异步传输

Use Asynchronous data transmission, and to provide examples, vc can be applied directly to the development environment.

利用SOCKET实现异步数据传输，并提供实例分析，可以直接应用于vc开发环境中。

What is a characteristic of asynchronous data transmission?

什麼是异步资料传输的特徵？

The asynchronous message transmission is the effective solution to the open system.

开发系统的一个解决方案是实现应用程序之间的异步消息传输。

Asynchronous data transmission vhdl reality requires specific design requirements of the people can contact me.

异步数据传输vhdl实现，需要具体设计要求的人能可以联系我。

The most obvious disadvantage of asynchronous data transmission is the need for a start, parity, and stop bit for each transmitted character.

对于一个传送的字符，异步数据传输都需要起始位、奇偶校验和停止位，这是它最明显的缺点。

The last element of a character designed for asynchronous serial transmission, used to insure recognition of the next start element

在异步串行传输中，一个字符中的最后码元，用以确保可以识别下一个起始码元。

The two modes described above can be used in synchronous and asynchronous mode.

前面叙述的两种模式都可以用在同步与异步的传输模式。

Firstly, oscilloscope control system based on GPIB technique is presented with friendly operation environment to the HIFU system, and it uses multithreading technique in programming to realize real-time recording and display of the signal; Secondly, temperature collection and data recording system is designed, which also could get real-time recording and display of the 16 channel temperature signal, and it's believed to be of great use for further experiments of the HIFU system; Thirdly, multiple ultrasonic phased array's phase shifter is designed,which could provide 8-bit phase control in a range of frequency where the centrical frequency is 1MHZ. Fourthly, the module of serial communication is realized to insure the communication between devices and computer, including both synchronous and asynchronous communication, which enables the system to transfer data reliably and stably; Finally, the module of digital quantity control is accomplished, which provide for upper application the consistent solution to the control of exterior devices via digital interface. It can get or set the devices state using interrupt mode to receive input signal or send output signal.

主要有以下几个方面：设计了基于GPIB的示波器控制系统，给课题的研究工作提供了一个良好的环境，它采用了多线程编程的方法，能够较好的实时显示当前波形并记录数据；设计了温度采集和数据记录系统，能够对16路温度信号进行并行同步的实时采集，用于HIFU剂量学研究中温度场检测和医疗评价；设计了相控阵相位延时电路并且通过调试，满足了课题的相位控制的要求，在中心频率为1MHZ左右的频率范围内都能够达到8-bit相位控制；实现了串口通讯模块，为各项设备与计算机之间的通讯提供保证，它提供同步和异步的通讯能力，使系统能够可靠稳定的传输数据；建立了数字量控制模块，为上层应用程序提供一致的方法使用数字接口控制外部仪器，它使用中断的方式来接收输入或输出设定的开关量信号，从而得到或设定各种仪器的状态。

FIFO edge also can act as a data buffer when there is more data than the program can be processed.

这种边不仅解决了异步数据传输的问题，而且在外部数据流暂时高于内部处理速度的情况下起到了缓冲器的作用。

During the design of VXI-bus Serial Controller Module, the functions of VXI-bus including time-sequence for VXI interface, resource management, interrupt process, bus arbitration, are accomplished. To advance the performance and stability, the FPGA technic is used to implement the kerneled code including serial bus time-sequence switching to VXI interface time-sequence, the UART, the Parameterized Baud Generator and"Pipeling frame". The handle type of Data Transfer Bus for VXI-bus is researched thoroughly, and the format of serial data transfer is designed.

在VXI总线串行控制器设计中，实现了VXI总线控制器的基本功能，包括VXI总线接口时序、总线仲裁、超时处理等；同时利用先进的FPGA技术实现了串行总线时序向VXI总线时序的转换、通用异步收发器、参数化波特率发生器、流水线结构等功能模块；在设计中还深入研究了VXI总线数据传输的各种操作类型，制定了串行数据传输的编码格式。

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。