Powerchina Zhongnan Engineering Co.

Changsha, China

Powerchina Zhongnan Engineering Co.

Changsha, China
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Liu X.,Hunan Institute of Engineering | Li W.,Powerchina Zhongnan Engineering Co Ltd.
International Journal of Online Engineering | Year: 2017

At present, wireless sensor networks (WSN) technology is a field of much research interest in the area of information technology. The application of wireless sensor networks is expected to be very broad. With the development of communication protocol and their corresponding components, wireless sensor networks technology plays an increasingly important role in the power industry. The analysis and forecast of electric power data is essential to the construction and operation of the power network. Through the wireless sensor networks, we can obtain comprehensive power data. Then we can better forecast the power load through the data we obtain from the wireless sensor networks. In this paper, we propose an improved LSSVM method. We collect the power data by the wireless sensor networks and use the improved LSSVM method to forecast the power load. Experimental results demonstrate the effectiveness of the proposed method.


She S.,Powerchina Zhongnan Engineering Co Ltd.
International Journal of Online Engineering | Year: 2017

In this paper, regarding the complexity of polluted water, through analyzing the water environment and its surrounding factors, a water quality monitoring system architecture based on wireless sensor networks is proposed. Firstly, the water quality parameters collected by the sensor are processed by the signal conditioning circuit and then transmitted to the sensor nodes so as to realize the data acquisition of the water quality parameters. Afterwards, through the function analysis of each node in the ZigBee network, the hardware design and software program design of the network coordinator node and the routing node are completed. After joint debugging of the hardware and software, point-to-point communication and system networking of the ZigBee network are achieved. Finally, the results of experiments show that the system can realize the data acquisition and wireless transmission of the temperature and PH parameters of different solutions. Furthermore, each node realizes its own function and meets the design requirements of the system.


Liu J.,Hunan Institute of Engineering | Li W.,Powerchina Zhongnan Engineering Co.
C e Ca | Year: 2017

The emergence of wireless sensor networks (WSN) and the rapid development of the medical industry are attributable to the progress of information technology and communication technology. Nevertheless, the measurement of physiological parameters of patients is a time-consuming, repetitive and tedious work. Luckily, remote monitoring helps to expand the patient's activity space, reduce the work intensity of the monitoring staff, and lower the medical costs. Against this backdrop, this paper designs a remote physiological parameter monitoring system based on ZigBee WSN. First of all, wireless sensors are used to collect the patient's body temperature, pulse, blood pressure and blood sugar. Then, the data is processed and sent to the wireless communication module. Finally, the data is transmitted to the monitoring centre by ZigBee WSN. The physiological parameters of the patients are obtained by an experiment, and the results are compared with the traditional measurement results. The experimental results show that the system is stable and reliable, and can realize the wireless acquisition, transmission and display of the patient's physiological parameters. In this way, this research realizes the remote monitoring of physiological parameters.


Zhang P.,Hunan University | She S.,Powerchina Zhongnan Engineering Co.
International Journal of Interactive Mobile Technologies | Year: 2017

Wireless sensor networks as an emerging technology have garnered a lot of attention recently. With the development of wireless sensor networks, some problems such as data delay, information loss, and others have gradually appeared. In order to cope with these problems, evaluating the service quality in wireless sensor networks is crucial. However, how to evaluate the service quality in wireless sensor networks and especially how to accurately portray the preferences of a decision maker exactly are often difficult. To deal with this challenge, firstly, an evaluation system of attributes related to the service quality in wireless sensor networks is constructed based on the existing studies. Then, the probabilistic linguistic method including the definition of probabilistic linguistic term sets, the operators of probabilistic linguistic term sets, and the ranking order of probabilistic linguistic term sets are introduced. Probabilistic term sets used to denote the preferences of a decision maker are considered as more appropriate expressions than classical linguistic term sets, 2-tuple linguistic term sets, and portion linguistic term sets in the process of evaluating the service quality in wireless sensor networks. Finally, the probabilistic linguistic method is applied in the constructed service quality in wireless sensor networks so as to demonstrate its validity and applicability and further to help the decision maker find the problems in the service quality in wireless sensor networks and improve them.


Peng L.,Hunan Institute of Engineering | She S.,Powerchina Zhongnan Engineering Co.
C e Ca | Year: 2017

The reliability of an electric power communication system is closely related to the safe and stable operation of the power grid. Considering the complex structure of an electric power communication system, this paper first defines the reliability of the electric power communication system and puts forward its influencing factors and quality standards. Then, starting from such four modules as network topology, site equipment, environment variables and management, the authors study and analyze the indices to measure the reliability of each module of the electric power communication system, and construct a reliability evaluation system to improve the operability of the reliability evaluation. At last, the reliability evaluation software is developed based on the proposed comprehensive evaluation system, and applied to evaluate the reliability of a power communication network in Hebei Province, China. The case study proves that the proposed reliability evaluation system is feasible and practicable.


Liu J.,Hunan Institute of Engineering | Li W.,Powerchina Zhongnan Engineering Co Ltd.
Revista de la Facultad de Ingenieria | Year: 2017

With the development of information technology, more and more video surveillance systems have been applied in various fields. However, the current video surveillance systems can only record the video, or can only provide limited intelligent monitoring capabilities. At present, the tracking of specific target in video surveillance system is mainly based on manually, which is not only costly, but also inefficient. Therefore, how to detect and track specific targets in video surveillance is a hotspot in this field. In this paper, the detection of video monitoring system is studied, and a moving object detection algorithm based on optical flow method and frame difference method is proposed. First of all, this paper introduces the definition and classification of the moving object detection algorithm. Secondly, the optical flow method and the frame difference method are analyzed, and their limitations are pointed out. Thirdly, a new algorithm is proposed, which is based on the similarity analysis of optical flow method and frame difference method. Finally, the experimental results show that the proposed algorithm can be used in specific situations.


Peng L.,Hunan Institute of Engineering | Li W.,Powerchina Zhongnan Engineering Co.
C e Ca | Year: 2017

With the expansion of power communication network, the network is getting more and more complex and capable of withstanding load. In order to ensure the security and stability of the complex network, this paper proposes an optimization method based on complex network topology network. The method optimizes the network by rational addition of effective lines through identification and analysis of the vulnerabilities in the power communication network. It is capable of improving the defense ability of the network, increasing the broadband utilization, reducing the congestion rate and delaying the sudden drop in performance. Finally, the effectiveness of the proposed method is validated with an example.


Zhou M.,PowerChina ZhongNan Engineering Corporation Ltd | Dai G.-L.,Central South University
Tiedao Xuebao/Journal of the China Railway Society | Year: 2015

A finite element analysis model was established on the stability of longitudinally connected ballastless slab track on simply-supported beam bridges of high speed railway. In this model, solid finite elements were used to simulate track structure; contact elements were applied to simulate the contact constraint relationship between adjacent layers; compression bar elements were used to simulate the support of bridges to the track; nonlinear spring elements were applied to simulate the constraint of pigeonhole type lateral chock blocks on track structure. The correctness of the model was verified through theoretical calculation. On the basis of this, constraints between layers, section stiffness of mortar layer and the layout of pigeonhole type lateral chock blocks on the stability of longitudinal connected ballastless slab track were compared. The research showed that the basic assumptions of traditional stability calculating methods did not match the practical conditions, and the caculating results tended to be unsafe. The nonlinear constraint relations between layers must be calculated during the stability analysis of the track structure. The weaker the constraint between the layers was, the worse the stability of the track structure. The track structure lost its stability when the temperature of the longitudinally connected ballastless slab track rose to 18.9℃ if pigeonhole type lateral blocks were not installed. The spacing between adjacent blocks should not be more than 18.3m when the maximum permissible temperature of track structure was 30℃. The stability of track structure can be effectively improved by improving the quality of mortar layers and reducing the spacing between adjacent blocks. ©, 2015, Science Press. All right reserved.


Zhou J.,Huazhong University of Science and Technology | Lu Y.,Power China Zhongnan Engineering Corporation Ltd | Li C.,Huazhong University of Science and Technology
Energy Conversion and Management | Year: 2015

In the manuscript "Comment on 'A hybrid multi-objective cultural algorithm for short-term environmental/economic hydrothermal scheduling' by Youlin Lu et al. [Energy Convers. Manage. 52 (2011) 2121-2134]", Abdollah Ahmad et al. reported that there were some inaccuracies made by Youlin Lu et al. in the paper [Energy Convers. Manage. 52 (2011) 2121-2134] while presenting the solutions. By detailed analysis and checking, the different results in the two papers are caused by taking the storage volume at different moments of one period during hydro generation calculation. Abdollah Ahmad et al. take the final storage volume of the period when doing the calculating, while Youlin Lu et al. take the initial storage volume of the period. The checking results indicate that the schemes in the two papers are correct and reasonable only they are obtained by taking different storage volumes. These schemes have less fuel cost and emission while satisfying various constraints. Moreover, the key references cited in the original paper also take the initial storage volume of the period to calculate hydro generation, which are suitable for the comparison of the optimal results. Finally, few inaccurate expressions in the original paper [Energy Convers. Manage. 52 (2011) 2121-2134] are modified. © 2015 Elsevier Ltd. All rights reserved.


Chen X.,Powerchina Zhongnan Engineering Corporation Ltd | Zhang D.,Powerchina Zhongnan Engineering Corporation Ltd
Shuili Fadian Xuebao/Journal of Hydroelectric Engineering | Year: 2015

Installed capacity is an important indicator of a hydropower station, its scale directly related to the energy efficiency, efficiency of water resources use, and rational utilization of equipments and investment etc. The factors of installed capacity are not the same for hydropower stations of different regulation performances. This paper divides hydropower stations into two types, good regulation performance and limited regulation performance. A general procedure and the existing issues in the practical work of making choices for the stations of different performances are discussed, proceeding from the factors influencing the choices of installed capacity. Through the analysis of examples, confirmed the correctness of the factors in this paper, which provided a reference for the choices of installed capacity. Last, this paper suggests that it is necessary to expand the installed capacity of the existing hydropower stations timely but this should depend on the timing. ©, 2014, 10031243 Tsinghua University Press. All right reserved.

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