基于改进TOPSIS法的供应商选择方法

本文在确定供应商选择的指标体系的基础上，以各指标作为评价的目标，建立评价供应商的改进TOPSIS法，求解各指标对应的客观权重，然后利用权重计算各供应商与理想解的距离，根据各供应商与理想解的距离大小确定优劣排序，实现主观信息与客观信息相结合的合理评价，最后结合案例分析证明了评价体系和评价方法的有效性。  

不确定语言环境下基于ULHGA算子的群决策方法

研究属性权重和专家权重为确定的实数,属性值为不确定语言变量的多属性群决策问题.提出了一种新的数据信息集成算子不确定语言混合几何集结(ULHGA)算子,并给出不确定语言环境下基于ULWGM算子和ULHGA算子的一种群决策方法.最后进行实例分析,说明该方法的实用性和有效性.  

信任和感知风险对消费者网络购买意愿的实证研究

网络购物作为一种新的营销渠道,为消费者提供丰富的商品信息和个性化服务,允许消费者随时随地进行购物。但相对我国数量巨大的网民而言,网络购物的使用率还很低。感知风险和信任缺失被认为是阻碍网络购物发展的主要因素。基于感知价值模型,构建了消费者网络购买意愿影响因素的概念模型。并采用线上问卷的方法获得中国网络消费者的调研数据,使用结构方程模型分析了信任、感知风险和感知收益等变量对网络购买态度和意愿的影响,验证了提出的基本假说。同时对比分析有无购物经验的消费者在感知风险、网络购买意愿等方面的差别,研究结果表明,有购物经验的消费者在进行网络购物时比较看重感知收益,而对于潜在的消费者来说,感知风险是影响其购买态度和意愿的重要因素。  

On soft equality

Molodtsov introduced the concept of soft sets, which can be seen as a new mathematical tool for dealing with uncertainty. In this paper, we deal with the algebraic structure of soft sets. The lattice structures of soft sets are constructed. The concept of soft equality is introduced and some related properties are derived. It is proved that soft equality is a congruence relation with respect to some operations and the soft quotient algebra is established.  

BOT项目特许权期和投资规模决策分析

在需求随时间不断增长情况下,建立了BOT项目公司进行投资规模决策和政府进行特许权期决策的模型,求得了项目公司的最优投资规模决策和政府的最优特许权期决策,并对影响双方决策的变量进行了讨论,结果表明项目公司的最优投资规模不是特许权内完全满足市场需求的最大规模,且其投资规模应随特许权期的延长、项目设计寿命的增加和产品价格的上升而扩大。政府应随需求增长系数的增大和项目设计寿命的增加而延长特许权期,随项目产品价格的上升而缩短特许权期,且政府可以通过适当调整自己的保留收益来保证项目的顺利进行。  

区际救援物资中转调度的动态决策模型与算法

考虑灾害救援中灾区对应急物资的持续消耗,研究了区际多品种救援物资的动态中转调度问题.综合考虑各阶段调度费用、运输费用和库存费用总和最小化的救援物资中转调度安排和库存规划,建立了一个区际救援物资中转调度动态决策模型,并设计了一种矩阵编码的协进化遗传算法.最后通过一个算例验证了模型和算法的有效性.  

Quantum-inspired evolutionary algorithms: a survey and empirical study

Quantum-inspired evolutionary algorithms, one of the three main research areas related to the complex interaction between quantum computing and evolutionary algorithms, are receiving renewed attention. A quantum-inspired evolutionary algorithm is a new evolutionary algorithm for a classical computer rather than for quantum mechanical hardware. This paper provides a unified framework and a comprehensive survey of recent work in this rapidly growing field. After introducing of the main concepts behind quantum-inspired evolutionary algorithms, we present the key ideas related to the multitude of quantum-inspired evolutionary algorithms, sketch the differences between them, survey theoretical developments and applications that range from combinatorial optimizations to numerical optimizations, and compare the advantages and limitations of these various methods. Finally, a small comparative study is conducted to evaluate the performances of different types of quantum-inspired evolutionary algorithms and conclusions are drawn about some of the most promising future research developments in this area.  

A new butterfly-shaped attractor of Lorenz-like system

In this letter a new butterfly-shaped chaotic attractor is reported. Some basic dynamical properties, such as Poincare mapping, Lyapunov exponents, fractal dimension, continuous spectrum and chaotic dynamical behaviors of the new chaotic system are studied. Furthermore, we clarify that the chaotic attractors of the system is a compound structure obtained by merging together two simple attractors through a mirror operation.  

格值一阶逻辑系统LF(X)中的广义量词

给出格值一阶逻辑系统LF(X)中广义量词的定义,讨论了带广义量词的不确定性推理的性质,为语言值逻辑推理提供科学的逻辑平台。  

The Self-similar Solution to Some Nonlinear Integro-differential Equations Corresponding to Fractional Order Time Derivative

In this paper we study the self-similar solution to a class of nonlinear integro-differential equations which correspond to fractional order time derivative and interpolate nonlinear heat and wave equation. Using the space-time estimates which were established by Hirata and Miao in [1] we prove the global existence of self-similar solution of Cauchy problem for the nonlinear integro-differential equation in C＊（[0,∞];B^8pp,∞（R^n）.