逼近的

That do not require derivative information and approximate the objective function without recourse to Taylor expansions.

虽然是有益的，我们觉得基于泰勒展式的分类法脱离了基本的问题。正如[27]，我们更强调逼近的构建，而不是他们构建的机制。

By extracting the output data of the controlled system and making use of the optimal consistency approach of Chebyshev orthogonal polynomial in dealing with data, the base function of system s output predictive model is derived.

利用chebyshev正交多项式在数值方面最佳一致逼近的特性，结合对被控系统输出数据的信息，经过特征提取，构造chebyshev 基函数，建立系统的输出预测模型，作为模糊控制的附加决策项。

In this article, a class of nonlinear elliptic boundary value problems with singular coefficient in one-dimensional domain was considered.first of all existence and uniqueness of the weak solution of the variational problem correspondin

本文考虑如下一维四阶非线性奇异边值问题 Lu=D~2p(xD~2u-Dp(xDu+pu=fx，u(x x∈I≡(0，1)u(0)=u′(0)=0 u(1)=u′(1)=0的有限元方法。给出相应问题广义解的存在唯一性和先验估计，并通过与解的E-范数投影相比较得到Galerkin逼近的L_2和最大

The concept of controlled λ-exponentially contractive set for the systems is introduced,and relation between the set and that for its Euler approximation discrete-time system is also established.

首先，引入连续时间系统的受控λ-收缩集概念，并建立了与其Euler逼近的离散系统的受控收缩集之间的关系。

Based on the rule that all the coordinate value of the basic vector is integral in coordinate plane, an algorithm for approaching the reference vector in coordinate plane was drawn out, which is easy to be realized by arithmetic and rounding operation.

本文根据基本矢量在两相坐标平面的坐标都是整数的规律，总结得到了在两相坐标平面下对参考电压矢量进行逼近的算法，该算法只需要进行简单的四舍五入与加减运算，易于实现。

Compared with the traditional discrete wavelet transform, the dual tree complex wavelet transform has the properties of approximate shift invariance and more directionality. These properties are good for tracing, locating and preserving image features.

与常用的离散小波变换相比，该方法具有逼近的平移不变性和更多的方向选择性，有利于特征的跟踪、定位和保留。

Then as for an arbitrary initializing bisymmetric matrix, we just need to get the bisymmetric solutions of the new equation in finite steps by applying the iterative method.

并将求最佳逼近的问题转化为求一个新方程的极小范数解的问题，同样可用迭代法求解。

As with Yeats, the very possibility of death's approach gives a new urgency and a new energy to the apprehending eye.

与叶芝一样，步步逼近的死亡气息给予了诗人新的冲动，赋予了理解世界的新源泉。

A snowstorm headed for the city is expected to roil the overfilled river, testing the levees built to protect the city from a major flood.

一场逼近的暴风雪将掀动满溢的河水，为保护城市免遭大水而修建的堤坝将经受考验。

Some of the Gauleiters in the endangered areas shard their views.

那些敌军逼近的地区的大区长们，也和他们持同样的立

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。