用于船舶自动识别系统的机载阵列天线设计

为了满足船舶自动识别系统抗干扰性能的要求,设计了一种机载阵列天线。天线阵列由5个单极子天线单元组成,整体尺寸为Φ720 mm×306 mm,天线单元沿圆周均匀排列。通过泰勒分布和牛顿优化算法,优化阵列的辐射幅度及相位,得到实测的方位面增益-15 dB抑制范围达到128°,-20 dB抑制范围达到77°;装机后-15 dB抑制范围在114°以上,-20 dB抑制范围在51°以上。该阵列天线结构简单,成本低,满足机载环境的使用要求。     

X频段信标机的设计与实现

为满足船载X频段测控设备信道相位修正和伺服性能检查的需要,设计并研制了一款X频段信标机。首先,选用HMC765LP6CE芯片,利用频率合成技术设计了信源并通过通用串行总线（USB）实现了发射频率用户自定义;其次,针对安装平台面积小的限制,基于高频结构仿真器(HFSS)设计了高次模微带天线并完成了仿真分析和指标优化;最后,完成了X频段信标机的工程实现并给出了硬件电路结构和软件程序设计方法。经测试,该信标机锁相效果良好,控制简便,性能可靠,满足用户使用要求。     

Why do public policy-makers ignore marketing and consumer research? A case study of policy-making for alcohol advertising

Public policy-makers have been noted to sometimes ignore marketing/consumer research, even when the policy issue clearly pertains to consumption markets. We embark to identify factors that may explain policy-makers’ limited attention to marketing/consumer research, especially in cases related to consumer affairs that may have public health implications. Empirically, we focus on policy-making around the advertising of alcohol products. Having been involved in this policy-making process in Finland, we elucidate the case through an introspective narrative. We find that the factors explaining policy-makers’ limited attention to marketing/consumer research range from the decision-making characteristics of policy-makers, through inconsistent definitions for key terminology, to the fear of over-generalizing certain theories of marketing/consumer research. Regarding the latter, a key issue in the present case was that public policy-makers were unconvinced about the generic marketing theory stating that in mature markets, advertising will not increase the total consumption demand of a product category.     

E-loyalty driven by website quality: The case of destination marketing organization websites

The capability of website quality management to drive tourism customer e-loyalty is the key factor to achieve superior performance of destination marketing organization (DMO) website operations. The quality management approaches that revolve around website design quality and online relationship quality have drawn intensive attention from e-loyalty researchers in recent years. Thorough empirical investigation, however, still lacks in incorporating the integrative impact generated by the two approaches into DMO website quality management. The current study introduces and validates a theoretical framework based on such impact. As the research result reveals, six facets predict tourism customer e-loyalty directly: informational usefulness, navigational effectiveness, aesthetic appeal, entertainment, social presence, and self-concept congruity embedded in the functional, emotional, and symbolic dimensions of website design quality. Online relationship quality, comprised of relationship satisfaction and relationship trust, plays a partial mediator role in amplifying the e-loyalty driving effect of website design quality in the DMO website context.     

Do the physical facilities in restaurants match older Americans’ preferences?

This study investigated restaurants’ response to the aging population’s preferences. Gaps between previously identified preferences and current restaurant design were examined. The observational survey assessed: parking and outside accessibility, comfort and inside accessibility, menu readability, and restrooms. Occasional gaps were found even though restaurants were generally well-designed. Casual dining restaurants were more likely to meet consumer preferences as to the exterior, seating, and service. Limited-service restaurants better met preferences for the bathrooms, lighting, and sound. This information may be helpful when building or remodeling restaurants and may help restaurants to attract older customers.     

对高校试题库系统软件设计中若干细节问题的研究：以桂林旅游高等专科学校试题库建设为例

试题库系统是一种重要的现代教育技术。试题库系统软件的设计是整个系统的核心,在探讨高校试题库系统软件设计中的若干细节问题的基础上介绍了桂林旅专试题库系统软件在这些方面的设计思路。     

分形图及图案设计

本文讨论了各种分形图及在图案设计中的应用 ,并提出了利用这些分形图生成图案的一些方法。     

复杂海域环境下钢栈桥的设计与验算

沿海路改桥项目施工过程中常规的施工便道及施工平台无法满足桥位处复杂的海域环境要求,而复杂海域环境下钢栈桥结构常年经受大风及波浪冲击作用,结构受力复杂,需要进行特殊设计与验算。本文在已有研究成果的基础上设计了复杂海域环境下钢栈桥搭建方案,考虑钢栈桥在正常使用和台风期停工两种施工情况,采用Midas/Civil建立钢栈桥有限元分析模型,进行了多种典型工况下主要构件应力、钢管桩桩底反力及钢管桩嵌固点的验算。验算结果表明设计的钢栈桥满足项目施工要求,作为临时通道能够有效的解决桥梁的施工作业问题,对复杂海域环境下钢栈桥的设计与验算具有借鉴意义。     

一款移动式仓库上货椅梯的设计及分析

针对目前仓库货物取放工作效率低、劳动强度大且存在安全隐患等问题,本文借鉴传统的椅子及梯子的结构及功能,基于组合创新方法创新设计一种移动式仓库上货椅梯。该装置将椅子和梯子的功能合为一体,移动方便且稳定可靠,成功解决梯子靠在货架上易将货架压倒、椅子的高度不够、稳固性差、梯子及椅子搬运不便、移动性差等问题,提高了仓库取放货物的工作效率,应用推广前景广阔。     

浅谈EPC设计管理中的制度管理

近年来,由于国家政策支撑,“大力推行工程总承包,促进设计、采购、施工等各阶段的深度融合”,建筑行业出现大量EPC总承包工程,其中设计管理作为EPC工程项目管理中必不可缺的一环,与项目建设息息相关。本文主要研究了EPC设计管理制度建设的背景及原因,并对设计管理制度建设中存在的问题进行分析,探讨相应优化措施,提出相关建议。实际项目通过建立完善的设计管理制度后,对于EPC设计管理及项目管理起到了积极的作用,提高了EPC工程总承包项目设计管理水平。