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   

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   

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   

C语言的指针   总被引：1，自引：0，他引：1  

杨素英 《大连大学学报》1997,(2)

以具体实例详细介绍了C语言指针复杂说明的理解方法;分析指针使用中的常见错误及解决方法;利用指针和动态分配函数实现程序运行中堆的自由空间的支配和释放。  相似文献   

绿色化学浅谈     

宫惠峰 《邢台职业技术学院学报》2004,21(3):34-35

化学工业在给人类带来丰富的新产品的同时，也给人类带来了严重的环境污染。于是，绿色化学应运而生，绿色化学的理想在于不再使用有毒、有害的物质，不再产生废物，不再处理废物，它是一门从源头上阻止污染的化学。本文简要介绍了绿色化学的起源、特点、原则和研究进展。  相似文献   

Visual Basic中的菜单设计原则和编程技巧     

方园 《北京工业职业技术学院学报》2003,(4)

论述标准Windows应用程序界面设计的基本原则,主要是菜单的设计原则。以及在VB环境中菜单制作的方法和动态菜单实现。  相似文献   

动态地址数据库服务器的连接实现     

黄宏本 《广西大学梧州分校学报》2005,15(3):87-90

本文首先介绍目前对连接动态地址数据库服务器技术的需求,接着给出一种连接构架于动态地址上的数据库服务器的实现方法,并用Delphi实现通过.  相似文献   

关联理论与语用推理     

申开敏 《海南师范大学学报(社会科学版)》2004,17(5):117-120

关联理论认为，语言交际是一个示意——推理的认知过程，认知的实现在于它本身所体现出来的关联性。因此，关联理论框架下的言语交际活动是一个有目的、由说话人示意、听话人推理的动态过程。论文着重分析关联理论对语用推理的解释。  相似文献   

风险认知与决策领域的研究现状分析   总被引：1，自引：0，他引：1  

杨刘敏 《内江师范学院学报》2007,22(3):56-58

风险决策是指决策者在面临两个或两个以上不确定的决策后果,尤其是在面对伴有负面结果的可能性时,所产生的复杂心理过程.对个体风险知觉的探究主要包括风险认知与风险偏好两个方面.风险决策常常涉及多个不确定性的负面结果.因此,个体所知觉到的风险情景也不会是单一的,对动态决策模型的研究成为决策科学发展的一个重要方向.  相似文献