查询词典 variation method

On the basis of mechanics of materials and finite element method, the theoretical analysis, numeric simulation and imitative calculation were carried out on the stiffness of HSK tool system. Calculation formula of the turning angle-bending moment of HSK cutter shank was presented, basic law of the variation of stiffness of HSK tool system was revealed, thus provided the theoretical basis on reasonable employment of HSK tool system to develop its maximum benefit and at the same time possesses important theoretical significance and practical value for developing the new typed tool system of the independent knowledge property right of our country.

基于材料力学理论及有限元法对HSK工具系统刚度进行了理论分析和数值模拟及仿真计算，给出了HSK刀柄变形转角－弯矩的计算公式，揭示出HSK工具系统刚度变化的基本规律，为合理使用HSK工具系统，使其发挥最大效益提供了理论依据，同时对开发我国自主知识产权的新型工具系统具有重要的理论意义和实用价值。

The mean and individual inspection method for known coefficient of variation were developed, and dimensionless criterion were given out by means of strength, load coefficients and reliability safety coefficient.

介绍结构可靠性检验的概念和各种强度检验方法的特点，对已知变差系数的均值检验和个值检验方法进行改进，利用可靠性安全系数和各种强度与载荷系数，给出无量纲的判别准则。

Based on the characteristic of the vegetation scatter plots in the redband and near infrared band, this paper mainly aims to probe a new method ofextracting vegetation changes by building the coordinate plane of brightindex-perpendicular vegetation index and then getting the variation vectors.

基于植被在红光波段与近红外波段坐标系中的散点图特征，本文着重探讨了一种通过建立多时相&亮度-垂直植被指数&坐标平面，利用变化向量提取矿区植被变化的方法。

The aseismatic reliability of long-span space lattice structures with multiple support excitation based on the pseudo-excitation response spectrum method is analyzed and compared with one under simple support excitation,the variation of the reliability index of each element is investigated simulataneously.

在虚拟激励反应谱法的基础上进行了多点输入下大跨空间网格结构的可靠度分析，并且将之与一致输入下结构抗震可靠度的分析结果进行了对比，考查了两种输入方法下杆件内力可靠指标之间的变化，进而分析了危险杆件在结构分布、数量等方面的差异以及危险杆件随结构跨度、视波速的变化关系。

According to the gap in the field,the effect of mutative skin temperature on objects' millimeter wave radiation temperature is studied. The radiation temperatures of various objects with different skin temperatures are measured by 3 mm DC Dicke radiometer.The result shows the change rules of radiation temperatures of objects with different emissivities are distinct.And the effect is more obvious as the higher emissivity.Based on measured data, temperature variation coefficients of various objects are calculated by the least square method.

针对目标表面温度实时变化引起毫米波辐射变化的规律尚未被研究的现状，使用3 mm直流Dicke式辐射计对不同表面温度条件下的目标辐射温度进行了测量，发现使用不同发射率材料的目标的辐射温度随表面温度变化的规律明显不同，材料发射率越高，目标辐射温度受表面温度的影响越大。

In this paper, we extract the energy feature of the horizontal component of geomagnetism with wavelet packet analysis. Then we have investigated the variation of recognition rate at different time length t=1 h, and identified by use of Fisher's method.

应用小波包分析技术提取了地磁水平分量序列的能量特征，用Fisher方法进行识别，研究了磁暴与非磁暴的识别率在不同时间长度t下的变化规律。

Based on the law of electromagnetic induction, a method to measure the magnetic susceptibility variation of liquid metals was proposed and the instrument was developed. The fundamental of the instrument was also analyzed.

摘 要：提出一种基于电磁感应原理的测量液态金属材料磁化率变化的方法并开发相应装置，分析该装置的基本工作原理。

K-means, and self-organizing map and the feature selection methods based on coefficient of variation and simple T-test were integrated. To evaluate the performance of the Samcluster system, the Samcluster was applied to four expression datasets COLON, LEUKEMIA72. LEUKEMIA38, and OVARIAN. The results show that there are only 5, 1,0, and 0 samples misclassified, respectively. We conclude that the proposed scheme. SamCluster. is an efficient method for automatic discovery of sample classes using gene expression profile.

在Samcluster系统中，整合了下列聚类算法：谱系聚类、K-平均值聚类和自组图聚类与变异系数计算和T-检验等基因变量选择方法，并提出了一致的样本分型概念，通过对四个基因表达谱的数据集COLON、LEUKEMIA72、LEUKEMIA38和OVARIAN的测试，结果表明：误判的样本数分别为5、1、0和0个，因此，基因水平的样本分型与样本的临床分型高度一致。

The authors analyze the operation characteristic of distance protection of transmission line connecting wind farm with power grid under the variation of parameters such as the amplitude ratio of electromotive force at both sides, the phase difference of electromotive force at both sides, equivalent impedance of sources, system frequency and so on; based on the real-time current and electromotive force at wind farm side as well as the information of wind power generators participating power generation, a method to adaptively set the operation boundary of distance protection by use of the information at wind farm side only is proposed.

文章分析了风电场和电网联络线的距离保护随电源电势幅值比、电势相位差、电源等效阻抗、系统频率等参数变化时的动作特性，并基于风电场侧的实时电流和电势与参与发电的发电机信息，提出了仅利用风电场侧信息量自适应整定保护动作边界的方法。

Secondly, two physical models were constructed, which could model rough surface and describe the features of the earth surface, such as chine, neck, valley and hill, etc. According to difference method, the ""true"" volume of the physical models were measured, which was 13260cm3 and regarded as the analysis foundation of the precision of the volume that was calculate by DEM. The discrete dada of the models on a regular spacing of 1cm were collected by 3SPACE FASTRAK and the DEM was obtained by interpolating the discrete dada through GIS software. Based on the volume of the models calculated by DEM, different interpolating methods (IDW, Spline, Natural Neighbor, and Kriging) and variation of grid spacing of data were compared and their effects on precision of volume calculation were analyzed.

构建了可模仿凸凹不平地形表面的实体模型，该模型能够表征山脊、山尖、山涧、丘陵等地形特征；根据体积差减法测量实体模型的体积作为数据精度分析的体积&真值&，该值为13260cm~3，作为采用DEM进行体积计算的基准值；利用精度为0.08cm的三维数字化仪采集间距为1cm的离散数据点，对离散数据点用GIS软件进行内插处理生成DEM模型，通过DEM计算出模型的体积，探讨不同内插方法(IDW、Spline、Natural Neighbor和Kriging)和数据格网间距变化对体积计算精度的影响。

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起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。