工业分析与检验技能大赛对《分析化学》课程常规教学的改革

举办工业分析与检验技能大赛宗旨是提高学生操作技能,《分析化学》课程亦是注重化学分析专业学生技能培养。分析技能大赛对《分析化学》课程日常教学的启发,从课程内容、教学手段和方法、技能大赛引入课程、教学评价方式等方面进行课程改革,使二者有机融合。     

新形势下中国天然气营销体系建设探讨

随着我国天然气产业的快速发展,天然气营销体系有待于进一步的调整和完善,在天然气市场快速增长、基础设施开放、营销主体多元化、价格市场化等行业发展的新形势下,亟待建设适应新形势的天然气营销体系,以助推天然气市场化发展迈入新阶段。为此,梳理了我国天然气营销发展历程,分析了天然气营销发展的特点以及存在的问题,探讨了天然气营销体系发展面临的形势:①我国天然气营销体系发展存在着市场缺乏有效的调动机制、营销经营价值没有体现、下游零售环节市场细分尚不充分、上游销售直供困难重重等问题;②面临着天然气市场进入新一轮快速增长期,基础设施开放、营销主体多元化成为必然,价格市场化机制逐步形成等新形势。进而从现有天然气市场营销实际发展的角度出发,提出了在新形势下建设适应市场化的天然气营销体系的发展思路及措施建议:①从以产品为中心向以客户为中心转变,运用现代市场营销理论,基于天然气市场产品、价格、渠道、促销四大市场营销关键要素,构建以营销战略规划、市场价格、销售管理、营销渠道、市场营销信息、客户服务为主的专业化、独立化的营销系统;②将营销行为和客户服务紧密结合,把天然气客户所需融入企业营销过程中,使天然气销售更能适应市场发展需要,促使天然气市场环境更加公平和充满活力。     

Competitive closed-loop supply chain network design under uncertainty

This paper studies the competition between two closed-loop supply chains including manufacturers, retailers and recyclers in an uncertain environment. The competition factors are the retail prices of new products and incentives paid to consumers for taking back the used products. Market demands are price sensitive and also the amount of returned products is sensitive to incentives. The primary goal of this paper is to investigate the impact of simultaneous and Stackelberg competitions between two closed-loop supply chains on their profits, demands and returns. A game theoretic approach which is empowered by possibility theory is applied to obtain the optimal solutions under uncertain condition. Finally the theoretical results are analyzed using sample data inspired by a real industrial case.     

Effects of increased wood energy consumption on global warming potential,primary energy demand and particulate matter emissions on regional level based on the case study area Bavaria (Southeast Germany)

Wood energy use has strongly increased in Europe in the last decade entailing enhanced resource competition between the wood energy sector and the material-based wood sector. We applied the basket of benefit method for the forestry and wood cluster of the study area Bavaria to evaluate the impact of increased wood energy use and decreased material-based wood use on global warming potential, primary energy demand and particulate matter emissions. A baseline and a wood energy scenario were developed until 2035 and wood utilization in both scenarios was assessed via a Life Cycle Assessment of prevalent wood products, imported timber and conventional alternatives of use. The study reveals that, according to the modelled scenarios and the average substitution factors used, a demand shift towards more wood energy leads to a minor increase in global warming potential and to a reduction in primary energy demand. Increase in particulate matter emissions from wood energy use is strong, but definite conclusions cannot be drawn due to lack in data for material-based wood use. Moreover, the study results vary strongly depending on the products used for the comparative analysis. Through our approach, the ecological impact of increased wood energy use becomes visible for a whole region, taking into account the effect of a demand shift and of interdependent substitution effects.     

IEC百年起因与创新——竞争与和谐

要做与国际接轨的创新，必须知其然，更需知其所以然。     

Using social power and influence to mobilise the supply chain into knowledge sharing: A case in insurance

The paper explores the antecedent effects of social influences arising from buyer power and supplier competition on knowledge sharing behaviours within a horizontal supply chain. A 2-year long empirical study examining web posts from a dedicated social supplier platform (SSN), together with interview and ‘conversational’ data over a similar time period was conducted within insurance claims. The findings show social power and influence play a powerful role in supporting knowledge sharing even in typically competitive supply chains where information and knowledge exchange is usually guarded.     

Competition matters! Self-efficacy,effort, and performance in crowdsourcing teams

Advances in information technologies (IT) have enabled organizations to seek solutions for their business problems from beyond their own workforce through digital crowdsourcing platforms. In the most common form of crowdsourcing, teams that offer solutions compete for rewards. Thus, a question of interest is whether competition is a key crowdsourcing characteristic that influences how teams allocate their effort and achieve desired performance. Motivated by this question, we investigate how competition moderates the relationship between self-efficacy and effort using comprehensive, time-variant data collected from crowdsourcing teams that completed a project under competitive and non-competitive conditions. Under competitive conditions, self-efficacy shows a positive effect on effort, which in turn, affects performance positively. Whereas, under noncompetitive conditions, self-efficacy has a negative effect on effort and subsequently on performance. Our results also show a recursive relationship between self-efficacy and performance, in which performance subsequently affects self-efficacy positively. Thus, inducing a sense of competition through competitive reward structures and IT-based “gaming elements” helps improve team effort and subsequent performance. We also tested for mediation of team motivation in the self-efficacy and effort relationship, and we found that motivation partially mediates the relationship. Based on our findings, implications for both theory and practice are discussed.     

一种改进的网格多边形online探索算法

针对网格多边形机器人online探索问题,在分析现有成果的基础上,结合SmartDFS算法,并通过扩大机器人视觉范围,使其范围限定在给定的单位网格内。通过区分不同类型的网格,确定遍历的优先级别以设计出不同的探索策略,提出SmartDFS-OPT算法。该算法将网格多边形online探索问题求解算法的竞争比从5/4降低为7/6,达到了理论分析结果的下界,使机器人的online遍历路径长度达到最短,因而是求解该问题的一个最优算法。该算法将有助于那些基于机器人探索未知环境的智能设备的研发与应用。     

多优先级的卫星网络信道分配算法

为了解决终端接入卫星网络的信道分配问题,充分利用卫星网络有限的信道资源,在分析终端级别和业务级别多样性的基础上,加入优先级标识,建立多终端和多业务优先级模型,分析接入满意度与接入阻塞率、链路带宽和链路总时延的关系,建立接入满意度模型,提出信道竞争机制和带宽压缩机制,进而提出基于多终端和多业务优先级的信道分配算法。仿真结果表明,相比传统算法,该算法可以根据不同终端和不同业务级别分配卫星网络的信道资源,提高接入满意度,进而提高信道利用率。     

中国社交网站竞争分析——基于产业组织理论

本文针对中国社交网站的发展现状,基于产业组织理论的SCP范式,对中国社交网站间的竞争状况进行简要的阐述和分析。文章主要考察了中国社交网站的发展概况和市场结构,对社交网站主要的竞争方式及其效果进行了分析,并对社交网站的盈利状况及模式进行了简要的介绍,指出没有明确有效的盈利模式是中国社交网站盈利不佳的重要原因,也是亟待改进之处。