主要元件

The principal level for controlling gene expression is at transcription and the regulators of transcription are often DNA binding proteins that activate transcription at particular promotors or other regulator...

基因表达的调节主要在转录水平上进行，并且转录调控子多是一类DNA结合蛋白，通过其与受控基因启动子或其他调控元件的结合来调节目标基因的表达。

The principal level for controlling gene expression is at transcription and the regulators of transcription are often DNA-binding proteins that activate transcription at particular promotors or other regulatory regions.

基因表达的调节主要在转录水平上进行，并且转录调控子多是一类DNA结合蛋白，通过其与受控基因启动子或其他调控元件的结合来调节目标基因的表达。

The objective of this dissertation is to synthesize rare-earth metal complexcompounds and develop assembling techniques for fabricating ordered, highly packedand stable thin films as sensitive films of the gas-sensors and immunosensors.

本文合成了稀土元素与氮、氧的配合物，利用LB膜技术和化学自组装技术，将稀土配合物应用于化学和生物敏感元件和传感器中，主要工作如下： 1。

After analyzing and studying the over all structure of ordinary C6163 lathe, we use numerical control technology to re-equip ordinary C6163 lathe for automation and precision. We attach the numerical control device and execution elements to the lathe and choose an appropriate machinery servo-system and computer system.

摘 要：本次毕业设计的题目是 C6163型车床的经济型数控改造设计，应用数控技术对C6163普通车床进行自动化和精密化改造，改造技术主要为：在车床上附加数控装置和执行元件，选择合适的机床伺服系统和计算机系统等。

In order to record optical hologram, one must have real object, laser source, holographic vibration-proof platform, optical elements and holographic record material and the severe record environment.

早期的全息显示研究主要集中在传统的光学全息显示方面，其记录、再现的载体一般采用传统的全息记录材料，制作光学全息图时需有真实的记录物体存在，需要激光光源、全息防震平台、光学元件、全息记录材料等硬件条件，对记录环境条件也有较高的要求，这些均给全息图的制作质量与重复性带来不少问题。

Fully automatic burn free block machine adopt PLC control system, it can set the various actions through adjust the flow, press etc technique parameters by touch screen,, achieve machine-human talking, the control system mainly included three units,(1) fully automatic batching and mixing control system (2) brick forming machine, pallets transferring control system (3) stacking block machine control system

全自动砌块成型免烧砖机PLC控制系统；切块成型机的全过程采用PLC智能控制，可通过触摸屏设定各个动作的流量、压力等技术参数，实现理想的人机对话。控制系统主要包括3个控制单元组成：（1）配料搅拌全自动程序控制系统，（2）成型主机、运输板机、升、卸板机自动程序控制系统，(3)码垛机控制系统。本系统的电器元件均为进口的品牌产品，如日本三菱、欧姆龙、德国西门子等，性能可靠，故障率低。

The focus of this design is automatically drilling vertical milling machine design, including the mechanical structure design, mechanical drive system design, and the choices and design of components on a table ,it is include: screw, timing belt, and the stepper motor Selection Guides; circuit is the main elements of the last part of the design , the control unit such PLC as the main can be quickly and easily complete the task of feeding the PLC's work, and designs the principles and procedures required by the design.

本设计的重点是自动立式钻铣床的设计，包括了机械结构设计、机械传动系统的设计，并对工作台的元件进行了选择和设计：包括丝杠、同步齿形带、步进电动机和导轨的选型；最后部分则是电路设计方面的主要内容，以PLC为主体的控制单元可以快捷方便的完成进给任务，对PLC的工作原理和本设计所需要的程序进行了设计。

Main works of the author:(1) Has developed a design of charge amplifier which using a kind of integrated chip replace a large number of leave components, though all the realized proposal of measurement circuit for the piezoelectric accelerometer;(2) Has made the circuit board;(3) Has proposed a programme-controlled scheme in the sensitivity throw-over of charge convert and gain throw-over of output amplifier;(4) Has done the experiment, give the experimental result;(5) Has done the error analysis based on the experimental result and the principle of the charge amplifier.

作者完成的主要工作包括：(1)通过对压电加速度传感器的测量电路的各种实现方案的深入调研，提出了一种用集成芯片取代大量分离元件的电荷放大器的实现方案；(2)制作了完整的电路板；(3)在电荷转换部分的灵敏电容的切换和输出放大级的增益切换电路的实现上提出了程控的方案；(4)进行了实验验证，给出了实验结果；(5)在实验结果的基础上，结合电荷放大器原理对系统作了误差分析。

In this paper, the distribution of biaxial bending strength and the influence of loading rate on fatigue strength in the biaxial bending test by use of soda-lime glass specimen with micro indentation crack are studied.

一、引言在设计和使用玻璃这类脆性材料作为结构元件时，主要应考虑两个问题：材料的强度值具有很大的分散性；(2)在通常的使用环境中，材料的强度会随加载时间的延长而降低〔'。

It is also made of lining, insulation, heating components, stainless steel vacuum tank, covered with Holding Furnace, microcomputer procedures, such as automatic temperature control system components.

主要由炉体外壳钢结构总成，炉衬，保温层，发热元件，不锈钢真空罐，内保温炉盖，微电脑程序自动控温系统等组成。

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。