异步传输

Because of the importance of data transfer, this paper anlyzes and explains the mechanism of three methods of data tansfer by turn. They are synchronization, asynchronism and subscription mechanism.

由于数据传输的重要性，本文对数据传输的三种方法：同步、异步和订阅式机制进行了比较详细的论述。

To improve performance in these areas, this paper proposes a full asynchronous serial transmission converter for network-on-chips.

针对传统片上网络路由器之间互连线过多，传输功耗大的缺陷，提出了一种用于全异步片上网络的串行传输转换器。

According to actual condition, a model of wall thickness of rotary kiln is established. The constant coefficients in the model, including thermal conductivity, heat transfer coefficient, Fourier coefficient and contact resistance, are closely calculated. A formula of contact resistance is draw from a great deal of data of surface and inner temperature of rotary kiln. The wall thickness of rotary kiln is simulated by MATLAB. The simulation result is transmitted from MATLAB to DELPHI through a group of interface functions compiled by VC++. The basic graphs-circle and line are analyzed by the means of the technique of Visualization in Scientific Computing and the Bresenham arithmetic, and are realized the visualization of the wall thickness. The contents of communication between master computer and slaver computer are designed and the error control technique, the idea of multi-thread and the embedded assembly language are applied to realize the temperature data transmission and graph transmission, which largely improved the speed of transmission and the reliability and stability of system.

建立了符合现场实际的回转窑壁厚数学模型；结合现场采用红外测温仪测量所得的温度数据和回转窑的实际结构数据，确定出适合该模型的定常系数(包括导热系数、换热系数、傅立叶系数、接触热阻等)，并得出与回转窑工况的相近的接触热阻公式ln=T~(0.5154)-36.7868；利用MATLAB软件仿真出回转窑壁厚，并将运算结果通过在VC++的编译环境下编译出MATLAB和DELPHI的接口函数传输到该监测系统中，实现了温度数据的转换和交换；运用科学计算可视化技术和Bresenham扫描转换算法对基本图形——圆和直线进行分析，从而实现了仿真后的壁厚数据可视化；在研究异步串行通信方式的基础上，设计了该系统上下位机功能和通信内容，并运用差错控制技术、多线程思想以及嵌入式汇编语言实现了温度数据和图形数据在上下位机之间的远程传输，提高了数据传输的速率和系统的可靠性、稳定性。

A standard developed to meet the requirements of portable consumer imaging and multimedia applications — what the IEEE refers to as the standard for High Rate Wireless Personal Area Networks.(The IEEE defines High Rate as 20 Mbps or better.) It is based on a centralized and connection-oriented ad-hoc networking topology. The standard also supports peer-to-peer connectivity and isochronous and asynchronous data.

802.15.3标准的开发主要用于满足便携式用户成像和多媒体应用的需求。802.15.3标准也就是IEEE所指的高速无线个人局域网标准，IEEE规定其传输速率不低于20Mbps.802.15.3标准建立在一个集中的，面向连接的特别的网络拓扑基础，支持对等连接和同步、异步数据传输。

Compared with the synchronous time division multiplexing techniques which rigidly link service to resource, the asynchronous technique has the advantage of occupying the transmission link only in proportion to the exact requirement.

与同步时分复用技术相比，同步复用技术僵硬的将业务与传输资源相连，而异步技术的优势是根据其确切的需要来占用传输链路。

Due to its proruption characteristic,Available-Bit-Rate traffic flow in Asynchronous Transfer Mode networks often causes network overloaded and,more seriously,causes network congestion sometimes.

针对异步传输模式网络可利用比特率业务流多数都具有突发性，往往会造成网络过载。

In asynchronous transmission,the unit of modulation rate corresponding to one unit interval per second; that is, if the duration of the unit interval is 20 milliseconds , the modulation rate is 50 bauds

异步传输中调制速率的单位，相当于每秒一个单位间

Each 8031 microcomputer contains a high speed full duplex (means you can simultaneously use the same port for both transmitting and receiving purposes) serial port which is software configurable in 4 basic modes: 8 bit UART; 9 bit UART; Interprocessor Communications link or as shift register I/O expander. For the standard serial communication facility, 8031 can be programmed for UART operations and can be connected with regular personal computers, teletype writers, modem at data rates between 122 bauds and 31 kilobauds.

每8031微机包含高速全双工（意味着你可以同时使用相同的端口都发射和接收的目的）的串口是软件配置在4基本模式： 8位异步； 9位异步；整合通信链路或移我登记/海外扩张为标准的串行通信设备， 8031可以编程为异步操作，可与普通的个人电脑， teletype作家，在现代数据传输率之间的122波特和31 kilobauds 。

It is safer to send asynchronously and design your code around the onreadystatechange event!

这对于异步传输以及onreadystatechange事件的编码设计来说都是非常安全的！

His problem can be solved by adopting parameter configuring and TPCR model. The TPCR IP core is made up of the padded delay cell and re-synchronization cell. The padded delay cell specifies and restricts the interface timing of the IP core, making it possible for the SOC designers to estimate the margin of the interface timing at every design stage and making the IP core integrated in SOC seamlessly without the glued logic. The re-synchronization cell bridges different clock domains and asynchronous signals, ensuring that IP core carries out the transfer of the asynchronous signals.

PCR IP核模型由弹性延迟单元和再同步单元组成，其中，弹性延迟单元规范了IP核的接口时序约束，使得SOC集成者能够在设计的各个阶段，估算IP核的时序裕度，并能够在集成时无缝集成到SOC中而无需加入粘合逻辑；而再同步单元增加了IP核接口在不同时钟域和异步信号之间的桥接功能，保证IP核能够可靠地完成异步数据的传输。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。