The North China Institute of Science and Technology is a university in Hebei, China which was founded in 1984. The only public university affiliated to the State Administration of Work Safety, the Institute was originally the branch school of the Beijing Coal Management Institute at Yanjiao. It was in 2002 that the Institute adopted its present name. Wikipedia.
Zhang T.,North China Institute of Science and Technology
Proceedings - 3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011 | Year: 2011
The common control method cannot achieve good results to the position follow-up system because of its inaccuracy mathematical model. On the base of merits of fuzzy control, i.e. fuzzy control needless inaccuracy mathematical model of controlled plant, this paper performed design process and simulation calculations applying fuzzy controller to design the position follow-up system. Observing the tracing results, the paper achieves the desired results with its high precision and velocity and proves the application value of fuzzy control. © 2011 IEEE.
Yang W.-Y.,North China Institute of Science and Technology
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | Year: 2013
The sizes and distribution range of collapse columns existing in Huainan mining area have been found out by 3-D seismic exploration, but the water enrichment conditions inside the columns are not clear, which greatly influences the safety mining. In this paper, the Controlled-Source Audiomagnetotellurics and Electromagnetic Wave method were adopted to prospect the water abundance of collapse columns. The result shows that the apparent formation resistivity has a certain correlation with the water abundance, that is, low resistivity is corresponding to abundant water, while high resistivity correlates with low or no water abundance. Meanwhile, the water enrichment of collapse column are analyzed according to the horizontal and longitudinal apparent resisitivity profiles in different depth, and the detection results show that the water abundance in the south of collapse column and partial areas near the faults are relatively large, namely there only exists partial water enrichment in the collapse column. A small amount of validation drillings on the ground have been constructed, and the detection results correspond well with those of drilling, which provides a new integrated geophysical method for the prospecting of collapse column in coal mine.
Pan W.M.,North China Institute of Science and Technology
Applied Mechanics and Materials | Year: 2014
Many researches use diff environmental conditions or application requirements in WSN. In the default Deluge mechanism, it will recover a sensor node from an updating error by reloading the stored full image again or waiting for the host machine to retransmit the full image again. This strategy is easy to implement and intuitive, but replacing the current executing image by retransmitting a full image file again is resource-consuming. To avoid retransmitting the full image when performing recovery, at the time when diff-based updating procedures have been finished, sensor nodes using our recovery mechanisms will backup the received patch files (i.e. diff script) in flash memory. Our mechanisms would effectively utilize flash memory space to store several backup patch files. When recovery is needed, our mechanisms would incrementally recover a failed node by patching up the system with each of the backup patch files. In the design of our recovery mechanisms, the failed sensor node will first try its best to recover itself without the assistance of the host machine, in order to avoid affecting the operations of other normal nodes when performing recovery procedures. Thus, compared with the full image replacement strategy, our mechanisms can save many computing resources. © (2014) Trans Tech Publications, Switzerland.
Ding D.,Hebei Normal University |
Ding D.,North China Institute of Science and Technology |
Yan F.-L.,Hebei Normal University
Physics Letters, Section A: General, Atomic and Solid State Physics | Year: 2013
We propose an efficient scheme for the generation of three-photon Greenberger-Horne-Zeilinger (GHZ) state with linear optics, nonlinear optics and postselection. Several devices are designed and a two-mode quantum nondemolition detection is introduced to obtain the desired state. It is worth noting that the states which have entanglement in both polarization and spatial degrees of freedom are created in one of the designed setups. The method described in the present scheme can create a large number of three-photon GHZ states in principle. We also discuss an approach to generate the desired GHZ state in the presence of channel noise. © 2013 Elsevier B.V. All rights reserved.
Zhang X.,North China Institute of Science and Technology
Applied Mathematics and Information Sciences | Year: 2014
Unmodelled dynamics and perturbations are always immeasurable. In this paper, an adaptive sliding mode control (ASMC) based on wavelet network (WN) for a class of non-affine multi-variable nonlinear discrete systems is presented in order to compensate them. Wavelet network which parameters are tuned on-line is adopted to realize the equivalent control, and hitting controls are added in order to satisfy reaching conditions. By combining the adaptive WN with SMC strategy, the constructed control law has many advantages such as robustness, adaptive characters, and the precise mathematic models of controlled plants are not required. Finally, experiment on an inverted pendulum control system based on the proposed control design method is given to verify its effectiveness and performance. © 2014 NSP Natural Sciences Publishing Cor.