查询词典 light source

Shadow effect can not be neglected for thermal analysis of spacecraft,Accroding to the angle between solar light and antenna orbit plane and its orbit location,analytical geometry method was used for accurately calculating solar radiation heat flux distribution of reflector surfaces.To analyze the temperature field under heat flux,the formulations of net radiation flux density between two gray elements and the net flux density of gray surface under external thermal flux were deduced.Based on the characteristic of space environment,the nonlinear temperature distribution in transverse direction of reflector shell self radiation were considered,the finite element formulations were given for orthogonal material layered shell by Galerkin method.A layered element including a inner heat source layer was proposed,and the finite element formulation expressed by DOF of the inner heat source layer were put forward with temperature and heat flux boundarys between adjacent layer.

单馈反射面赋形天线是未来星载天线发展的一个重要形式，分析了基于物理光学、几何光学和几何绕射理论的理想反射面辐射场；介绍了基于几何光学的反射面天线赋形方法；针对赋形过程中辐射场的快速分析要求，比较分析了基于物理光学的Fourier-Bessel和Jacobi-Bessel级数展开方法以及GB展开分析方法；利用GB展开快速分析方法在20GHz频率下对0.6m口径的天线进行赋形分析，实现中国大陆的30dB增益覆盖，通过数值计算研究了固定增益期望下的口径尺寸随频率的变化，以及频率为20GHz的不同尺寸天线赋形后的覆盖目标区域最大增益的变化情况。

The optimum carbon source of the pathogen for the hypha growth and conidiophore bearing was amylomaltose, the optimum nitrogen source was yeast extract and the alternation of light and darkness could promote the hypha growth.

菌丝生长及产孢的最适碳源为麦芽糖，最适氮源为酵母膏，光暗交替有利于菌丝的生长。

The exterior of the product is of double-globe shape, light-transmittable shade and luminous source is closed in with round high-transparent organic glass shade, and double luminous sources are adopted; the above is a lighting main lamp and a auxiliary light-changeable lamp of cylinder shape is at the below. The entire light fixture full of modern air and practical value is the product with comparatively more favorable ratio of function and price.

本产品外型设计采用双圆形灯具造形，透光罩和光源用高透明度有机玻璃园罩封闭，并采用了双光源系统；一只照明主灯在上，一只变光圆柱副灯在下，当天黑后主副灯同时开始工作，深夜副灯关闭，主灯工作至天亮自动关闭，整个灯具极具现代气派和实用价值，是目前太阳能灯具中有较高性能/价格比的产品。

In conclusion, we find that the speed of light in a vacuum has a constant value regardless of the movement of the observer (our observations from the moving Earth), or the movement of the source of light (our observations of light emitted from the moving pion).

在这个结论中，我们发现真空中的光速有着恒定值，不管观察者的如何运动（我们的观察是在运动的地球上），也不管光源如何运动（我们观察的光由运动的介子发出）。

Led light-emitting diodes; pure blue light; pure green; white light; backlight source; lawn lamp; Way Safety Lights

本着以"诚信务实"为经营理念，为客户提供高品质的产品和优质的服务。

"Let there be light" in the phrase "light" refers to the "sunlight or solar light", the sun is all on Earth Plant the source of animal life.

"要有光"这句中的"光"指的就是"太阳光或太阳系的光"，太阳是地球上一切动物植物生命的源泉。

"Bible" on the "Genesis"- God created."Let there be light" in the phrase "light" refers to the "sunlight or solar light", the sun is all on Earth Plant the source of animal life.

《圣经》中关于"创世记"——神的创造"要有光"这句中的"光"指的就是"太阳光或太阳系的光"，太阳是地球上一切动物植物生命的源泉。

And this paper also shows the structure and parameters of the optical system. The Xenon light of super high voltage is used as interferential source. The position of it is on the focus of the reflector of ellipsoid surface. After reflecting, its lights form a collective point . This point and objective focus of collimation lens are superposition. Though the collimation lens, the beam of light become parallel lights. Then though the Coude Reflector and radiation system of special prism, the lights become a beam of light with 3 ° emanative angle.

该光学系统选用超高压氙灯作光源，使其位于椭球面反射镜的一个焦点上，发出的光线经椭球面反射后所形成的汇聚点与准直负透镜组的物方焦点重合，光束经准直系统后变为平行光束，此平行光束再经库德反射镜和特殊发散棱镜系统，形成具有3°发散角的发散光束，用来干扰敌方设备。

The recharge has designed with protect,while insent the output jack to electrical source,show green light,then insert the input jack to the lamp's recharge holl, show red light,it means work,Hours latter gree light again,it's full of the battery.

充电器内置充电保护装置，当充电器输入端接通电源指示灯为绿色，插入电筒充电孔后，指示灯为红色表示正在充电，电池充满电后指示灯又转换为绿色。

Based on one-cycle control having such merits as anti-perturbation of source, fast dynamic response, robustness, constant frequency, but when converter works in light load its power factor becomes very poor. The modified OCC was proposed, adopting feed-forward compensation control improves influence of power factor at light load, further study adopting independence saw tooth wave completely eliminate influence of power factor at light load.

基于单周期控制有源前端变换器具有抗电源扰动能力强、动态响应快、鲁棒性强、恒频控制等优点，但在轻载时变换器的功率因数变差，提出了改进OCC策略，采用前馈补偿控制改善轻载时对功率因数的影响，进一步研究采用独立的锯齿波电路完全消除轻载时对功率因数的影响，建立改进OCCAFE变换器的数学模型。

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。