查询词典 temperature gradient

The directional solidification under negative temperature gradient with unstrained cooling and superrefined directional microstructure are observed.

并在△T〓≤△T＜△T〓过冷度区间完成了无外界冷速约束的负温度梯度下的定向凝固，获得了快速凝固条件下的超细定向组织。

The invention preheats and strengthens heating to a test part by the composite induction device on the same heating power, thereby improving the temperature gradient, limiting the overheating at the front of the interface along the smaller area, simplifying the processing parameter, acquiring the higher cooling speed, improving the mechanical properties of the material.

本发明是在同一个加热电源上通过一个复合感应加热装置对试件预加热和强化加热，提高了温度梯度，将过热局限在界面前沿较小的区域，简化了工艺参数，获得较高的冷却速率，提高了材料的力学性能。

Therefore, it is very important to study on high nitrogen content diamond synthesis in HPHT condition.In this study, we use a cubic anvil HPHT apparatus. Using catalysts, graphite and addition of NaN3, large green single crystal diamond with high nitrogen concentration is firstly synthesized by temperature gradient method.

本文使用国产六面项压机，首次用不同触媒(FeNiMnCo、FeNiCo)+C+不同比例的添加剂NaN3合成出具有完整晶型的优质深绿色高氮含量宝石级金刚石单晶，研究了NaN3对宝石级金刚石中氮含量及生长行为的影响。

Using simple boundary condition, the temperature gradient along the z direction is a constant while the generative internal heat is not considered.

仅从顶表面耗散热量的情况下，不考虑对辐射的吸收，晶体中轴向温度梯度为恒值。

Using simple boundary condition, the temperature gradient along the z direction is a constant while the generative internal heat is not considered.

用导热微分方程描述晶体中温度场时，把吸收的辐射热当做晶体产生的内热，方程从Laplace形式变为Posson形式。

Japan-Tefeno-Shikano methodis considered as an effective method of improving the qualities of heavy forgings. But the traditional JTS processing is complex, and it causes material damage of forging surface. So a new method is proposed, which requires only one-dimensional temperature gradient and the flat anvils to avoid the disadvantages mentioned above.

在大锻件的锻造过程中，为了锻合缺陷，提高锻件内部质量，采用中心压实法可以起到较好的效果，但是由于传统中心压实法锻造的操作复杂，工况较差，而且锻件表面容易产生压伤和折叠等问题，所以提出一种新的中心压实法―一维温差中心压实法，即只对锻件上下表面强制冷却，建立一维的不均匀温度场，采用平砧进行锻造，从而避免上述问题。

Their directional solidification is carried out by either Czochralski technology in the water-cooled copper crucibles or floating zone method without crucible, but the temperature gradient is not high with these two methods.

其定向凝固或者是在水冷铜坩埚内采用Czochralski技术进行，或者是采用不需要坩埚的悬浮区熔法实现，但这两种方法都不能得到较高的温度梯度。

Also, the results indicate that it is not necessary to control over the temperature gradient of the undercooled liquid by human beings within the directional solidification undercooling range; and that even single crystals can be obtained by point trigging at the end of the samples.

在定向凝固的过冷度范围内，无需人为控制固液界面前沿的温度梯度，而且，以点触发试样端部，可以获得单晶。

In our "Specifications for Highway Pavement Design", codes on parameter of temperature gradient of cement concrete surfacings are not very rational.

我国《公路路面设计规范》对水泥混凝土路面设计温度梯度的规定很不合理。

We have carried out the fundamental research in the following respects: Substrate stress redistribution is analyzed in vacuum evaporating deposition, A model was built to confirm that the gravitational stress formed by sustain and thermal stress induced by temperature gradient influence little to optical element figure after deposition.

首先，对真空蒸镀过程中，基底自身应力的分布状态变化进行了分析。通过建模分析表明，由装夹产生的基底自重应力和温度梯度形成的热应力对镀膜元件的面形影响很小，可忽略不计。

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％。