导数

By constructing suitable cone and applying the decomposition technique of equation, the positive solutions are investigated for a class of semilinear fourth-order boundary value problems with first derivative.

通过构造适当的锥并且利用方程的分解技巧研究了一类含一阶导数的半线性四阶边值问题的正解。

This method can be applied to calculate rolling-moment derivatives of wing due to yaw and sideslip.

本方法可以用来计算机翼因偏航与侧滑振动而引起的滚转力矩气动导数。

A novel programmable generator of sigmoidal function and its derivation is proposed.

提出了一种新型的可编程S型函数及其导数的发生器电路。

Its outputs include the sigmoidal function to realize I-V nonlinear transfer and its derivative using the forward differential method.

它不仅产生S型函数，完成非线性I -V转换；还利用前向差分法，产生S型函数的导数。

An important property of the ROC of the globally optimized fusion system is obtained, that is, the slope of a curve in the ROC at a particular point can be used to determine the decision thresholds at fusion center and all the sensors required to achieve the detection and false alarm probabilities of that point.

5推导出了全局最优化融合系统工作特性曲线的一个重要性质，即根据融合系统检测概率对虚警概率的导数，可以确定使融合系统工作在该工作点所需的融合中心及各部传感器的判决门限。该性质是对单传感器检测系统ROC曲线性质的重要推广，从而丰富了检测融合理论的研究成果。

The major implementations of the developed model include: Pseudo-spectral and finite-difference schemes are employed to approximate the spatial-differential operators in the horizontal and vertical directions, respectively. A second-order Runge-Kutta method is adopted to integrate in time for the velocity field and the free-surface elevation. The solenoidal condition of the velocity field is satisfied by solving the transformed pressure Poisson equation. A modified secant method is used to accelerate the iterative solution of the non-separable Poisson equation.

模式的主要数值方法包括：分别以拟频谱法以及二阶有限差分法近似控制方程与边界条件中的水平与垂直导数；以二阶Runge-Kutta法进行非稳态的自由液面位移与流场速度的时间积分；利用改良式割线叠代法求解计算区间中不可分离的压力Poisson方程式，以满足不可压缩流条件。

The results as follows,maximum of the derivative was significantly greater(P.01)and value Kof sphygmogram area was less(P.1)in young than elderly group.

结果如下：脉搏波导数最大值是年轻组明显大于年老组(P.01)，波图面积的K值是年轻组小于年老组(P.1)。

Gaussian function through derivative edge detection in real terms is Steerable Wavelet image edge detection.

详细说明：通过高斯函数导数检测图像边缘，实质是方向可调小波变换检测图像边缘。

In each period, without the knowledge of the distribution function of the time between failures and the repair time, the PA estimate of gradient of performance function is put into the stochastic approximation algorithm which recursively optimize the threshold value of the flow control model in a manufacturing system.

在分析过程中，对故障时间和工作时间的分布不做任何假设，利用自适应控制的思想，将整个样本路径依据一定的规则分成有限长的时间段，在每一段时间内用扰动分析估计目标函数的样本导数，然后用随机逼近算法渐进地估计流程控制问题中的最优阈值，从而实现了阈值的自适应控制。

In view of the non-linear relation between the hefts of the partial stress tensor and the velocity gradient of the fluid, the intrinsic equation only depends on the first order differential coefficient of the velocity gradient.

考虑流体的偏应力张量分量与速度梯度为非线性关系的情况，本构方程仅依赖于速度梯度的一阶导数。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。