絮状污泥降解过程的动力致因分析

从宏观角度提出了絮状污泥的传质物理模型,该模型指出:利用高分子有机药剂使形成的絮状颗粒污泥,在适当剪切条件下始终维持"包裹-破裂-再包裹"不断循环的过程.絮状颗粒污泥内部微生物与氧气、有机物等物质的接触、吸附和捕获的几率大大提高.并从絮体比表面积的更新频率的角度推导其生物降解的动力学模型.图2,参10.     

过渡金属卤化物和羧酸盐簇合物的键价计算与分析

运用原子簇化合物键价计计算公式,对过渡金属卤素和氧簇合物成键情况进行了分析,这类簇合物既可以形成M－M多重键,又具有空轨道,可增加σ配体,其价轨道总数与金属键数目成线性关系。     

感戴情绪视角下的大学生道德教育研究

感戴情绪作为一种积极的道德情绪体验,不但具有鲜明的道德属性,而且有激发动机、激励及调控等道德功能.通过开设大学生感戴情绪课程,提升道德动力；设计大学生感戴情绪主题,增强道德激励作用；创造大学生感戴的心理氛围,发挥道德的调控功能,可以提升大学生感戴情绪水平,破解目前道德教育困境.     

优化教育学科教学管理,提高高师学生职业素质

高师教育学科的课程目标主要是培养学生的教师职业素质 ,使之成为真正合格的教师 ,欲达成此目标 ,需优化教学管理 :健全教学组织机构 ,建设素质优良的师资队伍 ;增加经费投入 ,改善教学条件 ;建章立规 ,强化教学管理机制 ;重视学生的教育实践 ,改革教学方法手段 ;运用考核评估杠杆 ,推动学生加强职业素质修养     

攻击机靶场效能随机型指标体系研究

针对作战飞机效能分析中长期存在的效能指标不准确、不统一 ,且指标计算方法繁杂等问题 ,在阐述攻击机靶场效能基本概念的基础上 ,运用随机系统理论 ,提出了对各种类型地面目标射击时的攻击机靶场效能随机型指标 ,并给出了相应的靶场效能指标计算方法。所有随机型指标构成完整的靶场效能指标体系 ,从而使攻击机靶场效能度量更为全面和准确     

攻击机靶场效能模糊型指标体系研究

针对攻击机靶场效能随机型指标存在的不足 ,以模糊系统理论为基础 ,提出了一种新型靶场效能指标——模糊型效能指标 ,并给出了对各种类型地面目标射击时 ,相应的靶场效能模糊型指标算法 .     

Bismuth( Ⅲ ) Salts: Green Catalysts for Organic Transformations

1Introduction Bismuth, the heaviest stable element in the periodic table, stands out from other heavy elements (such as mercury, thallium and lead) due to its relatively non-toxic character which confers on bismuth the enviable status of being an eco-friendly element. Therefore, bismuth and its compounds hold considerable promise as useful catalysts for green chemistry. The research presented in this communication is devoted to the applications of bismuth( Ⅲ ) salts as catalysts for organic transformations.After some general comments about bismuth and a short presentation of the various applications of bismuth( Ⅲ ) salts in organic synthesis, this communication will focus on the works done in our research group during the last several years which deals mainly with electrophilic substitutions. When appropriate, some mechanistic details will be given.     

高纯度烟草过氧化物酶的酶学特性研究

从K326的烟叶中采用除植物褐色素新技术，经分离纯化，得到单一过氧化物酶I（TOP I），该酶是一种以血红素为辅基的含铁蛋白质。基质辅助激光解吸电离飞行时间质谱（MALDITOF－MS）测得TOP I分子量为21888．5Da，等电点pI为3．5；酶反应的最适pH为6．0，最适温度为45℃，70℃保温15min残余活力为50％，具有良好的热稳定性，动力学分析表明：烟草中的过氧化物酶I与愈创木酚（一元酚）结合力最强，邻苯二酚（二元酚）次之，焦性没食子酸（三元酚）作用较小。TOP I和Km(愈创木酚）为0．132mmol/L;Km(H2O2)为0．598mmol/L.N3^-,CN^-1,Fe^3 ,Fe^2 和Sn^2对酶有较强烈的抑制作用，重金属离子Ag^ ,Pb^2 ,Cu^2 对该酶的活性有激活作用，而NO2^-、Hg^2 ,Cr^3 对酶活力无显著影响。     

两种射击方式下航空武器作战效能计算及其比较分析

齐射与连射是空一地攻击中最常采用的两种射击方式，以往的研究集中于独立连射下武器射击效能，而对齐射方式下武器射击效能未予足够重视。针对该问题，文章提出了对单个坚固目标攻击时，两种不同射击方式下空-地武器作战效能计算方法，而对每一种射击方式又考虑了多种不同情形，并进行定量的比较分析，为空-地武器的射击决策提供了依据。     

Strontium isotope evidence for landscape use by early hominins

Ranging and residence patterns among early hominins have been indirectly inferred from morphology, stone-tool sourcing, referential models and phylogenetic models. However, the highly uncertain nature of such reconstructions limits our understanding of early hominin ecology, biology, social structure and evolution. We investigated landscape use in Australopithecus africanus and Paranthropus robustus from the Sterkfontein and Swartkrans cave sites in South Africa using strontium isotope analysis, a method that can help to identify the geological substrate on which an animal lived during tooth mineralization. Here we show that a higher proportion of small hominins than large hominins had non-local strontium isotope compositions. Given the relatively high levels of sexual dimorphism in early hominins, the smaller teeth are likely to represent female individuals, thus indicating that females were more likely than males to disperse from their natal groups. This is similar to the dispersal pattern found in chimpanzees, bonobos and many human groups, but dissimilar from that of most gorillas and other primates. The small proportion of demonstrably non-local large hominin individuals could indicate that male australopiths had relatively small home ranges, or that they preferred dolomitic landscapes.