接收端

Firstly, the thesis introduced the development of VOD, the background and meaning of the program, then the author introduced the associated technology, mainly including the feature of multimedia, video compression technology and the protocols SCTP and RTP. Considering the ambulant of host , fluctuation of bandwidth,high error rate data in wireless networks ,the author proposed some QoS strategy in the wireless networks such as RTP/SCTP protocol stack , connection control of the server, two buffers in the client end point.,TFC congestion control algorithms ,etc. Based these strategies, the team members gives the software and hardware solution of the wireless video-on-demand system and gives the main modules design of the software system. The system adopted the C/S structure including two parts: server and client ,using the Mpeg-2 which is apporiate for networks as the supported format. The thesis emphatically researches on the video-serving module of the server and the sink module, player module of client.

本文首先介绍了视频点播系统的发展现状、课题的研究背景和意义；接着对课题的相关技术进行概述主要包括了多媒体特点，压缩技术，传输协议SCTP以及RTP；针对无线环境的节点移动性，带宽波动性，数据错误率高等三大特点，作者研究设计了无线环境下的QoS策略：RTP/SCTP协议栈，服务器准入控制机制，客户端双缓冲区，TFRC拥塞控制机制等；在这些策略的基础上设计了系统的软硬件解决方案，并对软件体系结构的主要模块进行了设计，整个视频点播系统采用C/S结构，由服务器，客户端2个部分组成，使用适合网络传输的流媒体格式Mpeg-2作为系统支持的格式，文中重点研究了服务器的视频服务模块以及客户端的接收模块和播放器模块，并利用线程池技术对系统进行实现。

I use Visual Basic and Access 2003 to build the terminal application.

系统服务器端由手机/GSM模块和PC机组成，可通过声卡和串口接收用户端的心电数据。

The invention discloses a judging method of false path connecting condition in the packet-switching network, which is characterized by the following: increasing false path operational management and maintenance report to detect the interconnection condition of false path; receiving the report through end service equipment; responding corresponding report; regarding the false path normal among service equipments after the local end service equipment receives the respond report within preset time.

一种包交换网络中判断伪线路连接状态的方法，增加伪线路操作管理和维护报文，用于伪线路连通状态检测；本端服务设备发送所述的伪线路操作管理和维护报文，对端服务设备接收到所述的伪线路操作管理和维护报文后，回复相应的伪线路操作管理和维护报文；当本端服务设备在预设时间内收到所述回复的报文后，认为服务设备之间的伪线路正常。

MAX232 used to achieve single-chip PC with the plane between the level of conversion, a simple 3-wire connection method of communication, the upcoming PC and the single-chip to send data and receive data client-side cross-connect two of the earth Directly connected, PC-flight use of the existing serial debugging software assistant, is the use of single-chip assembly language programming.

采用MAX232实现PC机与单片机之间的电平转换，采用简单的3线制连接方法实现通信，即将PC机和单片机的发送数据端与接收数据端交叉连接，两者的地线直接相连，PC机上采用了现有的串口调试助手软件，单片机则利用汇编语言进行编程。

Said cell resorting method includes using sorting label generating module inserting time mark and serial number mark into cell, then transmitting cell from source port to target port; resorting module according to received cell carried time mark and serial number mark resorting cell enqueue information.

该信元重排序方法包括以下步骤：使用排序标签生成模块将时间标记和序号标记插入信元，然后将信元从源端口发送到目的端口；重排序模块根据在目的端口接收到的信元携带的时间标记和序号标记，重排序信元的入队信息。

This invention relates to MIMO test method in a multi-user MIMO radio communication system including: estimating the channel matrixes of all users at the base station, computing an orthogonal projecting matrix M of the interference matrix of each user and transmitting M to each user periodically, receiving data sent by the base station at the user end and getting the orthogonal projecting matrix M from the received data, transforming the MIMO test of a desired user to the minimum value of a K-element secondary convex function, in which, K expresses the number of sending antennas and getting estimation of the test data by a ball test method.

一种多用户多输入多输出无线通信系统中的MIMO检测方法，包括步骤：在基站估计所有用户的信道矩阵；计算每个用户的干扰用户矩阵的正交投影矩阵M，并将每个用户的正交投影矩阵M定期发送给每个用户；在用户端接收基站发送的数据，并从接收的数据中得到正交投影矩阵M；利用正交投影矩阵M将期望用户的MIMO检测转化为K元二次凸函数的极小值，其中K表示对期望用户而言，发送天线的个数；利用球检测的方法，得到检测数据的估计。

Through the cooperation between the fast peak detector and the delay unit,the receiver is realized with lower BER, bettter receiver sensitivity and receiver dynamic range. The output NOR gate can cancell the unwanted peak in dead spaces between packet signals.

采用前馈式结构，通过快速峰值检波电路和延时单元的协同工作，使该光突发模式接收机具有：更低的误码率、较高的接收灵敏度、又有大的光接收动态范围；在输出端采用特殊的或非门技术，消除了干扰。

Socket receive buffer, and to set the size of the tcp receive windowthat is advertized to the remote peer.

so_rcvbuf的值用来设置内部套接字接收缓冲区和通知给远端对方的tcp接收窗口的大小。

It allows each federate to declare its publishing regions and subscription regions in a routing space,in order that the exchanged data between federates can be reduced.

通过数据分发管理可以减少接收盟员接收的消息数，减轻客户端的工作量；网络传输所需的带宽。

A signal or tone sent by a receiving equipment or data set to the sending station to indicate that it is ready to accept transmission.

应答 接收设备或数据集向发送端发送的信号或音频，表示已经做好接收准备。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。