菌物生物多样性与人类可持续发展

文章对菌物生物多样性从下列三个角度进行了论述。首先,在自然界生物圈中的生物多样性包括物种、基因和生态系统三个层次;而物种多样性则是最基础和关键的。菌物是自然界物种多样性最丰富的两大类生物之一。其次,菌物分类学是研究菌物物种多样性的重要工具。第三,生物信息、菌种以及菌物原型参证的三个存取系统,作为菌物分类学的研究成果,是人类可持续发展所需要的可再生的生物资源的重要支撑系统。最后,为了加强对菌物物种多样性和基因多样性的研究、保护和开发,作者提出了4点建议。     

试析未成年犯罪记录封存制度必要性

未成年犯罪记录封存制度作为刑事诉讼法新设的一项制度,是未成年刑事诉讼程序的重要组成部分。制度之必要性建构在考量未成年犯罪案件特殊性及保护未成年罪犯隐私权基础上。其功能性价值在于保护未成年罪犯免遭社会非规范性评价并促进未成年犯罪者有效融入社会,预防其再犯,降低社会风险。     

纳米储氢合金Ml0.7Mm0.3Ni3.7Co0.7Mn0.4Al0.2制作的储氢电极的电化学性能

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灾备技术的现状与发展

灾备技术是确保信息系统安全和业务连续性的重要手段之一．在对灾备的基本概念、技术衡量指标和相关标准规范介绍的基础上, 重点分析了目前主要的灾备技术, 对灾备技术的发展进行了展望,并对企业的灾备方案提出一些建议,一个完整的灾备方案除技术因素外,良好的管理也非常重要,以期为相关的灾备体系建设提供帮助．     

藏成药七十味珍珠丸中矿物质元素在体内蓄积性水平研究

名贵藏成药七十味珍珠丸是传统藏药的典型代表,疗效显著.其中矿物类药的大量运用为现代医学科学不可理喻,给传统藏医药学的健康发展带来了困惑。以金诃七十味珍珠丸为研究材料,以Wistar大白鼠为试验对象,用等离子体发射光谱(ICP AES)和氢化物原子吸收光谱(HAAS)等分析仪器,测定了对照组和给药组实验动物在连续 1 8周试验期间心、肝、肾等组织器官中的矿物质元素含量水平,阐述金诃七十味珍珠丸中矿物质元素在动物主要组织器官中的长期蓄积性及其对生物机体的毒性效应     

基于哈希函数的查找算法设计及性能分析

查找是计算机程序设计中重要的操作,查找的效率一直是算法分析与设计领域关注的问题之一。在简要讨论传统的顺序查找和折半查找算法的基础上,提出一种基于哈希函数的查找算法。其方法综合了数字分析法和折叠法的特点。本文以图书信息查找为例,设计了查找算法并完成了性能分析。     

Achieving ultrahigh electrochemical performance by surface design and nanoconfined water manipulation

The effects of nanoconfined water and the charge storage mechanism are crucial to achieving the ultrahigh electrochemical performance of two-dimensional transition metal carbides (MXenes). We propose a facile method to manipulate nanoconfined water through surface chemistry modification. By introducing oxygen and nitrogen surface groups, more active sites were created for Ti₃C₂ MXene, and the interlayer spacing was significantly increased by accommodating three-layer nanoconfined water. Exceptionally high capacitance of 550 F g^–1 (2000 F cm^–3) was obtained with outstanding high-rate performance. The atomic scale elucidation of the layer-dependent properties of nanoconfined water and pseudocapacitive charge storage was deeply probed through a combination of ‘computational and experimental microscopy’. We believe that an understanding of, and a manipulation strategy for, nanoconfined water will shed light on ways to improve the electrochemical performance of MXene and other two-dimensional materials.     

镁基储氢合金材料的性能及研究进展

由于资源丰富,储氢容量较高,价格低廉,应用前景广阔等特点,镁基储氢合金材料成为近年来研究的热点,然而其稳定的热力学性和缓慢的动力学性限制了它的应用,因而对镁基储氢合金材料的改性日益成为了镁基储氢合金发展的重要方向,文章对镁基储氢合金材料的性能及改性方法进行了综述,并对其发展趋势进行了展望。     

The influence of pre-warming on the physiological responses to prolonged intermittent exercise

To examine the influence of pre-warming on the physiological responses to prolonged intermittent exercise in ambient temperatures of 21.5?±?0.6°C and relative humidities of 35.7?±?5.4% (mean?±?s), six healthy men performed intermittent treadmill running (30-s bouts at 90% of maximal oxygen uptake separated by 30-s static recovery periods) to exhaustion after active pre-warming, passive pre-warming and pre-exercise rest (control). Exercise time to exhaustion was significantly different between all conditions (active, 51.8?±?7.2?min; passive, 38.5?±?11.1?min; control, 72.0?±?17.2?min; P <?0.05). These changes in performance time were closely associated with a significant decline in both the rate of heat storage and heat storage capacity (P <?0.05). Rectal temperature, heart rate and ratings of perceived exertion were significantly higher during exercise in the two pre-warming conditions than in the control condition (P <?0.05). Ratings of perceived exertion were also significantly higher during exercise following passive pre-warming compared with active pre-warming (P <?0.05). During exercise there were no significant differences in serum prolactin, plasma norepinephrine and plasma free fatty acid concentrations between conditions. We conclude that both active and passive pre-warming promote a reduction in prolonged intermittent exercise capacity in environmental temperatures of 21°C compared with pre-exercise rest. These performance decrements were dependent upon the mode of pre-warming and closely reflected alterations in body heat content.     

影响地下储气库扩容的地质因素研究

本文以板876储气库为例,由影响地下储气库扩容的地质因素出发,对圈闭特征、储层物性特征、断层封闭性、水体特征、盖层特征等因素进行分析,总结了在我国类似地区建设地下储气库进行扩容时所应注意及可充分利用的地质条件,并对其他影响地下储气库扩容的因素作了简要分析。