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Research status and hotspots of economic evaluation in nursing by co-word clustering analysis
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作者 Yao-Ji Liao Guo-Zhen Gao 《Frontiers of Nursing》 CAS 2019年第3期233-239,共7页
Objective:The aim of this study is to discover research status and hotspots of economic evaluation(EE)in nursing area using co-word cluster analysis.Methods:Medical Subject Heading(MeSH)term“cost–benefit analysis”w... Objective:The aim of this study is to discover research status and hotspots of economic evaluation(EE)in nursing area using co-word cluster analysis.Methods:Medical Subject Heading(MeSH)term“cost–benefit analysis”was searched in PubMed and nursing journals were limited by the function of filter.The information of author,country,year,journal,and keywords of collected paper was extracted and exported to Bicomb 2.0 system,where high-frequency terms and other data could be further mined.SPSS 19.0 was used for cluster analysis to generate dendrogram.Results:In all,3,020 articles were found and 10,573 MeSH terms were detected;among them,1,909 were MeSH major topics and generated 42 high-frequency terms.The consequence of dendrogram showed seven clusters,representing seven research hotspots:skin administration,infection prevention,education program,nurse education and management,EE research,neoplasm patient,and extension of nurse function.Conclusions:Nursing EE research involved multiple aspects in nursing area,which is an important indicator for decision-making.Although the number of papers is increasing,the quality of study is not promising.Therefore,further study may be required to detect nurses’knowledge of economic analysis method and their attitude to apply it into nursing research.More nursing economics course could carry out in nursing school or hospitals. 展开更多
关键词 cost–benefit analysis co-word clustering analysis economic evaluation NURSING NURSING education
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The Environmental Impacts and Economic Benefits on Comprehensively Promoting Alternative Fuel Buses in China: Life-Cycle and Scenario Analysis Based on LEAP Model
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作者 Siting Xie 《Journal of Geoscience and Environment Protection》 2019年第4期99-121,共23页
With the continuous development of urban public transportation, the harmful GHG emissions and pollutants generated by itself and the consequent issues such as the losses of residents’ health, economic value and resid... With the continuous development of urban public transportation, the harmful GHG emissions and pollutants generated by itself and the consequent issues such as the losses of residents’ health, economic value and residents’ welfare have become the focus of social attention. In order to study the impacts of promoting new energy vehicles on public transportation pollution mitigation and residents’ health benefits, this paper adopts the LEAP model to build some scenarios that fulfill different development needs to quantitatively analyze the ownership of new energy buses, the reduction of pollutants and the losses of residents’ health welfare. It is concluded that promoting new energy buses comprehensively can significantly reduce the emissions of atmospheric pollutants and the economic losses of residents’ health, but cannot fully realize the targets of greenhouse gas reduction under Life Cycle Analysis. 展开更多
关键词 New Energy Buses Emission MITIGATION economic benefits LIFE-CYCLE analysis SCENARIO analysis
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Allocation of Inter-Industry Environmental Responsibilities Based on Economic Benefits: Principles and Indicators
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作者 张友国 《China Economist》 2012年第6期56-67,共12页
Rational inter-industry allocation of environmental responsibilities has great significance to instituting effective policies on industrial environment and transforming the pattern of economic development. From the pe... Rational inter-industry allocation of environmental responsibilities has great significance to instituting effective policies on industrial environment and transforming the pattern of economic development. From the perspective of economic benefit and industrial linkage, this paper discusses the issue of inter-industry allocation of environmental responsibilities. Based on input-output model and three responsibility principles (producer responsibility, consumer responsibility and shared responsibility), this paper develops seven industrial environmental responsibility indicators and conducts an empirical analysis on the S02 emission responsibilities at China's industry level. Results indicate that all these indicators can avoid the double calculation of environmental responsibilities and results using different indicators have significant differences. Some industries such as power, heat production and supply may have little difference of the relative ranking of environmental responsibility under different indicators, but the magnitude of specific assumed responsibilities may have significant changes. Environmental responsibilities of some other industries (such as construction) may seem not important under certain indicators but can be among the most significant under some other indicators. More importantly, despite close connections between these indicators, they reflect different mechanisms of environmental responsibility allocation and have totally different policy significance. 展开更多
关键词 allocation of inter-industry environmental responsibilities economic benefits input/output analysis
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Economic Benefits and Environmental Costs of China's Exports: A Comparison with the USA Based on Network Analysis 被引量:5
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作者 Ya Liu Yuhuan Zhao +3 位作者 Hao Li Song Wang Yongfeng Zhang Ye Cao 《China & World Economy》 SCIE 2018年第4期106-132,共27页
This' paper decomposes economic benefits (value-added) and environmental costs (CO2) of exports according to their sources, and maps the global value network (GVN) and the global emissions network (GEN) for C... This' paper decomposes economic benefits (value-added) and environmental costs (CO2) of exports according to their sources, and maps the global value network (GVN) and the global emissions network (GEN) for China's exports during 1995-2009 from national, sectoral and national sectoral perspectives. A comparison is conducted between China and the USA. National GVN and GEN show that shares of value-added and CO2 emissions from China in its GVN and GEN both decreased first then increased after 2006, while shares from the USA in its GVN and GEN generally decreased. Seetoral GVN and GEN show that among China's exports, "electrical and optical equipment" and "electricity, gas and water supply" were, respectively, the sectors that obtained the most value-added and emitted the most CO2. National-sectoral G VN and GEN for China exhibited reciprocal and disassortative patterns, and in-strengths and out-strengths of GVN and GEN for China 's exports were mainly captured by several domestic country-sector pairs. 展开更多
关键词 economic benefits environmental costs EXPORTS global emissions network global value network network analysis
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A STUDY ON STRUCTURAL ANALYSIS OF SUBURBAN ECOLOGICAL AND ECONOMIC SYSTEM ─Taking Tianjin Suburbs and Counties for Example 被引量:1
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作者 张宝光 《Chinese Geographical Science》 SCIE CSCD 1995年第2期125-136,共12页
Along with the development of urban economy. the growth of urban population and the increase of needs of urban society, the suburban ecological and economic system changes constantly and profoundly in its structure an... Along with the development of urban economy. the growth of urban population and the increase of needs of urban society, the suburban ecological and economic system changes constantly and profoundly in its structure and function.Intensifying the research on structural analysis of suburban ecological and economic system is of great significance for grasping light the laws governing the development and evolution of the suburban ecological and economic system and leading this system onto a path of sound circle. By making comprehensive use of the cluster analysis and latent structural analysis the author attempts to explore a new avenue of revealing the structure of suburban ecological and economic system, taking Tianjin suburbs and counties as an example. The results obtained from the above-stated analyses show that it is entirely possible and extremely effective to study the structure and function of suburban ecological and economic system and provide scientific evidence for control of this system by using mathematical methods and statistical analyses. 展开更多
关键词 SUBURBAN ECOLOGICAL and economic SYSTEM cluster analysis latent STRUCTURAL analysis
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A Research on Competitiveness of Guangxi City——Based on System Clustering Method and Principal Component Analysis Method
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作者 FAN Chang-ke WU Yu 《Asian Agricultural Research》 2010年第2期13-16,共4页
A total of 10 indices of regional economic development in Guangxi are selected.According to the relevant economic data,regional economic development in Guangxi is analyzed by using System Clustering Method and Princip... A total of 10 indices of regional economic development in Guangxi are selected.According to the relevant economic data,regional economic development in Guangxi is analyzed by using System Clustering Method and Principal Component Analysis Method.Result shows that System Clustering Method and Principal Component Analysis Method have revealed similar results analysis of economic development level.Overall economic strength of Guangxi is weak and Nanning has relatively high scores of factors due to its advantage of the political,economic and cultural center.Comprehensive scores of other regions are all lower than 1,which has big gap with the development of Nanning.Overall development strategy points out that Guangxi should accelerate the construction of the Ring Northern Bay Economic Zone,create a strong logistics system having strategic significance to national development,use the unique location advantage and rely on the modern transportation system to establish a logistics center and business center connecting the hinterland and the Asean Market.Based on the problems of unbalanced regional economic development in Guangxi,we should speed up the development of service industry in Nanning,construct the circular economy system of industrial city,and accelerate the industrialization process of tourism city in order to realize balanced development of regional economy in Guangxi,China. 展开更多
关键词 clustering analysis Method Factor analysis Method economic development level economic strength China
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Urban Forest and Tree Valuation Using Discounted Cash Flow Analysis: Impact of Economic Components
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作者 Kristin S. Peterson Thomas J. Straka 《Open Journal of Forestry》 2012年第3期174-181,共8页
Discounted cash flow analysis is one of the standard methods used to value urban forests and trees. It involves calculating today’s value for all benefits and costs attributed to an investment;that is discounting all... Discounted cash flow analysis is one of the standard methods used to value urban forests and trees. It involves calculating today’s value for all benefits and costs attributed to an investment;that is discounting all cash flows to today’s value using an appropriate interest rate. This requires each benefit and cost be stated in terms of its cash flow. Urban tree benefits are complex. Little notice is given to the components of these benefits. Total urban tree benefits are a summation of partial benefits, including property value increase, storm water reduction, air quality improvement, carbon sequestration, natural gas savings, and electricity savings. We discuss the nature of these partial benefits, especially the geographical, temporal, diameter size, and rate of growth differences. These differences are even reflected in nursery stock valuation. Net present value analysis is used to illustrate the impact of these differences on financial return. An understanding of these components will prove valuable to those attempting to estimate urban forest and tree benefits. 展开更多
关键词 Urban Forest benefits Costs economic COMPONENTS Discounted CASH Flow analysis ARBORICULTURE
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Spatial Heterogeneity Analysis of PM2.5 Concentration in Central Plains Economic Region
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作者 Kaiguang Zhang Hongling Meng +1 位作者 Mingting Ba Yanmin Sun 《Journal of Geoscience and Environment Protection》 2020年第12期244-254,共11页
The research of the spatial heterogeneity of PM2.5 concentration in an area, is of great significance for understanding its regional spatial distribution structure, exploring the transmission relationship between regi... The research of the spatial heterogeneity of PM2.5 concentration in an area, is of great significance for understanding its regional spatial distribution structure, exploring the transmission relationship between regions, in order to formulate joint prevention and control measures within the entire area. Based on the daily monitoring data of PM2.5 concentration in the Central Plains Economic Region in 2019, this paper utilizes cluster analysis to divide the regional PM2.5 concentration into 5 classes, builds their spatial semi-variogram model, and then utilizes interpolation analysis method to study the regional overall distribution characteristics and transmission law. The results show that the PM2.5 concentration in the Central Plains Economic Region has a medium or higher spatial autocorrelation. The critical value of the overall PM2.5 concentration in the area is 150 μg/m3, as the overall PM2.5 concentration less than the value, the PM2.5 in a region mainly comes from local emissions, as the overall PM2.5 concentration higher than the value, the influence of spatial structure on the distribution of PM2.5 concentration is gradually obvious. PM2.5 has a certain degree of spatial transmission, which mainly includes two routes as Puyang-Xingtai and Puyang-Zhengzhou, and the transmission intensity of the former is greater than the latter. 展开更多
关键词 Cluster analysis Semi-Variogram Spatial Heterogeneity Spatial Structure Central Plains economic Region
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Ranking and Clustering of the Economic Status of Rural Residents in 31 Provinces and Regions in China
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作者 TANG Jun Science and Education Quality Department, Hubei Province Agricultural Mechanization Management Office, Wuhan 430017, China 《Asian Agricultural Research》 2010年第12期34-36,共3页
In order to rank and cluster the economic status of rural residents in 31 provinces, cities and autonomous regions, the MATLAB software is used and the component analysis and the cluster analysis are conducted on the ... In order to rank and cluster the economic status of rural residents in 31 provinces, cities and autonomous regions, the MATLAB software is used and the component analysis and the cluster analysis are conducted on the data reflecting the economic status of each area. The results show that the provinces or cities with high comprehensive , scores are Shanghai Municipality, Beijing Municipality, Zhejiang Province, Jiangsu Province, Tianjin Municipality, Guangdong Province, Fujian Province, Shandong Province and Liaoning Province according to priority; the provinces or autonomous regions with low comprehensive scores are Gansu Province, Guizhou Province , Tibet, Uygur autonomous region and Yunnan Province. The economic status of rural residents in the 31 provinces and autonomous regions are partly parallel with the comprehensive economic development. The improvement of the economic status of rural residents is helpful for the overall economic elevation. Therefore, the government should coordinate the economic development of urban and rural areas, industry and agricultural, developed region and undeveloped region, and coastal areas and central and western areas to maximize the social welfare of the whole nation. 展开更多
关键词 economic status of RURAL RESIDENTS Principal compo
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Urban Economic Cluster Template and Its Dynamics of Beijing,China 被引量:3
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作者 YANG Zhenshan LIANG Jinshe CAI Jianming 《Chinese Geographical Science》 SCIE CSCD 2014年第6期740-750,共11页
Economic clusters have been a central focus of current urban and regional research, policies and practices. However, a methodology to identify and analyze policy-relevant economic cluster dynamics is still not well de... Economic clusters have been a central focus of current urban and regional research, policies and practices. However, a methodology to identify and analyze policy-relevant economic cluster dynamics is still not well developed. Based on input-output(I-O) data of 1987, 1992, 1997, 2002 and 2007 of Beijing, this article presents an adapted principle component analysis for identifying the evolution of local economic cluster patterns. This research addresses the changes of economic interaction of industries with complementary and common activities over time. The identified clusters provide an insight into the reality of economic development in a diversifying urban economy: the increasing importance of services and the growing interaction between service and manufacturing industries. Our method therefore provides the analysts with a better understanding of the emergence, disappearance and development of economic clusters citywide. The results could be used to assist monitoring urban economic development and designing more practical urban economic strategies. 展开更多
关键词 economic clusters industrial linkages urban economic dynamics functional analysis INPUT-OUTPUT BEIJING China
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The need for a new framework for the economic evaluation of health services in a national health scheme 被引量:1
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作者 Jeff R. Richardson John McKie Kompal Sinha 《Health》 2010年第9期1120-1133,共14页
The normative theory of economic evaluation and its welfare theoretic basis are deeply problematical and result in recommendations which are potentially unfair. The root cause of the problem is the set of assumptions ... The normative theory of economic evaluation and its welfare theoretic basis are deeply problematical and result in recommendations which are potentially unfair. The root cause of the problem is the set of assumptions behind the theory which posit behaviours and motivations that are not universal, and which exclude other behaviours and motivations that are potentially important. As falsification of assumptions may be evaded indefinitely this paper presents an alternative critique. We commence with six an- omalies with the theory which are attributable to the assumptions. The first three—the net present value criterion, the willingness to pay criterion and moral hazard—arise from welfare theory. The remaining three are associated with the present definition of cost, the concept of efficiency and the omission of sharing, which are common to most economic evaluation. We argue that these anomalies are indicative of a defective core theory and that they are equivalent to observations that conflict with a positive theory. In the final section we outline and illustrate a more general framework for decision making that is capable of overcoming the ano- malies we discuss. 展开更多
关键词 economic Evaluation economic COSTS WELFARE Theory Empirical ETHICS Cost BENEFIT analysis
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Practice and Exploration of Economic Benefit Evaluation of Medical Equipment in Our Hospital 被引量:1
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作者 Wei-wei Shi 《中国医疗设备》 2016年第12期1-3,16,共4页
Objective The evaluation index of medical equipment's economic benefit is based on the usage of medical equipment,the traditional data collection method is time-consuming,laborious and not entirely accurate.The us... Objective The evaluation index of medical equipment's economic benefit is based on the usage of medical equipment,the traditional data collection method is time-consuming,laborious and not entirely accurate.The usage of medical equipment is obtained by designing data query statements from the HIS system.Methods First the charging items are in correspondence with the device's name included,second fees and other relevant data are extracted from charging module in HIS.Through a rough estimate of the recovery period and an increase or decrease ratio,the economic benefit of the medical equipment can be analyzed.Results Through the method of the benefit analysis of the medical equipment,we can clearly find out the different economic benefit of the equipment,and finally analyze the reasons.Conclusion Practice has proved that,this methad,it can greatly reduce human,material resources required in data collection and improve the accuracy of the data.It can help hospital managers timely to grasp the operating costs of medical equipment and other information,and also provide scientific data for hospital managers when they purchase reasonable medical equipment. 展开更多
关键词 economic BENEFIT analysis of medical equipment HOSPITAL information system data QUERY CHARGING items program design
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An Integrated Approach to Evaluate Benefits and Costs of Wastewater and Solid Waste Management to Improve the Living Environment: The Citarum River in West Java, Indonesia 被引量:2
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作者 S. M. Kerstens G. Hutton +2 位作者 I. Firmansyah I. Leusbrock G. Zeeman 《Journal of Environmental Protection》 2016年第11期1439-1465,共27页
Absence of wastewater and solid waste facilities impacts the quality of life of many people in developing countries. Implementation of these facilities will benefit public health, water quality, livelihoods and proper... Absence of wastewater and solid waste facilities impacts the quality of life of many people in developing countries. Implementation of these facilities will benefit public health, water quality, livelihoods and property value. Additional benefits may result from the potential recovery of valuable resources from wastewater and solid waste, such as compost, energy, phosphorus, plastics and paper. Improving water quality through implementation of wastewater and solid waste interventions requires, among others, an analysis of i) sources of pollution, ii) mitigating measures and resource recovery potentials and their effect on water quality and health, and iii) benefits and costs of interventions. We present an integrated approach to evaluate costs and benefits of domestic and industrial wastewater and solid waste interventions. To support a policy maker in formulating a cost and environmentally effective approach, we quantified the impact of these interventions on 1) water quality improvement, 2) resource recovery potential, and 3) monetized benefits versus costs. The integration of technical, hydrological, agronomical and socio-economic elements to derive these three tangible outputs in a joint approach is a novelty. The approach is demonstrated using the heavily polluted Indonesian Upper Citarum River in the Bandung region. Domestic interventions, applying simple (anaerobic filter) technologies, were economically most attractive with a benefit cost ratio (BCR) of 3.2, but could not reach target water quality standards. To approach the target water quality, both advanced domestic (nutrient removal systems) and industrial wastewater treatment interventions were required, leading to a BCR of 2. We showed that benefits from selling recovered resources represent here an additional driver for improving water quality and outweigh the additional costs for resource recovery facilities. While included benefits captured some of the major items, these may have been undervalued. Based on these findings, water quality interventions justify their costs and are socially and economically beneficial. 展开更多
关键词 SANITATION Water Quality Modeling economic Cost Benefit analysis Resource Recovery ASIA Indonesia
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Economics of Different Genotypes of Cotton Planted under Various Planting Densities
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作者 Shakeel Ahmad Anjum Imran Khan +7 位作者   Ehsanullah Rashad Waseem Khan Qadri Muhammad Muzammil Jahangir Muqarrab Ali Mohsin Nawaz Mohsin Bashir Muhammad Zain 《American Journal of Plant Sciences》 2015年第9期1570-1574,共5页
A field experiment was conducted in order to evaluate the economics of different genotypes of cotton planted under various planting densities at Agronomic Research Area, University of Agriculture Faisalabad during the... A field experiment was conducted in order to evaluate the economics of different genotypes of cotton planted under various planting densities at Agronomic Research Area, University of Agriculture Faisalabad during the summer season in 2013. Sowing was done manually with the help of dibbling method on both sides of the bed in standing water, with bed distance of 75 cm. The crop was sown in May and the experiment comprised of following FH-142, FH-114 at various densities (S1 = 10 cm, S2 = 15 cm, S3 =20 cm, S4 = 25 cm, S5 = 30 cm). Data regarding net field benefit, benefit cost ratio, dominance analysis, and marginal rate of return were collected. The experimental results showed that maximum NFB of (Rs. 222,575), (Rs. 202,483) was achieved in FH-142 and FH-114 when planted at a plant spacing of 20 cm and 15 cm respectively. While the maximum benefit cost ratio (BCR) of 1.76 was found in genotype FH-142 at plant spacing of 20 and 25 cm and FH-114 depicted maximum BCR of 1.62 and 1.61 when planted at plant spacing of 15 and 20 cm, respectively. Dominance analysis of FH-142 planted at 10 and 15 cm while FH-114 at plant spacing of 10, 15 and 20 cm was dominated due to their lower net field benefits as compared to other treatments, while maximum marginal rate of return (1494%, 788%) by planting FH-142, FH-114 was obtained at 30 cm and 25 cm recorded respectively. 展开更多
关键词 Cotton GENOTYPES SPACINGS economic analysis BENEFIT Cost Ratio
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Agro-Economic Implications of Combined Application of Organic and Mineral Fertilizers on Maize
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作者 Ngoran Eveline Banye Tabi Oben Fritz Nguetsop Victor François 《Agricultural Sciences》 2020年第7期638-652,共15页
Continuous cultivation without adequate fertilizer application is responsible<span style="font-family:Verdana;"> for plant nutrient depletion and yield decline of major food crops in sub-Saharan Africa... Continuous cultivation without adequate fertilizer application is responsible<span style="font-family:Verdana;"> for plant nutrient depletion and yield decline of major food crops in sub-Saharan Africa. Field experiments were conducted on umbric Cambisol in Babungo and ustic Oxisol in Bansoa in the Western Highlands of Cameroon over two years to evaluate the effects of combined application of leaf biomass of agroforestry species and mineral fertilizers with their economic returns on maize yield performance. Ten treatments encompassing sole mineral fertilizer, sole leaf biomass of <i></i></span><i><i><span style="font-family:Verdana;">Calliandra</span></i><span style="font-family:Verdana;"></span></i>, <i><i><span style="font-family:Verdana;">Leucaena</span></i><span style="font-family:Verdana;"></span></i>, <i><i><span style="font-family:Verdana;">Acacia</span></i><span style="font-family:Verdana;"></span></i> and <i><i><span style="font-family:Verdana;">Cassia</span></i><span style="font-family:Verdana;"></span></i>, leaf biomasses combined with mineral fertilizer and absolute control were laid in a randomized complete block design and replicated three times. Data collected on maize grain yield was subjected to analysis of variance using XLSTAT version 2014 statistical software. In addition, an economic analysis was performed to evaluate the profitability of the different treatment combinations. The results showed significant differences (<i><i><span style="font-family:Verdana;">P</span></i><span style="font-family:Verdana;"></span></i> ≤ 0.05) amongst the different treatments on maize yield on both soil types. The highest maize yields which stood at 5.93 t/ha and 6.01 t/ha were recorded in plots treated with <i><span style="font-family:Verdana;">Acacia</span></i><span style="font-family:Verdana;"> and </span><i><span style="font-family:Verdana;">Cassia</span></i><span style="font-family:Verdana;"> plus half recommended mineral fertilizer on umbric Cambisol and ustic Oxisol respectively. Economic analyses showed that </span><i><span style="font-family:Verdana;">Acacia</span></i><span style="font-family:Verdana;"> and </span><i><span style="font-family:Verdana;">Cassia</span></i><span style="font-family:Verdana;"> plus half recommended mineral fertilizer gave the highest net benefit and return to labor of 286500 FCFA and 5.1 on umbric Cambisol and 296051 FCFA and 5.3 on ustic Oxisol respectively. </span><span style="font-family:Verdana;">O</span><span style="font-family:;" "=""><span style="font-family:Verdana;">n both soils, all the treatments except <i></i></span><i><i><span style="font-family:Verdana;">Calliandra </span></i><span style="font-family:Verdana;"></span></i>with half recommended mineral fertilizers were economically profitable with benefit to cost ratios that ranged from 2.02 to 2.92.</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">Combined application of agroforestry tree species leaf biomass and mineral fertilizers is an appropriate technology to enhance maize grain yield and is economically profitable except </span><i><span style="font-family:Verdana;"><i>Calliandra</i></span></i><span style="font-family:Verdana;"> with half recommended mineral fertilizers and is therefore recommended for degraded <i></i></span><i><i><span style="font-family:Verdana;">Calliandra</span></i><span style="font-family:Verdana;"></span></i> and Oxisols in the Western Highlands of Cameroon.</span> 展开更多
关键词 Benefit Cost Ratio economic analysis Maize Yield Net Benefit PROFITABILITY
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Typical Application Scenarios and Economic Benefit Evaluation Methods of Battery Energy Storage System
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作者 Ming Zeng Haibin Cao +4 位作者 Ting Pan Pinduan Hu Shi Tian Lijun Zhong Zhi Ling 《Energy Engineering》 EI 2022年第4期1569-1586,共18页
Energy storage system is an important means to improve the flexibility and safety of traditional power system,but it has the problem of high cost and unclear value recovery path.In this paper,the typical application s... Energy storage system is an important means to improve the flexibility and safety of traditional power system,but it has the problem of high cost and unclear value recovery path.In this paper,the typical application scenarios of energy storage system are summarized and analyzed from the perspectives of user side,power grid side and power generation side.Based on the typical application scenarios,the economic benefit assessment framework of energy storage system including value,time and efficiency indicators is proposed.Typical battery energy storage projects are selected for economic benefit calculation according to different scenarios,and key factors are selected for sensitivity analysis.Finally,the key factors affecting economic benefit of the energy storage system are analyzed. 展开更多
关键词 Battery energy storage system application scenarios economic benefit evaluation sensitivity analysis
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Advanced Methods of Evaluating Benefits from Improved Flood Immunity in Queensland
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作者 Wayne Davies 《Journal of Civil Engineering and Architecture》 2013年第8期973-991,共19页
The regular occurrence and the high costs of flooding to both road agencies and communities is a strong impetus to investigate the methodologies applied to evaluating flood immunity road projects. Very little literatu... The regular occurrence and the high costs of flooding to both road agencies and communities is a strong impetus to investigate the methodologies applied to evaluating flood immunity road projects. Very little literature exists on methods of evaluating the benefits of improving flood immunity through better road infrastructure. This paper attempts to address some of the numerous issues hindering the accurate evaluation of flood immunity road projects. The methodologies presented in this paper are designed to evaluate benefits that are not normally included or not fully considered in evaluations; such benefits include reduced flood related road accidents, costs of not travelling during the closure period and additional costs from unanticipated flood events. A key focus of the paper is the consideration of the evaluation of improved flood immunity from a network perspective rather than the typical approach of evaluating flood immunity projects in isolation to each other. The application of the proposed methodologies is demonstrated with a hypothetical example of a typical rural network subjected to regular flooding. The results of the analysis, conducted using the proposed methodologies, reveals that the currently applied methodologies account for less than half the likely value of benefits of a package of projects that will prevent the complete isolation of communities during serious flood events. 展开更多
关键词 Flood immunity economic evaluation cost benefit analysis road closures.
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Analyzing Differences between Online Learner Groups during the COVID-19 Pandemic through K-Prototype Clustering
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作者 Guanggong Ge Quanlong Guan +2 位作者 Lusheng Wu Weiqi Luo Xingyu Zhu 《Journal of Data Analysis and Information Processing》 2022年第1期22-42,共21页
Online learning is a very important means of study, and has been adopted in many countries worldwide. However, only recently are researchers able to collect and analyze massive online learning datasets due to the COVI... Online learning is a very important means of study, and has been adopted in many countries worldwide. However, only recently are researchers able to collect and analyze massive online learning datasets due to the COVID-19 epidemic. In this article, we analyze the difference between online learner groups by using an unsupervised machine learning technique, i.e., k-prototypes clustering. Specifically, we use questionnaires designed by domain experts to collect various online learning data, and investigate students’ online learning behavior and learning outcomes through analyzing the collected questionnaire data. Our analysis results suggest that students with better learning media generally have better online learning behavior and learning result than those with poor online learning media. In addition, both in economically developed or undeveloped regions, the number of students with better learning media is less than the number of students with poor learning media. Finally, the results presented here show that whether in an economically developed or an economically undeveloped region, the number of students who are enriched with learning media available is an important factor that affects online learning behavior and learning outcomes. 展开更多
关键词 Online Learning K-Prototypes clustering economically Developed Region Data analysis Different Groups Learning Behavior Learning Media
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19个油茶品种果实主要经济性状和油脂品质的差异分析 被引量:3
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作者 季琳琳 陈素传 +3 位作者 姚小华 张文胜 韩文妍 殷刘彪 《中国农学通报》 2024年第1期20-27,共8页
通过分析安徽省引种的19个油茶品种养分含量等指标,筛选适宜大别山南麓的油茶品种。对19个油茶品种果实的9个主要经济性状及单株产量、7个主要营养成分含量进行差异性及聚类分析。结果表明,19个油茶品种鲜果单果质量、单果鲜籽质量、单... 通过分析安徽省引种的19个油茶品种养分含量等指标,筛选适宜大别山南麓的油茶品种。对19个油茶品种果实的9个主要经济性状及单株产量、7个主要营养成分含量进行差异性及聚类分析。结果表明,19个油茶品种鲜果单果质量、单果鲜籽质量、单株产量、含油率、蛋白质、主要脂肪酸等指标差异极显著‘,湘林7号’鲜果单果质量最大‘,长林3号’鲜出籽率、干出仁率及单株产量均最高。含油率与硬脂酸、油酸含量指标呈极显著正相关,油酸与亚油酸呈极显著负相关。依据评价模型得出‘湘林7号’、‘湘林40号’、‘长林53号’品质最优。聚类分析将19个品种分为4组,‘长林53号’、‘湘林40号’、‘湘林97号’聚为一类,‘长林3号’和‘湘林7号’分别单独聚为一类,其余的油茶品种聚为一类。可依据油酸含量及含油率等指标筛选油茶品种;油茶果实的营养成分含量及主要经济性状差异达到显著水平;大别山南麓适宜栽培品种为‘湘林7号’‘、湘林40号’及‘长林53号’,较适宜品种为‘长林18号’‘、湘林1号’及‘湘林26号’。 展开更多
关键词 油茶 品种 经济性状 养分含量 聚类分析
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Human wetland dependency and socio-economic evaluation of wetland functions through participatory approach in rural India
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作者 Malabika BISWAS Nihar R.SAMAL +1 位作者 Pankaj K.ROY Asis MAZUMDAR 《Water Science and Engineering》 EI CAS 2010年第4期467-479,共13页
Wetlands are an important source of natural resources upon which rural economies depend. They have increasingly been valuable for their goods and services, and the intrinsic ecological value they provide to local popu... Wetlands are an important source of natural resources upon which rural economies depend. They have increasingly been valuable for their goods and services, and the intrinsic ecological value they provide to local populations, as well as people living outside the periphery of the wetlands. Stakeholders' participation is essential to the protection and preservation of wetlands because it plays a very important role economically as well as ecologically in the wetland system. The objective of this study was to determine whether gender, educational status, mouzas (which are constituents of a block according to the land reform of the West Bengal Government in India), and wetland functions have any influence on the annual income of the local community. Considering a floodplain wetland in rural India, the focus was extended to recognize the pattern of wetland functions according to the nature of people's involvement through cluster analysis of the male and female populations. Using the statistical software R-2.8.1, an ANOVA (analysis of variance) table was constructed. Since the p value (significance level) was lower than 0.05 for each case, it can be concluded that gender, educational status, mouzas, and wetland functions have a significant influence on annual income. However, S-PLUS-2000 was applied to obtain a complete scenario of the pattern of wetland functions, in terms of involvement of males and females, through cluster analysis. The main conclusion is that gender, educational status, mouzas, and wetland functions have significant impacts on annual income, while the pattern of occupation of the local community based on wetland functions is completely different for the male and female populations. 展开更多
关键词 wetland dependency socio-economic evaluation wetland functions rural India cluster analysis
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