Hunan mechanical and electrical polytechnic

Changsha, China

Hunan mechanical and electrical polytechnic

Changsha, China
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Lu B.,Hunan Mechanical and Electrical Polytechnic | Huang W.,Hunan University
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2011

This paper proposes a novel hybrid wavelet-energy operator method for accurate voltage sag detection and measurement. In the proposed method, the voltage sag is decomposed into two signal parts by wavelet transform: one is a detail signal, the other is an approximation signal. And in the detail signal, the start time and the end time of the sag signal can be detected. By applying an energy operator to the approximation signal, the temporary sag decline in value can be measured accurately and quickly. At the same time, the wavelet transform (WT) in this method acts like a filter. WT can weaken or remove the high frequency disturbance from voltage sag to enhance the noise immunity and accuracy of the energy operator. Simulation and experimental results verify the effectiveness of the algorithm.


Li L.Y.,Hunan Mechanical and Electrical Polytechnic
Applied Mechanics and Materials | Year: 2014

This paper established the nonlinear dynamic model of finished automobile to study the influence of suspension structural parameters, automotive braking and steering on the vehicle driving comfort and handling stability. The simulation results show during steering the body roll changed indirectly the tire lateral force, which affected yaw and lateral movement, and the interaction between the suspension and steering between systems is very significant especially under condition of the uneven road excitation. When the peak of the tire steering angle increased, the roll angle of vehicle body became larger and larger, followed by the change of body posture and the deterioration of ride comfort. With the increase of the steering angle, the lateral acceleration of the vehicle became larger and larger, and even resulted in tire skidding, thus reducing the driving safety of the vehicle. © (2014) Trans Tech Publications, Switzerland.


Liao J.,Hunan Mechanical and Electrical Polytechnic
Lecture Notes in Electrical Engineering | Year: 2013

It is one of the most important methods for agriculture automatization in Greenhouse's measurement and control. Wireless Autoregulation system for greenhouse's temperature and humidity based on ZigBee technology was very satisfied with the request of low power consumption, low-cost and scale expanding afterward. We select the transceiver CC2430 as key chip set and designed the hardware interface between CC2430 and MCU Atmega128 and descript software flow for communication, presenting a scheme of wireless sensor network node based on CC2430 chip set, realized the real selfcontrol, it can Monitor every greenhouse's temperature,humidity and control and regulate Sprinkler valve, Experiment proves the design system can remotely and automatically monitor areas online, it has the economical, effective, real-time, convenient character and low energy consumption,which have a important meaning in promoting the Greenhouse to advance. © 2013 Springer-Verlag.


Li Y.,Hunan Mechanical and Electrical Polytechnic
Engineering Technology, Engineering Education and Engineering Management - International Conference on Engineering Technology, Engineering Education and Engineering Management, ETEEEM 2014 | Year: 2015

With the continuous development of science and technology, sports training are coming to the scientific era; it has penetrated into all aspects of sports training from the experience of the era to modern science and technology, and plays an increasingly large role. Computer and information processing technology in improving the level of sports, especially as a secondary means of training, is playing an essential role. In the field of sports, the scientific control of computer of the sports training process and many other factors provides possibilities and the necessary in technical support for exercise training. © 2015 Taylor & Francis Group, London.


Tan B.,Hunan Mechanical and Electrical Polytechnic
WIT Transactions on Information and Communication Technologies | Year: 2014

Financial management system is that financial management related factors are combined to achieve financial goals under the opportunities and constraints which are provided by the external environment. Build the financial management system by system analysis and optimization design. © 2014 WIT Press.


Li Z.,Hunan Mechanical and Electrical Polytechnic
WIT Transactions on Information and Communication Technologies | Year: 2014

Nowadays the parallel computer system plays the important part in the scientific engineering research; this paper has conducted the detailed analysis research on the parallel computer system's unique feature and the key fault-tolerant technology and has carried on the detailed introduction to its performance superiority. © 2014 WIT Press.


Li Z.,Hunan Mechanical and Electrical Polytechnic
WIT Transactions on Information and Communication Technologies | Year: 2014

The distributed computer system was a computer in practical application domain important form, this article has carried on the brief introduction to the distributed computer system structure and the constituent, analyzed it to be opposite with other ordinary computer system superiority, finally has conducted the thorough analysis research on the distributed computer system's practical application situation. © 2014 WIT Press.


Chen J.,Hunan Mechanical and Electrical Polytechnic
WIT Transactions on Information and Communication Technologies | Year: 2014

The Internet of things (IOT) technology is the most cutting-edge technology of informationization and intelligence, which can achieve the exchange of information between persons and things and between things. It has greatly enriched the research and application of network technology. This paper describes the development of the Internet of things technology as well as its application in the country and puts forward views and conjectures on development prospects of the Internet of things technology in the coming years. © 2014 WIT Press.


Wu Y.,Hunan Mechanical and Electrical Polytechnic
WIT Transactions on Information and Communication Technologies | Year: 2014

In the network security construction, involves all aspects of technology and data in construction need to study the problem of network security, network intrusion way has the diversity. This paper puts forward a data mining technology of network security incident prediction model. The network security incident chaos analysis, and then carry on the phase space reconstruction, restore network security incident change track, the third using data mining algorithm on the forecast. Network intrusion detection system for real-time demand is higher. And the network intrusion detection system in detection speed is slow, detection accuracy rate is low, cannot adapt to the development of network intrusion detection. And in the construction of network security require some key technology to network memory real-time monitoring and analysis. In order to guarantee the network security, the network intrusion detection system for building and simulation. The simulation results show that the principle of artificial immune network intrusion detection system to speed up the network intrusion detection speed, improve the intrusion detection accuracy, effectively reduce the invasion, fail to network intrusion detection provides a new testing tool. The phase space reconstruction, restore network security incident change track, the third using data mining algorithm on the forecast. The simulation results show that this method could improve the network security incident the prediction accuracy, to solve the traditional prediction model is difficult to chaotic characteristics of accurate analysis problem; the network security risk prevention has important reference value. © 2014 WIT Press.


Yun L.L.,Hunan Mechanical and Electrical Polytechnic
Advanced Materials Research | Year: 2014

Suspension and steering systems are the two important subsystems of the vehicle chassis, and the two are not independent of each other, but are closely linked, so the coupling relationships between the two need to be considered to make the integrated control. Based on the tire force, dynamic load distribution, coupling movement relations, and coupling its structure and control parameters, a dynamic model of tire and suspension control system for is built to provide a model basis and research base for the study of the vehicle chassis system control. © (2014) Trans Tech Publications, Switzerland.

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