手机智能饭店订餐服务系统

介绍手机智能饭店订餐服务系统的分布式结构、工作流程和界面设计.     

基于SPL技术的工业数据库应用系统开发

基于智能持久层(SmartPersistenceLayer,SPL)技术对工业数据库应用系统进行操作,隐藏了SQL语言的实现细节,实现与后台数据库系统的无关性,找到了一条快速、可靠的.Net数据库应用系统开发的有效途径。其遵循O/RMap映射理论实现SQL语句的数据库操作封装,是开发者可以集中于数据库应用系统的业务逻辑层,而不必关注后台数据库的特性及其操作,简化了系统开发,提高开发效率。     

基于XML的智能CAPP开发

智能CAPP是当前学术界研究的焦点。文章在需求分析的基础上提出结合XML和智能文挡技术,开发智能CAPP系统。给出了系统的体系结构,并详细介绍了系统开发过程。     

基于Smart Core的无人机故障诊断系统设技与实现

设计了基于SmartCore的无人机故障诊断系统,给出了系统的硬件及软件组成,可以有效实现系统的故障诊断.该系统可方便实现对无人机现场故障的检测和诊断,具有良好的使用性能和价值,具有良好的通用性和扩展性.     

形状记忆合金驱动梁的变形分析及试验研究

将预拉伸的形状记忆合金 (Shapememoryalloy ,简称SMA)薄片作为驱动器 ,粘贴在构件表面。加热SMA ,当其发生相变时 ,会产生很大的恢复力 ,驱动构件发生变形。建立了粘有SMA薄条应变驱动器的简化机翼—梁的力学模型 ,分析了单边粘贴SMA梁的压弯复合变形 ,给出了其应变分布及弯曲变形的解析表达式。同时通过试验对理论结果进行了验证。     

生活质量与现代居住环境

预制城镇住宅系统包含了先进的技术和标准。它以经过验证符合现场施工要求的建筑构件为基础。这些构件一般是在可监控环境下预制的。然后运送到预订的现场。预制城镇住宅系统还有以下优点：建设周期短,质量更加优异,重量轻,受环境因素干扰小,施工安全,劳动力和设备要求小,为了满足不断扩大的需求,城镇住宅考虑到简单化和模数化的设计,可以有一整套灵活的建筑外形,在满足国际最高标准的同时,它还可以为本地提供质量培训的潜力。城镇住宅是一个智能化的住宅,拥有计算机化的建筑控制管理系统。通过与信息产业和钢铁工业等相关产业合作,它保持着与最新的发展同步,城市住宅系统具有零缺陷质量,它的发展是符合生态和环保要求的。     

NDT of shape adaptive structures

Health monitoring of smart structures is important for maintaining their performance. Damage may be caused by electrical or mechanical overload, or by ageing. We indicate methods that allow the detection and characterisation of defects in a non-destructive way: impedance spectroscopy, dynamic thermography and interferometry. Examples are shown for a model sample and an industrial structure.     

Opportunities and challenges in science and technology of WO3 for electrochromic and related applications

Since the discovery of the electrochromic (EC) effect in transition metal oxides in the mid-1960s, intense research and development work spanning four decades has led to many exciting developments in the science and technology of this class of materials. Tungsten oxide (WO₃) has emerged as one of the key materials, not only for EC devices, but also for many other related applications. After many years of technology development efforts, WO₃-based EC “smart windows” have finally emerged as a viable commercial product. In spite of enormous progress being made on the structural, electrical, and optical properties of amorphous and crystalline WO₃, a detailed understanding of the EC effect in this material still remains somewhat qualitative. Although theoretical models based on intervalence charge transfer and polaron formation have been widely accepted, these models are still unable to explain some of the experimental results on the coloration phenomena. The coloration in WO₃ is a structure-sensitive phenomenon, and excess electrons can be either localized or delocalized. The presence of structural defects such as oxygen vacancies, impurities, and degree of disorder plays a crucial role in determining the coloration efficiency. Although significant progress has been made in recent years on the calculation of electronic structure and defect properties of both amorphous and crystalline WO₃, the structural complexity of the material presents many challenges and opportunities for theoretical computation. The unique ability to induce bistable optical and electrical properties in WO₃ by a variety of excitation sources has led to many devices of significant technological interest. Some of the applications currently being pursued include the photoelectrochemical cell for solar energy conversion and storage; photoelectrochemical splitting of water to generate hydrogen; chemical and biological sensors based on the gasochromic effect; photo- and electrocatalysts for a variety of chemical reactions; demonstration of high-temperature (91 K) superconductivity in WO₃ doped with H, Na, and K; synthesis of a new class of hybrid organic/inorganic (WO₃) materials; and application in ultra-high-resolution electron beam lithography. The emergence of nanostructured WO₃ in recent years will undoubtedly provide new opportunities and significant impact to many of these technologies. This paper presents a brief overview of some of the key research issues the author believes will impact the science and technology of this exciting material.     

智能阀门定位器的设计选型探讨

智能阀门定位器目前已能成功应用,但仍处于一个发展阶段。由于其各种性能指标的意义及表述还不十分清楚,各公司、各产品的功能差别很大,价格差异也较大,使得设计选型产生较多困难。这也是目前智能阀门定位器的应用不像智能变送器那样广泛应用的原因之一,现探讨智能阀门定位器在设计选型过程中出现的一些新问题。     

Motion detection and stochastic resonance in noisy environments

Several motion detection schemes are considered and their responses to noisy signals investigated. The schemes include the Reichardt correlation detector, shunting inhibition and the Horridge template model. These schemes are directionally selective and independent of the direction of change in contrast. They function by using spatial information and comparing it at successive time intervals. A rudimentary noise analysis is performed on the Reichardt and inhibition detectors to compare their natural robustness against noise. Using these detectors, stochastic resonance (SR) is applied, which is characterised by an improvement in response when noise is added to the input signal. It is found that the performance of the detectors degrades with the addition of noise. Employing Stocks' suprathreshold SR, an improvement can be gained when considering a network of detectors. Furthermore, when using an incorrect threshold setting for the template model, SR can be displayed.