Decision-Making for Air Combat Dogfight

基于敌对的两机空战背景,利用不断更新的威胁态势作为飞行员的决策依据,采用影响图分析法描述空战飞行员的决策过程,建立了空战飞行员的决策模型.其特点是空战威胁态势的评估及决策方式易于根据飞行员的经验和偏好进行描述与调整.仿真结果表明,利用所建立的空战决策模型可以有效地导引战机格斗,决策过程符合空战格斗理念.Considering a scenario of air combat involving two opposing fighter aircrafts,a decision-making model for the pilot in air combat is established.The model is based on a situation of continually updated threat.An influence diagram analysis method is employed to describe the pilot decision-making process.Evaluation of air combat threat and the decision-making behavior are easy to describe and modify,if necessary,according to the experience and preference of the individual pilot.Simulation results show that the proposed model is effective to guide the fighter aircraft during air combat dogfight,and its decision-making process conforms to the concept of air combat dogfight.航空科学基金资助项目(02F15001

Analysis of Differential Proteins Between Bursaphelenchus xylophilus and B. mucronatus Using Two Dimensional Polyacryamide Electrophoresis and Mass Spectrometry

松材线虫是造成松树萎蔫病的病原,对松林威胁很大。其近似种拟松材线虫与松材线虫在形态学上极其相似,却不具致病性。所以,松材线虫和拟松材线虫的快速检测至关重要。应用双向电泳联用质谱技术,研究松材线虫和拟松材线虫的蛋白差异,并对差异蛋白进行MAldI-TOf/MS分析以及数据库鉴定,共鉴定了45个差异蛋白,其中松材线虫22个、拟松材线虫23个。不仅为松材线虫和拟松材线虫的准确鉴定打下基础,差异蛋白的进一步研究可望揭示松材线虫的致病机理。The plane-parasitic nematode Bursaphelenchus xylophilus is the causal agent of pine wilt disease,which is the most serious conifer disease in the world.However,it is difficult to differentiate isolates of B.xylophilus from the closely related species B.mucronatus,which is not pathogenic to pine trees.So it is very important to distinguish B.mucronatus from B.xylophilus rapidly.The author applied the two-dimensional electrophoresis and mass spectrometry to study the proteomics of the two nematodes,and had obtained 45 differentiate proteins,22 of which were from B.xylophilus and others were from B.mucronatus.The results supplied new insights into the rapid identification of B.xylophilus the virulence of B.xylophilus.国家自然科学基金“‘检测管’诱引松材线虫的机理研究”(30470234

In situ Time-resolved FTIR and Raman Characterizations of the Partial Oxidation of Methane to Synthesis Gas over Ir/SiO_2 Catalyst

[中文文摘]采用原位时间分辨红外光谱和原位显微Raman光谱技术对Ir/SiO2 上甲烷部分氧化 (POM)制合成气反应的初级产物和反应条件下催化剂表面物种进行了跟踪考察 ,实验结果表明 ,在H2 预还原的新鲜Ir/SiO2 表面 ,CO是V(CH4)∶V(O2 )∶V(Ar) =2∶1∶45混合气反应的初级产物 ,因而甲烷的直接氧化过程是CO生成的主要途径 ;而在稳态反应条件下 ,CO生成的途径可能主要来自CO2 和H2 O与催化剂表面积碳物种 (CHx)和 /或CH4的反应 .催化剂上生成的积碳可能是导致稳态条件下Ir/SiO2 上POM反应机理不同于H2 预还原的新鲜催化剂的主要原因。[英文文摘]In situ time-resolved FTIR and in situ microprobe Raman spectroscopies were used to follow the primary products as well as the surface and gas phase species formed during the reaction of partial oxidation of methane (POM) to synthesis gas over Ir/SiO 2 catalyst. The results suggested that direct oxidation of CH 4 to CO is the dominant pathway of POM reaction over the freshly reduced Ir/SiO 2 catalyst, while the dominant schemes of CO formation over the catalyst under the steady state reaction condition are probably via the reactions of CO2 and H2O with the deposited carbon species (CHx) and/ or CH4 . The mechanistic difference between the POMto synthesis gas over freshly reduced Ir/ SiO2 catalyst and the catalyst under the steady state reaction may have resulted from the formation of significant amount of deposited carbon species in the latter system.国家重点基础研究发展规划 (No.G1999022408); 国家自然科学基金(No.20021002)资助项目

萃余液中微量N_(263)的测定

测定溶液中有机胺的方法,多数是一些有机染料与胺生成有色化合物,用有机试剂萃取后,分光光度法测定。目前国内外常用甲基橙法和百里酚蓝法测定。本体系含镍量高,甲基橙法结果偏低且空白值高。百里酚蓝法稳定时间短。我们从20多种新发色剂中选择了间胺基黄作为发色剂,确定了用间胺基黄测定N_(263)(甲基三烷基氯化铵)的最优条件;化合物的摩尔比为1:1;摩尔吸光系数为1.68×10~4。制定了硫酸镍及钴氨液中微量N_(263)的分光光度法

激波风洞气动力信号分离的波系适配法

加速计惯性补偿是常用的应变天平气动力信号处理方法，在以往的激波风洞测力中发挥了重要作用。然而，该方法存在一些不可避免的问题。首先，加速计采集的是整体位移速率信号，但天平采集的是局部位移引起的应变信号，两者的表现可能并不一致。另外，加速计惯性补偿方法还存在相位差、所有分量补偿困难等问题。本文提出波系适配法，该方法分析天平信号本身，结合振动系统和流场环境，利用全局优化方法，将天平信号分解为气动力信号、振动信号和随机信号。长试验时间激波风洞JF-12 的气动力试验数据分析结果表明，该方法能有效分离振动信号，获取所需的气动力信号