基于UML教务管理系统的设计     

宋炯 《人天科学研究》2009,(4)

提出一种实用的基于UML的需求分析及其建模方法,以概念模型来表达事务模型,以状态图、设计类图及交互图模型表达系统的结构逻辑及行为逻辑,以用况表达系统需求,讨论了需求分析及其建模的过程概念。该方法已经在教务系统需求分析中得到成功应用。  相似文献   

Innovation: The interplay between demand-side shock and supply-side environment     

Ivalina Kalcheva  Ping McLemore  Shagun Pant 《Research Policy》2018,47(2):440-461

We study the interaction between supply- and demand-side factors and its effect on innovation. Employing a quasi-natural experiment, we show that a shift in demand has an impact on innovation and this effect is conditional on an enabling supply-side environment. Specifically, we exploit a shift in product demand generated by Medicare approvals for reimbursement coverage of medical devices. Using a triple-difference approach, we find that innovation is significantly greater for medical device firms that experience a positive shock to demand due to the Medicare approvals when the firms are exposed to a more favorable supply-side environment. The highest level of innovation is accomplished when all three of our supply-side factors: venture capital (industry), universities (academia), and National Institutes of Health grants (government) are concentrated in one place. These findings show that (i) a positive interaction between supply- and demand-side factors fosters innovation, and (ii) the trilateral intersection of industry, academia, and government creates the highest level of innovation.  相似文献   

环境规制、市场需求与生态技术创新——基于34个工业行业的实证分析     

韩庆兰  廖佩君 《科技管理研究》2018,(24):246-254

以我国34个工业行业2001—2010年和2011—2016年两阶段的面板数据为分析样本,实证探究环境规制、市场需求对不同类型行业生态技术创新影响的差异性。研究表明,在重污染(需求推动型)行业中,环境规制对行业生态技术创新的影响由抑制转变为促进;在轻污染(技术推动型)中,环境规制对行业生态技术创新均具有显著正向影响;除重污染(技术推动型)行业,市场需求对其他类型行业生态技术创新均具有显著的正向影响。  相似文献   

论图书馆3G移动视频点播系统的功能及构建   总被引：4，自引：0，他引：4  

王了一 《新世纪图书馆》2009,(1)

论文介绍了3G移动通信的概念,总结了3G移动视频点播系统的优点,以及给图书馆界带来的变革,并在总结相关技术的基础上,提出了3G移动视频点播系统的功能特点和构建策略.  相似文献   

QFD和CE在企业技术创新中的应用初探   总被引：6，自引：0，他引：6  

朱祖平 《科研管理》1998,19(2):52-58

企业是技术创新的主体,但是技术与市场相脱节一直是困扰企业技术创新实践的关键问题。质量由于其在企业经营中的重要性和普遍性成为沟通技术与市场的媒体,以质量为核心建立起来的质量功能展开（ＱｕａｌｉｔｙＦｕｎｃｔｉｏｎＤｅｖｅｌｏｐ－ｍｅｎｔ简称ＱＦＤ）和并行工程（ＣｏｎｃｕｒｅｎｔＥｎｇｉｎｅｅｒｉｎｇ简称ＣＥ）理论与方法对于降低产品开发成本,缩短开发时间和产品符合市场需求等方面被证明是十分有效的,因此在企业技术创新中具有广泛的应用前景。本文通过分析ＱＦＤ和ＣＥ的管理哲理和具体做法,探索它们在企业技术创新中的应用机理,以期能对企业技术创新实践提供具体的、可操作的指导  相似文献   

基于BP神经网络的河南开封市住房需求预测     

范振东 《科技广场》2010,(3):21-23

影响住房需求的因素众多,错综复杂,并且具有非线性的特征。本文通过对住房需求影响因素的分析,用BP神网络来购建住房的需求模型。根据河南开封市的有关统计数据,用BP神经网络优化算法进行住房需求预测,并与多元回归测方法进行对比。结果表明,BP神经网络具有较好的适应性和较高的预测精度。  相似文献   

中产阶层消费需求结构的宏观数量分析——基于ELES模型   总被引：1，自引：0，他引：1  

宋树仁  史亚东  马草原 《科学．经济．社会》2010,28(3):27-32

中产阶层较高的收入和较强的消费能力,以及他们特有的消费文化理念,既引领着消费市场的走向,更影响着供给结构的调整。本文利用2003和2007年中国居民宏观统计数据,运用ELES模型对中产阶层的需求结构进行实证分析。结果显示,中产阶层的基本需求和总体边际消费倾向保持在一个稳定的水平,医疗保健与教育文化娱乐服务的边际消费倾向有所降低,衣着、家庭设备用品及服务、交通通信和居住四类消费品的边际消费倾向均大幅上升;食品、居住占中产阶层消费的主要部分;所有商品皆表现为正常商品;中产阶层的住房的需求结构更多地受供给结构的硬约束。  相似文献   

The organisational stressors encountered by athletes with a disability     

Rachel Arnold  Christopher R. D. Wagstaff  Lauren Steadman  Yasmin Pratt 《Journal of sports sciences》2017,35(12):1187-1196

Organisational stressors have been found to be prevalent and problematic for sport performers, with research identifying demographic differences in the stressors encountered. Nevertheless, extant sport psychology research on the topic of stress has generally focused on able-bodied athletes; whilst that which has been conducted on performers with a disability has typically recruited relatively small samples to explore a narrow selection of organisational stressors, or examined other components of the stress process. The purpose of the present study was to explore the various organisational stressors that athletes with a disability encounter. The sample comprised 18 elite athletes with a disability (10 male, 8 female) who had a classified disability and experience of competing at a major championships in their sport (e.g., Paralympic Games, World Championships). Participants took part in a semi-structured interview which was analysed by drawing from grounded theory procedures. A total of 316 organisational stressors were identified, which were abstracted into 31 concepts and four, previously conceptualised, exploratory schemes: leadership and personnel issues, cultural and team issues, logistical and environmental issues, and performance and personal issues. This study not only provides the first illustration of the prevalence of organisational stressors for athletes with a disability, but also significantly points to salient similarities and distinct differences between the stress experiences of performers with and without a disability.  相似文献   

我国现代体育旅游需求产生的原因探析     

宋在国  贺新家 《和田师范专科学校学报》2006,26(3):26-27

运用文献资料法和逻辑推理法,分析了我国体育旅游需求产生原因,指出体育旅游需求产生和发展是主观因素和客观条件共同作用的结果。  相似文献   

社会科学研究的信息需求及对策   总被引：1，自引：0，他引：1  

张海红 《青海师专学报》2005,25(1):123-125

地方社科院文献信息部门应针对新时期社会科学研究的信息需求，调整馆藏结构的服务手段，为社科研究者提供积极有效的信息服务。  相似文献