通信系统

Host controller and multiple-site controller using asynchronous serial communication, or "soft-serial" in accordance with the "communication protocols" to achieve branch communications, computer controlled multi-component of "Distributed Control" system, according to three Flop flip side of the control sub-drive motor, to achieve large-scale three sides of the sign face will be over the screen, time, optional flip way, the sign face of an error "automatic error correction flip" and drive the requirements.

主控制器和多个现场控制器之间采用异步串口通信或"软串口"按照"通信协议"实现分支通信，组成多微机联控的"集散式控制"系统。这种多微机联控系统极大地简化了控制电路的连线，简化了电气控制安装工艺与施工，在降低工程费用和后期维修费用的同时，可大幅提高控制系统工程的可靠性、稳定性、性价比。

A wireless system for use in a low power data communications in a sub-millimeter wave zone includes at least one wireless communications device including a directional antenna whose cross-polarization discrimination is not less than 24 dB, wherein the wireless system uses a plurality of planes of polarization selectively.

一种用于亚毫米波带中的低功率数据通信的无线系统包括至少一个无线通信装置，该无线通信装置包括交叉极化鉴别率不小于24dB的定向天线，其中，该无线系统有选择性地使用多个极化面。

With the analysis of common methods of electronic defrayal communications network and authentication , we have studied out a secure communications scheme based on the smart card and the public key encryption in this paper .

本文通过对目前常见电子支付网络通信与认证方式的分析，提出了基于智能卡和公开密钥体系的电子支付网络系统保密通信方案，并详细论述了该方案相对于传统方案而言在解决电子支付网络系统保密通信方面的特点和优势。

This paper designs a communications network of distributed structure in filling station and introduces the composition of the system.

文章对汽车加油站IC卡智能化收费系统分布式结构的通信网络进行了设计，介绍了其系统的构成，对通信网络的结构、协议以及通信接口电路。

The system applys sm89c51 as a hypogyny enginery .It combines the advantage of SCM and Matlab,basedon intermit communicate mechanism of event drive. Bring forward the aicumstance of Matlab,PC enginery and SCM carry real time. Serial communicate dispose.accomplishing the system of and PC enginery RS-232/rs-485 serial communicate.

该系统以单片机89C51为下位机，结合单片机和Matlab两者的优点，基于事件驱动的中断通信机制，提出一种Matlab环境下PC机与单片机实时串行通信及数据处理的方法；完成单片机数据采集系统与PC机的RS-232/RS-485串行通信。

In order to investigate the variation of controllability and observability affected by network scheduling,the model of scheduling for Networked Control System is established,which has communication constraint on its input and output channel.Utilizing communication sequence to express the scheduling of channel,the model can be transformed into discrete-time switch system.Under static scheduling,using the theory of recursive invariant subspace and its character,a necessary and sufficient condition of NC...

为了研究网络调度对能控性与能观性的影响，对输入、输出通道都存在通信约束的网络控制系统的调度进行建模；利用通信序列表示通道的调度情况，最终将模型转化为离散切换系统；在静态调度下，利用循环不变子空间理论及其相关的性质，给出了网络控制系统能控性、能观性成立的充要条件，并给出了原有控制系统与经网络静态调度后的系统之间能控性、能观性的关系；最后用仿真实例说明了所提结论的正确性。

The SINS of FOG is designed and implemented based on DSP. The system is with a dual CPU structure. DSP is used to process data while MCU controls data acquisition and the communication between DSP and MCU is achieved by dual-port RAM. All of these constitute a small strap-down navigation system. Meanwhile introduced a kind of algorithm of SINS, SPI communication and the second boot Loder of TMS320C6713 in briefly. After testing, the system speed and accuracy satisfy design requirements and the system has been applied to actual system.

介绍了一种基于DSP的光纤陀螺捷联惯导系统的设计与实现方法；系统采用DSP+MCU的体系结构，DSP主要完成导航计算，利用单片机实现对数据采集模块的控制，并通过双口RAM实现单片机和DSP的数据通信，构成了一套小型捷联惯导系统，同时给出了一种捷联惯导算法编排，简要介绍了SPI通信和TMS320C6713的二次bootloder方式；经测试，系统速度和精度都满足了设计要求，已应用于实际系统。

With the further development of computer network, communication network and the distributed system, communication protocols are more and more complicated, formal description technology plays the indispensable role in the network protocol design. LOTOS - as one of the ISO standards of FDT, is designed for distributed systems, especially for communication service and communication protocol.

随着计算机网络、通信网络以及分布式系统的不断发展，通信协议有日渐复杂化的趋势，形式描述技术在网络协议设计中占有举足轻重的作用，作为国际化标准之一的LOTOS技术是专为分布式系统设计的形式描述技术，特别是通信服务和协议。

A real time heterogeneous system communication scheme, which maintains the coherency between design and verification, is proposed. A method for solving metastability in heterogeneous system with high efficiency is also proposed.

提出了一种异步系统的实时通信机制，该通信机制具有设计和验证一致的特点，并对异步系统通信中必然存在的亚稳态问题进行了分析，提出了高效的解决办法。

Finally, communication between interlocking machine and failure-safety intelligent module works as responsion mode and is classified as 2 levels （data preprocessing and CAN card driver）. Some technologies such as data checking and positive-reverse code transmission are adopted in this function in order to obtain data transmission reliability.

联锁机与安全智能I/O模块之间的通信，工作模式采用应答方式，分为数据预处理和CAN智能卡驱动两个通信层次，所采用的数据校验和正反码传输技术可以达到可靠的数据传送，该通信过程具有适应分布式系统控制、系统升级方便、多重安全防护等特点。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。