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精密卧式加工中心结构件质量分布与优化研究 被引量:2
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作者 马天柱 牛兴华 +2 位作者 石一光 晁冰 张大卫 《机械设计》 CSCD 北大核心 2020年第5期32-36,共5页
精密加工中心结构件的合理质量分布,对于整机动态特性有着显著的影响。为在总体设计阶段主动设计机床结构件质量,文中基于i SIGHT软件搭建了多学科联合仿真平台,综合集成creo的三维参数化建模、ANSYS中APDL(Parametric Design Language... 精密加工中心结构件的合理质量分布,对于整机动态特性有着显著的影响。为在总体设计阶段主动设计机床结构件质量,文中基于i SIGHT软件搭建了多学科联合仿真平台,综合集成creo的三维参数化建模、ANSYS中APDL(Parametric Design Language)的有限元参数化建模;利用试验设计(Design of Experiment,DOE)、响应面模型法和多目标遗传算法的优化分析过程;以整机动态特性最高为目标得到的最优解集为依据,分析总结出结构件最佳质量比。以某框中框结构机床为例,基于上述研究的结论调整结构件质量;结果表明:调整整机结构件质量分布后,整机1~5阶固有频率分别提高12.6%,4.8%,6.1%,0.9%,2.4%。 展开更多
关键词 精密加工中心 ISIGHT 响应面模型 结构件质量
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Software Architecture and Prototype for Supporting Medical Prescription Adherence Using SMS Services
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作者 Abdel Ejnioui Mathieu Morjaret Carlos E. Otero 《Computer Technology and Application》 2012年第9期616-623,共8页
Barriers to medication adherence among patients have been shown to have significant impact on service quality and cost in the healthcare system. To minimize this impact, many in the healthcare industry are highly inte... Barriers to medication adherence among patients have been shown to have significant impact on service quality and cost in the healthcare system. To minimize this impact, many in the healthcare industry are highly interested in supporting prescription adherence among patients. They believe that information technology in general, and mobile technology in particular, can help in developing medical practices that can be highly conducive to high rates of prescription adherence by enhancing communication between patients and healthcare providers. To this end, a number of pharmacy management benefit companies plan to adopt SMS (Short Message Service) communication to reach their customers given the wider acceptance of SMS messaging among mobile phone users. However, most of these pharmacies are reluctant to purchase service agreements from SMS aggregators without a complete understanding of user, service and business requirements related to SMS messaging. Hence, many are in dire needs for prototypes of SMS servers that can help them define and refine these requirements before committing to costly agreements with SMS aggregators. This paper describes such a prototype for a pharmacy benefit management company located in the southeast of the United States. 展开更多
关键词 Mobile technology prescription adherence short message service SMS (short message service) aggregator pharmacyservices.
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Study on the Injection Molding and Optimization of Radiator Cap based on CAE Technology
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作者 Chang Zhang 《International Journal of Technology Management》 2015年第1期35-37,共3页
In order to improve the radiator cap of the automobile cover forming quality and efficiency, this paper applies the UG software to carry out the design of the injection mold, and use Moldflow software to simulate and ... In order to improve the radiator cap of the automobile cover forming quality and efficiency, this paper applies the UG software to carry out the design of the injection mold, and use Moldflow software to simulate and analyze the position of gate filling, flow, cooling and other aspects of application, to determine the best inject location and optimize die structure design. The research results show that the combination of CAD and CAE technology can effectively improve the mold design quality, shorten die development cycle, and reduce the cost of development. 展开更多
关键词 Injection mould CAD CAE shell plastic parts innovative design
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Increasing Production Efficiency through Casting Quality Improving by Electromagnetic Field Applying
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作者 Marija Mihailovic Aleksandra Pataric Zvonko GuliSija Miroslav Sokic 《Journal of Mechanics Engineering and Automation》 2012年第1期59-62,共4页
The increased production efficiency of heat treatable A1 alloys, as the result of applied electromagnetic field during continuous casting process was investigated. The applied frequency of the electromagnetic field (... The increased production efficiency of heat treatable A1 alloys, as the result of applied electromagnetic field during continuous casting process was investigated. The applied frequency of the electromagnetic field (EMF) during the AI alloys continuous casting was changing from 30 Hz to 50 Hz, while some castings were obtained without the EMF influence. The mechanical characterization of continuous casted AI alloys EN AW 2007 and En AW 2024 was done on testing machine Zwick/Roell Z 100. The microstructure of as-cast samples was examined, as well. When the frequency decreases (from 50 Hz to 30 Hz), the grain size decreases as well, what is noticeable through the finer microstructure and its uniformity throughout the cross-section. These results have shown that low frequency electromagnetic field significantly influenced the microstructure and therefore the mechanical properties of as cast ingots. Thus, through improved castings quality, operation time and energy savings, the production efficiency was increased. 展开更多
关键词 AI alloys electromagnetic field CASTING production efficiency.
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Impact of cooling condition on the crystal structure and surface quality of preferred c-axis-oriented AlN films for SAW devices 被引量:2
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作者 张庚宇 杨保和 +2 位作者 赵健 李翠平 李明吉 《Optoelectronics Letters》 EI 2011年第4期273-276,共4页
AlN films with preferred c-axis orientation are deposited on Si substrates using the radio frequency(RF) magnetron sputtering method.The post-processing is carried out under the cooling conditions including high vacuu... AlN films with preferred c-axis orientation are deposited on Si substrates using the radio frequency(RF) magnetron sputtering method.The post-processing is carried out under the cooling conditions including high vacuum,low vacuum under deposition gas ambient and low vacuum under dynamic N2 ambient.Structures and morphologies of the films are analyzed by X-ray diffraction(XRD) and atomic force microscopy(AFM).The hardness and Young's modulus are investigated by the nanoindenter.The experimental results indicate that the(100) and(110) peak intensities decrease in the XRD spectra and the root-mean-square of roughness(Rrms) of the film decreases gradually with the increase of the cooling rate.The maximum values of the hardness and Young modulus are obtained by cooling in low vacuum under deposition gas ambient.The reason for orientation variation of the films is explained from the perspective of the Al-N bond formation. 展开更多
关键词 Acoustic surface wave devices Atomic force microscopy Crystal atomic structure Crystal orientation Elastic moduli ELASTICITY HARDNESS Magnetron sputtering Surface structure VACUUM X ray diffraction
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