the mentioned fields.List of Conference chairman, Organizing Committees and International Technical Program Committees are available in this pdf.

Hukou System, Horizontal, Vertical, and Full Job-Education Mismatch and Wage Progression among College Floating Population in Beijing, China

This article investigates college graduates in Beijing, China, and asks, First: Whether college graduates without local hukou are prone to educational mismatch? Second: What role does the hukou system play in the educational mismatch? And third: Whether college graduates without local hukou are willing to lower their wages in order to get a hukou? I use the Beijing College Students Panel Survey (BCSPS), and multinomial logit models and the linear regression analyses are conducted. I find that college graduates with (without) local hukou through job are more likely to be vertical and full mismatch than locals, and those who obtain a hukou through job have a higher full mismatch. After considering the educational mismatch, there is no significant difference in monthly wages between college graduates (not) having a hukou by work and locals.

Motivational strategies in Chinese language classrooms: A comparative study of novice and experienced teachers

Abstract Plenty of research in applied linguistics has confirmed that language teachers’ motivational strategies are playing a crucial role in relation to the learning motivation of their students. While previous research on motivational strategies has focused almost exclusively on teaching English as an international language (TESOL), this paper seeks to explore what motivational strategies are used by teachers of Chinese as a second language (CSL), and how their use differs between novice and experienced teachers in the Chinese cultural context in mainland China. The study was carried out in four Beijing universities with 90 novice and 85 experienced CSL teachers. The research instrument was adapted from the classical model developed by Dörnyei, Zoltán, &amp; Kata Csizér. 1998. Ten Commandments for motivating language learners: Results of an empirical study. Language Teaching Research 2(3). 203–229. Participants were asked to rate the motivational strategies in terms of their perceived importance and the frequency by which they implemented them in their teaching practices. Following this, six participants also took part in semi-structured interviews. The findings of the study reveal a significant relationship between teachers’ preferences of motivational strategies and their cultural background, teaching objectives and the teaching contexts. Results also show a remarkable difference in motivational strategies between novice and experienced teachers at both macro and individual levels. The study suggests a few interpretations of the results and several implications for CSL teacher’s professional development based on its findings.

Guest Editorial: Non‐Destructive Testing

Guest Editorial: Non‐Destructive Testing

A 2DEG back-gated graphene/AlGaN deep-ultraviolet photodetector with ultrahigh responsivity* *Project supported by the Research Innovation Fund for College Students of Beijing University of Posts and Telecommunications (Grant No. 202002046) and the National Natural Science Foundation of China (Grant No. 61804012).

A graphene/AlGaN deep-ultraviolet (UV) photodetector is presented with ultrahigh responsivity of 3.4 × 105 A/W at 261 nm incident wavelength and 149 pW light power. A gain mechanism based on electron trapping at the potential well is proposed to be responsible for the high responsivity. To optimize the trade-off between responsivity and response speed, a back-gate electrode is designed at the AlGaN/GaN two-dimensional electron gas (2DEG) area which eliminates the persistent photocurrent effect and shortens the recovery time from several hours to milliseconds. The 2DEG gate is proposed as an alternative way to apply the back gate electrode on AlGaN based devices on insulating substrates. This work sheds light on a possible way for weak deep-UV light detection.

Thermal stress reduction of GaAs epitaxial growth on V-groove patterned Si substrates* *Project supported by the National Natural Science Foundation of China (Grant Nos. 61874148, 61974141, and 61674020), the Beijing Natural Science Foundation, China (Grant No. 4192043), the State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), China (Grant No. IPOC2018ZT01), and the 111

We investigate the thermal stresses for GaAs layers grown on V-groove patterned Si substrates by the finite-element method. The results show that the thermal stress distribution near the interface in a patterned substrate is nonuniform, which is far different from that in a planar substrate. Comparing with the planar substrate, the thermal stress is significantly reduced for the GaAs layer on the patterned substrate. The effects of the width of the V-groove, the thickness, and the width of the SiO2 mask on the thermal stress are studied. It is found that the SiO2 mask and V-groove play a crucial role in the stress of the GaAs layer on Si substrate. The results indicate that when the width of V-groove is 50 nm, the width and the thickness of the SiO2 mask are both 100 nm, the GaAs layer is subjected to the minimum stress. Furthermore, Comparing with the planar substrate, the average stress of the GaAs epitaxial layer in the growth window region of the patterned substrate is reduced by 90%. These findings are useful in the optimal designing of growing high-quality GaAs films on patterned Si substrates.

Measuring graduate students’ global competence: Instrument development and an empirical study with a Chinese sample

In globalization, global competence (GC) is a crucial competence for graduate students to possess; thus, graduate education should prepare students with GC to compete globally. However, no instrument has been designed to measure graduate students' GC, and the theoretical structure of GC has not been empirically examined. To fill these gaps, first, we developed the Global Competence Scale for graduate students (GCSG) based on a three-dimensional theoretical framework (knowledge, skills, and attitudes). Second, we administered the GCSG to Chinese graduate students sampled from five universities in Beijing. Third, we examined the theoretical framework, and examined the reliability and validity of the scale. Finally, we described the Chinese graduate student sample’s GC by using the instrument. The results supported the theoretical model and provided evidence for the reliability and validity of the instrument. We also found that the sample showed higher ratings in knowledge and attitudes but lower ratings in communication skills.

Effect of electroacupuncture on glial fibrillary acidic protein and nerve growth factor in the hippocampus of rats with hyperlipidemia and middle cerebral artery thrombus.

Electroacupuncture (EA) has been shown to reduce blood lipid level and improve cerebral ischemia in rats with hyperlipemia complicated by cerebral ischemia. However, there are few studies on the results and mechanism of the effect of EA in reducing blood lipid level or promoting neural repair after stroke in hyperlipidemic subjects. In this study, EA was applied to a rat model of hyperlipidemia and middle cerebral artery thrombosis and the condition of neurons and astrocytes after hippocampal injury was assessed. Except for the normal group, rats in other groups were fed a high-fat diet throughout the whole experiment. Hyperlipidemia models were established in rats fed a high-fat diet for 6 weeks. Middle cerebral artery thrombus models were induced by pasting 50% FeCl3 filter paper on the left middle cerebral artery for 20 minutes on day 50 as the model group. EA1 group rats received EA at bilateral ST40 (Fenglong) for 7 days before the thrombosis. Rats in the EA1 and EA2 groups received EA at GV20 (Baihui) and bilateral ST40 for 14 days after model establishment. Neuronal health was assessed by hematoxylin-eosin staining in the brain. Hyperlipidemia was assessed by biochemical methods that measured total cholesterol, triglyceride, low-density lipoprotein and high-density lipoprotein in blood sera. Behavioral analysis was used to confirm the establishment of the model. Immunohistochemical methods were used to detect the expression of glial fibrillary acidic protein and nerve growth factor in the hippocampal CA1 region. The results demonstrated that, compared with the model group, blood lipid levels significantly decreased, glial fibrillary acidic protein immunoreactivity was significantly weakened and nerve growth factor immunoreactivity was significantly enhanced in the EA1 and EA2 groups. The repair effect was superior in the EA1 group than in the EA2 group. These findings confirm that EA can reduce blood lipid, inhibit glial fibrillary acidic protein expression and promote nerve growth factor expression in the hippocampal CA1 region after hyperlipidemia and middle cerebral artery thrombosis. All experimental procedures and protocols were approved by the Animal Use and Management Committee of Beijing University of Chinese Medicine, China (approval No. BUCM-3-2018022802-1002) on April 12, 2018.

Stabilization of Plutonium(V) Within a Crown Ether Inclusion Complex

Crystalline coordination complexes of actinides, especially in atypical oxidation states, are not only fundamentally important for expanding the notably limited knowledge on the bonding nature of a...

Photo-Based Monitoring of Particulate Matter in the Campus: A New Strategy for Student Health

It is imperative for the students’ future health to ensure the students in good physical levels. Recent years have witnessed the increasingly serious harm to student health caused by the continually growing concentration of Particulate Matters (PMs). Consequently, the task of preventing and controlling PM concentrations in the campus is eagerly required. A well-designed model for the monitoring of PM (as the basis for PM prevention and control) has posed a big challenge. Prior works have revealed that photo-based methods are available for the monitoring of PM. Towards validating the effectiveness of existing methods for PM monitoring in the campus, we construct a novel dataset that involves 1,500 photos collected in the Beijing University of Technology. Results confirm that stated-of-the-art methods are far from ideal for the monitoring of PM in the campus. To solve the aforesaid issue, this paper further proposes a novel photo-based PM monitoring model by using the weighted average method solved by LASSO regression to fuse the above methods’ outputs tested to infer the PM values. Results demonstrate the superiority of our proposed model as compared to state-of-the-art methods on the large-scale AQPDBJUT dataset.

THE MULTI-TECH PROTECTIVE MONITORING OF THE LION FOREST GARDEN STONY ARTIFICIAL HILLS (SUZHOU, CHINA)

Abstract. The Lion Forest Garden was originally built in 1342, during Yuan Dynasty, and became one of the most famous gardens in Suzhou. In 2000, it was inscribed in the World Heritage List as an extensive property of the Classical Gardens of Suzhou. The Lion Forest Garden is famous for its stony artificial hills covering more than 4,000 square meters, which were continually built during Yuan, Ming, and Qing Dynasty. However, as a long time passed, stony artificial hills appear damaged showing stone cracking - which could be seen in many places-, gaping, weathering, water erosion, and subsidence. Besides, a new underground line will pass through the road west to the Garden. In 2018 and 2019, the Landscape Architecture Engineering Lab of the Beijing University of Civil Engineering and Architecture collaborated with the Lion Forest Garden Administration on a research to define the strategy to monitor these stony artificial hills. Multiple technologies were used, such as 3D Scanning, Ultrasonic Testing, Side-Scan Sonar, sensors, and so forth. During the monitoring, some technologies worked well while others did not. The paper, based on the mentioned research, will discuss the strategy and technologies used in monitoring historical rockeries, describe the procedure, analyse the outcomes, and find out the reasons causing the unsuccess of some technologies.

In Memoriam: Kirk R. Smith.

In Memoriam: Kirk R. Smith.