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关注分离在软件工程上是一种广泛应用的原理,认为难于理解的复杂问题应该被划分为一系列容易理解的简单问题,并且能够容易解决和集成到原处,从而解决原来复杂的问题.由于问题被分解为人容易理解的小单元,而且适合于各种需求的变化,因此这种方式开发软件能够给程序带来更好的可理解性、维护性、适应性和重用性.面向方面编程作为一种基于关注分离的新软件开发范例,能够通过引入实现横切关注点的方面来获得更高的功能性和非功能性关注点的分离,而且系统不同的方面能够进行单独的设计.教字图书馆系统是面向方面技术很好的应用场所,因为在数字图书馆中,有很多非功能需求,且这些非功能需求往往横切整个系统.在数字图书馆系统中关键的就是QoS要求了,这些QoS要求散布在整个系统的功能部件里,带来了代码混乱和代码分散问题.文章利用扩展的UML实现数字图书馆的面向方面的建模,给出了一个QoS面向方面建模的例子. 相似文献
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针对目前盲分离算法还无法满足对语音信号盲分离的精度需求,本文提出一种新型语音信号盲分离算法。该算法在最小增益的语音盲分离算法的基础上,针对其缺陷,引入了广义高斯分布模型,对最小增益的语音盲分离算法的迭代运算进行了优化处理,通过计算每次迭代后恢复出来的每个源的峰度值来增加原算法的分离精度。通过仿真试验进行验证,得到的结果是:改进的算法不仅仅没有失去本真效果,经过分离语音信号,对原始语音信号的波形基本保持在一定的范围内,而且表现出较好的性能。 相似文献
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在我国现代农业技术发展是社会经济发展的基础,而现阶段我国农业科技水平尚不完善。若要提高农业科技水平就需要建立积极有效体制机制。该文主要就我们国家现阶段机械技术水平这一现状,以机械技术推广为例,从机械技术推广存在的问题以及如何进行机械技术推广这两个大的方面来诠释,让我们对机械技术推广有更多的认识,增强人们对机械技术推广的关注点。 相似文献
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【目的/意义】研究社交网络平台用户关注点演化对掌握舆情，制定管理决策具有重要作用。【方法/过程】本
文提出一种基于 Aging theory的关注点交互影响演化模型。该模型将每阶段营养素重新设计为外部来源与其他关
注点转移两类，使用关注点间的相似性作为第二类营养素度量演化过程中关注点交互影响效应，并根据两类营养
素不同比例将关注点划分为突发型与渐变型两种。【结果/结论】通过“厦门 BRT爆炸”的新浪微博数据集验证，该模
型能够刻画上述两种关注点的演化趋势，并对演化原因进行解释。 相似文献
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会计从业人员必须要懂得税收知识,具备税务实际操作能力。税收课程是会计专业至关重要的一门必修课。而目前在中职会计专业的教学中,有些学校甚至不开办税收课程。开展税收教学的,往往存在重理论,轻实务,且财会、税收分离的缺陷。改革税收教学模式,使该课程符合会计专业需求,是笔者所探索、论述的内容。 相似文献
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目的探讨提高冰冻切片病理诊断正确率、降低误诊率的措施。方法对126例冰冻切片诊断与石蜡切片诊断作对照分析。结果良性病变59例,恶性肿瘤63例,不能明确诊断4例,正确率97％,延缓诊断率3％。结论为提高冰冻切片病理诊断正确率、降低误诊率,应做到以下几点：（1）准确的取材;（2）提高制片质量;（3）加强与临床手术医师的勾通;（4）提高病理医师诊断水平。 相似文献
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Rising cyber-crimes have heightened existing concerns about e-banking security. However currently the use of biometric technology in the banking sector is not prevalent. We developed a biometric system for authenticating e-banking and applied the established System Usability Scale (SUS) to evaluate its effectiveness from the perspective of potential users. The case demonstrates that on the whole users are very favourable towards a biometric banking system and ostensibly found the system developed usable. We found that when evaluating the biometric system, its different components needed to be considered – namely the biometric technology and the institutional process that supports verification and authentication. 相似文献
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《International Journal of Information Management》2016,36(5):735-747
Biometric technology is rapidly gaining popularity as an access control mechanism in the workplace. In some instances, systems relying on biometric technology for access control have not been well received by employees. One potential reason for resistance may be perceived privacy issues associated with organizational collection and use of biometric data. This research draws on previous organizational information handling and procedural fairness literature to frame and examine these underlying privacy issues. Perceived accountability, perceived vulnerability, and distrust were distilled from the previous literature as the primary dimensions of employee privacy concerns related to biometric technology. This study assesses the effects of these privacy concerns, how they vary based on the cultural influences of Anglos and Hispanics.Fire ground accountability is a critical management objective in the firefighting domain. In multi-unit or multi-agency crisis response scenarios, the on-scene incident commander tracks and accounts for each first responder. This research designed and deployed a new fire ground accountability system that tracked firefighters through finger pattern-based biometric logins to their assigned positions on the firefighting apparatus. An instrument measuring level of privacy concern on three underlying dimensions and demographic data was developed, validated and administered in a quasi-experimental field study. A pre-test–post-test survey methodology was employed to detect potential differences in privacy concerns as familiarity with the system increased. The study shows that Anglo and Hispanic subjects frame privacy issues differently associated with use of biometric technology in a fire ground accountability system. Finally, the study showed that some privacy concerns such as distrust and perceived vulnerability can be alleviated through system use with changes in post-use privacy concerns moderated by ethnic affiliation. 相似文献
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Previous studies of system innovations mainly focused on historical cases that were driven by commercial motivations of pioneers and entrepreneurs. This article investigates a system innovation in the making that is driven by normative concerns, such as sustainability or animal welfare, initially formulated by outsiders like special-interest groups. Our central research question is: How, when and why is normative contestation of existing regimes effective in influencing the orientation of transitions in the making?The conceptual framework enriches innovation studies and the multi-level perspective with insights from social movement theory (SMT) and political science. SMT is used to analyze the build up of normative pressure (through framing, resource mobilization, and political opportunity structures). From political science we use the notion of multiple streams, in our analysis a problem, regulatory, market and technology stream.The research design consists of a comparative case study of pig husbandry systems. One case analyses the sub-sector of pregnant sows where normative pressures, after several decades, led to the changes advocated by the contestants. The second case concerns the sub-sector of pig fattening where normative pressure was less successful.The difference is partly explained by the normative pressure for pregnant sows being larger than for fattening pigs. The other part of the explanation is that in the first case normative pressure aligned better with the three other streams (regulatory, market and technology) to lead to the changes desired by the contestants. 相似文献
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激光技术是高科技的产物,其产生又推动了科学研究的深入发展,并开拓出许多新的学科领域,激光在电子工业中也得到广泛应用。 相似文献
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Supply chain collaboration is critical to achieving the integration of partners for performance impact. Two major concerns arise, organization's sharing behaviors and technology use behaviors. An organization's sharing behaviors relates to a decision of two perceptions among partners, commitment of network resources and fairness of network resources distribution. Further, technology use behaviors are important for members in IT-enabled supply chain. Social capital and justice issues intend to explain the two particular perceptions as IS success model defining technology use behaviors. This study integrates the three issues to examine their influence on supply chain collaboration and in turn, realized firm performance. Empirical findings report that technology use behaviors are most significant as other two issues are also concerned. 相似文献
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Science and security policy are increasingly overlapping because of concerns that legitimate research might be misapplied to develop biological weapons. This has led to an expansion of security policy to cover broad areas of research and scientific practice, including funding, publishing, peer-review, employment, materials transfer, post-graduate teaching and academics’ ability to design and perform experiments and disseminate research. Such changes raise policy concerns because many of the technologies used to produce biological weapons are ‘dual use’ and have legitimate peaceful applications. As a result, attempts to control their generation, diffusion or application can have unintended impacts on socially beneficial applications. This paper explores recent changes in the governance of science and technology and contributes to future policy making by assessing the relative merits of understanding the development of dual use policy in terms of either technology transfer or technology convergence. 相似文献
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用例分析技术是RUP(Rational统一过程)中进行系统分析的一个主要手段,如何有效捕获需求,规范地描述用例,并充分发挥用例在系统分析中的作用一直是业界研究和应用的热点。本文基于Cockburn的用例模板,提出了一种规范实用的用例分析技术,并通过一个实例对用例分析过程进行了描述。 相似文献
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切片土豆干燥中传质过程模拟与分析 总被引：2，自引：0，他引：2
建立切片土豆内部传质模型，内部传热模型来研究土豆干燥过程的传质模拟，并进行了实验验证，验证结果表明：用整个物料平均水分来间接验证，模拟值和实测值十分接近，二者的最大相对偏差小于9．1％，模拟结果表明：土豆片表层水分在热风的作用下得到蒸发，水分下降很快，在表内水分差作用下内部水分向表层迁移，干燥过程中产生表低内高水分分布规律。 相似文献
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An important aspect of any meaningful public discussion about developments in gene technology is the provision of opportunities for interested publics to engage in sociable public discourse with other lay people and with experts. This article reports on a series of peer group conversations conducted in late 1996 and early 1997 with sixteen community groups in Perth, Western Australia, interested in gene therapy technology. With the case of cystic fibrosis as a particular focus, and using background resource material as a stimulus for discussion, the participating groups explored a range of value issues arising from the new genetic medicine. This more discursive context enabled participants to express a number of background or life-world concerns about genetic medicine, concerns that are often obscured by the dominant biomedical and bioethical discourses. 相似文献
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Digitalizing interorganizational relationships (IORs) concerns B2B partners adopting and using Interorganizational Information Systems (IOSs). The decision to digitalize IORs involves choices about (1) whether or not to digitalize information flows, and (2) which technology to use. We explore whether these two choices are made sequentially or if they are intertwined. Using sequential adoption theory and institutional theory, we investigate the decisions related to digitalizing IORs through data synchronization. In the context of product information in the French consumer goods and retail industries, analysis of 18 case studies (large firms and SMEs) provides empirical evidence on the distinction between the two related decisions and the factors influencing each one. Our propositions integrate institutional pressures, observational learning, organizational capabilities and technological characteristics. 相似文献