查询词典 derivative

We re-examine a problem about action principle which may be easily ignored in the end. After some detailed study, we find that it is correct to do variation of the action with respect to scale factors for Bianchi IX model up to some higher derivative Lagrangian corrections.

我们最后重新检验了在变分法里头容易被忽略的一个问题，最后我们发现，在Lagrangian放入一些高阶修正项的Bianchi II， VIII， IX模型都可以直接对尺度因子变分而得到正确的场方程式。

As the cam profile with constant-velocity-constant-acceleration ramp feature and with continuous higher derivative lift feature is widely adopted in the advanced high-speed internal combustion engines, the cam ramp profile is fitted with a reasonable function and the cam-lift profile is fitted with a polynomial function.

考虑到高速内燃机的凸轮大多采用具有等加速-等速特征的缓冲段和高阶导数连续特征的工作段型式，用等加速-等速函数拟合缓冲段实测升程数据，用整体式高次多项式函数拟合工作段实测升程数据。

The Taylor formula holds the very important status in the differential calculus, especially in solves in some concrete problems to have the extremely important application, for instance the proof inequality, the judgment improper integral collects the divergence, asks the function the limit, asks the function the higher order derivative, determines certain complex progressions to collect the divergence, solves certain differential equation, as well as approximate calculation in and so on application, therefore this article will do the thorough research to these seven aspects.

摘 要：泰勒公式在微分学中占有非常重要地地位，尤其在处理1些具体的茄题中有10分重要的应用，比如证明不等式，判断广义积分的敛散性，求函数的极限，求函数的高阶导数，判定某些复杂级数的敛散性，求解某些微分方程，以及近似计算等中的应用，因此本文将对这七个方面做深入的研究。关键词：泰勒公式；不等式；广义积分；极限；高阶导数；复杂级数；微分方程

A quasilinear equation is one in which the highest -order derivative appears linearly.

最高阶导数线性地出现的那种方程是准线性方程。

The exponent of the derivative of highest order in a differential equation in standard form .

两下里 拼音：解释：①双方；两方面：这办法为国家对农民～都有好处ㄧ第三连、第五连都来了，～一共二百多人。

In this paper, we provide a new method using the DQ method based on the interpolation of the highest derivative for the differential equations. The original function is then obtained by integration.

这种方法的出发点是通过对未知函数最高阶导数进行插值，然后积分得到对低阶导数和原未知函数的逼近。

Kayiga's and Hogarth's artworks demonstrate that art is always derivative of life.

卡艺格和山孩子的艺术彰显了艺术总是有源自生命中的东西。

The 5 type of HA have different values of E465/E665, ranging from 3 to 5. They belong to the category of HA with a large number of molecules. Among them, the Forest Soil HA from Jingyun Mountain has the maximum amount of E465/E665, which means that it has the minimum extent of humification, benzene derivative in HA and molecule complexity.

红外光谱分析表明：供试5种不同土壤腐殖酸红外光谱均出现相似的吸收峰，反映出它们具有相似结构，均含有苯环和酚羟基官能团；但不同腐殖酸的红外光谱也有一定差异，2900cm~(-1)，1720cm~(-1)、1(来源：bcABb1C论文网www.abclunwen.com)520cm~(-1)、1366cm~(-1)。

The orange osmanthus skin-traditional Chinese medicine being taken as raw material, the active ingredient-phenol was extracted with the method of steam distillation and then the derivative of paeonol-aminoethanol and 2,4-dinitrophenyl hydrazone was synthesized. The structural characterization of the derivatives carried out was identified and the test in the anti-bacterial role of three kinds of gram-negative and positive bacteria was done with the method of agar diffusion.

方法］以丹皮为原料，用水蒸气蒸馏法从中药丹皮中提取活性成分丹皮酚，进而合成丹皮酚缩乙醇胺和2，4-二硝基苯腙衍生物，对衍生物进行了结构表征，并采用琼脂扩散法，对3种革兰氏阴性菌、阳性菌进行了抑菌性试验。

It is proved by the analytical and numerical method that the modulus of the Z transform of a finite impulse response sequence has no extreme values at poles (with maximums along imaginary axis and no extreme values along real axis), and the negative second order derivative of the modulus normalized along frequency axis with respect to angular frequency has maximums at the poles.

根据实测瞬态电磁脉冲响应，较好地反演了导体球和导体长椭球的冲激响应，测得了它们的雷达截面和谐振频率。用解析与数值相结合的方法证明了有限冲激响应序列Z变换的模在极点无极值（沿虚轴有极大值，沿实轴无极值），而沿频率轴的归一化值对角频率的负二阶导数在极点有极大值。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。