thermal constant

This thesis focused on plastic packaging, research the following questions: 1., Analysis of plastic reliability problems by thermal shock test, constant temperature and humidity testing, pressure cooker test. 2.

以塑料封装为重点，研究以下问题：1.通过冷热冲击试验、恒温恒湿试验、压力锅试验等可靠性试验，分析塑封可靠性问题。

The development threshold and thermal constant of immature stage are 12. 48' C and 217. 39 day-degrees respectively.

整个未成熟期的发育起点温度为12.48℃，有效积温217.39日·度。

Its developmental duration decreases with the increased temperature. The development zero and effective thermal constant are 11. 33 ℃ and 234.04 day-degrees, respectively.

发育历期随温度升高而缩短，发育起点温度和有效积温分别为11.33℃和345.05日度。

This paper introduces a real-time method of correction for thermal imaging system with constant temperature source.

提出了一种利用恒温源对红外热像仪进行实时温度校正的方法。

The High-low temperature test box was used to apply thermal load to sample W-Al and Al-W, with a range of-40-120 ℃, a cycle of 120 minutes and total five loading cycles. And the temperature at the most values retained constant for 15 minutes. 4.

采用高低温综合试验箱对样品W-Al和Al-W施加热载荷，温度范围为-40-120℃，循环周期为120分钟，在最值温度处均保持恒温15分钟，共加载5个周期。

For constant fin width, the heat sink with the highest fins has the best thermal performance.

在固定散热片宽度的条件下, 高度最高的散热片有最佳的散热效果.

The thermal reation rate constant for carboplatin in different solvent was worked out, and the thermal substitution of carboplatin-NaCl aqueous solution and its mechanism by acid was also discussed.

用分光光度法测定在氯化钠水溶液中的热反应速率常数和低pH下的速率常数，探讨其反应和酸催化机理。

The activation energy of thermal relaxation of dipoles for main-chain segmental motion in amorphous region was decreased linearly and the time constant of dipolar thermal relaxation was increased exponentially with increasing of crystallinity.

被冻结的分子主链段偶极热松弛活化能随结晶度增大线性减小，热松弛时间常数则随结晶度的提高而呈指数增大。

The effects of urea thermal decomposition rate constant, initial particle diameter and exhaust flow rate on the calculation results are examined to further verify reasonableness of the model.

分析了尿素热解反应速率常数、喷雾初始粒子直径、排气流速对计算结果的影响，进一步验证了文中所选模型的合理性。

Polyimide ( PI) had been widely used in electric industries because of their outstanding characteristics, such as excellent tensile strength and modulus, low thermal expansivity and dielectric constant ε, good insulation capacity and good resistance to organic solvents.

聚酰亚胺因为其优异的性能被广泛的应用于电气工业，例如高强度与高模量，低热膨胀系数和介电常数，优异的绝缘性能和耐溶剂性。

Secondly, through deep-analyzing the heat transfer process of cryogenic tank, put forward the calculation method of the interspace average temperature assuming that the apparent thermal conductivity is a constant.

其次，深入分析了低温储罐的传热过程，在假设表观导热系数的前提下，提出了夹层平均温度的计算方法。

Theoretical Calculation and Experimental Research on Thermal Time Constant of Single-core Cables

单芯电缆热时间常数的理论计算与试验研究

In order to achieve low thermal expansion constant, we properly designed different compositions of the CaO-Al2O3-SiO2 ( CAS) glass and prepared the glass by high temperature molten method.

为实现较低的热膨胀系数，我们设计了不同的钙铝硼硅玻璃组分并通过熔融法制备了玻璃。

The method to calculate thermal time constant and allowable overload time of dry-type transformer is presented. The calculating example with Excel is given.

提出了干式变压器热时间常数和允许过载时间的计算方法，给出了运用Excel的计算实例。

Then the control system for boring the non-cylinder pin hole of piston was developed, whose main function modules including displacement ( detection,) temperature detection for thermal deformation compensation, constant current power and ( central) control unit.

然后研制了活塞异形销孔加工控制系统，包括主控、位移检测、热变形补偿温度检测和恒流源驱动等功能模块。

Using the formula, the thin film parameters, such as Seebeck coefficient, thermal diffusion constant, and laser penetrating depth, can be estimated indirectly.

依据该公式，可以对薄膜的一些参量如Seebeck系数、热扩散常量、光穿透深度等进行间接的测量。

Studies on the developmental threshold temperature and thermal constant of Rhopalosiphum padi ( Linnaeus) at variable temperature

变温条件下禾谷缢管蚜发育起点温度和有效积温研究

A constant temp and thermal insulation tableware of the utility model can lead eats to keep thermal insulation and constant temp, which leads the eats delicious.

本实用新型的恒温保温餐具，可以使饭菜保温、恒温，并使其味道鲜美。

Taking A/ Dvantage of thermal resistance through the constant current source putting the temperature into voltage, and then by 24-bit high-precision A/ D converter a convenient digital signal imported into DSP.

硬件的实现是利用热敏电阻通过恒流源激发将温度值转化为电压值，经24位的高精度A/D转换器，转化为便于处理的数字信号提供给DSP。

Incoloy alloy 903 is a precipitation hardened Ni-Fe-Co alloy with outstanding characteristics: low coefficient of thermal expansion, nearly constant modulus of elasticity and higher strength.

Incoloy903合金系沉淀强化型Ni-Fe-Co基合金，它具有低的热膨胀系数，几乎恒定的弹性模量和较高的强度。

After sputtering with N-Cr, a microstructure of temperature-sensitive sensor was formed, and its character of R-T and thermal response time constant were measured.

然后在微桥上溅射镍&铬电阻薄膜，形成温敏传感器微结构，并对其温度电阻特性，热响应时间进行了测量。

Through adjusting parameters of oil temperature, water content and stirring speed correctly, viscosity of watered heavy oil is measured by rotating viscometer, water content is obtained by thermal extraction with constant temperature, and water droplet size and distribution are characterized by microscopy.

通过对油温、掺水量和搅拌速度等参数进行合理调节，采用旋转粘度计测定掺水重油粘度、热恒温萃取测定掺水量、显微镜法测水珠粒径及分布。

The dielectric constant and thermal expansion coefficient of samples increase with the increase of ZnO content.

样品的介电常数和膨胀系数随着氧化锌的增加而增加.

Temperature data in transformer core during heating up under no-load test are analysed, and mathematical model for temperature rise curves at some test points established, thermal time constant in its expression assumed as a linear function of time.

分析了变压器空载试验时铁心温升过程的温度数据，得出试验点温升曲线的数学模型，其表达式中热时间常数为时间的一次函数，而试验点的极限温升可直接求出。

The Response Time Index ( RTI) which is a parameter of sprinkler actuation represents the thermal time constant for the heat-responsive element of an automatic sprinkler and the square root of the associated gas velocity.

反映洒水喷头动作速度的指标&响应时间指数RTI，是由洒水喷头热敏感元件的时间常数和气体流速的平方根决定的。

Studies on predicting the optimum control period by the thermal constant for the tea looper, Ectropis obliqua Warren

有效积温法预测茶尺蠖防治适期的研究

It is made clear through the theoretical analysis that the frequency shift is dependent on the modulation frequency, thermal time constant, bias current of the laser diode and so on.

理论分析表明频移幅度与调制频率、时间常数和半导体激光器的偏置电流等物理量有关。

Testing of Thermal Constant of Isostatic Pressed Metal Beryllium Material

等静压金属铍材热常数测试

We present a novel automatic compensation method in which a Sagnac loop filter is fixed to a material with a large thermal expansion constant.

提出了对双折射光纤Sagnac滤波器的自动补偿方案，将其粘贴在大热膨胀系数的基底材料上，使双折射光纤Sagnac滤波器自动补偿其光谱波长对温度产生的漂移。

The 25 μ m pixel architecture profits from the low thermal time constant which characterizes our technology, to design a higher pixel thermal insulation and therefore to develop a 25 μ m version from the well mastered 35 μ m technology.

25μm像元结构得益于较小的热时间常数，该技术使我们能够设计出更高的热隔离性能，从而能以35μm技术为基础开发出25μm技术。