放大

The pharos is controlled by reliable program. Working status data is collected in real time. A two-stage amplifier is used to sense the current signal. VHF transmitter-receiver is used as the means of communication, which is working at 233. 3MHZ. GPS data is collected to calculate the latitude and longitude valued of the pharos. Sleep mode is used to reduce the energy consumption. Auto alarm function and watch dog function are integrated to maintain its stability and reliability.

在用高性能8位处理器68HC908SR12设计的新型遥控遥测航标灯中，充分利用了处理器的功能，实现了对灯器的程序化控制，实时进行数据采集，采用了两级放大器对电流信号进行放大，采用VHF电台进行远程通信，对GPS定位数据进行采集和处理，为了降低功耗实现了定时和睡眠控制，为保证工作稳定性和可靠性，启动了故障处理、自动报警功能，以及看门狗功能。

PID temperature control of the C51 subroutine, the program where the temperature has been magnified 100 times, when the temperature near the control point by adding integral control, integral phase done right corresponding restraint.

详细说明： PID温度控制的C51子程序，程序里的温度被放大了100倍，在温度接近控制点时才加入积分控制，对积分相做了相应的限制处理。

Therelationship of the amount of catalyst and the ee% of product was seen to be negative nonlin-ear. Catalyst 3 was used in the enantioselective addition of diethylzinc to aromatic aldehydesand gave good results. The configuration of products was determined by the configuration ofthe catalysts' chiral carbon linked with hydroxy group. Using β- amino alcohols bearing only one chiral center as catalysts for the enantiose-lective addition were studied. D-N, N-dialkyl-2-amino butanol gave poor catalytic effect be-cause of their structure. The configuration of the product is the same as the catalyst. Anotherkind of β- amino alcohols - phenylglycine derivatives and valine derivatives have chiralcenter on the carbon linked with amino group. Catalyzed by-phenylglycine derivatives 6,7, 9, 10, the reactions gave satisfied results. The optical yields exceeded 80%.

在探讨了含有两个手性中心的β-氨基醇之后，选择了只有一个手性中心的β-氨基醇，一是手性中心为连羟基的手性碳原子：D-N，N-二烷基-2-氨基丁醇；二是手性中心为连氨基的手性碳原子：D-苯基甘氨酸衍生物和L-缬氨酸衍生物。D-2-氨基丁醇的催化效果不太好，这与其结构的空间位阻较小有关系，反应产物与连羟基手性碳构型一致；由苯基甘氨酸和缬氨酸出发合成五种β-氨基醇6-10，研究了不同ee％的-6作用下的二乙基锌-苯甲醛加成反应，发现该催化剂具有不对称放大效应；-7，9，lO的催化效果也比较令人满意，光学产率80％以上，所得产物构型与催化剂构型一致。

The preamplifier which functions as a digital AV control center which does not perform any signal magnification as a preamplifier, but unifies all program sauce other than Phono.

前置放大器的作用是作为一个数字影音控制中心不执行任何信号的前置放大器放大，但所有程序统一调味以外唱机。

I went to a photo shop to have my picture enlarged.

我到照相馆把我的照片放大。

It is shown as a photocell amplifier in the following section.

运算放大器使用指南电流——电压转换电路的用途不限于电流的测量上，还可以用在例如后面的光电池放大电路中。

Amplifiers for photoconductive, photodiode and photovoltaic cells are shown in Figures 14, 15, 16 respectively.

光电放大器用于放大由光电导、光电二极管和光电池所得到的光强度信号，如图14、15、16。

Of both speed and linearity. It is obvious that the current through a photoconductive cell

光电放大器用于放大由光电导、光电二极管和光电池所得到的光强度信号，如图 14

According to the characteristics of a HgCdTe photoconductive detector, a preamplifier with a constant current bias circuit is designed.

本文从HgCdTe光导探测器的工作特性出发，设计了等效内阻很高的恒流偏置低噪声前置放大电路。

Also shown are the arrays of LEDs used for exciting the energy-magnifying coils to become photoconductive.

同时显示该阵列的LED用于令人振奋的能量放大线圈，成为光电。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。