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Статті в журналах з теми "Efficiency indexes"
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Chambers, R., R. Fare, and S. Grosskopf. "EFFICIENCY, QUANTITY INDEXES, AND PRODUCTIVITY INDEXES: A SYNTHESIS." Bulletin of Economic Research 46, no. 1 (January 1994): 1–21. http://dx.doi.org/10.1111/j.1467-8586.1994.tb00575.x.
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Castellanos, M. T., M. C. Cartagena, F. Ribas, M. J. Cabello, A. Arce, and A. M. Tarquis. "Efficiency Indexes for Melon Crop Optimization." Agronomy Journal 102, no. 2 (March 2010): 716–22. http://dx.doi.org/10.2134/agronj2009.0286.
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Teixeira, Edmilson Costa, and Renato do Nascimento Siqueira. "Performance Assessment of Hydraulic Efficiency Indexes." Journal of Environmental Engineering 134, no. 10 (October 2008): 851–59. http://dx.doi.org/10.1061/(asce)0733-9372(2008)134:10(851).
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Vyskupaitis, Andrius. "EFFICIENCY ESTIMATION OF TRANSPORT COMPANIES' ACTIVITY." TRANSPORT 18, no. 2 (April 30, 2003): 61–65. http://dx.doi.org/10.3846/16483840.2003.10414067.
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In this article methodological subjects of activities efficiency research of the transport companies as well as other complex systems are analyzed. Methodically it is the most important to select estimation indexes of efficiency of searching object activities. After the system of indexes is formed, it is determined that it is more useful to use the system of technical economic indexes in order to estimate the level of efficiency of the activities of transport companies. It is so, because none of the separate indexes individually is able comprehensively to reflect the activities of transport systems or separate companies. Using the proposed method it is possible to research the great amount of objects according to numerous indexes. The main task is to form conditionally monolithic groups from the totality of objects. The level of activities of the objects in these groups should be similar. It would be possible to solve this task with the help of the image identification theory. The essence of this theory is to used necessary algorithm for the identification of searching objects signs. On this basis each object is reckoned in a certain monolithic objects group. Next step is the use of classification algorithms, which enable to classify the whole of searching objects. In this article you would fmd two main stages of classification problem solution. In the first stage the expansion of the objects into monolithic groups according to one of the indexes goes. The quality of this stage depends on the amount of the groups and on the selection of a concrete index. In the second stage the final objects expansion into monolithic groups according to the whole of selected technicaleconomic level indexes goes. Here is the manifold classification of the objects. Its results enable to determine the efficiency level of transport systems activities as well as to improve the quality of planning transport company's activities.
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Gomes, Luís M. P., Vasco J. S. Soares, Sílvio M. A. Gama, and José A. O. Matos. "Efficiency Drifts in Euronext Stock Indexes Returns." International Journal of Business 27, no. 2 (April 30, 2022): 1–17. http://dx.doi.org/10.55802/ijb.027(2).003.
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This paper intends to assess and test long-term memory in the Euronext stock indexes returns in the search for fractal dynamics that refute the random walk hypothesis. The Hurst exponents estimated through Rescaled-Range and Detrended Fluctuation Analysis evidence long memory in the form of persistence for all markets, with the exception of CAC 40 by the DFA. However, the Rescaled-Range Tests neither reject the absence of long dependency nor reject the existence of short dependency. On the contrary, the Fractional Differencing Test supports the presence of persistence in the PSI 20, ISE 20 and OBX indexes. This suggests that these markets are more prone to predictability, but also trends that may be unexpectedly disrupted by discontinuities, exhibiting dynamics incompatible with random walk behavior and providing evidence against the weak form of efficiency and validity of the asset pricing models.
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Hunstad, Michael, and Jordan Dekhayser. "Evaluating the Efficiency of “Smart Beta” Indexes." Journal of Index Investing 6, no. 1 (May 31, 2015): 111–21. http://dx.doi.org/10.3905/jii.2015.6.1.111.
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Demirel, Ender, and Mustafa M. Aral. "Performance of Efficiency Indexes for Contact Tanks." Journal of Environmental Engineering 144, no. 9 (September 2018): 04018076. http://dx.doi.org/10.1061/(asce)ee.1943-7870.0001431.
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Nowak, Janusz, and Wojciech Przystupa. "Methods for Asssessing Energy Efficiency of Grain Dryers." Agricultural Engineering 23, no. 2 (June 1, 2019): 39–47. http://dx.doi.org/10.1515/agriceng-2019-0015.
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AbstractThe article presents an algorithm for calculating selected energy assessment indexes for grain driers. Particular attention was paid to the conversion of the equations obtained for the operating conditions of the drying process into equations allowing the calculation of indexes for the standard drying conditions. The indexes obtained allow a proper comparison of dryers operating in varied atmospheric conditions, as well as humidity and temperature of the dried material.
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Yin, Ai Zhen. "Study on Economic Evaluation Index System of Oil–Gas Exploration Project." Advanced Materials Research 219-220 (March 2011): 1693–96. http://dx.doi.org/10.4028/www.scientific.net/amr.219-220.1693.
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The existing economic evaluation index system of oil-gas exploration project lacks environmental efficiency index and social efficiency index, and has no definite risk index. This paper analyzed the existing economic efficiency indexes, added the social efficiency and environmental efficiency indexes. These indexes can efficiently reflect the project’s difference, moreover, the data can be obtained easily. This paper designed the indexes, which can weight project geology risk, the project risk and the economic risk. These indexes composed a systematic and comprehensive system of oil-gas exploration project economic evaluation index. This index system can reflect the project characteristic from different angles, and provide the policy-making reference for the policy-maker.
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Sun, Boyang, Xiaohua Yang, Yipeng Zhang, and Xiaojuan Chen. "Evaluation of Water Use Efficiency of 31 Provinces and Municipalities in China Using Multi-Level Entropy Weight Method Synthesized Indexes and Data Envelopment Analysis." Sustainability 11, no. 17 (August 22, 2019): 4556. http://dx.doi.org/10.3390/su11174556.
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China’s water shortage problem is becoming increasingly severe. Improving water use efficiency is crucial to alleviating China’s water crisis. This paper evaluates the water use efficiency of 31 provinces and municipalities in China by using the data envelopment analysis (DEA) method. When the usual DEA model has too many indexes selected, it will cause the majority of the decision making units (DMUs) efficiency values be one, which leads to invalid evaluation results. Therefore, by using the entropy weight method, a new synthetic set of indexes is constructed based on the original indexes. The new synthetic set of indexes retains the full information of the original indexes, and the goal of simplifying the number of indexes is achieved. Simultaneously, by empowering the original indexes, the evaluation using synthetic indexes can also avoid the impact of industrial structure and labor division on water use efficiency. The results show that in China’s northeastern grain producing areas, water use efficiency is higher due to the high level of agricultural modernization. The provinces in the middle reaches of the Yangtze River have the lowest water use efficiency due to water pollution and water waste. In general, China’s overall water use efficiency is low, and there is still much room for improvement.
Дисертації з теми "Efficiency indexes"
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RUIU, PIETRO. "Energy Management in Large Data Center Networks." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2706336.
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In the era of digitalization, one of the most challenging research topic regards the energy consumption reduction of ICT equipment to contrast the global climate change. The ICT world is very sensitive to the problem of Greenhouse Gas emissions (GHG) and for several years has begun to implement some countermeasures to reduce consumption waste and increase efficiency of infrastructure: the total embodied emissions of end-use devices have significantly decreased, networks have become more energy efficient, and trends such as virtualization and dematerialization will continue to make equipment more efficient.
One of the main contributor to GHG emissions is data centers industry, which provision end users with the necessary computing and communication resources to access the vast majority of services online and on a pay-as-you-go basis. Data centers require a tremendous amount of energy to operate, since the efficiency of cooling systems is increasing, more research efforts should be put in making green the IT system, which is becoming the major contributor to energy consumption.
Being the network one of the non-negligible contributors to energy consumption in data centers, several architectures have been designed with the goal of improving energy-efficient of data centers. These architectures are called Data Center Networks (DCNs) and provide interconnections among the computing servers and between the servers and the Internet, according to specific layouts.In my PhD I have extensively investigated on energy efficiency of data center, working on different projects which try to tackle the problems from different views. The research can be divided into two main parts with the Energy Proportionality as connection argument.
The main focus of the work is about the trade-off between size and energy efficiency of data centers, with the aim to find a relationship between scalability and energy proportionality of data centers. In this regard, the energy consumption of different data center architectures have been analyzed, varying the dimension in terms of number of server and switches. Extensive simulation experiments, performed in small and large scale scenarios, unveil the ability of network-aware allocation policies in loading the the data center in a energy-proportional manner and the robustness of classical two- and three-tier design under network-oblivious allocation strategies.
The concept of energy proportionality, applied to the whole DCN and used as efficiency metric, is one of the main contributions of the work. Energy proportionality is a property defining the degree of proportionality between load and the energy spent to support such load, thus devices are energy proportional when any increase of the load corresponds to a proportional increase of energy consumption. A peculiar feature of our analysis is in the consideration of the whole data center, i.e., both computing and communication devices are taken into account. Our methodology consists of an asymptotic analysis of data center consumption, whenever its size (in terms of servers) become very large.
In our analysis, we investigate the impact of three different allocation policies on the energy proportionality of computing and networking equipment for different DCNs, including 2-Tier, 3-Tier and Jupiter topologies. For evaluation, the size of the DCNs varies to accommodate up to several thousands of computing servers. Validation of the analysis is conducted through simulations. We propose new metrics with the objective to characterize in a holistic manner the energy proportionality in data centers. The experiments unveil that, when consolidation policies are in place and regardless of the type of architecture, the size of the DCN plays a key role, i.e., larger DCNs containing thousands of servers are more energy proportional than small DCNs.
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Гузь, М. М., та Н. Воробей. "Оцінка ефективності банківської реклами". Thesis, Українська академія банківської справи Національного банку України, 2006. http://essuir.sumdu.edu.ua/handle/123456789/62114.
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SANTOS, Yuri Dantas dos. "Análise da eficiência dos gastos públicos municipais em ensino fundamental no seridó potiguar." Universidade Federal de Campina Grande, 2016. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1676.
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Diante da importância da educação na formação cidadã e profissional, faz-se necessário que os recursos empregados nessa área sejam utilizados de forma eficiente. Este trabalho procura responder ao seguinte problema de pesquisa: qual a eficiência dos municípios do Seridó Potiguar quanto aos seus gastos com educação no âmbito do ensino fundamental? A partir do qual, traçou-se como objetivo geral: analisar a eficiência dos gastos municipais em educação, no nível do ensino fundamental, no contexto do Seridó Potiguar. A pesquisa classificou-se como: descritiva, quanto aos objetivos; pesquisa documental, quanto aos procedimentos utilizados; e quantitativa, quanto à abordagem do problema. Os sujeitos da investigação foram os 25 municípios do Seridó – Rio Grande do Norte, referentes aos quais foram extraídos 14 indicadores, distribuídos em três dimensões alusivas: ao financiamento da educação, aos recursos educacionais não financeiros e ao desempenho do aluno. Por falta de dados, 5 municípios foram excluídos do estudo. Utilizando-se do método PROMETHEE II, de apoio multicritério à decisão, foram constituídos índices representativos de cada uma das três dimensões e índices que permitem visualizar a eficiência em educação sob quatro perspectivas distintas. Os resultados quanto ao Índice de Eficiência Bruta do Gasto com Educação (IEBGE) revelaram que os municípios mais eficientes em prover recursos educacionais não financeiros estiveram entre os últimos no financiamento do ensino fundamental. Por outro lado, os menos eficientes ficaram entre os primeiros no ranking do financiamento, revelando que somente aplicar recursos não torna o município eficiente. Quanto ao Índice de Eficiência Líquida do Gasto com Educação (IELGE), evidenciou-se que os municípios mais eficientes em conseguir desempenho de seus alunos ocuparam posições medianas no ranking do financiamento, indicando que a aplicação de recursos, em certa medida, é importante para que o município seja eficiente. Pelo Índice de Eficiência na Operacionalização dos Recursos Educacionais Não Financeiros (IEORENF), percebeu-se que municípios eficientes em ofertar tais recursos não necessariamente o são em termos de geri-lo de modo a proporcionar o aprendizado do discente. Por fim, no Índice de Eficiência Total do Gasto com Educação (IETGE), os municípios mais eficientes também ocuparam posições intermediárias no ranking do financiamento da educação, confirmando a inferência de que certa quantidade de gastos é benéfica à eficiência dos municípios, todavia, o principal está na forma como esses recursos são utilizados. Já os municípios menos eficientes estiveram entre os que mais financiaram o ensino fundamental, endossando a afirmativa de que somente efetuar gastos não melhora a eficiência. Acrescente-se que somente realizar gastos não melhora o desempenho do aluno, pois se identifica que estes mesmos municípios também são os últimos no ranking do desempenho do aluno. O estudo apresentou como limitação o fato de propor um novo modelo de indicadores, carecendo de uma maior aplicação a fim de ser validado. Por fim, propõe-se a replicação da pesquisa ampliando o espaço temporal e a quantidade de municípios, bem como a análise da influência de fatores externos sobre a educação.
Given the importance of education in civic and vocational training, it is necessary that the resources employed in this area are used efficiently. This paper seeks to answer the following research problem: what the efficiency of the municipalities of Seridó Potiguar about their spending on education within the elementary school? From which, if traced the general objective: to analyze the efficiency of municipal spending on education in the elementary school level, in the context of Seridó Potiguar. The survey ranked as descriptive, as the objectives; survey and documentary research, as the procedures used; and quantitative, on the approach to the problem. The subjects of the research were the 25 municipalities of Seridó - Rio Grande do Norte, concerning which were taken from 14 indicators, divided into three allusive dimensions: the financing of education, non-financial educational resources and student achievement. For lack of data, five municipalities were excluded. Using the PROMETHEE II method of multi-criteria decision support, were recognized representative indices of each of the three dimensions and indexes that let you see the efficiency in education from four perspectives distintas. Os results regarding the Expenditure Gross Efficiency Ratio with Education (EGERE) revealed that the most efficient municipalities in providing nonfinancial educational resources were among the last in the financing of primary education. On the other hand, the least efficient were among the first in the ranking of financing, revealing that only apply resources does not make efficient municipality. As for Expenditure Net Efficiency Ratio with Education (ENERE), it showed that the most efficient municipalities in achieving performance of his students occupied middle positions in the ranking of funding, indicating that the application of resources to some extent, it is important to that the municipality is efficient. The Efficiency Ratio in the Operationalization of Non-Financial Educational Resources (ERONFER), it was noted that efficient municipalities in offering such resources are not necessarily in terms of manage it to provide the learning of the student. Finally, in the Total Efficiency Index Spending on Education (TEISE), the most efficient municipalities also occupied intermediate positions in the ranking of education funding, confirming the inference that a certain amount of spending is beneficial to the efficiency of municipalities, however, the main is in how these resources are used. Already the least efficient municipalities were among the more funded elementary school, endorsing the statement that only make expenditures does not improve efficiency. Adding that only hold spending does not improve student achievement, as it identifies these same municipalities are also the last in the ranking of student performance. The study had as limitation the fact of proposing a new model of indicators, lacking a larger application in order to be validated. Finally, research replication is proposed extending the timeline and the number of municipalities, as well as the analysis of the influence of external factors on education.
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Caputo, Marina Maitto. "Avaliação de doze cultivares de laranja doce de maturação precoce na região sudoeste do Estado de São Paulo." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-16082012-081058/.
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É restrito o número de cultivares utilizado nos pomares comerciais, embora a diversidade de gêneros, espécies, cultivares e clones de citros seja grande. No entanto, o processamento industrial baseia-se em quatro cultivares principais, a Hamlin, como precoce, a Pêra como meia estação e a Natal e Valência como tardias. Alicerçada nestas quatro cultivares, o processamento industrial de sucos utiliza-se de frutos de junho a dezembro, com maior intensidade, e até fevereiro do ano seguinte quando a oferta diminui, sendo março a maio o período da entressafra. Por esse motivo, é de extrema importância selecionar cultivares que produzam nesse período. O objetivo, este trabalho foi avaliar o desempenho horticultural de doze cultivares de laranja doce de maturação precoce e identificar aquelas superiores à laranja Hamlin, com intuito de oferecer ao citricultor da região sudoeste do Estado de São Paulo, novas opções que produzam frutos de qualidade, tanto para fruta in natura como para processamento industrial e que tenham produção antecipada. As cultivares avaliadas foram Hamlin (cultivar precoce padrão), Westin, Pineapple, Rubi, Seleta Vermelha, Mayorca, Valência 2, Olivelands, Kawatta, IAPAR 73, Salustiana e Valência Americana. O delineamento experimental foi o inteiramente casualizado, com quatro repetições, compostas por três plantas de cada cultivar. Os dados referentes ao crescimento vegetativo (altura, diâmetro de planta e volume de copa), produção e eficiência produtiva, morfologia dos frutos (massa, largura, comprimento, tamanho, espessura da casca e número de sementes) e características de qualidade interna dos frutos (SST, acidez, porcentagem de suco, ratio, índice tecnológico, ácido ascórbico, índices de cor da polpa e da casca) foram coletados. As médias foram comparadas com a cultivar padrão Hamlin e analisadas pelo teste Dunnett. Para avaliar simultaneamente as características, foram aferidos os índices de desempenho para identificar cultivares promissoras que atendessem aos requisitos tanto para o processamento industrial como para o consumo in natura. Oliverlands foi a cultivar de laranja doce que registrou maior altura de planta e volume de copa, maior produção de frutos e maior eficiência produtiva em relação a cultivar Hamlin. Para o processamento industrial, a laranja Westin apresentou alto índice de desempenho enquanto que as laranjas Valência 2 e Salustiana registraram índices de desempenho favoráveis para consumo in natura. Não foram observados cultivares de laranja doce com dupla aptidão para o processamento industrial e consumo in natura na região sudoeste do Estado de São Paulo.The number of sweet orange cultivars used in commercial orchards in Brazil is restricted, although the diversity of genera, species, cultivars and clones of citrus is great. However, the industrial processing is based on four main cultivars, the \'Hamlin\', as early maturing, the \'Pera\', as mid-season, and \'Natal\' and \'Valencia\' as late maturing cultivars. Anchored on these four cultivars, the orange juice industry processes fruits from June through December with greater intensity, January and February with lower supply, and the period from March through May is considered off season. Therefore, it is extremely important to select varieties that produce during this period. The objective of this study was to evaluate the horticultural performance of twelve early maturing sweet orange cultivars and identify those better than the \'Hamlin\' sweet orange, aiming to offer new options for producing fruits with quality, as for fresh fruit market as for industrial utilization, during early citrus harvest season in the southwest region of São Paulo state. The cultivars \'Hamlin\' (early maturing standard cultivar), \'Westin\', \'Pineapple\', \'Ruby\', \'Seleta Vermelha\', \'Mayorca\', \'Valencia 2\', \'Oliverlands\', \'Kawatta\', \'IAPAR 73\', \'Salustiana\' and \'Valencia Americana\' were evaluated. The experimental design was completely randomized with four replications, consisting of three plants of each cultivar per plot. Data concerning vegetative growth (plant height, stem diameter and canopy volume), production and yield efficiency, fruit morphology (mass, width, length, size, shell thickness and number of seeds) and the characteristics of internal fruit quality (total soluble solids, acidity, percentage of juice, \"ratio\", technological index, ascorbic acid, color indexes of pulp and peel) were collected The averages were compared to \'Hamlin\' sweet orange (standard cultivar) and analyzed by Dunnett test. To evaluate the characteristics simultaneously, performance indexes were estimated for identifying promising cultivars for utilization as for juice industry as for consumption fresh fruit market. \'Oliverlands\' was the sweet orange cultivar which showed higher plant height and plant volume, higher production and yield efficiency as compared to \'Hamlin\' sweet orange. The cultivar \'Westin\' showed higher performance index for the industrialization process, whereas \'Valencia 2\' and \'Salustiana\' sweet oranges had adequate performance indexes for fresh fruit market. There was no cultivar of sweet orange that had the simultaneous ability for the juice industry and for fresh fruit market in the southwestern region of Sao Paulo state.
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Gomes, Kátia Teresinha Guerra. "Níveis de eficiência de mercados internacionais através da precificação de ações de empresas do setor de seguros." Pontifícia Universidade Católica de São Paulo, 2012. https://tede2.pucsp.br/handle/handle/1050.
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Previous issue date: 2012-10-22This dissertation aims at the study of 22 companies of the international insurance segment in order to ascertain whether insurers already consider in the price of its shares the expectations of future crises and also analyze which insurance market is more efficient. To this purpose, this work studied and presented results on the following aspects: a study of 20 companies of highest market value of the international insurance segment, verifying the performance of rolling stock of each comparing with the market index of the stock exchange on which the action is negotiated. Additionally, conducted an analysis between the Brazilian insurance markets and other markets studied in the sample, verifying if the insurance segment in Brazil presents itself more efficient than international markets surveyed; and third, and last, an analysis of the stock indexes out of reshaping crisis moments as selected sample. For this survey, the methodology which has been used was the study of events. According to the results observed in this work and except that the findings are limited to the sample observed, the results indicate the occurrence of the generation of statistically significant abnormal returns after the announcement of the crisis. For the windows immediately before and after the event window, was not observed to generate statistically significant abnormal returns. Thus, we accepted the null hypothesis, assuming indications anticipated adjustments, resulting from an accumulation of factors. The results comparison among companies of the 4 sub samples showed the absence of a default behavior for the series as a whole. And considering that economic crises are the result of continuous systemic adverse events, with the results published in the media, it is reasonable to accept that the prices gradually adjusted before the measurement point
A presente dissertação tem por objetivo o estudo do retorno das ações ordinárias de 22 empresas do segmento de seguros internacional a fim de verificar se elas já embutiram no preço de suas ações as expectativas de crises futuras e também analisar qual mercado segurador se apresenta mais eficiente. Para tanto, este trabalho estudou e apresentou resultados sobre os seguintes aspectos: um estudo das 20 empresas de maior Valor de Mercado que compõem o segmento de seguros internacional, verificando o desempenho evolutivo das ações de cada uma delas comparando com o índice de mercado da Bolsa de Valores na qual a ação é negociada. Adicionalmente, efetuou-se uma análise entre o mercado segurador brasileiro e os demais mercados estudados na amostra, verificando se o segmento de seguros no Brasil se apresenta mais eficiente que os mercados internacionais pesquisados; e em terceiro e último, uma análise dos índices bursáteis nos momentos das crises financeiras selecionadas como amostra. Para tal pesquisa, utilizou-se da metodologia de estudo de eventos. De acordo com os resultados observados nesse trabalho e ressalvado que as conclusões se limitam à amostra observada, conclui-se que os resultados evidenciaram a ocorrência da geração de retornos anormais estatisticamente significativos, após o anúncio da crise. Para as janelas imediatamente anteriores e posteriores a janela do evento, não foi observada a geração de retornos anormais estatisticamente significativos. Com isso, aceitou-se a hipótese nula, assumindo indícios de ajustes antecipados, resultantes de um acumulo de fatores. A comparação dos resultados entre as empresas das 4 sub amostras evidenciaram a inexistência de um comportamento padrão para a série como um todo. E ainda considerando que as crises econômicas são resultantes de uma continuidade de eventos sistêmicos adversos, com seus resultados divulgados na mídia, é admissível aceitar que os preços gradualmente se ajustaram antes do ponto de medição
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Подвальна, Н. Е., Н. Э. Подвальная та N. Podvalna. "Аналітичне обґрунтування ефективності функціонування готельних підприємств". Diss., Одеський національний економічний університет, 2014. http://dspace.oneu.edu.ua/jspui/handle/123456789/3705.
Повний текст джерелаАнотація:
У дисертаційній роботі досліджено теоретично-методичні аспекти функціонування готельних підприємств. Уточнено понятійний апарат за темою дослідження, систематизовано показники комплексного аналізу ефективності діяльності готельних підприємств. Проаналізовано сучасний стан і динаміку розвитку готельних підприємств України та Одеського регіону, визначено основні проблеми та перспективи розвитку. Апробовано методичний підхід до оцінки ефективності діяльності готельних підприємств з використанням багатовимірних статистичних методів, що дозволяє розмежувати сукупність готелів м. Одеса з метою індитифікації сильних та слабких сторін. Запропоновано для підвищення економічної ефективності готельного підприємства комплексний механізм на засадах процесного підходу, який складається з двох систем оцінки ефективності: системи операційного управління та системи стратегічного управління. Запропоновано основні етапи комплексного аналізу ефективності функціонування готельних підприємств: організаційний; оціночний; стратегічний; управлінський; контролюючий. Методика знайшла відображення в діяльності готельних підприємств та використовується для пошуку резервів підвищення ефективності діяльності.Диссертационное исследование направлено на теоретическое обоснование и усовершенствование методических аспектов анализа эффективности деятельности гостиничных предприятий на основе функционально-оценочных составляющих и разработку комплексного механизма обеспечения эффективного функционирования на принципах процессного подхода. В диссертационной работе исследованы теоретико-методические аспекты функционирования гостиничных предприятий. Уточнен понятийный аппарат по теме исследования. Предложено авторское определение понятия "эффективность", под которым, в отличие от существующих толкований, понимать степень достижения результата при оптимальном использовании ресурсов и расходов с учетом фактора времени, который дает возможность оценить эффективность деятельности предприятия в ретроспективе, текущем операционном цикле и в перспективе с целью принятия соответствующих управленческих решений. Предложена методика комплексной оценки эффективности гостиничных предприятий, в которой показатели объединены в две основные группы: функциональные и оценочные. Разработаны критериальные направления каждой из групп. В основу предложенной методики включены показатели, которые позволяют комплексно оценить эффективность функционирования гостиничных предприятий. Проанализировано состояние и динамика развития гостиничных предприятий Украины и Одесского региона за последние 13 лет, определены основные проблемы и перспективы развития. Обосновано использование определенных аналитических методов в оценке состояния, тенденций и направлений развития гостиничного хозяйства Украины, которые позволяют всесторонне изучить и охарактеризовать ситуацию, которая сложилась на предприятиях гостиничного хозяйства. Апробирован методический подход к оценке эффективности деятельности гостиничных предприятий с использованием многомерных статистических методов, что позволяет размежевать совокупность гостиниц г. Одесса с целью идентификации сильных и слабых сторон их деятельности. Предложен комплексный механизм, основанный на принципах процессного подхода, для повышения экономической эффективности гостиничного предприятия, который состоит из двух систем оценки эффективности: системы операционного управления и системы стратегического управления. Исследовано целесообразность использования взаимосвязи систематического анализа гостиничных предприятий с управленческим учетом, аудитом и информационно-коммуникационными технологиями. Предложены основные этапы комплексного анализа эффективности функционирования гостиничных предприятий: организационный; оценочный; стратегический; управленческий; контролирующий. Методика нашла отображение в деятельности гостиничных предприятий и используется для поиска резервов повышения эффективности деятельности.
In dissertation work it is investigational in methodical aspects of functioning of hotel enterprises. A concept vehicle is specified after the theme of research, systematized the indexes of complex analysis of efficiency of activity of hotel enterprises. The modern state and dynamics of development of hotel enterprises of Ukraine and Odessa region is analyses, certainly basic problems and prospects of development. It is approved methodical approach to the estimation of efficiency of activity of hotel enterprises with the use of multidimensional statistical methods, that allows to delimit the aggregate of hotels Odessa with the purpose of authentication strong and weak sides. A complex mechanism is offered for the increase of economic efficiency of hotel enterprise on principles of process approach, which consists of two systems of estimation of efficiency: operating control and strategic control system systems. The basic stages of complex analysis of efficiency of functioning of hotel enterprises are offered: organizational stage; evaluation; strategic; administrative; supervisory. A method found the reflection in activity of hotel enterprises and is used for the search of backlogs of increase of efficiency of activity.
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Беллауар, Абдеррахман. "Підвищення ефективності експлуатації компресорних станцій шляхом вдосконалення конструктивних елементів газоперекачувальних агрегатів". Thesis, Івано-Франківський національний технічний університет нафти і газу, 2010. http://elar.nung.edu.ua/handle/123456789/1968.
Повний текст джерелаАнотація:
Робота присвячена питанням удосконалення конструкцій елементів газоперекачувальних агрегатів (ГПА) з відцентровим нагнітачем (ЦБН)
компресорних станцій. Проаналізовані надійність ГПА, спосіб її підвищення і її зв'язок із залишковим ресурсом, а також вплив вібрації на технічний стан ГПА і можливості використання її для проведення діагностування і віброконтролю ГПА.
Виявлено інформаційні показники, за якими можна визначити технічний стан ГПА; розроблено метод самоорганізації моделей і отримано рівняння регресії; створено тривимірну параметричну комп'ютерну модель ЛУ; складено програму управління геометричними параметрами ЛУ; оптимізовано конструкцію
лабіринтного ущільнення ГПА з ВН за критерієм мінімального тиску в останньому зазорі ЛУ; проаналізовано дані по відмовах ГПА; побудовано графік залежності кількості нарядів на ремонт від часу, витраченого на ремонт (крива АВС); уточнено періодичність технічного обслуговування ГПА за їх поточним технічним станом на основі аналізу АВС і з використанням комп'ютерних баз даних.The present thesis is devoted to the problems of improving the design elements of the gas-pumping units (GPU) with centrifugal compressor (CC) of compressor stations. The reliability of GPU, methods of its improvement and its connection with residual life, as well as influence of vibration on technical state of GPU and potential for its use aiming at GPU diagnosis and vibration-based diagnostics are analyzed. Information indexes to determine technical state of GPU are exposed; method of selforganization of models and regression equation are obtained; three-dimensional parametric computer model labyrinth seal is created; the program to manage geometries of labyrinth seal is made; construction of GPU with CC labyrinth seal on the criterion of the least pressure in the last gap is optimized; information on the malfunctions of GPU is analyzed; dependence of the repair work orders amount on the time expanded on the repair (ABC curve) is diagrammed; periodicity of maintenance of GPU on their current technical state based on the analysis of ABC and with a use of computer databases is specified.
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RAGAZZI, Fernanda Gi?como. "Determina??o dos indicadores de efici?ncia econ?mica, composi??o dos custos de produ??o e principais ?ndices zoot?cnicos em propriedades leiteiras na regi?o Norte Fluminense." Universidade Federal Rural do Rio de Janeiro, 2014. https://tede.ufrrj.br/jspui/handle/jspui/1627.
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The dairy cattle exploration in Brazil is an important activity in the economic and social development process of the country. The aim of this study was to analyze production indices: birth rate, calving interval, service period and milk production, as well as, indicators of economic efficiency: crude margin, net margin and result (profit or loss) and the composition of production costs of 20 dairy farms in the Norte Fluminense. Were determined the components of the production costs: operating cost, effective operational cost and total cost. The dairy farms obtained the following averages for production indices: birth rate of 57.4 ? 12.18% with a coefficient of variation of 21.22%, calving interval of 13.5 ? 0.68 months with a coefficient of variation 5.05%, period of 116.2 ? 9.23 days service with a coefficient of variation of 7.95% and milk production of 6.1 ? 2.58 liters per day with a coefficient of variation of 41.96 %. Average crude margin of R$ 32,514.51 ? R$ 20,905.58 with a coefficient of variation of 64.30% and an average net margin of R$ 29,239.05? R$ 20,840.88 with a coefficient of variation of 71.28% was found, and producers remain in business in the short term is possible pay the actual operating cost. And result (loss), on average - R$ 124,050.95 ? R$ 27,757.68 with a coefficient of variation of 22.38%. By presenting injury, revenues does not remunerate investment, ie, the financial fixed assets in equity as land, improvements and so on. The low production indicex regarding the birth rate and milk production must be improved to obtain higher revenues in the activity and better milk production. The highest percentage of participation in the composition of revenue and the costs of investment was the asset value when recorded, and the sale of milk and the purchase of animals, respectively, when not accounted for this item. Regarding expenses with funding, the highest percentages were related to labor, grazing, concentrated feed and roughage supplementation. Producers remain analyzed short-term activity, but for improvement in production should be production indices with greater use of technical assistance for the return on economic efficiency.
A explora??o da bovinocultura de leite no Brasil constitui importante atividade no processo de desenvolvimento econ?mico e social do Pa?s. O objetivo do presente trabalho foi analisar os ?ndices zoot?cnicos: taxa de natalidade, intervalo de partos, per?odo de servi?o e produ??o de leite, bem como, os indicadores de efici?ncia econ?mica: margem bruta, margem l?quida e resultado (lucro ou preju?zo) e a composi??o dos custos de produ??o de 20 propriedades leiteiras na regi?o Norte Fluminense. Foram determinados os componentes do custo de produ??o: custo operacional, custo operacional efetivo e custo total. As propriedades leiteiras obtiveram as seguintes m?dias para os ?ndices zoot?cnicos: taxa de natalidade de 57,4 ? 2,18% com coeficiente de varia??o de 21,22%, intervalo de partos de 13,5 ? 0,68 meses com coeficiente de varia??o de 5,05%, per?odo de servi?o de 116,2 ? 9,23 dias com coeficiente de varia??o de 7,95% e produ??o de leite de 6,1?2,58 litros por dia com coeficiente de varia??o de 41,96%. Foi encontrada margem bruta m?dia de R$ 32.514,51 ? R$ 20.905,58 com coeficiente de varia??o de 64,30% e margem l?quida m?dia de R$ 29.239,05 ? R$ 20.840,88 com coeficiente de varia??o de 71,28%, permitindo aos produtores permanecerem na atividade no curto prazo sendo poss?vel o pagamento do custo operacional efetivo. E resultado (preju?zo) na m?dia de - R$ 124.050,95 ? R$ 27.757,68 com coeficiente de varia??o de 22,38%. Por apresentar preju?zo, a receita obtida n?o remunera o investimento realizado, ou seja, o ativo financeiro imobilizado em patrim?nio como terras, benfeitorias e etc. Os baixos ?ndices zoot?cnicos referentes ? taxa de natalidade e produ??o de leite devem ser melhorados para obten??o de maiores receitas na atividade e melhor produ??o de leite. A maior porcentagem de participa??o na composi??o das receitas e nas despesas de investimento foi o valor imobilizado, quando contabilizado, e a venda do leite e a compra de animais, respectivamente, quando n?o contabilizado, o valor imobilizado. Com rela??o ?s despesas com custeio, as maiores porcentagens foram referentes ? m?o de obra, a pastagem, a alimenta??o concentrada e a suplementa??o volumosa. Os produtores analisados permanecem no curto prazo na atividade, por?m para aumentar a produ??o devem ter melhorados os ?ndices zoot?cnicos com maior utiliza??o da assist?ncia t?cnica para obten??o de maior retorno de efici?ncia econ?mica.
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Мазур, І. М. "Управління використанням виробничих потужностей як фактор підвищення ефективності нафтогазовидобувних підприємств". Thesis, Івано-Франківський національний технічний університет нафти і газу, 2008. http://elar.nung.edu.ua/handle/123456789/4253.
Повний текст джерелаАнотація:
Дисертаційна робота присвячена дослідженню ефективності функціонування виробничих систем, економічного змісту та особливостей оцінки ефективності виробництва і виробничої потужності нафтогазовидобувних підприємств. На основі проведеного дослідження обгрунтовано та запропоновано механізм функціонування нафтогазовидобувних підприємств у системі ринкових відносин. Проаналізовано природно-сировинну базу та формування виробничих потужностей нафтогазовидобувних підприємств Західного нафтогазоносного регіону, ефективність їх використання та стан технічного і ремонтного обслуговування свердловин. Досліджено роль регулювання виробничої потужності у системі управління ефективністю виробництва, обґрунтовано ефективність запровадження системи планово-попереджувальних ремонтів свердловин, проведено оцінку ефективності організаційно-технологічних заходів при регулюванні виробничих потужностей в умовах інформаційної економіки, теоретично обґрунтовано визначення технологічної та економічної ефективності методів відновлення продуктивності свердловин.В диссертации изучены условия повышения эффективности деятельности производственных систем, экономический смысл и особенности оценки эффективности производства и производственной мощности нефтегазодобывающих предприятий, подтвержден и проанализирован механизм функционирования нефтегазодобывающих предприятий в системе рыночных отношений. Определено, что предприятие является открытой системой, которая может существовать при условии активного взаимодействия с внешним окружением. Оно получает из окружения производственные факторы и превращает их в блага и отходы, которые возвращает во внешнее окружение. Разработано систему показателей на основе призмы эффективности, которая разрешает конкретизировать важные составляющие стратегии предприятия, его бизнес-процессов и возможностей, которые необходимо анализировать с целью управления для осуществления желаний всех заинтересованных субъектов. Система показателей, построенная на принципах призмы эффективности, может использоваться и в случае анализа и регулирования локальной эффективности при концентрации на определённой стороне или основном бизнес-процессе. В результате проведённого исследования дано определение проектному, нормативному и практическому показателям производственной мощности, установлено соотношение между ними, а также плановыми и фактическими показателями. Разработанная система показателей эффективности проведения ремонтных работ будет использована при разработке методики определения эффективности внедрения планово-предупредительных ремонтов в скважинах и технологической эффективности использования производственных мощностей. Между нефтегазодобывающими предприятиями, государственными и местными органами власти возникает «конфликт интересов». Комплексное решение которого в пределах государства или региона воплощается в разработке региональных и промышленных программ развития нефтегазового комплекса. Сегодня состоялись внешние и внутренние экономические условия для пересмотра возможности использования скважин, которые находятся в консервации, бездеятельности и контрольных скважин. Существует перспектива вовлечения в разработку небольших месторождений. Резервом наращивания производственных мощностей является вовлечение в разработку месторождений, эксплуатация которых прекращена, но имеются значительные локальные остатки нефти или газа. Существенным резервом служит осуществление работ по уплотнению сети добывающих скважин на месторождениях с нестойкими породами, где ликвидация скважин обусловлена геологическими причинами. Рост цен на нефть и газ на мировом рынке, усовершенствование методов интенсификации добычи, геофизических исследований разрешают вовлекать в разработку скважины, которые ликвидировались через незначительные дебиты, за счёт углубления, перехода на другие продуктивные горизонты. Это обеспечит более полное извлечение тяжело добываемых запасов нефти и газа. Для нефтегазодобывающего предприятия предложено систему регулирования эффективности производства за результатами, которых следует достичь, поскольку это разрешает выполнять директивы вертикально интегрированной компании. Предложено механизм регулирования эффективности производства полнотой использования производственной мощности, разработано трехуровневую систему показателей для оценки эффективности функционирования предприятия, определения производства и процесса для регулирования. Предложено целевую функцию, которая используется для оценки эффективности производства. Использование целевой функции разрешает выбирать наиболее эффективный вариант внедрения проектов по регулированию производственной мощности по месторождений и залежей. Разработано алгоритм определения экономической эффективности работ, которые проводятся в скважинах и влияют на технологические или экономические характеристики их работы. Осуществлено классификацию инноваций в добыче нефти и газа по объектам и направленны влияния, что позволило разработать системную методику их оценки. Разработан алгоритм определения сравнительной и абсолютной эффективности внедрения инноваций в производство для разных вариантов, предусматривающих и не предусматривающих увеличение добычи нефти. Предложено систему показателей для изучения экологической составляющей при внедрении технико-технологических инноваций в производство и расчёта экономической эффективности природоохранных мероприятий.
Dissertation is devoted to research the efficiency of the production systems functioning, economic essence and special features of the producing efficiency and production capacity of the enterprises. The mechanism of functioning of oil and gas output enterprises is analysed on the basis of the conducted research in the system of market relations. The oil and gas resources and forming of production capacities of enterprises in the Western region were studied, and efficiency of their use and mining holes technical and repair maintenance were analyzed in the dissertation too. The role of adjusting of production capacity was explored for the efficiency of the producing managing, introduction of the system of planned-preventive repairs of mining holes was recommended as the way of the increase of the producing efficiency. The efficiency of the organizational technological projects was explored. The methods of determination of technological efficiency and economic efficiency were adapted for intensification of oil and gas output, and for renewal of mining holes productivity too.
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Verney, Steven P. "Pupillary responses index : information processing efficiency across cultures /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2000. http://wwwlib.umi.com/cr/ucsd/fullcit?p9992386.
Повний текст джерелаКниги з теми "Efficiency indexes"
1
Froot, Kenneth. New trading practices and short-run market efficiency. Cambridge, MA: National Bureau of Economic Research, 1990.
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Cassese, Gianluca. Modelling the MIB30 implied volatility surface: Does efficiency matter? [St. Louis, Mo.]: Federal Reserve Bank of St. Louis, 2005.
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Library of Congress. Congressional Research Service, ed. Program trading: Efficiency and volatility in the securities markets. Washington, D.C: Library of Congress, Congressional Research Service, 1987.
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Appleby, John. A measure of effectiveness?: A critical review of the NHS Efficiency Index. Birmingham: National Association of Health Authorities and Trusts, 1996.
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Morck, Randall. The mysterious growing value of S&P 500 membership. Cambridge, MA: National Bureau of Economic Research, 2001.
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Library of Congress. Congressional Research Service, ed. Program trading: Participation in index arbitrage. Washington, D.C: Congressional Research Service, Library of Congress, 1986.
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Winch, Kevin F. Program trading: Public policy aspects of index arbitrage : a report. Washington: U.S. G.P.O., 1987.
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Trost, Barry M. Cumulative Indexes: Selectivity, Strategy and Efficiency in Modern Organic Chemistry. Elsevier Science & Technology Books, 1992.
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Wright, A. G. The optical interface to PMTs. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780199565092.003.0003.
Повний текст джерелаАнотація:
The optical interface between a light source and a detector is important. In most practical realizations the aim should be to collect the maximum light possible. Lens systems seldom do this efficiently, especially where the light source is diffuse. Underlying any attempt at concentrating or guiding light is subject to a fundamental limitation referred to as étendue (phase space cannot be squeezed). Light collection from small volume scintillators of high refractive index may approach 50 %, while collection from large-area scintillators is typically less than a few per cent. Incorporation of wavelength-shifting light guides and fibres leads to enhanced performance. Efficiency measurements by the author in terms of photoelectrons per keV are presented for selected configurations. Optical recycling derived from total internal reflection provides enhancement in effective quantum efficiency by a factor of up to 10. Concepts such as escape cones, adiabatic light guides, and trapped light are covered in detail.
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John, Choong. 6 Expedited Proceedings: (SIAC RULE 5). Oxford University Press, 2018. http://dx.doi.org/10.1093/law/9780198810650.003.0006.
Повний текст джерелаАнотація:
One of the criticisms against international arbitration is its occasional failure to live up to its potential for the expeditious resolution of disputes. Indeed, there is a tension at the core of modern international arbitration. On the one hand, parties seek speedy, cost-efficient, and final dispute resolution; while on the other hand, the absence of an appeal mechanism for arbitral awards generates a perceived need for exhaustive analysis of every fact and conceivable argument and for the retention of the ‘best’ (and therefore the busiest) lawyers and arbitrators, creating an attendant risk of ever-longer and more expensive arbitration proceedings. This chapter discusses the SIAC's rules designed to achieve expedition and cost-efficiency in all cases. These include Rule 5.1 on circumstances in which the expedited procedure may be appropriate, and Rule 5.2 covering the SIAC expedited procedure.
Частини книг з теми "Efficiency indexes"
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Nicola, PierCarlo. "Inequality and Poverty Indexes." In Efficiency and Equity in Welfare Economics, 17–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-30071-4_3.
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Färe, Rolf, Shawna Grosskopf, and Pontus Roos. "Integrating Consumer Satisfaction into Productivity Indexes." In Efficiency in the Public Sector, 201–17. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4757-3592-5_8.
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Pastor, Jesús T., and C. A. Knox Lovell. "Local Circularity of Six Classic Price Indexes." In Advances in Efficiency and Productivity II, 107–23. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-41618-8_7.
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Kalabin, Alexandr, and Evgeniya Bobrova. "Using Polar Indexes to Improve the Efficiency of Regional Management." In Digital Technologies in Teaching and Learning Strategies, 187–96. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-05175-3_19.
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Bibbo, D., S. Conforto, I. Bernabucci, M. Schmid, and T. D’Alessio. "A wireless integrated system to evaluate efficiency indexes in real time during cycling." In IFMBE Proceedings, 89–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-89208-3_23.
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Conforto, S., S. A. Sciuto, D. Bibbo, and A. Scorza. "Calibration of a measurement system for the evaluation of efficiency indexes in bicycle training." In IFMBE Proceedings, 106–9. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-89208-3_27.
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Dorta, Rafael Gomez, Omar Bonerge Pineda Lezama, Nelson Alberto Lizardo Zelaya, Noel Varela Izquierdo, and Jesus Silva. "Recommendation of Energy Efficiency Indexes for the Coffee Sector in Honduras Using Multivariate Statistics." In Lecture Notes in Electrical Engineering, 123–33. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5558-9_13.
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Ori, Ottorino. "Topological Efficiency Index." In New Frontiers in Nanochemistry, 437–45. Includes bibliographical references and indexes. | Contents: Volume 1. Structural nanochemistry – Volume 2. Topological nanochemistry – Volume 3. Sustainable nanochemistry.: Apple Academic Press, 2020. http://dx.doi.org/10.1201/9780429022944-38.
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"Cost-Efficiency Farrell Indexes." In Encyclopedia of Quality of Life and Well-Being Research, 1320. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-0753-5_100779.
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"Productivity Indexes: Part 1." In Measurement of Productivity and Efficiency, 96–142. Cambridge University Press, 2019. http://dx.doi.org/10.1017/9781139565981.006.
Повний текст джерелаТези доповідей конференцій з теми "Efficiency indexes"
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SU, Jian, Wenrui HUANG, Xiaoyun QU, Tao ZHANG, Lei WANG, Shuangqing XU, Xing YAN, and Junhua MA. "Analysis of Energy Efficiency Evaluation Indexes for Energy Internet." In 2019 IEEE Sustainable Power and Energy Conference (iSPEC). IEEE, 2019. http://dx.doi.org/10.1109/ispec48194.2019.8975189.
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Wang, Jiang-Jiang, You-Yin Jing, Chun-Fa Zhang, and Guo-Hua Shi. "Evaluation Indexes and Methods of Energy-Efficient Buildings." In ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/es2009-90041.
Повний текст джерелаАнотація:
The energy consumption in the world and the environment protection impel more attention to the energy-efficient building. This paper briefly introduced the energy consumption of buildings and the endeavor to improve energy efficiency in buildings in China. The evaluation indexes for energy-efficient buildings are reviewed and they would be obtained in different ways in the lifecycle of buildings. Then the evaluation methods or systems for energy-efficient buildings are presented. It can be found that the evaluation systems are prosperously developed and the evaluations in all lifecycle of the buildings is helpful to establish the policy, encourage governments, producers and users active actions and decrease the energy consumption in buildings in the future.
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Volochiy, Bohdan, Leonid Ozirkovskyy, Oleksandr Shkiliuk, and Volodymyr-Myron Miskiv. "Research of efficiency indexes of radio telemetry system with short-term use." In 2018 14th International Conference on Advanced Trends in Radioelecrtronics, Telecommunications and Computer Engineering (TCSET). IEEE, 2018. http://dx.doi.org/10.1109/tcset.2018.8336425.
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Shirvanian, Marcel, and Wolfram Lippe. "Efficiency increase of fuzzy query languages by using indexes for selected operations." In 2009 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE). IEEE, 2009. http://dx.doi.org/10.1109/fuzzy.2009.5277125.
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Ji, Zhuoran, and Xiaoguang Yang. "Comprehensive Evaluation Method of Signalized Intersection in View of Multiple Efficiency Indexes." In 17th COTA International Conference of Transportation Professionals. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784480915.386.
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Zhanxin, Ma, Ma Wenlu, and Cao Li. "An efficiency analysis of Chinese commercial banks by using Malmquist productivity indexes." In 2013 International Conference of Information Technology and Industrial Engineering. Southampton, UK: WIT Press, 2013. http://dx.doi.org/10.2495/itie131232.
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Tian, Yuzhen, and Zhanxin Ma. "An Efficiency Analysis Of Chinese Coal Enterprises By Using Malmquist Productivity Indexes." In 2016 International Conference on Advances in Energy, Environment and Chemical Science. Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/aeecs-16.2016.16.
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Ghabri, Issam, Ladjel Bellatreche, and Sadok Ben Yahia. "Energy Efficiency vs. Performance of Analytical Queries: The case of Bitmap Join Indexes." In 2021 IEEE International Conference on Big Data (Big Data). IEEE, 2021. http://dx.doi.org/10.1109/bigdata52589.2021.9671307.
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Li, Wei. "Experimental Studies of Shell and Tube Condenser Fouling and Accelerated Particulate Fouling in Internal Helical-Rib Roughness Tubes." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47404.
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This paper addresses fouling in a family of seven 15.54 mm I.D. copper, helically ribbed tubes, which have different ridge heights, helix angles, and number of ridge starts. A series of semi-theoretical linear fouling correlations as a function of the product of area indexes and efficiency indexes for long term combined precipitation and particulate fouling (PPF) in cooling tower systems and a series of semi-theoretical linear fouling correlations as a function of the efficiency indexes for particulate fouling were developed. The correlations can be directly used to assess the fouling potential of enhanced tubes in actual cooling water situations.
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Qinglin, Cheng, Ma Yanxin, Yang Jinwei, Pan Chenlin, Gan Yifan, and Liu Yang. "Establishment of Exergy Consumption Evaluation System and Analysis of Energy Efficiency for Crude Oil Pipeline Transportation System." In ASME 2019 Asia Pacific Pipeline Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/appc2019-7608.
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Abstract In order to establish a comprehensive exergy consumption evaluation system for crude oil pipeline transportation system, this paper proposed the definition and calculation method of unavoidable exergy loss based on the exergy analysis method and basic process of pipeline transportation. Then combined with the exergy flow classification, the exergy consumption index set was established and selected with correlation coefficient method. Furthermore, the exergy consumption evaluation index system was established including four hierarchies of object, intensity, efficiency and target using analytic hierarchy process and the weight of each part was calculated. Finally by means of all the exergy consumption indexes, the status of using energy was analyzed and evaluated. The analysis results showed that optimizing the transportation amount and temperature, energy efficiency could be improved. The evaluation system of exergy consumption established in this paper could improve operation efficiency and reduce energy consumption.
Звіти організацій з теми "Efficiency indexes"
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John F. Schabron, Jr Joseph F. Rovani, Francis P. Miknis, and Thomas F. Turner. RESIDUA UPGRADING EFFICIENCY IMPROVEMENT MODELS: WRI COKING INDEXES. Office of Scientific and Technical Information (OSTI), June 2003. http://dx.doi.org/10.2172/821180.
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Giebink, Noel. LOW REFRACTIVE INDEX OLEDS FOR PRACTICAL HIGH-EFFICIENCY OUTCOUPLING. Office of Scientific and Technical Information (OSTI), July 2022. http://dx.doi.org/10.2172/1877182.
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Arias, Karla, Segundo Camino-Mogro, Mariana Weiss, David Matías, Yuri Daltro, Franco Carvajal, and Michelle Carvalho Metanias Hallack. Measuring the Efficiency in Energy Distribution Firms in LAC: A Service Provision and Financial Performance Approach. Inter-American Development Bank, December 2022. http://dx.doi.org/10.18235/0004547.
Повний текст джерелаАнотація:
This study identifies and analyzes the evolution of efficiency in providing services and in the financial performance of the LAC electricity distribution companies between 2014-2020. In addition, it examines firms characteristics that might be related to efficiencies, such as quality of service, corporate governance, firm size, and ownership. This paper uses a twostep procedure. First, it considers the efficiency levels and the total factor productivity (TFP) changes using the Malmquist index and breaks down the total change by relying on a nonparametric data envelopment analysis (DEA) approach. The second stage focuses on the drivers of efficiency obtained in the first stage using the Tobit technique. The main results suggest that there is no significant improvement in the levels of efficiency in the period analyzed in the energy distribution firms in LAC. When analyzing the heterogeneity of a company's efficiency, the evidence shows a relation between companies efficiency and the quality perceived by users, higher efficiency is related to better-perceived quality. Besides, companies characteristics, such as firm size, corporate governance, and ownership, are related to the heterogeneity of efficiency.
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Noh, Jaesun, Robert Engle, and Alex Kane. A Test of Efficiency for the S&P Index Option Market Using Variance Forecasts. Cambridge, MA: National Bureau of Economic Research, November 1993. http://dx.doi.org/10.3386/w4520.
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Nin Pratt, Alejandro, and Héctor Valdés Conroy. After the Boom: Agriculture in Latin America and the Caribbean. Inter-American Development Bank, December 2020. http://dx.doi.org/10.18235/0002955.
Повний текст джерелаАнотація:
The convergence of a favorable macroeconomic environment and high prices of primary commodities between 2000 and 2011 contributed to the best performance of agriculture in Latin America and the Caribbean (LAC) since the 1980s, with steady growth of total factor productivity (TFP) and output per worker and a reduction in the use of input per worker. The end of the upward phase of the commodity cycle in 2011 together with less favorable external markets and a deterioration of the policy environment in several countries, motivates us to revisit the situation of agriculture in LAC in recent years to analyze how these changes have affected its performance. This study applies a framework that uses index numbers together with data envelopment analysis (DEA) to estimate levels of productivity and efficiency, incorporating technical change together with technical (TE) and environmental efficiency (EE) into the decomposition of TFP. The EE index adjusts the TFP measure for pollution, treating GHG emissions as a by-product of the desired crop or livestock outputs. TFP and efficiency of crop and livestock sub-sectors was calculated for 24 LAC countries from 2000 to 2016. Our results show that the period of fast agricultural growth in LAC, driven by technical change and resource reallocation, transformed agriculture in the region leaving it in a better position to cope with the more unfavorable regional macroeconomic environment and the less dynamic global markets observed after 2011.
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Spencer, Thomas E., Elisha Gootwine, Arieh Gertler, and Fuller W. Bazer. Placental lactogen enhances production efficiency in sheep. United States Department of Agriculture, December 2005. http://dx.doi.org/10.32747/2005.7586543.bard.
Повний текст джерелаАнотація:
The key objectives of this BARD project were to: (1) study long-term effects of immunization of prepubertal ewes against recombinant ovine placental lactogen (roPL) on subsequent birth weights of their lambs and their milk production; (2) optimize the anti-roPL immunization protocol using adjuvant preparations acceptable to producers and regulatory agencies; and (3) determine the physiological mechanism(s) whereby immunization against oPL increases fetal growth and development and mammogenesis. These objectives were based on key findings from a previous BARD project that: (a) immunization of ewes against roPL increased lamb birth weight and ewe milk production during lactation; (b) roPL and recombinant ovine growth hormone (roGH) increased the proliferation and differentiated function of endometrial glands that, in turn, would enhance uterine secretions necessary for fetal and placental growth; and (c) exogenous roPL and roGH stimulated mammogenesis and milk production during lactation. The BARD projects address central problems in sheep production, including reproductive failure due to embryonic/fetal mortality, low birth weight of lambs especially in prolific breeds, and reduced milk yields which affect neonatal survival. The sheep placenta secretes both lactogenic (oPL) and somatogenic (oGH) hormones. The receptors for those hormones are present in the fetus and placenta as well as maternal uterus, and mammary gland. Our research has focused on determining the biological role of these placental hormones in development and differentiation of the uterus during gestation and the mammary gland during pregnancy and lactation. Studies conducted in the current BARD project indicated that the effects of anti-roPL immunization were variable in ewes and that commercially available and widely acceptable adjuvant preparations were not effective to produce high anti-roPL titers in pre-pubertal ewes. In the non-prolific Rambouillet ewe in Texas and in the Awassi and the Assaf in Israel, anti-roPL immunization increased lamb birth weight; however, the magnitude of this effect and the inherent variability precluded our ability to determine the physiological mechanism of how the immunization increases fetal growth. Collectively, our findings suggest that anti-roPL immunization is not currently feasible as an easy and efficacious tool for the producer to increase flock reproductive and production efficiency. The variability in response of individual ewes to anti-roPL immunization likely includes modifying the recombinant hormone and the type of adjuvant used for the immunization. In particular, the oPL may need to be modified to ensure maximum antigenicity in a broad range of breed types. Nonetheless, the investigators continue to collaborate on identifying fundamental mechanisms that can be improved by genetics or management to enhance the efficiency of uteroplacental function and, in turn, fetal growth and development. High prolificacy is a desirable trait in intensive sheep production systems. One of the main limitations of using prolific breeds of sheep is that increased litter size is associated with low birth weights and increased mortality of lambs. Further, low birth weight is associated with an increased propensity for adult diseases and decreased production efficiency. Indeed, our recent studies find that the birth weights of lambs born in large litters can be improved by both genetics and management. Future cooperative research will continue to focus on reproductive efficiency of sheep that have broader implications for improving production efficiency in all types of ruminant livestock.
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Considine, Jennifer, Philip Galkin, and Abdullah Aldayel. Global Crude Oil Storage Index: A New Benchmark for Energy Policy. King Abdullah Petroleum Studies and Research Center, September 2022. http://dx.doi.org/10.30573/ks--2022-mp01.
Повний текст джерелаАнотація:
The global oil market dwarfs other commodity markets. Its size and role in the energy and industrial value chains underscore its significant economic and geopolitical impacts. Thus, the consequences of oil price fluctuations extend far beyond the oil industry and can be viewed as a barometer of trends in the global economy. Several oil price benchmarks currently compete in the global market. The most popular ones, such as Brent or West Texas Intermediate (WTI), are backed by a sufficient supply of the underlying crude. They also meet the criteria for efficient trading, hedging and speculating — including having sufficient liquidity, developed futures markets, low transaction costs and strong institutional support.
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Alviarez, Vanessa, Keith Head, and Thierry Mayer. Global Giants and Local Stars: How Changes in Brand Ownership Affect Competition. Inter-American Development Bank, June 2021. http://dx.doi.org/10.18235/0003333.
Повний текст джерелаАнотація:
We assess the consequences for consumers in 76 countries of multinational acquisitions in beer and spirits. Outcomes depend on how changes in ownership affect markups versus efficiency. We find that owner fixed effects contribute very little to the performance of brands. On average, foreign ownership tends to raise costs and lower appeal. Using the estimated model, we simulate the consequences of counter-factual national merger regulation. The US beer price index would have been 4-7% higher without divestitures. Up to 30% savings could have been obtained in Latin America by emulating the pro-competition policies of the US and EU.
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Paterson, Andrew H., Yehoshua Saranga, and Dan Yakir. Improving Productivity of Cotton (Gossypsum spp.) in Arid Region Agriculture: An Integrated Physiological/Genetic Approach. United States Department of Agriculture, December 1999. http://dx.doi.org/10.32747/1999.7573066.bard.
Повний текст джерелаАнотація:
Objectives: We seek to establish the basis for improving cotton productivity under arid conditions, by studying the water use efficiency - evaporative cooling interrelationship. Specifically, we will test the hypothesis that cotton productivity under arid conditions can be improved by combining high seasonal WUE with efficient evaporative cooling, evaluate whether high WUE and/or evaporative cooling are based on specific physiological factors such as diurnal flexibility in stomatal conductance, stomatal density, photosynthetic capacity, chlorophyll fluorescence, and plant water status. Genes influencing both WUE and evaporative cooling, as well as other parameters such as economic products (lint yield, quality, harvest index) of cotton will also be mapped, in order to evaluate influences of water relations on these parameters. Approach: Carbon isotope ratio will be used to evaluate WUE, accompanied by additional parameters to elucidate the relationship between WUE, evaporative cooling, and cotton productivity. A detailed RFLP map will be used to determine the number, location, and phenotypic effects of genes underlying genetic variation in WUE between cultivated cottons, as well as test associations of these genes with traits of economic importance such as harvest index, lint yield, and lint quality. Major Conclusions: Productivity and quality of cotton grown under well-watered versus water-limited conditions was shown to be partly accounted for by different quantitative trait loci (QTLs). Among a suite of physiological traits often found to differ between genotypes adapted to arid versus well-watered conditions, genetic mapping implicated only reduced plant osmotic potential in improved cotton productivity under arid conditions. Our findings clearly implicate OP as a major component of cotton adaptation to arid conditions. However, testing of further physiological hypotheses is clearly needed to account for additional QTL alleles conferring higher seed-cotton yield under arid conditions, such as three of the five we found. Near-isogenic lines being made for QTLs discovered herein will offer a powerful new tool useful toward identification of the underlying gene(s) by using fine-scale mapping approaches (Paterson et al 1990). Implications: Adaptation to both arid and favorable conditions can be combined into the same genotype. We have identified diagnostic DNA markers that are being applied to creation of such desirable genotypes. Simultaneous improvement of productivity (and/or quality) for both arid and irrigated conditions will require more extensive field testing and the manipulation of larger numbers of genes, reducing the expected rate of genetic gain These difficulties may be at least partly ameliorated by efficiencies gained through identification and use of diagnostic DNA markers. Genomic tools and approaches may expedite adaptation of crops to arid cultivation, help to test roles of additional physiological factors, and guide the isolation of the underlying genes that protect crop performance under arid conditions.
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Slater, Rachel, Daniel Longhurst, and Paul Harvey. Financing Social Assistance in Crisis Situations. Institute of Development Studies (IDS), February 2022. http://dx.doi.org/10.19088/basic.2022.021.
Повний текст джерелаАнотація:
Protracted crises are increasing and becoming compounded, but financing solutions for humanitarian and social assistance in fragile and conflict-affected settings (FCAS) are not keeping up. UN consolidated (humanitarian/emergency) appeals have, over the past decade, been around 60 per cent-funded, despite growing exponentially in size. Social protection coverage globally remains limited, with only an estimated 45 per cent of the world’s population having access to any form of social protection. This figure dips below 10 per cent in many low-income countries (Development Initiatives 2020; ILO 2017). The lack of coverage comes at a time when global extreme poverty increased in 2020 for the first time in decades (World Bank 2020). Indeed, by 2030, 85 per cent of the extreme poor – some 342 million people – will live in FCAS (Samman et al. 2018). Financing assistance in these contexts is complex, often arriving late, and/or is earmarked for certain actors and activities, when what is required is flexible, multipartner programming. This is despite commitments made by the signatories to the Grand Bargain and at the World Humanitarian Summit to improve the timeliness, flexibility, transparency, and efficiency of aid. Solutions to these challenges remain poorly understood or caught in humanitarian or social protection silos.