基于元模型的复杂航电系统建模

针对当前综合模块化航空电子系统（IMA）开发中存在的问题,提出了一种基于元模 型的航电系统建模方法。该方法充分利用了基于特征的元建模理论,通过合理划分和描述构 成整体的各部分及其相互关系,构建航电系统领域的元模型。通过建模工具将元模型解释成 面向领域的建模语言,在此基础上可构建具体的航电系统模型。以航电系统为实施对象进行 了验证,结果表明该方法可显著提高航电系统的开发效率。     

综合模块化航空电子系统的BIT防虚警设计

针对现代综合模块化航电系统的机内测试（Built-in-Test，BIT）虚警问题，深入分析了其I类和II类BIT虚警的产生原因及机理。结合航电系统综合化、模块化的架构特点及其复杂性、层次性、相关性和不确定性的故障特征，从模块和系统两个层次提出了BIT虚警的技术解决措施以及全寿命周期需采取的设计手段。重点给出了一种基于模型的系统级BIT虚警识别算法，能依据测试性建模输出的D矩阵，分析测试之间相悖或相互佐证关系，识别虚警和确认真实的故障指示。最后，结合综合航电超短波功能进行了案例验证。     

基于多信号模型的综合化航电系统综合诊断算法设计

针对现代航电系统综合化程度高、故障现象复杂多变、故障诊断能力不足的现状,分析了综合化航电系统的故障特征,总结了其故障诊断算法的设计要求,并在此基础上设计了基于多信号模型的故障综合诊断算法,具体包括：建立了算法的总体架构,针对机上LRU/LRM级、子系统级和系统级诊断以及在线诊断的特点分别设计了适用的诊断算法模块,特别针对子系统与系统级诊断,设计了防虚警处理算法、快速诊断算法和精确诊断算法,以解决航电系统机内测试设备（BITE）长期存在的虚警难题,满足不同BIT工作模式下故障诊断的要求;建立了多层次诊断架构下的综合诊断流程,规划了各诊断模块的组成、功能、工作原理和输入输出数据。梳理了综合诊断算法设计的工作项目及其接口关系,给出了航电系统集成研发模式下综合诊断算法的设计流程,为工业部门在研制阶段进行航电系统综合诊断算法的设计开发提供支持。     

航电系统高精度时间同步方案

现代战机强调航电系统的高度综合化以及编队协同作战,而高精度的时间同步是其实现的基础。针对该需求,提出了一种兼顾飞机平台内部时间同步和编队时间同步的方法。通过建立飞机平台内部时间中心,结合飞机航电系统本身具备的卫星导航授时能力以及数据链授时能力,可以实现飞机平台时间和编队时间的高度统一。误差分析结果表明,其实现的平台内部及编队平台间时间同步精度可达到100 ns量级。该方法实现原理简单,能直接应用于工程化设计。     

综合通信导航识别系统中的多链路超短波通信的实现

介绍了综合化航电系统的发展与特点.为解决在综合化系统中实现超短波通信功能的问题,以及实际使用中多条通信链路同时工作的情况,基于综合化设计方法与软件无线电设计原理,提出了功能与模块实现方案,对系统关键指标进行分析与测试,验证了方案的可行性.     

基于模型的综合模块化航电系统测试性设计方法

针对综合模块化航电系统对测试性提出的更高要求及其工程实践中存在的典型问题，定义了一种分布-集中式的系统测试诊断架构，以适应其体系架构的特点和生产配套关系的变化；提出了一种基于模型的系统测试性设计方法和流程，以测试性模型为驱动指导航电系统的测试性方案设计、评估与优化过程，取代传统的基于指标的测试性设计方法。在某机载综合射频系统上开展了方法应用，成功解决了该系统综合化以后测试诊断架构设计与测试性分配的非线性问题。     

通用飞机综合航电技术发展综述

我国的低空空域开放政策正逐步推进,通用航空产业方兴未艾,对通用飞机航电技术的研究具有重要意义。回顾了通用飞机航电技术的发展历程,指出综合化是其必然的发展趋势。同时,比较了通用飞机和运输类飞机的航电系统,研究了国外典型产品,总结了通用飞机航电系统的特点,指明了发展方向及关键技术,可供相关研究作为参考。     

论会计核算信息系统的面向对象分析与设计

结合会计领域背景,讨论了面向对象设计和面向对象实现,在面向对象实现过程中,用对象分解取代功能分解,设计了不同的类等级,并定义各自的属性和服务,建立了UML模型。充分考虑了系统的可移植性、重用性等方面,采用了Java语言实现。     

通用航电总线驱动软件设计与应用

针对现有航电仿真系统中总线驱动软件存在的功能单一、可扩展性差、重复开发严重等问题，结合航电仿真系统数据驱动特点，提出了一种扩展便捷、配置灵活、运行稳定的通用航空总线驱动仿真软件的设计与实现方案。该方案基于面向对象设计思想，采用分层式软件架构与模块化设计，利用可扩展标记语言(XML)格式的灵活配置特性和发布/订阅式数据分发网络的动态性及传输优势进行设计，保证了方案的通用性和灵活性，提高了软件的健壮性和可重用性。基于该方案设计的通用总线驱动软件可显著提高航电仿真场景中多总线数据分发的效率。     

基于IIEM的企业建模方法研究

在集成企业建模方法(IEM)的基础上,以一种基于可复用标准构件的改进的IEM建模方法(IIEM)来构建模型,该方法采用面向对象的建模技术和统一建模语言UML,通过构建可复用标准构件及扩充对象类和企业模型视图来实现企业模型,使企业模型具备了更好的适应性和主动性。最后通过一个实例说明了IIEM方法的可行性。     

Universal Coverage, Pinpoint Illustration and Profound Impact HTC 2008 Intermedia Recommendation and Introduction Meeting

Holding 88 percent of train media resources across China, based on "Time Cube", on the 2008 Intermedia Recommendation and Introduction Meeting on December 19, 2007, HTC announced its high-profile strategy of tour marketing and tapping the immeasurable potentials on the train. Meanwhile, HTC officially launched its brand new product Olympic Train on the meeting, providing a fabulous platform for all the brands that are prepared to do a smart marketing on the occasion of 2008 Olympic Games.     

Market presence in China strengthened Network growth and Dual-Chinese-Hub Strategy More frequet Flyer Benefit——Air China and shanhai Airlines Join Star Alliance

In the end of 2007, Air China Limited (hereinafter "Air China") and Shanghai Airlines, formally joined Star Alliance at a ceremony held in the new Terminal Three at Beijing Capital International Airport. With the addition of the two Chinese airlines, Star Alliance now has 19 member carriers operating 17,000 daily flights to 897 destinations in 160 countries.     

A World of Love 2008 Music Grand Ceremony

Under the guidance of the theme slogan of the 29th Olympic Games - One World One Dream, with dream, love and dedication as its theme, the 2008 Music Grand Ceremony ＆ 1000 People Charity Concert on 100 days cotmtdown to Paralympic Gamesis officiaily launched on December 22, 2007. The 2008 Music Grand Ceremony is sponsored by China Disabled Persons＇ Federation, and co-hosted by National Paralympic Committee of China,     

MUYANG GROUP

With its headquarters in the historic city of Yangzhou,Jiangsu Muyang Group Co.,Ltd has since its founding in 1967 grown into a well-known group corporation whose activities cover research ＆ development,project design,manufacturing,installation and services in a multitude of industries including feed machinery and engineering,storage engineering,grain machinery and engineering,environmental protection,conveying equipment and automatic control systems.     

China''''s National Oil Reserve Center was Born

Aseries of events that occurred in October 2007, are rewriting the history of China's energy industry: November 3 an Energy Law Committee asked the public for suggestions on improvements; forty top experts came together to form the National Energy Expert Advisory Committee on November 6; and the National Oil Reserve Center (NORC)became the nerve centre of oil reserves on November 18. Yet, behind the progress of these recent activities remains the fact that international oil prices still hover around a very high price of US$ 90/barrel, and China's oil imports are close to accounting for half of its total oil reserves.     

2007 China Harbor Ten People

2007 China Harbor Ten People elected the entrepreneurs who contributed a lot to port economy and enterprises this year trough their talent management.These ten people embody their social responsibility,professional skills,creative ability,and charming personality.Bearing full confidence in China＇s port economy,the port entrepreneurs are brave enough to explore a brand new area,so as to promote harbor economic development. At the very beginning of 2008,China Shipping Website,Dalian Maritime University,and China Port and Shipping In- stitute jointly select the 2007 China Harbor Ten People,demonstrate port entrepreneurs＇ stunning minds,disclose their secrets to success,and providing abundant experiences to others in harbor development.The top ten people are various excellence during the ups and downs harbor development.     

Sony Style in China

Since the normalization of the diplomatic ties between China and ） Japan, the bilateral economic relations have deepened continually. According to the statistic of Japan, China passed U.S. to become Japan＇s top trade partner as well as is the second largest export market for Japan and is the largest import resource for Japan. Japan companies such as Mitsui, Sumitomo, Sony and Panasonic, have set the subsidiaries in China and explored their scales. This year 2008 marks the 30th anniversary of the signing of the ChinaJapan Treaty of Peace and Friendship.     

China''''s Import and Export of Textiles and Apparel in the Q1

China's textile and apparel industry suffered an unprecedented cold market for exports in the first quarter this year,the result of a few factors including: the appreciating RMB, decreasing export rebate rate,expanding influence of the U.S. subprime crisis, increasing costs of production and rising labor cost.     

Like An Angel

The central bank of China has raised her deposit rate for 6 times,and deposit reserve rate for 16 times,since last year up to now,which resulted to a great suffer to those small and medium sized enterprises in finance collection.30 percent of China s small and medium sized enterprises have to be closed down, and 60 percent of them are because of finance problem.How to gather the fund is the biggest obstacle for China's enterprises to grow.     

Zhang Hao,Health of wealth

Contribution to the society Zhang Hao owns great opportunity to store intelligence and knowledge, in her early year.Zhang Hao was graduated from Economic Management Department of People's University in 1983 and later finished her study in Advanced Training Program of CEO of Chinese Direct Selling Enterprises in Peking University.