长春市水生态系统服务价值核算及其动态变化

运用生态学和经济学方法进行了长春市水生态系统服务价值核算及其动态变化分析。结果表明,2010年长春市水生态系统服务总价值为17.80亿元,其中,资源功能价值(生物生产、水分供给、释放氧气)为10.42亿元,占58.54%;环境功能价值(污染净化、调蓄洪水、固定碳、养分积累、生物多样性保护)为6.55亿元,占36.80%;人文功能价值(旅游、健康)为0.83亿元,占4.66%。与1990年和2000年相比,长春市2010年水生态系统的资源功能价值所占比例升高,环境功能价值所占比例下降,人文功能价值所占比例升高。在城市发展过程中,不仅要科学利用水生态系统资源功能价值,还应进一步重视其环境功能价值和人文功能价值的实现。     

电气直供方法对无绝缘轨道电路影响的测试

因牵引供电对无绝缘轨道电路的影响不能确定,在设计工作中对此进行了研究,以确保无绝缘轨道电路可靠工作。从结果看出,直供方式下钢轨中牵引电流对无绝缘轨道电路干扰的程度,结合敏感度数据,认为无绝缘轨道电路可以可靠工作。     

有线电视光缆传输系统指标的分析与设计

介绍了有线电视网中ＡＭ 光缆干线传输综合指标的分析与设计。由于ＤＦＢ激光器间的非线性有较大差异,故引入了光链路这一参数。当把这一参数引入有线电视光缆干线设计时,可根据有线电视光缆系统不同传输距离、光接点的分配指标和光缆干线传输系统的实际情况,计算光链路损耗,以确定光端设备的选型,从而进一步确定光缆干线传输系统的设计,使得有线电视总系统指标给以保证     

Social Innovation in an Interconnected World: Introduction to the Special Issue

This introduction provides an overview of the special issue and identifies the need for continued work in the area of social innovation, which seeks to create social value and progress and engages multiple stakeholders. Our special issue highlights various levels and stakeholders involved in the process and outcomes of social innovation. While mainstream innovation, which has been traditionally driven by profit maximization motivations, tends to create winners and losers, social innovation that focuses on redistribution of knowledge, discovery, and cocreation changes the key assumptions and logics of the conventional innovation theory. This introduction first briefly outlines current social innovation literature, presents the contributions created in this special issue, and concludes with the identification of three priorities (or needs) for social innovation researchers.     

外国石油公司动态

(2009年11月) 投资与合作 塞尔维亚天然气公司和Gazprom将组建合资公司 塞尔维亚国家天然气公司(Srbijagas)和俄罗斯天然气工业股份公司(Gazprom)将组建一家合资公司来共同建造塞尔维亚境内段的南流管道.Gazprom和Srbijagas将分别拥有合资公司51%和49%的股份.     

Management Guidance Pre‐ and Post‐Restatement

We examine whether the quality of restating firms’ management guidance differs in periods before and after restatement announcements. While characteristics of restating firms and the consequences of restatement have been a central topic in accounting and auditing research, the quality of management guidance around restatements is less well understood. We consider two competing characterizations of the link between management forecast accuracy and bias and restatement (an event that tends to signal poor financial controls): “Forecast–Opportunism Explanation” and “Forecast–Ability Explanation”. Under the Forecast–Opportunism Explanation, pre‐restatement weaknesses in financial controls enable managers to manipulate earnings toward forecasts and to meet or exceed opportunistically biased forecasts, and the post‐restatement strengthening of financial controls constrains opportunistic behavior. Under the Forecast–Ability Explanation, pre‐restatement weaknesses in financial controls impede managers’ ability to issue accurate forecasts, and post‐restatement improvements remove impediments so that the accuracy of forecasts improves; forecast bias remains unaffected. Evidence indicates that before a restatement, restating firms’ forecasts are more accurate and relatively more downwardly biased than control firms’ forecasts. Post‐restatement, restating firms have less accurate and less downwardly biased management guidance. Our overall results are consistent with the Forecast–Opportunism Explanation.     

把脉经济过热

“目前经济运行中存在的主要问题,仍然是固定资产投资增长过快、货币信贷投放过多,特别是结构性矛盾突出,能源资源和环境压力增大。”温家宝总理在2006年6月14日国务院常务工作会议上这样指出。无疑,理解这些顽症的形成机制、进而妥善地加以解决,是经济发展的当务之急。     

我国环保设备制造业产业布局的实证研究——长三角地区的发展对策

我国环保设备制造业存在很大的发展空间,本文主要运用区位商分析法、评价投入和产出相对效率的数据包络分析法（DEA）,结合各地区、城市和企业的市场占有率指标,对我国环保设备制造业的区域分布特征、产业专业化程度、产业效率以及市场绩效方面的现状进行实证,得出我国环保设备制造业的产业分布图,并从区域分工和协作的角度提出长三角地区两省一市环保设备制造业的发展对策。     

新型集体经济的基本理念和改革实践

本文从理论和实际的结合上,对我国发展集体经济的认识与实践进行历史和现实的思考,阐述了以新型集体经济的理念改造传统集体企业,发展多种形式的集体经济,坚持和完善社会主义初级阶段的基本经济制度,推进中国特色社会主义事业发展的理论思路。