电

Luneberg lens is a spherical lens which its permittivity varies with normalized radial coordinates. It is fabricated by using different homogeneous dielectric centrically layered media. The lens can focus a parallel beam of rays from any direction exactly at a point on the surface. If it is made by adding a reflecting surface "metallic cap", it is called Luneberg lens reflector. It can reflect incident wave into plane wave in incoming direction. It is usually applied in antenna, radar reflector,satellite-based, and mobile-communucation.

龙伯球透镜为一种介电系数与半径成一固定比例的球形透镜，大部分是由数层不同介电系数介电质组合而成，而其主要特性能够把入射波聚焦到球表面一点，假使在透镜表面处镀上一圆锥角金属层即为龙伯球透镜反射器，能把入射波依平面波的型态反射回原入射端，通常用於天线、雷达、卫星通讯、军事等方面。

One summer only calculates 100 day of use The air conditioning needs to consume the electricity 8000 Yuan, the environmental protection air conditioning only needs to consume the electricity 1000 Yuan, one summer air conditioning uses the electrical bill namely may buy an environmental protection air conditioning\'***pense.

举例如：本工厂产品620－4型环保空调1天开12小时＝6.6度电1天（每小时0.55度电左右），×0.25一度电＝1台环保空调节省1.65元1天的用电量，×365天＝602，25元一年。一个夏天只计算100天使用空调需要耗电8000元，环保空调只需要耗电1000元，一个夏天空调所使用的电费即可以买一台环保空调的费用。

Crystal size of the iron based alloy foil is less than 10μm, while the crystal size of the nickel based alloy foil is about 2μm. Results show that the electrodeposited Fe-Ni foil has better magnetic properties than conventional milled Permalloy 1J79 foil.

实验表明：电沉积铁基合金箔晶粒小于10 μm，电沉积镍基合金箔晶粒大小在2 μm左右；电沉积Fe-Ni合金箔是一种性能良好的软磁材料，其基本磁性能优于传统熔铸-轧制坡莫合金1J79。

In constant torque region, the phase-independent direct torque control can be obtained by controlling the motor current of each phase without resort to vector transformation.

在恒功率运行时，本文采用相电流相位超前反电势的方法，利用绕组电抗电势削弱反电势来解决电流控制失效的问题，有效扩展了高速运行范围。

The difficulty of the existing piezoelectricity theory to solvepiezoelectric dynamics problem is pointed out.

以分析横场伸缩振动压电片的动力学为例，指出已有建立在压电本构方程基础上的求解压电体动力学理论的困难。

Dry lotus battery plus liquid behind Wen's raise, battery heating-up not very obviously, this is because dry lotus electricity's polar plate's course resist oxidation treatment, leave the factory de battery as is be in adequate electricity condition, plus liquid behind and then be OK load usage; common pole board battery, not resist oxidation treatment, negative plate be in half adequate electricity's conditions, equivalent to a part materials be in for plumbic oxide and rare sulphuric acid react bring forth plenty of quantity of heat, therefore warm long very high.

干荷电池加液后温升高，电池升温不十分明显，这是因为干荷电极板经过抗氧化处理，出厂的电池以是处于充足电状态，加液后即可负荷使用；普通极板的电池，未经抗氧化处理，负极板处于半充足电状态，相当一部分物质处于为氧化铅和稀硫酸反应产生大量的热量，因而温长很高。

Usually, equal amounts of positive and negative electricity are present and cancel each other's effect, and so we do not notice that any electricity is there at all.

因此，电是一切物质中的一个重要组成部分，在通常的情况下，等量的正负电同时并存，其作用相互抵消，因此我们根本不会注意到电的存在。

In the system of the proportional technique of the electric-hydraulics, the proportional valve is an impossible component in the system of the proportional control, and the performance of the electric-machine conversion-component will affect the performance of the entire valve. So, the conversion-component used in the electric-machine plays an important role in the wholly system.

在电液比例控制系统中，比例阀是构成比例控制系统不可缺少的元件，而电—机转换元件的性能又会影响整个阀的性能，因此电—机转换元件的性能对整个系统的性能起着至关重要的作用。

Complex permittivity includes abundant information, since its real part is the dielectric constant, and the imaginary part is proportional to conductivity.

复介电常数包含了丰富的信息，其实部即为介电率，虚部与导电率成比例；并且介电常数与很多生理参数有关，例如温度、含水量、血量、血氧浓度等。

The contact point grease has good protectiveness and steady electric performance .

研制的电触点脂具有良好的防护性和稳定的电性能，可对电触点起到良好的保护保养作用，延长电触点的使用寿命。

They go to town. Would you just ask them?

他们在城里你能问他们吗？

Ossein pretreated for a2 weeks period exhibited the maximum% yield incase of bone gelatin, while the yield from intact skin was higher than that realized incase of de-scaled skin.

预处理时间达2星期的骨胶原表现出最高的骨明胶百分产量，然而从未处理鱼皮中得到的产率比去鳞的鱼皮得到的要高。