共查询到20条相似文献,搜索用时 31 毫秒
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Performance Assessment of Run-to-Run EWMA Controllers 总被引:1,自引:0,他引:1
An iterative method is developed to optimize a performance criterion for best achievable performance for discrete integral controllers used in run-to-run control. An analytical expression is derived so that a realistic assessment of the given integral controller is obtained. Using the theoretical equivalence of discrete integral and exponentially weighted moving average (EWMA) controllers, the method is then extended to performance assessment of EWMA controllers. A semiconductor manufacturing example is used to illustrate the utility of the method. 相似文献
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Travaly Y. Mandeep B. Carbonell L. Tokei Z. Van Olmen J. Iacopi F. Van Hove M. Stucchi M. Maex K. 《Semiconductor Manufacturing, IEEE Transactions on》2007,20(3):333-340
Interconnect RC delay, predominantly affected by the effective dielectric constant (k-value) and by the copper resistivity (rhoCu), is an important performance metric for back-end-of-line (BEOL) process assessment. As process technology scales, interpretation of fundamental process-induced RC delay variations becomes a challenge as the relative importance of statistical process-induced fluctuations (variation of critical dimensions during plasma etching of low-k materials, line profiles, thickness nonuniformity, etc.) grows rapidly and begins to show. A more accurate interpretation of experimental data and prediction of future performance trends requires a more realistic assessment that accounts for such statistical fluctuations. In this paper, an inventory of the most common possible sources of statistical process-induced RC delay variations is made, parameterized, and subsequently used to generate a realistic 2-D interconnect model from which, R and C, and thereby RC delay, are computed. For both wire resistivity and RC, response surface models (RSM) are subsequently generated based on the results of a full factorial design-of-experiment analysis with these input parameters. Finally, based on the RSMs, an improved methodology of interconnect performance evaluation is proposed. 相似文献
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本文从案例分析角度入手,剖析了绩效考核中存在的问题,引出绩效考核中全面质量管理的概念,并且从全面的、全过程的、全员参与的、全方法的四全角度出发,论述了提高绩效管理的新思路. 相似文献
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宋顺美 《电子工业专用设备》2014,(5):41-46
再流焊接工艺是电子组装三大工序之一,其工艺的精确性直接决定了产品焊接质量。但由于再流焊接工艺的不可视化,使其成为工艺控制的难点。参考IPC-9853标准可对再流焊设备及工艺进行科学的量化评估,使其透明可视化,有助于工艺优化及控制。 相似文献
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一种互操作协议性能评估方法 总被引:1,自引:0,他引:1
在异构网络环境下。互操作协议对应用系统具有重要意义,互操作协议的性能对应用系统的性能也起着举足轻重的作用.为确定应用系统性能瓶颈,必须评估互操作协议性能.本文提出了一种互操作协议性能评估方法.该方法针对实际应用系统中的互操作协议,提出符合实际的评估指标,对协议性能进行定性分析和定量分析.在定性分析中得出安全性、容错能力、可扩展性等性能指标.在定量分析中,建立仿真实验模型与排队论数学模型相结合的混合模型。得出网络带宽占用、响应时间与吞吐量等性能指标.综合这些指标,我们给出互操作协议性能评估的结果. 相似文献
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Tsou-Chiang Huang 《Communications, IEEE Transactions on》1985,33(7):711-715
This paper presents a general formulation of piecewise linear (PWL) models of voltage transfer functions to characterize channel nonlinearities in satellite digital communication systems. This formulation provides a tractable approach to evaluate the performance of such systems with band-limited PWL limiters, channel blanking, and hardlimiters. The envelope characteristics of the PWL models are derived in terms of breakpoints and slopes of PWL segments. Intermodulation (IM) products, their statistical properties, and the resultant error probability performance of such BPSK systems, subject to CW interference, are numerically illustrated through these PWL models. 相似文献
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《Reliability, IEEE Transactions on》2008,57(4):589-594
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Performance assessment of embedded HW/SW systems built with various types of VLSI components, i.e. heterogeneous multi-processor architectures, is important to help the development of complex real-time applications. To design such a tool, two issues must be solved: the gathering of relevant information simultaneously on several components without disturbing the application behavior, display of the performance results in a way that can be easily interpreted by designers. This paper presents a significant solution for the two above issues. We first describe what the goal for designers is and what kind of applications are concerned. Then we describe the principle of collecting an event trace and the technique to evaluate the selected performance indexes. The monitoring technique, based on a specific ASIC, is non-intrusive and allows our tool to capture real-time event occurrences from software tasks, and even from hardware functions implemented in ASICs. Each event is automatically time-stamped, collected and processed in real-time to evaluate the performance indexes selected by the designer. We also describe the display tool which clearly shows the results to the designer according to different representations. This technique and the associate real-time performance analyzer are integrated in a complete development process based on the MCSE methodology. 相似文献
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结合国家重要专项测试项目对网络的评估要求,从TD-SCDMA网络评估内容与测试方法出发,详细介绍了TD-SCDMA网络所需要评估的内容,以及评估指标的定义。最后,对TD-SCDMA网络指标的量化评估进行了研究分析,结合网络和项目实际情况,选取了若干个关键网络指标,通过加权平均的方法建立网络评估模型。 相似文献
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测量LED用高精度光度探头及其性能评价 总被引:2,自引:2,他引:0
测量LED用高精度光度探头是准确测量和评价LED品质的关键基础测光部件,其性能好坏将直接影响测量和评价结果。文章详细介绍测量LED用高精度光度探头的国内外近况、和其主要性能参数测试方法.并介绍了作者在测量LED用高精度光度探头研究方面的最新进展,讨论了国际最新关于专用于各种LED光源测试的光度探头的评价方法,同时提出了作者的评价公式。 相似文献
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电子战在线效能评估利用电子战平台产生的各类数据作为评估素材,完成各项评估指标计算.评估素材时效性对评估结果有着显著的影响,随着时间的推移,评估素材与实时战况的匹配性也不断降低.基于电子战在线效能评估架构建立了评估素材时效性模型,提出了一种时效性量化方法以及三种评判评估素材处理机制的指标,并且给出了基于上述评判指标的最优时效性评判方法,最后通过仿真对上述方法的性能进行测试以及结果分析. 相似文献
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建立一个以802.11协议为基础的无线Mesh试验网络在实际应用环境中评价无线Mesh网络的性能[1]。试验网包含Mesh路由器和Mesh客户端两部分。Mesh路由器是基于MIPS构架的嵌入式linux硬件开发板为核心做成;Mesh客户端则是由基于x-86体系的笔记本充当的。通过测试网络中源节点和目的节点的传输速率"带宽"来评价Mesh网络的性能,并且通过实时的视频传输来评价网络的稳定性和鲁棒性。 相似文献
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如何开发人力资源,同样是摆在PCB制造业经营管理者面前的战略问题。文章通过探讨企业员工绩效考核的作用、员工绩效考核中的常见问题以及建立PCB制造业员工绩效考核体系的方法,来阐述如何利用对员工绩效实施科学管理这一工具,不断激励员工,达到育才、用才、留才的目的,最终支持企业实现可持续发展。 相似文献
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根据液晶电视显示器的发展现状及CRT电视显示器和液晶电视显示器的成像原理及基本特性,提出能反映液晶电视显示器基本性能的评价要素. 相似文献