上电

An electrical heating rope is proposed based on numerical results for improving surface temperature uniformity of the simulation spherical shell.

在数值模拟基础上，提出并试验验证了能有效提高球壳外表面温度均匀性的电加热绳方案。

A releasable spring catch on the receptacle arrests the housing after electrical contacts between the connector and the receptacle have been established.

在接插件和插孔之间建立电接通之后，插孔上的可释放弹性搭接件抵住外壳。

For the four laterals simply supported plate, the transverse deflection of plate is expanded over the modal shapes, the electroelastic model with self-sensing actuators plate is given, and the current is considered as output variable of measurement equation. Generalized modal coordinates being state variables, LQG and H∞control is proceeded using the state space equation.

将板的横向位移按模态展开，对配置压电自感作动器的薄板建立了模型，给出以广义模态坐标为状态变量的状态方程和以传感电流为输出的观测方程，在此基础上，对系统进行了LQG控制和H∞控制。

sound velocity ; temperature ; stationary wave method ; ultrasonic wave

虽然用超声波测声速具有以上优势，但实验数据的精确度在一定程度上受到超声波信号发生器的稳定性、压电陶瓷换能器的效率、周围环境温度等因素的影响。

On a 12 string pedal steel guitar, all 12 strings are tuned and played individually, not as 6 double courses as on the 12 string guitar.

在12弦的踏板电吉他上，所有的的12弦都是独立调音弹奏，而不是用12弦琴那种两两相应地调弦方式。

Moore's Law has already driven DRAM cell dimensions to a point where specialized dielectrics were required in the storage capacitor.

摩尔定律早已驱使DRAM单元在存储电容上使用特殊的介电材料。

On ultra precision lathe, author propose the principle of error in-process measurement and compensation of cylinder, end and contour, and use adjusted straightedge and sensor to build error on-line measurement and compensation control system of end turning.

研究了基于模糊数和插值原理的模糊控制算法，并用该算法实现了压电陶瓷微动刀架伺服系统的闭环控制，使其控制精度达到了±0.01μm；在超精密车床上，提出了圆柱面、端面和轮廓加工的误差在线测量与补偿原理，并利用标定的直尺和传感器建立了端面车削误差在线测量和补偿控制系统。

A strain gauge is a force-sensing element whose resistance changes in proportion to the amount of force applied to the element.

这种 张力传感器元件是检测力的元件，其电阻值与作用于其上的力成比例。

The theoretic analysis and simulation show that skin-effect heat trace is highly feasible for subsea crud oil pipeline.

理论分析及模拟计算表明，集肤效应电伴热用在海底输油管道上是可行的，并提出了在实施过程中需要注意的问题。

Transferred the NP-1 gene into C. ellipsoidea by electroporation with high efficiency expression vector pBinUΩNP1. PCR, Southern blot and Northern dot blot analysis of the G418resistant alga strains indicated the stable integration and correct transcription of NP-1 in C. ellipsoidea genome. In vitro antagonistic assays showed the proper expression of defense gene in C. ellipsoidea. Transgenic C. ellipsoidea is antagonistic to gram negative bacteria—Bacillus subtonic, gram positive bacteria—Escherichiacoli and fungi—Fusarium oxysporum to some extent.

以椭圆小球藻完整细胞为受体，采用电激转化法将连接在高效表达载体pBinUΩNP1上的兔防御素NP-1基因导入小球藻，通过PCR、Southern杂交、Northern点杂交对转基因小球藻进行了分子检测，同时通过体外离体抑菌实验检测了兔防御素NP-1基因表达产物的活性，结果表明NP-1基因已稳定整合到小球藻基因组中，并进行了正确转录和表达。

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。