查询词典 method of difference

A new approach for pattern recognition of ultra-high frequency signals of transformer partial discharge based on multi-scale analysis of wavelet packet and grid dimensionality is proposed, in which the multi-scale transform of wavelet packet is used to extract wavelet coefficients of UHF PD signals and by means of improving difference box-counting method the grid dimensionality of multi-scale wavelet coefficients is calculated and the multi-scale grid dimensionality is taken as the characteristic quantity that is used in the recognition of UHF PD signals.

提出了一种基于小波包多尺度分析和网格维数的变压器局部放电超高频信号模式识别的新方法，采用小波包多尺度变换提取局部放电超高频信号在多尺度上的小波系数，通过改进差盒计数法计算多尺度小波系数的网格维数，并将多尺度网格维数作为特征量用于局部放电超高频信号的识别。

The major findings are:(1) the certified and the uncertified teachersch39r instructional behaviors are very similar, there seems to be no big difference between them;(2) the practices of both teachers are incongruent with the DAP in four aspects: instructional goal, content, and method, as well as teachersch39r role.

结果发现，正式与非正式幼儿教师之教学行为极为相近，可谓大同小异也；二者无论是在教学目标、教学内容、教师角色、或在教学方法上均与以DAP教学指标为主的当今幼教趋势未相吻合，仍有差距。

To combine the relative unchangeability and the existence of the difference of the human nature, added with system method, is the presumption and basic road to rebuild economics.

把人性的相对不变性和人性的差别存在有机地结合起来，辅之以系统论方法，则是经济学重建的前提和基本出路。

The characteristics of air conditioning load in the underfloor air supply rooms were analyzed, and the difference between underfloor air supply air conditioning and the traditional in load calculation method was pointed out.

分析了下送风房间空调负荷的特点，指出了下送风空调系统与传统空调系统在负荷计算方法上的差异，介绍了2种目前用于下送风空调负荷计算的主要方法即数值计算法和修正系数法，并对2种方法的计算特点、适用范围等进行了详细论述。

The paper proposes the free difference operation, which is a new method computing the variation of gray level, based on the classical differential operators.

在传统的微分算子的基础上，论文提出了一种广义的计算图像灰度梯度的方法——自由差分运算。

In order to clearly recognize the geophysical response of carbonate reservoir,based on preliminary recognition of Ordovician carbonate reservoir under the basal surface in Tahe oilfield,some regular vug models and random arranged vug models were designed and built. The variable-grid finite difference method was used to simulate the seismic wave propagation in these models. Then,the seismic records of the models were analyzed and the effect to seismic reflections caused by vug is studied. The impact rule of regular vug scale and random arranged vug density on seismic attributes was obtained.

为了研究碳酸盐岩储层的地球物理响应特征，在对塔河油田奥陶系风化面下碳酸盐岩储层初步认识的基础上，利用随机介质建模技术，设计并建立了一系列碳酸盐岩储层规则孔洞和随机孔洞模型，并应用变网格有限差分法对地震波在孔洞模型中的传播进行了正演计算，对模拟得到的地震属性进行了分析，研究了孔洞对地震反射特征的影响，获得了规则孔洞尺度以及随机排列孔洞密度对地震属性的影响规律。

Use wealth tax measure of the country and legal method at the same time, adjusting control income allocates difference.

同时利用国家的财税手段和法律手段，调控收入分配差距。

The correlation theory is proposed to calculate phase difference and designed in frequency tracking. A promoted method for the initial measurement of CMF's signal processing is based on the Chirp Z Transform application. The result of simulation has proved that the techniques above are feasible.

应用DFT方法处理科氏流量计的信号是DSP算法的基础，本文除了详细介绍其实现过程，还提出了利用相关函数计算相位差和解决频率跟踪算法中的关键技术以及利用线性调频Z变换实现频率初始化测量的新技术。

According to the engineering practice, the theoretical basis and method that survey directly the horizontal distance and height difference by the total station system as fourth grade and below fourth grade control network are put forward instead of surveying slant distance and zenith distance.

摘要根据工程实践，提出了用全站仪直接测量平距、高差来代替测斜距、天顶距作四等及四等以下控制网测量的理论依据和方法，并以张河湾抽水蓄能电站施工控制网为例进行了比较计算。

The difference is discussed in the paper and a novel PMSM DTC system based on the fuzzy distribution of zero voltage vector strategy is proposed at last. Simulation results show that the new method decreases the torque ripple after using zero voltage vectors properly.

论文分析了零电压矢量在永磁同步电机直接转矩控制系统中的作用，并提出了一种基于模糊零电压矢量分配策略的永磁同步电机直接转矩控制方法，仿真结果表明该方法有效地利用零电压矢量达到了减小转矩脉动的目的。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。