鸦科Corvidae 混群鸟大嘴乌鸦Corvus macrorhynchus、秃鼻乌鸦C.frugilegus、白颈鸦C.torquatus、寒鸦C.monedula、达乌里寒鸦C.mo......

提出一种新的，已获专利的多相交叉升压电路拓扑（专利申请号No.00257426&00130365),使用这种多相电路拓扑，可将电力电子产品的有源功率......

Background:Anthropogenic disturbance can negatively affect an animal's energy budget by evoking movement responses.E......

The role of N2 fixation in structuring plant communities and influencing ecosystem function will be potentially large. I......