逼近

The mechanism of the least squares approximation that MFNN with finite nodes carried out on a given discrete point set is made, which, for the first time, results in an important theorem.

分析了有限规模多层前向网络用于离散点集上的最小二乘逼近的机理，首次给出了一个有关的定理。

These work has laid the foundation for the study of distributed parameter systems.

本文力图采用正交函数逼近方法探索这一新的途径。

By means of the projection method,adding a small disturbing function to the objective function, the penalty method, andthe gradient method, this dissertation proposes several neural networks for solvingsaddle point problems and minimum radius of ball-coverings problems, and investi-gates the stability of the proposed networks by the LaSalle invariance principle andthe Lyapunov method, so as to design neural networks which avoid getting stuck inthe local minimum.

本文针对约束鞍点问题和球覆盖最小半径的计算问题，分别利用投影法、对目标函数加上很小"扰动函数"的逼近法、罚函数法和梯度法等建立神经网络模型进行求解，并基于LaSalle不变集原理和Lyapunov直接法等工具，对模型的动态特性进行研究，从而设计出避免陷入局部极小的优化计算神经网络模型。

From the view of the syllabic structure , the main body in colloquial lan- guage is the disyllabic words, while in literary language, the number of monosyllabic words is slightly less than that of the disyllabic words.

现代汉语中的口语词与书面语词之间的差异是极其明显的：从音节结构来看，口语词中双音节词占绝对优势，而书面语词中，单音节词的数量逼近双音节词的数量。

Furthermore, it is shown that the design of the ar- bitrary matrix plays an important role in the enlarging the domain of attraction and then improving the convergence of UKF significantly.

基于UT的二阶或者三阶逼近，我们研究了算法收敛的充分条件，并进一步证明了如何选取合适的矩阵来提高UKF算法的收敛性。

The drencher started and the flood approached.

世界开始大雨滂沱。潮汛渐次逼近。

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。

Base on the mesh dual operation, we propose a novel hexagonal based subdivision algorithm, named honeycomb subdivision.

这里的创新点在于细分插值和细分逼近的统一以及方向性约束的引入。

Cybermen advances over the years have been rightly accorded iconic status in the show's history. Their emergence from the sewers in 1968's 'The Invasion' gave us the memorable imagery of the Mondasian monsters stomping down the steps of St Paul's Cathedral, while 1981's 'Earthshock' featured the Cybermen bursting free from their hiding places to march in formation towards The Doctor on the bridge of a space freighter.

这些年来Cybermen的改进，使其有了此剧历史上的标志性地位。1968年的《入侵》中他们在下水道的出现给了我们值得纪念的，Mondasian怪物重重踏下圣保罗大教堂楼梯的形象，而在1981年的《地震》中有Cybermen从藏身之地涌现，列队逼近在一艘太空货船上的博士的景象。

In addition, the ring current is driven earthward (which energizes its particles further), temporarily modifying the field around the Earth and thus shifting the aurora closer to the equator.

此外环电流被逼近地球，进一步加强了其粒子能量，暂时地改变地球附近的磁场，使得极光向赤道靠近。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。