查询词典 certified

The study has focused on: 1 The research background and the current state of the power measurement were analyzed systematically, and then wavelet-based power measurement algorithm was certified feasible for astable signals; 2 We developed a new method of RMS and power measurement based on Dmeyer wavelet. After that three other wavelet measurement approaches were compared with Dmeyer wavelet-based measurement approach. Then the impact on measurement errors of amplitude frequency property and energy leakage of wavelet filter banks were deeply researched, and some measures were proposed to reduce it; 3 We developed a new strategy of power measurement algorithm based on lifting wavelet, which had calculation advantage compared with the first wavelet, so that it was more suitable for the realization of hardware; 4 The running system of wavelet-based power measurement algorithm based on DSP was proposed, and then it was realized on ICETEK-VC5416-A EVM board; 5 Existing problems and the further research direction of wavelet-based power sub-band measurement algorithm was discussed.

本文对基于小波变换的功率测量算法展开深入的分析研究，主要内容有：1）系统地分析了功率分解测量的研究背景、国内外的研究现状，并从能量守恒的角度验证了小波功率分频带测量算法在非平稳信号条件下的可行性；2）首次提出了Dmeyer小波变换有效值与功率的测量方法，进而通过对该方法与3种已经提出的小波测量方法的对比分析，深入研究了小波滤波器组的幅频特性和能量泄漏特性对测量误差的影响，并针对电网谐波的特点提出了减小影响的相关措施；3）首次提出了二代小波功率测量算法，对比一代小波功率分频带测量算法，它大大减少了算法实现的运算量及内存的需求量，从而更适合于硬件的实时实现；4）提出了小波功率分频带测量算法的DSP实现方案，并在ICETEK-VC5416-A EVM板上进行了实现；5）探讨了小波功率分频带测量算法目前仍存在的问题，并提出了进一步的研究方向。

In determination of atomic weight and isotope certified reference materials preparation, isotopic abundance almost is determined by this method.

在原子量的精确测量和同位素标准物质的研制工作中，一般采用此方法对元素同位素丰度进行定值，测量仪器多采用表面热电离质谱计。

Covering 6.8 square kilometers,the club is the first and only one recognized AUDUBON INTERNATIONAL certified member in Asia.

俱乐部占地6.8平方公里，是目前亚洲唯一一家AUDUBON生态认证俱乐部。

The 957 and 957RPDA backflow preventer should be tested by a certified tester at the time of installation.

在安装期间，957和957RPDA防回流阀应该由有资格证书的检验员进行检验。

My dear friend I will like you to contact the finance house for the collection of this international certified bank draft.

我亲爱的朋友，我会想你接触财务府为收集这项国际认证的银行汇票。

It is optional to provide certified true copies of documents, and statement of bank reconciliation.

可选择是否提供上述各项开支的证明文件及银行对帐表的认证副本。

Please provide certified true copies of documents, and statement of bank reconciliation in support of the above income.

请提供上述各项收入的证明文件、银行结单及银行对帐表的认证副本。

C Is certified by the company's doctor, to be unfit for employment.

被医生证明不适合在公司工作。

Is certified by the Company's doctor to be unfit for employment.

o 被医生证明健康状况不理想或不适宜工作。

We are the pioneer in certified organic beekeeping in North America, having been granted USDA organic certification in 1995 after intense research and development for many years.

我们是北美经过认证的有机养蜂的先驱，经过多年的认真的研究和开发，在1995年就被美国农业部授予有机证明，从那以后，我们的有机承诺进入有机食品工业，并保持美国农业部的有机认证鉴定。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。