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A distributed decision method for missiles autonomous formation based on potential game

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Journal of Systems Engineering and Electronics 2019年第4期30卷 738-748页

作者： JIA Xiang WU Sentang WEN Yongming YAO Zheng Beijing Institute of Electronic Engineering Beijing 100854China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

The distributed cooperative decision problems of missiles autonomous formation with network packet loss are investigated by using the potential game based on formation principles.In particular,a dynamic target allocation method for missiles formation is provided based on the potential game and formation principles,after the introduction of cooperative guidance and control system of the missiles formation.Then we seek the optimization of a global utility function through autonomous missiles that are capable of making individually rational decisions to optimize their own utility functions.The first important aspect of the problem is to design an individual utility function considering the characteristics of the missiles formation,with which the objective of the missiles are localized to each missile yet aligned with the global utility function.The second is to equip the missiles with an appropriate coordination mechanism with each missile pursuing the optimization of its own utility function.We present the design procedure for the utility,and present a coordination mechanism based on spatial adaptive play and then introduce the idea of“cyclical selected spatial adaptive play”and“negotiation based on time division multiple address(TDMA)protocol formation support network”.Finally,we present simulations for the distributed dynamic target allocation on the comprehensive digital simulation system,and the results illustrate the effectiveness and engineering applicability of the method.

关键词： distributed decision dynamic target allocation missiles autonomous formation potential game

MAV/UAV task coalition phased-formation method

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Journal of Systems Engineering and Electronics 2019年第2期30卷 402-414页

作者： JIAO Zhiqiang YAO Peiyang ZHANG Jieyong ZHONG Yun WANG Xun Information and Navigation College Air Force Engineering University

The formation of the manned aerial vehicle/unmanned aerial vehicle(MAV/UAV) task coalition is considered. To reduce the scale of the problem, the formation progress is divided into three phases. For the task clustering phase, the geographical position of tasks is taken into consideration and a cluster method is proposed. For the UAV allocation phase, the UAV requirement for both constrained and unconstrained resources is introduced, and a multi-objective optimal algorithm is proposed to solve the allocation problem. For the MAV allocation phase, the optimal model is firstly constructed and it is decomposed according to the ideal of greed to reduce the time complexity of the algorithm. Based on the above phases, the MAV/UAV task coalition formation method is proposed and the effectiveness and practicability are demonstrated by simulation examples.

关键词： task coalition formation task clustering unmanned aerial vehicle (UAV) allocation manned aerial vehicle (MAV) allocation

Spatial distribution of bolls affects yield formation in different genotypes of Bt cotton varieties

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Journal of Integrative Agriculture 2019年第11期18卷 2492-2504页

作者： NIE Jun-jun YUAN Yan-chao QIN Du-lin LIU Yan-hui WANG Shuang-lei LI Jin-pu ZHANG Mei-ling ZHAO Na GUO Wen-jun QI Jie MAO Li-li SONG Xian-liang SUN Xue-zhen State Key Laboratory of Crop Biology Ministry of Science and Technology/College of AgronomyShandong Agricultural UniversityTai’an 271018P.R.China Technical Guidance Station of Cotton Production in Shandong Province Jinan 250013P.R.China Qufu Agricultural Bureau Qufu 273100P.R.China Yantai Agricultural Technology Extension Service Yantai 264000P.R.China Seed Management Department of Pingdingshan Pingdingshan 467000P.R.China Shanghai Center for Plant Stress Biology Chinese Academy of SciencesShanghai 201602P.R.China

To optimize the spatial distribution of cotton bolls and to increase the yield,the relationship between yield components and boll spatial distribution was investigated among different Bt(Bacillus thuringensis)cotton varieties.A five-year field experiment was conducted to reveal the reasons for the differences in lint yield and fiber quality across three Bt cotton varieties with different yield formations from 2013 to 2017.The lint yield of Jiman 169(the average yield from 2013-2017 was 42.2 g/plant)was the highest,i.e.,16.3 and 36.9%higher than Lumianyan 21(L21)and Daizimian 99B(99B),respectively.And the differences in boll weight among the three cultivars were similar to the lint yield,while the others yield components were not.So the increase in lint yield was mainly attributed to the enlargement in boll weight.However,the change in fiber quality was inconsistent with the lint yield,and the quality of L21 was significantly better than that of Jimian 169(J169)and 99B,which was caused by the diversity of boll spatial distribution.Compared with 99B,the loose-type J169 had the highest number of large bolls in inner positions;the tight-type L21 had a few large bolls and the highest number of lower and middle bolls.And approximately 80.72%of the lint yield was concentrated on the inner nodes in Jiman 169,compared with 77.44%of L21 and 66.73%of 99B during the five-year experiment.Although lint yield was significantly affected by the interannual changes,the lint yield of J169 was the highest and the most stable,as well as its yield components.These observations demonstrated the increase in lint yield was due to the increase in boll weight,and the large bolls and high fiber quality were attributed to the optimal distribution of bolls within the canopies.

关键词： Bt cotton yield formation boll spatial distribution lint yield fiber quality

EAM APPROACH TO ENTHALPY OF formation OF ALKALI METAL ALLOYS

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中国有色金属学会会刊：英文版 1996年第4期6卷 52-56页

作者： Zhang Bangwei Ouyang Yifang Liao Shuzhi Jin Zhanpeng1 (International Centre for Materials Physics,Shenyang 110015)2 (Department of physics,Hunan University, Changsha 410082)3 (Department of Materials Science and Engineering,Central South University of Tec International Centre for Materials Physics Shenyang 110015 China Department of Physics Hunan University Changsha 410082 China Department of Materials Science and Engineering Central South University of Technology Changsha 410083 China Department of Chemistry and Chemical Engineering Hunan University Changsha 410082 China

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关键词： EAM approach enthalpy of formation alkali metal alloys

Determinations of combustion and formation enthalpies of C_(60)and C_(70)

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Science China Chemistry 1998年第5期41卷 543-548页

作者：安绪武陈斌何俊 Institute of Chemistry Chinese Academy of Sciences Beijing China

By using a micro\|bomb calorimeter, the standard enthalpies of combustion of C 60 and C 70 have been determined to be -(25 947.1±8.5) and -(29 956.1±8.9) kJ/mol respectively. A g.l.c. analysis indicated that the amounts of residual organic solvents in the samples were very small, and their effects on the final results were negligible. The energy of combustion of C 60 determined in this work is in agreement in the uncertainty interval with that determined by means of traditional calorimeter using macro amount of sample. The enthalpies of formation of these two substances have been derived. The strain energies in the molecules of C 60 and C 70 were estimated by a bond energy scheme and by using corannulene as the model compound, the results estimated from different methods are very close.

关键词： C 60 C 70 enthalpy of combustion enthalpy of formation molecular strain energy.

Internal modification in transparent hybrid germanium-silica plates using plasma formation induced by a femtosecond laser

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中国有色金属学会会刊：英文版 2012年第S3期22卷 808-812页

作者： Ji-Wook YOON Jung-Kyu PARK Kwang-Ho KIM Myung-Chang KANG Sung-Hak CHO Nano Machining Laboratory Korea Institute of Machinery and Materials Department of Nano-Mechatronics University of Science and Technology National Core Research Center for Hybrid Materials Solution Pusan National University

The fabrication of an internal diffraction grating with photoinduced refractive index modification in planar hybrid germanium-silica plates was demonstrated using low-density plasma formation excited by a high-intensity femtosecond (150 fs) Ti:sapphire laser (λp=790 nm).The refractive index modifications with diameters ranging from 400 nm to 3 μm were photoinduced after plasma formation occurred upon irradiation with peak intensities of more than 2×1013 W/cm2.The graded refractive index profile was fabricated to be a symmetric around from the center of the point at which low-density plasma occurred.

关键词： diffraction grating refractive index modification plasma formation hybrid germanium-silica plate femtosecond laser

formation AGE AND PROCESS OF HEILUSOL IN THE LONGDONG LOESS PLATEAU

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Chinese Science Bulletin 1990年第5期35卷 407-412页

作者：张维祥胡双熙 Department of Geography Lanzhou University Lanzhou 730000 PRC

In recent years, we have taken the Longdong Loess Plateau in Gansu Province as the research region, which is located to the east of the Liupan Mountains and is a typical area for heilusol development. Selecting some typical profiles in the area such as Miaotou profile(L) in Lingtai County, Dazhai profile(P)in Pingliang County, Jiuxian profile(N) in Ningxian County, Houguanzhai profile(X)in Xifeng City, Beiyuantou

关键词： heilusol developmental stage formation process overburden layer.

Diagenetic fluids evolution and genetic mechanism of tight sandstone gas reservoirs in Upper Triassic Xujiahe formation in Sichuan Basin, China

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Science China Earth Sciences 2008年第9期51卷 1340-1353页

作者： ZHU RuKai ZOU CaiNeng ZHANG Nai WANG XueSong CHENG Rong LIU LiuHong ZHOU ChuanMin SONG LiHong Research Institute of Petroleum Exploration and Development PetroChinaBeijing 100083China PetroChina Southwest Oil&Gas Field Company Luzhou 646001China

The reservoirs of the Upper Triassic Xujiahe formation in Sichuan Basin have the characteristics of low compositional maturity, low contents of cements and medium textural maturity. The general physical properties of the reservoirs are poor, with low porosity and low permeability, and there are only a few reservoirs with medium porosity and low permeability in local areas. Based on the diagenetic mineral association, a diagenetic sequence of cements is established: early calcites (or micrite siderites) →first quartz overgrowth→chlorite coatings→dissolution of feldspars and debris→chlorite linings→ second quartz overgrowth (quartz widen or filled in remain intergranular pores and solution pores)→dissolution→third quartz overgrowth (quartz filled in intergranular and intragranular solution pores)→intergrowth (ferro) calcites→dolomites→ferro (calcites) dolomites→later dissolution→veins of quartz and calcites formation. Mechanical compaction is the main factor in making the reservoirs tight in the basin, followed by the second and third quartz overgrowth. In a long-term closed system, only feld-spars and some lithic fragments are dissolved by diagenetic fluids, while intergranular cements such as quartz and calcit are not dissolved and thus have little influence on the porosity of the Xujiahe formation. This is the third factor that may have kept the sandstones of Xujiahe formation tight finally. The hydrocarbon was extensively generated from organic materials after the second quartz overgrowth, and selectively entered favorable reservoirs to form tight sandstone gas reservoirs.

关键词： diagenetic fluids tight reservoirs Xujiahe formation Sichuan Basin inclusions

The formation of compact groups of galaxies

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Science China Mathematics 1999年第10期42卷 1089-1095页

作者：马駬俞允强 National Astronomical Observatory Chinese Academy of Sciences Beijing China Beijing Astrophysics Center Chinese Academy of Sciences and Peking University Beijing China Physics Department Peking University Beijing China

In the compact group of galaxies the galaxies can merge into a few massive ones in a very short time, so they must be formed very recently. On the other hand, according to the theory of structure formation, the denser system should form earlier. By analyzing the apparent paradox, we suggest that the merging process of CDM halo plays an important role in the formation of the compact groups of galaxies: it delays the formation of compact groups of galaxies, and makes the groups of galaxies much denser.

关键词： structure formation compact group of galaxies merging of galaxies.