Shijiazhuang, China

Shijiazhuang Railway University
Shijiazhuang, China
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Ding S.,Shijiazhuang Railway University | Lv J.,Shijiazhuang Railway University
Journal of Computational and Theoretical Nanoscience | Year: 2017

Evaluation on the sports scientific research performance, as the way to judge the scientific research ability of sports teachers for universities and colleges, is of great significance to improve the overall sports scientific research quality. This paper studied on the evaluation on the sports scientific research performance from the following perspectives. Firstly, the fundamental methods of evaluating the sports scientific research performance was given; the second was to present the indices for the performance evaluation and analyze specifically the indices; thirdly, the gray ideal domain of the evaluation indices was established as well as the gray correlation coefficients of the evaluated objects and the gray ideal domain; the fourth was to obtain the weight of indices via the comprehensive analysis method and to build the weighted gray correlation analysis model for the sports scientific research performance evaluation to get the gray correlation degree of the evaluated objects which served to judge the sports scientific research ability and level of objects. For the last part, this paper conducted the case study which verified the simple calculation and operation of the model. Copyright © 2017 American Scientific Publishers.

Luo L.-R.,The MCC Group | Luo L.-R.,China Jingye Engineering Corporation Ltd | Liu Z.-G.,Shijiazhuang Railway University | Yan Y.-C.,China University of Geosciences
Yantu Lixue/Rock and Soil Mechanics | Year: 2011

The function and development of geological prediction are summarized. The misunderstanding of geological prediction and problems of various instruments are analyzed. The concept of geological prediction system is proposed. The contents of geological analysis technology of the tunnel area, prediction technology of bad geological bodies, and warning technology for close major geological disasters are illuminated. The steps of geological prediction system are as follows: the geological factors are classified by intricacy according to the conclusions of geological analysis technology and standards for intricacy classification of geological factors; different programs of geological prediction system are formulated for different geological intricacy degrees; and dynamic control on the site is considered. The geological prediction system is applied to an example of F3 weathered slots of Xiamen subsea tunnel. Finally, the development trend of geological prediction system is put forward. The purpose of this research is to improve the geological prediction work, make the geological prediction results really play a guiding role in the construction process on the site, so as to decrease the investment and casualties of the project to the best extent.

Li Y.,Shijiazhuang Railway University | Ma W.,Authorities Service Center
Proceedings - 2010 International Symposium on Computational Intelligence and Design, ISCID 2010 | Year: 2010

This paper is a survey on the application of artificial neural networks in forecasting financial market prices. The objective of this paper is to appraise the potential of using artificial neural networks to predict the financial system, as it is reflected in many relevant articles. It will provide some guidelines and references for the research and implementation. This paper begins with an introduction to the theory of artificial neural networks. Subsequently it focuses on the forecast of stock prices and option pricing based on a non-linear ANN model. It proceeded with a presentation of the application of ANN in predicting exchange rates. The paper then reviewed the theoretical literature on the prediction of banking and financial crisis based on artificial neural networks. In general artificial neural network is a valuable forecast tool in financial economics due to the learning, generalization and nonlinear behavior properties. Finally it identifies a number of important opportunities for future research on the application of neural networks in financial economics. © 2010 IEEE.

Ma W.-Y.,Tongji University | Ma W.-Y.,Shijiazhuang Railway University | Gu M.,Tongji University
Gongcheng Lixue/Engineering Mechanics | Year: 2012

A two-degree-of-freedom model for the coupled galloping of an iced conductor is developed in this paper. Using Routh-Hurwitz criterion, the galloping instability of a quasi-oval iced conductor, which have been tested in a wind tunnel by high frequency balance, is investigated on the basis of the new model. The research indicates that: the polynomial form with order higher than seven is sufficient of describing its aerodynamic force coefficients; the swing of the iced conductor has great influence on its stability, while the narrower range of galloping instability wind directions and higher critical wind velocity are obtained from the model without consideration of swing; structure damping plays significant roles in promoting critical wind velocity. These findings in the present paper provide the general characteristics of galloping instability for an quasi-oval iced conductor.

Liu Y.-Q.,Beijing Jiaotong University | Yang S.-P.,Shijiazhuang Railway University | Liao Y.-Y.,Beijing Jiaotong University
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2010

The bad effect on vibration reduction usually appears when adopting a traditional skyhook semi-active control in high-frequency domain. In order to overcome the disadvantage, an improved semi-active control strategy based on acceleration damping was proposed. A high speed EMUs(Electric Multiple Units) model containing two motor cars and two traction cars with 104 DOFs was built by using conventional software ADAMS (Automatic Dynamic Analysis of Mechanical Systems), which breaks through the traditional methods' limitation of single car based model. The proposed semi-active control methods were designed and co-simulated by combined use of ADAMS and Simulink. According to the co-simulation results, the effects of two semi-active control methods on riding quality and safety were compared in both time domain and frequency domain, and the influences of time-delay on system performances were analyzed. The results show that the performances of improved semi-active control are better in riding quality and vibration reduction.

Ma Y.,Shijiazhuang Railway University | Wang X.-L.,Shijiazhuang Railway University | Liu Z.,Shijiazhuang Railway University | Guo Y.-Y.,Shijiazhuang Railway University
Yantu Lixue/Rock and Soil Mechanics | Year: 2011

Evaluation of seismic stability of rock slopes is the important foundation for prevention of seismic unstability of rock and soil slopes. In view of the multi-source and fuzzy characteristics in evaluation process, by using engineering variable fuzzy set theory for reference, fuzzy variable evaluation model is applied to evaluate the seismic stability of rock slopes. First, by comprehensive consideration of the rock slopes internal structure and external natural conditions, six parameters including the characteristics of the geotechnical body, the characteristics of the neotectonics, slope height, slope angle, the annual average precipitation, site seismic intensity are selected as the indices for evaluation index system and established rating standard, then the weights of evaluation factors in the model are obtained from the index practical data discreteness by using improved entropy weight method; finally, by changing the fuzzy variable evaluation model parameters to evaluated seismic stability of rock slopes by linear and nonlinear, and obtained stability level by mean value. The method has been applied to natural slope and cutting slope instances. The results show that the fuzzy variable evaluation model results are reasonable and objective; and they have better reliability and stability so as to provide a new research method and idea for seismic stability of rock slopes.

Han X.-M.,Shijiazhuang Railway University | Sun M.-L.,Shijiazhuang Railway University | Li W.-J.,Shijiazhuang Railway University | Zhu Y.-Q.,Shijiazhuang Railway University
Yantu Lixue/Rock and Soil Mechanics | Year: 2011

Numerical simulation (FLAC3D) and field experiments are used to study the shape effect of tunnel section. Stress of primary support and tunnel deformation under horseshoe-shaped section and large curvature wall, quasi circle-shaped section are analysed and compared. Numerical simulation and field measurement indicat that deformation and deformation rate of surrounding rock under quasi circle-shaped section could be effectively lessened, especially convergence of side wall, compared with that under horseshoe-shaped section. Ratio between lost displacement while measuring in-site and total displacement of surrounding rock is large, and the lost ratio of lower bench is largest. Field experiments of different support stiffnesses are conducted. It is measured and analysed that pressure of surrounding rock mass, axial force of anchor, stress of steel frame and stress of shotcrete under different primary support parameters. Also the contact pressure shared by secondary lining and the stress of mode concrete under different primary support stiffnesses are measured and analysed. Deformation of tunnel under different support stiffnesses are also measured. It is concluded that the contact pressure of secondary lining and pressure ratio shared by secondary lining increae with support stiffness increase. And suitable support form is synthetically determined. That would offer valuable practical experience to tunnelling in soft rock mass with high tectonic stress-field.

Huang L.,Shijiazhuang Railway University | Shang Y.L.,Shijiazhuang Railway University | Zhang H.,Shijiazhuang Railway University
Proceedings of the Institution of Civil Engineers: Bridge Engineering | Year: 2014

The Tianjin Haihe movable bridge in China has the largest span among similar bridges in Asia. Owing to the dual characteristics of being both a bridge and heavy machinery with mechanical, hydraulic, electric and intelligent control devices, the construction of its steel box girder requires appropriate installation and control technology. Because of the stringent on-site navigation restrictions and blockage conditions, as well as mechanical characteristics during construction, a semi-supported cantilever installation and erection scheme is proposed, in which a bridge-erecting machine, temporary steel pipe support, bridge cantilever construction and other traditional methods are used in combination. Unlike traditional bridge closure technologies, new alignment closure and central locking closure control technologies are employed. The latter requires that the locking device be precisely assembled and adjusted to be horizontal for the suitable operation of the central locking equipment. The execution of this construction practice shows that the technology is feasible and effective.

Wang Y.J.,Shijiazhuang Railway University
Applied Mechanics and Materials | Year: 2014

Athletics activities are favored by people, which is the foundation of the development of athletics. However, for the intermediate and superior athletics, the research and understanding of athletics theory are neither in-depth nor accurate.Accordingly, this is not conductive to the development of athletics.this essay tries to research on the focus of Athletics, the theme of Athletics, the quintessence of athletics and the foundation of athletics in order to help the athletes understand the basic concept, the foundamental thoughts and the value orientation of athletics, so that a complete Athletics theory syetem can be formed to help better athletics work and promote the athletics activities of all levels in a healthy direction. © (2014) Trans Tech Publications, Switzerland.

Huang L.,Shijiazhuang Railway University | Shang Y.,Shijiazhuang Railway University
Proceedings of the 2010 IEEE International Conference on Progress in Informatics and Computing, PIC 2010 | Year: 2010

Modeling technology is the key to the advancement of road & bridge construction problem solving technology. In light of the existing defects of problem-solving modeling technology, a new function graphic modeling technology which can reflect problem solving characteristics is proposed. Based on function graphic object which has engineering properties of length-variable and unstructured, and can exist independently and work cooperatively with each other, a group of function graphic objects are used to emulate planed road & bridge construction sub-problem, and solving process is carried out interactively and dynamically by creating, operating, and deducing function graphic objects. Through the proposed function graphic modeling technology, the traditional modeling method and realization model of road & bridge construction problem solving are broken through, and a new modeling and realization technology system which is suitable for solving characteristics of road & bridge construction problem is set up. ©2010 IEEE.

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