如何做好"教体结合"下业余运动队训练工作的建设

"教体结合"是竞技体育改革的方向,在制定各种指标的过程中,要充分考虑训练的性质与特点,作好目标化、科学化、制度化、档案化建设.     

A theoretical model for mid-and low-latitude ionospheric electric fields in realistic geomagnetic fields

The geomagnetic fields, which play important roles in the ionospheric dynamo, can greatly affect the global distribution of ionospheric electric fields, currents and other ionospheric electrodynamics phenomena. In the study of ionospheric electrodynamics phenomena, such as the longitudinal variations of ionospheric electric fields, the non-dipolar component of the geomagnetic fields must be taken into account. In this paper, we deduce a theoretical electric field model for ionospheric dynamo at mid- and low-latitude which adopt a modified magnetic apex coordinates system. In the new electric field model, the geomagnetic fields can be calculated from either the IGRF model or the dipole field model, and the neutral winds and conductivities are calculated based on empirical models. Then the dynamo equation for the electric potential is finally solved in terms of the line-by-line iteration method, and the ionospheric electric fields and currents are derived from the calculated potential. Our model can reproduce the main features of the ionospheric electrodynamics processes, so it will be a useful tool for the investigation of the upper atmosphere and ionosphere.     

高山松花菜栽培技术

松花菜又称散花菜。是十字花科甘蓝属花椰菜中的一个类型，因其蕾枝较长，花层较薄，花球充分膨大时形态不紧实，相对于普通花菜呈松散状，故此得名。与一般紧实型花菜品种相比，松花菜具有两个显著特点：一是耐煮性好，食味鲜美，很受消费者欢迎。二是早中熟品种耐热性强，适应性更广，近郊可“春延后”和“秋提前”栽培。高山栽培可在夏秋投产。     

农用抗生素离体植物组织平皿筛选模型的设计

为了能够快速、简便、定向地筛出对植物病原真菌选择性强,内吸渗透性好,对酸、碱、光、热相对稳定,具有实际应用价值的农用抗生素,我们设计采用了离体植物组织平皿法新型筛选模型。     

软硬酸碱规则与配合物的稳定性

从路易斯酸碱定义从发，以软硬酸碱规则分析配合物的形成特点，探求配合物稳定性规律，并从热力学角度加以说明。     

辣椒新品种——郑椒先锋辣椒

郑椒先锋辣椒是郑州市蔬菜研究所最新选育的中熟辣椒杂交新品种，是生产红、绿鲜椒的优良品种。     

砷化镓基量子级联激光器研究取得重要进展

量子级联激光器(QCL)是一种基于子带间电子跃迁的中红外波段单极激光光源,其工作原理与通常的半导体激光器截然不同,它利用垂直于纳米级厚度的半导体异质结薄层内由量子限制效应引起的分离电子态,在这些激发态之间产生粒子数反转。该激光器有源区是由耦合量子阱多级串接组成(通