大功率的

The coating with higher thermal conductivity shows a better thermolysis property.

研究大功率LED灯的发热规律，找到更好的散热办法是一个急待解决的问题[6，7]。

The effect of thermal conductive coating on the thermolysis property of LED lamps with different color and packing number used in a close under-water environment was studied.

1引言散热是限制发光二极管功率提高的主要因素之一[1~9]。特别是在一些特殊和恶劣环境，如水下密闭环境下使用的大功率LED灯具的散热尤为突出。

Because of the use of novel technique of mode choosing and shape modifying to the high power infrared diode laser,and of manipulating the trap with dual-lens scanning, the tweezer is easy to be constructed and operated.

由于采用了独特的对大功率多模红外激光选模整形和双透镜陷阱操纵技术等性能价格最优化选择，该系统易于构建，陷阱操作方便，其构建价格仅一般光镊的几十分之一，非常适合光镊技术的推广和一般实验室构建。

But the size and weight of large scale wind turbines become a problem because of the limit of traditional technology.

但是，受传统风机技术的限制，大功率发电机的尺寸和重量给陆上运输和安装都带来了很大的困难。

This article first introduced designs the high efficiency cocurrent voltage-stabilized source's composition structure and the control principle, and on the power source main circuit, the control circuit, the protection circuit as well as the control system software's design did have analyzed in detail.

本文首先介绍了所设计的大功率直流稳压电源的组成结构和控制原理，并就电源主电路、控制电路、保护电路以及控制系统软件的设计做了详细地分析。

The coupling efficiency and alignment tolerance between the high power single emitter broad area diode laser and thecylindrical lensed multimode fiber has been discussed in the forth chapter; in addition, the simulation and the experiment have been done to support the theoretical results.

第四章详细讨论了利用柱状楔形微透镜多模光纤与大功率宽发射域半导体激光器的耦合效率；同样利用计算机辅助模拟了耦合过程，并通过实验验证了耦合系统的可行性，讨论了其在三维方向的容忍度。

There is abrupt phase change in nonsinusoidal waves modulation. It can easily produce impulse current and bring large difficulty to high-power emission system; so it is not beneficial to holding the orthogonality between the orthogonal pulses and demodulating information.

非正弦波调制信号存在相位突变，在工程实践中易产生较大的冲击电流，给大功率发射系统带来较大困难；而且相位不连续也不利于保持正交脉冲间的正交性，不利于信息的正确解调。

The parameters of the control system were collectecd by photoelectrical seclusion to avoid the disturbing of the electromagnetism in welding.

在控制过程中的参量采集均通过光电隔离，避免了大功率焊机在焊接过程中的电磁干扰对控制系统的影响。

Photoemissive materials are now used forgenerating high brightness electron bea■s.Drivenby short-pulsed laser,these new cathodes willmeet the requirment of large rf-driven freeelectron lasers.

为了满足射频直线加速器及其驱动的大功率自由电子激光器研究的需要，以脉冲激光激发光电发射材料产生高亮度电子束的研究正日益受到重视。

The result was shown: With input power increasing, the temperature, the pressure and the flow are increasing. As the highest input power 115W is charged, the smallest thermoresistance is 0.55℃/W, the highest pressure is 4.15bar, the highest temperature on the surface of radiator is 78.5℃, the optimal charge ratio is 80%～100%, under this station the biggest flow is 12g,the smallest charge ratio is 60%.

结果表明：随着输入功率的增加，散热装置的温度、压力和流量都在增加，当输入最大功率115W时，该散热装置的最小换热热阻为0.55℃/W，最大工作压力达4.15bar，电子元器件最大表面温度74.5℃，最佳充液率为80%～100%，此时最大工质流量为12g，最小充液率60%。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。