管理信息系统的报表统计策略     

黄艳  谭同德  朱会东  唐浩 《南阳师范学院学报》2003,2(12):52-54

总结了在管理信息系统开发中一般报表统计的常规策略，并特别针对育龄妇女管理信息系统中报表统计处理数据量大、统计速度慢等难点和关键问题，给出其报表统计模块的具体实现方法。  相似文献   

氨基苯酚的干法羧基化反应研究     

李萍  朱琼  胡丽蓉  李全忠  雷光东 《内江师范学院学报》2006,21(4):42-44

在密闭的容器中,在0.3-0.5M Pa的CO2压力下,将氨基苯酚和碳酸氢钾按物质的量1∶2混合均匀,在180-190℃加热3-4小时,进行干法羧基化反应。实验结果表明:此法对间-氨基苯酚的羧基化效果较好,其产率可达74%,而对邻-氨基苯酚和对-氨基苯酚的羧基化效果较差;羧化反应机理可能是酚氧负离子与CO2光加成,再按Schm idt进行重排。  相似文献   

利用GoWeb、PubMed及ISIS系统评价医学期刊对研究热点的把握度     

宋国营  常春  苏楠  张媛  郭瑞  石朝云  熊曾 《编辑学报》2016,28(5):453-456

以哮喘机制研究为例,使用GoWeb生物医学专业搜索引擎搜索学科领域研究热点,以PubMed文献检索服务系统来源的国外权威期刊和ISIS系统检索获得的国家自然科学基金项目为评价标准,比较国内权威医学期刊对学科领域研究热点及其发展趋势的把握度.结果发现,免疫学、气道重塑、表观遗传学为哮喘机制研究3大热点,三者发文量或项目数占比之和由高到低排列分别为《中华医学杂志》(96.0％)、国家自然科学基金项目(89.5％)、国外权威期刊(87.0％)、《中华结核与呼吸杂志》(75.7％).与国外权威期刊及国家自然科学基金项目相比较,国内权威期刊中免疫学机制比例较高,而气道重建比例较低,表观遗传学研究见于国外权威期刊、国家自然科学基金项目及《中华医学杂志》中,发文量或项目数占比基本相当;在国内期刊中,《中华医学杂志》对哮喘机制研究热点的把握度较好.基于GoWeb对科技期刊研究领域进行对比分析有利于医学期刊及其编辑把握有关领域的研究热点及其发展趋势,组织发表紧跟国际研究热点的高水平的医学科研论文.  相似文献   

论水资源管理中的行政分割及其对策   总被引：6，自引：0，他引：6  

黎元生  胡熠 《福建师范大学学报(哲学社会科学版)》2004,(4):54-57

当前我国水资源管理中存在的流域机构权威缺失、条块分割、块块分割和部门分割等体制性缺陷 ,要通过加强流域机构与地方政府协作、建立水资源市场化配置机制、促进流域经济一体化和实现水资源管理职能综合化等措施 ,以此构建水资源管理中的利益协调机制  相似文献   

DNA生物大分子的动力学特性与生物功能(Ⅱ)     

庞小峰 《商丘师范学院学报》1996,(Z2)

对ＤＮＡ中激发的孤立子进行了分类，同时也研究了它的一些特点．我们着重研究了用此理论解释ＤＮＡ的基本生物功能──复制和转录及遗传与变异等问题．  相似文献   

儿童单纯性肥胖的运动干预原理与方法研究     

徐伟  张艳粉  孔雪燕  朱慧  华俊皓  侯振宇 《湖北体育科技》2016,(6):492-494

儿童肥胖率持续上升已经成为一个全球性问题,引起了社会各界的高度关注。为能够让更多人了解运动的减肥原理,正确应用运动减肥的方法,有效预防、干预儿童单纯性肥胖,依据儿童身心发展的特征和规律,对儿童单纯性肥胖的危害、诊断方法、表现特征、诱发原因,以及运动干预的原理和方法,做了详细的分析和阐释。  相似文献   

固定资产投资与国内生产总值的误差修正模型研究   总被引：2，自引：0，他引：2  

王伏虎 《江苏理工大学学报(社会科学版)》2005,7(6):85-89

运用协整理论和误差修正模型研究固定资产投资和国内生产总值之间的关系，可以发现它们之间存在长期均衡的协整关系，使用误差修正模型比普通的单变量方程更能反映两者长期和短期的关系，还可以避免谬误回归问题。  相似文献   

英语夸张辞格的心理机制及其审美功能     

刘蓉 《青海师范大学学报(哲学社会科学版)》2006,(2):119-123

本文以审美心理学为依据,从三个方面分析了英语夸张辞格生成的心理机制———审美求异心理、审美知觉的选择性,审美情感以及审美想象;并根据其心理机制,论述了英语夸张辞格创造出的形象美、意象美和意境美。  相似文献   

Hip and upper extremity kinematics in youth baseball pitchers     

Taylor Holt 《Journal of sports sciences》2016,34(9):856-861

The purpose of this study was to examine the relationship between dynamic hip rotational range of motion and upper extremity kinematics during baseball pitching. Thirty-one youth baseball pitchers (10.87 ± 0.92 years; 150.03 ± 5.48 cm; 44.83 ± 8.04 kg) participated. A strong correlation was found between stance hip rotation and scapular upward rotation at maximum shoulder external rotation (r = 0.531, P = 0.002) and at ball release (r = 0.536, P = 0.002). No statistically significant correlations were found between dynamic hip rotational range of motion and passive hip range of motion. Hip range of motion deficits can constrain pelvis rotation and limit energy generation in the lower extremities. Shoulder pathomechanics can then develop as greater responsibility is placed on the shoulder to generate the energy lost from the proximal segments, increasing risk of upper extremity injury. Additionally, it appears that passive seated measurements of hip range of motion may not accurately reflect the dynamic range of motion of the hips through the progression of the pitch cycle.  相似文献   

Timescales for exploratory tactical behaviour in football small-sided games     

Angel Ric  Robert Hristovski  Bruno Gonçalves  Lorena Torres  Jaime Sampaio  Carlota Torrents 《Journal of sports sciences》2016,34(18):1723-1730

The aim of this study was to identify the dynamics of tactical behaviour emerging on different timescales in football small-sided games and to quantify short- and long-term exploratory behaviour according to the number of opponents. Two teams of four professional male footballers played small-sided games against two different teams with a variable number of opponents (3, 5 and 7). Data were collected using a combination of systematic observation and a non-differential global positioning system (15 Hz). The temporal diversity and structural flexibility of the players were determined by calculating the dynamic overlap order parameter q, entropy and trapping strength. Analysis of the exploratory dynamics revealed two different timescales, forming a different metastable landscape of action for each constraint. Fast dynamics lasted on average a few seconds and consisted of changes in tactical patterns. The long timescale corresponded to the shared tasks of offence and defence lasting tens of seconds. The players’ tactical diversity decreased with an increasing number of opponents, especially in defence. Manipulating numerical imbalance is likely to promote changes in the diversity, unpredictability and flexibility of tactical solutions. The fact that the temporally nested structure of constraints shaped the emergence of tactical behaviour provides a new rationale for practice task design. The manipulation of numerical imbalance on the timescale of a few tens of seconds, on which the exploratory behaviour of players saturates, may help coaches to optimise the exploratory efficiency of the small-sided games.  相似文献