结合二维内蕴模函数和贝叶斯多任务学习的SAR目标识别

为了提高合成孔径雷达（Synthetic Aperture Radar,SAR）目标识别性能，提出了结合二维内蕴模函数（Bidimensional Intrinsic Mode Function,BIMF)与贝叶斯多任务学习的SAR目标识别方法。采用二维经验模态分解获得SAR图像的多层次BIMF，从而更好地描述原始图像的细节信息。为了获得稳健的决策，采用贝叶斯多任务学习对原始SAR图像及其多层次的BIMF进行联合稀疏表示。最后，通过比较各个类别对于测试样本的重构误差判定目标类别。基于MSTAR数据集在多种条件下对提出方法进行了验证实验，结果证明了方法的有效性。     

基于VBS理论的目标敌我属性综合识别方法

在复杂战场环境下,目标敌我属性综合识别的目的是利用多传感器信息融合得 到目标的敌我属性,为指挥员决策提供依据。将VBS（Valuation based Systems）理论应 用 到目标敌我属性综合识别中,建立了层次化的敌我识别VBS网络模型,用来表示传感器变量 及其可信度信息,探讨了VBS网络参数的获取方法。仿真实例证明了VBS理论能够很好地处理 复杂战场条件下的不确定信息,并且该网络模型具有直观有效、推理组合的计算量小等特点 。     

非协同目标识别技术的研究进展

非协同目标识别技术是识别领域研究的新课题,它通过处理侦测到的目标 物理特征来实现对目标身份的识别。该技术可提供更全面、更完善的战场目标信息,有助于 作战人员及时掌握战场态势、减少友军误伤。从目标识别的基础理论开始,介绍了几种适合 非协同目标识别的融合方法及其改进措施,总结了目前非协同目标识别技术研究的主要进展 ,即采用基于统计推理的数据融合技术,对多个传感器侦测的目标特征信息进行处理,实现 了对属性、类型、型号、作战意图及威胁程度等目标信息的判定和分析。同时,指出国外一 些使用数据融合技术的武器装备已具备对多个非协同目标的识别能力和战场信息感知能力。 最后,提出了今后的研究方向。     

贝叶斯推理研究综述

人们生活和工作中遇到的推理和决策问题很多是贝叶斯推理问题,然而,心理学家发现人们推理并不遵循贝叶斯法则。此后心理学家进一步发现人们不遵循贝叶斯定理主要是由于采用了四种非贝叶斯策略:保守主义;基础率忽略;倒转的谬误;联合事件的错误。影响贝叶斯推理的因素主要有:问题表征,问题情境,呈现方式和推理者自身的因素。     

基于特征融合与规则推理的目标识别

为了在干扰电磁环境下提高辐射源和平台目标识别的可靠性,建立了特征级和决策级 的分级融合识别框架,通过特征相关和匹配置信度融合进行辐射源识别,提出了基于粗糙集 规则推理目标识别决策方法。仿真结果表明该方法能增强目标识别的容错性。     

基于多特征参量模糊数据融合的辐射源识别

针对多特征的辐射源识别,采用对辐射源信号特征参数的模糊化表征,建立了多特征、多目标的模糊评价矩阵以及模糊属性综合评判函数,提出了多属性判决函数的融合判决方法进行二次评判的综合识别,从而提高目标识别的准确率和可靠性。仿真结果证实了本文提出方法的有效性。     

一种非组合的电磁目标快速识别算法

针对电磁目标识别算法中辐射源组合的本质是避免同一辐射源的多个可能识别结果同时参与一个目标识别模板的匹配置信度计算的问题,提出了一种非组合的快速电磁目标识别方法。依据目标平台与辐射源的搭载关系,建立辐射源识别和平台识别的两级识别体系,基于两点和三点模板匹配法对辐射源进行识别,然后使用非组合的快速模板匹配法对目标平台属性进行识别。仿真实验表明使用该方法计算目标的识别置信度简单易行,可用于实际工程中电磁目标的识别。     

基于场景的目标综合识别

多部异构传感器在出现高冲突情况下的属性融合上往往得到与事实不符的结果。 通过对机载平台常用的目标属性识别手段及其识别能力的分析，给出了机载平台工作场景分 类、识别融合架构、识别准则，以及基于不同场景的识别流程，较好地解决了平台异构传感 器在高冲突情况下的属性融合中出现的问题。     

一种目标密集环境下的雷达目标与IFF点迹相关算法

提出了一种基于联合概率数据关联（Joint Probability Data Association,JPDA）思想的雷达目标与敌我识别（Identification Friend or Foe,IFF）点迹相关方法,利用雷达目标历史IFF属性及关联概率作为先验信息,结合当前雷达目标航迹和IFF点迹的分布情况,通过基于JPDA的方法计算各雷达目标与IFF点迹的关联概率,最后利用目标识别规则库对目标属性进行判定。几种典型场景下的仿真结果表明,通过对目标的多次询问和相关概率的迭代,所提方法可有效提高目标密集环境下对我方合作目标的正确识别率,同时降低对非合作目标的误识别率。     

基于直觉模糊推理的未来地面防空作战的威胁评估

研究威胁评估问题。首先,分析了防空作战中影响威胁评估的空中来袭目标的主要因素,建立了威胁程度等级划分的模型;其次,设计了状态变量的属性函数,建立了推理规则,并设计出推理算法和解模糊算法;最后,举实例验证了该方法的有效性。     

Brown＇s Blossom in Britain-China

The overall strategic relationship between U.K. and China is ＂better than ever＂, China- Britain relations have maintained good momentum, with increased high-level exchanges and the reinforcement of strategic mutual trust, with more room for growth in the future.     

Challenge and Opportunity Go Hand in Hand——What Global Economic Agitation Brings to the China's Economy?

Domino effects of the global finance agitation As the origin of the subprime crisis,US financial institutions lost USS45 billion last year,accounted for over half of the total US,EU & Japan loss.Since January 15th,Chtigroup released its financial statement of the 4th quarter,showing a net deficit of USS9.83 billion,which marked the hisoric high of its quarterly deficit.     

Sinosteel：Extraordinary Moves in Industry Chess

Among the Fortune 500 firms,more and more images from China emerge out.On the 2008 list,Sinosteel Corporation,a landmark group of China industries quietly squeezes into the candidate line.As the largest steel service ＆ trade enterprise,its sales reached at RMB 111.24 billion,with a year-on-year increase of 83.03 percent,and the profit grew by 180.03 percent.On the Sinosteel 2008 Work Meeting,the president Huang Tianwen uttered,＂In the coming year,we will work for US$20 billion sales,and look forward to getting a position in Fortune 500 firms for ourselves.＂     

Walk Through Unusual Five Years—— An Exhibitor＇s Canton Fair Course

When the 103rd Canton Fair is approaching, an old friend of Canton Fair, Li Ying from Jiangsu prov-ince recollected his past five years＇ experiences to the grand trade meeting. Each year is special, with some unforgettable memories colored by the year.     

Jean-Pierre Duprieu： Willing to Be A Legate of Sino-French Business

Estaing, former French president, Valery Giscard d＇Estaing attended Sino-French Economic Seminar held in Shanghai in early April and said that the world center has shifted from the west to the east with many European and US companies entering into Asia, and China has the ability to play an important role in the world stage. Estaing, naming himself＂French Confucian＂, then said in Chinese that a cook-group includes 10 people in ancient Chinese soldier system and the cook is in charge of cooking for them. And people who belong to the same cook are actually ＂Partners＂.     

China''''s Stock Market Wave

The annual meeting of the World Economy Forum was held in Davos,a little town in Switzerland,on January 23rd to the 27th this year,with the theme"the Power fo Collaborative Innovation",over 2500 celebrates from ture political and cconomic circles of more than 80 countries and challengred logether to talk about the future of the global economy in 2008,A Forum for the problems and challenges that face whole world,some of the keywords which drew attention during the event were:the U.S.subprime mortgage crisis,soaring energy prices,the economic slowdown in the U.S.ermerging economic bodies,authority funds and the general unpredictable nature of the global economy.     

Trade Promotion from Neighborhood

If you are considering to trade with companies in Japan or expanding your .business to Japan, we are ready to help from the very beginning.＂ You will find this greeting at the first sight on the Chinese website of Japan External Trade Organization （JETRO）. JETRO has committed itself in delivering highly efficient and quality services to meet the demand of internal and external customs including Japanese companies, hence winning a good reputation in the international trade arena. In recent years, with its priority in advancing business cooperation in South and East Asia, JETRO has made great achievement in promoting trade between China and Japan. Therefore, China＇s Foreign Trade interviewed Mr. Yoichi Maine, Deputy Director General of JETRO BEIJING.     

Auto Parts Market Potential Coming into Surface

Looking at the increasingly fierce competition in the world auto market. global automobile manufacturing industry, taking Europe, the U.S. and Japan as representatives, is gradually forming a new type of relationship, mutual cooperation between whole vehicle and parts manufacturers. We can clearly see that auto parts manufacturers have become independent from the whole vehicle manufacturing companies, which means that the former structure of auto industry has greatly changed, and a new relationship,     

Domino Effect on Electricity and Coal Prices

In the middle of last December, the key purchase contracts for coal used in power generation in 2008 were signed, reflecting a demand for more than 1.085 billion tons. It is important to note that the country＇s five biggest power producers, China Huaneng Group, China Guodian Corporation, China Power Investment Corporation, China Huadian Corporation and China Datang Corporation, had settled on the prices on their purchase contracts, and they are expected to consume 290 million tons of coal for generating electricity,     

Slimmed May Day Holiday

Last November the State Council of China decided to renew its holiday system by reducing the seven-day May Day holiday to three days and introducing three new one-day public holidays, namely the Qingming Festival, Dragon Boat Festival and Moon Festival. By doing so, the three golden-week holidays that were introduced in 1999, namely the Spring Festival, May Day and National Day, could be better distributed.