A theoretical model is proposed to describe the mechanism of laser-induced plasma shock wave evolution in air. To verify the validity of the theoretical model,
玉米作为重要的粮食和饲料作物,如何最大程度的提高玉米产量是玉米育种的主要目标。为实现玉米高产,育种家把创制耐密型玉米新品种作为主要的育种方向,强调株型育种是提高群体光能利用及协调群体与个体之间矛盾的重要性。为此,本研究利用紧凑型玉米自交系豫82和松散型自交系豫自87-1组配构建的F2:3家系群体为材料,通过对株型性状及产量相关性状在多个环境下进行表型鉴定,分析其遗传特点,并利用已构建的遗传图谱对各
河南省商丘地区农科所经过近10年努力,培育出苗期具有明显标记性状且配合力和丰产性均佳的自交系27-263,该自交系苗芽鞘为绿色,但用27-263X黄早4配制的单交种豫玉1号杂种苗的
It is known that the strength of concrete is seriously affected by damage and cracking. In this paper, six concrete samples under different damage levels are st
As feature size keeps scaling down, process variations can dramatically reduce the accuracy in the estimation of interconnect performance. This paper proposes a
在1991年中国杭州国际茶文化节斗茶会上列名茶新秀第五、被国家旅游局、浙江省人民政府授予壹等奖的“余杭雀舌”名茶,目前在余杭长乐林场通过鉴定。鉴定会由浙江省林业厅主