航电综合处理机技术的车电领域应用研究

从几种典型航电综合处理机入手,将其系统架构,网络选型,组合模块实现及工程化等技术进行了分解研究,研究了航电综合处理机技术向车电领域应用的方法,并对技术移植的可行性和收效性等方面进行了研究。     

民用飞机航电系统自动化测试与管理设计与研究

目前我国的民用飞机的航电系统通常采用的是集成验证的方法,这种形式不仅程序和步骤比较复杂,还要消耗掉很长的验证时间,不利于航电系统工作效率的提高。所以笔者在此基础上提出了一种新的民用飞机航电自动化测试管理系统,不仅能够实现灵活的自动化测试与管理,还能够同其他航电系统组合,实现航电试验的集中化和自动化管理。下文中笔者将对这种自动化测试和管理技术进行详细分析。     

某型综合程序训练器航电仿真系统设计

综合程序训练器在飞行培训领域得到了广泛的应用。本文采用GL Studio和QT Creator来构建航电仿真系统,在某型综合程序训练器的研发中得到了很好的应用。     

基于PXI平台的电源参数激励器设计

在民用飞机航电系统的适航符合性验证试验(简称验证试验)中,常用到试验室试验(Mo C4),本文所述的基于PXI平台的电源参数激励器(简称激励器)即为在试验室中,用来代替机上真实传感器来产生有关电源参数的信号,信号的种类、数量与电气特性均需满足适航当局有关规定的要求。通过激励器来模拟激励信号,发送给用于装机的电源参数采集设备(简称采集设备),通过监控采集设备输出端,来验证采集设备是否符合设计预期要求。在民用飞机的设计越发成熟的今天,航空电子系统的综合化程度也越来越高,航电系统的功能越发复杂,其与机上其他系统间的交联关系也更加紧密,因此航电系统的适航符合性验证常采用机上地面试验(Mo C5)和飞行试验(Mo C6)的方式。若能在试验室试验(Mo C4)中,完成航电系统与电源系统的有关验证试验,将会大大降低试验的成本,缩短试验的周期,也能减轻航电系统机上地面试验和飞行试验的负担,加快飞机适航取证。     

某型飞机激励器系统的研究

本文是以激励器系统的研制为基础,研究一种飞机无线电通信导航系统自动化测试技术,同时该激励器系统能够通过429总线板卡模拟通讯导航机载设备的429信号输出来参加航电系统的综合试验,完成对航电系统BCMP控制指令的应答及数据的仿真。     

通用飞机综合航电技术发展综述

进入二十一世纪后,我国综合国力不断提升,科学技术发展迅速,进入新时代,民用飞机的进一步发展面临着更大的机遇与挑战。我们不仅要保证乘客的安全,为其提供更加快捷、高效的服务,还要实现民用飞机的进一步创新发展,实现更大的经济价值。因此,通用飞机综合航电技术受到了广大航空工作者的重视,本文中,笔者将结合本公司相关经验,阐述通用飞机综合航电技术的发展,以便各公司深入了解该项技术,并将其运用于具体的工作中,以促进通用飞机的进一步发展。     

航电仿真器设计方案

本文研究飞机航电仿真器技术是针对飞机空气管理系统、风挡加热系统、旅客氧气系统等与航电系统存在输入输出交联关系以及通过航电网络传输信号相关方面仿真器技术的设计方案。飞机航电系统仿真器主要通过试验网络、仿真系统、输入/输出系统、数据监控/记录系统、虚拟面板和虚拟航电显示系统几个方面的技术来实现的。该仿真器可以仿真航电系统与空气管理系统、风挡加热系统和氧气系统之间的交联信号、数据信息以及逻辑关系,为空气管理系统、风挡加热控制器以及氧气系统提供正常工作所需的输入激励,并能够对上述系统的工作参数进行采集、传输、处理,完成系统的状态显示及控制。     

浅谈民机航电系统设计中的人因考虑

国内民机航电系统设计较少考虑人因,伴随日益增长的安全性需求和人因适航条款的明确,民机航电系统人因设计越来越受到重视。本文系统的介绍了民机航电系统设计中涉及的人因,讨论了航电系统人因设计的安全性、高效性、舒适性设计准则,最后对民机航电系统人因设计流程进行研究。     

理科综合考试对高三化学教学的启示

几年来,理科综合测试已由“知识立意”、“知识综合”转向“能力立意”和“能力综合”。它在体现素质教育要求的同时又极大地推进了素质教育的进程,对中学教师的教学工作也起到很好的指导作用。     

某任务管理计算机航电系统测试与研究

为了解决某机载任务管理计算机航电系统测试设备对故障的快速定位及故障诊断、隔离问题,对机载计算机航电测试设备的系统结构、硬件、软件进行了分析,阐述了系统测试设备的设计思想及实现方法,最后通过对机载任务管理计算机各模块故障模拟、数据分析,对测试系统设备进行了评价,验证了某机载任务管理计算机测试设备设计的合理性和可靠性,为机载计算机测试系统设计、研发、故障隔离诊断提供借鉴和参考。     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.     

Cooler temperatures inductive to locust outbreaks

Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

Low doses of a red wine ingredient figh diabetes in mice

Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said.     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.     

Rough Justice: A Statistical Assessment of ICANN's Uniform Dispute Resolution Policy

Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP.     

Prevalence of soft neurological signs in Chinese people

Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.     

Molecular motor assembly of a biomimetic system

Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction.     

Monoculture Rubber Plantations Have Negative Ef ects on Controlling Splash Erosion

<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence