全生育期有效表达Bt杀虫蛋白的转基因抗虫玉米为靶标害虫的防治提供了新途径。但是,靶标害虫抗性种群的发展严重威胁了转基因抗虫......

本文讨论了圆管内对流换热的机理,在此基础上,基于对流换热的优化理论,设计一种新的纵向扰流装置,即在管内有间隔地插入多个螺旋片......

This paper presents an investigation on the characteristics of overlying strata collapse and mininginduced pressure in f......

The time delay integration charge coupled device (TDI CCD) is the key component in remote sensing systems.The paper anal......

Vegetation plays a key role in improving wind environment of residential districts,and is helpful for creating a comfort......

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