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The architecture of microfluidic networks can significantly impact the flow distribution within its different branches and thereby influence tracer transport within the network. In this paper, we study the flow rate distribution within a network of parallel microfluidic channels with a single input and single output, using a combination of theoretical modeling and microfluidic experiments. Within the ladder network, the flow rate distribution follows a U-shaped profile, with the highest flow rate occurring in the initial and final branches. The contrast with the central branches is controlled by a single dimensionless parameter, namely, the ratio of hydrodynamic resistance between the distribution channel and the side branches. This contrast in flow rates decreases when the resistance of the side branches increases relative to the resistance of the distribution channel. When the inlet flow is composed of two parallel streams, one of which transporting a diffusing species, a concentration variation is produced within the side branches of the network. The shape of this concentration gradient is fully determined by two dimensionless parameters: the ratio of resistances, which determines the flow rate distribution, and the Péclet number, which characterizes the relative speed of diffusion and advection. Depending on the values of these two control parameters, different distribution profiles can be obtained ranging from a flat profile to a step distribution of solute, with well-distributed gradients between these two limits. Our experimental results are in agreement with our numerical model predictions, based on a simplified 2D advection-diffusion problem. Finally, two possible applications of this work are presented: the first one combines the present design with self-digitization principle to encapsulate the controlled concentration in nanoliter chambers, while the second one extends the present design to create a continuous concentration gradient within an open flow chamber. 相似文献
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基层党支部是党在高校工作的基本单元和战斗堡垒,学校的党建工作以党支部建设为重点。由于党建工作政策性强、工作量大、内容琐碎、流程复杂,目前各高校党支部虽然能够按照规章开展工作,但是在党支部建设中还是缺乏系统性和规范性。积极探索党建工作内在规律,深入研究高校党支部规范化建设实践路径,对于加强和改进高校党的建设具有重要意义。 相似文献
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Fulvio Castellacci Magnus Gulbrandsen Jarle Hildrum Ieva Martinkenaite Erlend Simensen 《Research Policy》2018,47(9):1674-1687
Recent research on employee-level innovation focuses on scientists’ ability to source advanced knowledge and use it to create new ideas and innovation within a firm. The present paper introduces a new dimension to this literature: functional departments. We argue that functional centrality, namely the extent to which a functional department is central in the intra-organizational network, affects employees’ innovation intensity. We make use of a rich novel dataset at the employee-level for the Telenor Group, based on a large-scale survey among nearly 16,000 employees in all business units and functions of the company. The empirical results point out that employees’ innovation intensity is higher in departments that are centrally positioned in the company’s internal network. Task characteristics such as quality orientation, entrepreneurial attitude and result pressure moderate the relationship between centrality and innovation. 相似文献
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NX是一种最普及、最优秀的CAD/CAM/CAE软件。笔者结合近几年的教学及工作经验,借助NX软件强大的实体建模功能进行建模,并利用装配功能完成了虚拟模型的创建,然后进行了详细的运动仿真分析。本文简单介绍NX软件的装配模块以及UGNX运动仿真应用于机械结构设计。 相似文献
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基于 SERVQUAL 的专利代理机构服务质量评价研究 总被引：1，自引：0，他引：1
研究构建适用于专利代理机构服务质量的评价指标体系.以SERVQUAL服务质量评价体系为理论基础,研究参考当前现有的知识产权代理机构服务质量评价体系,结合专利代理服务行业的业务特点,兼顾专利生命周期的整个过程,构建涵盖公司质量、员工质量、业务能力、专利质量、用户评价与业务范围五个维度的评价指标体系.研究通过该指标体系评价了江苏省内的200家专利代理机构,结果表明这200家专利代理机构的服务质量整体偏低,本地代理机构服务质量大幅落后于省外机构分支. 相似文献
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目前很多企业、高校拥有多个地理位置分散的分支机构,各个分支之间可以利用公用网络实现办公自动化,但对于企业网或者校园网内部资源却难于在各个分支之间实现共享。针对此类问题,本文分析了VPN的技术原理及相关协议,对VPN技术的应用领域等做了具体阐述。 相似文献
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新时代中随着越来越多的商务活动使用＂云＂,云计算不仅是未来的计算趋势,也是当下和过去的计算主流,它是将计算机和网络相连接,并强调了诸如高弹性容量、大幅减少闲置冗余以及灵活可伸缩性等。纵观甲骨文历史,它不断地在产品和服务上进行自我突破,如今也成功和＂云＂的概念相结合孕育出新一代云服务产品Oracle-12c,其中包含了创新、开放和集成的思想,在改善用户的体验的同时,使Oracle成为唯一一家拥有完整的应用程序和相对应平台的云服务公司,也是唯一的供应商。 相似文献
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商业模式实质上是关于企业价值创造过程的表达方式。随着经济的一体化,企业面临的竞争环境越来越体现出多维特性,从企业内部结构以及外部关联两个方面入手,从企业的经营界面、消费者需求满足程度以及企业纵横向关系三个维度进行企业商业模式的设计,并举例说明了最佳产品、解决方案、产品锁定和价值网络等四种商业模式在企业管理中的应用。 相似文献
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《International Journal of Information Management》2017,37(5):473-483
To explore the relationship of information capital and company performance as mediated by business processes, we sought to establish an analytical framework based on knowledge based view for international trade companies to better develop the innovative capacity of holistic thinking processes of domestic trade enterprises. Using structural equation modeling as part of an analytical research framework, we found that information capital can indirectly affect company performance when mediated by business processes, and that information capital is more critical to the trade industry. This finding reveals that adopting and assimilating information systems form an important channel for companies to provide strategic information and use information capital. We highlighted that the improvement of information capital can significantly enhance a company’s competitiveness and that, since business processes play key mediating roles, the timely adjustment of such processes can allow information capital to enhance company performance of the international trade industry. 相似文献
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采用Eclipse RCP和SWT,利用Java语言采用面向对象的设计方法,以曲柄滑块机构的运动仿真为例,实现了仿真建模、仿真系统设计、仿真结果输出和仿真数据采集等功能,从而为独立的和跨平台应用的仿真系统设计与实现提供一种高效、快捷的方法。 相似文献
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全球范围内专利钓饵的大量出现及其经营合法化为企业敲响了警钟。在梳理相关文献的基础上,探讨了专利钓饵的分布特点,揭示了专利钓饵的诉讼战略,并指出近期专利钓饵的发展呈现出公司规模大型化、钓饵业务专利池化以及经营方式协作化的三大新趋势,旨在为我国企业避免专利钓饵的诉讼风险、应对诉讼袭击提供有针对性的对策和建议。 相似文献
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UML是一种基于面向对象的可视化建模语言。本文简要介绍了UML的建模机制并将电梯管理系统作为实例,运用UML语言的图形表达方式,从需求分析到详细设计,及类与类之间的消息传递关系,给出了该方法的应用细节,探索了基于UML的应用领域的系统开发及UML各图形之间的内在联系,说明了应用UML语言丰富的可视化表达元素,可以清晰、快速地定义面向对象的软件系统模型。 相似文献
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针对计算机网络相关课程理论教学抽象,实践教学投入较大且难以实现的现象,提出在计算机网络教学中利用OPNET设计仿真实例,通过建模仿真、分析结果、网络评估、测试优化等过程使理论教学更好地与实践相结合,从而提高网络课程的教学效果. 相似文献
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虚拟仿真技术可以模拟现实世界的真实系统,学生可以进行机械设计、零部件建模与整体装配、艺术设计与建筑设计,可以虚拟特殊领域的实验,如化工爆破、电力系统的极限运行状态等现实难于进行的实验操作,有助于培养学生的创新实践能力,同时具有成本低、效率高、安全性好的特点。 相似文献
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Improving how knowledge is leveraged in organizations for improved business performance is today considered as a major organizational change. Knowledge management (KM) projects are stigmatized as demanding, fuzzy and complex, with questionable outcomes—more than 70% of them do not deliver what they promised. A case of Samsung Electronics mobile branch we present shows how KM projects can be more successful if they are treated as business process-oriented organizational change projects. Both organizations and academia can stand on the shoulders of giants as previous experience and research in that area is rich. Adding the KM flavor to such organizational change is the goal of this case study; the learning outcomes include a six-step KM solution design method, a justification for the business process level of analysis and managerial action, and the need for modest and just-do-it approach when introducing KM-related organizational interventions. 相似文献
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本文以天嵌公司生产的TQ2440开发板为硬件平台,运用VC++6.0开发工具,创建网络服务终端,使得用户可以通过该终端远程操控家中的网络电器。本文对系统的功能、系统的硬件设计、软件设计以及WinCE操作系统、GoAhead服务器等进行了介绍,本系统具有很高的应用价值,值得推广。 相似文献
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随着计算机应用技术和计算机网络技术的迅速发展,将信息技术融入业务中,可以极大的提高货运转运商业务的效率。本文简要介绍一个基于ADO.NET的分布式货运转运系统的分析、设计与实现的过程。 相似文献