基于信息自动关联技术的界面导航对Web系统可用性的改进     

杨朝君 《现代情报》2009,29(9):55-58

本文利用信息自动关联技术对Web系统界面导航设计中存在的硬编码问题进行了研究,提出了一种支持界面元素的关联信息自动生成的导航驱动的设计方法,通过对Web常见界面导航逻辑的分析,给出了相应的模型和算法,最后以一个食品质量监管系统为例,对用户使用行为进行了统计分析,结果显示与基于菜单驱动方式相比,该方法可以有效地提高系统可用性。  相似文献   

多电机交流调速系统的变频器计算机通讯设计     

丁金林 《苏州市职业大学学报》2009,20(2):15-18

采用基于RS485接口的开放式USS协议,利用PCL833计数卡和PCL812PG卡组成了一个由工控机对西门子变频器进行远程控制的调速系统,利用Borlandc来实现工控机与多台变频器之间的串行通信,从而实现多台交流电机的远程同步调速控制．该系统具有控制灵活、方便、可靠性强等优点,由于USS协议的开放性,使系统具有广泛的实用性．  相似文献   

软件实现单片机串行通讯波特率的自动解调     

夏志军 《科技成果管理与研究》2009,(6):72-73,92

本文以带校验位的数据通讯为例,介绍了一种自动调整波特率的方法。本方法通过软件来实现数据的格式、波特率的匹配。这样即省去设置波特率硬件切换开关的不便,又提高了通讯的效率和通讯的质量,并解决了实际工作中的一些难题。  相似文献   

The effect of government contracting on academic research: Does the source of funding affect scientific output?     

Brent Goldfarb 《Research Policy》2008,37(1):41-58

The growing share of university research funded by industry has sparked concerns that academics will sacrifice traditional scholarly activities to pursue commercial goals. To investigate this concern, I examine the influence of an applied sponsor and consider limitations of the grant funding mechanism. A novel dataset tracks the careers of academic engineers and their relationships with this sponsor. I find that (a) researchers who maintain a relationship with the directed sponsor experience a decrease in publications implying that academics’ careers may be a function of the type of funding received, not only talent; (b) academic merit does not necessarily serve as a funding criterion for sponsors; and (c) citation and publication measures of academic output are often not useful proxies for short-term commercial or social value.  相似文献   

创新战略导向对 R&D/市场动态界面与产品创新绩效相关性的调节作用研究     

张永胜  刘新梅  张若勇 《研究与发展管理》2008,20(2):9-15

产品创新战略导向对动态界面与产品创新绩效相关性具有重要的影响作用．通过问卷调查的方法,运用统计分析软件,揭示了产品创新战略导向对动态R＆D／市场界面管理水平与产品创新绩效相关性的调节作用,实证结果表明,产品创新计划前期的R＆D／市场界面管理水平和后期的界面管理水平对产品创新绩效都有显著的正向促进作用;市场战略导向对于产品创新计划R＆D／市场阶段界面与产品创新绩效的相关性具有较大的影响;而技术战略导向对于产品创新计划R＆D／市场阶段界面与产品创新绩效相关性的调节并不总是有效的．总结了本研究的讨论以及研究的管理学意义．  相似文献   

Keystroke-level analysis to estimate time to process pages in online learning environments     

Olle Bälter  Dawn Zimmaro 《Interactive Learning Environments》2018,26(4):476-485

It is challenging for students to plan their work sessions in online environments, as it is very difficult to make estimates on how much material there is to cover. In order to simplify this estimation, we have extended the Keystroke-level analysis model with individual reading speed of text, figures, and questions. This was used to estimate how long students might take to work through pages in an online learning environment. The estimates from the model were compared to data collected from 902 volunteer students. Despite the huge differences in reported reading speeds between students, the presented model performs reasonably well and could be used to give learners feedback on how long it takes to work through pages in online learning environments. This feedback could be used to support students’ motivation and effort regulation as they work through online course components. Although the model performs reasonably well, we propose giving feedback in the form of intervals to indicate the uncertainty of the estimates.  相似文献   

遥控驾驶压路机PLC控制系统设计          下载免费PDF全文

陈丙三  赖晓彬  晏岱 《福建工程学院学报》2018,(4):326-330

利用PLC控制技术、步进驱动技术对机械操控系统电气化改装,通过控制逻辑分析,设计PLC控制程序。运用人机界面显示压路机控制状态和参数设定,方便操作人员对压路机状态的监视。通过PLC和PC端的无线通信,实现无人驾驶及远程遥控设计。  相似文献   

Brokerage and balance: Creating an effective organizational interface for product modularization in multinational R&D     

Yang Liu  Xingkun Liang  Yongjiang Shi 《Research Policy》2018,47(6):1133-1146

Despite numerous studies on modularity, the modularization processes have received less attention. In the global context, product modularity can be leveraged to satisfy heterogeneous market requirements across countries with low costs. Through a longitudinal case study of HomeTech, we examined how multinational R&D created an effective organizational interface to facilitate recombination of its organizational units, and thus product modularization. We found that three elements of an organizational interface were established through a process composed of three phases in HomeTech R&D: regional concentration, establishing a module pool, and creating architecture leader posts. We also found that the three elements exerted the balancing effect and the brokerage effect so that the organizational interface was effective in facilitating recombination of organizational units. We contribute to the literature through showing how organizational modularity can affect product modularity within a firm. We also reveal the critical role of architecture leaders in product modularization. Finally, we enrich the organizational interface concept by highlighting the combination of elements.  相似文献   

微机备用电源自投装置与PC机串口通讯的实现     

周静 《荆门职业技术学院学报》2005,20(3):33-36

文章以成功开发的微机备用电源自投装置为例,介绍了80C196单片机与PC机之间串行通讯的硬件实现和软件设计,并为VB6．0发送和接收十六进制数据提供了一种可行的方法．实现了PC机对微机备用电源自投装置的参数传递、运行以及实时控制．  相似文献   

一株以原油为碳源的Pseudomonas sp.菌化学趋向性研究     

景贵成  郭尚平  俞理 《中国科学院大学学报》2005,22(2):187-191

从某油田产出水中分离得到一株以原油为碳源的Pseudomonassp.菌(假单孢菌),其化学趋向性运动能力中等,趋向性机理在本文中得以详细描述.在可视化模型实验中可看到微生物向油水界面处的有序运动,而在有效的营养物浓度梯度范围内,化学趋向性运移速度与距油水界面的距离无关,受温度的影响很大.并且在微观仿真模型实验中,可观察到细菌在孔隙壁和油、水三相交界处聚集,并讨论了该现象的形成原因及其对微生物采油的有利作用.  相似文献