This paper is carried out to analyze the buffeting of long-span steel arch bridge in operation and erection stage. The research is mainly focused on the following aspects: Based on the present AR method, the AIC rule is used for fix the rank of the AR model to improve the simulation precision. Take into account that the wind speed spectrum is vary with the height for the long-span steel arch bridge, simulate the fluctuating wind field.

主要工作有以下幾個(gè)方面：通過(guò)對(duì)現(xiàn)有的AR法進(jìn)行改進(jìn)天堂网综合网，采用最小AIC(A-Information Criterion)準(zhǔn)則準(zhǔn)確識(shí)別模型階數(shù)，提高AR法的計(jì)算精度操操日日，并考慮大跨度鋼拱橋風(fēng)速譜隨高度變化的特點(diǎn)嗯啊快点视频在线观看，實(shí)現(xiàn)了對(duì)三維空間脈動(dòng)風(fēng)場(chǎng)的有效模擬。

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It was a good long laugh, and a tempestuously wholehearted one, but it ceased at last--long enough for Mr. Burgess to try to resume, and for the people to get their eyes partially wiped

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J. Li in leaf shape, but differs by plants taller, up to 160 cm, rooting at 20–26 base nodes, adventitious roots 10–16 cm long, pedicels longer than bracts, 4–5 mm long. The pollen morphology, tepal and fruit microcharacteristics of the new variety and its relatives were comparatively observed under the scanning electron microscope.

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