和电路

This paper presents a stepper motor drive control system design, including its clock pulse circuit, pulse distributor, and the drive circuit and power supply design.

摘 要：本文介绍了一种步进电机驱动控制系统设计方案，包括其时钟脉冲电路、脉冲分配器、以及驱动电路和供电电源的设计。

To improve the speed and efficiency of combinational logic circuit design, this paper presented a Game Genetic Algorithm.

为了有效提高组合逻辑电路进化设计的速度和效率，提出了一种基于博弈遗传算法的电路进化设计算法。

In this dissertation, firstly, the theories and methods about chaos control and chaotic optimization are studied. Based above, some new approaches for chaos control and chaotic optimization are proposed. Furthermore, the application of chaotic optimization for test generation of combinational logic circuits is investigated in detail, and new methods for test generation are proposed based on chaotic optimization.

本论文在对混沌控制与混沌优化的相关理论和方法进行较为全面、系统的研究基础上，提出了一些新的混沌控制与混沌优化方法，并针对混沌优化与混沌神经网络在组合电路测试生成问题中的应用展开了详细研究，提出了基于混沌优化的组合电路测试生成方法，得到了有价值的成果。

And methods of modification are proposed, which are mainly presented on clamping circuit and method of compensating for the errors of count results. Thus the performance of system can get further improvement.

在测试过程中，发现了现有实现技术的某些不足，并有针对性的提出了改进，主要体现在计时电路中的钳位电路设计和脉宽补偿思想，有利于进一步改善系统性能。

The whole system is made up of main circuit and control circuit.

整个系统由主电路和控制电路两部分组成。

The power circuit, the control circuit and the experimental results are provided.

提供了其功率电路和控制电路，给出了试验结果。

Two part of the hardware used in the experiment are main circuit and the control circuit.

本研究的实验装置包括主电路和控制电路。

In these 3 kinds of circuit, slip rheostat is different to the characteristic of circuit control and influence.

在这三种电路中，滑动变阻器对电路控制和影响的特征不同。

According to the whole scheme, the main circuit and the control circuit are designed.

按照总体方案，设计了系统的主电路和控制电路。

Especially, the technology of Automatic Gain Control and signal processing are studied which are key factors working on the performance of the receiver. Based on analyzing the theory of automatic Gain Control, operational amplifiers 0P37 and logarithmic D/Aconverter AD7111A are used to design variable gain amplifiers which can be controlled numerally, A/D convector LTC1405 is Used to test the echo, Complex Programmable Logic device is used for controller, and an arithmetic is designed for automatic Gain Control which is simulated and analyzed in order to test its feasibility.

本文在分析自动增益控制AGC原理的基础上，采用集成运放OP37和数控增益衰减器AD7111A设计可数字控制的可变增益运放模块；采用高速A／D转换器LTC1405作为回波信号检测模块；采用复杂可编程逻辑器件CPLD作为核心控制模块，构成数字自动增益控制电路，并设计粗调和细调步进控制相结合的算法，对回波信号的增益进行精确而快速的调节控制，使回波信号振幅快速稳定在设计指标范围内，利于接收机后续信号处理电路对回波信号作进一步的处理。

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。