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1.
随着国家对于新能源技术开发领域的重视与支持,分布式光伏发电作为一种新能源发电技术,在实际中的应用与研究越来越多。其中,小型(家庭)分布式光伏发电作为分布式光伏发电的一种重要技术形式,虽然研究发展的起步比较晚,但在实际中也有了一定的应用实现。本文将结合国家对于分布式光伏发电推广应用的具体政策支持以及该发电技术自身的推广应用条件等,结合其推广应用现状以及其中存在的问题,对于小型(家庭)分布式光伏发电技术的推广应用方案进行分析论述。 相似文献
2.
针对传统光伏发电系统现场监测方法现场作业工作量大、数据分析难度高等问题,探索高效且高质量的光伏发电系统监测方式,促进实现对光伏发电系统的电智能化管理并保障其运行稳定。依托广州市机电技师学院“源网荷”一体智能光伏实验室电网项目,设计构建光伏发电系统远程监测平台,在平台各功能模块中综合运用物联网、云计算、大数据等现代信息技术,并在平台实践应用中重视相关可能故障的控制和管理研究,以保障平台稳定高效运行。通过设计数据信息传递与数据存储、数据分析处理、可视化数据界面和远程控制功能等模块,实现远程数据采集、智能分析、数据可视化呈现和远程控制等功能,对光伏发电系统进行实时、准确的监测和管理;并针对光伏发电系统中主要常见的通信故障、数据异常和系统故障,提出加强设备的检修和维护工作、使用高质量的自动化设备等管理措施和建议。此外,根据平台监测结果推断,数字化和智能化且高质量的光伏发电系统远程监测平台应用,有助于推动光伏发电产业发展、提高能源利用效率、推动环境保护,并为智慧城市的智能应用和管理提供支持。 相似文献
3.
分布式光伏发电是一种新型的、具有广阔发展前景的新能源综合利用技术。本文从分布式光伏发电系统的现状、设备组成和技术要求等方面,简单阐述了光伏发电技术的应用和发展前景。 相似文献
4.
本文概述了户用光伏电源自动跟踪系统的工作原理、参数设计、样机测试结果和效益分析,表明该系统具有很好的市场发展潜力。 相似文献
5.
为满足社会经济快速发展的需求,逐渐出现更多新型发电方式,在降低资源浪费与环保的情况下实现电力资源的生产。其中太阳能发电已经成为接替传统发电的主要方式之一,其中光伏发电是太阳能发电的主要方式之一,并网光伏发电系统的建设,将光伏发电系统以微网的形式接入到大电网并网中,与大电网相互支撑,对提高光伏发电规模以及电能质量具有重要意义。本文就光伏发电并网中的电能质量问题进行了分析。 相似文献
6.
提出了一种城市轨道地面车站屋顶太阳能光伏发电系统。从光伏发电系统工作原理、城市轨道交通高架车站用电负荷、车站屋顶太阳能光伏发电容量估算以及车站光伏发电系统方案等方面做了研究,对于建设节能减排新型城市轨道交通具有指导意义。 相似文献
7.
针对传统农业温室大棚具有电力供应成本高、寿命短、不环保、温控不理想、种植效益低等缺陷,本文提出一种将光伏发电系统与温室大棚相结合的技术方法,并对其原理和应用形式进行分析研究,以达到温室大棚的节能、环保、高效的目的。 相似文献
8.
结合天津静海电网的网架,分析静海地区房屋中使用光伏发电系统的基本原理,结合光伏发电技术的发展,给出了系统设计方法,包括蓄电池容量的计算与选型、太阳电池板的设计、控制器和逆变器的选择、太阳电池方阵的计算和布置等。并将其应用于试点用户,实现了节能、绿色、环保的设计理念,证明了在家庭中应用光伏发电的可行性。 相似文献
9.
根据多种太阳光伏阵列自动跟踪系统应用示范,比较各种系统的发电提高效率及性价比,为推广新型太阳能光伏发电系统提供依据。 相似文献
10.
光伏发电是替代化石能源的一种最理想的方式,但较高的光伏发电成本成为制约其推广应用的主要因素。光伏发电逆变控制器是将光伏电池输出的直流电能转换为交流电能的装置,在能量转换和利用的过程中也产生了大量的能量损耗,增加了发电成本。因此,研究高效率光伏发电逆变控制器的拓扑及控制方法具有重要的理论意义和应用价值。 相似文献
11.
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
12.
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
13.
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
14.
《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
15.
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
16.
《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
17.
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
18.
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
19.
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
20.
《中国科学院院刊(英文版)》2014,(3)
<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence 相似文献