了解电力系统短期负荷预报的现状，总结国内外的研究方法。
Looking into the present condition of power system short-term load forecast and summarizing research method in the world.
本文对国内外再生骨料和再生骨料混凝土的研究现状进行了分析，总结了再生骨料和再生骨料混凝土的基本性能。
The obtained results about the present research of the recycled aggregate and recycled concrete were analyzed and the basic behaviour was summarized in this article.
第二章总结了国内外关于建筑物不同使用年限抗震设防标准的研究现状。
In chapter two, it summarizes the development and research on seismic fortification criterion of buildings in our country and overseas.
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