查询词典 derivative

Thirdly, in order to improve the learning efficiency and stability of feedforward neural network, a fast learning algorithm for neural networks based on CGM-OC approach is presented. Compared with other learning methods such as BP method, Broyden Flecher Goldfarl Shanno method and Powell method in which the derivative is replaced by the difference quotient etc, simulation results show that the proposed method is an efficient and fast one.

第三，为了提高前馈神经网络权值的学习效率及稳定性，提出一种基于正交校正共轭梯度优化方法的神经网络学习算法，通过与其它学习算法（如：BP算法、变尺度法、用差商近似代替导数的Powell法等）的比较，经仿真试验表明，本算法是一种高效、快速的学习算法。

In this paper, the idea of that derivative is replaced with difference quotient is involved in calculating each item of Jacobi matrix.

船舶自由浮态计算实质也是求解一个隐式非线性方程组，故同样可用这一方法求解。

The weight values in NLSM were adjusted automatically according to target data, which allowed the measured data with different dimensions or ranges to be treated at the same level, and thus the accuracy and stability of algorithm were improved accordingly. Derivative was replaced by the difference quotient in NLSM which further improved the algorithm speed.

非线性最小二乘法的权值根据目标数据自动调整，使得不同量纲和不同数值范围的观测数据可以在同一水平上进行，提高了计算的精度和稳定性；另一方面用差商近似代替导数加快了算法的收敛速度。

Theorem 1 Suppose the function is differentiable at,then its partial derivative at exist, and the total differential of

定理1如果函数在点可微分，则该函数在点的偏导数必定存在，且函数在点的全微分为。

Two mathematical derivations of them have been introduced by using the properties of differentiable function and the derivation algorithm of multiple function in present paper, and several mistakes in some derivative methods have also been pointed out.

介绍了应用可微函数的性质及多元复合函数的求导性质推导热力学中著名的麦克斯韦关系式的方法，指出了有关文献中推导过程的不

The interactions for 3, 3-bisoxetane/tetrahydrofuran copolymer with hexanitrohexaazaisowurtzitane (CL-20), 3, 4-dinitrofurazanfuroxan, 1, 3, 3-trinitroazetidine and ammonium nitrate were studied by using pressure differential thermal analyzer and thermogravimetry-derivative thermogravimetry.

用高压差示扫描量热法和热重－微商热重法，研究了PBT与CL-20、DNTF、TNAZ、ADN之间的相互作用。

By definition, we can see that the marginal analysis of differential calculus is essentially a derivative of the application.

由定义可知，边际分析法实质上是微分学中一阶导数的应用。

A differential circuit has been designed and applied to measure the second derivative of \%I-V\% characteristic on lin.

在相同的放电条件下，使用自行设计的微分电路，对探针特性二次微商进行在线测量。

A differential circuit has been designed and applied to measure the second derivative of \%I-V\% characteristic on lin...

这两种方法得到的二次微商结果能够较好地符合。

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

次：标准形式下的微分方程里最高次序的微商的幂

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。