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It has become one of the important tasks in the study on modern electric system. At first, this text has briefly introduced meanings, the current development and the main methods which the electric load forecasting are used. This paper aimed at the floatability which the load data had and the nature that neural networks model is easy to fall into part infinitesimal value and low iterative speed, this paper proposed a method based on neural networks and SVM. SVM can dispel the less summation and the larger single point errors of neural networks, and the neural networks could dispel the simplification of the model of the vector support machine.

本文首先介绍了电力系统负荷预测的意义、发展现状和主要方法；针对负荷数据具有浮动的特点以及神经网络模型算法容易陷入局部极小和迭代速度较慢的缺点，提出了一种基于神经网络和支持向量机的混合负荷预测方法，此方法能通过支持向量机消除神经网络的总和较小但单点误差较大的不利现象，而神经网络消除了支持向量机的模型简单问题。

In the 50 years since its birth, membrane structure has become one of the mostimportant structures in the field of large span space structures. It is famous for thevariable architectural styles and the light and floating structural properties.

膜结构自诞生至今只有短短50年左右的时间，但以其丰富多变的建筑造型、轻盈通透的结构特性迅速发展成为大跨度空间结构领域重要的组成部分。

Fluorescence in situ hybridization has become one of the important techniques in both medical research and clinical diagnosis.

荧光原位杂交已成为医学遗传学领域中一项极为重要的研究手段。

Sp. cubense, FOC has already become one of the main diseases in banana production.

sp。 cubense，FOC已成为目前香蕉生产中最主要的病害之一，且危害越来越严重。

With the improvement of the people's living standards, housing has become one of the consumption foci of the people.

随着人们生活水平的提高，安居乐业，使住房成为市民消费的热点。

In the 20th century, Lao-tzu has become one of the foci of Chinese studies in the Western world.

只有了解了《老子》的西传史，我们才能客观冷静地看待20世纪西方《老子》研究。

Five Colors also become one of the basic formal language of Chinese apparels.

五色也成为中国服饰基本的形式语言之一。

Ellen never would, or could, quite become one of them—she had left too much of herself in Savannah—but she respected them and, in time, learned to admire the frankness and forthrightness of these people, who had few reticences and who valued a man for what he was.

爱伦永远不想也不能完全成为他们中间的一员----她在萨凡纳时凡事都自作主张惯了----不过她尊重他们，而且渐渐学会了羡慕这些人的坦诚和直率，他们胸无城府，对一个人价也总是从实际出发。

Such has been its strategic importance throughout the years that it has become one of the most fortified places in the world.

这有重要战略意义的地理位置导致了它在漫长的历史长河中成为世界上防御最为强大的地方之一。

Fossilization has become one of the main features of Interlanguage.

语言僵硬现象已经成为中介语的主要特征之一。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！