论太阳能在中国清洁能源之中的前景展望

太阳能是一种清洁能源,在实际应用过程中具有应用效率高、无污染以及存储量大等优点,目前得到了人们的广泛应用。基于此,文章将首先介绍太阳能光伏发电的原理,太阳能光伏发电系统的组成。其次,研究太阳能光伏发电应用现状,其中主要包括缺乏产业统一规划、产业链发展不平衡、自主创新能力不够、缺乏自主知识产权。最后,研究太阳能光伏发电的发展建议,其中主要包括制定统一的产业发展规划、对产业链展开整合、提升自身的自主创新能力、加强技术生产以及完善太阳能光伏发电产业基地建设五方面内容。     

我国太阳能上网电价合理区间初探

太阳能是人类可以利用的最丰富的可持续能源,具有广阔的发展前景。光伏发电则是利用太阳能的主要手段。由于目前光伏发电成本比传统能源的发电成本要高得多,世界各国光伏发电产业的发展都无一例外地离不开政府的补贴。政府对太阳能发电企业进行补贴的主要形式是给发电企业以优惠的上网电价。合理的上网电价是推动我国光伏产业健康发展的关键。确定合理的太阳能上网电价是政府制定太阳能政策的核心内容之一。     

高效光伏逆变器技术

一、技术名称高效光伏逆变器技术。二、技术类别零碳技术。三、所属领域及适用范围电力行业、光伏发电。四、技术应用现状及产业化情况光伏逆变器是整个光伏发电系统中的关键设备,其可靠性、高效性和安全性对整个太阳能光伏发电系统的发电量及运行稳定性有较大影响,成本约占光伏发电系统的10%~13%。目前,我国光伏组件的产能占全球总产能的70%以上,而光伏逆变器产品仅占全球市场的3%左右,占国内市场的50%左右,发展潜力巨大。该技术的转换效率能达98%以上,目前已具备了一定的产业规模,并在超过300 MW的光伏发电系统中得到应用。     

我国光伏发电产业存在的问题及对策建议

太阳能是重要的可再生能源。积极发展光伏发电,既缓解能源供需矛盾、优化能源结构,又有利于产业结构调整。对我国光伏发电产业现状、发展趋势、存在的问题等进行了分析,提出了我国光伏发电产业健康有序发展的对策和措施建议。     

积极应对分布式电源并网

分布式电源发展面临新的形势和挑战 当前,我国光伏发电、天然气多联供发电、资源综合利用发电已进入大规模建设的发展阶段。根据《能源发展“十二五”规划》,2015年,我国将建成1000个天然气分布式电源项目,10个天然气分布式电源示范区;分布式太阳能发电达到1000万千瓦。建成100个以分布式可再生能源应用为主的新能源示范城市。     

光伏发电：可再生能源的生力军

由于化石能源利用受到资源储量、环境保护等方面的制约,可再生能源的开发利用成为世界能源转型的必然趋势。我国2007年出台了《可再生能源中长期发展规划》,并相继制定一系列支持政策,促进了我国可再生能源的迅速发展。太阳能光伏发电相对于其他可再生能源来讲．资源丰富、利用方式多样、发电成本逐渐降低,这些优势将使其逐渐成为可再生能源开发的生力军。     

建筑电气节能技术研究

当今社会能源短缺问题已经成为了各国面临的难题,合理节约能源并且提高能源的利用率是有效解决能源短缺问题的有效途径。建筑电气能耗在建筑能耗中占有很大的比例。建筑电气的节能可以有效的降低建筑能耗,开展建筑电气节能技术研究,对于降低能源消耗和促进我国能源的可持续发展具有重要的意义。文章通过对建筑电气系统各个环节的分析,研究得到了建筑电气系统减少能源消耗,提高能源利用率的方法和措施。通过研究有效的降低了建筑电气的能耗,提高了能源的利用率。     

中国光伏产业发展的技术经济分析

太阳能是最重要的可再生能源,在世界环境与能源危机的背景下,其应用价值凸现.太阳能发电的光伏技术是太阳能应用的重要技术,发展前景巨大,我国光伏产业发展面临着机遇与选择.本文应用技术经济理论与方法.从技术、企业、产业和国家四个层面,对我国光伏产业的发展问题进行了研究,提出了促进我国光伏产业又好、又快发展的对策建议.     

云南建成亚洲最大太阳能电站

<正>装机容量位列亚洲第一的云南昆明石林太阳能光伏并网实验示范电站一期20兆瓦近日正式投产发电,它标志着云南对可再生能源的利用进入了一个新阶段。据介绍,石林太阳能光伏并网实验示范电站于2008年12月开工建设,总装机容量为166兆     

并网光伏电站工种概算分析及控制措施

我国太阳能资源十分丰富,今后光伏发电将在新能源结构中占据重要比例。但目前我国光伏发电成本相对于核电、风电等其他新能源有一定的差距。为了使光伏项目更具市场竞争力,必须严格控制光伏项目建设成本,其中控制工程概算是其前提条件和根本措施。文章对并网陆地光伏电站工程概算进行了分析,同时提出控制措施,为今后降低工程概算提出了一些建议。     

增强Linux系统安全性的措施

L inux系统的安全取决于系统管理员如何来管理它。本文探讨了一系列可以增强安全性的技巧与策略 ,包括 :系统安装原则、BIOS安全、口令安全策略、设计帐户自动注销功能、文件系统和日志安全策略、使用 SSH及 TCP-WRAPPERS,隐藏系统信息、删除所有特殊帐户、关闭控制台程序、限制系统中的 SUID/ SGID程序等。本文最后向 L inux系统管理员提出了一些安全管理方面的建议     

Comparing FTTH access networks based on P2P and PMP fibre topologies

There is an ongoing discussion in the market which Next Generation Access (NGA) architecture best suits future needs and which investment and cost differences exist. The discussion can be subsumed as P2P vs. GPON, which is somewhat misleading as this article reveals. The discussion is driven by the fact that the high capital cost and the long asset life time of fibre mean that the technology choices made today will dominate the opportunities for telecommunication business of all market players, incumbents, competitors, content providers and business and residential users for many years in the future.The paper analyzes the cost and other differences between Fibre-to-the-Home (FTTH) access network architectures and their related different wholesale approaches by using the well-known and understood steady state approach applied in other NGA analyses in the past. In addition to the steady state analysis a dynamic cost evaluation is included taking into account the different investment behaviour of the FTTH architectures over time. The results describe investment and cost differences between architectures, incumbents and wholesale based competitive operators. The analysis has been performed for different geotypes (clusters) of decreasing population density in a representative European settlement structure.     

CIS与现代企业管理美学

概括性介绍了 ＣＩＳ（Ｃｏｒｐｏｒａｔｅ Ｉｄｅｎｔｉｔｙ Ｓｙｓｔｅｍ）的三大基本组成，并阐述了它与现代企业管理密不可分的相互联系及所处的举足轻重的地位，指出导入ＣＩＳ是现代企业谋求发展的重要手段。     

Divergent patterns of engagement in Internet standardization: Japan,Korea and China

This article analyzes the engagement of Japanese, Korean and Chinese participants in the development of Internet standards at IETF on the basis of four quantitative metrics: attendance, patenting, authorship and leadership. The results are strikingly divergent. Japanese involvement in Internet standardization began early and Japan was, for many years, second only to the U.S. in terms of IETF participation. Though Japanese participation has declined since the early 2000s, Japan remains a major contributor to IETF standardization. Korean involvement in IETF has always been significant, but below the levels of Japan and major European countries. Korean participation in IETF has also declined over the past decade, and has been dominated by one firm, Samsung. Though meaningful Chinese involvement in IETF did not begin until the mid-2000s, it has rapidly expanded in recent years. Today, China is a major player in numerous areas of Internet standardization in terms of three metrics (participation, patenting and leadership), and is rapidly gaining in terms of document authorship as well. Most of China׳s recent IETF involvement can be attributed to Huawei, though other Chinese firms have recently begun to increase their participation in the organization. Thus, contrary to some views that China׳s engagement with standardization is primarily one of indigenous innovation and “catching up”, China׳s experience with IETF demonstrates deliberate and effective engagement with a major Western standards-development organization on its own terms.     

快速成形技术的应用及热点分析

基于快速成形技术的原理,展示了快速成形技术在快速模具制造、金属零件直接成形、反求工程等领域的广泛应用,总结了快速成形制造技术研究的热点,即研发新材料和新设备、提高成形精度、建立RPM的反求工程系统、建立成形技术的统一标准和扩大成形技术的应用领域。     

Whose Image is it Anyway?: Some Considerations of the Curricular Importance of Subject Image in Secondary School Design and Technology Education

This paper explores the idea that a sense of school subject image is a necessary feature of curriculum management and a potent force for change. The discussion centres on the view that all school subjects have an image and that if those intimately involved with the subject do not control the image then someone else does! In such circumstances the image is the product of past encounters and old euphemisms and is unlikely to hold the changed realities.The UK developments in Design and Technology education (the term Design and Technology is used to denote the school subject defined under this heading by the UK National Curriculum, 1995) have created something of an image problem which has interesting international parallels. Some of these problems are due to clearly discernible internal tensions and an ambiguous relationship with other subject areas.Through greater attention to subject image internal controversies might be acknowledged and resolved, relationships with other subject areas can be more meaningfully understood and practitioners can be helped to make sense of curriculum change.     

Indigenous peoples’ nutrition transition in a right to food perspective

In indigenous communities the nutrition transition characterized by a rapid westernization of diet and lifestyle is associated with rising prevalence of chronic disease. Field work and literature reviews from two different policy environments, Argentina (Jujuy) and Canada (Nunavut), identified factors that add to indigenous peoples’ disease risk. The analytical framework was the emerging human right to adequate food approach to policies and programmes. Indigenous peoples’ chronic disease risk tends to increase as a result of government policies that infringe on indigenous peoples’ livelihoods and territories, undermining their economic system, values and solidarity networks. Policies intended to increase food security, including food aid, may also fuel the nutrition transition. There is a need to explore further the connection between well-intended policies towards indigenous peoples and the development of chronic diseases, and to broaden the understanding of the role that different forms of discrimination play in the westernization of their lifestyles, values and food habits. Food policies that take due account of indigenous peoples’ human rights, including their right to enjoy their culture, may counteract the growth of chronic disease in these communities.     

Diffusion and usage of public e-services in Europe: An assessment of country level indicators and drivers

We analyze the state of the art of indicators on e-government, e-health, e-procurement and e-participation. We survey the main methodological properties of these indicators, and highlight their heuristic potential. Further, we address empirically the issue of the explanation of the availability scores, i.e. how the supply of the various e-services in each country is affected by political, institutional and socio-economic differences, and is followed by actual usage. The econometric analysis uncovers the importance of broadband penetration and higher education as drivers for most of the types of e-services and users (citizens and businesses). Moreover, a corruption-free and agile public sector proves to be an important pre-condition for more effective supply and usage. Despite data limitations and the complexity of the underlying diffusion phenomena, our study is the first truly longitudinal contribution aimed at disentangling the common drivers of such an important phenomenon – the e-services availability and usage across European countries. As such, this work appears useful to inform the policy debate and practice, in a phase characterized by a prospective reorientation of the public e-services provision and policy agenda.     

一种高精度的频率标准比对系统

频率标准源可以提供精确的标准频率,在测定频率标准源的各项性能指标时,要求测试系统必须具有很高的比对精度。所设计的频率标准比对系统采取多级倍频 混频方式使频率偏差逐级扩大后再测量,从而避免了直接进行高次倍频的困难,提高了测量精度,可以对高精度的频率标准的准确度、长短期频率稳定度进行快速测量,是一种高精度时畴参数测量系统。     

A strategic skill based model of supplier integration and its effect on supply management performance

Supplier integration is a tool to help organizations gain competitive advantage. Strategic supply management skills and the supply management function's perceived status are hypothesized as antecedents to supplier integration leading to supply management performance. The sample for this study includes 152 executive level supply management professionals. The empirical results suggest that strategic skills and perceived status are essential antecedents to supplier integration and subsequent performance. Further, the relationship between strategic skills and performance is mediated by supplier integration. Results of a dominance analysis also suggest which strategic skills are most likely to explain status integration, and performance. These findings have significant implications for supply management theory and practice.