通信性

Semaphores and message queues provide mechanisms to allow cooperating tasks to communicate with each other.

VxWorks应用程序采用多任务的设计思想，根据要求分配任务优先级，各任务通过信号量和消息进行通信，具备很高的实时性。

The scheme decreases the computation and storage of mobile nodes with reduced commutation overhead.The security is also improved for the initially existence of the off-line trued third party.The scheme provides high availability and security due to the distributed public key management model and gives a good solution to the problem of public key revocation dependent on the localized trust model.The server nodes of public key management can be dynamically adjusted to adapt to the dynamic nature of MANET.

方案中不需要公钥证书的存在，减少了系统通信开销以及结点的计算量和存储容量；在组网时依赖于一个离线的可信任机构，提高了系统的可信度；采用分布式CA模型，克服了传统集中式CAN用性与安全性的问题；依靠局域化的信任模型，对恶意结点进行了有效的处理，较好地解决了公钥撤销问题；****管理服务结点可动态调整，能够较好地适应MANET的动态特性。

It can be used in the tracking system of a mobile satellite communication system to make the beam of the directional antenna on a vehicle point to the satel...

该系统能消除载体的变速运动对输出航姿角的影响，结构简单、紧凑，成本较低，可用于定向性移动卫星通信天线跟踪卫星的开环控制系统中。

Raytheon Company further demonstrated its leading edge Joint Battlefield Integration capability earlier this month with a real-time hardware in-the-loop demonstration of Joint Command, Control, Communications and Intelligence (Joint C3I).

雷声公司于本月早些时候在联合指挥、控制、通信及情报（联合C3I）演示中，进一步展示了其在联合战场集成能力方面的领先性。

Through analyzing the technology characteristics of electronic intelligent trip, a new good performance and inexpensive intelligent trip AITU is developed which is of the advantages such as motorization, strong currency characteristics, and integrated the functions of measure, watching, protection, control and communication.

它共有六个模块：微处理器模块、待测信号获取模块、电源模块、控制模块、人机交互模块、串口通信模块，可根据具体需求在软、硬件上增加或裁减部分模块，具有很强的灵活性；而且精度高，稳定性好，实时性强，完全符合国家的标准要求。

Aiming at the problems that alarming signal of gas alarming head lamp at present can′t be obtained by monitoring center and fixed gas detector has small monitoring areas and is difficult to move,the paper proposed a design scheme of multi-function gas alarming head lamp with the function of wireless transmission of gas overrun signal.

针对目前瓦斯报警矿灯的报警信号不能被监控中心获取及井下固定瓦斯探头检测范围小、移动性差的问题，文章提出了一种具有瓦斯超限信号无线传输功能的多功能瓦斯报警矿灯的设计方案，详细介绍了该矿灯的硬件与软件设计，给出了无线射频通信方案及其关键技术。

The embedded display and control impoldered board basede on ARM9 adopt the chip with ARM9 core as MCU and use multi-peripheral interface and independent the display module.This board can realize the exchange and display for information and multi-communication means and have favorable expansibility and transplantability.

系统的显示与控制开发板采用带有ARM9核的芯片作微处理器，辅之以多种外围接口和独立的显示模块，实现了信息的交换与显示和多种通信手段，提供了良好的人机交互，同时具有良好的可扩展性和可移植性。

To meet the requirements of geographical decentralization, large amount of acquisition points, less data, quasi real-time mode of distribution networks, the data acquisition communication newrok was realized by the commercially available GPRS/CDMA wireless public network and was connected with the wirelss network operators with Access Point Name.

针对配电网地理位置分散、采集点多、数据量少、准实时性要求的特点，数据采集通信网络采用成熟的GPRS/CDMA无线公网实现，以APN专线方式与无线网络运营商连接。

To solve the exsisting problems in the realization of the LFM/CW radar, the thesis presents a technique for dynamically measuring the LFM/CW signals, which can accomplish the dynamic measurements of FM linearity, FM bandwidth and FM slop of the transmitted signals of LFM/CW radars. This technique creates an effective and accurate means of judging the performance of LFMCW radars. The linearity-correction techniques presented in the thesis successfully make the linearity of the transmitted signals of an actual LFM/CW radar reduce from approximately 25% to 0. 1%(or r. m. s linearity of 0.04%), better than the best results (0.22%) obtained by foreign researchers with complex linearization closed-loop in the same kind of LFM/CW radars, according to the published literatures during the last decade. In order to improve the capability of the real-time processing and range-cells management of LFM/CW radars, the principle of equivalent mixing by lacking-sampling process of band-pass real signals is proposed based on the well-proved improvedversion of sampling theorem of band-pass real signals. This principle is used to configure the range-segments processing of the beat signals of an actual LFM/CW radar. The techniques of system-background interference suppression and the beat signal's dynamic range suppression are proposed, and are realized in an actual LFM/CW radar to demonstrate their effectiveness.

针对线性调频连续波雷达实现中急待解决的技术问题，文中提出并验证了线性调频连续波信号的综合动态测试技术，可以完成对线性调频连续波雷达发射信号的扫频线性度、扫频带宽和扫频斜率的综合动态测试，为衡量实际线性调频连续波雷达的系统性能创立了精确有效的测试手段；文中建立的非实时闭环动态校正技术使一部实际的线性调频连续波雷达的发射信号（时带积3×10〓）的扫频线性度从25%改善为0.1%（方均根线性度0.04%），优于国外已公布的80年代同类雷达中采用复杂的实时闭环动态校正环路所获得的实际结果（0.22%）；为了改善线性调频连续波雷达的实时性和分辨单元数处理能力，文中发展完善了实带通信号的采样定理并给予了严格证明，并在此基础上提出了欠采样等效混频原理，将其应用于实际线性调频连续波雷达的距离分段处理中；针对线性调频连续波雷达中系统背景干扰和回波动态范围问题，创立了系统背景综合抑制技术和频域动态范围压缩技术，并将它应用于实孔线性调频连续波雷达系统中，显示出它们的有效性。

The key design techniques of CAN interface were discussed.The priority of the transmitting message was set in terms of the identification code of CAN frames.

利用CAN总线数据帧的标识码设置传输报文的优先级，通过设计优先级晋升算法来改善多轴嵌入式数控系统报文数据通信的实时性和有效性。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。