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21.
Intelligent techniques have been applied in a range of industrial environments [Meziane F, Vadera S, Kobbacy K, Proudlove N. Intelligent systems in manufacturing: current developments and future prospects. Integrated Manuf Syst 2000;11(4):218–38; Stephanopoulos G, Han C. Intelligent systems in process engineering: a review. Comput Chem Eng, 1996;20 (6–7):743–91; Johnston AB, Maguire LP, McGinnity TM. Using business improvement techniques to inform the optimisation of production cycle time: an industrial case study. Proceedings of the IEEE SMC UK-RI Chapter conference 2004 on intelligent cybernetic systems. September 7–8, 2004 ISSN:1744–9189; Proudlove NC, Vadera S, Kobbacy KAH. Intelligent management systems in operations: A review. J Oper Res Soc, 1998;49(7):682–99] although their implementation is not the first choice of many process engineers. In contrast process engineers in a diverse range of manufacturing environments regularly deploy business improvement techniques, such as the six-sigma methodology. Such techniques aim to control and subsequently identify the relationship between the process inputs and outputs so that a process engineer can more accurately predict how the process output shall perform based on the system inputs. Factors such as cost reduction, automatic process control or simply process prediction may be the defining factors in establishing prediction models. 相似文献
22.
G. Thomas McCollough Charles M. Rankin Megan L. Weiner 《Journal of the Society for Information Display》2006,14(1):25-30
Abstract— Roll‐to‐roll methods and equipment to manufacture a bistable, passively driven display media on a flexible substrate have been developed. Using continuous coating techniques and equipment, cholesteric liquid‐crystal droplets in a gelatin binder and a dark layer are simultaneously coated onto laser‐etched‐patterned transparent ITO conductors on a polymeric web. Second conductors are printed with a UV‐curable polymer thick‐film ink over the active display layers, followed by slitting and chopping to complete the manufacture of display media in a full roll‐to‐roll mode. Segmented‐ and matrix‐display media can be generated using these techniques. This paper will focus on the manufacturing considerations for producing matrix‐display media. 相似文献
23.
顾明辉 《艺术与设计.数码设计》2007,(6)
本文探讨了感性与理性和谐结合的当代设计文化语境。文章说明了零缺陷设计理念的提出是当代设计文化的需要,它显示了巨大的创新意义。最后文章指出实现零缺陷设计的根本方法是关注六西格玛,实施六西格玛设计。 相似文献
24.
Hebertt Sira-Ramírez Ciro A. Núñez Nancy Visairo 《International journal of control》2013,86(8):1631-1640
This article describes the design of an observer based robust linear output feedback controller for the regulation and output reference trajectory tracking tasks in switched ‘buck’ converter circuits feeding a completely unknown time-varying load. The state-dependent perturbation effects of the unknown load resistance are on-line estimated by means of a generalised proportional integral (GPI) observer, which represents the dual counterpart of GPI controllers introduced in Fliess, Márquez, Delaleau and Sira-Ramírez (Fliess, M., Márquez, R., Delaleau, E., and Sira-Ramírez, H. (2002), ‘Correcteurs Proportionnels-intégraux Géneralisés’, ESAIM: Control, Optimisation and Calculus of Variations, 7, 23–41). The reconstructed perturbation complements the controller in a cancellation effort which allows the core of the feedback controller to become a traditional proportional derivative (PD) controller. The designed average feedback controller is then implemented via a sigma–delta-modulator, which effectively translates the designed continuous average feedback control input signal into a discrete valued switched input signal driving the converter's input switch and preserving all relevant features of the average design. The Appendix collects some generalities about GPI observers. 相似文献
25.
介绍了长征机械厂采用精益六西格玛方法和工具对椭球底焊接质量问题的研究状况,找出了影响焊接质量的关键因子,针对各关键因子探索了控制措施,在某批产品生产中进行了运用,效果明显。该研究方法具有很好的推广价值。 相似文献
26.
27.
Carmen Abate Dr. Justin Elenewski Mauro Niso Dr. Francesco Berardi Prof. Dr. Nicola Antonio Colabufo Prof. Dr. Amalia Azzariti Dr. Roberto Perrone Prof. Dr. Richard A. Glennon Prof. Dr. 《ChemMedChem》2010,5(2):268-273
Sigma‐2 (σ2) binding sites are an emerging target for anti‐neoplastic agents due to the strong apoptotic effect exhibited by σ2 agonists in vitro and the overexpression of these sites in tumor cells. Nonetheless, no σ2 receptor protein has been identified. Affinity chromatography using the high‐affinity σ2 ligand PB28 and human SK‐N‐SH neuroblastoma cells was previously utilized to identify σ2 ligand binding proteins, specifically histones H1, H2A, H2B, and H3.3a. To rationalize this finding, homology modeling and automated docking studies were employed to probe intermolecular interactions between PB28 and human nucleosomal proteins. These studies predicted interaction of PB28 with the H2A/H2B dimer at a series of sites previously found to be implicated in chromatin compaction and nucleosomal assembly. To experimentally verify this prediction, a competitive binding assay was performed on the reconstituted H2A/H2B dimer using [3H]PB28 as radioligand, and an IC50 value of 0.50 nM was determined for PB28 binding. In addition, [3H]PB28 was found to accumulate with up to a fivefold excess in nuclear fractions over cytosolic fractions of SK‐N‐SH and MCF7 cells, indicating that PB28 is capable of entering the nucleus to interact with histone proteins. In conjunction with computational results, these data suggest that PB28 may exert its cytotoxic effect through direct interaction with nuclear material. 相似文献
28.
原栋文 《石油化工设备技术》2022,(1):5-8
通过化学成分、显微组织、力学性能、断口和能谱分析,对某催化裂化装置S30409翼阀导流锥断裂事故进行原因分析.结果表明:翼阀长期高温运行,基体组织和焊缝中形成了大量σ相;σ相的析出导致材料塑性和韧性下降;装置切换风机运行时,工况波动导致旋风分离系统产生振动,冲击翼阀,使得承受较大应力集中的导流锥焊缝处累积损伤,形成微裂... 相似文献
29.
New sigma point filtering algorithms, including the unscented Kalman filter (UKF) and the divided difference filter (DDF),
are designed to solve the nonlinear filtering problem under the condition of correlated noises. Based on the minimum mean
square error estimation theory, the nonlinear optimal predictive and correction recursive formulas under the hypothesis that
the input noise is correlated with the measurement noise are derived and can be described in a unified framework. Then, UKF
and DDF with correlated noises are proposed on the basis of approximation of the posterior mean and covariance in the unified
framework by using unscented transformation and second order Stirling’s interpolation. The proposed UKF and DDF with correlated
noises break through the limitation that input noise and measurement noise must be assumed to be uncorrelated in standard
UKF and DDF. Two simulation examples show the effectiveness and feasibility of new algorithms for dealing with nonlinear filtering
issue with correlated noises. 相似文献
30.
分析了∑-△对S/N的改善作用,将∑-△在A/D中的应用引入到N-数字小数分频器中,简述了∑-△对N-小数分频器输出相位抖动的改善,提出用单级∑-△累加器级代多级累加器级联复用概念。 相似文献