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A Multi-UCAV cooperative occupation method based on weapon engagement zones for beyond-visual-range air combat

Defence Technology（防务技术） 2022年第6期18卷 1006-1022页

作者： Wei-hua Li jing-ping Shi Yun-yan Wu Yue-ping Wang Yong-xi Lyu School of Automation Northwestern Polytechnical UniversityXi'an710129China Shaanxi Province Key Laboratory of Flight Control and Simulation Technology Xi'an710129China Science and Technology on Aircraft Control Laboratory FACRIXi'an710065China

Recent advances in on-board radar and missile capabilities,combined with individual payload limitations,have led to increased interest in the use of unmanned combat aerial vehicles(UCAVs)for cooperative occupation during beyond-visual-range(BVR)air ***,prior research on occupational decision-making in BVR air combat has mostly been limited to one-on-one *** such,this study presents a practical cooperative occupation decision-making methodology for use with multiple *** weapon engagement zone(WEZ)and combat geometry were first used to develop an advantage function for situational assessment of one-on-one *** encircling advantage function was then designed to represent the cooperation of UCAVs,thereby establishing a cooperative occupation *** corresponding objective function was derived from the one-on-one engagement advantage function and the encircling advantage *** resulting model exhibited similarities to a mixed-integer nonlinear programming(MINLP)*** such,an improved discrete particle swarm optimization(DPSO)algorithm was used to identify a *** occupation process was then converted into a formation switching task as part of the cooperative occupation model.A series of simulations were conducted to verify occupational solutions in varying situations,including two-on-two *** results showed these solutions varied with initial conditions and weighting *** occupation process,based on formation switching,effectively demonstrates the viability of the proposed *** cooperative occupation results could provide a theoretical framework for subsequent research in cooperative BVR air combat.

关键词： Unmanned combat aerial vehicle Cooperative occupation Beyond-visual-range air combat Weapon engagement zone Discrete particle swarm optimization Formation switching

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Degree of polarization based on the three-component pBRDF model for metallic materials

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Chinese Physics B 2017年第2期26卷 254-259页

作者： Kai Wang jing-ping Zhu Hong Liu Key Laboratory for Physical Electronics and Devices of the Ministry of Education and Shaanxi Key Laboratory of Information Photonic Technique Xi＇ an liaotong University Xi＇ an 710049 China The State Key Laboratory of Astronautic Dynamics Xi＇an Satellite Control Center Xi ＇an 710043 China

An expression of degree of polarization（DOP） for metallic material is presented based on the three-component polarized bidirectional reflectance distribution function（p BRDF） model with considering specular reflection, directional diffuse reflection and ideal diffuse reflection. The three-component p BRDF model with a detailed reflection assumption is validated by comparing simulations with measurements. The DOP expression presented in this paper is related to surface roughness, which makes it more reasonable in physics. Test results for two metallic samples show that the DOP based on the three-component p BRDF model accords well with the measurement and the error of existing DOP expression is significantly reduced by introducing the diffuse reflection. It indicates that our DOP expression describes the polarized reflection properties of metallic surfaces more accurately.

关键词： degree of polarization(DOP) polarized bidirectional reflectance distribution function(pBRDF) metallic materials

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Semi-analytical Formula for Pricing Bilateral Counterparty Risk of CDS with Correlated Credit Risks

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Acta Mathematicae Applicatae Sinica 2018年第2期34卷 209-236页

作者： Feng LIN Si-yuan XIE jing-ping YANG LMEQF Department of Financial Mathematics Peking University

Based on the framework of [7], we discuss pricing bilateral counterparty risk of CDS, where each individual default intensity is modeled by a shifted CIR process with jump （3CIR＋＋）, and the correlation between the default times is modeled by a copula function. We present a semi-analytical formula for pricing bilateral counterparty risk of CDS, which is more convenient to compute through calculating multiple numerical integration or using Monte-Carlo simulation without simulating default times. Moreover, we obtain simpler formulae under FGM copulas, Bernstein copulas and CA＇B copulas, which can be applied for speeding up the computation and reducing the pricing error. Numerical results under FGM copulas and CA＇B copulas show that our method performs better both in computation speed and accuracy.

关键词： bilateral counterparty risk CDS JCIR++ copula function semi-analytical formula

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Framed slotted ALOHA with grouping tactic and binary selection for anti-collision in RFID systems

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The Journal of China Universities of Posts and Telecommunications 2009年第4期16卷 47-52页

作者： WANG Ya-qi JIANG Guo-ping WANG jing Center for Control and Intelligence Technology Nanjing University of Posts and Telecommunications Nanjing 210003 China

In radio frequency identification （RFID） systems, tag collision arbitration is a significant issue for fast tag identification. This article proposes a novel tag anti-collision algorithm called framed slotted ALOHA with grouping tactic and binary selection （GB-FSA）. The novelty of GB-FSA algorithm is that the reader uses binary tree algorithm to identify the tags according to the collided slot counters information. Furthermore, to save slots, tags are randomly divided into several groups based on the number of collided binary bits in the identification codes （IDs） of tags, and then only the number of the first group of tags is estimated. Performance analysis and simulation results show that the GB-FSA algorithm improves the identification efficiency by 9.9%-16.3% compared to other ALOHA-based tag anti-collision algorithms when the number of tags is 1000.

关键词： RFID anti-collision binary tree identification efficiency

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Correlation of anaerobic ammonium oxidation and denitrification

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Journal of Environmental Sciences 2006年第2期18卷 227-231页

作者： ZHU jing-ping HU Yong-you LIANG Hui-qiang College of Environmental Science and Engineering South China University of Technology Guangzhou 510640 China College of Environment and Resources Engineering Southwest University Science and Technology Mianyang 621002 China

The feasibility of the nitrous organic wastewater treated was studied in seven anaerobic sequencing batch reactors（ASBRs）（0^#-6^#） which had been run under stable anaerobic ammonium oxidation （Anammox）. By means of monitoring and data analysis of COD, NH4^#-N, NO2^--N, NO3^--N and pH, and of microbial test, the results revealed that the optimal Anammox performance was achieved from 2^# reactor in which COD/NH4^＋ -N was 1.65, Anammox bacteria and denitrification bacteria could coexist, and Anammox reaction and denitrification reaction could occur simultaneously in the reactors. The ratio of NH4^＋-N consumed ： NO2^- -N consumed ： NO3^- -N produced was 1：1.38：0.19 in 0^# reactor which was not added glucose in the wastewater. When different ratio of COD and NH4^＋-N was fed for the reactors, the ratio of NO2^- -N consumed： NH4^＋-N consumed was in the range of 1.51-2.29 and the ratio of NO;-N produced： NH4^＋ -N consumed in the range of 0 -0.05.

关键词： anaerobic ammonium oxidation (Anammox) anaerobic sequencing batch reactor (ASBR) biological denitrification denitrification

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TBAF-catalyzed cyclization of 6-hydroxyhex-2-ynoates and 7-hydroxyhept-2-ynoates

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Chinese Chemical Letters 2011年第8期22卷 931-934页

作者： Xiao Qing Wang ping jing Jia Su ping Liu Wei Yu State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 China

Tetrabutyl ammonium fluoride（TBAF） was found to be capable of catalyzing the intramolecular hydroalkoxylation of 6- hydroxyhex-2-ynoates and *** reaction could be used to prepare 2,5-substituted THF rings and 2,6- s... 详细信息

关键词： Tetrabutyl ammonium fluoride Et_3SiH Tetrahydrofuran Tetrahydropyran

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PROMOTION EFFECT OF MELAMINE ON FLAME RETARDANCY OF EPOXY RESINS CONTAINING CAGED BICYCLIC PHOSPHATE

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Chinese Journal of Polymer Science 2007年第6期25卷 581-588页

作者： jing-ping Hu Dao Li Yan Qin Xing-yi Wang Laboratory for Advanced Materials Research Institute of Industrial Catalysis East China University of Science ＆ Technology Shanghai 200237 China

Caged bicyclic phosphate （CBP） and its dimelamine salt （PDS） were synthesized and added to epoxy resins to obtain the flame retarded epoxy resin composites. The flammability of the composites was characterized by the limiting oxygen index （LOI） and cone calorimeter tests. The LOI values of flame retarded composites increase consistently with the increase of flame retardant amounts, and they are almost the same when the loading of CBP is the same as that of PDS, although the phosphorus content of PDS is much lower than that of CBP. The total heat release increases in the order of CBP30/ER 〈 PDS30/ER 〈 PDS15/ER 〈 CBPI5/ER, whereas that of specific extinction area is CBP15/ER 〉 CBP30/ER 〉 PDS30/ER ≌ PDS15/ER. PDS exhibits more effective inhibition of oxidation of combustible gases. In the tests of thermogravimetric analyses （TG） and Fourier transform infrared spectroscopy （FT-IR）, it is found that the degradation of the composites is influenced greatly by the addition of flame retardants. By scanning electron microscopy （SEM）, a thick and tight char-layer is observed for PDS30/ER, resulting from the interaction of nitrogen species with phosphorus species. Therefore, the combination of CBP with melamine in the flame retarded system can improve the flame retardancy greatly.

关键词： Flame retardancy Thermal degradation Melamine Caged bicyclic phosphate Epoxy resin.

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Hybrid Tungstocuprate [Cu(2,2′-bpy)_3]_2H_4[CuW_(12)O_(40)]·6H_2O Based on Keggin Polyoxoanion [CuW_(12)O_(40)]^(6-) with Cu~Ⅱas Heteroatom

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Chemical Research in Chinese Universities 2007年第3期23卷 263-267页

作者： WANG jing-ping MA Peng-tao LI Jie NIU jing-yang Institute of Molecular and Crystal Engineering School of Chemistry and Chemical Engineering Henan University Kaifeng 475001 P. R. China

A novel hybrid tungstocuprate （ Ⅱ ） [ Cu （2,2＇-bpy） 3 ] 2 H4 [ CuW12O40 ] · 6H2O （ 2,2＇-bpy = 2,2＇-bipyfidine） was synthesized via hydrothermal method and characterized using elemental analyses, IR, UV, XPS, TG-DSC, EPR, and X-ray single crystal diffraction. The structural analysis shows that the complex consists of an unusual Keggin-type polyoxoanion [ CuW12O40 ]^6- and a pair of chiral complex cations [ Cu（2,2＇-bpy） 3 ]^＋ together with four protons and six crystallization water molecules, and the Keggin polyoxoanion is connected with [ Cu （2,2＇-bpy）3 ]^＋v/a multiple C-H…O hydrogen bonds resulting in a dimer.

关键词： Hydrothermal synthesis Polyoxometalates Keggin Tungstocuprate

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Synthesis, Character and Crystal Structure of the Complex {Er(DMSO)_7}PW_(12)O_(40)

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Chinese Journal of Structural Chemistry 2007年第8期26卷 949-954页

作者： HAN Qiu-Xi ZHANG Da-Li MA Jian-Ru WANG jing-ping NIU jing-Yang Institute of Molecular and Crystal Engineering Basic Experiment Teaching Center Henan University Kaifeng 475001 China School of Environment and.Planning Henan University Kaifeng 475001 China School of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China

The synthesis, X-ray crystal structure, thermal properties and electrochemistry of the new complex formulated as {Er（DMSO）7}PW12O40 are reported. The single-crystal X-ray analysis reveals that the crystal crystallizes in the monoclinic system, space group P21/c with a=11.767（2）, b=14.909（3）, c=34.905（7）A, β=98.97（3）°, Mr=3591.33, V=6049（2）A^3, Dc=3.944g/cm^3, Z=4, GOOF=1.098, F（000）=6340, R=0.0490 and wR=0.1202. Crystal structure analysis indicates that the Er（Ⅲ） is seven-coordinate with a distorted pentagonal bipyramid and combines to the anion [PW12O40]3- via static electric force.

关键词： heteropolyanion erbium complex crystal structure

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Hydrothermal Synthesis and Structure Analysis of a Chromium Complex [Cr(aea)]_2(OH)_2(aea =N-(2-Aminoethyl)aspartate)

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Chinese Journal of Structural Chemistry 2008年第2期27卷 225-229页

作者： DANG Dong-Bin JIN Ya-Nan BAI Yan PAN Xiao-jing WANG jing-ping Institute of Molecular and Crystal Engineering School of Chemistryand Chemical Engineering Henan University Kaifeng 475001 China

A dimeric chromium compound has been synthesized by hydrothermal method and characterized by IR, EPR spectra and TG-DTA technique. The title compound [Cr（aea）]2（OH）2 （aea = N-（2-aminoethyl）aspartate） crystallizes in monoclinic, space group P21/c with a = 8.9393（10）, b = 6.7198（7）, c = 14.6791（16） A, β = 91.0580（10）°, V= 881.63（17） A3, Z= 2, Mr = 486.34, De= 1.832 g/cm3, F（000） = 500,μ = 1.296 mm-1, R = 0.0271 and wR = 0.0756. Single-crystal X-ray structural analysis indicates that the title compound consists of two Cr（aea） units linked by two bridging hydroxyl groups. The geometry around each chromium center is approximately octahedral and completed by two hydroxyls and a quadridentate ligand which is formed when ethylenediamine reacts with maleic acid.

关键词： chromium compound hydrothermal synthesis crystal structure

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