基于中心核对齐的多核单类支持向量机

多核学习(MKL)方法在分类及回归任务中均取得了优于单核学习方法的性能,但传统的MKL方法均用于处理两类或多类分类问题.为了使MKL方法适用于处理单类分类(OCC)问题,提出了基于中心核对齐(CKA)的单类支持向量机(OCSVM).首先利用CKA计算每个核矩阵的权重,然后将所得权重用作线性组合系数,进而将不同类型的核函...     

Analysis of shrinkage and warpage in an injection-molded part with a thin shell feature using the response surface methodology

This paper presents a systematic methodology to analyze the shrinkage and warpage in an injection-molded part with a thin shell feature during the injection molding process. The systematic experimental design based on the response surface methodology (RSM) is applied to identify the effects of machining parameters on the performance of shrinkage and warpage. The experiment plan adopts the centered central composite design (CCD). The quadratic model of RSM associated sequential approximation optimization (SAO) method is used to find the optimum value of machining parameters. One real case study in the injection molding process of polycarbonate/acrylonitrile butadiene styrene (PC/ABS) cell phone shell has been performed to verify the proposed optimum procedure. The mold temperature (M _T), packing time (P _t), packing pressure (P _P) and cooling time (C _t) in the packing stage are considered as machining parameters. The results of analysis of variance (ANOVA) and conducting confirmation experiments demonstrate that the quadratic models of the shrinkage and warpage are fairly well fitted with the experimental values. The individual influences of all machining parameters on the shrinkage and warpage have been analyzed and predicted by the obtained mathematical models. For the manufacture of PC/ABS cell phone shell, the values of shrinkage and warpage present the reduction of 37.8 and 53.9%, respectively, using this optimal procedure.     

云计算对司法审判的可能性渗透

云计算作为一项新型的信息技术,已逐渐渗透到各个领域,给各个领域带来全新、高效的模式。那么,亦可初步构想将云计算引入司法审判领域进行交叉研究。通过专家请教,实验室模拟等方法,初步探索其可能在司法审判中应用的具体领域为审判管理、远程审判、审判公开等,并进一步探讨了云计算在渗透中可能会遭遇云计算技术高端且多变特性的挑战,面临云计算应用转化的难度攻关以及存在云计算的安全风险隐患等障碍。这需要法学研究者和云计算专家共同齐心合力进一步地深入研究和摸索实践,以达到创新司法审判模式和管理,最大程度地保证司法公正、司法独立、司法公开,进而推进以审判为中心的诉讼制度改革并最终契合法律效果与社会效果的统一这一目标精神。     

RCM技术在天然气净化装置中实施方法初探

理清RCM(Reliability Centered Maintenance)技术的流程及技术实施要点,依托以可靠性为中心的维修技术标准及工程单位经验,结合天然气净化装置的特点列出净化装置典型设备失效模式,依据净化装置现有维护记录提出该技术的实施方案构建,为RCM技术在天然气净化装置上的推广应用奠定了基础。     

计算机辅助RCM分析系统数据库的研究与开发

从装备的RCM分析需求出发,讨论了计算机辅助RCM分析系统的功能及其构成,重点对其中RCM分析数据库系统的功能、组成以及建库过程进行了详细阐述,在此基础上提出了开发RCM分析数据库系统的基本思路。     

一种高精度有心扇形滑移线场的近似解析解

用差分方法对有心扇形滑移线场进行了数值计算,在此基础上,提出了一种高精度有心扇形滑移线场近似解析解。     

A Discussion of Alternative Ways of Modeling and Interpreting Mixture Data

This article presents and compares different models for regression where some of the variables are mixture components. The interpretations of the parameters depend on the model used. It is shown that some of the models are particularly useful for providing information about possible effects. Recommendations and cautions regarding the use of some regression procedures in some standard statistical software packages are given. The methods can be used when the data do not come from an ideal statistical design. The article also discusses how it is possible to find combinations of the variables that will provide output with good predictive properties. An example from the carbon industry with several process variables and two different mixtures is used to illustrate some of the ideas.     

以可靠性为中心的化工机械维修策略研究

石油化工行业对机械设备的完好运行有非常高的要求,而化工机械采用何种维修策略是非常重要的。在介绍三种维修策略的基础上,研究了以可靠性为中心的化工机械维修策略的应用及经济性分析,对于化工企业的机械维修具有指导意义。