油菜作为重要的油料作物,提高其单产水平是我国发展油菜生产亟待解决的瓶颈问题。油菜增产途径主要是应用具有高产潜力的优良品种,通过采用不同栽培措施,构建高光效群体来实现的。本试验以9个油菜品种为试验材料,以华油杂9号和华油杂62为主要研究对象,设置不同播期、密度和氮水平,构建不同油菜群体结构,观测全生育期叶片和角果皮面积指数的消长变化,探究各群体指标与产量的关系,以期得出油菜3000kg/hm2高产条
The influence of multi-photon pulses on practical differential-phase-shift quantum key distribution (DPS-QKD) is analysed. We have estimated the information whi
Using transmission electron microscopy (TEM) and x-ray diffraction analysis, we have studied the structural and morphological evolution of highly Er/Yb co-doped
This paper reports on laser surface remelting experiments performed on a Zn-2wt.%Cu hypoperitectic alloy by employing a 5kW CW CO2 laser at scanning velocities
十六大以来,农业部围绕“三农”工作中带有全局性、战略性和前瞻性的重要问题和难点、焦点问题,面向地方农业系统干部,开展了“农业产业结构调整”、“农村劳动力转移”、“
In this paper the multiwalled carbon nanotubes (MWNTs) were synthesized by a chemical vapour deposition and the SEM graph shows that the sample has good constru
The separability of mixed states in multipartite quantum systems is investigated. If a quantum state in a multipartite system with an arbitrary dimension is sep
An array of random-oriented zinc oxide nanowires (ZnO NWs) was fabricated on silicon substrate by thermal evaporation. After a thermal evaporation process, the
磷转运蛋白是介导植株对磷素吸收和转运的主体,在调控植株磷素吸收和利用效率中具有重要作用。本项研究针对迄今有关小麦磷转运蛋白基因研究和报道较少的现状,利用现代生物信息学技术和分子生物学技术,对11个小麦磷转运蛋白基因的分子特征和表达特性进行较全面的研究。主要研究结果如下:1、通过在国际生物信息学网站进行小麦磷转运蛋白基因的查找,获得11个尚未进行系统研究的小麦磷转运蛋白基因,作者依次命名为TaPT1
Higher-order nonlinear Schr(o)dinger equation with the Hirota constraint conditions is considered, and an analytic solution, which can describe the modulational