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法国国家试验研究所(LNE)下属的包装技术研究中心(CETEC)成立于1979年10月,该中心位于巴黎南郊的工业和科研集中区。几年来,工作有了很大的发展。包装技术研究中心的技术活动和业务工作受“技术指导委员会”和由各有关方面的代表组成的“理事会”领导,这个理事会包括:工业包装用户的代表、工业包装制造厂家的代表、公共权力机构的代表(治安部门、法制计量部门、 相似文献
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随着虚拟化技术、分布式存储技术、网格技术和自动化管理技术的发展,云计算已成为IT业发展的必然方向。它的到来已经对人类生产生活产生了影响,将来,它甚至将革命性地改变人类的生活方式。本文首先介绍了云计算的关联概念,其次对云计算的商业模式,计算模式进行了介绍。针对当前的应用现状,对一些实际应用技术结构以及应用意义进行了综合分析,最后对云计算的应用现状与发展前景进行了分析与展望。 相似文献
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多媒体图像技术是多媒体系统中重要组成部分,其中,图像的压缩存储,图像显示和播放,视频交互,图像传输是多媒体系统得以实现和发展的重要基础。借助于开发工具,还可以制作图像产品。 相似文献
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光声显微镜技术具有新兴的一种非侵害性的显微成像技术,具有高分辨率、高对比度、穿透深度高的优点。简要介绍光声成像技术机理,总结报道了国内外几种典型的光声显微成像方法和光声显微图像重建算法的发展历程及其最新进展,指出该技术是一种很有应用前景的医学检测方法。 相似文献
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Sushant Negi Rajesh Kumar Sharma Suresh Dhiman 《Materials and Manufacturing Processes》2015,30(5):644-653
The strength of functional parts is of key importance in additive manufacturing, and the selection of proper parameters is essential to improve manufacturing solutions. Therefore, research is currently focused on determining the influence of process parameters (i.e., part bed temperature, laser power, scan speed, and scan spacing) on the flexural strength of laser-sintered glass-filled polyamide specimens. A response surface methodology-based mathematical model was proposed to predict flexural strength, and the adequacy of the developed model was verified thorough the analysis of variance technique. Further, optimized conditions were established to maximize the output parameter through the desirability function approach. 相似文献
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Injection molding has been found to be an efficient and cost-effective manufacturing technique for the production of a wide variety of parts and components at both macro- and microscale. This is attributed to the application of robust design and process development. However, every manufacturing technique is challenged by quality issues and part defects, but tackled by continuous improvement framework(s). This systematic monitoring and control approach of dimensional accuracy, mechanical properties, and surface quality of the finished part strongly depend on process conditions at different production stage. Therefore, the aim of this study is to review process development of micro-metal injection molding; focusing on critical factors influencing part quality and optimization of process parameters. The critical factors that influenced the finished part quality are part design, mold design, material selection, machine, and process conditions. Optimizing mold temperature, melt temperature, injection speed, injection pressure, cooling time, packing, and holding parameters improve the quality of the molded part. This trend of process development of injection molding gave rise to a broad scope of applications with brighter future potentials for the next decades, particularly for medical and electronics applications. 相似文献
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介绍了一种新型智能空调系统,它增设了短信远程控制所需的短信收发、处理、信息反馈等模块,可以对空调实现远程操作,并通过短信向用户反馈室内温度、空调运行状态等各种信息。该智能空调系统的所有模块都集成在空调内部,并设有方便的人机交互接口。 相似文献
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S. Nagaraju P. Vasantharaja N. Chandrasekhar M. Vasudevan T. Jayakumar 《Materials and Manufacturing Processes》2016,31(3):319-327
Optimization of A-TIG welding process parameters for 9Cr-1Mo steel has been carried out using response surface methodology (RSM) and genetic algorithm (GA). RSM has been used to obtain the design matrix for generating data on the influence of process parameters on the response variables. A second-order response surface model was developed for predicting the response for the set of given input variables. Then, numerical and graphical optimization was performed using RSM to obtain the target depth of penetration (DOP) and heat-affected zone (HAZ) width using desirability approach. Multiple regression models were developed based on the generated data, and then the models were used in GA to determine the optimum process parameters for achieving the target DOP and HAZ width. GA-based models employed two different selection processes. Both the RSM- and GA-based models suggested a number of solutions in terms of process parameters, and the identified solutions were validated by experiments. GA-based model employing tournament selection has been found to be a more accurate method for determining the optimum A-TIG welding process parameters. 相似文献
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一、概述
ISO自发布第一个ISO9000族标准以来,至今已有20多年。在这么长的时间里,作为ISO9000族核心标准之一的ISO9004,在世界范围内一直都没能得到广泛应用。究其原因,一方面存在ISO9000族标准的使用者在认知和功利上的因素,另一方面也不排除ISO9004标准的目的、思路和内容不太适合使用者的因素。因此,TC176正在对ISO9004做重大修订。目前,修订工作已进入到DIS阶段,计划2009年8月正式发布新版ISO9004标准。 相似文献