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At first, numerical simulation are made on the temporal developing gas-phase mixing layer where the convective mach number is in the region of subsonic(0.5) and transonic(0.8). For the temporal problem where Mc is 0.5, researches where the computational field contains different numbers of initial disturbances(so-called n period problem) are made respectively, and vortex's types of evolution in mixing layer including different numbers of initial disturbances are investigated; For the temporal problem where Mc is 0.8, the distinct shock let structure is obtained, and its mechanism is analyzed at the same time.

文中首先對對流馬赫數(shù)為亞聲速(0.5)露水夫妻、跨聲速(0.8)的時間發(fā)展單氣相混合層作了數(shù)值研究日韩com，對Mc為亞聲速單氣相時間發(fā)展混合層，分別研究了計算域包含不同數(shù)目的初始擾動周期問題三级片视频第一页，考查了不同周期數(shù)的混合層中渦的不同演化方式激情图片激情小说激情视频；對Mc為跨聲速的單氣相時間發(fā)展混合層，得到了清晰的小激波結(jié)構(gòu)国产雏18女破苞在线播放，同時分析了小激波的形成機(jī)理欧美性爱黄色一级片视频。

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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.

本文首先介紹了電力系統(tǒng)負(fù)荷預(yù)測的意義、發(fā)展現(xiàn)狀和主要方法欧美人视频；針對負(fù)荷數(shù)據(jù)具有浮動的特點(diǎn)以及神經(jīng)網(wǎng)絡(luò)模型算法容易陷入局部極小和迭代速度較慢的缺點(diǎn)亚欧无码真人永久在线，提出了一種基于神經(jīng)網(wǎng)絡(luò)和支持向量機(jī)的混合負(fù)荷預(yù)測方法，此方法能通過支持向量機(jī)消除神經(jīng)網(wǎng)絡(luò)的總和較小但單點(diǎn)誤差較大的不利現(xiàn)象av成网站，而神經(jīng)網(wǎng)絡(luò)消除了支持向量機(jī)的模型簡單問題欧美一级高潮片黑人免费99。

Spinning futilely at first, the drivers of the engine at last caught the rails.

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He kept his word; twice a day he cast out, through the barred aperture , the provisions his jailer brought him--at first gayly, then with deliberation, and at last with regret

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At first the article describes basic theory and principles of precise determination of local geoid. Then discuss and make a research about geometrical method and gravity method at length, respectively.

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Heard of my going to Shishi city,Fujian Province to follow Teacher Liu to learn Happy English ,at first ,My grandpapa,my grandmama,my parents ,my elder brother ,my elder sister and one of my Teachers at ———————— Middle School,all of them don't agree with me .

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Slowly at first, then with a modest momentum, at last the graveward process is in the full swing.

一個人的財產(chǎn)或物質(zhì)方面 www.sSbbww.com 的發(fā)展和他的身體的成長很相像黄色禁看视频。

Slowly at first, then with a modest momentum, and at last the graveward process is in the full swing.

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