中印两国勘探开发境外能源战略比较研究

由于中国和印度都面对着同样的国际环境,且基本国情相似,特别是在能源安全方面都面临着相同或相似的问题,即近年来经济呈现高速和持续增长,能源问题,尤其是石油问题已成为制约中印经济发展的最大瓶颈,中印都积极面向全球部署本国的能源战略,为迅猛增长的经济谋求充足的能源保障。我国的能源战略应向石油进口渠道多样化及多方面与石油输出国乃至消费国加强合作的途径发展。     

P-V图与热力学第一定律中的诸量

通过讨论热力学系统在准静态过程ΔE、A、Q诸量与P－V图中过程曲线之间的关系，可直接从P—V图上判断内能的增减、做功正负及热量交换的方向。     

一种高频高跨导JFET的研制

本文研究了一种硅高频高跨导JFET的设计和制造技术，测量结果表明，所研制的器件性能基本达。到了国际上先进公司同类产品的指标参数。     

关于变频调速的应用与节能分析

文章通过分析变频器调速的节能原理,并结合一个热电厂的变频器改造后的实例,阐述了变频调速的节能效果,提高了设备运行可靠性和节能降耗性。     

细胞膜Na+-K+主动输运过程的热力学分析

研究分析了Na^ -K^ 在跨膜主动输运过程中，细胞能量(由ATP分解提供)在各阶段的耗散情况．并且把ATP酶视为一个子系统，探讨了其在一个循环中发生的生物物理过程的规律性，对于深入了解细胞生命活动的内在机制提供了一种有益的研究方法。     

三甲基铝双聚体的结构和键合作用

以杂化理论、闭合的三中心两电子键模型对Al2 (CH3 ) 6之键角、键长等作出合理的解释 ,明确Al2 (CH3 ) 6的空间构型     

质点组内力的功改变质心动能的条件

讨论了质点组内力的功是可以改变质心动能的，以及所满足的条件．     

Influence of moderate intensity physical activity levels and gender on conditioned pain modulation

This study examined the potential influence of moderate intensity physical activity (PA) levels and gender on central pain modulation using conditioned pain modulation (CPM) in healthy men and women. Twenty four individuals (12 men and 12 women) who reported engaging in the moderate intensity PA for 150 min or more per week and 24 individuals (12 men and 12 women) who reported engaging in moderate intensity PA for 60 min or less per week completed a self-report PA questionnaire and a 7-day PA assessment using an accelerometer. Furthermore, the participants completed the CPM testing to evaluate the efficiency of central pain modulation. The active individuals scored higher on the PA questionnaire and spent more minutes for light, lifestyle, moderate and vigorous intensity PA than the less active individuals. The active men and women exhibited comparable magnitudes of CPM, and showed a greater magnitude of CPM when compared to their less active counterparts. However, these beneficial effects of higher dose moderate intensity PA disappeared when time spent for vigorous intensity PA was statistically controlled for. These results suggest that the higher dose moderate intensity PA does not add to the benefits from vigorous intensity PA to further improve central pain modulatory systems.     

青少年体力活动干预新方式——体感游戏对青少年身体活动的影响分析

体感游戏作为体育运动与电子科技的结合产品,对其在青少年体力活动干预方面的研究有重要意义。研究从体力活动的促进、能量消耗、运动康复、社会价值以及心理效应等方面对体感游戏进行分析,发现体感游戏对青少年体力活动有明显促进作用,能满足其锻炼的需求,且对青少年心理健康具有积极地影响,能作为青少年体力活动干预的有效手段之一。     

Structural dynamic responses analysis applying differential quadrature method

INTRODUCTION The differential quadrature method (DQM) was proposed by Bellman and Casti as an analogous ex- tension of the quadrature method for integrals (Bellman and Casti, 1971; Bellman et al., 1972). It can be essentially expressed as the values of the de- rivatives at each grid point as weighted linear sums approximately of the function values at all grid points within the domain under consideration. As a distinct numerical solution technique to obtain the initial and/or boundary …