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temperature controlling
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  temperature controlling
Average strengths in tension of 2.75×109 N/m2 (400×103 lb f/in.2) are reported using this temperature controlling method compared with 2.5×109 N/m2 (360×103 lb f/in.2) for similar diameter material grown using a constant power mode system.
      
A melt temperature controlling device, dependent on the infra-red emitted from the melt area at which the filament is withdrawn, was developed and used to grow filament of constant diameter in the growth rate range 2.5 to 7.5 cm/min.
      
In the developed model, the optimization module of the water distribution of secondary cooling zone was established according to the metallurgical criterion for billet and target temperature controlling principle.
      
In order to achieve that some modifications on temperature controlling and measunng systems have been introduced.
      


The stabling center frequency technology for transmitter in wavelength devision multiplexing system is very important. The stabling center frequency technology by temperature feedback method in high speed wavelength devision multiplexing system (2.5 Gbit/s) is studied. According to the technology principle, the high precision automatic temperature controlling module for 2.5 Gbit/s transmitter has designed and experimentalized. The module has stabled the center frequency of laser diode(LD) by controlling...

The stabling center frequency technology for transmitter in wavelength devision multiplexing system is very important. The stabling center frequency technology by temperature feedback method in high speed wavelength devision multiplexing system (2.5 Gbit/s) is studied. According to the technology principle, the high precision automatic temperature controlling module for 2.5 Gbit/s transmitter has designed and experimentalized. The module has stabled the center frequency of laser diode(LD) by controlling it's temperature. It has supplied the light source with the characteristic of stabling center frequency for wavelength devision multiplexing system application.

波分复用系统光源中心频率的稳定技术是该系统的关键技术之一。本文研究了高速率 (以 2 .5Gbit/s速率为例 )波分复用系统中光发射模块中心频率的稳定技术—温度反馈稳频技术。根据温度反馈稳频技术原理 ,作者设计并调试了高精度自动控温模块。该控温模块通过控制 2 .5Gbit/s光发射模块中激光器管芯温度来稳定其中心频率 ,为波分复用系统的应用提供了具备稳定中心频率特性的光源。

>=The variety range of environment temperature is very big on the outdoors experiment the field' s high tower in the four seasons of a year. It would affect seriously the normal usage of millimeter wave radiometer. The paper introduced the characteristics of the receiver that is directly enlarge; analyzed the every kind of factor that cause the variety of work temperature of the receiver, and the variety produced the influence to the function of the millimeter wave radiometer; give the project of electric circuit...

>=The variety range of environment temperature is very big on the outdoors experiment the field' s high tower in the four seasons of a year. It would affect seriously the normal usage of millimeter wave radiometer. The paper introduced the characteristics of the receiver that is directly enlarge; analyzed the every kind of factor that cause the variety of work temperature of the receiver, and the variety produced the influence to the function of the millimeter wave radiometer; give the project of electric circuit and machine construction for the temperature controlling system that can increase or lower the work temperature of the receiver. The system passed to experiment, and the result is good.

在一年四季中,室外试验场高塔测量平台的环境温度变化范围很大,它将严重影响毫米波辐射计的正常使用。本文介绍了直放式毫米波辐射计接收机的特点,分析了引起接收机工作温度变化的各种因素和工作温度变化对毫米波辐射计性能所带来的影响,给出了包含升高和降低接收机工作温度的温度控制系统的电路和机械结构设计方案。系统经过试验效果良好。

 
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