通信的

In addition, the network throughputs are analyzed with the channel transfer protocol CSMA. The computer simulation of the system model is performed.

在组网后规定网络通信路由的情况下，利用CSMA作为信道传输协议，对网络中节点之间通信的吞吐率进行了分析，在给定节点平均通信业务量的条件下，分析了整个网络的吞吐率，推导了模型参数的估值公式。

The key is the unique identifier on global and the deamon maintains its uniqueness,that is,by coordination of deamons each other, data structure have a unique key on global which is founded and used for communication, processes required communication can access the data structure by this unique identifier,thereby,to achieve purpose of com

这个关键字是全局唯一的，它的唯一性由守护进程来维护，即守护进程之间通过相互的协调，使得创建的用于通信的数据结构具有全局唯一的关键字，想要通信的进程通过这个唯一的标识符来访问这个数据结构，从而达到相互通信的目的。

Simulation results show that Fast RSVP scheme,compared with other traditional RSVP extensions for mobile environments,has the following advantages:(1)it realizes a mobile node handover with QoS guarantees;(2)it avoids resource wasting caused by triangular routes and duplicate reservations in mobile IP handover process;(3)it distinguishes different types of reservation requests,greatly reducing the handover session forced termination rate while maintaining high performance of the network.

未来新一代网络(next generatinn network。简称NGN')将是一个支持多种移动接入方式的全IP网络。然而，当前的移动IP川技术仅仅保证了用户在移动环境中通信的连续性，对于如何保障移动通信服务质量(q ualityof service，简称Qos)的问题并没有太多关注。伴随着无线通信技术的发展

ABSTRACT In the first chapter, the basic theory and developing phases of spread spectrum communication are introduced. Smart antennas technology is introduced based on comparison of different multiple address methods. The main technical character of smart antennas and the progress in the application are also summarized.

本论文讨论了移动通信CDMA系统中智能天线技术的应用，论文第一章介绍了扩频通信的理论基础及发展阶段，在比较不同多址通信方式的同时引入智能天线技术，归纳了智能天线的主要技术特点，总结了目前智能天线技术在理论和应用中的进展，最后介绍了本文所做的主要工作。

The eCAN module in the signal processor TMS2812 is introduced. Its correspondence partial hardware and the software design method with the CAN bus between correspondence is given. The OPC server is used for host, slave computer I/O driver, which has enhanced the ability of the scene intelligence measuring appliance computation complexity and system real-time communication.

详细介绍TMS2812信号处理器的eCAN模块以及其与CAN总线之间的通信，并给出其通信部分硬件和软件的设计方法，采用OPC服务器为上、下位机的I/O驱动程序，满足了现场智能仪表的计算复杂性和系统通信的时实性。

Chapter Three examines some spreading codes and their correlative processing, which is the foundation of spreading modulation and demodulation.Chapter Four, based on the CEBus standard protocol system, stresses the structure of intelligent home networking system, analyzing the working principle of the system, and discusses the realization of PLC module and communication between instruments and PC.

第四章重点阐述了基于CEBus的家庭测控网络系统构成，研究了CEBus标准协议体系与此系统的工作原理，同时深入探讨了电力线扩频载波通信模块的具体实现方法及家庭测控网络仪器与PC机通信的实现，总结了家庭网络应用电力线通信的不足之处。

In this thesis, first, we present the acquisition theory of conventional spreadspectrum communication system and the theory of SESS system.

本文首先对扩频通信系统编码同步的理论、自编码直接序列扩频通信的原理、自编码扩频序列的产生方法及其统计特性进行概述，然后详细讨论了自编码扩频通信的编码同步捕获问题。

The security of several typical chaotic synchronized secure communication schemes , as well as the respective unmasking methods are studied to find the way to improve the security. A new secure communication scheme based on active-passive decomposition using parameters perturbation technique, which makes it has a kind of dynamic secrete key, is analyzed in this paper.

摘要在分析几种典型的混沌同步保密通信方案及针对混沌同步保密通信的分析破译方法的基础上，研究了一个新的基于Lorenz方程的主动一被动同步保密通信方案，其特点是具有动态密钥，从而对上述攻击方法具有抗破译能力。

The network communication is applied in vehicle detect system which is one of the most important parts in orbit traffic. The working information of the vehicles can be detected and transmitted to the vehicle control system on the floor through the vehicle detect system. The realization of network communication is introduced into the vehicle detect system, and the mechanism of network communication is transplanted to the embed system based on Reworks.

主要介绍了轨道交通车况检测系统中网络通信技术的应用，车况检测系统是轨道交通系统的重要组成部分，通过车况检测系统可以实时采集列车的车辆工况监控信息并将它及时传输给地面的车辆工况监控系统，本文阐述了在车况检测系统中网络通信的实现方法，并给出了基于Reworks嵌入式系统下的网络通信机制。

Among of them , The developed speed and scale of mobile communication market making all of world person pay more attention to it.

其中移动通信市场的发展速度和规模更是令世人瞩目。20世纪90年代初，即使是最有想像力的移动通信的权威人士，也无法预测今天我国移动通信市场的排山倒海发展势头。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。