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以河南省18个地市为研究对象,根据2006年～2018年统计年鉴数据对农业绿色生产率进行评价和相关影响因素分析,结果表明:河南省农业绿色生产率整体水平有所上升,但仍处于相对低效率状态;农林水事务支出、产业结构、城乡收入比、农业固定资产投资4个指标与农业绿色生产率呈正相关关系,且具有一定的促进作用。农村居民人均可支配收入与河南省农业绿色生产率呈负相关,抑制了农业绿色生产率的提升。结合所得结论,从绿色农业生产观念和绿色生产力区域规划两个方面提出建议,以促进河南省农业绿色发展水平的提升。 相似文献
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为挖掘区域电能替代潜力,以区域生产总值、人口数量、煤炭等能源消耗量等作为潜力评价指标,构建区域电能替代潜力模型,对区域电能替代潜力进行排名分析;建立区域多情景电能替代潜力分析模型,通过GM灰色预测与神经网络组合模型对能源消耗量进行预测,实现多种情景下电能替代潜力预测分析。以河北省为例,对下辖各市区电能替代潜力进行排名,并对河北省多情景下电能替代潜力电量进行预测,最后根据预测结果,提出促进电能替代发展的建议。 相似文献
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探索基于能源转型相关理论框架构建评价指标，从宏观上量化研究中国能源绿色消费水平的时空特征。以中国30个省份为研究对象，从“社会—技术”系统转型视角构建包含7个维度共20个具体指标的中国能源绿色消费水平综合评价指标体系，利用其2006－2019年相关面板数据，采用熵权TOPSIS法、空间计量模型从时空双维度对其能源绿色消费水平演化特征及驱动因素进行实证分析。结果表明：（1）区域能源绿色消费水平呈波动、稳升、速升3阶段的螺旋攀升趋势，具有明显马太效应，呈“东高西低”的集聚发展态势。（2）在影响区域能源绿色消费水平的7类驱动因素中，低碳产业结构、能源新基建、科学技术发展、环境规制、城镇化、城市绿化具有正向空间直接效应，高碳能源消费结构具有负向空间直接效应；科学技术发展、城镇化具有正向空间间接效应，低碳产业结构、能源新基建具有负向空间间接效应，其余因素的空间间接效应不明显。因此，应注意加强区域间科学技术合作、深化生态文明与可持续发展理念，推动中国能源绿色消费水平稳步上升。 相似文献
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文章提出了一种基于AHP-TOPSIS方法的辽宁省能源绿色发展评价方法。借鉴已有研究成果构建包括能源结构、能源效率、经济社会和生态环境4个一级指标及11个二级指标的省域能源绿色发展水平评价指标体系，运用AHP-TOPSIS方法对2012—2021年辽宁省能源绿色发展水平进行评价。结果表明：能源结构对辽宁省绿色能源发展影响最大、能源效率次之、生态环境影响最小，二级指标单位GDP能耗影响最大；辽宁省绿色能源发展水平总体呈上升趋势。通过实证验证了评价指标体系及方法的可行性和科学有效性。 相似文献
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文章从社会、经济、资源环境三个层面构建评价指标体系,使用熵值法和加权法对2013年至2017年的北流市进行土地可持续利用评价,采用障碍度模型寻找北流市土地可持续利用的影响因素.通过研究发现2013年至2017年北流市土地可持续利用水平逐年上升,但土地可持续利用的资源环境协调性评价分值出现波动较大;北流市土地可持续利用发展状况良好,土地可持续利用程度整体呈上升趋势,资源环境协调性上存在阻碍土地可持续利用发展的影响因素,但有很大提升的空间. 相似文献
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提高碳生产率成为实现二氧化碳减排与经济可持续增长双赢目标的重要途径。本文将能源和人力资本引入C-D生产函数推导碳生产率决定方程,使用省级面板数据检验清洁能源使用与要素配置结构的碳生产率效应。结果显示:在全国层面,清洁能源使用对于碳生产率的改善效应业已显现,且在清洁能源发展不同水平地区存在不容忽视的差异;要素配置结构是影响碳生产率的重要因素,资本-能源比和劳动-能源比的提高将有利于碳生产率增长,近年来中国劳动-能源比持续下降对碳生产率造成的不利影响需引起重视;教育水平提升促进了碳生产率增长,但其贡献程度较小;"干中学"并未如理论预期对碳生产率增长产生正向影响。本文研究意味着逐步扩大清洁能源使用规模、审慎调控要素配置结构是保证碳生产率持续增长的重要手段。 相似文献
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技术进步是影响节能降耗与CO2减排的重要因素,是推动中国工业绿色低碳转型的主动力。本文在同时考虑能耗与排放因素基础上,通过数理方程演绎了技术进步有效促进节能减排的理论机理,并运用非参数SML模型测算了1994~2014年中国工业35个行业基于绿色增长的技术进步水平,运用面板模型分别对高低能耗与排放分组的能耗强度和CO2排放强度进行回归,探究不同类型的技术进步对降低能耗与CO2减排的绩效。研究结果显示：生产前沿的科技创新是推动中国工业绿色全要素生产率提高的主动力,前沿科技创新的节能降耗绩效最高,纯技术效率的CO2减排绩效最高;技术进步的节能降耗与CO2减排效应存在非对称性,技术进步的CO2减排绩效大于节能降耗绩效;能源消费结构调整的CO2减排绩效大于节能降耗绩效,解释了存在“高能耗低排放和高排放低能耗行业”之谜。 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献
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Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
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Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
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Prof. SUN Changpu from the CAS Institute of Theoretical Physics coworkers from University of Basel in Switzerland have worked out a way - at least in theory - to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams is similar to the famous Stern-Gerlach effect whereby a beam of atoms passing through a magnetic field is split in two according to the atoms' spin states 《中国科学院院刊(英文版)》2008,22(1):23-23
Prof. SUN Changpu from the CAS Institute of Theoretical Physics and coworkers from University of Basel in Switzerland have worked out a way --at least in theory --to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams and is similar to the famous Stern-Gerlach effect, whereby a beam of atoms passing through a magnetic field is split in two according to the atoms＇ spin states （Phys. Rev. Lett. 99 130403）. 相似文献