电阻温度系数

Based on the analysis of micro -bolometer resistance -temperature characteristics, a new readout circuit was proposed. It allowed micro -bolometer operate without a temperature stabilizer over a wide range of ambient temperature. And it need a Flash memory to store the correcting factors of different temperatures and a temperature sensor to detect the ambient temperature of the micro -bolometer. By utilizing the factors in the Flash memory, Digital Analog Converter controls the micro -bolometer bias current to compensate the fluctuation of ambient temperature.

通过对微测辐射热计的电阻温度特性的分析，设计了一种新型无需温度稳定装置的读出电路，该电路的Flash存储器存储不同温度下的校正系数，温度传感器实时检测探测器的环境温度，从Flash中取出相应的温度校正系数送入数模转换器，通过DAC的电压输出来控制探测器偏流以进行环境温度补偿。

It is found that the resistivity increases linearly with temperature rising in certain range of temperature above the melting point. During subsequent calefaction, the results obviously show that a turn point appears in the resistivity-temperature curve for every composition at certain temperature.

发现在液相线以上一定的温度范围内，其电阻率随温度的升高而线性增加，即其电阻率温度系数α基本保持不变；当温度超过某一临界温度时，α随温度的升高出现异常变化。

The dependence of resistance on the curing temperature illustrated that-codoped BST was capable of exhibiting the positive temperature coefficient effect at low frequency; nevertheless,it might display the negative temperature coefficient effect at other frequencies. The relationships between the resistance and applied voltage revealed that the resistance property of-codoped BST appeared at low frequencies, but its property of capacitive reactance might present at high frequency.

阻温特性曲线显示，在低频时它显示正温度系数效应，在其它频率则显示负温度系数效应电阻与电压关系显示，低频时它呈现电阻特性，而高频时则显示容抗特性。

Furthermore, the process of proportion resistance in the feedback circuit is changed, and the change of sampling voltage with sampling resistance is compensated with resistor. The impact of environment temperature on loading capacity and peak current is reduced.

此外，对反馈环中的比例电阻采用不同的工艺制作，通过电阻的温度系数补偿由采样电阻随温度变化所造成的采样电压的变化，减小温度对电路的带负载能力和峰值电流的影响。

1 A component - a fixed resistor , Positive Temperature Coeffecient or Negative Temperature Coefficient resistor , diode , or the like - employed to limit (see 2.7) the output of a unit to withiin the required current or power levels , or otherwise used to obtain acceptable performance, shall have permanence and stability so as not to decrease its limiting capacities .

10.1 一个元件——固定电阻，正温度系数或负温度系数电阻器，二极管，或类似元件——用来限定电源单元的输出在要求的电流或功率值水平，或用来得到可接受性能，应具有持久性和稳定性，不致于减小它的限定容量。

Our main products include: Carbon Film Fixed Resistors, Metal Film Fixed Resistors, metal oxide film fixed resistor, winding fixed resistors, winding without a sense of fixed resistors, wound Fuse Fixed Resistors, fuse resistors, glass glaze film fixed resistors, cement resistors, metal-free sense resistor, the temperature fuse resistors Cement, power-ceramic tube resistor, aluminum shell wound resistor and jumper, zero ohm resistor, chip resistors, with resistors, positive temperature coefficient resistor, negative temperature coefficient thermistor and so on.

公司主要产品包括：碳膜固定电阻器、金属膜固定电阻器、金属氧化膜固定电阻器、绕线固定电阻器、绕线无感固定电阻器、绕线熔断固定电阻器、熔断电阻器、玻璃釉膜固定电阻器、水泥电阻器、金属片式无感电阻器、温度保险丝水泥电阻器、功率瓷管式电阻器、铝外壳绕线电阻器以及跳线、零欧姆电阻（ZO、晶片电阻器、排列电阻器、正温度系数热敏电阻器、负温度系数热敏电阻器等。

Based on the percolation conductive phenomena of conductive composites andPTC/NTC (Positive Temperature Coefficient /Negative Temperature Coefficient)effects of resistance, a series of new experimental phenomena and concepts of carbonfiber cement-based composites such as PPC and NPC effects, Kaiser memory effect of resistance to residualdeformation and resistance creep are found and proposed.

借鉴已有的导电复合材料渗流导电现象和电阻的正温度系数／负温度系数效应基本理论，发现和提出碳纤维水泥基复合材料电阻的正压力系数与负压力系数、电阻对材料剩余形变的Kaiser记忆效应以及电阻徐变等新的现象和新的概念。

Two Chinese Invention Patents, which titled " Manganin thin film ultra-high pressure sensors" and "Preparation method of manganin thin films with low temperature coefficient of resistance", have been applied based on the above original work of this thesis.

以上第l～3创新点及第5创新点已经分别申请了两项中国发明专利：&薄膜式锰铜超高压力传感器&和&低电阻温度系数锰铜薄膜的制备方法&。

In this work, vanadium oxide thin films were deposited by using direct current facing targets magnetron sputtering and ion beam sputtering.

氧化钒薄膜具有高的电阻温度系数，是制备微测辐射热计的理想热敏感材料。

The effects of SiO_2 substrate and Si_3N_4 substrate on composition of vanadium oxide thin films deposited using direct current facing targets magnetron sputtering at high substrate temperature were investigated.

高的电阻温度系数和良好的绝热结构是获得高性能微测辐射热计的前提。

Do not gum up the work by telling mother what we are going to do .

别告诉母亲我们要干的事，那会把事情搞糟的。

In recent years, application of the partial prestressed concrete beam s is developed.

近年来，随着部分预应力砼梁应用的推广，发现我国规范所采用的名义拉应力法的计算结果不稳定。