新型城镇化视野下大学生村官的胜任力探析

大学生村官是推进新型城镇化建设的重要力量,因此,培养高素质的村官成为高校的重要任务之一。文章从浙江省大学生村官的调查入手,分析当前高校对大学生村官的培养现状,通过胜任力理论对大学生村官培养的影响,形成大学生村官胜任力模型的基本框架,并将其应用到培养体系的构建中,从而促进大学生村官胜任力的全面提升。     

城市配网自动化可靠性评估与成本效益分析

实施城市配电网自动化是提高电力系统可靠性的重要技术手段。论述配网自动化技术的机理和特点,探讨配网自动化对可靠性的影响,并对传统的配电网可靠性评估方法进行修正,建立配网自动化可靠性评估模型;通过成本效益分析法,分析配网自动化的经济效益;最后,以某实际配电系统为例验证评估方法的综合效果以及成本效益间的经济性关系。实施配网自动化改造可有效提高其可靠性和经济效益。     

不同围压下茅口灰岩渐进性破坏的试验研究

利用MTS815电液伺服控制刚性试验机进行不同围压下茅口灰岩三轴压缩试验,通过计算绘得相应裂隙体积应变图,分析得出裂纹起始应力、裂纹破坏应力。结果表明:随着围压的增大,应力门槛值均呈非线性增长态势,当围压超过17 MPa时,裂纹起始应力、裂纹破坏应力分别增加48.5%和20.1%,茅口灰岩延性开始增强;裂纹破坏应力为峰值强度的64%~75%,三轴压缩下茅口灰岩裂隙不稳定发展阶段较长;环向应变值随围压增大而增大,当轴力超过裂纹破坏应力进入裂隙不稳定发展阶段,环向应变增大2.7~3.2倍,用环向-轴向应力应变曲线图能较好的反映岩石应力门槛值。     

点击化学应用于合成1,2,3-三唑衍生物的研究进展

1,2,3-三唑是一类具有重要生物活性的杂环化合物,在医药、农药等领域都得到了广泛的应用.点击化学(click chemistry)的代表反应为铜催化的叠氮-炔基Husigen环加成反应.综述了近年来国内外学者使用不同新型催化剂和试剂进行点击化学(click chemistry),用于合成1,4-二取代、1,5-二取代和1,4,5-三取代1,2,3-三唑衍生物的研究进展.     

基于改进模拟退火算法的LUT逆半调模板选择

针对影响LUT逆半调图像质量的模板选择问题,提出了一种基于改进模拟退火算法求取最优LUT逆半调模板算法。该算法能对灰度图像逆半调,还扩展至彩色图像逆半调。彩色图像逆半调时,充分考虑彩色图像R,G,B 3通道之间的相关性,将单通道模板扩展为3通道。实验结果表明:本算法寻得的模板具有全局最优性;与传统模板选择算法相比,利用本算法对灰度图像和彩色图像进行逆半调的结果图在人眼视觉效果上更佳,平均峰值信噪比更高。     

基于粗糙集神经网络的网络安全态势评估方法

为克服多源数据融合中存在信息高维、冗余和噪音等大量不确定性因素给网络安全态势评估带来的复杂影响,提出一种基于粗糙集神经网络的网络安全态势评估方法。该方法既利用粗糙集理论在机械学习、处理冗余信息和特征提取等方面的能力,又结合神经网络处理噪音和任意逼近能力构造出由指标层、离散层、规则层、决策层组成的态势评估模型,并与BP神经网络方法进行对比研究。仿真实验结果表明,所提方法偏差较少,更能客观、准确地分析网络安全状况。     

T-Q diagram analyses and entransy optimization of the organic flash cycle(OFC)

The electrical power generation from low temperature heat source attracts more and more attentions but the temperature mismatching between the heat sources and working medium in the organic Rankine cycle(ORC)becomes an issue.The organic flash cycle(OFC)is an effective solution to this issue.In this paper,the OFC is analyzed by the concept of entransy loss and the T-Q(temperature-heat flow rate)diagram for the heat-work conversion.The equations for cycles of the basic OFC and the OFC whose heat source is the exhaust gas of the turbine in a Brayton cycle(the combined cycle)are derived theoretically and the results indicate that larger entransy loss rate leads to larger output power with prescribed inlet parameters of the hot stream in the discussed cases,which is displayed by the T-Qdiagram intuitively.Two numerical examples demonstrate that the optimal mass flow rate of the working medium for the maximum entransy loss rate is the same as that for the maximum output power.The T-Qdiagram analyses is in accordance with the numerical results.The concept of entransy loss can be used as the criteria for the OFC optimization.     

Analysis of an electricity-cooling cogeneration system for waste heat recovery of gaseous fuel engines

Waste heat recovery(WHR)is one of the most useful ways to improve the efficiency of internal combustion engines,and an electricity-cooling cogeneration system(ECCS)based on Rankin-absorption refrigeration combined cycle for the WHR of gaseous fuel engines is proposed in the paper.This system can avoid wasting the heat in condenser so that the efficiency of the whole WHR system improves,but the condensing temperature of Rankin cycle(RC)must increase in order to use absorption refrigeration system,which leads to the decrease of RC output power.Therefore,the relationship between the profit of absorption refrigeration system and the loss of RC in this combined system is the mainly studied content in the paper.Because the energy quality of cooling and electricity are different,cooling power in absorption refrigeration is converted to corresponding electrical power consumed by electric cooling system,which is defined as equivalent electrical power.With this method,the effects of some important operation parameters on the performance of the ECCS are researched,and the equivalent efficiency,exergy efficiency and primary energy rate are compared in the paper.     

新改革时期社会治理的创新及其使命

社会治理作为国家治理体系的重要内容和有机组织部分,说到底是一种结构性的制度建构和政策安排。社会治理创新和全面深化改革的成效不是一蹴而就的,就像我们走过的35年改革开放路程一样,"系统-协同型"社会治理模式的创设既是新改革时期的一种目标和要求,也是一个社会发育和成长的过程,更是一种培育广泛社会文化共识的价值追求和行动使命。     

基于CAN总线的智能门禁系统的研发

针对智能建筑门禁系统的管理需求,设计基于CAN总线的智能门禁系统。该系统具有技术成熟,稳定可靠的特点。样机测试表明,系统各项主要功能均达到要求,具有低成本和更人性化的优势,有助于门禁系统智能化的发展。