Search advertising placement strategy: Exploring the efficacy of the conventional wisdom

Search advertising is one of the most important forms of electronic commerce. While click-through rates are considered a key measure of search advertising effectiveness by search providers, brand attention can also be a valuable objective. Our paper reports on an experiment that investigated how search advertisement placement affected search users’ brand recall and recognition. The results showed that semantically associated search ads generated significantly higher levels of brand attention than contextually associated ones. Significant interaction effects were found among search ad position, keyword association, and search result quality. Implications for decision makers are discussed.     

镀碳纳米管铜岐片微通道冷却器散热性能实验研究

摘要：本文以空气为冷却介质,对镀碳纳米管铜岐片微通道冷却器进行了气冷散热性能实验研究。通过测量微冷却器出入口温度、底面温度与压降,研究了镀碳纳米管铜岐片微冷却器的散热性能。对镀碳纳米管的铜岐片和硅岐片微冷却器,通过实验比较得到,两种材料微冷却器的热阻在低热流密度时,温度变化梯度较大,随着热流密度的提高,热阻变化趋于稳定,并且镀碳纳米管的铜岐片微冷却器散热性优于硅岐片材料微冷却器。     

135MW机组一次调频功能优化

介绍云浮发电厂#4机组一次调频功能的基本原理。通过试验,发现一次调频功能存在问题,经过分析,对控制逻辑和参数进行修改,解决了存在问题,并使DCS侧的一次调频功能与DEH侧的功能很好地配合,在不影响机组稳定运行下完全有能力参与一次调频。     

虚拟实验环境中的实体及其建模

虚拟实验的元器件模型通过用数学模型来代替物理上存在的具体的物理器件,这种数学模型应该能够正确的反映器件的物理特性和电学特性,且便于在计算机上作数值计算。文章分析了虚拟实验环境中的虚拟实体的特性和行为特征,提出了一种虚拟实验的建模分类方法与虚拟元件的建模方法,将元器件的建模分为基于正向操作模型建立和基于逆向操作的模型建立,并通过分析电子实验的特点,探讨了电子实验的元件建模方法和元件的模型的类结构图,建立了电子实验的元件的模型类体系结构,并分析了这种建模方式的特点和优缺点。     

冷喂料胶管生产线的自动控制系统

The current status of colloidal tube production in China and the technique process of the tube prod uction are described in brief． The funct ions and the implementation of the control system, the mathematical model of the PID operation and the block diagram of program are introduced in detail．     

高职院校计算机应用专业实验教学改革

在计算机实验教学过程中精选有趣的实验内容,创造良好的实验环境,建立和谐的师生关系,培养学生的创新意识,提高学生的动手能力,改进教师的指导方法,激发学生的学习兴趣等,是进行高职院校计算机应用专业实验教学改革的有效措施。     

An experiment on the role of graphical elements in architecture visualization

The evolution and maintenance of large-scale software systems requires first an understanding of its architecture before delving into lower-level details. Tools facilitating the architecture comprehension tasks by visualization provide different sets of configurable, graphical elements to present information to their users. We conducted a controlled experiment that exemplifies the critical role of such graphical elements when aiming at understanding the architecture. In our setting, a different configuration of graphical elements had significant influence on program comprehension tasks. In particular, a 63% gain in effectiveness in architectural analysis tasks was achieved simply by changing the configuration of the graphical elements of the same tool. Based on the results, we claim that significant effort should be spent on the configuration of architecture visualization tools and that configurability should be a requirement for such tools.

基于西门子S7—300PLC和PRODAVE数据库的气力输送实验系统

本文介绍基于西门子S7—300PLC和PRODAVE数据链接库的气力输送实验系统。概述了气力输送实验系统工艺及功能要求,着重描述了该气力输送实验控制系统的硬件配置与软件设计。     

“任务驱动”方式与“小组教学”方法相结合的程序设计实验教学

本文根据程序设计课程的特点以及现有的实验教学方法,提出了"任务驱动"方式与"小组教学"方法相结合的实验教学方法,并深入实践和应用。实践教学表明,这种方法能够很好地培养学生的自学能力、合作与创新精神,极大地提高了学生的动手能力,较好的达到了程序设计课程实验教学目的,值得尝试与推广。     

电子管烘干设备结构设计

就某型电子管烘干设备的主要技术特点、结构组成作了阐述,并针对研制过程中所遇到的若干问题进行了探讨。