物流产业系统微观主体的演化机理及稳定性研究

物流产业系统主要由宏观系统因素、微观系统因素、中观系统因素三大系统构成。对复杂经济系统的研究必须从分析个体的行为入手,把个体放在一个相互联系的经济系统中进行研究。因此本文以全新的视角从微观层面运用逻辑斯谛方程分析物流产业系统微观主体的演化机理及发展的稳定性。本文的研究成果对物流产业调整政策的制定具有一定的参考价值。     

Data Mining for Network Intrusion Detection: A Comparison of Alternative Methods*

Intrusion detection systems help network administrators prepare for and deal with network security attacks. These systems collect information from a variety of systems and network sources, and analyze them for signs of intrusion and misuse. A variety of techniques have been employed for analysis ranging from traditional statistical methods to new data mining approaches. In this study the performance of three data mining methods in detecting network intrusion is examined. An experimental design (3times2x2) is created to evaluate the impact of three data mining methods, two data representation formats, and two data proportion schemes on the classification accuracy of intrusion detection systems. The results indicate that data mining methods and data proportion have a significant impact on classification accuracy. Within data mining methods, rough sets provide better accuracy, followed by neural networks and inductive learning. Balanced data proportion performs better than unbalanced data proportion. There are no major differences in performance between binary and integer data representation.     

制度矩范与个体情怀：作为文学空间的宋代词垣

作为文学空间的宋代词垣并存着朝廷制度矩范与文士个体情怀两种语境。以此二者观照词臣生活中四个代表性的面相，即他们的应制之务、值宿吟咏、与词垣之吏的关系以及追仰前朝词臣的文化现象，颇能真切具体地探究词垣文学风貌的内涵。在制度矩范的笼罩下，词垣的应制撰作必须符合上层权力的政治意向；值宿吟咏倾向于规范性地表现侍从宫廷的清贵雅致；词臣与吏员的关系显示出制度的幽微之端对词臣才情的制约；追仰前朝词臣的口径表现为称述前贤黾勉仕位的功绩。在个体情怀的鼓促下，应制撰作能够超轶官场的守常氛围，彰显文章才士以文自赏、嗤哂卿相的风度；值宿吟咏能以村野之趣突破宫廷的审美品位；词臣与吏员的关系反映为扬显词臣个人形象的诗文著述对吏员角色修辞式的驱使运用；追仰前朝词臣的态度表现为称慕前贤退居闲适的诗作，以此慰抚一己之宦场失意的心绪。宋代词垣的文学空间存在着“制度-个性”并峙的态势，词臣侪辈逾越制度矩范彰显个体情怀的气概，应当成为文学研究中一幕值得关注的景观。     

Online leasing problem with price fluctuations and the second-hand transaction

Journal of Combinatorial Optimization - This paper proposes an online leasing problem considering both price fluctuations and the second-hand transaction. In the studied problem, the price of the...     

Eco-friendly container transshipment route scheduling problem with repacking operations

Currently, a huge amount of cargo is transported via containers by liner shipping companies. Under stochastic demand, repacking operations and carbon reduction, which may lead to an increase in effectiveness and environmental improvement, have been rarely considered in previous literature. In this paper, we investigate a container transshipment route scheduling problem with repacking operations under stochastic demand and environmental protection. The problem is a combinatorial optimization problem. Lacking historical data, a chance-constrained programming model is proposed to minimize the total operating and environment-related costs. We choose two distribution-free approaches, i.e., approximation based in Markov’s Inequality and Mixed Integer Second-Order Conic Program to approximate the chance constraints. As the loses induced by unfulfilled demand are not taken into account in the above model, a scenario-based model is developed considering the loses. Risk-neutral model may provide solutions that perform poorly while considering uncertainty. To incorporate decision makers’ perspectives, therefore, we also propose a risk-averse model adopting a risk aversion measure called Conditional Value-at-Risk to meet different preferences. Finally, we conduct computational experiments based on real data to compare the performances of the modeling methods and illustrate the impacts by testing different risk levels and confidence levels.

     

铸牢中华民族共同体意识视域下云南民族同源神话研究

中华民族同为炎黄子孙，某种程度上蕴含着民族同源神话的叙事逻辑。云南的民族同源神话作为区域民族共同体的集体意识，蕴含着平等团结、友爱互助的情感价值。遵循民族共同体结构的建构性与建构的结构性“双重互构”研究进路，分析云南民族同源神话的生成逻辑、叙事特征、结构功能、启示意义，寻绎其内生性、自发性、民间性、微观性因素，在新时代讲好民族团结故事，有助于将中华民族共同体意识铸在牢处，扎在深处，系在实处。     

职工薪酬分配比例、产权性质与企业价值

随着现代企业的发展，职工在企业中扮演的角色越来越重要，职工激励问题对企业的重要性也不言而喻。已有研究主要集中于薪酬和期权等绝对激励，关于职工激励对企业的影响程度的研究则较少。 利用2003年至2013年中国上市公司数据，基于公平理论构建职工薪酬分配比例与企业价值关系的OLS模型，对职工薪酬分配比例对企业价值的影响进行实证检验。 研究结果表明，全样本中职工薪酬分配比例越高，企业价值越低；区分产权性质后，国有企业薪酬分配比例明显高于民营企业，继续提高国有企业薪酬分配比例会降低国有企业价值，民营企业薪酬分配比例仍有提升空间；行业收入较高会弱化提高薪酬分配比例带来的激励作用；劳动密集度会提高薪酬分配比例带来的激励作用；薪酬分配比例显著影响企业价值，产权性质、行业收入差距和劳动密集度影响薪酬分配比例与企业价值的关系。研究结论在用工具变量和外生事件考虑二者的内生性问题后仍然成立。 研究结果丰富了企业价值的影响因素和薪酬契约激励经济后果方面的研究，也为职工薪酬分配比例对企业价值的影响提供了新的经验证据，同时对上市公司制定合理的薪酬激励政策和中国当前提高劳动分配比例的政策具有重要的借鉴意义。建议监管者在制定薪酬管制政策时应根据公司的实际情况(如产权性质和非货币性福利等)对不同的公司进行监管，以促进企业发展。