区域物流中VRPTWSDP问题的混合遗传算法

研究了区域物流中带时间窗约束的具有同时集送货需求的车辆路径问题（VRPTWSDP）,给出了VRPTWSDP的混合整数规划模型,设计了求解VRPTWSDP的混合遗传算法（HybridGA,HGA）。算法以最优划分方法计算适应值,邻域搜索法作为变异算子,设计了新颖的交叉算子和群体更新策略,定义了群体多样性结构和变异概率的变化规律。对典型VRPTWSDP实例进行测试的结果表明：HGA算法能较快地获得小规模问题的最优解,并能有效地求解大规模的问题。     

The effect of algorithmic management and workers’ coping behavior: An exploratory qualitative research of Chinese food-delivery platform

While algorithmic management provides new options for organizing service work, it is underexplored in tourism and hospitality research. From food-delivery platforms in China, this qualitative study sources interviews and online reviews to explore the impact of algorithmic management on workers' service behavior and how they cope in response. Our study uncovers an algorithm-human hybrid approach for managing workers, where algorithms and humans function distinctly but complement each other. Algorithmic management influences deliverers’ work either positively, by improving service efficiency, reliability and customer-orientated behavior; or negatively by causing impersonal service behavior, frequent service recovery and extra-role workload. Deliverers employ both problem-focused (i.e., compliance, flexible response and resistance) and emotion-focused (i.e., relief) coping strategies in algorithmic management. In addition to individual resistance, we firstly revealed that deliverers collude with other parties to resist the algorithms. We proposed a conceptual framework that contributes to understanding the dynamic, mutual relationship between algorithms and workers.     

Consumer cynicism: Interdisciplinary hybrid review and research agenda

Over the years, consumers have been questioning the intentions and actions of firms, resulting in a cynical attitude and behaviour. Due to the severity of the outcomes that cynical consumers may display, reputed journals and prolific researchers have addressed the core issue in their own unique ways. However, no single study offers a uniform, comprehensive, and contemporary review of consumer cynicism literature. Thus, we use an interdisciplinary approach to study the literature spanning 47 years (1976–2022) on cynicism in consumer research, psychology, and organizational domains through a hybrid review involving bibliometric and systematic literature reviews. Following the SPAR-4-SLR protocol, this review shows the most cited and co-cited articles, researchers, and keywords in cynicism research. We infer that the consumer cynicism construct draws heavily from the organizational behaviour area, possessing the potential to be correlated with, and extended to interdisciplinary research. Also, we offer an all-inclusive model of the predictors and predictands of consumer cynicism based on the ADO-TCM framework. We close this study with its academic contributions, practical implications, and future research directions using the ADO-TCM framework.     

Expected utility theory on mixture spaces without the completeness axiom

A mixture preorder is a preorder on a mixture space (such as a convex set) that is compatible with the mixing operation. In decision theoretic terms, it satisfies the central expected utility axiom of strong independence. We consider when a mixture preorder has a multi-representation that consists of real-valued, mixture-preserving functions. If it does, it must satisfy the mixture continuity axiom of Herstein and Milnor (1953). Mixture continuity is sufficient for a mixture-preserving multi-representation when the dimension of the mixture space is countable, but not when it is uncountable. Our strongest positive result is that mixture continuity is sufficient in conjunction with a novel axiom we call countable domination, which constrains the order complexity of the mixture preorder in terms of its Archimedean structure. We also consider what happens when the mixture space is given its natural weak topology. Continuity (having closed upper and lower sets) and closedness (having a closed graph) are stronger than mixture continuity. We show that continuity is necessary but not sufficient for a mixture preorder to have a mixture-preserving multi-representation. Closedness is also necessary; we leave it as an open question whether it is sufficient. We end with results concerning the existence of mixture-preserving multi-representations that consist entirely of strictly increasing functions, and a uniqueness result.     

人力资本集聚对城市绿色经济效率的影响分析

提高绿色经济效率是中国经济高质量发展的重要任务。运用DEA-SBM模型测算2003—2017年中国262个城市的绿色经济效率,选取空间杜宾模型实证分析人力资本集聚对绿色经济效率的影响,结果表明,人力资本集聚有利于促进当地城市绿色经济效率,且这种影响存在一定的区域异质性。人力资本集聚对绿色经济效率的促进作用是通过创新能力促进和高质量FDI效应等途径起作用的。为了解决内生性问题,使用各城市地形起伏度作为工具变量,以二阶段最小二乘法进行估计,得到的结果与研究结果保持一致,证明研究结论具有稳健性。     

风光互补发电系统控制技术分析

风光互补发电技术可以将风能和太阳光能这两种应用最为广泛的可再生能源转变成电能,是当前节能减排时代的一个重要能源利用方向和发展方向。在风光互补发电系统控制技术应用的过程中,需要使系统保持在稳定安全的运行状态,提高设备和系统的运行效率与运行质量,从而保证发电系统功能的有效发挥。论文主要针对风光互补发电系统控制技术进行探究。     

功率约束下的星地协作网络中断概率分析

针对星地协作网络,考虑中继节点转发卫星节点信号时会受发射功率和干扰功率约束,提出了一种基于中继节点与目的节点间链路最大信噪比准则来选择中继节点的放大转发部分中继选择策略。在卫星链路遭受阴影莱斯衰落和地面链路遭受瑞利衰落情况下,推导出系统中断概率下界的闭合表达式。仿真结果表明了理论分析的正确性,并展示了不同阴影莱斯信道参数、不同中继数目、不同功率约束对中断概率的影响。     

Of waste facility siting and relational geographies of place: Peri-urban landfills,community resistance and the politics of land control in Ghana

The siting of landfills in peri-urban spaces is seen as both a solution to land scarcity in inner cities and a development opportunity for rural hinterlands. Despite the widespread reliance on landfills for managing urban waste in Ghana, their operation tends to ignite land use conflicts at different scales. However, existing studies on the drivers of these conflicts have mostly failed to situate local resistance within the broader political economy of land control. Drawing on a longstanding landfill conflict in northern Ghana, this contribution shows how under the guise of landfills, the land question in peri-urban spaces is contested. While at face value the landfill struggle appears to be fuelled by the associated poor environmental conditions and health risks of waste from the inner city, our findings reveal the role of diverse incongruities including: (i) the crafty tactics deployed by state institutions in land acquisition for 'public interest', (ii) payment of unrealistic consideration, and (iii) diversion of designated public lands to undeclared uses. Amid these contestations, the notion of territorial belonging by peri-urban communities often runs counter to statutory ordering by the government who hold such hitherto private lands for ‘public interest’. Powerful local actors such as chiefs hide behind community agitations with hopes of controlling land if such contestations materialize. These dynamics have ramifications for the achievement of the New Urban Agenda of Habitat III, which focuses on secondary cities. A sustainable resolution of landfill-related conflicts must therefore begin with addressing the land question in peri-urban spaces.     

Emergent directions for human resource management research in Latin America

Research in this special issue converges around important HRM challenges that will shape the direction of academic research in the future. We argue that the nature of these challenges, such as balancing global and local HRM approaches, focusing on people while aiming at performance and, in general, managing in a hybrid cultural and economic system, requires reframing strategic HR in terms of social contract theories. Such theories consider multiple stakeholders and focus research on the employment relationship as unit of analysis, which fits well with the pre-eminence of person-centred management over merely profit-centred goals. We propose theoretically anchored research to guide strategic HRM practices, taking into account Latin America's culture-specific humanistic approach and its labour market institutions.     

Residential Enclosure,Power and Relationality: Rethinking Sociopolitical Relations in Southeast Asian Cities

As in many other areas around the globe, enclosed residential spaces have proliferated in Southeast Asia since the 1990s. Recent publications have presented such gated communities as ‘porous enclaves', implying multiple socio‐spatial dynamics of movements through gates and walls. However, the enclave model does not suffice for analyzing the relational dynamics generated by enclosed residential estates. The concept of ‘ecotonal space' and social geography are used to show, in the case of Cambodia's capital Phnom Penh, that the enclosure and its borders are producers and products of multiple social, spatial, economic and political relations, both symbolic and material. Property developers assert their position as an emerging elite in the city's society and politics, a process based on different types of everyday relations they have with the inhabitants of their residential estates and territorial institutions. The enclosed residential estate can serve as a resource for deploying new power relations. Consubstantial with the neopatrimonial nature of the Cambodian economy and politics, this process is a response to the opacity and uncertainty of real estate markets and urban development.