视在频率

The designed terminal can collect too many electric parameters such as voltage RMS, current RMS, digital waveform of voltage and current, active power, reactive power, apparent power, frequency and current temperature etc.

该终端可以采集三相电压、电流的有效值，三相电压、电流的数字波形，三相有功、无功、视在功率，频率，现场温度等各种电力参数，还可以同时采集3路脉冲量，8路模拟量。

The designed terminal can collect too many electric parameters such as voltage RMS, current RMS, digitalwaveform of voltage and current, active power, reactive power, apparent power, frequency and current temperature etc.

该终端可以采集三相电压、电流的有效值，三相电压、电流的数字波形，三相有功、无功、视在功率，频率，现场温度等各种电力参数，还可以同时采集3路脉冲量，8路模拟量。

For a four PRFs' radar system, the resolved results calculated by the residues' difference look up table method from any two of the target distances detected are equal.

对于一个四重脉冲重复频率的雷达系统，利用真实目标在任何两个脉冲重复频率上检测得到的视在距离，经过余差查表法匹配解得的目标距离是相同的这一特性，可以对多目标进行解距离模糊。

Seizure frequency decreased by at least 50% in 47% of patients, by at least 75% in 24% of patients, and by 100% in 7% of patients. Of those receiving oxcarbazepine monotherapy, 59% had at least a 50% reduction in seizure frequency, 36% had at least a 75% reduction in seizure frequency, and 10% were seizure-free. Adverse events reported most frequently were dizziness in 46%, headache in 32%, fatigue in 30%, diplopia in 30%, nausea in 26%, abnormal vision in 21%, and somnolence in 21%.

结果在全部完成试验的患者中，47%的患者其发作频率下降至少50%，24%的患者发作频率下降至少75%，7%的患者2年间不再发作；而仅服用oxcarbazepine的患者中，59%的患者其发作频率下降至少50%，36%的患者其发作频率下降至少75%，10%的患者其发作频率100%下降；在副作用的部分，常见的有晕眩46%、头痛32%、疲倦30%、复视30、恶心26%、异常的视觉21%，以及嗜睡21%。

Synchronized phasor measurements is a new developing technology in power system dynamic stability monitoring. It can effectively characterize the dynamic behavior of power system, directly perceived features, it reduces memory requirement and facilitate the postprocessing with the ability of improving efficiency, it provides an effective on-line analytic method for people working on power system.

本文对电力系统同步相量动态测量系统的建立和应用做出了积极贡献，在系统评述前人研究成果的基础上，给出了视在相角和视在频率的定义，提出了在线快速相量测量算法，并将几种自适应测频算法进行了比较，建立了基于GPS的电力系统全网同步时钟，完成了相应的动态监测装置及其动模实验。

Based on the basic principle of reflection and transmission in the process of the propagation of logitudinal wave, this paper recounts a new theory and method for the application of pile body completeness inspection data with reflection wave method to the quantitative determination of apparent reflection coefficients and the round travelling time of reflection wave.

摘要从纵波传播过程的反射和透射的基本原理出发，介绍了反射法桩身完整性检测数据在频率域中定量确定视反射系数和反射波往返时间的一种新的理论和方法。

Postoperative contrast sensitivity testing showed statistically significant differences (P＜0.05)between the two IOLs at 12 and 18 cpd under photopic, at 1.5and 3 cpd under mesopic, and at 1.5 and 3 cpd under mesopic with glare conditions.· CONCLUSION: The Tecnis Z9000 IOL proved to have statistically significant superior contrast sensitivity to the 911AIOL at high spatial frequencies under photopic conditions and at low spatial frequencies under mesopic and mesopic with glare conditions.

术后对比敏感度分析发现两组在12和18 cpd、1.5和3 cpd以及1.5和3 cpd均有统计学差异(P＜0.05)结论：Tecnis Z9000 I0L被证明其对比敏感度在明视高空间频率和暮视低空间频率方面均显著优于911A IOL。

The issues of present seismic wavelet frequency caused by different concepts, such as apparent frequency, dominant frequency, peak frequency and centroid frequency, etc., which are defined by different methods, and understanding deviation, definition of seismic wavelet frequency for time and frequency domain are concluded and summarized. On this basis, three kinds of seismic wavelets in common use such as Ricker and Zinc wavelets as well as sine wavelet with exponential attenuation characteristics are analyzed and a conclude is achieved that apparent frequency and dominant frequency are consistent in essence, but peak frequency and centroid frequency as well as apparent frequency or dominant frequency are not completely consistent with different seismic wavelets. For actual seismic data, peak frequency can approximately be used as dominant frequency, but it is not suitable when seismic wavelet is known for it can give out any wrong knowledge and results.

针对目前地震子波频率由于定义方式出现的各种概念（视频率、主频、峰值频率、中心频率等）以及理解上出现的偏差等问题，首先从时间域定义和频率域定义2个方面进行了归纳和总结，并在此基础上对3种常用地震子波（Ricker子波，Zinc子波，正弦指数衰减子波）进行了分析和研究，得出视频率与主频概念一致，但不同地震子波的峰值频率、中心频率和视频率之间并不完全一致的结论；而对于实际地震资料，将峰值频率近似看作地震子波的主频是可以的，但在地震子波已知的情形下这样做是不恰当的，甚至可能会得出错误的结论和认识。

Based on the hypothesis of Cole-Cole model, a new recursive inversion method is used in the inversion of complex-resistivity sounding curves over multi-layered earth with Schlumberger array without electromagnetic couping.

在Cole Cole模型假设的基础上，用一种新的递推反演算法对无电磁偶合影响时的水平层状大地对称四极装置复电阻率测深曲线进行反演，得出了层状大地上视电阻率、视时间常数、视频率相关系数、视充电率的视真频参数测深曲线。

This series of instruments for low-voltage, medium voltage, high-voltage switchgear and distribution systems, central station monitoring system, generator set systems, building automation systems, energy management system, such as factories, able to measure three-phase three-wire, three-phase four-wire system current, voltage, active power, reactive power, apparent power, active power, reactive power, power factor, frequency, voltage triangular openings, the largest open-shaped voltage power parameters, at the same time with a remote, remote control function.

该系列 仪表适用于低压、中压、高压开关和配电系统、中心电站监测系统、发电机组系统、楼宇自控系统、工厂能量管理系统等，能够测三相三线，三相四线系统的电流、电压、有功功率、无功功率、视在功率、有功电能、无功电能、功率因数、频率、开口三角形电压、最大开口形电压等电力参数，同时带有遥信、遥控功能。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。