温度梯度

The transient natural convection and natural convective heat and mass transfer under constant-flux condition were also studied respectively. In experimental research, the electrochemical method was used to analogize natural convection in a porous enclosure.

在实验研究中，采用电化学方法，在多孔介质封闭腔体的两竖壁间建立浓度梯度和温度梯度，实验测量了腔体内的温度分布和电极间的极限电流，以此确定了总体的传热系数和传质系数。

The simulation floating zone modelwith zero temperature gradient in the middle of the hot rod is proposed to simulate thehalf part of the full floating zone convection,since the temperature gradient in the middleof a full floating zone approaches zero.

根据加热方式的不同，可以将半浮区液桥分为通常半浮区液桥模型、模拟半浮区模型以及改型半浮区模型。通常半浮区液桥模型，液桥热端材料一般选择为金属材料，使得热端温度分布均匀。液桥产生热毛细对流时，在液桥热端内侧存在较大的轴向温度梯度。而在全浮区热毛细对流中，浮区中间的轴向温度梯度在对称条件下应该接近于零。

That is, we can consider the raised temperature a single impulse and predict the ambient temperature and temperature gradient of the sediments by fitting with the cylindrical temperature decay function.

另外我们也发现直接从温度梯度的资料用该函数来推求最终之背景温度梯度的方法又优於先用该函数推求背景温度再求背景梯度的方法。

During construction, typical sections are selected to carry out the temperature field test and the elevation of girder of T structure is measured synchronously. The changing character of temperature gradient and its 2 key parameters are generalized and the deflexion of"T"structure is analyzed in view of temperature field.

在施工过程中，选取典型断面进行了温度场试验，并对最大悬臂状态的T构主梁的线形进行了同步观测，总结了温度梯度及其两个主要参数的变化规律，将三维温度场问题简化为一维温度梯度问题。

Considering that the temperature gradient through thickness is much higher than that through width and length of plate, in this model, the governing equation of heat transfer was simplified as a one dimensional differential equation, and the series function solution for temperature is established in Lagrangian coordinate setting.

在该模型中，考虑到轧件厚度方向的温度梯度远大于沿宽度和长度方向的温度梯度，因而将热传导方程简化为一维微分方程，基于拉格朗日坐标建立了温度场的级数解法。

When the stress/strain induced by the gradient during temperature cycles needs to be known, the temperature changes inconsistently, and has gradient in space.

需要知道温度变化过程中由于温度梯度产生的应力、应变时，认为温度场是瞬态的，在空间上存在梯度。

The frictional heat energy was concentrated on the thermal effect layer with the thickness of 4 mm, The temperature gradient of contact surface is the highest, and decreased rapidly with the radius direction of the lining's groove. The temperature gradient and TEL's thickness increased with the increasing of the sliding speed. The temperature decreased rapidly with the radius direction and also with the increasing of center angle of the lining's groove. The sliding speed and distance are obtained under two sliding conditions when the lining fails, which supply the theoretical basis with the antislip design of friction hoist.

摩擦热量集中在热影响表面层，其厚度仅为4mm，接触表面温度梯度最大，沿绳槽径向迅速减小；温度梯度和热影响表面层厚度随相对滑速的增大而增大；衬垫温度沿径向急剧降低且随圆心角增大而减小；并得到了2种滑动工况下衬垫失效时的相对滑速和滑动距离，为摩擦提升防滑设计提供理论依据。

The influence rule to powder quality and quantity from some technical parameters such as materials vapor tension, gas pressure, the ratio between hydrogen and argon, current intensity and gas circulate intensity were discussed by single-factor experiment, on the base of which the perpendicularity experiment scheme was arranged.

本文采用压力模型计算出稳定弧光制粉时的气相空间温度在373K以下；从电流密度和电导率角度计算出等离子体电弧场中心温度高达5000-6500K；由此得出弱电离等离子体自由弧的自身温度场即使没有外界强制冷却，在等离子体焰区特征半径(约1.26cm)范围内的温度梯度就可达4787℃/cm，这是电弧等离子体温度场分布高度集中的具体表现，也是纳米金属粉末无须液氮冷却就能生成的本质原因，阐释了等离子体温度场自身的极大温度梯度是金属粉体纳米化的控制机制。

In the article a optical system was developed by the newest RC microscope with the schlieren method, which made the figure of appearance excellent colour and lustre and fine third dimension. The special cylindrical and cubic crystal growth cell was designed and the temperature-control system was developed to cooperate with the cell. Radial thermal gradient was formed in the cylindrical cell while transverse thermal gradient in the cubic cell, which was prepared for finding new effects.

在实验中首次采用最新式的浮雕相衬显微镜和纹影法光路相结合的方法，使得实时观察到的形貌图有良好的色泽和三维立体感；自行设计了柱型和方型两种型号的晶体生长室，研制了适合这两种晶体生长室的温度控制系统，在柱型晶体生长室中形成中心径向的温度梯度，在方型晶体生长室中形成横向的温度梯度，从而为发现新效应创造条件。

After comparing the measured and standard propose temperature gradient mode on temperature effect of the thin-wall and high-pier. We get a result that the inner forced is less influced by the effects of measured temperature gradient mode. This article has carried on linear stability analysis and nonlinear stability analysis of the bridge largest cantilever.

本文以试验研究为基础，测试了背景工程典型薄壁高墩结构在日照作用下的温度分布，并初步探索了薄壁高墩结构的温度梯度模式，比较了实测与规范建议的两种温度梯度模式对薄壁高墩结构产生的温度效应影响，结果表明实测温度梯度模式的温度效应对内力的影响比较小。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。