上电

According to these theories, a special mechanical test platform is established, the design and debugging of the temperature signal processing board are finished and the data acquisition and analysis system about the High speed motorized spindle is established based on the PC and data acquisition card.

在上述理论研究的基础上，搭建了高速电主轴专用的机械平台，完成了温度信号调理板的设计与调试，并构建了基于PC+数据采集卡的高速电主轴数据采集及分析系统。

After this paper analyzes the importance of Green Illumination in the field of energy saving and environmental protection, the disadvantages and advantages of electronic lamp-house productions in both here and abroad is proposed at present. The high-pressured sodium lamp is the challenging production in all of the electrical lamp-house productions .So energy saving of the high-pressured sodium lamp becomes a important part of China Green Illumination.

本文首先在分析"绿色照明计划"在节能及环保领域中的重要性的基础上，对国内外照明电光源系统存在的问题作了分析，指出高压钠灯是众多照明产品中最具发展潜力的电光源产品，而高压钠灯的调光节能技术必将成为"中国绿色照明工程"中重要的一部分。

Based on the current continuity equation, using spherical harmonic function expansion, where lower boundary condition is the surface atmospheric electric potential, upper boundary condition is the electric potential of the bottom of the ionosphere, and non-homogeneous current source function of the vertical dipole assumptions is used for the charging of thunderstorms, the state analytical solution of global atmospheric electricity model in lower atmosphere is gotten.

本文从电流连续方程出发，采用球谐函数展开法，边界条件采用下边界为地表大气电势，上边界为电离层底部电势，非齐次电流源函数项采用垂直偶极子假设。

The series expansion for the potential distribution in whole space with the potential distribution on the symmetric axis is derived,some examples are given.

提出了求解轴对称静电场的柱函数展开法，推导出用对称轴上的电势分布表示空间电势分布的级数展开式，并给出了求解轴对称静电场的例子

Firstly, according to Curie principle, the symmetry of the order parameter is decided by using the symmetry of the crystal before and after phase transition.

在居里原理的基础上，以PZT晶体、钛酸锶晶体和反铁电的简立方晶格模型为例研究了反铁电相变的序参量。

When you mount the piezoelectric disk on a target structure, it serves as a simple force sensor and accelerometer by producing a voltage that's directly proportional to the force acting parallel to the disk's direction of polarization.

当安放在目标结构上时，压电片成为简单的压力传感器和加速度计，产生正比于压力且平行于压电片极化方向的电压。

Based on the analysis of thermal sources of the electric transmission and the work status of main parts,the heat dissipated from each of the thermal sources was estimated,the preliminary computation of the heat balance was conducted.

基于对电传动冷却系统热源及其工作情况的分析，估算了各热源需要散发的热量，进行了初步热平衡计算，在此基础上提出了适应装甲车辆电传动情况冷却系统结构方案，该方案由高、低温循环回路组成。

The third rail system uses a "shoe" to collect the current on the train.

第三轨系统在列车上使用"集电靴"受电。

The performance of piezoelectric materials affects and restricts the development of ultrasonic motors to a great degree.

压电材料是超声电机的核心，压电材料性能的优劣在很大程度上影响和制约着超声电机的发展。

This is because nitrogen reduces the sheet resistance in source/drain regions and has large transconductance.

其原因是氟离子造成汲极╱源极上的片电阻值变小，使得转移电导变大。

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。