查询词典 derivative

Numerical calculation of Green's function and its partial derivative plays an important role in the water dynamics.

未经语际同意，其它公司或个人对此文的转载行为，语际将保留起诉权力。

In general a partial derivative of f with respect to a variable q is the ratio of df to dq when certain other variables are held fixed.

一般来说函数f对某一特定变数q的偏微分所代表的是在其余变数固定的情形之下，df对dq的比值。

When we use boundary element method to solve problems of fluid structure interaction, large amount of calculation of Green's function and its partial derivative is required.

Green函数及其偏导数的数值计算在水动力学中起着重要作用，当用边界元法求解流体结构相互作用问题时，需要大量的计算Green函数及其偏导数。

This article which points out the importance of the partial derivative of the unit vector through the common mistakes in the vector analysis and carries on the analysis of the practical examples enables the general scholars to have a comprehensive understanding to this question.

通过矢量分析中常见的错误，指出了单位矢量的偏导数在矢量分析中的重要性，并举出实例进行分析，旨在使广大学者对这一问题有一个深刻的认识。

Vector derivative ; matrix ; the plane complex movement of a particle

矢量导数；矩阵；动点的平面复合运动

The derivative function of the ESD as a function of α, determine the frequency of its peak value.

把各阶导函数的ESD作为α的函数，确定其峰值频率的数值。

Barles onlyproved the existence of oblique derivative problems by Perron methods i.e.assumethat there is an uppersolution and a lowersolution,then there is a viscosity solution.

Barles也讨论斜微商问题的粘性解的存在性，但他得到的结果也只有在假设上、下解存在情况下有粘性解，这结果不如我们的结果来得直接。

The IR absorption spectra of PPD was observed at 830~840cm-1, which was assigned to the skeletal vibrations of the phenazine ring. The UV-vis absorption spectra of PPD was at 430nm in dimethyl sulfoxide. Through the analysis of thermogravimetry and derivative thermogravimetry of PPD, the PPD powders char yield at 850 C, which exhibited perfectly stability.

之间有吩嗪环特征吸收峰，说明聚邻苯二胺含有吩嗪环结构；用紫外—可见光谱研究聚合物的吸收峰，发现聚合物在430nm附近有很强的吸收峰；由热重分析发现聚合物在850℃时炭化，所以聚合物有较高的热稳定性。

The preparation of a novel porphyrin derivative bearing oligo( p -phenylene) group and its zinc complex was reported, which involved a microwave irradiation and a synthesis based on the template effects, respectively.

利用微波反应和模板效应合成了带有苯乙烯撑单元的新型卟啉化合物和锌卟啉配合物。

Winckelmann, the spokesman for philhellenism, extolled Greek art and dismissed all Roman art as derivative and Virgil as second rate and incapable of understanding true beauty.

亲希腊的代表温克曼鼓吹希腊艺术，他贬低所有的罗马艺术都是希腊的模仿产物，维吉尔也属二流之列，并无法理解真正的美为何物。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。