Luo L.-R.,The MCC Group |
Luo L.-R.,China JingYe Engineering Co. |
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.
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.
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.
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.
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.