Luoyang Electrical Equipment Test Center

Luoyang, China

Luoyang Electrical Equipment Test Center

Luoyang, China
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Guang P.,Northwestern Polytechnical University | Fu Z.,Northwestern Polytechnical University | Xie L.,Northwestern Polytechnical University | Zhao W.,Luoyang Electrical Equipment Test Center
2016 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA 2016 | Year: 2016

Crosstalk cancellation is an important issue in loudspeaker-based virtual auditory. Most of the correlated researches focus on far-field situation. This paper addresses near-field crosstalk cancellation problem, which has more challenges and seldom been addressed. Firstly loudspeaker can no longer be modeled as point source so that the head related transfer functions (HRTF) is very difficult to measure and the crosstalk problem is more complicated. Secondly any tiny user's head movement can not be neglected. In this paper, we use the boundary element calculation method with a scanned dummy-head (BHead210) model to obtain near-field HRTF data. Then by simulating loudspeaker as a combination of multiple synchronized point sources and considering possible head-position biases, a robust crosstalk cancellation method based on least square error is proposed. We evaluate the cancellation performance on system condition number, dynamic range loss and channel separation factor. The simulation results conclude that the proposed method is more suitable in near-field crosstalk cancellation task. © 2016 Asia Pacific Signal and Information Processing Association.


Zhang C.,Luoyang Electrical Equipment Test Center | Chang W.,Academy of Equipment Command and Technology | Liu J.,Luoyang Electrical Equipment Test Center | Li Y.,Luoyang Electrical Equipment Test Center
Proceedings of 2016 IEEE Information Technology, Networking, Electronic and Automation Control Conference, ITNEC 2016 | Year: 2016

In view of the traditional communication system scheme selection methods are difficult to deal with the issue of inconsistent indicators dimension. This paper puts forward the fuzzy modified DEA evaluation model. First, the communication system evaluation index system model was established. Then DEA evaluation model was founded, meanwhile the introduction of input 'preferences' and the introduction of fuzzy membership degree the output fuzzy correction. Finial, simulation results show that the model evaluation result not only have the objectivity assessment of communication system scheme, but also reflect the decision maker's subjective assessment. The model for optimization of communication system schemes provides a sensible solution. © 2016 IEEE.


Huang C.,Luoyang Electrical Equipment Test Center | Wu J.,Luoyang Electrical Equipment Test Center | Chen Q.,Luoyang Electrical Equipment Test Center | Guo H.,Luoyang Electrical Equipment Test Center | And 2 more authors.
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2013

The IR/MMW terminal combined guidance missile, such as terminal-sensitive submunition, has been used widely on the war field. It is difficult to evaluate operational effectiveness with ball firing of terminal-sensitive submunition attacking armored forces. The movement model of terminal-sensitive submunition operate, such as ballistic model etc. was established. The attack state of terminal-sensitive submunition aiming at armored forces was constructed. The simulation test was used to evaluate hitting probability of terminal-sensitive submunition to armored forces. The operational effectiveness of terminal-sensitive submunition was evaluated also by simulation test. The simulation result demonstrates that the terminal-sensitive submunition has been the severe threat for armored forces.


Zhang C.,Luoyang Electrical Equipment Test Center | Cheng Y.,Luoyang Electrical Equipment Test Center | He Z.,Luoyang Electrical Equipment Test Center | He R.,Luoyang Electrical Equipment Test Center
Chinese Control Conference, CCC | Year: 2016

In view of the traditional methods of the air combat threat evaluation are difficult to combined with the develop trend of the total air combat situation. Therefore, a method of dynamic air combat threat evaluation based on time series is presented. Firstly, a new theoretical framework for the dynamic air combat threat evaluation is presented, and the index system of the dynamic air combat threat evaluation is established. Then, the time series weights of selected air combat information are gained by the exponential distribution method, and the dynamic decision matrix is determined in line with the collected succession and newest air combat information, and the target attribute weights are solved by cross-entropy method. Finally, a mathematical model of the dynamic air combat threat evaluation is established. And the simulation indicates that the method is scientific and reasonable, but also the evaluation results more convincing compare to the traditional threat evaluation methods. © 2016 TCCT.

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