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71.
从技术进步、能源结构两个方面,通过VAR模型探究了技术进步、能源结构与能源效率间的关系。结果表明:技术进步、能源结构与能源效率存在稳定的协整关系。利用脉冲响应函数及响应进行了15期的详细刻画,揭示了技术进步对能源效率的冲击效应较大,能源效率受到能源结构的冲击效应较小。研究结果对中国制定碳减排、节能减排政策和气候变化政策的制定等具有一定的参考作用。 相似文献
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74.
正平台商业模式,是指连接多个特定群体,为他们提供互动机制,满足所有群体的需求,并巧妙地从中赢利的商业模式。随着社会的发展,平台型商业、企业层出不穷,在为人们提供各种所需服务的同时,也在悄然影响着管理者关于平台经济如何影响企业甚至行业发展的深刻思索。作为一直活跃在管理变革之路上的CCDI悉地国际(以下简称"CCDI"),正在逐步向一个平台型企业转型。这样的战略选择,需要我们对行业的大环境以及如何搭建好平台型公司进行考量。 相似文献
75.
《中国海洋工程》2013,(6):F0003-F0003
Aims and Scope
Being an international journal, China Ocean Engineering takes as its prime function the integration of new research concepts, equipment, technology, materials and structures and other scientific advances within the field of estuarial, coastal, offshore, and deepwater engineering with particular reference to developments. The Journal is concerned with all engineering aspects involved in the exploration and utilization of ocean resources. Topics regularly covered include research, design and construction of structures (including wharfs, dikes, breakwaters, platforms, mooring systems, etc.), instrumentation/testing (physical model and numerical model), wave dynamics, sedimentation, structural/stress analysis, soil mechanics, and material research. 相似文献
Being an international journal, China Ocean Engineering takes as its prime function the integration of new research concepts, equipment, technology, materials and structures and other scientific advances within the field of estuarial, coastal, offshore, and deepwater engineering with particular reference to developments. The Journal is concerned with all engineering aspects involved in the exploration and utilization of ocean resources. Topics regularly covered include research, design and construction of structures (including wharfs, dikes, breakwaters, platforms, mooring systems, etc.), instrumentation/testing (physical model and numerical model), wave dynamics, sedimentation, structural/stress analysis, soil mechanics, and material research. 相似文献
76.
王迪生 《国土资源导刊(湖南)》2006,3(3):15-16
新中国成立以来,在湖南省委、省政府和国家有关部委的正确领导下,经全省40余支地勘单位的共同努力,湖南省已发现各类矿床(点)6000多处,探获矿产地1500余个,其中大中型矿床200多个。在此基础上,全省兴建了一大批矿山,建设了一些矿业城镇,形成了门类较齐全的工业体系,其中有色金属已成为湖南省三大支柱产业之一。 相似文献
77.
<正>生物质(biomass)是生产生物燃油和日用品的天然可再生资源。用生物质生产燃油和日用品有助于解决粮食、环境、能源等重大问题。遗传育种、生物技术、化学加工、工程技术等领域的技术进步和整合,正在逐步使利用生物质生产燃油和日用品成为可能。其中,最具代表意义的是发酵生物质生产乙 相似文献
78.
Impact of regional development on carbon emission: Empirical evidence across countries 总被引:1,自引:1,他引:0
Global warming is recently an urgent issue worldwide. The increase of carbon emissions induced by human economic activi- ties has become a major driving force behind global climate change. Thus, as a matter of social responsibility, reasonable carbon con- straints should be implemented to ensure environmental security and sustainable development for every country. Based on a summary of studies that examined the relationship between carbon emissions and regional development, this paper shows that human activity-led carbon emission is caused by the combination of several influencing factors, including population size, income level, and technical pro- gress. Thus, a quantitative model derived from IPAT-ImPACT-Kaya series and STIRPAT models was established. Empirical analysis using multivariate nonlinear regression demonstrated that the origins of growing global carbon emission included the increasing influ- encing elasticity of the population size and the declining negative effect of technical progress. Meanwhile, in context of classification of country groups at different income levels, according to the comparison of fluctuating patterns of the influencing elasticity, technical progress was found as the main factor influencing carbon emission levels in high-income countries, and population size might he the controlling factor in middle-income countries. However, for low-income countries, the nonlinear relationship between carbon emission and its influencing factors was not significant, whereas population growth was identified as an important potential driving force in future carbon emissions. This study can therefore provide a reference for the formulation of policies on carbon constraints, especially to de- velop more efficient carbon mitigating policies for countries at different income levels. 相似文献
79.
为了提高光伏太阳能板的太阳能转换效率,设计了一种太阳能板自动寻光转动控制器,此装置通过寻光电路检测太阳光源方向,当产生偏差信号时,经A/D转换电路输入单片机,单片机处理输出相应电信号驱动电机转动,准确地跟踪太阳光线移动.该装置结构简单、成本低廉、跟踪精度高,可用于太阳能发电系统中,能够提高太阳能的利用效率. 相似文献
80.
近年来,我国经济始终在快车道上飞速发展,资源缺口越来越大,因此,地质探矿采矿任务十分艰巨,要想高效率、高质量的完成任务,野外施工技术的提高和创新是提升地质队伍行业竞争优势的手段之一。通过对齐齐哈尔某地质队的调查,1995年以前平均报废的岩心钻探工作量占总工作量的27.34%,钻探成本高、经济效益差。台月效率和小时效率都很低。自2000年以来,通过引进应用先进的岩心钻探设备和钻进工艺,钻孔质量明显提高,一级孔率100%,没有报废的岩心钻孔和钻探工作量,台月效率和小时效率、经济效益显著提高。 相似文献