关于高校助学金工作的新探索

通过对当前我国高校助学金和助学金工作现状．及其对学生的负面影响的分析．提出建立高校无息借款助学储备金，变助学金无偿资助为有偿资助的新的高校助学金使用方式。     

复杂潮流条件下导管涡轮机的水动力学性能研究

为了探究导管涡轮机在复杂潮流条件下的非定常性能,依据斋堂岛海域的潮流条件,采用计算流体力学(CFD)数值模拟方法分析了浸没深度和偏流角对导管涡轮机水动力学性能及尾流场流态的影响.研究结果表明:不同浸没深度和偏流角下的导管涡轮机水动力学性能均表现出与波浪频率一致的时间周期性行为;在波流作用下,随着浸没深度的减小,水流将发生强烈的跃迁,由波流引起的水动力学性能波动幅值增大;在波流与偏流共同作用下,随着偏流角的增大,导管涡轮机的平均功率系数及推力系数逐渐减小.此外,水动力学性能在叶轮旋转周期内将出现额外的周期性波动,该波动频率由叶轮转速和叶片数决定,且波动幅值随着偏流角的增加而增大,导管涡轮机后方的尾流场结构也将变得相当不稳定和复杂.     

三明市气象为农服务现状和发展对策

分析三明市气象为农服务的现状,针对当前存在的预报准确率相对不高、服务不够精细等主要问题,提出新时期气象为农服务的发展思路。     

我国木薯产业的发展趋势与市场分析

对我国的木薯种植，木薯淀粉(变性淀粉)，木薯酒精行业的发展现状进行阐述，展望其发展趋势。     

河北省肉牛发展现状、问题与建议

本文通过对河北省肉牛存栏数、养殖模式、品种改良、饲养管理等方面的调研,分析了河北省肉牛业发展的现状和存在问题,提出了河北省肉牛业发展的思路和建议。     

信息素质教育背景下医学院校计算机教学探究

从我国新医疗改革背景出发,分析了医学院校的计算机教学现状,结合自身的教学经验,提出全面提高医学生信息素质的方法。     

220kV电流互感器异常情况分析与处理

末屏介损测量是电流互感器故障检测中非常重要的一项试验项目。对一起电流互感器发生异常情况的实例进行判断与综合分析,指出末屏介损测量的重要性,旨在为处理220kV电流互感器异常情况提供参考。     

Comparison of evapotranspiration and energy partitioning related to main biotic and abiotic controllers in vineyards using different irrigation methods

Knowledge of evapotranspiration (ET) and energy partitioning is useful for optimizing water management, especially in areas where water is scarce. A study was undertaken in a furrow-irrigated vineyard (2015) and a drip-irrigated vineyard (2017) in an arid region of north-west China to compare vineyard ET and energy partitioning and their responses to soil water content (SWC) and leaf area index (LAI). ET and soil evaporation (E) and transpiration (T) were determined using eddy covariance, microlysimeters, and sap flow. Seasonal average E/ET, T/ET, crop coefficient (Kc), evaporation coefficient (Ke), and basal crop coefficient (Kcb) were 0.50, 0.50, 0.67, 0.35, and 0.29, respectively, in the furrow-irrigated vineyard and 0.42, 0.58, 0.57, 0.29, and 0.43 in the drip-irrigated vineyard. The seasonal average partitioning of net radiation (Rn) into the latent heat flux (LE), sensible heat flux (H) and soil heat flux (G) (LE/Rn, H/Rn, and G/Rn), evaporative fraction (EF) and Bowen ratio (β) were 0.57, 0.26, 0.17, 0.69 and 0.63, respectively, in the furrow-irrigated vineyard and 0.46, 0.36, 0.17, 0.57 and 0.97 in the drip-irrigated vineyard. The LE/Rn, H/Rn, EF, and β were linearly correlated with LAI. The E, Kc, Ke, E/ET, LE/Rn, LEs/Rn (ratio of LE by soil E to Rn), H/Rn, EF and β were closely correlated with topsoil SWC (10 cm depth). Responses of ET and energy partitioning to the LAI and SWC differed under the two irrigation methods. Drip irrigation reduced seasonal average E/ET and increased average T/ET. From the perspective of energy partitioning, seasonal average H/Rn increased whereas LE/Rn, especially LEs/Rn, decreased. Compared with furrow irrigation, drip irrigation decreased the proportion of unproductive water consumption thereby contributing to enhanced water use efficiency and accumulation of dry matter.     

兴宁市农业科技创新发展现状与对策

介绍了兴宁市农业科技创新发展现状,并针对存在的问题,提出了相应的发展对策,以转变农业发展方式,认真实施科技兴农战略,加速农业科技推广应用,以期为推进兴宁市现代农业发展提供参考。     

河北省普通高校体育保健课的现状及对策研究

体育保健课是普通高校体育课程的重要组成部分,通过对河北省普通高校的问卷调查,研究河北省普通高校体育保健课设置的现状及存在的有关问题,寻求提高保健课教学质量的方法与对策,使每一名伤残、病弱的大学生都能接受良好的高等体育教育。