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Modeling and performance analysis of fuzzy based distributed generation supported distribution system 基于模糊的分布式发电支持配电系统建模与性能分析
Pub Date : 2010-11-01 DOI: 10.1109/RSTSCC.2010.5712874
S. Darly, P. Vanaja Ranjan, K. V. Bindu, A. Srikrishnan, P. Radha Krishnan, B. Justus Rabi
The traditional approach in an electrical power system is to have centralized large capacity power plants feeding power to distant load centers through an extensive transmission and distribution network. DG emerged as an alternative to upgrade transmission lines and increase the capacity of remote power plants. The connection of DG to a Distribution system meets the various challenges like power quality issues, contingency issues, voltage regulation etc. This paper proposes a technique by which a DG can provide voltage supported to the Distribution system by injecting reactive power in addition to real power. In this paper, separate Wind Turbine, Fuel cells based generation systems have been considered. These energy sources are coupled to an induction generator, which is interfaced to the grid through a rectifier inverter pair. The objective is to inject scheduled amount of real and reactive powers in the grid while maintaining the balance between input and output power. A separate Fuzzy controller has been incorporated to regulate the fuel input of fuel cells to compensate the changes in load demand. Normally wind turbine based DG injects the real power in the grid depending upon the prevailing wind speed. In this case DG remains unaffected by the variation in the load demand and the surplus power is fed by the utility itself. The simulations have been performed using MATLAB / SIMULINK.
电力系统的传统方法是由集中的大容量发电厂通过广泛的输配电网络将电力输送到遥远的负荷中心。DG成为升级输电线路和增加偏远发电厂容量的替代方案。DG与配电系统的连接面临着各种各样的挑战,如电能质量问题、应急问题、电压调节等。本文提出了一种通过向配电系统注入除实际功率外的无功功率为配电系统提供支撑电压的技术。在本文中,考虑了独立的风力发电机,燃料电池为基础的发电系统。这些能量源与感应发电机耦合,感应发电机通过整流逆变器对与电网连接。目标是在保持输入和输出功率平衡的同时,向电网注入预定数量的实功率和无功功率。采用单独的模糊控制器来调节燃料电池的燃料输入,以补偿负载需求的变化。通常情况下,基于DG的风力涡轮机根据盛行风速向电网注入实际电力。在这种情况下,DG不受负载需求变化的影响,剩余电力由公用事业公司自己提供。利用MATLAB / SIMULINK进行了仿真。
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引用次数: 1
Design techniques of Ground Station for pollution monitoring nanosatellite 污染监测纳米卫星地面站设计技术
Pub Date : 2010-11-01 DOI: 10.1109/RSTSCC.2010.5712820
B. Sheela Rani, C. D. Suryakala, T. A. Shanmuga sundaram, N. Hari Prasad, S. Siva Sundara Pandian, Godwin Premi, A. Aranganathan, Tinku Kumar, Shishir Gaurav, Akash R. Mitra
Recent environmental fiascos, oil spills, regular emission of huge amount of Greenhouse gases, negligence in implementing pollution control strategies, etc. have led to drastic change in the global climate. Abrupt changing of climate and increasing sea level have posed a great threat to human existence, along with its flora and fauna. To monitor the air pollution more effectively, and to provide a precise data model of pollution level, we are implementing space technology in monitoring the Greenhouse gases over a particular region. Our nanosatellite is having a spectrometer as a payload for monitoring the greenhouse pollutants over a given region. We propose in this paper the ground station design techniques to receive the data and process it in our university campus. The Ground Station is capable of providing VHF/UHF communications in the frequency ranges of 144–146MHz and 430–440MHz, with our dedicated satellite in LEO. The proposed designed of circular polarized, crossed yagi antenna will perform autonomous tracking efficiently to acquire data from the satellite. Our ground station consists of the Antenna system including rotor interface, transceiver and terminal node controller (as the Modem system) and the Processing system.
最近的环境灾难,石油泄漏,大量温室气体的定期排放,污染控制战略的疏忽等导致了全球气候的急剧变化。气候突变和海平面上升对人类及其动植物的生存构成了巨大威胁。为了更有效地监测空气污染,并提供精确的污染程度数据模型,我们正利用空间技术监测特定地区的温室气体。我们的纳米卫星有一个光谱仪作为有效载荷,用于监测特定地区的温室污染物。本文提出了在我校校园内进行数据接收和处理的地面站设计技术。地面站能够在144-146MHz和430-440MHz的频率范围内提供甚高频/超高频通信,我们的专用卫星在LEO。所设计的圆极化交叉八木天线能够有效地进行自主跟踪,获取卫星数据。我们的地面站由天线系统(包括转子接口)、收发器和终端节点控制器(作为调制解调器系统)和处理系统组成。
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引用次数: 0
Optical effect on the buried gate MESFET with time dependent characteristics 具有时间相关特性的埋门MESFET的光学效应
Pub Date : 2010-11-01 DOI: 10.1109/RSTSCC.2010.5712824
T. Jaya, V. Kannan
Time - dependent characteristic of buried-gate GaAs MESFET with front illumination have been analyzed by solving continuity equation. This analysis includes the ion implanted buried-gate process. At time ‘t’ is equal to zero, the light through the optical fiber is turning ‘ON’ and ‘OFF’ has been considered. The channel charge and channel current have been evaluated and discussed. Buried-gate optical field effect transistor (OPFET) will be highly suitable for optical communication and optical computing.
通过求解连续性方程,分析了具有前照度的埋门GaAs MESFET的时变特性。本分析包括离子注入埋栅过程。当t = 0时,通过光纤的光处于“ON”状态,我们考虑了“OFF”状态。对通道电荷和通道电流进行了评价和讨论。埋门光场效应晶体管(OPFET)将非常适合于光通信和光计算领域。
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引用次数: 0
Optical response of Quantum Dot Transistor with front side illumination 正面照明下量子点晶体管的光学响应
Pub Date : 2010-11-01 DOI: 10.1109/RSTSCC.2010.5712862
V. Vijayakumar, R. Seshasayanan
The theoretical work for the DC performance of Quantum Dot Transistor under Front side illumination is presented. A device structure consist of Quantum Dots in the GaAs layer is considered for illumination. The photoconductive effect in the GaAs and QD layer which increases the 2DEG Channel electron concentration is considered. The I–V Characteristics of Quantum Dot Transistor, under dark and illumination condition have been evaluated, plotted and discussed.
对量子点晶体管在正面照明下的直流性能进行了理论研究。考虑了一种在砷化镓层中由量子点组成的器件结构用于照明。考虑了GaAs和QD层的光导效应,提高了2DEG通道的电子浓度。对量子点晶体管在黑暗和光照条件下的I-V特性进行了评价、绘制和讨论。
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引用次数: 2
Scope and consequence of fertilizer on global emissions and its effect on climate change 化肥对全球排放的范围和后果及其对气候变化的影响
Pub Date : 2010-11-01 DOI: 10.1109/RSTSCC.2010.5712788
Dr. Jeppiaar
Intensive agriculture is the only way to feed the projected 9 billion people on the planet (FAO, 2002) by the end of this century. Agriculture is a major contributor of 10–12% of total global anthropogenic Green House Gases (GHG) to the atmosphere, but the emissions vary depending on the land use and the way that the land is managed. Fertilizer, energy - and chemical-intensive farming also contribute to the increased levels of greenhouse gas emissions, primarily as a result of the overuse of fertilizers, land clearance, soil degradation, and intensive animal farming. The Green House Gases (GHG) emissions from agriculture are (i) Nitrous oxide (N2O) resulting from excess fertilizer, results emissions from soil contributing to climate change (ii) Methane (CH4) from rice fields and enteric fermentation of cattle constitute emissions from agriculture (iii) Annual exchanges of CO2 between the atmosphere and agricultural lands, the net flux is estimated to be approximately balanced, with CO2 emissions. Assessing GHG emissions on laboratory, field and large scale is tedious, time consuming and laborious. This paper discuss about the activities and its consequences around the globe.
到本世纪末,集约化农业是养活地球上预计的90亿人口的唯一途径(粮农组织,2002年)。农业是全球人为温室气体(GHG)排放总量的10-12%的主要贡献者,但排放量因土地利用和土地管理方式而异。化肥、能源和化学品密集型农业也导致温室气体排放水平上升,其主要原因是过度使用化肥、清理土地、土壤退化和集约化畜牧业。农业产生的温室气体(GHG)排放有:(i)过量肥料产生的氧化亚氮(N2O)、土壤产生的导致气候变化的温室气体排放(ii)稻田和牛的肠道发酵产生的甲烷(CH4)构成农业排放(iii)大气和农田之间每年的二氧化碳交换,估计净通量与二氧化碳排放大致平衡。温室气体排放的实验室、现场和大规模评估是一项繁琐、耗时和费力的工作。本文讨论了全球范围内的活动及其后果。
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引用次数: 1
Recognizing and estimating rainfall using cloud images 利用云图识别和估计降雨
Pub Date : 2010-11-01 DOI: 10.1109/RSTSCC.2010.5712875
S. Oswalt Mano, John Patrick Ananth, V. Kavitha, J. SahayaAru
Water is elixir of life. So rainfall becomes the inevitable part of every nation which decides the prosperity and economic scenario of a country. In this fast moving world, estimation of rainfall has become a necessity especially when the global heat levels are soaring. The proposed approach here is to use the digital cloud images to predict rainfall. Considering the cost factors and security issues, it is better to predict rainfall from digital cloud images rather than satellite images. The status of sky is found using wavelet. The status of cloud is found using the Cloud Mask Algorithm. The type of cloud can be evolved using the K-Means Clustering technique. As per previous research works done by the researchers, it is stated the Nimbostratus and Cumulonimbus are the rainfall clouds and other clouds like cumulus will produce rain at some rare chances. The type of rainfall cloud is predicted by analyzing the color and density of the cloud images. The cloud images are stored as JPEG file in the file system. Analysis was done over several images. The result predicts the type of cloud with its information like classification, appearance and altitude and will provide the status of the rainfall. The proposed approach can be utilized by common people to just take the photograph of cloud and can come to conclusion about the status of rainfall and to get the desired detail.
水是长生不老药。因此,降雨成为每个国家不可避免的一部分,决定了一个国家的繁荣和经济前景。在这个快速发展的世界里,对降雨量的估计已经成为一种必要,尤其是在全球气温飙升的时候。这里提出的方法是使用数字云图来预测降雨。考虑到成本因素和安全问题,用数字云图来预测降雨比用卫星图像更好。利用小波对天空的状态进行分析。利用云掩码算法找到云的状态。云的类型可以使用K-Means聚类技术来进化。根据研究人员以往的研究工作,雨云和积雨云是降雨云,而积雨云等其他云在极少数情况下会产生降雨。通过分析云图的颜色和密度来预测降雨云的类型。云图像以JPEG文件的形式存储在文件系统中。对几幅图像进行了分析。结果预测云的类型及其信息,如分类,外观和高度,并将提供降雨的状态。所提出的方法可以被普通人仅仅用于拍摄云的照片,并且可以得出关于降雨状态的结论并获得所需的细节。
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引用次数: 1
Significance of dielectrics in space technology 电介质在空间技术中的意义
Pub Date : 2010-11-01 DOI: 10.1109/RSTSCC.2010.5712823
T. Indira, T. Thenappan
The main objective of this paper is to provide a brief and necessary background of dielectrics in the field of space technology. The mobile telephone, TV, Radio, Satellite or any type of modern communication is not possible without one type of antenna or the other and no radar works without an antenna. Antenna is a sensor of electromagnetic waves. Electric and magnetic fields exist in a dielectric material and also penetrate the dielectric material freely. When an electromagnetic wave is incident normally on the surface of a dielectric, reflection and transmission takes place. In this investigation, dielectric polarization studies were made in the liquid dielectric mixtures Epichlorohydrin, p-cresol in benzene using standard methods at 308K.The values of dielectric constant, refractive index and density were measured at different concentrations. The dipolar increment value has been calculated using Huyskens method based on Onsager's theory.
本文的主要目的是为空间技术领域的电介质提供一个简要和必要的背景。移动电话、电视、广播、卫星或任何类型的现代通信都离不开一种或另一种天线,没有天线就没有雷达工作。天线是电磁波的传感器。电场和磁场既存在于介质中,又能自由穿透介质。当电磁波正常入射到电介质表面时,就会发生反射和透射。在308K条件下,用标准方法对苯中环氧氯丙烷、对甲酚的液体介质混合物进行了介电极化研究。测定了不同浓度下的介电常数、折射率和密度。在Onsager理论的基础上,用Huyskens法计算了偶极增量值。
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引用次数: 0
Study on soil bio-remediaton for preventing groundwater contamination of chromium bearing leather processing waste dumping sites 含铬皮革加工废弃物倾倒场地下水污染防治的土壤生物修复研究
Pub Date : 2010-11-01 DOI: 10.1109/RSTSCC.2010.5712794
S. Laxmipriya, M. Sivakumar, K. Anand, P. Shanmugam
Around 2300 tanneries in India produces 6000 tones of solid waste per annum, that includes 15000 tones of chromed leather shavings waste. This contain Chromium. Cr (VI) compounds used in leather processing which are highly water soluble, toxic, carcinogenic and a potential ground water contaminant. The MoEF have classified the chromium bearing solid wastes in the hazardous waste category that necessitates the disposal mechanism such as landfilling, stabilization, solidification etc., Many advanced chromium treatment methods were emerged that includes physio-chemical extraction and phytoremediation , but did not give complete solution to the problems. However, the bioremediation is one of the promising technology that is expected to play an important role in soil waste clean-up although, still in the preliminary stage. This is attributed to lack of proper understanding on integrating the geochemistry, geomicrobiology, geomorphology with soil stratification and mode of leachability. Therefore, this study is focused to evaluate the soil profile, geochemistry, geomorphology, biochemical transformation of cationic and anionic balances, specific organism's and their phylogenies for chromium degradation in Cr dumped sites. The present paper describes the important process of soil bioremediation based on the existing literatures, identified the gap in research for mobility of chromium degrading bacteria at different, compacted, non-compacted, porous and non-porous soil strata. A standard bioremediation protocol is the need of the hour to be developed for soil bioremediation in a confined and unconfined soil which can further be extended to other metals/salts such as (Ni, Fe, Zn, Cobalt) in contaminated waste dumping sites.Therefore, the laboratory and field level natural investigation on chromium contaminated waste dumping sites and sparging/injecting clusters of micro organisms that are capable of degrading chromium with a rich carbon source in the soils near Chromate industries at Ranipet, TamilNadu has been proposed as a complete detoxification of chromium before it reaches the groundwater.
印度大约2300家制革厂每年产生6000吨固体废物,其中包括15000吨镀铬皮革屑废物。这含有铬。皮革加工中使用的高水溶性、有毒、致癌和潜在地下水污染物的铬(VI)化合物。环保部已将含铬固体废物归为危险废物,需要采用填埋、稳定化、固化等处理机制,出现了许多先进的铬处理方法,包括理化提取和植物修复等,但并没有完全解决问题。然而,生物修复技术是一种很有前途的技术之一,有望在土壤废物净化中发挥重要作用,尽管目前还处于初级阶段。这主要是由于对地球化学、地球微生物学、地貌学与土壤分层和可浸性模式的综合认识不足。因此,本研究主要从土壤剖面、地球化学、地貌、正阴平衡生化转化、特定生物及其系统发育等方面对铬倾倒场的降解进行研究。本文在现有文献的基础上,阐述了土壤生物修复的重要过程,指出了铬降解菌在不同土壤层(压实、非压实、多孔和非多孔)下迁移能力的研究空白。标准的生物修复方案需要一小时来制定,用于在密闭和非密闭土壤中进行土壤生物修复,可以进一步扩展到受污染废物倾倒场的其他金属/盐,如(Ni, Fe, Zn, Cobalt)。因此,在泰米尔纳德邦拉尼佩特铬酸盐工业附近的土壤中,对铬污染废物倾倒场和能够降解铬的微生物群进行实验室和现场水平的自然调查,并提出了在铬到达地下水之前将其完全解毒的建议。
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引用次数: 1
Environmental impact of improper disposal of electronic waste 不当处置电子废物对环境的影响
Pub Date : 2010-11-01 DOI: 10.1109/RSTSCC.2010.5712793
S. Devika
“Electronic-waste” or “E-waste” is a popular name for electronic products nearing the end of their useful life or just dumped due to the availability of new and advanced products in the market. E-waste consists of a concoction of metals and toxins. The environmental impacts caused by computer from the mining stage to its disposal as e-waste is dealt with in this paper. Scientific methods of disposal of e-waste should be carried out for reducing the environmental damage. Planting trees can help the earth recover from its damages.
“电子垃圾”或“电子垃圾”是一个流行的名称,指的是接近使用寿命的电子产品,或者是由于市场上有新的和先进的产品而被丢弃的电子产品。电子垃圾是金属和毒素的混合物。本文论述了计算机从开采阶段到作为电子垃圾处理所造成的环境影响。为了减少对环境的破坏,应该采取科学的方法处理电子垃圾。植树可以帮助地球从破坏中恢复过来。
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引用次数: 20
Integrating web services and agent technology with DIGIGEO agent 将web服务和代理技术与DIGIGEO代理集成
Pub Date : 2010-11-01 DOI: 10.1109/RSTSCC.2010.5712857
S. Sujatha, N. Sudha Bhuvaneswari, R. Yamuna
The advent of Internet has brought down geographical distances but proportionally increased the digital geographical distances with masses of data and information that demands more than a mind to comprehend. Every digital megabyte is a mile of physical distance. Getting the wrong information is like taking a wrong turn. It wastes time, energy, productivity and money. This growth has led to the demanding needs of effectively using Digital Geography. Intelligent agents can play a role in ensuring this doesn't happen. They are pieces of software focused on organizing and getting the best out of our digital geography. They will become extensions of our will, aiding in the fulfillment of our needs and wants. They will venture into the digital wilderness and bring back to us the list of options we demand. This paper focuses on developing an intelligent agent DIGIGEO that have been applied to tourism industry, especially in the Indian Railways and discusses on how it deals with the limitation of handling time delay of searching information in the tourism sector and dealing with the problem of online ticket booking. A model of the Agent has been proposed along with deployment and a performance evaluation result has been added to highlight on the effectiveness of the system. This paper also gives a brief introduction to intelligent agents and electronic commerce, followed by a review of agent technologies involved in buying and selling and the methodologies to endorse future digital geography with intelligent agents.
互联网的出现缩短了地理距离,但也相应地增加了数字地理距离,因为大量的数据和信息需要更多的大脑来理解。每一个数字兆字节就是一英里的物理距离。得到错误的信息就像拐错了弯。它浪费时间、精力、生产力和金钱。这种增长导致了对有效使用数字地理的迫切需求。智能代理可以发挥作用,确保这种情况不会发生。它们是一些软件,专注于组织和充分利用我们的数字地理。它们将成为我们意志的延伸,帮助我们满足需要和欲望。他们将冒险进入数字荒野,给我们带来我们所需要的一系列选择。本文重点研究了智能代理DIGIGEO的开发,并将其应用于旅游行业,特别是印度铁路,讨论了它如何解决旅游部门查询信息处理延迟的局限性和处理在线订票问题。在部署过程中提出了Agent的模型,并添加了性能评估结果,以突出系统的有效性。本文还简要介绍了智能代理和电子商务,然后回顾了涉及购买和销售的代理技术以及使用智能代理支持未来数字地理的方法。
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引用次数: 0
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Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)
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