查询词典 tangent function

The results of numerical experiments, using the four-dimensional variational data assimilation system of the nonhydrostatic mesoscale model MM5, show that: the tangent linear model and adjoint model conducted by keeping the "on-off" switches the same as the basic state, can provide a good approximation of the first-order information to the NLM perturbation and a good descent direction for the minimization procedure; switching on and off at every other time step in the Kuo cumulus parameterization scheme don"t impact the convergence rate of cost function; the existence of the switches don"t impact improvement to the MM5 model rainfall prediction because that not only specific humidity ,but also wind, temperature and pressure are assimilated into the model.

非静力中尺度数值模式MM5的四维变分资料同化系统进行的数值试验结果表明："开关"变量保持与基态一致，所构造的切向线性模式能够提供关于非线性模式扰动的一阶近似，伴随模式所计算的梯度值能够为最小化过程提供较好的下降方向；郭氏降水参数化方案中对流每隔一个积分步的交替发生并不影响目标函数最小化的收敛速度；"开关"变量的存在也不影响将风、温度、气压和比湿结合起来同化对MM5降水预报准确性的提高。

In chapter 4, some vector mathematical definitions are first given to position tolerance zones; second, the principle of variation geometry is introduced, and the mathematical foundation of automatic generation of a approximate linear equation of tolerance design function by variation geometry is first proven; tangent method and two-point slope method based variation geometry are main studied.

第四章首先对一些位置公差带给出了矢量化的数学定义；然后介绍了变动几何的原理，首次论证了变动几何能产生近似线性公差设计函数的数学依据，并着重研究了基于变动几何的切线法和二点斜率法。

The slope of a line tangent to the curve at the point is the marginal function.

需求曲线在这一点上切线的斜率也就是该点的边际函数。

If α had been determined,the dissociation and non-dissociation species photolysis rate constants could be calculated by the tangent equation of the power function.

任意解离度条件下的解离态和非解离态光解速率常数，可根据幂函数的切线方程来确定。

L The tangent problem. Given a function y = f and a point P on the graph of f , this problem asks for the equation of the line that locally shares with the graph just the point P .

切线问题：给定一个函数f和函数图形y=f上的一点P，这个问题是要求一条和y=f"局部分享恰于点P"的直线的方程式。

A revised branch and bound algorithm based on the idea of Horst (1976) is developed to minimize the tangent plane distance function to determine the thermodynamic stability of a postulated solution for the liquid phase equilibrium described by UNIQUAC or UNIFAC activity coefficient equations.

分支限界法是近年来发展起来的一种用于求解全局优化问题的确定性算法。在本文中，针对由UNIQUAC或UNIFAC活度系数方程描述的液相稳定性分析问题，我们发展了一种用于最小化切平面距离函数的改进的分支限界法。

The tangent plane distance method is the most popular method for phase analysis, which needs to find the global minimum value of TPD function.

相稳定性判别为相平衡计算的基本课题，常采用Gibbs自由能曲面与切平面的距离函数最小化方法求解。

The algorithm of the static voltage stability region s tangent plane through the characteristic vector method or the implicit function derivative method is presented in the total parameter space,which can provide quantitatively the influence degree of all kinds of parameters on the voltage stability region.

提出了基于全参数空间的静态电压稳定域的2种切平面计算方法：特征向量法和隐函数求导法。

In this dissertation we put forward the means of computing tangent space coordinates usingpseudo-inversion based on the matrix trace function derivative rules.

本文中提出了基于矩阵迹函数求导法则的"伪逆法"求解切线距离中切线空间坐标的方法。

The type of the limit state function is set up according to the Mohr-Coulomb yield criterion which can consider the direction of the slip surface; and the derivatives of the stress to the basic stochastic variables of the slope are computed by using partial differential method based on the incremental tangent stiffness method and the accelerating convergence method of Aitken.

其中功能函数的形式是以考虑滑面方向的Mohr-Coulomb屈服准则来建立的；导数的求解采用的是基于增量切线刚度法及Aitken加速算法的偏微分法；边坡整体可靠指标取的是所有可能滑面的可靠指标的最小值。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了