简介:Amodifiedsequentiallinearprogrammingalgorithmispresented,whosesubproblemisalwayssolvable,fortheextendedlinearcomplementarityproblem(XLCP),theglobalconvergenceofthealgorithmunderassumptionofX-rowsufficiencyorX-columnmonotonicityisproved.Asaresult,asufficientconditionforexistenceandboundednessofsolutiontotheXLCPareobtained.
简介:摘要:选取P市火车站为研究对象。阐述其布局现状,运用SLP(系统布置设计)方法,分析其物流和非物流关系,得到车站站内各作业单位的综合相互关系表,进行分析得到两种优化布局排布方式,并将该两种布局方式作为遗传算法(GA)的初始种群部分个体,建立客流最低移动成本和作业单位之间相互关系密切程度最高的多目标问题,将多目标问题通过赋予不同权重值转换为单目标函数,并建立目标函数的约束条件,结合带精英策略的遗传算法,使用Matlab软件求解,最终求得布局满意解。通过对比发现,SLP-GA结合所求得的布局满意解,更加满足多目标规划要求,为火车站的布局规划提供更为合理科学的布局方案。
简介:摘要我国经济增长进入新常态,企业为了降低投资提高工业土地的利用率,在满足载荷要求的情况下首选多层工业厂房。但市场上对多层工业厂房的设计未形成一套完整的系统化方法。本文结合多年实际工作经验,对多层厂房和单层厂房的工艺布局上进行深入研究,总结了多层工业厂房工艺布局过程中需考虑的各种因素,将多年工作经验结合SLP(SystemLayoutPlanning)方法提出了多层工业厂房工艺布局的通用方法,并将该方法进行实际应用,取得了较好的效果。
简介:摘要:近年来,随着社区电商发展迅速,电商巨头们开始将赛道聚焦于新零售行业——社区团购。各大电商巨头铺天盖地地抢占市场,社区电商赛道愈发火爆,随之而来的是越来越多的网格仓铺满全国各个城市。经过对其作业布局的调查研究,发现网格仓内的布局问题成为影响物流效率、配送成本、及配送效率等的直接原因。基于此,本文通过以MT优选广州太和仓为例,根据现场的物流量及各功能区的相关性,从物流因素和非物流因素 2 个方面进行了相关性分析,得到了该空间的作业单位相互关系图、作业单位位置相关图等,并采用路线最优的布局原则综合设计了最终的改善方案,通过方案评价得到了较优方案。该较优方案可以改进搬运效率、提高面积利用率及降低配送成本,为MT优选企业带来良好的经济效益与社会效益。
简介:摘要SLP是一种在综合各学科发展的基础上,运用系统工程概念和系统分析方法的极具代表性的系统布置设计理论,采用SLP法进行总平面布置是在收集原始资料的基础上,对各作业单位之间的相互关系做出分析,包括物流关系和非物流关系,经过综合分析得到作业单位相互关系表,绘制出作业单位位置相关图;通过作业单位面积相关图的修正和调整,得到数个可行的布置方案;再采用加权因素对各方案进行评价择优。煤矿工业广场总平面布置设计是一个非常重要的环节,既关系到企业各种资源能否得到合理利用、企业的整体形象以及与环境的适应性,又关系到企业未来的发展,因此,必须科学、合理地进行矿区设施规划与设计。
简介:系统布置设计(SLP)是设施布置与设计的经典方法,在工厂生产系统和服务设施设计中都可以应用,合理的布置方式可以提高服务质量和竞争能力。调研了宿州大润发超市二楼各作业单位间的顾客流,根据顾客流,运用动线型SLP法得出超市各作业单位间的物流关系;再根据各作业单位相互关系的影响因素,确定各作业单位间的非物流相互关系;综合物流和非物流关系,得出各作业单位间的综合相互关系,发现原布置方案存在以下问题:区域分块过多、副通道过多,家庭食品过于分散、相邻区域商品不协调。根据各作业单位间的综合相互关系对原布置方案进行优化,得出新的布置方案:简化区域分块,区域间商品更加协调;充分利用主通道,家庭食品更加集中。
简介:AbstractBackground:Differential diagnosis of active tuberculosis (ATB) and latent tuberculosis infection (LTBI) has been a challenge for clinicians in high TB burden countries. The purpose of this study was to improve the accuracy of differential diagnosis of ATB and LTBI by using fluorescent immunospot (FluoroSpot) assay to detect specific Th1 cell immune responses. The novel mycobacterium tuberculosis (MTB) latency-associated antigens Rv1733c and synthetic long peptides derived from Rv1733c (Rv1733c SLP) were used based on virulence factors early secreting antigen target-6 (ESAT-6) and culture filtrate protein-10 (CFP-10).Methods:Fifty-seven ATB cases, including 20 pathogen-confirmed ATB and 37 clinically diagnosed ATB, and 36 LTBI cases, were enrolled between January and December 2017. FluoroSpot assay was used to detect the interferon γ (IFN-γ) and interleukin 2 (IL-2) secreted by the specific T cells after being stimulated with MTB virulence factors ESAT-6 and CFP-10, MTB latency-associated antigens Rv1733c and Rv1733c SLP. The receiver operating characteristic (ROC) curve was used to define the best cutoff value of latency-associated antigens in the use of differentiating ATB and LTBI. The sensitivity, specificity, predictive value, and likelihood ratio of ESAT-6 and CFP-10-FluoroSpot combined with latency-associated antigen in the differential diagnosis of ATB and LTBI were also calculated.Results:Following the stimulation with Rv1733c and Rv1733c SLP, the frequency of single IL-2-secreting T cells stimulated by Rv1733c SLP had the largest area under the ROC curve, which was 0.766. With a cutoff value of 1 (spot-forming cells [SFCs]/2.5 × 105 peripheral blood mononuclear cells) for frequency, the sensitivity and specificity of distinguishing ATB from LTBI were 72.2% and 73.7%, respectively. ESAT-6 and CFP-10-FluoroSpot detected the frequency and proportion of single IFN-γ-secreting T cells; the sensitivity and specificity of distinguishing ATB from LTBI were 82.5% and 66.7%, respectively. Combined with the frequency of single IL-2-secreting T cells stimulated by Rv1733c SLP on the basis of ESAT-6 and CFP-10-FluoroSpot, the sensitivity and specificity increased to 84.2% and 83.3%, respectively.Conclusion:Rv1733c SLP, combined with ESAT-6 and CFP-10, might be used as a candidate antigen for T cell-based tuberculosis diagnostic tests to differentiate ATB from LTBI.