对方案有偏好的TOPSIS供应商选择方法

基于供应链合作伙伴关系的概念,提出供应商选择的常用方法,重点研究了TOPSIS法（逼近于理想解的排序方法）在供应商选择中的应用。文章在传统TOPSIS法的基础上,引入了偏好信息为效用值的概念,从而使权重系数的确定兼顾了主客观因素,使得该方法更具实际使用价值。     

郑州市水资源承载力综合评价

从水资源、经济、社会和生态环境4个方面选取17个指标构建评价指标体系,使用熵权法确定指标权重,运用TOPSIS模型对郑州市2007—2016年的水资源承载力水平进行综合评价。研究结果表明:(1)样本期内,郑州市水资源承载力综合评价值由0. 3336上升到0. 7007,总体呈稳步上升趋势,水资源承载力等级由"差"提升到"较好";(2)各子系统对水资源综合承载力的贡献逐年上升,其中生态环境子系统和经济子系统的贡献最大,社会子系统贡献相对稳定,而水资源子系统则因郑州市水资源时空分布不均,呈波动变化趋势。     

Capturing social network effects in technology adoption: the spatial diffusion of hybrid rice in Bangladesh

In this paper, we demonstrate a method for measuring the effect of spatial interactions on the use of hybrid rice using a unique, nationally representative data set from Bangladesh. In order to circumvent the ‘reflection problem’, we consider an identification and estimation strategy employing a generalised spatial two‐stage least squares procedure with near‐ideal instruments to effectively identify causal influences. Results indicate that neighbour effects are a significant determinant of hybrid rice use. Further, using two specifications of spatial network systems, one based on same‐village membership (irrespective of distance) and the other based on geographical distance (irrespective of village boundary), we demonstrate that a network including nearby hybrid rice adopters is more influential than a network of more distant hybrid rice adopters, and merely having a network with a large number of adopters may be relatively meaningless if they are far away. Furthermore, we show that these network effects are much more important to hybrid cultivation than interactions with agricultural extension officers.     

循环经济下的混合不确定闭环供应链协调控制研究

闭环供应链管理是循环经济极其重要的环节之一。本文根据大系统理论,在正向供应链和逆向供应链的基础上建立了闭环供应链协调控制结构。针对随机参数和模糊参数同时存在的情况,建立了含有混合不确定参数的闭环供应链协调控制模型,为系统研究混合不确定闭环供应链管理提供了新的思路,丰富了不确定规划的研究内容并为供应链管理运作提供了理论参考。     

种植业农户专业化指标体系构建及水平测度*——以张掖市为例

[目的]农业专业化的发展已逐渐成为我国农业生产发展的趋势,而微观农户专业化作为农业专业化发展的首要任务,系统构建其指标体系、量化其发展水平尤为重要。[方法]文章以农业发展较为发达的甘肃省张掖市为研究区域,在获得大量问卷调查数据的基础上,基于组织内部分工、横向分工以及纵向分工视角,从农户家庭内部分工专业化、农产品专业化和生产经营环节专业化3方面构建了现阶段种植业农户专业化评价指标体系,并采用SEM-TOPSIS模型对样本区种植业农户专业化水平进行测度分类。[结果]虽然样本区农户专业化分工水平是低下的,但受农业产业领域分工的影响,绝大多数样本区种植业农户在不同程度存在明显的分工专业化。[结论]当前阶段下,样本区种植业农户专业化发展呈现出农户家庭多种分工形式并存、农产品多样化种植普遍存在以及生产经营社会化服务需求巨大的特征。     

毫米波大规模MIMO系统混合波束成形技术综述

毫米波通信和大规模多输入多输出（Multiple-Input Multiple-Output,MIMO）技术是5G的关键候选技术,在提高5G系统各项性能指标上潜力巨大。混合波束成形作为毫米波大规模MIMO系统中的关键点,能在系统性能和实现复杂度上取得较好平衡,受到业界和学术界广泛关注。首先给出了混合波束成形经典系统模型和常用信道模型,根据信道状态信息获取方式的不同,从基于理想信道条件和基于波束配对两个方面分析和归纳了现有的混合波束成形方案,最后指出了混合波束成形未来发展趋势以及尚未解决的难点。     

国企分类改革下国有出资人模式的重构

分类改革是我国此轮国企改革的核心。要实现分类改革的目标,必须对关乎国企管理体制的国有出资人模式进行重新审视。我国国有出资人模式主要有集权模式和分权模式两种。但无论是以国资委为代表的集权出资模式,还是以行业或地域为标准的分权出资模式,其主要缺陷在于没有回应国企分类改革的要求,没有区分商业类国企与公益类国企而分别构建出资人制度。实际上,在国企分类改革下,有必要确立集权模式与双重模式并行的混合出资人模式。针对商业类国企采国资委集权出资模式,由国资委专司“管资本”,剥离其监管企业的职能;而针对公益类国企采功能双重出资模式,由多个部门分工协作,既“管资本”也“管企业”,实现有效监管的职能。     

Opportunities and risks of combining shopping experience and artistic elements in the same store: a contribution to the magical functions of the point of sale

ABSTRACT

This article draws on the construct of store atmospherics to address one of the latest developments in that field, i.e. the strategy of incorporating artistic elements into the store. On the one side, incorporating artistic elements in store atmospherics constitutes an innovative way for retailers to differentiate their shopping experience. Such a hybrid retail strategy seeks to offer maximised hedonic gratification to store visitors, while adding symbolic value to the commercial offering. Store traffic and sales are thus stimulated. Incorporating artistic elements is also a magic way to conceal the store’s transactional purpose; through this association with the art world, the store is viewed as less mercantile. However, there is a risk that consumers will view the store as a ‘museum’ and visit without purchasing. Therefore we conduce a conceptual investigation of that experiential strategy in order to assess its effects on retailer’s commercial and marketing performance.     

香港新股混合发行方式对我国新股发行实行询价的启示与借鉴

香港的新股发行方式是以累计投标与固定价格相结合的混合发行方式,本文对其发行过程与特点进行了分析。目前,我国股票市场具备了实行询价制的条件,但现在实行的询价制还存在着一些问题,本文对此提出了改进建议。     

Characterisitcs of Exporting and Nonexporting Joint Ventures in Saudi Arabia

The study profiled 83 exporting and onexporting manufacturing joint ventures (JVs) in Saudi Arabia. This represents about one-fourth of all manufacturing JVs in operation at the end of 1987. Stepwise discriminant analysis showed that a set of 9 characteristics representing 4 factors were signficant in differentiating the two groups. Exporting JVs tend to be larger, produce industrial goods in more technology intensive industrial sectors, and be more leveraged than nonexporting JVs. Potential limitations of these findings, and their implications for the policy makers are also discussed.