The first-order derivative equal to zero of total potential energy with respect to the relative shear deformation of shear band leads to the equilibrium condition of elastic rock.
将系统的总势能对相对剪切变形求一阶导数（等于零），得到了弹性岩石的平衡条件。
The content of etoposide injection was determined by first order derivative spectrophotometry.
用一阶导数光谱法测定足叶乙甙注射液的含量。
METHODS: to test the contents of cefotaxime sodium and cimetidine in all kinds of infusions using first order derivative and double wavelength spectrophotometry.
方法：采用一阶导数分光光度法和双波长光谱法测定各配伍液中头孢噻肟钠和西咪替丁的含量。
The determination of norfloxacin in compound norfloxacin ear drops by first order derivative UV spectrophotometry needed no separation and was simple, rapid, and accurate.
采用一阶导数分光光度法测定复方滴耳液中诺氟沙星的含量，样品不须分离，方法简便，结果满意。
METHODS: The first order derivative spectrophotometry was used.
方法：采用一阶导数分光光度法。
The Content of phenytoin sodium (for injection) was determined directly by the first order derivative spectrophotometry.
本文采用一阶导数紫外分光光度法直接测定注射用苯妥英钠的含量。
The determination of potassium guaiacolsulfonate in Shangfeng Zhike granules by first order derivative UV-spectrophotometry needed no separation and was simple, rapid, and accurate.
采用一阶导数分光光度法测定伤风止咳冲剂中愈创木酚磺酸钾的含量，不须分离，方法简便，结果满意。
A double wavelength-differential-first order derivative spectrophotometric assay was established to determine carbon monoxide (CO) generation during in vitro metabolism of xenobiotics.
用双波长、差示、一阶导数分光光度法，建立了一种测定外源物体外代谢时一氧化碳(CO)生成量的新方法。
Firstly, using the first order derivative of Gaussian function as the base wavelet, the direction Angle function of a planar curve was analyzed on multiple scales to obtain the candidates of corners.
使用高斯函数的一阶导数作为基本小波，对曲线的方向角函数进行多尺度小波分析得到候选点集，提出了四个筛选规则对候选点集进行逐步筛选得到正确角点集。
Method: The content of fluconazole in gel was measured by first order derivative spectrophotometry.
方法：采用一阶导数分光光度法进行含量测定。
Reliability analysis using First Order Second Moment (FOSM) is important for structural probability design, in which process demands the derivative operation.
一次二阶矩法是目前求解结构可靠性分析的主要计算方法之一，该方法要求功能函数对随机变量的偏导运算。
This paper discusses the stability of solution of the oblique derivative problem for the nonlinear elliptic system of first order equations.
讨论了一阶非线性椭圆型方程组斜微商问题解的稳定性，这个结果是借助于有关边值问题解的先验估计而导出的。
Some first order time derivative terms are contained in the equations.
方程中含有强迫场的一阶时间导数项。
In unsolved derivative first-order differential equations, this paper is based on Lagrange equation and Clairaut equation, and popularizes them.
另一种是在未解出导数的一阶方程中，在拉格朗日方程、克策洛方程解法的基础上更加广泛的推广。
In unsolved derivative first-order differential equations, this paper is based on Lagrange equation and Clairaut equation, and popularizes them.
另一种是在未解出导数的一阶方程中，在拉格朗日方程、克策洛方程解法的基础上更加广泛的推广。
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