导热

A transient thermal coupling model of certain internal combustion engine exhaust valve train was built, transient thermal-field distribution of the valve was simulated, and the effect of the thermal conductivity to the thermal-field was discussed.

通过建立某发动机排气门组瞬态热分析藕合模型，对排气门进行瞬态温度场有限元模拟，并探讨导热系数对气门温度场的影响。

The design of the leads unit, low thermal resistance and high electrical isolation heat intercept connection, stability of HTS current leads, optimum design of conduction cooled current leads is analyzed in detail.

对引线单元的结构设计、引线的导热绝缘冷却结构、稳定性等问题，以及传导冷却的铜电流引线优化设计进行了详细分析和计算。

The printed circuit board has in one side several flat-bottom notches with conductive layer and one conductor plug penetrating the printed circuit board and in the other side one heat conducting layer connected to the conductor plug.

其中，印刷电路板的一面具有多个平底凹杯，平底凹杯的底部为一平面，平底凹杯上具有一导体层，且平底凹杯的底部下方还具有一导体插塞贯穿印刷电路板，而印刷电路板的另一面则具有一导热层与导体插塞连接。

The calculation results show that the temperature of the valve cone changes periodically, leading to thermal stress changes periodically, which is the main reason of the valve cone pit corrosion; the operating temperature of the valve can be reduced by using the higher thermal conductivity materials; at the Same time, 3-D FEM provides a good theoretical basis in the process of the design and improvement for the parts of ICE.

计算结果表明：气门锥面处周期性的温度变化，会导致周期性变化的热应力，是导致气门锥面疲劳点蚀的主要原因；采用较高导热系数的材料可降低气门的工作温度；同时，三维有限元法能为内燃机零部件的进一步设计改进提供很好的理论依据。

He relations of the thermal conductivity coefficient and density of rock - mineral cotton insulating materials andtemperature are studied by means of steady - state method.

用稳态法研究岩矿棉隔热材料导热系数与密度及温度的关系。

The defects in the inner wall of three dimensional hollow cylinder-shaped equipment are calculated by means of infrared technique and solution of inverse heat conduction, and correctness of the solution is proven.

阐述了用红外技术与求解导热反问题相结合对三维圆柱形工业设备内部缺陷进行定量计算的方法，从理论上证明了求解的可行性。

The effect of boric acid on carbon fiber properties and thermal conductivity of carbon carbon composites was investigated by dipping preform in boric acid before pretreatment.

在预制体炭纤维预石墨化前对其进行硼酸处理，研究硼酸对炭纤维性能，C/C复合材料导热率的影响及其作用机理。

The effect of boric acid on carbon fiber properties and thermal conductivity of carbon carbon composites was investigated by dipping preform in boric acid before pretreatment.

摘 要：在预制体炭纤维预石墨化前对其进行硼酸处理，研究硼酸对炭纤维性能，C/C复合材料导热率的影响及其作用机理。

The equation for the membrane thickness controlling in hot dipping process is deduced using abridged kinetic model process.

利用简化的动态模型过程，推导热浸镀条件下的膜层厚度控制方程，并通过实验手段对此方程作了验证。

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。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐