产品族配置设计的MC-SPA案例检索方法

对产品族配置设计案例推理方法中产品属性不确定引起的问题进行了研究。为同时考虑产品属性的重要性及顾客偏好,定义加权Euclid距离为目标案例与源案例的相似度。用区间数表征产品属性的不确定性,利用蒙特卡洛模拟(Monte Carle Simulation,MC)方法计算点与区间、区间与区间的Euclid距离,得到相似度概率分布的特征值(均值和方差)。再利用集对分析(Set Pair Analysis,SPA)判定产品属性不确定性对案例检索结果的影响,并最终确定满足客户要求的产品族。油锯配置设计实例应用表明,MC-SPA方法组合了MC方法的直观性、计算的精确性及SPA方法处理不确定性问题的优势,案例检索灵敏度高,检索结果稳定可靠。     

基于集对分析的无人机攻势布雷方案优选

为解决无人机攻势布雷方案优选问题,采用基于联系度的逼近理想解的排序法(TOPSIS)进行求解。在传统评估要素基础上提出无人机综合作战系数来衡量布雷平台影响,并利用联系度刻画备选方案与综合理想方案组成的集对在相对接近程度意义下的同一对立程度。根据特征属性值计算信息熵权,并改进相对确定可能势,以实现无人机攻势布雷方案的综合评估和排序,算例验证了该方法的有效性。     

An LCA based indicator for evaluation of alternative energy routes

Politicians and policymakers are searching for alternatives for current energy conversion systems in order to reduce environmental pollution whilst preserving scarce natural resources. When defining new alternatives it is important to find out how environmentally friendly and sustainable these alternatives are, and which of them will ensure a major improvement in environmental issue. To answer such questions the present work proposes a new type of indicator based on exergy life cycle data. Alternative energy routes towards different services and commodities are compared in terms of environmental impact and indirect natural resource costs. Two case studies are presented using data from the Ecoinvent database (v2.01 2007) to compare alternatives to petrol transport and fuel oil power generation. The alternative transport routes assessed were methanol and biogas fueled cars, and wind electricity in the case of power generation.     

一种基于随机混合坐标表示的防功耗分析标量乘法实现方法

提出了一种新的防功耗分析(包括简单和差分功耗分析simpleanddifferentialpoweranalysis)的椭圆曲线标量乘法实现方法,该方法实现简单,并且适合于各种不同有限域上椭圆曲线标量乘法的实现.该方法以模乘和模加减操作为最小调度单位,将标量乘法转换成完全随机的模乘和模加减操作序列;基于随机混合坐标表示实现点的加法和倍加操作,并随机地从点的加法和倍加操作序列中选取后续的模乘和模加减操作;任务调度与模乘和模加减操作的执行是并行的.另外,本文定量分析了该实现方法对于功耗分析的防护能力以及运算性能.     

一种SPA集转化Fuzzy集的新方法

结合SPA集,Vague集及Fuzzy集理论分析,在此基础上提出了一种基于SPA集向Fuzzy集转化的新方法,给出了SPA集转化Fuzzy集的相关准则及证明。通过示例验证了该算法的有效性与合理性。     

基于Node.js多人博客系统的设计与实现

基于Node.js平台,开发一套风格简约、性能优异的多人博客系统。前端技术栈为Vue.js+vue-router+iView,后端技术栈为Koa.js+sequlize+mysql,富文本编辑器采用与Vue深度集成的mavon-editor,路由的切换由vue-router完成,是典型的SPA(single page application)。功能模块包括用户、文章、分类搜索三大模块,用户分为访客、博主、管理员,不同身份的用户对文章具有不同的操作权限,分类搜索模块有助于用户精准地查询感兴趣的文章,节省用户搜索知识的时间。     

正辛醇对苯乙烯膦酸浮选金红石过程的影响

选用苯乙烯膦酸作为枣阳原生金红石矿浮选的捕收剂, 研究了正辛醇对苯乙烯膦酸浮选效果的影响。从苯乙烯膦酸用量、浮选速率、产品粒度范围和泡沫性质等方面进行了系统研究, 结果表明, 在精矿产率相同条件下, 添加500 g/t正辛醇, 苯乙烯膦酸用量从1 400 g/t降到600 g/t, 用量降低了57.1%;且金红石粗精矿品位从8.05%提高到10.36%, 回收率从58.75%提高到76.38%;浮选精矿产品中+0.074 mm粒级和-0.074+0.038 mm粒级含量分别增加了31.3%和40.4%。当苯乙烯膦酸用量一定时, 少量正辛醇能大大提高溶液的起泡性能, 进一步增大用量后起泡性能有所降低, 但是泡沫在一定范围内趋于稳定。     

A factor graph-based iterative detection of faster-than-Nyquist signaling in the presence of phase noise and carrier frequency offset

With the increasing demand for higher spectral efficiency in wireless communications, faster-than-Nyquist (FTN) signaling has been rediscovered to increase transmission rate without expanding signaling bandwidth. Most existing studies focus on low-complexity FTN receiver design by assuming perfect synchronization. In practice, however, phase noise (PHN) and carrier frequency offset (CFO) may degrade the performance of FTN detector significantly. In this paper, we develop iterative FTN detector in the presence of PHN and CFO in a factor graph framework. Wiener process is employed to model the time evolution of nonstationary channel phase. The colored noise imposed by sampling of FTN signaling is approximated by autoregressive model. Based on the factor graph constructed, messages are derived on the two subgraphs, i.e., PHN and CFO estimation subgraph and the FTN symbol detection subgraph. We propose two methods to update the messages between subgraphs, namely, Gaussian approximation via Kullback–Leibler divergence (KLD) minimization and the combined sum-product and variational message passing (SP-VMP), both of which enable low-complexity parametric message passing. The proposed SP-VMP algorithm can provide closed-form expressions for parameters updating. Moreover, conjugate gradient (CG) method is adopted to solve the maximum a posteriori probability (MAP) estimation of CFO with fast convergence speed. Simulation results show the superior performance of the proposed algorithm compared with the existing methods and verify the advantage of FTN signaling compared with the Nyquist counterpart.     

洗浴产品新组分及新技术

介绍了洗浴产品中使用的几种原料。叙述了用于洗浴产品的各种表面活性剂、增稠剂、悬浮剂和稳定剂，以及它们的来源、功能和理化性能。介绍了一些最新的水疗产品、瘦身和塑身产品及其功能。建议开发出一些新的组分和新技术来满足日趋广泛的沐浴要求。     

尺寸链求解的集对分析方法研究与应用

提出了一种基于集对分析理论的尺寸链求解方法。此法将集对分析理论的联系数a＋bi引入误差计算,编制了应用程序。给出了计算实例,得结果与尺寸链的极值求解方法相同。这也证明了应用集对分析的联系数来分析误差和公差是正确的。