查询词典 oscillatory circuit

The choice of the transformer includes: Main transformer use the main technique in number, capacity, model number...etc. in set data of the transformer to really settle; The electricity lord connected the line to introduce primarily the electricity lord connects the linear importance, design according to, the basic request, every kind of merit and shortcoming and lords that connect the line form connects the linear choosing more, the lord that combine to establish the in keeping with my plant the request connects the line; The short-circuit galvanometer is regarded as the most important link, this thesis introduced the calculating purpose in short-circuit electric current, assumption term, general provision, the calculation, network transformation of a parameter detailed, and each calculation etc. knowledge that short circuit order; The choice of the high pressure electricity equipments includes the mother line, high pressure breaks the road machine and insulate the switch, electric current to feels with each other the machine, electric voltage feels with each other the choice principle of the machine, high pressure switch cabinet with request, and proceed to these equipments the school check with the related introduction in product.

变压器的选择包括：主变压器的台数、容量、型号等主要技术数据的确定；电气主接线主要介绍了电气主接线的重要性、设计依据、基本要求、各种接线形式的优缺点以及主接线的比较选择，并制定了适合要求的主接线；短路电流计算是最重要的环节，本论文详细的介绍了短路电流计算的目的、假定条件、一般规定、元件参数的计算、网络变换、以及各短路点的计算等知识；高压电气设备的选择包括母线、高压断路器、隔离开关、电流互感器、电压互感器的选择原则和要求，并对这些设备进行校验和产品相关介绍。

And experiment was based on the simulation, the results show that charge circuit and uplifted circuit both was adopted the same circuit, which can realize energy bi-directional flow, also have low switch ullage and high dynamic response.

在此基础上进行了实验研究，仿真和实验结果表明，该装置升压和降压只采用同一个主电路，即可实现能量的双向流动，且具有低开关损耗和较高的动态响应。

The invention discloses an ultrahigh frequency portable reader which is based on a self-adaptive antenna array and comprises a da vinci chip. The da Vinci chip is externally connected with a USB interface, a Bluetooth interface, a liquid crystal display and at least an AD circuit which is connected with an RF circuit. The RF circuit is connected with the antenna array.

本发明公开了一种基于自适应天线阵列的超高频便携式读写器，包括达芬奇芯片，达芬奇芯片外接USB接口、蓝牙接口、液晶显示器和至少一个AD电路，AD电路上连接有RF电路，RF电路上连接有天线阵列。

Using solar cell to absorb solar energy and store into battery by DC-DC charger during daytime. When in the night, battery will be discharged to white LED by optical sensor and control circuit. Since the weather maybe cloudy or rainy, there is a spare AC power supply loop consist of transformer, bridge rectifier, filter and voltage regulator to prevent battery undercharge or circuit maintain. When the output current of battery is less than the preset value, the power source of white LED lamp will be switched over to spare AC power supply loop by the comparative and switching circuit.

用太阳能板，在日间吸收太阳光，将能源用DC-DC充电器储存於蓄电池中，夜间时由光感测控制电将蓄电池放电，提供白光LED灯所需的电源，为预防阴雨天蓄电池充电足或电故障维修，将使得灯无法点，另有市电经变压器与整稳压后之预备供电回，於蓄电池输出电低於预设值时，将白光LED灯电源换至市电预备回。

Considering the specialty of pseudo-random vector, a partial scan algorithm for BIST, which unifying the structure analysis and testability analysis, is presented in this paper. Then, the fault simulation experiments on ISCAS89 benchmark circuits by this algorithm is made, and the results, which made by the full scan algorithm and the partial scan algorithm only based on the structure analysis, is compared. The conclusion is achieved: for pseudo-random vector, compared with the full scan circuit and the circuit geted by partial scan algorithm only based on the structure analysis, the circuit geted by our partial scan algorithm can greatly reduce the test time with very close or even greater faults coverage and less area than the full scan.

考虑到伪随机测试向量的特殊性，本文借鉴确定性测试向量生成的部分扫描算法，在内建自测试环境中，提出一种综合结构分析和可测性分析的部分扫描算法，PSBAST，并运用此算法对ISCAS89 benchmark电路进行计算，并对经计算后得到的部分扫描电路进行故障模拟，最后将模拟结果与全扫描电路和一种仅考虑结构因素的部分扫描算法得到的结果进行详细分析和比较，结果表明：对于伪随机测试向量，相对于全扫描电路和由仅考虑结构因素的部分扫描算法得到的电路，本文提出的部分扫描算法得到的电路，能够在不低于全扫描结构故障覆盖率前提下，大幅度减少测试时间，并能降低测试面积开销。

This text introduce a sort of new pattern soft switch PFC circuit .First, analyze the develop course of the on-off power supply. Second, relate the harm of humorous wave to the commonality electricity net. Third, present the topology and the principium chart of the soft switch PFC and analyze it .At last ,set the parameter and simulates the converter of with matlab simulation. more over ,get the hold of well voltage and current wave , minish the spoilage of the circuit, enhance the efficience of the circuit, meet the demand of the miniaturization and viridity.

本文引入了一种新型的软开关PFC电路，首先分析了开关电源的发展历程，然后讲了谐波给公共电网造成的危害，再给出了这种软开关PFC的电路拓扑及原理图并对其工作原理进行了分析，最后对其参数进行设置在MATLAB软件进行了仿真，并得到了良好的电压电流波形，而且减小了电路的损耗，提高了电路的效率，实现了小型化，绿色化的要求。

Elect hardware, and design current to voltage translation circuit, voltage amplification circuit and acoustic-optic alarming circuit.

对硬件进行了选择，对电流/电压转换电路？电压放大电路和声光报警电路进行了具体设计？

Mainly by the design of infrared sensors, signal amplification circuit, voltage comparator, delay circuit and the audio alarm circuit.

本设计主要由红外线传感器，信号放大电路，电压比较器，延时电路和音响报警电路组成。

Circuit system used varistor constitute the Wheatstone bridge to collect small changes in voltage, After amplification circuit amplified into A / D converter circuit, the input voltage digital signal after the conversion output AT89S52 conducted by the control and data processing and results in the LCD display.

系统电路采用压敏电阻构成惠斯登电桥来采集电压的微小变化，经过放大电路放大后送入A/D转换电路，对输入电压信号进行数字量的转换后输出，由AT89S52进行系统的控制和对数据的处理并将结果显示在液晶显示器上。

This article introduced in detail does not have the electric cable to coordinate the controller the overall design and its hardware electric circuit, the software procedure: Voltage comparator, 2 frequency multipliers, synchronized clock electric circuit, 6 7SEDLED nixietube display circuit.

本文详细介绍了无电缆协调控制器的整体设计和其硬件电路软件程序其硬件电路组要有：电压比较器2倍频器同步时钟电路6位7SEDLED数码管显示电路系统软件包括：主程序子程序实现控制程序等实验表明：该无电缆协调控制器系统可以准确的对信号灯进行监控和教正，可以在一定程度上解决混合交通流的问题

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。