First Engineers Scientific Research Institute

Wuxi, China

First Engineers Scientific Research Institute

Wuxi, China
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Zhang S.-R.,First Engineers Scientific Research Institute | Xu Y.-Q.,First Engineers Scientific Research Institute | Zhou X.-J.,First Engineers Scientific Research Institute | Hui Y.,First Engineers Scientific Research Institute | Zhu X.-W.,First Engineers Scientific Research Institute
ICALIP 2016 - 2016 International Conference on Audio, Language and Image Processing - Proceedings | Year: 2016

The paper does study on event extraction from news on the internet by the method of semantic role analysis. We annotate the sentence in the news from argument annotator, extract the argument structure of the head verb, convert the arguments to specific semantic roles of the verb, and then match the semantic roles to the event elements. This paper puts forward and studies on how to use VerbNet and SemLink resources to match the verb's arguments and event elements. The experiment was carried out on the 1000 news corpus crawled from the web, and the result shows that the F value is up to 70.6% and has certain application value. © 2016 IEEE.


Zhou W.,First Engineers Scientific Research Institute | Xie W.,First Engineers Scientific Research Institute | Cao X.,First Engineers Scientific Research Institute | Wu C.,First Engineers Scientific Research Institute | Zhu S.,First Engineers Scientific Research Institute
International Conference on Signal Processing Proceedings, ICSP | Year: 2017

A novel approach of Doppler spectrum reconstruction based on iterative adaptive algorithm (IAA) for Multi-Input Multi-Output Synthetic Aperture Radar (MIMO SAR) is proposed. Firstly, the mathematical representation of the ambiguous Doppler spectrum is established, and the relationships of the Doppler signals among different transmit-receive pairs are derived. Based on the derivation aforementioned, a detailed procedure of the IAA for Doppler spectrum reconstruction is presented, and the fundamental explanation of the proposed algorithm is given based on the subspace theory. Lastly, the validity is demonstrated by numerical simulations. © 2016 IEEE.


Ban G.-D.,LEU | Liu Z.-H.,LEU | Ye S.-T.,First Engineers Scientific Research Institute | Yang H.-B.,LEU | And 2 more authors.
RSC Advances | Year: 2017

Carbon fiber radar absorbing coatings (CFRACs), composed of different amounts of carbon fiber (CF) embedded in polyurethane resin, were prepared using water-based technologies. The microstructures and properties of the coatings were characterized by means of scanning electron microscopy, differential scanning calorimetry, Fourier infrared spectrometry, X-ray diffraction analysis, and vector network analysis. Our results show that with an increase in CF content and thickness of coating, the peak reflection of the CFRAC moved in the low frequency direction. When the CF content was 0.8 wt% and the thickness of the coating was 1.2 mm, the maximum reflection losses of the coatings were -11.01 dB over the frequency range of 8-18 GHz, with a less than -10 dB (over 90% microwave absorption) bandwidth of nearly 4.2 GHz and a coating density of 1.02 kg m-2. The results indicated that CFRACs could be a potential microwave absorbing material used over the frequency range of 8-18 GHz. © 2017 The Royal Society of Chemistry.


Ma Y.,National University of Defense Technology | Cheng W.,First Engineers Scientific Research Institute | Shen X.,First Engineers Scientific Research Institute
2016 2nd IEEE International Conference on Computer and Communications, ICCC 2016 - Proceedings | Year: 2017

This paper addresses the problem of relay selection and power allocation in a device-to-device (D2D) communication underlaying heterogeneous cellular network. For the femto user equipments (FUEs) relay selection, two novel relay selection metrics are derived, which take both the intra-tier and cross-tier interferences into account. Based on the proposed metrics, centralized and distributed methods with low complexity are proposed. Finally, to maximize the coverage probability of macro user equip ment (MUE), the optimal power allocation in MUE's two-hop link is obtained. Simulation results show that the proposed relay selection schemes outperform traditional max-min scheme, and the performance of the optimal power scheme is verified. © 2016 IEEE.


Sun P.,First Engineers Scientific Research Institute
2nd International Conference on Information Engineering and Computer Science - Proceedings, ICIECS 2010 | Year: 2010

The dynamics of a small solid launch vehicle has been investigated. This launcher consists of a liquid upper stage and three fundamental solid rocket boosters aligned in series. During the ascent flight phase, lateral jets and grid fins are adopted by the flight control system to stable the attitude of the launcher. The launcher is a slender and aerodynamically unstable vehicle with sloshing tanks. A complete set of six-degrees-of-freedom dynamic models of the launcher, incorporation its rigid body, aerodynamics, gravity, sloshing, mass change, actuator, and elastic body, is developed. Dynamic analysis results of the structural modes and the bifurcation locus are calculated on the basis of the presented models. This complete set of dynamic models can further be used in flight control system design. ©2010 IEEE.


Li H.,First Engineers Scientific Research Institute | Sheng D.,First Engineers Scientific Research Institute | Wang B.,First Engineers Scientific Research Institute | Zhong X.,First Engineers Scientific Research Institute
2015 IEEE 12th International Conference on Electronic Measurement and Instruments, ICEMI 2015 | Year: 2016

Using wireless sensor network to carry out status monitoring for floating bridge structure will improve the reliability and effectiveness of monitoring system greatly. To solve power supply problem of the network nodes, this paper designs a kind of self-sustaining piezoelectric power supply. It converts the mechanical energy which produced in the floating bridge's work environment into vibration excitation source, so as to extend the load's continuous effect and correspondingly extend the power supply time; Applly ANSYS to carry out dynamic power generation characteristics simulation analysis of self-sustaining piezoelectric structure, make qualitative analysis on the effect principle of the relevant parameters on the power generation characteristics. Then built Maxite hammer machine test system to simulate the impact test. The research results show that the new power supply is able to collect the impact energy efficiently, and improve the electromechanical conversion efficiency greatly. © 2015 IEEE.


Li H.,First Engineers Scientific Research Institute | Sheng D.,First Engineers Scientific Research Institute | Biao W.,First Engineers Scientific Research Institute | Bing H.,First Engineers Scientific Research Institute
2015 IEEE 12th International Conference on Electronic Measurement and Instruments, ICEMI 2015 | Year: 2016

To solve generator problem of the sensor nodes for floating bridge monitoring system, design a kind of self-sustaining circular sheet piezoelectric generator. Its most important feature is the use of a self-sustaining circular sheet piezoelectric structure, it converts the mechanical energy into vibration excitation source, so as to extend the load's continuous effect and correspondingly extend the generator time; Describe its operating principles, the output electricity energy increases when piezoelectric circular sheet becomes resonance. In order to test and analyze the electrical generation performance of self-sustaining piezoelectric generator, built the measuring platform based on vibration exciter to simulate vibration test, in the design of this measuring platform, displacement sensor is used to measure the amplitude of piezoelectric circular sheet, charge amplifier is used to measure the electricity quantity generated by piezoelectric circular sheet, and the test result shows that increase the exciter load and work under the natural working frequency of piezoelectric circular sheet will increase the generating capacity of self-sustaining circular sheet piezoelectric generator. © 2015 IEEE.


Li H.,First Engineers Scientific Research Institute | Shi X.,First Engineers Scientific Research Institute | Lin K.,First Engineers Scientific Research Institute | Yu H.,First Engineers Scientific Research Institute
2016 IEEE/ACIS 17th International Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing, SNPD 2016 | Year: 2016

The problems come from ESD become more and more serious. To evaluate the capability of ESD protection of materials entirely, design a multi-function electrostatic charge decay intelligent test instrument based on single chip compute. It adopts a new kind of efficient electrostatic decay time test scheme, so as to satisfy test condition that different materials have the same initial and terminal potential, and make test results not influenced by Cross-Over effect. Then introduce the system composition and operating principle of intelligent test instrument, and describe the specific software design method from man-machine interaction function, electrostatic potential measurement function and decay time calculation function, finally perform charging method test research with designed intelligent test instrument and analyze the test results. © 2016 IEEE.


Sun P.,First Engineers Scientific Research Institute | Wang W.,First Engineers Scientific Research Institute
Proceedings - 3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011 | Year: 2011

For the severe nonlinearity and time-varied problems of controlled object existed in mine sweeping plough electro-hydraulic servo system of a weapon, this paper presents a discrete-time sliding mode control technique using fast output sampling. Fast output sampling enables arbitrary sliding mode design and an equivalent fast output feedback control. In practice the system states needed in the sliding mode method are sometimes difficult to obtain. FOS method, which makes use of only the output samples, is combined with sliding mode method to accommodate the incomplete system state information. Thus, the control approach is more practical and easy to implement. The method and its stabilization are examined under numerical simulations and the results show that the proposed method produces excellent results and multimodel robust stabilization is achieved. © 2011 IEEE.


Qian H.,First Engineers Scientific Research Institute | Sun P.,First Engineers Scientific Research Institute | Rong Y.,First Engineers Scientific Research Institute
Energy Procedia | Year: 2011

A growing demand for deployment of autonomous battlefield sensors and sensor networks is leading to a subsequent increase in the demand for localized, independent energy harvesting capabilities for each node. In this paper, several methods of energy harvesting are summarized. By utilizing energy form the surroundings, small amounts of power can be harvested from wind, solar radiation and stress sources. Energy harvested is converted to battery potential via a converter. Operation flowchart of the system is presented. Meanwhile, an algorithm for the sensor network to adaptively learn its energy environment has been studied. Schemes summarized in this paper can be of guidance for design and utilize energy harvest systems on the battlefield network sensor nodes. © 2011 Published by Elsevier B.V. Selection and/or peer-review under responsibility of International Materials Science Society.

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