查询词典 alternating current

Philip Swallow has, in fact, flown before; but so seldom, and at such long intervals, that on each occasion he suffers the same trauma, an alternating current offear and re-assurance that charges and relaxes his system in a persistent and exhausting rhythm.

其实，菲利普·斯沃娄以前也坐过飞机，但次数之少，隔的时间之长，使他每次都感到同样的精神折磨：恐惧和释然感轮番袭来，不断使他的神经一会儿紧张，一会儿放松，直搞得他精疲力尽。

It transfers the slip power to mechanical power and then feed the power back to the shaft of the motor, or directly feeds the slip power to the alternating current net, so as to ensure the speed regulation a higher performance and higher power utilization ratio.

它可以把转差率转变为机械功率反馈回电动机机械轴上，或把转差功率反馈至交流电网中，使得具有良好的调速性能和较好的功率利用性。

In the alternating current bridge methods generally speaking, both of these calculations are randomly used and may sometimes cause trouble during bridge circuit analysis.

在交流电桥法中，一般是不太讲究这两种统一运算的，因而在桥路的分析上往往带来某些不必要的麻烦。

Capacitive reactance is a reactance due to the presence of capacitance in an alternating-current circuit.

容抗是指交流电路中由于存在电容而产生的电抗。

The preparing process is described as follows:(1) the raw materials are dispersed in the solvent;(2) the solution is arranged between two electrodes;(3) alternating current with a voltage of 5 V-100V and a frequency of 10Hz-1000Hz is applied to both ends of the electrodes for 5minutes to one hour;(4) the product obtained after being washed with deionized water and pump filtrated or after centrifugal treatment is dried by being heated to 40 centigrade to 100 centigrade to get the nanometer grain, wherein the raw materials in the first step are micrometer materials or nanometer materials such as sulphide, selenide, telluride and oxide; without special requirement on shape or appearance, the materials can be in the shape of a rod, a fork, a star, a block or a sphere; the solvent in the first step can be water, ethanol, acetone, benzene or tetra chloromethane.

步骤为：1将原料分散于溶剂中；2使制成的溶液处于两电极之间；3在电极两端的加交流电，电压为5V-100V，频率为10Hz-1000Hz，时间为5min-1h；将产物用去离子水洗涤、抽滤，或进行离心处理后；4将所得到产物加热到40～100℃进行干燥，得到纳米颗粒。步骤1中原料为硫化物、硒化物、碲化物、氧化物等微米或纳米材料，其形貌不限，可以为棒状、枝状、星状、块状、球形等多种形状。步骤1中的溶剂可以为水、乙醇、丙酮、苯或四氯化碳。

AVO analysis is suggested for solving to solve the difficulty in identification of thin alternating layers in exploration of oilfields. It can improve the current method that has no thickness variable in the formula of reflective and is limited by sampling rates in calculation of the coefficient in the time of domain. Using the relationship of stress and displacement on two interfaces, this paper derives the spectrum of reflective coefficient for any incidence angle and thiekness of thim layer based on the equation of seismic wave propagation in the frequency domain.

针对油气田开发中薄互层认识难的问题，提出从AVO分析解决困难，克服现有方法在反射系数公式中无厚度变量、时间域计算反射系数谱受采样率限制的不足，运用两个界面间位移与应力关系，从频率域地震波传播方程推导了任意入射角和薄层厚度下的反射系数谱。

The module of Zone Abnormal noise Processing ofOMEGA sps is an effective mothod of suppressing noise in Shot gather and CMPgather.②The noise of alternating current is suppressed by notching filter in theseismic data which dominating frequency is far from 50Hz.Otherwise,it issuppressed by mono-frequency noise suppression in the time domain of CGGsps;③The module of F-X Coherent Noise Suppression of OMEGA sps isa good mothod to suppress coherent noise.

此方法在炮域和 CMP 道集上应用效果最好；②对于工业干扰，原始资料主频远离 50Hz 时，采用陷波的方法较为简便，否则采用CGG 系统中的时间域单频压制方法；③对于相干噪音压制，OMEGA 中的频率-空间域相干噪音压制方法在知道斜干扰视速度的情况下，应用效果明显。

Actually ,signals are processed from low frequency domain to high one by modulation firstly and alternating current amplification secondly.It can also improve anti-interference抗干扰 ability of circuit and signal to noise ratio of signals.

实际中往往采用更有效的先调制而后交流放大，将信号从低频区推移到高频区，也可以提高电路的抗干扰能力和信实际中往往采用更有效的先调制而后交流放大，将信号从低频区推移到高频区，号的信噪比。

The features and application scope of different alternating and direct current motors used as the drive device of gear pump were compared.

对比了使用不同类型的交、直流电机作为齿轮泵驱动装置的特点和应用范围。

The thermopower of decagonal AlCuCo quasicrystal was measured in the periodic and quasiperiodic direction by laser heating alternating current measurement method in the temperature range of from 300 K to 1200 K.

采用激光交流加热的方法测量了D相AlCuCo准晶周期与准周期两个方向的热电势，温度测量区间为300—1200 K。

He tendered his resignation to the Prime Minister.

他向首相递了辞呈。不适合

International economy and trade,Nanking 210044

国际经济与贸易，南京 210044