Auswahl der wissenschaftlichen Literatur zum Thema „PV park“

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Zeitschriftenartikel zum Thema "PV park"

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Board, Editorial. „The National Maine Monument, 1913“. Public Voices 7, Nr. 1 (12.12.2016): 1. http://dx.doi.org/10.22140/pv.191.

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Alawasa, Khaled M., Rashid S. AlAbri, Amer S. Al-Hinai, Mohammed H. Albadi und Abdullah H. Al-Badi. „Experimental Study on the Effect of Dust Deposition on a Car Park Photovoltaic System with Different Cleaning Cycles“. Sustainability 13, Nr. 14 (08.07.2021): 7636. http://dx.doi.org/10.3390/su13147636.

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For a decade, investments in solar photovoltaic (PV) systems have been increasing exponentially in the Middle East. Broadly speaking, these investments have been facing tremendous challenges due to the harsh weather in this particular part of the world. Dust accumulation is one the challenges that negatively affects the performance of solar PV systems. The overall goal of this paper is to thoroughly investigate the effect of dust accumulation on the energy yield of car park PV systems. With this aim in mind, the paper presents scientific values for further research and opens the horizon for attracting further investments in solar PV systems. This study is based on a real PV system in the Sultanate of Oman and considers different cleaning cycles for 16 months (from 29 July 2018 to 10 November 2019). Furthermore, four different PV groups were assessed, and the system was monitored under different cleaning frequencies. In general, it was found that dust accumulation has a significant impact; under 29-day, 32-day, 72-day, and 98-day cleaning cycles, the average percentages of energy loss due to soiling were 9.5%, 18.2%, 31.13%, and 45.6%, respectively. In addition, the dust effect has a seasonal variation. The study revealed that dust accumulation has a more negative impact during summer than during winter. During summer, the energy losses due to soiling were 8.7% higher than those during winter. The difference was attributed to different environmental conditions, with high humidity and low wind speed being the main factors that worsen the impact of dust during summer. Based on the findings of this research, a monthly cleaning program is highly recommended in the city of Muscat.
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Coleman, J. E., L. N. Franks und M. D. Berry. „THE TECHNICAL, ENVIRONMENTAL AND CULTURAL CHALLENGES OF DRILLING ON THE EDGE OF A NATIONAL PARK“. APPEA Journal 45, Nr. 1 (2005): 535. http://dx.doi.org/10.1071/aj04041.

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Magellan Petroleum, operator of the Palm Valley Gas Field, successfully drilled the Palm Valley–11 (PV–11) gas development well situated on aboriginal land adjacent to the Finke Gorge National Park, Central Australia. The drilling site was located within the Palm Creek catchment area, an environmentally significant and internationally renowned area which feeds the rare and endangered red cabbage palm (Livistona mariae).Although no commercial gas flow was encountered, the well was a success in terms of the technical, environmental and cultural heritage challenges faced during the 71-day drilling program.Several mitigation measures not generally required in petroleum drilling operations were incorporated in the PV–11 Drilling Program and Environmental Management Plan (EMP).This paper describes the Commonwealth and Northern Territory approval processes required to ensure all risks were identified and addressed; the challenges of drilling the PV–11 well using under-balanced techniques in difficult conditions; and the mitigation measures adopted to address these challenges.
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Nash, C., J. Clough, D. Gedge, R. Lindsay, D. Newport, M. A. Ciupala und S. Connop. „Initial insights on the biodiversity potential of biosolar roofs: a London Olympic Park green roof case study“. Israel Journal of Ecology and Evolution 62, Nr. 1-2 (12.04.2016): 74–87. http://dx.doi.org/10.1080/15659801.2015.1045791.

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Cities dominated by impervious artificial surfaces can experience a multitude of negative environmental impacts. Restoration of green infrastructure has been identified as a mechanism for increasing urban resilience, enabling cities to transition towards sustainable futures in the face of climate-driven change. Building rooftops represent a viable space for integrating new green infrastructure into high-density urban areas. Urban rooftops also provide prime locations for photovoltaic (PV) systems. There is an increasing recognition that these two technologies can be combined to deliver reciprocal benefits in terms of energy efficiency and biodiversity targets. Scarcity of scientific evaluation of the interaction between PVs and green roofs means that the potential benefits are currently poorly understood. This study documents evidence from a biodiversity monitoring study of a substantial biosolar roof installed in the Queen Elizabeth Olympic Park. Vegetation and invertebrate communities were sampled and habitat structure measured in relation to habitat niches on the roof, including PV panels. Ninety-two plant species were recorded on the roof and variation in vegetation structure associated with proximity to PV panels was identified. Almost 50% of target invertebrate species collected were designated of conservation importance. Arthropod distribution varied in relation to habitat niches on the roof. The overall aim of the Main Press Centre building green roof design was to create a mosaic of habitats to enhance biodiversity, and the results of the study suggest that PV panels can contribute to niche diversity on a green roof. Further detailed study is required to fully characterise the effects of PV panel density on biodiversity.
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Damianaki, Katerina, Christos A. Christodoulou, Christos-Christodoulos A. Kokalis, Anastasios Kyritsis, Emmanouil D. Ellinas, Vasiliki Vita und Ioannis F. Gonos. „Lightning Protection of Photovoltaic Systems: Computation of the Developed Potentials“. Applied Sciences 11, Nr. 1 (31.12.2020): 337. http://dx.doi.org/10.3390/app11010337.

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In this paper, the performance of a lightning protection system (LPS) on a grid-connected photovoltaic (PV) park is studied by simulating different scenarios with the use of an appropriate software tool. The aim of this paper is to highlight the importance of an LPS and optimize its design for the protection of equipment and personnel in case of a direct lightning strike. In particular, developed potential due to lightning strikes is examined considering isolated and non-isolated external LPS. Moreover, the effect of the separation distance on the lightning performance of the PV installation is investigated for different soil structures and grounding systems. The extracted results are expected to support the design and implementation of a secure PV park and endorse its uninterrupted operation considering techno-economically balanced protection measures.
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Yee, Myat Mon, und Chatchai Sirisamphanwong. „Analysis of the Impact of Distributed Grid-Connected PV System on Power Quality of the Electrical Distribution Network“. Applied Mechanics and Materials 839 (Juni 2016): 124–29. http://dx.doi.org/10.4028/www.scientific.net/amm.839.124.

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Electricity generation from solar energy by using PV cells is drastically increased due to global warming concern, greenhouse effect, and quality of living standards. However, PV generation may offer variable and unpredictable energy output due to intermittent nature of solar irradiance and hence, integration of PV into grid may provide some drawback effect to the power system. The aim of this paper is to investigate the impact of grid connected PV system on the power quality of distribution network. The power quality analysis is based on real measurements of 10 kWp, Energy Park SERT, School of Renewable Energy, Naresuan University, Thailand. Parameters such as active and reactive power, voltage, current, power factor, THDv, THDi, individual harmonic voltage and harmonic current are observed for the investigation of the interaction between SERT PV system and distribution network’s power quality. According to the measured data, PV system operation is negligible in terms of voltage distortion, voltage magnitude and frequency variation. Therefore, it can be noticed that 10 kWp SERT PV system does not effect on the distribution system power quality due to low PV penetration level.
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Sekoguchi, Masahiro, Tetsuo Yamada, Yusuke Abe, Yoshihiro Takada, Masahiro Yoshioka und Riichiro Sakamoto. „Measured Evaluation of PV-DG-Hybrid Power Solutions in Indian Japanese Industrial Park“. IEEJ Transactions on Power and Energy 139, Nr. 7 (01.07.2019): 470–77. http://dx.doi.org/10.1541/ieejpes.139.470.

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Gast, Maren. „Managementlösung für Photovoltaik-Parks jeder Größe“. BWK ENERGIE. 71, Nr. 09 (2019): 11–13. http://dx.doi.org/10.37544/1618-193x-2019-09-11.

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PARKMANAGEMENT | Aufgrund sinkender Systemkosten erhöht sich die Wirtschaftlichkeit der Photovoltaik (PV) stetig. Mittlerweile werden in Deutschland erste große PV-Parks ohne staatliche Förderung geplant. So möchte EnBW den mit 175 MW größten Park in der Nähe von Berlin umsetzen. Der dort erzeugte subventionsfreie Strom soll schon 2020 zur Verfügung stehen. Mit dem Parkmanagementsystem von Phoenix Contact lässt sich der Inbetriebnahme- und Wartungsaufwand solcher Großanlagen um bis zu 50 % reduzieren.
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Al Siyabi, Idris, Arwa Al Mayasi, Aiman Al Shukaili und Sourav Khanna. „Effect of Soiling on Solar Photovoltaic Performance under Desert Climatic Conditions“. Energies 14, Nr. 3 (28.01.2021): 659. http://dx.doi.org/10.3390/en14030659.

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The solar irradiation at the gulf Arabia is considered one of the highest in the world. However, this region is classified as a desert with high dust accumulation. Thus, the objective of this study is to analyze the effect of soiling and the photovoltaic (PV) tilt angle on the performance of 2.0 MWp of car park PV plant in Oman. Experimental measurements were taken and a model was developed for simulation. The power generation by the cleaned PV system was measured as 1460 kW around noon. After one week of operation, the power production (at the same irradiance level) reduced to 1390 kW due to soiling. It further reduced to 1196 kW and 904 kW after three and five weeks of operation, respectively. The results also show that a soiling-percentage of 7.5% reduced the monthly electricity generation (307 MWh) by 5.6% and a soiling-percentage of 12.5% reduced the generation by 10.8%. Furthermore, the increase in tilt is not recommended due to the duo-pitch canopy effect of the car park where the panels with 180° azimuth generate lower electricity than the panels with 0° azimuth. In addition, the part of the car park with 180° azimuth caused shading to the other part for high tilt angles.
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Linhart, Matthias, Valerie Rodin, Simon Moser und Andrea Kollmann. „Citizen Participation to Finance PV Power Plants Focused on Self-Consumption on Company Roofs—Findings from an Austrian Case Study“. Energies 14, Nr. 3 (31.01.2021): 738. http://dx.doi.org/10.3390/en14030738.

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Despite large amounts of available roof space, long pay-back periods for investments in photovoltaic (PV) power plants often hinder PV installations in industrial parks. Photovoltaic citizen participation initiatives (PV-CPI) are an alternative way of financing PV power plants that add non-financial benefits to these investments. This paper analyzed the feasibility of the installation of PV power plants focused on high rates of self-consumption financed by citizen participation initiatives on the roofs of five companies located in the Austrian Ennshafen industrial business park based on the net present value and the discounted pay-back period and compared it to a standard financing scheme, assuming a predetermined interest rate for participants as well as economies of scale with respect to the specific installation costs due to a joint purchase of the PV power plants. To calculate the feasibility, site-specific data and literature input have been used. The results show that despite an interest rate above the current interest rates of conservative forms of investments provided to (small-scale) investors, a payback-period of 17–23 years can be reached while the joint purchase can lead to a competitive feasibility of the PV-CPI compared to an individual purchase of PV power plants.
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Dissertationen zum Thema "PV park"

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Ghebre, Temesghen Tesfazghi. „The Viability of Installing Mid-Size PV Solar Parks in Sweden : "A paper that evaluates the economic viability of installing mid-size PV solar parks ranging from 250 kW to 2 MW in the village of Åled."“. Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-33931.

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The ambition of the Swedish government is rapidly concentrating on the development of the renewable energy systems especially on wind energy, bio energy and solar energy. It has been observed on the growth of the production of electricity and heat from these three mentioned renewable energy systems. But, relatively in Sweden the share of production of electricity obtained from PV is quite smaller than the other two. The PV electricity production in Sweden comprises in a large scale of mainly the grid connected distributed PV systems and with a small number of installed solar parks. The aim of this paper is to analyze the viability of installing mid -size PV solar parks in Sweden and to simulate the effect of the proposed project in the village’s (Åled is the village where the proposed site is located) and the country’s electricity production. This study includes designing, simulation and financial analysis of different grid connected centralized mid -size capacities of PV solar parks of 250 kWp,500 kWp,1MWp and 2MWp. They are all fixed ground mounted systems. Moreover, it also discusses the main reasons that hinders decision makers, the PV complications that are connected to the grid, Sweden’s energy regulations particularly the emission regulation and the financial policies of PV. Also, study visit, telephone and email contacts have supplemented it. This study was done with the collaboration of Nyedal Solenergi, in which the proposed site was owned by the company and this paper will be a future guide for the investment of the mid-size PV solar park. According to the study a discussion has been made with the grid supplier (EON) in that area on the investment on one of the designed projects which are presented in this paper. The results of the study show that the effect of the proposed systems on the production of electricity in the village of Åled was between 2.68 – 21.4 % and the impact on the country’s PV electricity production was 0.2 – 1.58 %. And, the possibility of installing mid-size PV solar parks generally in Sweden particularly in the proposed site is possible and economically it is viable but not profitable for system capacities less than 1 MW. As the IRR found for all capacities is greater than the estimated WACC, hence each proposed capacity has the possibility of paying back all its investment costs in about 23 years. So, the profitability is very low in case of the 250 kWp and 500 kWp but for the others they have about 7-8 years of profitability. A sensitivity analysis also has shown the impact of initial investment costs, O & M costs and electricity export rate on the IRR, NPV and equity payback. The initial investment cost and electricity export rate were seen with high effect on the IRR, NPV and equity payback. The LCOE calculated was higher than the average electricity spot price (300 SEK/MWh) for 250 kWp and 500 kWp but lower for the other two capacities. The overall impact for the financial analysis was due to the decreasing of module prices, the rules that changes every year on electricity subsidies for renewables, tax reductions and rapid decreasing of electricity spot prices. In the future if the price of modules continues decreasing, spot price increases, more modification of the subsidy and introduction of new PV technologies integrated with other sources of energy is done then such projects could be more profitable.
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Boman, Kristin, Ida Adolfsson und Sofia Ekbring. „Bifacial photovoltaic systems established in a Nordic climate : A study investigating a frameless bifacial panel compared to a monofacial panel“. Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-384180.

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The aim with this project was to study the power output from a frameless bifacial photovoltaic (PV) system relative to a traditional monofacial PV system with a frame. A general overview of how the geographical conditions affects the energy utilization of different PV systems is investigated throughout the project. Also, the study examined if further comparisons and evaluations, between PV systems, can be better established. The two examined solar parks, installed under different conditions, are located in Uppsala and Enköping, Sweden. In order to fulfill the aim and compare the different PV systems, three cases were analyzed. To increase the credibility of a comparison between the two cities, a sensitivity analysis considering the weather condition was executed. In case one, the result indicates that a bifacial panel is 5.2% and 3.6% more advantageous than a traditional monofacial panel during summer and winter, respectively. In case two, the frameless, more tilted and elevated bifacial panel is 58% and 680% more advantageous than a traditional monofacial panel during summer and winter, respectively. Also, in case three, the frameless, more tilted and elevated bifacial panel is 19% and 76% more advantageous than a bifacial panel with frame during summer and winter, respectively. When installing a new solar park, it is important to consider the location’s specific features since these affects the energy yield of the PV system. Future installations, which are installed with the intention to evaluate certain properties, is suggested to be installed with more initially comparable conditions in mind.
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Bränström, Amanda, und Jonna Söderberg. „Combining Smart Energy Storage with a Nordic PV Park : An explorative study of revenue-improving and cost-reducing battery services“. Thesis, Uppsala universitet, Byggteknik och byggd miljö, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-447012.

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With global climate change as the main driver, there is an increase towards including more variable renewable energy (VRE) sources in the electricity mix. Energy production from utilizing the photovoltaic effect, or PV power, is increasing rapidly and is visioned to cover 5 – 10 % of Sweden’s electricity demand in 2040. In addition to rooftop PV production, large- scale PV production in the form of ground-mounted PV parks is gaining ground. A higher share of VRE in the power system creates new challenges as to uphold the power system stability. For a PV park owner, achieving a preferable economic outcome is also a challenge, as the variable electricity output may not match electricity demand. Therefore, combining a PV park with an energy storage, which can store the PV production energy, is seen as a favorable solution. This way, the variability of the electricity production can be reduced and the stored energy in the battery can be used for services benefitting both the PV park owner and the power grid. This study aims to explore the economic potential of combining a PV park with an energy storage. This is achieved by simulating a lithium-ion (Li-ion) battery storage combined with PV production modeled after a 3.5 MW PV park located in Fyrislund, Uppsala. Five cases with individually differing approaches are simulated, exploring how so-called service stacking can be applied with a battery. The investigated services included in the cases are 1) lowering the cost of connecting the PV park to the power grid, 2) lowering the cost of feeding in energy to the power grid, 3) increasing the revenue of selling electricity on the Nord Pool spot market, 4) increasing the revenue by performing energy arbitrage, 5) increasing the revenue by participating in the primary frequency regulating markets to help stabilize the 50 Hz grid frequency. The cases are evaluated by calculating the net present value (NPV) of the system over 10 years with an annual discount rate of 5 %. Battery capacities ranging from 0.1 MWh/0.1 MW to 8 MWh/2 MW are tested. The system configuration achieving the highest NPV occurs when all services are performed, and a 0.13 MWh/0.1 MW battery is used. This NPV is also higher than the NPV when not including a battery in the system. Conclusions include that the spot price impacts the choice of battery capacity to a high extent and that the battery investment cost motivates using a smaller-sized battery.
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Majid, Safwat. „Åtgärder för ökad markanvändning i solcellspark : En tekno-ekonomisk fallstudie om potentialen hos bifacial och solföljare i Solpark Fyrislund“. Thesis, Uppsala universitet, Solcellsteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-447110.

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Solar parks are increasingly getting a larger market share of PV installations over the world, and have for the last couple of years managed to establish itself in the Swedish market. The market has for a long time been known for its decline in module prices, which has allowed an emergence of more efficient PV-techniques such as one-axis trackers and bifacial modules. Bifacial modules use the backside of modules for improved utiliziation of incoming light, while one-axis trackers have the ability to track the sun in order to maximise light absorption. These innovations have now caught the interest of companies willing to invest in large-scale PV-farms, where efficient land use is highly regarded. The aim of this thesis was to examine how bifacial modules and one-axis trackers perform in terms of system performance and profitabilty if implemented in 'Solpark Fyrislund', a solar park owned by Vasakronan AB. This was done by modelling and simulating cases in which said techniques were incorporated. The data was later used to estimate profitabilty of each investigated case. Results showed that the highest system performance and profitability was achieved by installing bifacial modules on the site. One-axis trackers are currently too expensive, require higher maintenance and has a higher demand for land, resulting in its profitability not being justified. It was also found that the current configuration could be optimized further for higher profit, by slightly reducing the pitch as well as increasing the tilt of the existing modules. The study should be followed up by further investigating the use of backtracking for one-axis trackers. Said innovations should also be more established in the Swedish market so that CAPEX- and OPEX prices become more accessible.
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Nunes, Meirieli. „Aplicação de fungicidas e Trichoderma asperellum para o manejo de doenças do feijoeiro comum“. Universidade Estadual do Oeste do Paraná, 2016. http://tede.unioeste.br:8080/tede/handle/tede/1332.

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The aim of this study was to evaluate the effects of the application of chemical and alternative products in the control of anthracnose and bacterial blight common and the agronomic characteristics of the bean. The experimental design was a randomized block design with eight treatments and four replications. The treatments were: control; Trichoderma asperellum; Copper hydroxide; Trifloxystrobin + Prothioconazole; Trifloxystrobin + tebuconazole; + Thiophanate methyl ester; Pyraclostrobin and Fentin Hydroxide, for both experiments (crop harvest of the waters and dry), all applied in V4 and R6 stage. The cultivar used was the IPR Tangara. Compared to control plants treated with copper hydroxide, the two growing seasons, in general, they had less severe in the pods, both anthracnose and for the common bacterial blight. Plants treated with T. asperellum, the two growing seasons, in general, showed the severity pods for both anthracnose and for the common bacterial blight similar plants that have been treated with Trifloxystrobin + Prothioconazole fungicides, Trifloxystrobin + Tebuconazole, thiophanate + Methyl, Fentin hydroxide and Pyraclostrobin. During the spring, plants treated with Trifloxystrobin + Prothioconazole showed higher grain yield, although not differ from other fungicides. During the spring, plants were treated with T. asperellum and plants that have been treated with fungicides, were statistically similar productivity except the plants treated with Trifloxystrobin + Prothioconazole. In the season of drought, plants treated with Trifloxystrobin + Tebuconazole, Thiophanate Methyl +, Pyraclostrobin Hydroxide and Fentin had higher grain yield, but did not differ from other chemical treatments and plants that have been treated with T. asperellum
O objetivo deste estudo foi avaliar os efeitos da aplicação de produtos químicos e alternativo no controle da antracnose e crestamento bacteriano comum e nas características agronômicas do feijoeiro. O delineamento experimental utilizado foi o de blocos casualizados, com oito tratamentos e quatro repetições. Os tratamentos utilizados foram: Testemunha; Trichoderma asperellum; Hidróxido de cobre; Trifloxistrobina + Protioconazol; Trifloxistrobina + tebuconazol; Tiofanato + Metílico; Piraclostrobina e Hidróxido de Fentina, para ambos os experimentos (safra das aguas e safra da seca), todos aplicados no estádio V4 e R6. A cultivar utilizada foi a IPR Tangara. Em relação a testemunha, plantas tratadas com Hidróxido de Cobre, nas duas épocas de cultivo, de maneira geral, apresentaram menor severidade nas vagens, tanto para a antracnose, como para o crestamento bacteriano comum. Plantas tratadas com T. asperellum, nas duas épocas de cultivo, de maneira geral, apresentaram severidade nas vagens, tanto para a antracnose, como para o crestamento bacteriano comum semelhante as plantas que foram tratadas com os fungicidas Trifloxistrobina + Protioconazol, Trifloxistrobina + Tebuconazol, Tiofanato + Metílico, Hidróxido de Fentina e Piraclostrobina. Na safra das águas, plantas tratadas com Trifloxistrobina + Protioconazol, apresentaram maior produtividade de grãos, apesar de não diferir dos demais fungicidas. Na safra das águas, plantas que foram tratadas com T. asperellum e plantas que foram tratadas com fungicidas, tiveram produtividade estatisticamente semelhante, exceto as plantas tratadas com Trifloxistrobina + Protioconazol. Na safra da seca, plantas tratadas com Trifloxistrobina + Tebuconazol, Tiofanato + Metílico, Piraclostrobina e Hidróxido de Fentina apresentaram maior produtividade de grãos, porém não diferiu dos demais tratamentos químicos e das plantas que foram tratadas com T. asperellum
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Silva, Fernanda Pereira da. „Caracterização biológica e molecular de um bacteriófago específico para Xanthomonas campestris pv. campestris“. Universidade Federal de Viçosa, 2015. http://www.locus.ufv.br/handle/123456789/6502.

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Os vírus que infectam bactérias são denominados bacteriófagos, sendo também referidos como “fagos”. Os bacteriófagos que infectam bactérias fitopatogênicas, tem despertado crescente interesse devido ao seu potencial para o biocontrole. A bactéria Gram negativa Xanthomonas campestris pv. campestris, é o agente causal da podridão negra das brássicas (Brassicaceae), sendo responsável por perdas econômicas, resultantes do difícil controle. Assim, este trabalho teve como objetivo realizar o isolamento e a caracterização biológica e molecular de bacteriófagos infectando Xanthomonas campestris pv. campestris. Para isso, plantas da família Brassicaceae apresentando sintomas da podridão negra e solo rizosférico, foram coletados em campos de cultura em Coimbra-MG e triados para a presença de bacteriófagos adotando a técnica de formação de placas de lise por meio da sobrecamada de ágar. Das nove amostras analisadas, uma amostra apresentou placas de lise persistente nos quatro ciclos de propagação. O fago foi denominado Xacp1 e apresentou cabeça icosaédrica de aproximadamente 30 ± 5 nm de diâmetro e uma cauda curta com 6 ± 0,2 nm de comprimento e 7 ± 0,2 nm de diâmetro. O bacteriófago possui ácido nucleico composto por uma única molécula de DNA fita dupla (dsDNA) com tamanho estimado em 65 Kpb. De acordo com a morfologia e tipo de genoma, o bacteriófago Xacp1 foi classificado na família Podoviridae (Ordem Caudovirales). A sequencia do genoma completo do fago está sendo analisada e será utilizada para estudar o relacionamento filogenético com outros bacteriófagos que infectam Xanthomonas campestris. O bacteriófago mostrou capacidade em infectar apenas isolados de Xanthomonas vcampestris pv. campestris no teste de susceptibilidade, apresentando placas de lise com coloração, tamanho e formato padrão. Isolados bacterianos relacionados e não relacionados a Xanthomonas campestris pv. campestres não foram suscetíveis à infecção. Em conjunto esses resultados demostram que Xacp1 apresentou características ideais de especificidade e virulência que motivam futuros estudos para sua utilização como uma ferramenta biotecnológica para a utilização no biocontrole da podridão negra em brássicas.
Viruses that infect bacteria are termed bacteriophages, and also referred to as “phage”, or “bacteriovírus”. The bacteriophages that infect bactéria plant pathogens, has attracted increasing interest due to its potential for biocontrol. The gram-negative bacterium Xanthomonas campestris pv. campestris is causal agent of black rot of crucifers (Brassicaceae), accounting for economic losses resulting from difficult to control. This study had objective perform the isolation and molecular characterization of biological and bacteriophage infecting Xanthomonas campestris pv. campestris. For this, plants of the family Brassicaceae showing symptoms of black rot and rhizosphere soil were collected in crop fields in Coimbra-MG and screened for the presence bacteriophage adopting the technique of forming plaques by agar overlay. The analyzed nine samples, one sample showed signs of Persistent lysis in four cycles of the spread. The phage was named φXacp1 and icosahedral head showed approximately 30 ± 5 nm in diameter and a tail short-± 5 nm in length and 0.7 ± 0.3 4 nm diameter. The bacteriophage has nucleic acid consists of a single double stranded DNA molecule (dsDNA) with size estimated at 65 kbp. According to the morphology and type of genome, bacteriophage φXacp1 scored in Podoviridae family (Order Caudovirales). The sequence the complete genome of the phage is being analyzed and will be used to study the phylogenetic relationships with other bacteriophages that infect Xanthomonas campestris. The bacteriophage showed ability to infect only Xanthomonas campestris pv. campestris in susceptibility testing, presenting plaques staining, size and pattern shape. Isolated bacterial related and unrelated to Xanthomonas campestris. Country were not susceptible to infection. viiTogether these results demonstrate that φXacp1 presented ideal characteristics of specificity and virulence that motivate future studies for its use as a biotechnological tool for use in biocontrol of black rot in crucifers.
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Cabral, Henrique Gabriel. „Estudo e desenvolvimento de um microinversor empregando o conversor ?uk para microgera??o fotovoltaica“. Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2016. http://tede2.pucrs.br/tede2/handle/tede/7819.

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This work presents a study and a development of a current source microinverter, based on the ?uk converter operating in discontinuous conduction mode, for microgeneration purposes based on photovoltaic systems. In this sense, we carried out a steady-state analysis of the ?uk converter, in order to establish the design criteria for the ?uk microinverter. All peripheral systems required for the microinverter operation have also been developed, and are included in this study, namely: the MPPT, PLL, and islanding detection algorithms. All control systems, i.e., the MPPT, PLL, and anti-islanding detection algorithms, were implemented in the DS1104 R&D controller board, from dSPACE?, using MATLAB/Simulink? to program it.
Este trabalho apresenta o estudo e o desenvolvimento de um microinversor de corrente, baseado no conversor ?uk, operando no modo de condu??o descont?nua, para a aplica??o em microgera??o fotovoltaica. Inicialmente, s?o desenvolvidos estudos de car?ter qualitativo e quantitativo do comportamento do microinversor de corrente baseado no conversor ?uk, os quais culminaram no desenvolvimento de crit?rios para o dimensionamento do conversor ?uk, que desempenha um papel central na estrutura do microinversor proposto. Sistemas perif?ricos necess?rios para a opera??o do microinversor, assim como aqueles exigidos pelas concession?rias de energia el?trica para a aplica??o em sistemas de microgera??o s?o estudados e desenvolvidos nessa disserta??o. Para tanto, a implementa??o de todos os sistemas de controle, ou seja, os algoritmos de MPPT, de sincronismo, e de detec??o da opera??o ilhada, foram realizados em ambiente MATLAB/Simulink? associada ? uma placa de desenvolvimento do fabricante alem?o dSPACE?, modelo DS1104, a qual permite o controle em tempo real dos transistores do microinversor.
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Silva, Maria Raquel. „Comparação da eficiência de meios semi-seletivos para a detecção de Xanthomonas axonopodis pv. phaseoli em sementes de feijoeiro“. Universidade Federal de Viçosa, 2002. http://www.locus.ufv.br/handle/123456789/10111.

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Fundação de Amparo à Pesquisa do Estado de Minas Gerais
Conselheiros: Reginaldo da Silva Romeiro e Onkar Dev Dhingra. Sete meios semi-seletivos foram avaliados quanto à sua eficácia em permitir o crescimento de isolados de Xanthomonas axonopodis pv. phaseoli e suprimir o crescimento de contaminantes, objetivando selecionar um meio para utilização na rotina de laboratório. Foram utilizados 48 isolados da bactéria, provenientes de diferentes regiões do Brasil. Todos os meios semi- seletivos apresentaram boa eficiência em permitir o crescimento da bactéria quando preparados sem a adição dos compostos antimicrobianos presentes em suas composições originais. Quando da adição desses compostos aos meios, apenas o meio MXP modificado (M-MXP) não foi eficiente na recuperação da bactéria. Através de antibiogramas qualitativo e quantitativo respectivamente, os isolados do patógeno foram expostos a 43 compostos antimicrobianos, em diferentes concentrações. Foram selecionados sete compostos aos quais todos os isolados se mostraram insensíveis. Quatro destes compostos foram adicionados separadamente e em conjunto ao meio padrão (meio 523), em diferentes concentrações, e permitiram o crescimento de todos os isolados. Os meios semi-seletivos foram testados quanto à sua repressividade, utilizando- se, para tal, seis isolados representativos do total. Verificou-se que houve uma variação muito grande no valor do índice de repressão (IR) dos meios para cada isolado. Em alguns casos, os meios semi-seletivos permitiram maior desenvolvimento da bactéria que o meio padrão. Avaliando-se a supressividade, todos os meios semi-seletivos foram mais eficientes que o meio padrão em suprimir o crescimento de contaminantes associados a sementes de feijão nas duas amostras testadas.
Seven semi-selective media were evaluated for their efficiency to allow the growth of Xanthomonas axonopodis pv. phaseoli isolates and suppress the growth of contaminants, to select a medium for use in laboratory routine tests. Forty-eight isolates of the bacterium, collected from distinct geographic regions of Brazil, were used. All semi-selective media permitted the growth of all isolates when prepared without the antimicrobial compounds presented on their original formula. When these compounds were added to the media, only the modified MXP did not permitted growth. Using qualitative or quantitative antibiograms, the isolates were exposed to forty-three different antimicrobial compounds and in different concentrations. Seven of these compounds to which the isolates showed insensibility were selected. Four of these compounds were added separately or together to the standard (523 medium), in different concentrations, and tested for growth of all the isolates. The semi- selective media were tested for their repression, using six representative isolates. There was a very high variation in repressing index value of the different media for each isolate. In some cases, the semi-selective media allowed more growth of the bacteria than the standard medium. Evaluating the suppression, all semi-selective media were found to be more efficient than the standard medium for suppressing the growth of contaminants associated with two bean seed samples.
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Baiocco, Luciana Maria. „Estudo de parametros para a produção de inoculos liofilizados de Xanthomonas campestris pv. manihotis“. [s.n.], 1997. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255997.

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Orientador: Adilma Regina Pippa Scamparini
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos
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Resumo: Inóculos liofilizados de Xanthomonas campestris pv. manihotis linhagem nº 280 foram produzidos visando à preservação da viabilidade celular e à manutenção da capacidade de produção de goma xantana pelo microrganismo liofilizado. No estudo de culturas liofilizadas não é possível avaliar somente um parâmetro isoladamente, uma vez que o processo de obtenção dos inóculos liofilizados envolve inúmeras etapas, todas com considerável grau de letalidade. Desta maneira, foram determinados os efeitos das condições de crescimento, dos diferentes meios de suspensão e de reidratação das células na taxa de sobrevivência do inoculo após a liofilização. A utilização do meio YM padrão como meio de cultivo e de suspensão das células e o uso de solução de leite desnatado reconstituído 10% como fluido de reidratação do inoculo liofilizado resultou na mais alta taxa de viabilidade celular obtida neste estudo. Nestas condições, foi obtido 80% de sobrevivência celular após a liofilização. Com a inoculação da cultura liofilizada em meio de fermentação contendo 2,0 g/l de sacarose foram produzidos 12,89 g/l de goma xantana, representando um aumento significativo na produção deste exopolissacarídeo em relação à produção de goma xantana através de inóculos convencionais líquido e por alçada. A viabilidade das células liofilizadas foi melhor preservada quando os inóculos foram armazenados a -20°C. O armazenamento em dessecador à temperatura ambiente comprometeu a taxa de sobrevivência das culturas ocasionando uma baixa recuperação de células viáveis. Testes de viabilidade realizados após 12 meses de preservação mostraram que as culturas liofilizadas, mesmo as armazenadas em dessecador à temperatura ambiente não sofreram deterioração morfológica, permanecendo estáveis. Não foi detectado também o aparecimento de sublinhagens mutantes formadoras de colônias de menor diâmetro.
Abstract: Freeze-dried inocula were produced from Xanthomonas campesiris pv. manihotis 280 strain to have in view the preservation of cell viability and its capability to produce xanthan gum by freeze-dried microorganism. During production of freeze-dried cultures it was not possible evaluate only one parameter, because the process to obtain the freeze-dried inocula involved several steps which presented a moderated lethal rate. It was determinated the effects of growth conditions and different suspending and rehydration fluids on the inocula survival rate after lyophilization. When YM broth was used as growth and cell suspension media and skim milk 10% used as rehydration fluid the highest viability rate was found. From this cultural conditions it was found approximately 80.33% of survival rate. When this freeze-dried inocula was inoculated in fermentation media containing 2% sucrose it was produced 12,89 g of xanthan gum per liter of broth. This data indicates a significant increase in the exopolysaccharide production. The viability of freeze-dried cells showed good preservation when the inocula were stored at -20°C. The storage at room temperature (25°C) compromised the culture survival rate occasionating a lower recovery of viable cells. Viability tests carried out after 12 months of preservation demonstrated that the freeze-dried culture stored at -20°C and at room temperature did not presented any morphological modification. It was not found any mutant strain capable to form smaller colonies.
Mestrado
Mestre em Ciência de Alimentos
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Tozzo, Rafael Gon?alves. „Desenvolvimento e teste de n? sensor solar para rssf“. Pontif?cia Universidade Cat?lica de Campinas, 2017. http://tede.bibliotecadigital.puc-campinas.edu.br:8080/jspui/handle/tede/975.

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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES
The dissertation describes the development of an autonomous wireless network element, which enables researchers to gather information in outdoor environments. Investigating the autonomy of sensor nodes, and the dimensioning of a battery and a photovoltaic panel. For the validation of the solution, is used the sensor node developed in this work to collect data in external areas for periods of time. Applying strategies for dimensioning an energy system to aiming the needs of a sensor node in an external environment. An energy-saving strategy has been developed with sleep mode that allows higher work cycles to the NSS. The results are the finding that the NSS worked in the period, through the voltage level of the battery, which is related to the energy of the same. It can be affirmed that the NSS functioned and the objective of monitoring quantities in outdoor environments.
A disserta??o descreve o desenvolvimento de um elemento de rede sem fio aut?nomo, que possibilita a pesquisadores a coleta de informa??es em ambientes externos. Investigando a autonomia de n?s sensores, e o dimensionamento de uma bateria e de um painel fotovoltaico. Para a valida??o da solu??o, utiliza-se o n? sensor desenvolvido para a realiza??o de coletas de grandezas em ?reas externas por per?odos de tempo. Aplicando estrat?gias de dimensionamento de um sistema de energia visando as necessidades de um n? sensor em ambiente externo. Foi desenvolvida uma estrat?gia de economia de energia, com sleep mode que permite ciclos de funcionamento maiores ao NSS. Os resultados ? a constata??o de que o NSS funcionou no per?odo, atrav?s do n?vel de tens?o da bateria, que est? relacionado com a energia da mesma. Podendo afirmar-se que o NSS funcionou e atente ao objetivo de monitorar grandezas em ambientes externos.
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Bücher zum Thema "PV park"

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Kitto, Bill. Commerce energy biogas/PV minigrid renewable resources program: Making renewables part of an affordable and diverse electric system in California. Sacramento, California]: [California Energy Commission], 2012.

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Liddament, Martin W. Photovoltaics as part of building facade design: A synthesis : a report of the European Air-Lit-PV project, "The development of a prototype facade unit integrating natural ventilation, daylighting, solar protection, intelligent control and photovoltaic power. Coventry: AIVC for Oscar Faber Group, 1999.

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Simon, Manner, und Niedermaier Tilman. Part I Commercial Arbitration in the Energy Sector, 4 Renewable Energy Disputes. Oxford University Press, 2018. http://dx.doi.org/10.1093/law/9780198805786.003.0004.

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This chapter relates to renewable energy disputes. ‘Renewable energies’ are understood in a broad sense as energy resources which are naturally replenished on a human timescale. The chapter focuses on wind and solar photovoltaics (solar PV) energy, describing typical project and contract structures, as well as challenges and disputes relating to their financing; development; construction; and operation, maintenance, and service. It pays special attention to questions relating to the individual contractual relationships between the project company, the project developer, the contractor(s), sub-contractors, and sub-suppliers. The chapter also contains a detailed, user-oriented analysis of the advantages and disadvantages relating to arbitrating commercial disputes in this sector.
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Buchteile zum Thema "PV park"

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Virmani, Kartik, Y. Raja Sekhar, Akshat H. Mutta, Tarun Sharma und Naushad Ali. „Smart Power Management System for Charging Plug-in Hybrid/Electric Vehicles Using Solar PV for Software Technology Park“. In Energy Systems in Electrical Engineering, 161–84. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6753-1_7.

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Brooks, Bill, und Sean White. „Article 690 Part III Disconnecting Means“. In PV and the NEC, 75–89. Second edition. | Abingdon, Oxon; New York, NY: Routledge, 2020.: Routledge, 2020. http://dx.doi.org/10.4324/9781003018773-5.

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Brooks, Bill, und Sean White. „Article 690 Part V Grounding and Bonding“. In PV and the NEC, 109–28. Second edition. | Abingdon, Oxon; New York, NY: Routledge, 2020.: Routledge, 2020. http://dx.doi.org/10.4324/9781003018773-7.

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Brooks, Bill, und Sean White. „Article 690 Photovoltaic Systems Part II Circuit Requirements“. In PV and the NEC, 25–60. Second edition. | Abingdon, Oxon; New York, NY: Routledge, 2020.: Routledge, 2020. http://dx.doi.org/10.4324/9781003018773-3.

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Brooks, Bill, und Sean White. „Article 690 Part IV Wiring Methods and Materials“. In PV and the NEC, 90–108. Second edition. | Abingdon, Oxon; New York, NY: Routledge, 2020.: Routledge, 2020. http://dx.doi.org/10.4324/9781003018773-6.

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Brooks, Bill, und Sean White. „Article 690 Part VI to the End of 690“. In PV and the NEC, 129–36. Second edition. | Abingdon, Oxon; New York, NY: Routledge, 2020.: Routledge, 2020. http://dx.doi.org/10.4324/9781003018773-8.

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„Part III: PV Today and Forever“. In Power for the World, 138–53. Jenny Stanford Publishing, 2010. http://dx.doi.org/10.1201/b11118-8.

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Fekik, Arezki, Mohamed Lamine Hamida, Hakim Denoun, Ahmad Taher Azar, Nashwa Ahmad Kamal, Sundarapandian Vaidyanathan, Amar Bousbaine und Nacereddine Benamrouche. „Multilevel Inverter for Hybrid Fuel Cell/PV Energy Conversion System“. In Advances in Environmental Engineering and Green Technologies, 233–70. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-7447-8.ch009.

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Power converters assume a significant part in fuel cell power generation systems and solar power conversion systems which are an alternative to fossil fuel production systems. There is therefore a demand for high quality power conditioning used in PEMFC systems and photovoltaic panels. This chapter proposes a hybrid electric power (FC/PV) production strategy with the use of converter topology as the power interface and also introduces a three-level inverter topology for different operating levels. The converter increases the input voltage to the rated voltage and turns into a DC bus; the multi-level inverter converts the voltage to AC and supplies AC loads. This chapter develops a hybrid electric power generation strategy, which can produce output with positive and zero sequences. Integrating the three-stage inverter into the hybrid renewable energy (FC/PV) production system allows for near sinusoidal current with low THD. The topology of hybrid energy production using the multi-level converter is tested on Matlab.
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Chiverton, John, und Kevin Wells. „PV Modeling of Medical Imaging Systems“. In Benford's Law. Princeton University Press, 2015. http://dx.doi.org/10.23943/princeton/9780691147611.003.0018.

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This chapter applies a Bayesian formulation of the Partial Volume (PV) effect, based on the Benford distribution, to the statistical classification of nuclear medicine imaging data: specifically Positron Emission Tomography (PET) acquired as part of a PET-CT phantom imaging procedure. The Benford distribution is a discrete probability distribution of great interest for medical imaging, because it describes the probabilities of occurrence of single digits in many sources of data. The chapter thus describes the PET-CT imaging and post-processing process to derive a gold standard. Moreover, this chapter uses it as a ground truth for the assessment of a Benford classifier formulation. The use of this gold standard shows that the classification of both the simulated and real phantom imaging data is well described by the Benford distribution.
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„Clinical skills“. In Tasks for Part 3 MRCOG Clinical Assessment, herausgegeben von Sambit Mukhopadhyay und Medha Sule. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198757122.003.0007.

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This task assesses the following clinical skills: … ● Patient safety ● Communication with patients and their relatives ● Information gathering ● Applied clinical knowledge … Mrs Zari Sardogan has a history of six weeks amenorrhoea, a positive pregnancy test and has presented with spotting PV. You are the registrar in the Early Pregnancy Assessment Unit. Your task is: … ● Take a focused history ● Interpret the data and ● Discuss management option … You have 10 minutes for this task (+ 2mins initial reading time). Please read the instruction to candidate. This clinical assessment task is to assess the skills of the candidate to take a focused history and organize appropriate investigations, reach a diagnosis and discuss the management options. They are expected only to organize transvaginal ultrasound, Beta HCG and progesterone at the outset. Show them the results of the investigations as they request them. Results Sheet A— ask them to interpret and arrange the next test Results Sheet B— Beta HCG Results Sheet C— Progesterone As the patient is asymptomatic, after due counselling, they should organize a repeat beta HCG in 48 hrs. Results Sheet D— Beta HCG (48 hrs after) As the beta HCG rise is suboptimal but more than 33%, the candidate may spontaneously or based on Zari’s wishes organize a repeat beta HCG and a repeat ultrasound. Results Sheet E— Beta HCG (48 hrs after Results Sheet D) Results Sheet F— Ask them to interpret and discuss the management options Record your overall clinical impression of the candidate for each domains (i.e. should this performance be pass, borderline, or a fail).
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Konferenzberichte zum Thema "PV park"

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Tao Li und Wenjing Wang. „Planning and designing of distributed PV of Suzhou Industrial Park“. In 2015 IEEE 42nd Photovoltaic Specialists Conference (PVSC). IEEE, 2015. http://dx.doi.org/10.1109/pvsc.2015.7356266.

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Cecati, Federico, Sante Pugliese, Rongwu Zhu und Marco Liserre. „Integration and Optimization of Voltage Active Filtering Functionality in a PV Park“. In IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2019. http://dx.doi.org/10.1109/iecon.2019.8926952.

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Dusa, Alexandru, Ciprian Daniel Balanuta, Gelu Gurguiatu und Adrian-Valentin Niculcea. „Reactive power compensation for a PV park connected at a long distance“. In 2019 6th International Symposium on Electrical and Electronics Engineering (ISEEE). IEEE, 2019. http://dx.doi.org/10.1109/iseee48094.2019.9136104.

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Moreno-Garcia, I. M., V. Pallares-Lopez, M. Gonzalez-Redondo, J. Lopez-Lopez, M. Varo-Martinez und I. Santiago. „Implementation of a real time monitoring system for a grid-connected PV park“. In 2015 IEEE International Conference on Industrial Technology (ICIT). IEEE, 2015. http://dx.doi.org/10.1109/icit.2015.7125528.

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Harsarapama, A., M. Korevaar, O. Isabella und M. Zeman. „Accuracy of irradiance measurement for a PV park versus the number of sensors“. In Optics for Solar Energy. Washington, D.C.: OSA, 2017. http://dx.doi.org/10.1364/ose.2017.rth2b.2.

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Islam, Gazi M. S., und Ahmed Al Durra. „LVRT capability improvement of a grid-connected PV park by robust sliding mode control“. In 2015 American Control Conference (ACC). IEEE, 2015. http://dx.doi.org/10.1109/acc.2015.7170864.

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7

Strzalka, Aneta, Md Zahid Hasan Siddiquee und Ursula Eicker. „Potential of roof top PV-systems for supplying electricity in residential area Scharnhauser Park“. In 2009 International Conference on the Developments in Renewable Energy Technology (ICDRET 2009). IEEE, 2009. http://dx.doi.org/10.1109/icdret.2009.5454212.

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8

Eldeeb, Hassan H., Abla O. Hariri und Osama A. Mohammed. „Coordinated control for the integration of a large scale electric vehicle park with PV into the MV grid“. In 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe). IEEE, 2017. http://dx.doi.org/10.1109/eeeic.2017.7977728.

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9

Zheng Wang, Shouting Fan, Yang Zheng und Ming Cheng. „Control of a six-switch inverter based single-phase grid-connected PV generation system with inverse Park transform PLL“. In 2012 IEEE 21st International Symposium on Industrial Electronics (ISIE). IEEE, 2012. http://dx.doi.org/10.1109/isie.2012.6237094.

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10

France, Todd, Eric Wiemers, Stephen E. Butterworth, Yahia Baghzouz und Robert F. Boehm. „Renewable Energy for Federal Land Management Agencies in Southern Nevada“. In ASME 2008 2nd International Conference on Energy Sustainability collocated with the Heat Transfer, Fluids Engineering, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/es2008-54230.

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The National Park Service, the U.S. Fish and Wildlife Service, and the USDA Forest Service governmental agencies in southern Nevada have collaborated with the Center for Energy Research at the University of Nevada, Las Vegas to explore the feasibility of becoming energy neutral by 2010. The three federal agencies have set a goal to offset their combined annual energy demand (currently supplied by local utility companies) with an equal amount of power produced by renewable energy sources. The study results indicate that the three federal agencies above consume just over 3,000 megawatt-hours of electrical energy per year in and around the Las Vegas Valley. Upon researching various types of renewable energy, it was determined that wind, geothermal, and biomass technologies either failed to have sufficient resources available in southern Nevada or conflicted with the resource management philosophies of the federal agencies. Solar energy is the most abundant feasible source of renewable energy within the study area, and it was determined that a 1.5 megawatt fixed photovoltaic (PV) system is best suited for this project.
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Berichte der Organisationen zum Thema "PV park"

1

Hobaica, Mark. Heritage Park Facilities PV Project. Office of Scientific and Technical Information (OSTI), September 2013. http://dx.doi.org/10.2172/1240618.

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2

Steen, M., L. Lisell und G. Mosey. Feasibility Study of Economics and Performance of Solar PV at the Atlas Industrial Park in Duluth, Minnesota. Office of Scientific and Technical Information (OSTI), Januar 2013. http://dx.doi.org/10.2172/1067932.

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3

Sinha, Parikhit, Garvin A. Heath, Andreas Wade und Keiichi Komoto. Human Health Risk Assessment Methods for PV, Part 1: Fire Risks. Office of Scientific and Technical Information (OSTI), Oktober 2018. http://dx.doi.org/10.2172/1492001.

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4

Sinha, Parikhit, Garvin A. Heath, Andreas Wade und Keiichi Komoto. Human Health Risk Assessment, Methods for PV, Part 2: Breakage Risks. Office of Scientific and Technical Information (OSTI), November 2019. http://dx.doi.org/10.2172/1603943.

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5

Sánchez Álvarez, Carlos, Anaiane Pereira Souza und Julián Andrés Castillo Vargas. Respuesta productiva de porcinos (pietrain × landrace) alimentados con una dieta compuesta de harina de maíz y girasol (66:34) frente a un concentrado comercial. Universidad Nacional Abierta y a Distancia, Dezember 2020. http://dx.doi.org/10.22490/ecapma.4048.

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Contextualización: la alimentación representa entre el 60 y 70% de los costos de un sistema de producción animal. Vacio del conocimiento: por lo tanto, se hace necesario el diseño de estrategias nutricionales de bajo costo y directamente en la propiedad para superar esta limitación. Propósito del estudio: el objetivo de este trabajo fue comparar las respuestas productivas de un concentrado experimental compuesto por harina de maíz y harina girasol (66:34) y la de un concentrado comercial, para la alimentación de cerdos en crecimiento. Metodología: fueron usados 10 machos castrados y cruzados Pietrain × Landrace de 12 kg de peso vivo inicial, los cuales fueron distribuidos aleatoriamente en dos grupos de 5 animales: el primer grupo fue sometido a una dieta control (DC, uso de concentrado comercial) y el segundo a una dieta experimental (DE, concentrado formado por 66% de harina de maíz y 34% de harina de girasol, preparado directamente en la propiedad). La comparación entre tratamientos se realizó usando un diseño completamente al azar mediante el paquete estadístico SAS y el nivel de significancia adoptado fue de P<0,05. Resultados y conclusiones: no se encontró diferencia estadística entre la dieta comercial (DC) y la experimental (DE) para el peso vivo (PV) inicial medio (DC = 12,2 vs DE = 12,1 kg; P = 0,388), sin embargo, si hubo diferencia para el PV final medio (DC = 65,5 vs DE = 62,9 kg; P < 0,01) y consumo díario de alimento (DC = 2,12 vs DE = 2,08 kg/día). El PV presentó una dinámica de aumento semejante entre las dos dietas en función del tiempo. Hubo diferencia estadística entre las dietas mencionadas para la ganancia diaria de peso (GDP; DC = 0,393 vs DE = 0,383 kg/día; P = 0,022), pero no para el índice de conversión alimentar (ICA; DC = 5,39 vs DE = 5,43; P = 0,545) entre los dos grupos de tratamientos. Por lo tanto, considerando los resultados anteriores, se puede concluir que el uso de una relación harina de maíz: harina de girasol (66:34) no genera respuestas productivas iguales o superiores a la alternativa comercial.
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6

Fox, Elise B., und Thomas B. Edwards. 2015 South Carolina PV soft cost and workforce development Part I. Initial survey results. Office of Scientific and Technical Information (OSTI), Mai 2016. http://dx.doi.org/10.2172/1252420.

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7

Meydbray, J., E. Riley, L. Dunn, K. Emery und S. Kurtz. Pyranometers and Reference Cells: Part 2: What Makes the Most Sense for PV Power Plants?; Preprint. Office of Scientific and Technical Information (OSTI), Oktober 2012. http://dx.doi.org/10.2172/1059158.

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8

Fox, Elise B., und Thomas B. Edwards. 2015 South Carolina PV Soft Cost and Workforce Development Part 2: Six Month Confirmation of Anticipated Job Growth. Office of Scientific and Technical Information (OSTI), Januar 2017. http://dx.doi.org/10.2172/1342716.

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