The twenty years history of Journal of Southeast University (English Edition) and its significant achievements are briefly reviewed. Based on the experiences accumulated over its twenty years, some suggestions for imp...The twenty years history of Journal of Southeast University (English Edition) and its significant achievements are briefly reviewed. Based on the experiences accumulated over its twenty years, some suggestions for improving the quality of this English-language academic journal are proposed, including focusing on the report of the excellent disciplines of its sponsoring university, attracting high-level papers by giving the priority of publication, publishing special issues for experts and scholars at home and abroad, shortening publication period, and realizing the internationalization of the members of the editorial committee, etc.展开更多
Based on the data collected from the questionnaires, this paper discusses various problems concerning intercultural communication competence the non-English majors at ＂high-leveled, applicationoriented＂ level faced ...Based on the data collected from the questionnaires, this paper discusses various problems concerning intercultural communication competence the non-English majors at ＂high-leveled, applicationoriented＂ level faced in Shanghai Institute of Technology. Besides, it analyzes the necessity and feasibility in developing intercultural communication competence, and puts forward some constructive suggestions to enhance intercultural communication competence in adult English teaching.展开更多
Three- and four-bucket offshore wind power foundations with a new form of force-transferring structure are proposed in this paper, and the integrated finite element model of foundation-soil-transition structure is est...Three- and four-bucket offshore wind power foundations with a new form of force-transferring structure are proposed in this paper, and the integrated finite element model of foundation-soil-transition structure is established by using ABAQUS. The carrying capacity of the proposed foundations is studied under vertical load, horizontal load and bending moment. It can be seen that the vertical bearing capacity of multi-bucket foundation can be roughly estimated by the vertical bearing capacity of single-bucket; the horizontal bearing capacity of the three-bucket foundation scheme is controlled by displacement, while that of the four-bucket foundation scheme is controlled by the internal forces of soils. Moreover, the carrying capacity is provided by the overall structure formed by multi-bucket before soil failure. Compared with the conventional single-bucket foundation, there are mainly tension and pressure that are applied to the multi-bucket foundation, so that the carrying capacity of the foundation can be fully utilized. The probability of soil failure can be well reduced with the proposed multi-bucket foundation, and the stress transmission of force-transferring structure is more consistent through steel beams with variable cross-section.展开更多
Based on wavelet packet transformation(WPT), genetic algorithm(GA), back propagation neural network(BPNN)and support vector machine(SVM), a fault diagnosis method of diesel engine valve clearance is presented. With po...Based on wavelet packet transformation(WPT), genetic algorithm(GA), back propagation neural network(BPNN)and support vector machine(SVM), a fault diagnosis method of diesel engine valve clearance is presented. With power spectral density analysis, the characteristic frequency related to the engine running conditions can be extracted from vibration signals. The biggest singular values(BSV)of wavelet coefficients and root mean square(RMS)values of vibration in characteristic frequency sub-bands are extracted at the end of third level decomposition of vibration signals, and they are used as input vectors of BPNN or SVM. To avoid being trapped in local minima, GA is adopted. The normal and fault vibration signals measured in different valve clearance conditions are analyzed. BPNN, GA back propagation neural network(GA-BPNN), SVM and GA-SVM are applied to the training and testing for the extraction of different features, and the classification accuracies and training time are compared to determine the optimum fault classifier and feature selection. Experimental results demonstrate that the proposed features and classification algorithms give classification accuracy of 100%.展开更多
Purpose： The purpose of the study was to examine the psychometric properties of the Chinese-translated Behavioral Regulation in Exercise Questionnaire-2 （C-BREQ-2） among Chinese university students from the Mainlan...Purpose： The purpose of the study was to examine the psychometric properties of the Chinese-translated Behavioral Regulation in Exercise Questionnaire-2 （C-BREQ-2） among Chinese university students from the Mainland and Hong Kong of China. Methods： University students from the Mainland （n = 191） and Hong Kong （n=194） of China participated in this study. Factorial validity, discriminant validity, nomological validity, internal reliability, and measurement invariance across sample of the C-BREQ-2 were examined. Results： Confirmatory factor analysis provided support for the factorial validity of the 18-item, 5-factor structure C-BREQ-2. Examination of the 95% confidence interval of the inter-factor correlations suggested that the C-BREQ-2 assesses related but distinct constructs, which provided support for its discriminant validity. The internal consistency reliability of the C-BREQ-2 was found acceptable. Examination of the pattern of inter-factor correlations between different regulations suggested that a simplex-like pattern was displayed, which provided evidence for the nomological validity of C-BREQ-2. The results from multi-group confirmatory factor analysis suggested that the factor loadings and variances/ covariances of the C-BREQ-2 measurement model were invariant across the Chinese university students in the Mainland and Hong Kong of China. Conclusion： The current study provided further psychometric evidence for the C-BREQ-2, which makes the further application and research of self-determination theory （SDT） based motivation in relation to exercise and physical activity in the Mainland of China context possible.展开更多
The quaternion coherence problem exists in the data model of the conventional dimensional reduced quaternion estimation of signal parameters via rotational invariance techniques(DRQ-ESPRIT), and DRQ-ESPRIT would lose ...The quaternion coherence problem exists in the data model of the conventional dimensional reduced quaternion estimation of signal parameters via rotational invariance techniques(DRQ-ESPRIT), and DRQ-ESPRIT would lose degrees of freedom(DOFs)when it is used to implement the spatial smooth operation. An improved DRQ-ESPRIT algorithm based on 2-level nested vector-sensor array is proposed in this paper. The quaternion coherence problem is solved by switching the multiplication sequence of spatial direction vector and electric field. Meanwhile, nested array and Khatri-Rao subspace approach are used to increase the number of DOFs, thus the proposed algorithm can estimate more incident sources than DRQ-ESPRIT, and the estimations of direction of arrival(DOA)and polarization parameters are more accurate. Simulation results demonstrate the effectiveness of the proposed algorithm.展开更多
To conform to the college English teaching reform from English for General Purposes (EGP) to English for Academic Purposes (EAP) in the vital transfer era, the Foreign Language Department of Second Military Medical Un...To conform to the college English teaching reform from English for General Purposes (EGP) to English for Academic Purposes (EAP) in the vital transfer era, the Foreign Language Department of Second Military Medical University (SMMU) launched an English for Medical Academic Purpose (EMAP) curriculum with English Forum on Medical Humanities (EFMH), a project-based teaching practice. Based on Rogers' learner-centered humanistic teaching approach which emphasizes students' involvement and experiences in learning, EFMH puts students and their practice in a central place. After four-year exploration and operation, the Forum has developed from a small-scaled embryo into an internationalized, standardized and professionalized event, having produced fruitful outcomes. It is expected that the success of EFMH will provide inspiring experiences and enlightenments for higher medical education in terms of academic English teaching and teachers' responsibilities to foster high-quality medical students.展开更多
The current study investigates a group of Chinese undergraduates’perceptions of Chinese culture.It examines the discourses that the students drew on to assign meaning to Chinese culture and how the students used thes...The current study investigates a group of Chinese undergraduates’perceptions of Chinese culture.It examines the discourses that the students drew on to assign meaning to Chinese culture and how the students used these discourses in constructing their Chinese cultural identity.A qualitative study was conducted collecting written self-reflective reports on critical intercultural incidents from 39 Chinese undergraduates at a university in Beijing.Questions designed to evoke reports from the students had them describe incidents in their past intercultural experiences that made them acutely aware of themselves“being Chinese”and specify aspects of Chinese culture that they felt such awareness could be attributed to.A discourse analysis reveals the multiplicity and contextuality of the students’notions of Chinese culture.The findings raise important considerations for contemporary Chinese undergraduates’cultural identity and their much debated“identity crisis.”展开更多
Combining lubrication theory and CFD technology, a finite element model is established to simulate the rain-wind-induced vibration(RWIV). Based on Spalart-Allmaras(S-A)turbulence type, COMSOL software is adopted to ca...Combining lubrication theory and CFD technology, a finite element model is established to simulate the rain-wind-induced vibration(RWIV). Based on Spalart-Allmaras(S-A)turbulence type, COMSOL software is adopted to calculate the wind pressure coefficient and wind friction coefficient that vary with the location and time. To verify the veracity and rationality of this method, the formation and evolution of rivulets at different wind speeds are studied and compared with the existing experimental results. Furthermore, the time, location, height and width of the initial formation of rivulets are analyzed at different wind speeds, cable inclination angles and wind yaw angles. The results show that the three influencing factors mentioned above have great effect on the formation of rivulet, and the influencing tendency, range and degree are different from each other.展开更多
A real-time monitoring and 3D visualization analysis system is proposed for dam foundation curtain grouting. Based on the real-time control technology, the optimization method and the set theory, a mathematical model ...A real-time monitoring and 3D visualization analysis system is proposed for dam foundation curtain grouting. Based on the real-time control technology, the optimization method and the set theory, a mathematical model of the system is established. The real-time collection and transmission technology of the grouting data provides a data foundation for the system. The real-time grouting monitoring and dynamic alarming method helps the system control the grouting quality during the grouting process, thus, the abnormalities of grouting, such as jacking and hydraulic uplift, can be effectively controlled. In addition, the 3D grouting visualization analysis technology is proposed to establish the grouting information model(GIM). The GIM provides a platform to visualize and analyze the grouting process and results. The system has been applied to a hydraulic project of China as a case study, and the application results indicate that the real-time grouting monitoring and 3D visualization analysis for the grouting process can help engineers control the grouting quality more efficiently.展开更多
A numerical investigation was performed on the reduction of the fluid forces acting on the square cylinder in the laminar flow regime with a perforated plate. The effects of geometric parameters such as the distance b...A numerical investigation was performed on the reduction of the fluid forces acting on the square cylinder in the laminar flow regime with a perforated plate. The effects of geometric parameters such as the distance between the square cylinder and the perforated plate on the wake of the square cylinder were discussed. Furthermore, the flow characteristics such as the drag coefficient, lift coefficient, Strouhal number and flow pattern were obtained. It can be concluded that the drag force of the square cylinder reduces to some extent due to the addition of the perforated plate. The flow structure varies when the perforated plate is located behind the square cylinder. Moreover, the recirculation zone augments with the increase of L/D, and the vortex trace on the upper and lower surface of the square cylinder moves gradually backwards until a stable recirculation zone formed between the square cylinder and the perforated plate.展开更多
In this paper, a novel robust precoder with imperfect channel state information(CSI)is proposed for multi-input multi-output(MIMO)cognitive multiuser networks equipped with relays. In the proposed model, the secondary...In this paper, a novel robust precoder with imperfect channel state information(CSI)is proposed for multi-input multi-output(MIMO)cognitive multiuser networks equipped with relays. In the proposed model, the secondary users(SUs)are allowed to share the spectrum with the primary users(PUs)when the interference temperature(IT)is below a specific threshold. The transmitting strategy of relays is amplify-and-forward(AF), and the CSI error is characterized in terms of spherical uncertainty region. A minmax problem for the transmit power of the relays is considered when the mean square error(MSE)of SUs and the IT of PU meet their corresponding thresholds, and it is transformed into a semi-definite programming(SDP)problem to search for the solution. Numerical simulations demonstrate the effectiveness of the proposed precoder.展开更多
文摘The twenty years history of Journal of Southeast University (English Edition) and its significant achievements are briefly reviewed. Based on the experiences accumulated over its twenty years, some suggestions for improving the quality of this English-language academic journal are proposed, including focusing on the report of the excellent disciplines of its sponsoring university, attracting high-level papers by giving the priority of publication, publishing special issues for experts and scholars at home and abroad, shortening publication period, and realizing the internationalization of the members of the editorial committee, etc.
文摘Based on the data collected from the questionnaires, this paper discusses various problems concerning intercultural communication competence the non-English majors at ＂high-leveled, applicationoriented＂ level faced in Shanghai Institute of Technology. Besides, it analyzes the necessity and feasibility in developing intercultural communication competence, and puts forward some constructive suggestions to enhance intercultural communication competence in adult English teaching.
基金Supported by the National Natural Science Foundation of China(No.51309179)the Tianjin Municipal Natural Science Foundation(No.14JCQNJC07000)
文摘Three- and four-bucket offshore wind power foundations with a new form of force-transferring structure are proposed in this paper, and the integrated finite element model of foundation-soil-transition structure is established by using ABAQUS. The carrying capacity of the proposed foundations is studied under vertical load, horizontal load and bending moment. It can be seen that the vertical bearing capacity of multi-bucket foundation can be roughly estimated by the vertical bearing capacity of single-bucket; the horizontal bearing capacity of the three-bucket foundation scheme is controlled by displacement, while that of the four-bucket foundation scheme is controlled by the internal forces of soils. Moreover, the carrying capacity is provided by the overall structure formed by multi-bucket before soil failure. Compared with the conventional single-bucket foundation, there are mainly tension and pressure that are applied to the multi-bucket foundation, so that the carrying capacity of the foundation can be fully utilized. The probability of soil failure can be well reduced with the proposed multi-bucket foundation, and the stress transmission of force-transferring structure is more consistent through steel beams with variable cross-section.
基金Supported by the National Science and Technology Support Program of China(No.2015BAF07B04)
文摘Based on wavelet packet transformation(WPT), genetic algorithm(GA), back propagation neural network(BPNN)and support vector machine(SVM), a fault diagnosis method of diesel engine valve clearance is presented. With power spectral density analysis, the characteristic frequency related to the engine running conditions can be extracted from vibration signals. The biggest singular values(BSV)of wavelet coefficients and root mean square(RMS)values of vibration in characteristic frequency sub-bands are extracted at the end of third level decomposition of vibration signals, and they are used as input vectors of BPNN or SVM. To avoid being trapped in local minima, GA is adopted. The normal and fault vibration signals measured in different valve clearance conditions are analyzed. BPNN, GA back propagation neural network(GA-BPNN), SVM and GA-SVM are applied to the training and testing for the extraction of different features, and the classification accuracies and training time are compared to determine the optimum fault classifier and feature selection. Experimental results demonstrate that the proposed features and classification algorithms give classification accuracy of 100%.
文摘Purpose： The purpose of the study was to examine the psychometric properties of the Chinese-translated Behavioral Regulation in Exercise Questionnaire-2 （C-BREQ-2） among Chinese university students from the Mainland and Hong Kong of China. Methods： University students from the Mainland （n = 191） and Hong Kong （n=194） of China participated in this study. Factorial validity, discriminant validity, nomological validity, internal reliability, and measurement invariance across sample of the C-BREQ-2 were examined. Results： Confirmatory factor analysis provided support for the factorial validity of the 18-item, 5-factor structure C-BREQ-2. Examination of the 95% confidence interval of the inter-factor correlations suggested that the C-BREQ-2 assesses related but distinct constructs, which provided support for its discriminant validity. The internal consistency reliability of the C-BREQ-2 was found acceptable. Examination of the pattern of inter-factor correlations between different regulations suggested that a simplex-like pattern was displayed, which provided evidence for the nomological validity of C-BREQ-2. The results from multi-group confirmatory factor analysis suggested that the factor loadings and variances/ covariances of the C-BREQ-2 measurement model were invariant across the Chinese university students in the Mainland and Hong Kong of China. Conclusion： The current study provided further psychometric evidence for the C-BREQ-2, which makes the further application and research of self-determination theory （SDT） based motivation in relation to exercise and physical activity in the Mainland of China context possible.
基金Supported by the National Natural Science Foundation of China(No.60971108,No.61101243,No.61271292)
文摘The quaternion coherence problem exists in the data model of the conventional dimensional reduced quaternion estimation of signal parameters via rotational invariance techniques(DRQ-ESPRIT), and DRQ-ESPRIT would lose degrees of freedom(DOFs)when it is used to implement the spatial smooth operation. An improved DRQ-ESPRIT algorithm based on 2-level nested vector-sensor array is proposed in this paper. The quaternion coherence problem is solved by switching the multiplication sequence of spatial direction vector and electric field. Meanwhile, nested array and Khatri-Rao subspace approach are used to increase the number of DOFs, thus the proposed algorithm can estimate more incident sources than DRQ-ESPRIT, and the estimations of direction of arrival(DOA)and polarization parameters are more accurate. Simulation results demonstrate the effectiveness of the proposed algorithm.
文摘To conform to the college English teaching reform from English for General Purposes (EGP) to English for Academic Purposes (EAP) in the vital transfer era, the Foreign Language Department of Second Military Medical University (SMMU) launched an English for Medical Academic Purpose (EMAP) curriculum with English Forum on Medical Humanities (EFMH), a project-based teaching practice. Based on Rogers' learner-centered humanistic teaching approach which emphasizes students' involvement and experiences in learning, EFMH puts students and their practice in a central place. After four-year exploration and operation, the Forum has developed from a small-scaled embryo into an internationalized, standardized and professionalized event, having produced fruitful outcomes. It is expected that the success of EFMH will provide inspiring experiences and enlightenments for higher medical education in terms of academic English teaching and teachers' responsibilities to foster high-quality medical students.
基金This research was supported by the Fundamental Research Funds for the Central Universities of China under Grant No.3162020ZYKC05Beijing Social Science Funds under Grant No.19YYC017.
文摘The current study investigates a group of Chinese undergraduates’perceptions of Chinese culture.It examines the discourses that the students drew on to assign meaning to Chinese culture and how the students used these discourses in constructing their Chinese cultural identity.A qualitative study was conducted collecting written self-reflective reports on critical intercultural incidents from 39 Chinese undergraduates at a university in Beijing.Questions designed to evoke reports from the students had them describe incidents in their past intercultural experiences that made them acutely aware of themselves“being Chinese”and specify aspects of Chinese culture that they felt such awareness could be attributed to.A discourse analysis reveals the multiplicity and contextuality of the students’notions of Chinese culture.The findings raise important considerations for contemporary Chinese undergraduates’cultural identity and their much debated“identity crisis.”
基金Supported by the National Natural Science Foundation of China(No.51408399)
文摘Combining lubrication theory and CFD technology, a finite element model is established to simulate the rain-wind-induced vibration(RWIV). Based on Spalart-Allmaras(S-A)turbulence type, COMSOL software is adopted to calculate the wind pressure coefficient and wind friction coefficient that vary with the location and time. To verify the veracity and rationality of this method, the formation and evolution of rivulets at different wind speeds are studied and compared with the existing experimental results. Furthermore, the time, location, height and width of the initial formation of rivulets are analyzed at different wind speeds, cable inclination angles and wind yaw angles. The results show that the three influencing factors mentioned above have great effect on the formation of rivulet, and the influencing tendency, range and degree are different from each other.
基金Supported by the Innovative Research Groups of the National Natural Science Foundation of China(No.51321065)the National Natural Science Foundation of China(No.51339003 and No.51439005)
文摘A real-time monitoring and 3D visualization analysis system is proposed for dam foundation curtain grouting. Based on the real-time control technology, the optimization method and the set theory, a mathematical model of the system is established. The real-time collection and transmission technology of the grouting data provides a data foundation for the system. The real-time grouting monitoring and dynamic alarming method helps the system control the grouting quality during the grouting process, thus, the abnormalities of grouting, such as jacking and hydraulic uplift, can be effectively controlled. In addition, the 3D grouting visualization analysis technology is proposed to establish the grouting information model(GIM). The GIM provides a platform to visualize and analyze the grouting process and results. The system has been applied to a hydraulic project of China as a case study, and the application results indicate that the real-time grouting monitoring and 3D visualization analysis for the grouting process can help engineers control the grouting quality more efficiently.
文摘A numerical investigation was performed on the reduction of the fluid forces acting on the square cylinder in the laminar flow regime with a perforated plate. The effects of geometric parameters such as the distance between the square cylinder and the perforated plate on the wake of the square cylinder were discussed. Furthermore, the flow characteristics such as the drag coefficient, lift coefficient, Strouhal number and flow pattern were obtained. It can be concluded that the drag force of the square cylinder reduces to some extent due to the addition of the perforated plate. The flow structure varies when the perforated plate is located behind the square cylinder. Moreover, the recirculation zone augments with the increase of L/D, and the vortex trace on the upper and lower surface of the square cylinder moves gradually backwards until a stable recirculation zone formed between the square cylinder and the perforated plate.
基金Supported by the Beijing Key Laboratory of Work Safety Intelligent Monitoring(Beijing University of Posts and Telecommunications)
文摘In this paper, a novel robust precoder with imperfect channel state information(CSI)is proposed for multi-input multi-output(MIMO)cognitive multiuser networks equipped with relays. In the proposed model, the secondary users(SUs)are allowed to share the spectrum with the primary users(PUs)when the interference temperature(IT)is below a specific threshold. The transmitting strategy of relays is amplify-and-forward(AF), and the CSI error is characterized in terms of spherical uncertainty region. A minmax problem for the transmit power of the relays is considered when the mean square error(MSE)of SUs and the IT of PU meet their corresponding thresholds, and it is transformed into a semi-definite programming(SDP)problem to search for the solution. Numerical simulations demonstrate the effectiveness of the proposed precoder.
