查询词典 temperature rise

Before the thermal field is calculated, stable temperature rises in each part of the electromagnet are unknown, so it is impossible to determine the power and convectional heat transfer coefficients at the stable temperature rise.

在进行温度场的计算之前，电磁铁各部件的稳态温升是未知量，故线圈达到稳态温升时的发热功率及对流散热系数不能确定。

In order to study the nonuniform temperature rise and thermal effect in the Yb:YAG crystal,based on the theory of semi-analytical thermal analysis and working characteristic analysis of Yb:YAG microchip with super-Gaussian beam end-pumping and back-face cooling,a new solution of heat conduction equation was introduced and the general expressions of temperature field,thermal distortion field and additional optical path differences of Yb:YAG microchip were obtained respectively.

为了研究抽运光在Yb：YAG晶体内产生的非均匀性温升以及引起的热效应问题，以半解析热分析理论为基础，结合超高斯光束端面抽运、背向冷却Yb：YAG微片工作特点分析，采用热传导方程一种新的求解方法，得出了Yb：YAG微片内部温度场、热形变场、附加光程差的半解析计算表达式。

In the analysis, firstly, the flux boundary condition is used to simulate the frictional heat resource between wheel and rail. The non-steady heat transfer between the contacting surfaces of the wheel/rail, heat-convection and radiation between the wheel/rail and the ambient were all taken into consideration. Therefore, a heat coupling model of the wheel/rail in rolling/sliding is put forward to calculate the frictional temperature rise in the wheel and rail. Secondly, after the temperature distribution of wheel/rail, due to friction, is calculated, substitute the thermal load with equivalent fictitious body force and boundary distributed force loaded on the nodes of the corresponding elements. The wheel-load is applied to the center of the wheel.

首先，用热流边界条件模拟轮轨接触界面的摩擦热源，考虑轮轨间的非稳态热传导、轮轨自由表面与环境的热对流、热辐射的影响，建立轮轨滚动接触热耦合有限元计算模型，分析计算轮轨滚、滑工况下的摩擦温升；其次，以求得的轮轨温度场结果作为求解轮轨应力场的已知条件，轮载以集中力形式直接加载于轮心处，将摩擦温升引起的热载荷等效为假想体力和热边界面力，施加于相应的单元节点上，建立了轮轨热—机械载荷耦合作用的热弹性平面应力模型，分析热—机械载荷作用下的轮轨应力场。

Temperature difference between the center and the surface of hot rolled flat after rapid cooling results in heat transfer from the center to the surface, which causes the surface temperature rise in a short time.

热轧板带钢轧后冷却过程中，由于骤冷后表面与中心的温差导致轧件内部的热量传向表面，出现表面返红现象。

Yes the lowest temperature in the temperature rise on that day or the day?

是温度最低的那天还是在温度上升的那天？

Based on the non-adiabatic temperature rise test of concrete cuboid at the field laboratory and the 3-D finite element method of concrete temperature simulation, and by using RAGA in back analysis of the concrete thermal parameters, good result is achieved.

根据现场实验室内的混凝土长方体试件非绝热温升试验，在温度场三维有限元仿真计算的基础上，运用基于实数编码的加速遗传算法对混凝土的热学特性参数进行反演分析。

A simulation of the evolving temperature field for subway station soleplate is conducted by using the adiabatic temperature rise theory of concrete based on equivalent time.

本文基于等效时间的水化热理论，求解结构温度场，并将该理论应用于地铁车站结构底板温度场的仿真计算中。

In this paper, a thermal simulation model of a LED driver was established. The thermal field and thermal stress analysis of the driver was done by using the software EFD Pro 8.2, and the temperature rise from various parts and the temperature field distribution of the PCB were obtained. By analyzing the reasons leading to overheating and unideal heat distribution, corresponding thermal simulation using an improved model was carried out. Finally, the comparison and analysis of experimental measurement results and simulation results were given.

本文基于计算流体力学中的有限体积法，建立了该变换器的热仿真模型，利用EFD Pro 8.2软件，对驱动电源内部进行了热场及热应力分析，得到了各部分的温升情况和整个电源温度场的分布情况，分析导致PCB局部过热的原因，然后针对热仿真得出的不理想的热分布情况提出了改进的方法，进行了模型改进，对PCB板上的各部分进行合理的重新布局，并再次进行了热仿真，最终得到了较为理想的结果，最后给出了实验测量结果与仿真结果的对比及分析。

The paper studies the degradation rule of physical mechanical property of vulcanizate during the period of heat ageing, which involves the relationship between the property, variable temperature and time. The analytic expressions for the frictional temperature rise of the interface were presented according to the theory of heat conduction of solid when a tire slides of rolls along the road.

本课题针对影响汽车轮胎橡胶机械性能的温度老化模型进行了一定深度的理论研究，并进一步研究轮胎的在滑动、滚动时的温度场的数学模型，在理论上论证了温度、压力是影响轮胎行使安全性能的重要因素，并以其作为最终的监测对象。

Simultaneously, the total extractible myoglobin decreased and the proportion of metmyoglobin increased significantly when the pressure above 400MPa. Beef discoloration after pressure processing may result from oxidation of ferrous myoglobin to ferric metmyoglobin, globin denaturation and structural changes. At 40℃, the changes of beef color was similar to that of room temperature's. When the temperature rise to 60℃, most of muscle proteins denatured, a small quantity of native myoglobin could not affect the color of beef significantly. Therefore, protein denaturation was attributed to the main cause of discoloration in beef muscle after pressurization at 60℃.

压力处理导致色泽变化的直接原因可能是由于二价铁的肌红蛋白氧化成三价铁的高铁肌红蛋白、球蛋白的变性及结构的变化所致。40℃时的压力处理，色泽的变化规律与室温下相似，只是色泽变化的程度更为剧烈，蛋白质变性在色泽变化中起到的作用逐渐加强。60℃下的压力处理，绝大部分蛋白质发生变性，少量未变性的肌红蛋白对色泽不会产生明显的影响，此温度的压力处理，蛋白质变性是造成肌肉失去红色的主要原因。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。