To obtain a greater yield per unit rainfall is one of the most important challenges in dryland wheat production. Highly ......

玻尔（ＮｉｅｌｓＨｅｎｒｉｋＤａｖｉｄＢｏｈｒ１８８５～１９６２）丹麦理论物理学家，现代物理学创始人之一．１８８５年１０月７日生于哥本哈根，１９０８年毕业于哥本哈根大学．１９０７年还在大学读书期间就以关于精确测定水的表面......

For two-phase polymer blend systems, the phase inversion will take place as the blendcomposition is changed. In this pap......

尼尔森体系钢管混凝土刚性系杆拱桥能提供较大的纵向刚度和良好的动力性能。以满足铁路重载和高速运行的要求。江苏某桥采用先拱后......