克服蚕食CDM机制资源租的信息成本问题：碳权交易所的信息功能

在已有研究的基础上,引入信息成本变量,主要分析信息成本加剧CDM机制的失衡的各类市场形态,再提出以＂碳权＂交易所的信息功能克服由于信息成本问题所加剧的失衡问题,防止我国在参与CDM机制过程中,陷入仅被廉价地掠夺低成本减排能力,却忽视发展高可持续性项目的陷阱。     

中西文化起源对比与研究

一种文化的形成与一定的地理环境、气候以及生态环境等自然条件相联系,同时也与一个民族的风俗、习惯、宗教信仰,以及政治、经济等多方面的因素有关。试从自然基础、原始宗教的形成,以及原始政治经济制度的形成三方面对比分析中西文化的起源,为今后研究跨文化交际中的中西文化差异奠定基础。     

论中国在南海U形线内“其他海域”的历史性权利

中国基于重大历史利益对南海U形线内＂附近海域＂和＂相关海域＂外＂其他海域＂主张历史性权利十分必要。重大历史利益带来的比较优势及其合法性、历史性权利模糊性带来的弹性空间和南海其它周边国家权利主张欠合理性带给中国的优势都让此主张较可行。中国在该海域可考虑：在＂搁置争议,共同开发＂前提下,提炼其享有的重大历史利益并整理相关证据;阐明所主张的历史性权利的内涵;适时正式提出历史性权利主张;统一各种维权执法行动。     

论毛泽东早期民主教育思想

毛泽东早期民主教育思想是毛泽东教育思想体系中的一个重要组成部分,是理解和把握毛泽东思想体系核心内容的关键之一.为了理解毛泽东早期民主思想的发展脉络,把握毛泽东早期民主教育思想的实质,通过分析毛泽东早期民主教育思想的内涵和特点来阐述毛泽东早期民主教育思想,对于推动当代青少年的素质教育的发展和教育教学方法意义重大.     

企业管理中的末位淘汰制：法律问题与改进途径

末位淘汰制源于西方企业的管理方式,作为一种绩效管理手段,它可谓毁誉参半。虽然它对于激励员工的作用不容否认,但其在实施过程中往往会违背现行的《劳动合同法》的法律规定。如何在现有《劳动和同法》的框架内改革与完善制度自身,使末位淘汰制兼具合理性与合法性,成为大量专业人士一直探讨的问题。通过采用案例实证法进行了研究,探寻了末位淘汰制度与现行法律相衔接的途径,并通过重新进行制度设计,使得末位淘汰制重新获得生存的空间,发挥其在提高组织绩效上的积极作用。     

Impact of product proliferation on the reverse supply chain

Product variety is one of the most important advantages in highly competitive markets. However, excessive product proliferation's reducing the profit margin has caused increased focus on developing a management method for maximal profit. In a closed-loop supply chain, product proliferation affects the reverse supply chain as well as the forward supply chain. Although increasing the number of product types can better satisfy diverse customer needs, complexity in the product recycling, remanufacturing, and resale processes may erode a firm's overall profits. In this study, we develop a mathematical model for analyzing a capacitated reverse supply chain consisting of a single manufacturer and multiple retailers. We reveal closed-form solutions for the optimal batch size and maximal profit, and discuss managerial insights into how the number of products and other factors can affect both batch size and profit. Finally, we investigate the relationship between product proliferation and the choice of logistics strategy.     

A note on optimal pebbling of hypercubes

A pebbling move consists of removing two pebbles from one vertex and then placing one pebble at an adjacent vertex. If a distribution δ of pebbles lets us move at least one pebble to each vertex by applying pebbling moves repeatedly(if necessary), then δ is called a pebbling of G. The optimal pebbling number f′(G) of G is the minimum number of pebbles used in a pebbling of G. In this paper, we improve the known upper bound for the optimal pebbling number of the hypercubes Q _n . Mainly, we prove for large n, $f'(Q_{n})=O(n^{3/2}(\frac {4}{3})^{n})$ by a probabilistic argument.     

Some results on the target set selection problem

In this paper we consider a fundamental problem in the area of viral marketing, called Target Set Selection problem. We study the problem when the underlying graph is a block-cactus graph, a chordal graph or a Hamming graph. We show that if G is a block-cactus graph, then the Target Set Selection problem can be solved in linear time, which generalizes Chen’s result (Discrete Math. 23:1400–1415, 2009) for trees, and the time complexity is much better than the algorithm in Ben-Zwi et al. (Discrete Optim., 2010) (for bounded treewidth graphs) when restricted to block-cactus graphs. We show that if the underlying graph G is a chordal graph with thresholds θ(v)≤2 for each vertex v in G, then the problem can be solved in linear time. For a Hamming graph G having thresholds θ(v)=2 for each vertex v of G, we precisely determine an optimal target set S for (G,θ). These results partially answer an open problem raised by Dreyer and Roberts (Discrete Appl. Math. 157:1615–1627, 2009).     

"我晒故我在":移动传播时代的青年游客凝视与自我建构

随着视觉技术的发展,旅行摄影成为了游客凝视自然或人文风景区的有形化与具体化实践.通过对20位青年旅行者的深度访谈,发现游客通过将风景转化成照片,使旅游的瞬时体验成为了永恒的收藏,而社交媒体的发展导致了游客凝视的进一步转向.一方面,受访者希望将旅行中的个人体验在社交媒体上分享以形塑关系自我、改善人际关系,并通过良好的线上互动行为进一步激发创作与分享的热情;另一方面,受访者会因为群体压力,通过设置分组等方式来隐藏旅游中的"集体自我".     

CBL结合PBL教学法在儿科本科实习教学中的有效性研究

目的 探究儿科本科实习教学中运用CBL结合PBL教学法的有效性.方法 对2018年3月-2019年10月加入儿科本科实习的学生80名进行调查分析,按照实习批次划分常规教学的一般组与CBL结合PBL教学的联合组,每组学生人员均是40名,研究实习生学习有效性.结果 入科考试成绩中,一般组实习生平均成绩是(76.33±5.02)分、联合组实习生平均成绩是(79.36±2.48)分,P>0.05;出科考试成绩中,一般组实习生平均成绩是(82.48±6.05)分、联合组实习生平均成绩是(89.66±5.11)分,P<0.05;联合组实习生各项满意率数值均大于一般组实习生,P<0.05.结论 CBL结合PBL教学法在儿科本科实习教学中具有较大价值,取得的成效显著优于常规教学模式,因此可在临床医学教学中大力使用和推广CBL结合PBL教学法,提高实习生综合实践能力和职业素养,为医疗事业注入生机与活力.