Analyzing Large-scale PV Plant Controllers by Technical Performance Indices using MCS Method

2021 ◽  
Author(s):  
Hooman Nasrazadani ◽  
Alireza Sedighi ◽  
Hossein Seifi
Keyword(s):  
Large Scale ◽  
Performance Indices ◽  
Technical Performance ◽  
Mcs Method

scholarly journals COMPARATIVE CHARACTERISTICS OF TECHNICAL ACTIONS IN COMPETITIVE COMBATS OF HAND-TO-HAND FIGHTERS

2020 ◽  
Vol 14 (4) ◽  
pp. 639-647
Author(s):  
A. H. Khasanov ◽  
Keyword(s):  
Research Result ◽  
Technical Skills ◽  
Technical Training ◽  
Methodological Framework ◽  
Highly Qualified ◽  
Performance Indices ◽  
Performance Factors ◽  
Technical Performance ◽  
Competitive Activity ◽  
Almost All

Introduction. The paper aims to present a generalized analysis of technical skills of highly-qualified hand-to-hand fighters in terms of new rules introduced at 2018 competitions. Materials and methods. The analysis of the technical preparedness of highly- qualified hand-to-hand fighters in terms of the new rules involved recording competitive fight videos. Obtained results were used to assess and analyze the level of technical skills of these sportsmen. Model characteristics of their technical actions according to the rules of 2014 and 2018 have been compared with an “ideal” mathematical model of technical preparedness of highly-qualified hand-to-hand fighters. Research result. Comparative analysis of technical preparedness of the sportsmen competing in handto-hand combats according to old and new rules indicates that changes in the rules have significantly affected the pattern of fights of highly-qualified athletes in general. Nowadays, athletes show a low index in almost all technical performance factors. Conclusion. The findings suggest that there is a decline in some performance indices of technical actions of athletes fighting according to the new rules of the competition compared to the performance of these technical actions according to the old rules. The technical performance is generally low, which is why there is a need to develop a new organizational and methodological framework for technical training in hand-to-hand combat. Keywords: hand to hand fighting, technical preparedness, competitive activity.

scholarly journals A multi-criteria decision making approach for public lighting system selection

2018 ◽  
Vol 184 ◽  
pp. 04006 ◽  
Author(s):  
Maria Cristea ◽  
Radu Adrian Tîrnovan ◽  
Ciprian Cristea ◽  
Constantin Sorin Pică ◽  
Cristian Făgărășan
Keyword(s):  
Large Scale ◽  
Software Tools ◽  
Technical Solution ◽  
Lighting System ◽  
Street Lighting ◽  
Lighting Technology ◽  
Technical Performance ◽  
The One ◽  
Technical Solutions ◽  
System Selection

There are numerous and different ways to design an energy efficient street lighting system, but not always the best technical solution is the optimal economic solution as well. In this paper, we used two distinct software tools in order to obtain the optimal technical and economic solution for selecting street lighting technology. The first software used was DIALux, which is frequently applied in this field, assisting designers in choosing the most appropriate electrical installations and evaluating the technical performance of the chosen solutions. This tool determined the street lighting system variants for which there are predetermined configurations, so that the lighting parameters obtained are in accordance with the normative requirements of the lighting classes in which the roadways are included. Different ways of locating the luminaires and other parameters were changed to reach the best version that meets the qualitative requirements of the lighting technology. The second software used was the one developed by the authors, based on ELECTRE III method, which evaluated the technical solutions returned by DIALux against several criteria, taking into account the designer’s preferences and constraints. The optimal technical and economic solution was obtained after ranking the variants by their performance at each criterion. The simulation experiment and the results returned suggested that the combination of the two software tools is comprehensive and effective and it can be used in this type of decisions at large scale.

Technology Outlook and Sustainability of the Synthetic Natural Gas Production Process Derived From Coal

2013 ◽  
Author(s):  
Orlando M. Ramirez ◽  
Lesme Corredor
Keyword(s):  
Natural Gas ◽  
Large Scale ◽  
Fossil Fuel ◽  
Sustainability Assessment ◽  
Energy Content ◽  
High Energy ◽  
Gas Production ◽  
Synthetic Natural Gas ◽  
Capital Costs ◽  
Technical Performance

Natural gas is the most environmental friendly fossil fuel with a high energy content and has a promising future within the energy consumption outlook. For this reason, its production from coal is gaining a significant interest, converting the most abundant, stable, and low price fossil fuel to synthetic natural gas (SNG). In this paper a technology outlook and a sustainability assessment of the technical, economical, and environmental factors is developed. It was found that the sustainability of the process depends mainly on the local price of coal and natural gas, as well as, emerging SNG technologies, also known as direct methanation. The conventional methanation process, the indirect methanation, has high capital costs but it is currently the only proven large scale technology. Although the emerging technology has not yet been tested at a commercial scale, it has a better technical performance with an net efficiency increase of more than 10 percent as results of the process stage reduction which should lead to lower capital costs requirements. Regarding the environmental performance, the conventional process produces large amounts of CO2, approximately 1.3 kg CO2 for each kg of coal, that has to be compressed and sequestered to meet the environmental targets.

scholarly journals Sandbag replacement systems – a nonsensical and costly alternative to sandbagging?

2020 ◽  
Vol 20 (1) ◽  
pp. 197-220
Author(s):  
Lena Lankenau ◽  
Christopher Massolle ◽  
Bärbel Koppe ◽  
Veronique Krull
Keyword(s):  
Applied Sciences ◽  
Large Scale ◽  
Research Programme ◽  
Technical Performance ◽  
Certification Tests ◽  
University Of Applied Sciences ◽  
Protection Systems ◽  
Repeated Use ◽  
Large Scale Tests ◽  
Second Use

Abstract. In addition to flood defence with sandbags, different sandbag replacement systems (SBRSs) have been available for a number of years. The use of sandbags is time-consuming as well as highly intensive in terms of materials and personnel. In contrast, SBRSs are reusable and require lower costs in terms of helpers and logistics, offsetting the comparatively higher initial investment costs through repeated use. So far, SBRSs have rarely been used in Germany in operational flood protection. The reasons lie in different financing modalities of investment, operational costs and low confidence in the technical performance of SBRSs. These problems are addressed by a research programme at the Institute of Hydraulic Engineering (IWA), City University of Applied Sciences, Bremen. A series of systematic large-scale tests of sandbag systems and SBRSs with a focus on functionality, stability and handling was carried out. The results showed that the majority of the SBRSs tested are able to provide protection comparable to that of sandbag systems but with a significantly reduced use of materials, simplified logistics and fewer helpers. Nevertheless, it is advisable to develop and perform well-defined certification tests for SBRSs, in order to define clear instructions for and to identify limits to the use of certain SBRSs. For example, not all systems work equally well on different surfaces. Supplementary to the practical tests, costs of the procurement and use of various sandbag systems and SBRSs were determined on the basis of realistic scenarios. This provides a methodology as well as concrete figures to cost the provision and use of different protection systems from a holistic perspective. It turns out that the higher investment costs of the SBRSs investigated compared to sandbag systems are already offset on the second use of the reusable systems.

scholarly journals Analysis of Photovoltaic & Battery Energy Storage System Impacts on Electric Distribution System Efficacy

2020 ◽  
Vol 12 (4) ◽  
pp. 1001-1015
Author(s):  
Kumari Kasturi ◽  
◽  
Chinmay Kumar Nayak ◽  
Ranjan Nayak ◽  
◽  
...  
Keyword(s):  
Power Supply ◽  
Distribution System ◽  
Power Loss ◽  
Power Flow ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Performance Indices ◽  
Battery Energy Storage ◽  
Technical Performance ◽  
Battery Energy

Uncertain nature of renewable energy sources like solar irradiation poses a serious concern of loss of power supply reliability. Battery energy storage (BES) system helps in improving system reliability by storing surplus energy generated and supplying the load in case of energy deficit. Thus BES allows improvement of microgrid performance and reduces operational cost by increasing the utilization of renewable energy sources. This paper presents an energy management strategy (EMS) to dictate the power flow among photovoltaic (PV) panels, BES and the load considering a proposed time-of-use (TOU) pricing as the control factor. Its efficacy in improving power supply reliability as well as power quality issues of a 69-bus radial distribution system (RDS) is evaluated from technical performance indices like power loss, voltage deviation index and security margin and economic performance considering costs of power import from the grid and active power loss and financial benefit from battery discharge. Grasshopper Optimization Algorithm (GOA), is used to optimize the sizes and placements of three PV-BES units to minimize an objective function aptly formulated combining the technical performance indices using weighted sum method. The results are contrasted against another two cases of with only PV and without PV and BES integration. Finally, the proposed system is analysed from economic perspective and the benefits obtained are compared. The results are evident of both technical and economic advantages of integrating both PV and BES units at optimal locations (load bus). The optimization results obtained from GOA have been compared with that from Genetic Algorithm (GA). GOA proves to be fast, effective and reliable in resolving power flow optimization problem.

scholarly journals Analysis of “Laboratory and Benchtop Performance of a Mealtime Insulin Delivery System”

2018 ◽  
Vol 12 (4) ◽  
pp. 828-830
Author(s):  
Eric Zijlstra
Keyword(s):  
Clinical Application ◽  
Large Scale ◽  
Performance Testing ◽  
Insulin Delivery ◽  
Test Results ◽  
Comprehensive Overview ◽  
Technical Performance ◽  
Device Development ◽  
Dose Accuracy ◽  
Bolus Insulin

In the current issue of Journal of Diabetes Science and Technology, Dreon et al give a comprehensive overview of the technical performance of a wearable patch for bolus insulin delivery. The test results generated by the manufacturer of the bolus-patch provide the technical prerequisites for clinical application. As the device received FDA clearance already in 2010, positive results from the nonclinical performance testing were to be expected, but present nevertheless interesting insights into the device development. The single-dose accuracy verification results seem especially promising, but tighter accuracy criteria could have been specified and information on outliers is missing from the analysis. The clinical application of the bolus-patch is currently under investigation in a large-scale 44-week intervention trial.

scholarly journals RESEARCH ON A GRAIN CULTISEEDER FOR SUBSOIL-BROADCAST SOWING

2021 ◽  
pp. 385-396
Author(s):  
I.L. Rogovskii ◽  
L.L. Titova ◽  
V.I. Trokhaniak ◽  
K.V. Borak ◽  
O.T. Lavrinenko ◽  
...  
Keyword(s):  
Drag Coefficient ◽  
Field Experiments ◽  
Experimental Studies ◽  
Process Efficiency ◽  
Performance Indices ◽  
Deviation Angle ◽  
Technological Parameters ◽  
Recovery Coefficient ◽  
Air Drag ◽  
Technical Performance

The paper presents the results of theoretical and experimental studies on determining process efficiency of subsoil-broadcast sowing by means of improving the diagram and determining the technological parameters of a cultiseeder tined coulter / opener. The design of a tined coulter, where seeds are fed to its right and left sub-coulter spaces through various seed pipes, has been suggested. A simulation model of the process of seed movement and deflection in the sub-coulter space has been suggested. As a result of the conducted experimental studies, the statistics of the air drag coefficient and the recovery coefficient, the deviation angle of a seed flight operating trajectory after its divergence from the theoretical one, have been found. Rational parameters of a separator-distributor have been determined. Field experiments have been conducted in order to compare agro-technical performance indices of the experimental coulter and a commercial one.

scholarly journals Economic Evaluation of Large-Scale Biorefinery Deployment: A Framework Integrating Dynamic Biomass Market and Techno-Economic Models

2020 ◽  
Vol 12 (17) ◽  
pp. 7126 ◽  
Author(s):  
Jonas Zetterholm ◽  
Elina Bryngemark ◽  
Johan Ahlström ◽  
Patrik Söderholm ◽  
Simon Harvey ◽  
...  
Keyword(s):  
Supply Chain ◽  
Economic Performance ◽  
Large Scale ◽  
Early Stage ◽  
Market Effects ◽  
Product Demand ◽  
Technical Performance ◽  
Study Results ◽  
End Use

Biofuels and biochemicals play significant roles in the transition towards a fossil-free society. However, large-scale biorefineries are not yet cost-competitive with their fossil-fuel counterparts, and it is important to identify biorefinery concepts with high economic performance. For evaluating early-stage biorefinery concepts, one needs to consider not only the technical performance and process costs but also the economic performance of the full supply chain and the impacts on feedstock and product markets. This article presents and demonstrates a conceptual interdisciplinary framework that can constitute the basis for evaluations of the full supply-chain performance of biorefinery concepts. This framework considers the competition for biomass across sectors, assumes exogenous end-use product demand, and incorporates various geographical and technical constraints. The framework is demonstrated empirically through a case study of a sawmill-integrated biorefinery producing liquefied biomethane from forestry and forest industry residues. The case study results illustrate that acknowledging biomass market effects in the supply chain evaluation implies changes in both biomass prices and the allocation of biomass across sectors. The proposed framework should facilitate the identification of biorefinery concepts with a high economic performance which are robust to feedstock price changes caused by the increase in biomass demand.

Remote care nearby

2010 ◽  
Vol 16 (6) ◽  
pp. 294-301 ◽  
Author(s):  
Miriam MR Vollenbroek-Hutten ◽  
Hermie J Hermens
Keyword(s):  
User Satisfaction ◽  
Large Scale ◽  
Muscle Activation ◽  
Evaluation Studies ◽  
Outcome Evaluation ◽  
Technical Performance ◽  
Muscle Activation Patterns ◽  
Feedback Strategies ◽  
Clinical Content ◽  
General Physical

A telemedicine application has a better chance of being accepted if the users can easily handle it and if the application fulfils the clinical needs of both patients and professionals. This requires a methodology for development in which three key matters need to be dealt with: (1) clinical content; (2) design; and (3) outcome. Concerning the clinical content, telemedicine services for patients with chronic disorders that aim to increase their level of functioning need to monitor aspects of the patient's functioning and provide adequate feedback about this. Promising parameters of functioning are related to general physical activity and muscle activation patterns. Providing adequate feedback requires choices about the content of the information, the modality of the feedback and its timing. Unfortunately, research into effective feedback strategies is still in its infancy. Concerning the design it appears that the different stakeholders involved speak different languages, that there is a lack of knowledge about aspects related to acceptance and a lack of good methods to define user requirements. Scenario-based requirements analysis is a promising technique to overcome these barriers. Concerning the outcome, evaluation of telemedicine services in everyday clinical practice has been mainly directed at measurement of technical performance and user satisfaction. Large scale clinical evaluation studies with multiple end points are needed. This development methodology with its three aspects was used for a myofeedback-based teletreatment service. This showed that telemedicine applications can be developed that have the potential to make health care more effective, efficient and accessible.

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