查询词典 circuit

What this paper finished mainly work as follows: Five-phase hybrid step motor driver system with fixed-chopping frequency and constant total current driving is fully described. Mathematical model of the system, included the current control circuit, power driving circuit and five-phase hybrid stepping motor is established. The steady modeling of the system is established and studied. Based on the steady modeling of the system, dynamic modeling of the system is studied and single step response characteristic is constructed with MATLAB/Simulink. The simulation results, which is certified by the theory analysis, coincide with the theory analysis.

本文主要完成的工作包括几个方面：对五相混合式步进电动机恒频斩波恒总流驱动系统进行了完整的描述；建立了包括电流控制电路、功率驱动电路以及五相混合式步进电动机在内的恒频斩波恒总流驱动系统的完整的数学模型；基于MATLAB/Simulink建立了恒频斩波恒总流驱动系统稳态仿真模型，并进行了仿真；在建立其稳态仿真模型的基础上，对动态模型进行研究，并借助于MATLAB/Simulink工具建立了恒频斩波恒总流驱动系统单步响应特性的仿真模型并对其单步响应特性进行了仿真研究，仿真结果与理论分析相符。

From the aspects of economy,use,precision and so on,introduces the characteristics and foot s function of dual time -base NE556 integrated circuit,and applies it on the capacitance sampling measunement circuit.

从经济、使用、精确等角度出发，介绍了双时基 NE 556集成电路的特点与引脚功能，并在电容采测电路中进行了应用。

Company products are widely used in industrial, petroleum, chemical industry, civil construction and other fields, the main products include circuit breakers, leakage circuit breakers, surge protection, load at isolating switch and fuse group, dual power, soft start , The number of electricity meters and pressure transmitter, and so on, all the products produced by both state-level laboratory type testing, access to the CCC certification, measurement apparatus permits, the Ministry of Public Security sales permits and in 2002 passed the ISO9001 - 2000 quality system certification.

公司产品广泛应用于工业、石油、化工、民用建筑等领域，主要产品有断路器、漏电断路器、电涌保护器、负荷隔隔离开关及熔断器组、双电源、软起动、电力数字仪表及压力变送器等，公司生产的所有产品均通过国家级实验室型式试验，获得了CCC认证、计量器具许可证、公安部销售许可证，并于2002年率先通过了ISO9001-2000质量体系认证。

Following the dual principle of the circuit theories,the dual network of mutual inductance network ,the concept of mutual capacitance,and the dual relation of mutual capacitance and mutual indutance are analysed and substantiated,and the decoupling equivalent circuit of mutual capacitance is discussed as well.

从电路理论对偶原理出发，分析论证了互感网络的对偶网路、互电容的概念及互电容与互电感的对偶关系，并探讨了互电容的去耦等效电路。

In the area of power device condition maintenance, research in our country focuses on large devices, such as transformer and dynamotor, but weak in circuit breaker"s condition maintenance and diagnose. There are some problems in the existing on-line monitoring system: a few of monitoring quantity and functions, lacking systemic orgnization and integration, a few of analytic method, and lacking methematic methods and techniques to identify circuit breaker"s running condition.

我国对于电力设备状态检修的研究多集中于变压器，发电机一类的大型设备，对于断路器的状态监测和诊断的研究还处于起步阶段，现有的在线监测系统中普遍存在以下问题：监测量少，功能单一，缺乏系统性和综合性；采用的分析方法少，对断路器的运行状态的识别缺乏有效的数学方法和技术手段。

With the development of intergrated circuit , it is difficult to test the complicated circuit quickly and efficaciously used traditional test method.

随着集成电路的发展，传统的测试方法已经很难对复杂电路进行高速有效的测试。

Then, the theory of El circuit emulation and the realization of hardware circuit are introduced in detail.

然后详细地介绍了E1电路仿真的原理及硬件电路的具体实现。

The front-end portion of a compiler, consisting of a parser and an elaborator, processes the input circuit and builds an internal representation of the circuit.

仿真器的前端部分处理输入电路并构建电路的内部表示，它包含一个'''分析器'''和一个'''确立器'''。

This block includes the following circuits: the pulse swallow circuit and data sampling circuit, a lead-lag phase detector, a loop filter, a clock multiplexer and an elastic buffer.

整个数据恢复电路包括以下模块：脉冲吸收与数据采样电路，超前滞后鉴相器，环路滤波电路，时钟选通电路以及弹性缓存。

Circuit A circuit is a path for an electric current across a potential.

电路 电路是电流通过电势的路径。

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。