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In this paper, the duplex solder joints geometry of flip chip is simulated by Surface Evolver program.

摘 要：本文采用 Surface Evolver 软件对倒装焊复合焊点的几何形态进行了模拟。

in the paper, solder joint shape is predicted through inputting data files to surface evolver software. then the flip-chip solder joints shape can be formed by the software.

本文通过用于焊点形态预测软件surface evolver的输入数据文件，得到倒装焊焊点形态。

The design of field electric executer based on CAN bus is given,which uses AT89C51 as the control chip.The sys-tem is composed of signal acquisition module,motor driver module,communication module,power module and so on,and re-alizes local PID control and digital communication.

在基地式CAN总线电动执行器的设计中选用AT89C51为控制核心，该系统主要由信号采集模块、电机驱动模块、CAN通信模块、电源模块及键盘显示等部分构成，实现现场的PID控制及数字通信功能。

To one complex or the function formidable pronunciation, the imagery processing system needs to be very big, different memory storage space, to solve the I/O insufficient problem, we use the W29C040 chip to expand SPCE061The memory to realize the bigger spatial memory.

对一个复杂或功能强大的语音，图象处理系统需要很大的，不同的存储器（ROM，FLASH，SRAM）的存储空间，为了解决I/O不够的问题，我们使用W29C040芯片来扩展SPCE061A的存储器来实现更大空间的存储。

The design for the crossroads traffic lights control system design, hardware to its 8031 MCU core, and on that basis to expand the program memory 2764, static RAM 6264, addresses the use of latches 74LS373 expansion I / O parallel interface chip 8255A.

本次设计为十字路口交通灯控制系统设计，硬件部分它以8031单片机为核心，并在此基础上扩展了程序存储器2764、静态数据存储器6264，利用地址锁存器74LS373扩展I/O并行接口芯片8255A。

Accomplishing system topological structure design, off-chip memory space was expanded, CAN bus and distributed control network was realized.

在系统拓扑结构设计的基础上，实现了DSP片外存储单元的扩展，实现了通过CAN总线与整车分布式控制网络的通讯。

On the other hand,the processor chip can be expansible to improve its flexibility.

另外，处理器芯片在规模上可以很容易地进行扩展应用，提高了处理器的灵活性。

This paper mainly introduces its characteristics, functions and applications, as illustrated by PCI9054 interface chip, the development of PCI bus expansion card hardware framework map, and finally give a simple example.

详细说明： PCI9054是PLX公司推出的一种PCI主模式桥芯片。本文主要介绍了它的特性、功能及应用，说明了以PCI9054作为接口芯片，开发PCI总线扩展卡的硬件框架图，最后给出一个简单的实例。

On the other hand, the capacity of the chip card expansion, all the private company's data privacy and confidentiality requirements higher, then there are the invention of the computer lock.

另一方面，由于芯片卡的容量不断扩充，大家对于私人隐私及公司的数据保密要求更高，遂有计算机锁的发明。

The past, so this design, in general there are two ways: expansion of a program is single-chip design, while another is through the use of specialized voice processing chips.

以往做这方面的设计，一般有两个途径：一种方案是单片机扩展设计，另一种就是借助于专门的语音处理芯片。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。