A bi-objective decision model and method for the integrated optimization of bus line planning and lane reservation

Journal of Combinatorial Optimization - The increasingly serious traffic congestion makes the bus system more and more inefficient. It is recognized all over the world that designing an attractive...     

Novel distribution-free model and method for stochastic disassembly line balancing with limited distributional information

Journal of Combinatorial Optimization - Recycling of end-of-life (EOL) products has drawn much attention from both researchers and practitioners over the recent decades due to the environmental...     

Capacitated vehicle routing problem on line with unsplittable demands

Journal of Combinatorial Optimization - In this paper we study the capacitated vehicle routing problem. An instance of capacitated vehicle routing problem consists of a set of vertices with demands...     

Online traveling salesman problem with time cost and non-zealous server

Journal of Combinatorial Optimization - Considering that the time of meeting the demands is very important for emergency vehicle and emergency vehicle can’t reject any request, we introduce a...     

Competitive analysis for two-option online leasing problem under sharing economy

With the booming development of sharing economy, decision makers must consider the effect when making decisions with uncertain demands. In the leasing problem, people are faced with several leasing options. Participating in the shared leasing option can reduce the cost of the lessee, which makes it a good choice. This paper considers the online leasing option under sharing economy. By applying competitive analysis to the two-option online leasing problem, the optimal competitive ratios of the deterministic and randomized strategies with market interest rate are obtained, respectively. The theoretical results show that the strategies’ competitive performance is improved under sharing economy. Furthermore, numerical examples are performed to illustrate that considering the shared option has a significant influence on the two-option online leasing problem.

     

跨文化视域下民族高校铸牢大学生中华民族共同体意识路径

跨文化传播促进了不同国家和民族在政治、经济和文化等多个层面的沟通和交流,同时也因传播了不同的价值观和理想信念而对大学生的政治信仰、民族认同、文化认可等方面带来冲击和迷惑。民族高校要重视这些跨文化信息对铸牢大学生中华民族共同体意识的潜在威胁和跨文化教育对培养大学生中华民族共同体意识的积极作用,在外语课堂加强对跨文化信息的解读和鉴别以及对中国优秀传统文化、中华民族团结历史和新中国各行各业建设成就的学习宣讲,以此不断增强大学生中华民族共同体意识,提升他们对外传播中华文化的能力。     

全球价值链嵌入与国际经济周期非对称联动

剔除第三方效应测度双边价值链嵌入度,考察其与国际经济周期非对称联动间关联。研究发现:融入全球价值链使中国制造业陷入低增值率出口与中间投入高比例进口的困境,进而削弱了中国与贸易伙伴国经济扩张的联动,加强了中国与贸易伙伴国经济紧缩的联动,这在一定程度上导致国际经济周期呈扩张联动低于紧缩联动的非对称特征。该现象在金融危机前突出,危机后有所缓解但仍存在。相对而言,融入全球价值链大幅削弱了中国与经济增长较为稳健的发展中国家、非欧盟国家经济扩张的联动,又大幅加强了中国与发达国家、欧盟国家等危机多发国经济紧缩的联动,影响中国经济稳定增长。要规避全球价值链嵌入对稳增长的阻碍,中国须提升制造业出口国内增加值份额,并着力降低中间投入进口比例。本文发现了国际经济周期联动的非对称特征,并基于中国融入全球价值链的典型特征解释成因,研究结论可为制定实施稳增长政策提供决策参考。     

数字经济的统计界定和产业分类研究

当前,数字经济已经成为引领科技革命和产业变革的核心力量,然而国内外尚无统一的数字经济定义和产业分类标准,亟需明确数字经济统计界定,统一产业分类标准,为进一步研究分析提供支撑。首先,本文在系统梳理数字经济狭义和广义定义基础上对数字经济进行了广义界定。其次,将其生产活动归纳为核心活动和应用活动两部分。最后,进一步构建中国数字经济产业分类体系,将数字经济核心活动识别为数字设备制造业、数字产品贸易业、数字技术服务业和数字驱动产业4个大类、19个中类,将数字经济应用活动识别为电子商务产业、数字内容产业、数字金融产业、数字政府产业和 其他数字产业5个大类、24个中类,共计9个大类、43个中类。本文研究成果有望为完善中国数字经济产业分类标准、制定产业政策和定量测算产业规模提供参考。     

农技推广视角下的农户技术需求透视——基于江苏省种植业农户的实证分析

利用江苏省320户种植业农户的调查数据分析农户的技术服务需求,并从农户的视角考察农技推广现状.农户的技术服务需求从需求意愿、需求内容和优先序以及偏好的技术服务供给主体等三个方面进行分析;农技推广现状则从农户解决技术难题的方式、对现有农技服务效果和推广人员的认知和评价以及参加农业技术培训情况等方面分析.研究结果表明:(1)农户有着强烈的技术服务需求,其需求的重点是新品种、栽培管理、病虫害防治和供销信息;(2)农户技术需求与技术供给之间还存在较大差距,现有的农技推广体系尚无法完全满足这些需求.