中国梦融入高校思想政治理论课教学策略探究 ——以中国近现代史纲要课为例

作为对大学生开展思想政治教育的主渠道,高校思想政治理论课在实现中国梦宣传教育"三进"方面具有得天独厚的优势.以中国近现代史纲要课为例,教师应紧扣中国梦时代主题,整合教学目标、优化教学内容、完善教学模式、丰富教学手段,从而推动中国梦主题教育深入开展.     

DNA与2-磺酸蒽醌三重态相互作用生成阴、阳离子自由基对的直接检测

平面型光核酸酶激发态通过电子转移光氧化定域损伤ＤＮＡ的研究已成为当前的一个热门课题。但是,由于直接检测ＤＮＡ阳离子自由基遇到困难所以未能获得主要瞬态产物,阴、阳离子对的瞬态吸收光谱。中国科学院辐射化学开放实验室在１９７年成功获取了丙酮三重态电子转移光氧化ＤＮＡ和首次确证ＤＮＡ阳离子自由基的基础上,现用激光光解研究了２－磺酸钠蒽醌三重态对ＤＮＡ四种核革酸电子转移光氧化生成的阴、阳离子对。在与光氧化核     

安太堡11#煤元素地球化学特征及环境效应

对安太堡露天煤矿太原组11#煤层样品中41种元素的进行了测试分析。讨论了该煤层中微量元素的富集特征与分布赋存状况以及元素地球化学特征的环境效应。研究表明；除S，U，Se,Br和Mo明显富集之外，其他有害元素的含量较低。对环境的危害性较小；U，Se和Mo以及部分硫赋存在硫化物，碳酸盐及黏土矿物中，用物理洗选方法可以脱除；有机硫所占比例较高，难以脱除。对环境的危害潜势相对较大，但可以考虑化学脱硫，利用过程中脱硫或分层开采的方式来降低硫分对环境的危害程度。     

基于ZigBee组网技术的智慧病房系统设计

针对病房环境难以实时监测和医护人员工作量大等问题,提出一种基于ZigBee组网的智慧病房系统设计。系统以CC2530芯片为核心,采集病房温湿度、病人体温和临床求助呼叫等数据,利用ZigBee组网等相关技术,以无线传输方式将数据传输至上位机,并储存至服务器端,便于医护人员实时掌握数据。从而克服了现有系统成本高、布线复杂、维护困难等问题。实验表明:本系统可以对病人体温和病房环境进行无线监测,同时具有临床求助呼叫功能,满足病房管理与服务的需求。     

煤储层孔、裂隙系统分形研究

对煤层、煤样进行了宏观裂隙及显微裂隙的连续系统观测、统计,计算了煤中各级别裂隙的面密度维数;根据压汞法测出的煤中不同孔径段的连续比孔容数据,计算了煤中孔隙体积的分形维数。分析了分形九与煤层的孔、裂隙发育程度和煤变质程度的关系。为评革层气的吸附与解吸、扩散与渗流、煤与瓦斯突出预测及煤层有效渗透率估算提供了一种更加精确的方法。     

超临界CO_2注入煤岩地球化学效应研究评述

综合国内外超临界CO_2(称scCO_2)注入煤层的试验研究及理论分析,发现scCO_2注入煤储层后必对其物质组成、物理结构产生影响,进而重塑其孔裂隙系统,主要原因是scCO_2-H_2O分别与煤中矿物和煤基质发生地球化学反应。在scCO_2-H_2O-煤岩反应体系中,煤中的矿物会发生溶解—沉淀,其中最敏感的是碳酸盐矿物,其次是长石和黏土矿物,而硫化物矿物(黄铁矿)与石英则相对稳定;scCO_2对煤基质中的小分子有一定萃取作用,进而改变煤大分子结构。影响scCO_2-H_2O-煤岩反应的主要因素有煤中矿物成分、煤岩组分与煤阶、煤储层压力与地温条件以及地层水的矿化度等。由于试验模拟与数值模拟的局限性,对于scCO_2-H_2O-煤岩地球化学响应机制有待深入探索,同时对煤岩孔裂隙网络变化的实时观测与定位研究更为重要。     

炼油厂总流程系统分析与优化

介绍炼油厂图形建模计划优化系统的软件特点及建模思路，以及用线性规划和图形建模技术对炼油厂总流程进行系统分析与优化的应用实例。     

马岛战争中英阿战略决策探析

面对信息战时代日益频繁的高技术局部战争,如何进行切实、快速、准确的战略决策与实施,必将直接关系到战争的进程和最终结局.反观信息战时代"第一战"--英阿马岛之战中英阿双方的战略决策与实施,将会有助于我们理解这一点.     

Selective laser sintering mechanism of polymer-coated molybdenum powder

A type of polymer-coated molybdenum powder used in selective laser sintering technology was prepared by coating polymer on molybdenum particles and frozen grinding techniques, with the maximum particle diameter of 71 μm. The laser sintering experiments of polymer-coated molybdenum powder were conducted by using the self-developed selective laser sintering machine （HLRP-350I）. The method of microscopic analysis was used to investigate the dynamic laser sintering process of polymer-coated molybdenum powder. Based on the study, the laser sintering mechanisms of polymer-coated molybdenum powder were presented. It is found that the mechanism is viscous flow when the laser sintering temperature is between 100 ℃ and 160 ℃, which can be described by a two-sphere model; and the mechanism is melting/solidification when the temperature is above 160 ℃.     

Numerical simulation of temperature field during selective laser sintering of polymer-coated molybdenum powder

The technology of length-alterable line-scanning laser sintering was introduced. Based on the research of laser heating property, powder thermal physics parameters and laser sintering process, a numerical model of the temperature field during length-alterable line-scanning and laser sintering of polymer-coated molybdenum powder was presented. Finite element method （FEM） was used to simulate the temperature field during laser sintering process. In order to verify the simulated results, a measuring system was developed to study the laser sintering temperature field. Infrared meter was introduced to measure the surface temperature of sintering powder; the temperature of its inside part was measured by thermocouple. The measured results were compared with the numerical simulation results; the conformity between them is good and the relative error is less than 5%.