查询词典 temperature gradient

The numerical calculation and simulation results show that the effect of the wall surface heat transfer on its internal temperature field is not serious, the cooling shcheme of ventilating duct can control the maximal temperature gradient on the focal surface within 0.4℃/m successfully and the characteristic structure of enclosed wall is effective on the heat transfer.

数值计算与仿真结果表明：壁面传热对其内部温度场的影响不大；利用通风管道的冷却措施可将焦面的最大温度梯度控制在0.4 ℃/m；围挡的特性结构对传热有效。

The numerical results show that, surface temperature gradient in the pool heated from inner wall is 10% higher than that heated from outer wall with a fixed temperature difference between the outer and inner walls. Meanwhile, the critical Marangoni number for the incipience of hydrothermal wave (Ma_{c}=3.06\times 10^{5}) in the pool heated from inner wall is smaller than that (Ma_{c}=3.34\times 10^{5}) heated from outer wall.

发现在内外壁间温差相同的情况下，在内壁加热的液层里，流体表面的温度梯度高于外壁加热情况下10%左右；相应地，发生热流体波的临界Marangoni 数Ma_{c}=3.06\times 10^{5}(或临界温差\Delta T_{c}=4.58K)低于外壁加热情况下的Ma_{c}=3.34\times 10^{5}(或\Delta T_{c}=5.0K)。

It is effective ways of improving iron oxide powder on surface of hot rolled steel sheet to lower strip's initial cooling temperature and reduce strip's inside and outside temperature gradient.

通过调查、统计与对比试验，分析了SN400B钢板表面氧化铁粉的成因及影响因素，指出降低带钢起始冷却温度、减少带钢内外温度梯度是改善热轧板表面氧化铁粉的有效途径。

Analyze and compares the differences of temperature gradient model and temperature stress in the domestic and international norms.

分析比较了国内外规范中温度梯度模型及其产生相应的温度应力的差别。

It was obvious that there is a thermal gradient between Central Business District and the countryside.In terms of the spatial pattern of the land brightness temperature,the most extensive UHI was distributed in Hankou,Hanyang and Wuchang.Urban heat islands distribution in Dongxi Lake,Caidian,Hannan and Jiangxia was scattered with some little heat islands.③ Interspersion and Juxtaposition Index and Percentage of like Adjacencies and Largest Patch Index were the most important factors that influence the land surface temperature.

结果表明武汉市土地利用类型的空间格局分布指数与地表温度有较好的相关性，其中地表温度与散布与并列指数、同类斑块相邻百分数指数和最大斑块所占景观面积比例指数的灰色关联度较高，说明地表温度的分布不仅受到各类型斑块与其它斑块相邻情况的影响较大，还受到最大斑块所占的总土地面积比例的影响。

The temperature gradient occurs imperatively and then influences to the image quality and resolution of the space camera. Based on the theory of optical wavefront error and combining the engineering practice, the thermal optical evaluation has been done to the optical window with non symmetric temperature field. The RMS wavefront errors of the optical window have been calculated on each typical position in orbit cycle.

文中结合工程实际，以光学波像差的基本理论为基础对空间相机光学窗口的非轴对称温度场进行了热光学评价，编程计算了空间相机光学窗口在一个轨道周期内各典型位置处的均方根波像差，并把计算结果与美国"天空实验室"光学窗口的相应数据进行比较，以验证本文热光学分析的合理性、正确性。

After the transient temperature distribution has reached dynamic equilibrium, because of radius temperature gradient periodically changing with time, the optical path difference between center and edge beam is also periodically changing with time.

当晶体温度达到周期性分布后，由于晶体径向温度梯度的周期性变化，引起通过晶体的平面光波的中心和边缘光线相对光程差也随时间作周期性变化。

The temperature of basin was influenced greatly by matle heat conduction, magmatic heat and radioelement decay during the time of Early Permian-Late Permian rifting, while in the down-warped basin from the late stage of Late Permian to the present the temperature has been greatly affected by geothermal gradient and tectogenetic transition heat.

认为早二叠世-晚二叠世早期裂谷作用阶段盆地温度主要受地幔热传导、岩浆体热和放射性元素衰变的影响，晚二叠世晚期至今坳陷盆地阶段主要受地热增温率和构造运动转化热的影响。

It was demonstrates by the simulations that the distributions of velocity and temperature was heterogeneous whether in the axial direction or on the cross section.Especially,it was also indicated clearly that gas and catalysts refluence and their temperature gradient exists"two apices"and the concentration of gasoline and diesel increases rapidly at the nozzle zone.

模拟结果表明，提升管内速度、温度无论是轴向还是在横截面上都存在明显的非均匀分布，特别是喷嘴附近，气粒回流严重，温度梯度存在双峰特征，汽油、柴油浓度迅速增长。

The distributional heterogeneity of velocity and potential temperature is the turbulence fountainhead and the turbulence intensity is proportional to the scalar product of velocity and potential temperature gradient in the non-compressed and isotropy turbulence atmosphere.

并证明湍流强度定理，不可压缩气体和各向同性湍流大气中，湍流强度正比于速度与位温梯度的标积。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了