结构元件

The transformation between digital signal and DC voltage was made with D/A converser and high voltage amplifier; varactor s were used for tuning components; the bandpass filter was a combline microstrip line one, its dimension was presented.

采用数模转换器和高压运放实现数字信号与直流电压的转换；以变容二极管作为调谐元件；带通滤波器采用梳状微带线结构，并给出了结构参数。

The Periscope Drawtube will be bent because of the water resistance in sailing and this bend will cause the error of star measurement. Due to its especial structure, contactless measurement is the only way to measure its bend degree. First this paper introduces the method by linear array CCD based on structure and light path; Second it expatiates linear array CCD work principle and driving scheduling with example of TCD1501C and the driving circuit by CPLD. The output signal of linear array CCD includes common disturbance so the differential amplifier is needed. In order to make the signal adapt to computer processing, a threshold circuit with Schmitt characteristic and the data process following threshold are given. At last, some key problems in application are given.

潜艇潜望镜的镜筒在航行时受到水的阻力会产生弯曲变形，这种变形会造成潜艇对星体测量的误差；由于镜筒结构的特殊性，对其弯曲程度的测量只能采用非接触方法；首先从结构和光路方面介绍采用线阵CCD作为检测元件实现对镜筒弯曲程度的测量；其次以东芝公司的线阵CCD（TCD1501C）为例阐述了其工作原理及驱动时序的控制要点，并介绍了基于可编程逻辑器件的线阵CCD的驱动电路；线阵CCD输出的信号中含有共模干扰，必须采用差分放大器将其抑制；为将信号转化为适合计算机处理的数字信号，文中给出了有一定实用价值具有施密特特性的二值化处理电路及二值化后的数据处理过程；最后阐述了在实际使用中的一些关键问题。

It adopts full stainless steel as its material with nice appearance and compact structure, it brings convenience for operating and can be applied for the cleaning of electric parts, mechanism, chrono parts, horologe parts ,weather parts iatric mach s parts, new material and glass etc.

设备 采用全不锈钢结构，外形美观、结构紧凑、操作方便、适用于电子、机械、精密零件、钟表元件、光学器件、医疗器械、新材料、玻璃器皿的清洗。

In the interest of getting good performance of speed and loading capability of the micro motor, at the same time ensuring the high rotary resolution, put forward a kind of new precise rotary motor using piezoelectric stack as actuating element based on inchworm motion.

为了保证微小型电机的速度和承载能力，同时获得较高的运转分辨率，提出一种以压电叠堆为驱动元件基于尺蠖运动原理的新型精密旋转电机方案。电机结构中转子无绕线结构，定子采用柔性铰链双侧对钳方式交替对转子起到钳位作用。

A 2-D coded GA is proposed to design the matching network composed of lumped components. The topology and component parameters of the matching network are optimized simultaneously. The network optimized by employing the 2-D coded GA shows better frequency response compared with the network synthesis method and the real frequency method. The thesis also employs the GAs to microwave measurement.

为了解决宽带匹配网络的设计问题，提出了一种二维结构的编码方案，采用这种形式的编码同时对网络结构和元件参数进行优化，成功地设计出性能优良的匹配网络，通过与综合法、实频法的设计结果相比较，表明遗传算法设计出的匹配网络性能更优，特别是在寻找新的网络拓扑结构方面，遗传算法具有更大的优势。

The analysis of loss characteristics for nonideal waveguiding structures is one of the most important practical problems in microwave engineering.

引 言导波结构的损耗与由该结构组成的元件及系统性能的优劣直接相关，因此对它的精确计算在微波工程中占有十分重要的地位。

To understand the properties of the transfer function of parallel tube-manifold system in wind tunnel test,an analysis is made of several parameters related to the transfer function on the basis of the dissipative model with some qualitative rules on perallel tube-manifold system obtained.

风洞刚性模型测压试验是获得建筑结构风荷载的重要方法。刚性模型的测压管路系统一般包括模型表面的金属短管及连接金属管和传感器的PVC管等管道元件。为了得到结构风压的完整信息，应在模型表面布置尽可能密集的测点。

In this paper, some fundamental problems in the vibration control of flexible structures using piezoelectric ceramics are studied.

采用自适应结构的原理和方法，对压电元件用于挠性结构振动控制的一些问题进行了探讨。

And this paper makes use of SQL Server 2005 to realize the topological structure of rural power distribution network.

摘 要：本文在分析农村配电网络拓扑结构的基础上，结合GIS的数据特点，采用面向对象的方法分析了网络元件的拓扑关系，并用SQL Server 2005设计实现了农村配电网络的拓扑结构。

After short introdution about the mathematics model of the semiconductor pressure sensor, it was described that was the holistic design thought of the sensor which reserched into, from the format design, the separated retia slice, sensitive orgen of strucsure and the overall design thought for stucsure point of design.

在简要介绍了半导体压力传感器的数学模型后，从版图、隔离膜片、敏感元件的结构、整体结构等方面的设计，阐述了对所研制的传感器的整体设计思想。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。