导热

Especially the alloyage technics reatly improved the heat conducting function of cooling wall.

尤其是冷却水管的合金化处理技术，在保证防渗碳效果及微量间隙的同时，使冷却壁整体热阻降低了50%以上，极大地提高了冷却壁的导热性能

Tall heat preservation is light the wallboard outside pledging with local farming, forestry discards the wood fibre such as straw, wheat straw, straw, sawdust is raw material, coefficient of thermal conductivity is less than 0.38, it is our country is in a technology at present of banner level outside wall insulation material, structural thermal resistance is as high as 2.55, thermal resistance effect is equivalent to thick the wall of bricky build by laying bricks or stones that amounts to 1.2 meters, country of energy-saving standard prep above is energy-saving 60% index.

高保温轻质外墙板以当地农、林业废弃秸秆、麦秸、稻草、锯末等木质纤维为原料，导热系数小于0.38，是我国目前处于技术领先水平的外墙保温材料，结构热阻高达2.55，热阻效果相当于厚达1.2米的砖砌墙，节能标准高于国家节能60%指标。

It has been shown that the theoretical calculative formula, which is based on fractal description, has higher precision.

这表明了基于分形理论描述的耐火纤维材料有效导热系数的计算式具有较高的表达精度。

The evaluation indexes, which sign the testing results, are put forward, the indices include the difference of calefactive ratio, the heat insulation ratio, effective thermal conductivity, compound thermal resistance and response time.

二、提出了本文所研制的测试装置测试结果的评价指标，具体指标为升温速率差、织物试样的隔热率、名义导热系数和复合热阻及温度动态响应时间。

These indexes describe the fabric's thermal properties during the heated process. The heat insulation ratio preferably manifests fabric's insulation property; the difference of calefactive ratio describes dynamic conditions average calefactive case; effective thermal conductivity and compound thermal resistance are mainly considering the wholly testing characteristics and describing the compound thermal property; the response time expresses the time of step response during dynamic testing process. 3. Dynamic heat transmitting properties of fabrics and warmth retention testing methods have been developed; many different textile materials are used for actual test, and the data are analyzed, illustrated, and compared.

这些指标从不同的侧面描述了试验过程中织物试样的传热隔热性能，其中隔热率是从整体上来考虑的指标，它较好的描述了试样的隔热保温性能；升温速率差考虑的是动态变化过程中平均升温变化情况，它的大小表现了织物热性能的差异；名义导热系数和复合热阻是从试验装置的特点出发整体来考虑的热传递指标，描述了铜板、试样、铜板三者复合时的传热性能与隔热性能；而温度动态响应时间表示动态热传递过程中趋于稳态所经历的时间。

These indexes describe the fabric"s thermal properties during the heated process. The heat insulation ratio preferably manifests fabric"s insulation property; the difference of calefactive ratio describes dynamic conditions average calefactive case; effective thermal conductivity and compound thermal resistance are mainly considering the wholly testing characteristics and describing the compound thermal property; the response time expresses the time of step response duringdynamic testing process.3. Dynamic heat transmitting properties of fabrics and warmth retention testing methods have been developed; many different textile materials are used for actual test, and the data are analyzed, illustrated, and compared.

这些指标从不同的侧面描述了试验过程中织物试样的传热隔热性能，其中隔热率是从整体上来考虑的指标，它较好的描述了试样的隔热保温性能；升温速率差考虑的是动态变化过程中平均升温变化情况，它的大小表现了织物热性能的差异；名义导热系数和复合热阻是从试验装置的特点出发整体来考虑的热传递指标，描述了铜板、试样、铜板三者复合时的传热性能与隔热性能；而温度动态响应时间表示动态热传递过程中趋于稳态所经历的时间。

By practical application,the bidirectional circumrotation/speed adjustment of motor are realized safely and reliably.The products has a small physical volume,fast heat transmission,high efficiency and can operate properly in severe environment.It can enhance the reliability of the drive circuit and the system,and adapt to both military and commercial usage.

经实际应用，该电路不仅安全可靠地实现了电机的双向转动和调速功能，且产品体积小，导热性能好，效率高；还能在恶劣的使用环境下安全工作，提高了驱动电路和系统的可靠性，适合军、民两用。

for carrying out a small physical volume and high reliability of the motor driving and control,by using hip4081 chip and aln hybrid integrated technology,a hybrid integrated technology h bridge circuit based on hip4081 is designed to control bidirectional circumrotation and speed regulation of the motor.by practical application,the bidirectional circumrotation/speed adjustment of motor are realized safely and reliably.the products has a small physical volume,fast heat transmission,high efficiency and can operate properly in severe environment.it can enhance the reliability of the drive circuit and the system,and adapt to both military and commercial usage.

摘 要：为了实现小体积、高可靠的电机驱动与控制，利用hip4081专用芯片和aln厚膜混合集成技术，设计一种基于hip4081的厚膜h桥电机驱动电路，完成了h桥式驱动电路对电机双向转动和调速的控制。经实际应用，该电路不仅安全可靠地实现了电机的双向转动和调速功能，且产品体积小，导热性能好，效率高；还能在恶劣的使用环境下安全工作，提高了驱动电路和系统的可靠性，适合军、民两用。

Because of the low thermal conductivity of coal and the slow rate of distillation, coking is a slow process.

因为煤的导热性低、蒸馏的速度慢，所以炼焦的过程较慢。

The columniform samples are made with the pressure of 150?MPa that contain graphite,Al 2O 3,SiO 2 and MgO powder.With samples heated at 1?420?℃,1?500?℃ and 1?600?℃ for 4 hours,MgAlON and 21R-AlN Sialon are synthesized by carbothermal reduction nitridation in the sample,MgAlON and 21R-AlN Sialon occure at 1?420?℃.With tempreture rising to 1?600?℃,MgAlON and 21R-AlN Sialon are increasing.

与高温氧化物相比，碳由于熔点高，热膨胀系数小，导热性好，热稳定性和化学稳定性好，不易被液态金属和熔渣润湿等特点，而成为优质耐火原料，使耐火材料在抗熔渣侵蚀和抗热震等性能方面得到质的飞跃。

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