查询词典 decomposition

Due to its good effect in the reservation of information of signal abrupt change, mathematical morphology is often applied in the detection and location of short-term power quality disturbance, however, there is still a defect of invalid detection existing in partial detection methods based on mathematical morphology while some zero-crossing disturbances are detected. In this paper three mathematical morphology based disturbance detection and location methods, i.e., the method based on first-order derivation and morphological gradient, the method based on morphological gradient and soft threshold processing and the method based on dq decomposition and top-hat transform, are analyzed, that is, by means of simulation the adaptability of these methods in the analysis on the signals of voltage sag, voltage swell and electromagnetic transient oscillation is compared.

数学形态学因其在保留信号突变点信息方面有很好的效果，因此常用于短时电能质量扰动的检测和定位，但基于数学形态学的部分方法仍存在对某些过零点扰动检测失效的缺点，文章分析了3种基于数学形态学的扰动检测和定位方法，即基于1阶求导和形态梯度的方法、基于形态梯度和软阈值处理的方法、基于dq分解和高帽变换的方法，通过仿真比较了3种方法在分析电压暂降、电压暂升、电磁暂态振荡等信号方面的适应性，结果发现基于dq分解和高帽变换的方法在检测过零点扰动时具有很好的效果，因此选取这种方法对实测扰动数据进行了检测和定位分析。

This paper divides the building using domain decomposition method,simulates the temperature field of surface element,and presents the variety of temperature field.

本文采用区域分解法对建筑物进行了划分，对所划分的面元进行了温度场模拟，给出了表面温度场的变化，对结果进行了定性分析，通过分析检验了结果的合理性。

The paper emphatically summarizes the classification, thinking mode, present status, problems and devolopment of methods for solving nonlinear system of equations, and specially recommends some practical and new methods, such as the elimination by eliminant with aid of basic sets, homotopy method and decomposition method, etc.

综述了机构学中常见非线性问题的数学模型及其解法，着重述评非线性代数方程组解法的分类、求解思路、研究现状、存在问题和发展方向，特别推荐基组结式消元法、同伦法和分解法等实用新型的解

Using Gauss elimination method and alignment triangular decomposition method for solving linear equations of the program source code.

用Gauss消去法和Doolittle三角分解法求解解线性方程组的程序源代码。

Ordosica community. Those changes accelerated decomposition of A. ordosica litter and soil transpiration, promoted the release of calcium ion and carbon dioxide, thus enhanced the eluviation and precipitation of calcium carbonate in soil of A. ordosica community.

这些变化促进了油蒿枯枝落叶的分解，加速了Ca(上标 2+)的释放，促进了土壤呼吸，促进了土壤中CO2的释放，进而促进了油蒿群落土壤中CaCO3的淋溶和淀积。

They also utilize propolis to embalm too heavy invaders to move themselves so as to impede their decomposition.

保存方法：平常需要注意的是使用后要盖紧瓶盖，且放在阴凉处以免受到阳光直接的照射。

In this paper, the wavelet decomposition and re-composition are applied to the watermark embedding and detection.

数字水印的嵌入和检测是通过小波分解和重构实现的。

Signal analysis;parabola parameter spline curve;Empirical Mode Decomposition;Intrinsic Mode Function;Hilbert transform

信号分析；抛物参数样条曲线；经验模态分解；固有模态函数；希尔伯特变换

The three molecular decomposition reactions studied here are all concerted, and the radical reactions all endothermal and barrierless.

本文所研究的分子解离反应全部为协同过程，而自由基解离过程都是无势垒的吸热过程。

Through measuring oxygen index and smoke density, the flame retarding and smoke suppressing properties were studied from different aspects, such as structure and composition of LDH, nanoscale effect, endothermal process and releasing of CO2 and H2O in the process of decomposition.

结合氧指数、烟密度等阻燃测试手段，从结构、组成和纳米尺寸效应等方面综合分析了LDH的阻燃抑烟性能。

Through comparing with the results by simulation to study the effects of theprojectile"s final velocity, the angle of rotation and the ballistic trajectory"s migration withdifferent projectile"s rotating speeds, different target"s moving speeds and differentpenetration angles.

通过比较数值模拟的结果来研究不同弹头转速、目标速度、侵彻角对侵彻过程中弹头最终速度、翻转角度和弹道偏移的影响。

I love stationery and all the accoutrement of writing.

我爱文具以及所有的书写的工具装备。