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    Study on Structural Theory and Algorithm of Power Sales Decision Support Systems Based on Data Mining
    基于数据挖掘的电力营销决策支持系统的结构原理及算法研究
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    Research on Power Short-Term Load Forecasting Model and Method Based on Data Mining
    基于数据挖掘的电力短期负荷预测模型及方法的研究
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    Data Mining of Electrical Power System Dynamic Response
    电力系统动态响应的数据挖掘
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    Multisensor Data Fusion and Its Application in Induction Motor Fault Diagnosis
    多传感器数据融合及其在电机故障诊断中的应用研究
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    Study on Data Mining Method and Its Applications in Power System Fault Diagnosis
    数据挖掘方法及其在电力系统故障诊断中的应用研究
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    Adopting OEM Modules in μP-Based Telequipment:Real-Time Application of 16-Bit Micro-System
    OEM模块16位微型计算机系统的实时应用——西北电网实时数据收集与转发简介
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    DEVELOPING A SCADA SYSTEM BASED ON IBM-PC
    基于IBM-PC的数据采集和监控系统
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    Optimal Design of Digital Communication Networks in Power System Using the Greedy Algorithm
    贪心算法在电力系统数据通信网优化设计中的应用
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    The Design of Communication System in Automatic Train Overspeed Protection System
    列车超速防护系统中数据通讯系统的设计
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    Storage Methods of Recording Power Consumption in Power Supply Controller
    用电控制器中用电量数据存储方法
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We show that on each Schubert cell, the corresponding Kostant harmonic form can be described using only data coming from the Bruhat Poisson structure.
      
We study and compare their approximation properties and applicability in data compression.
      
We show that global well-posedness occurs even when the initial data is rough.
      
The main goal is to develop the corresponding theory for Lp-integrable bounday data for optimal values of p's.
      
A class of fast orthogonal transformations for finite strings of data are described.
      
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For the purpose of supplying useful information to manufacturing organizations, and of systematically examining the effects of temperature and time of annealing on the domestically produced low silicon steel electrical sheets, a series of experiments has been performed. The results show that the lowest obtainable values of core loss of samples box-annealed in its own atmosphere are approximately P_(10)=2.3 watt kg, P_(15) = 5.2 watt/kg, 30% lower than the permissible values set in ROCT 802-41 for э1A.

为了提供生产上有用的数据,为了考察国产低矽钢片在不同温度不同时间的条件下退火以后的效果,我们进行了具有相当系统性的关于退火条件的实验。实验结果表明:在较850℃为低的温度退火不同时间或多次退火,可使铁心损失达到同一最低值;在高于950℃的温度退火以后,即令再度在较低温度退火,也不能达此最低值。此最低值约为:P_(10)=2.3瓦特/千克,P_(15)=5.2瓦特/千克,较ГOCT802-41中对Э1A规定的最高值低30%。

An experimental verification of the theoretical peak current equation forreversible electrode reactions of the Randles-Sevcik oscillopolarography, i_p=Kn~(3/2)D~(1/2)m~(2/3)θ~(2/3)α~(1/2)cμΑ, is carried out with both single- and multisweep methods. Themultisweep method is essentially that of Delahay, while a simplified circuit isdevised for the single-sweep procedure. The constant K in the above equation has been worked out by Randlesand Sevcikc, but their values differ by some twenty-one percent. Experimentalresults...

An experimental verification of the theoretical peak current equation forreversible electrode reactions of the Randles-Sevcik oscillopolarography, i_p=Kn~(3/2)D~(1/2)m~(2/3)θ~(2/3)α~(1/2)cμΑ, is carried out with both single- and multisweep methods. Themultisweep method is essentially that of Delahay, while a simplified circuit isdevised for the single-sweep procedure. The constant K in the above equation has been worked out by Randlesand Sevcikc, but their values differ by some twenty-one percent. Experimentalresults as to which K value is correct have been contradictory. The authorspoint out that Sevcik's value of K is too low, due to the error in choosing too largea unit in his numerical integration. By taking smaller units and reperformingthe integration, the K value increases and approaches that of Randles. Thus thecorrectness of Randles' K value is ascertained and this value is used in calculatingthe theoretical slope. Their single-sweep results, with concentrations from 2×10~(-4) to 1×10~(-3) m/l andα~(1/2) from 1 to 4 volts/sec, agreement between experimental and theoretical slopesis obtained in the case of Tl~+ in m NaCl. In the case of Cd~(++) in m NaCl, experi-mental results deviate from the theoretical value, and the deviation increases withincreasing c and α~(1/2). Contrary to an unproven idea of Delahay, i_p obtained bymultisweep method is higher than that by the single-sweep procedure. However,in calculation of the theoretical values, a value of 15.0×16~(-6) obtained by polarLographic method is used for D of Tl~(+) in m NaCl. The use of the value of Dat infinite dilution is thought to be unjustified. If a D value of 15.0×10~(-6) is used,Delahay's results of Tl~+ in KNO_3 would be higher than the theoretical equationinstead of agreeing with it. This fact seems to support the findings of this paper. Various methods of correcting for capacity currents are compared and discus-sed. The authors point out that at α~(1/2) less than 2 volts/sec, the method of drawingan hbrizontal line introduces no appreciable error while at, high α, various methodsyield different results. This fact lowers the accurraey of data obtained at high α. The iR drop in the electrolytic cell and on the series resistance causes themeasured α to be different from the a actually applied on the drop electrode. Anelementary approximate correction of this effect is mentioned. Results after thiscorrection show that the deviation of Cd~(++) from theoretical at high c and α maybe due partly to this effect.

(1)以单波法及多波法验证Randles-Sevcik示波极谱理论公式之i_p~c及i_p~α~(1/2)关系,多波法用Delahay线路,单波法则用简化线路。单波法之结果,对亚铊离子在m氯化钠中,在2×10~(-4)~1×10~(-5)m浓度,α~(1/2)为1及4伏特/秒,实测结果和理论符合。镉离子在m氯化钠中,实测结果与理论有偏差,偏差随浓度及α~(1/2)加大而加大。多波法之i_p实测值高于单波法。 (2)在计算理论曲线时,作者肯定Sevcik之系数过低而采用Randles数值。亚铊离子于m氯化钠中之扩散系数D,采用极谱法测得之数值15.0×10~(-6)而不用无限稀时之D值(20.0×10~(-6))。 (3)在α~(1/2)低于2伏特/秒时,可用画水平线法扣除电容电流。在高α时各种扣除电容电流方法所得结果不同,影响结果之可靠性。 (4)电解池线路上之iR降使加在滴汞电极上之α改变。这种改变使实测i_p值偏低。作者曾作初步近似修正,结果说明α及浓度大时,镉离子实测数据对理论的偏差的一部分可能是由于iR降的作用。

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对工业企业低压电网的特性及其与开断电器的相互关系尚很少研究,而这一问题对开断电器的工作和设计有重要的意义。本文第一部分介绍作者所应用的低压电网固有频率的测量方法,并提出在某工厂典型电网进行大量实地测量所得的数据。第二部分为研究低压电网特性与开断电器的相互关系。根据实验分析,电器开断时电弧燃炽时间随电网固有频率升高而增加,而各种灭弧室对恢复电压的幅值及固有频率超不同程度的表减作用。最后根据电弧燃炽时间及介质恢复强度对五种灭弧室进行比较研究,认为迷宫式灭弧室具有较强的灭弧能力。

 
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