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Economic Evaluation on "Planting Three to Produce Four" High-yielding Project of Super Hybrid-rice in Hunan
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作者 邓文 彭既明 +4 位作者 刘英 金龙新 刘晗 刘军 黄振国 《Agricultural Science & Technology》 CAS 2015年第9期2048-2054,2069,共8页
The research conducted investigation and survey on 186 farm households in 2014 and carried out economic evaluation on "planting three to produce four" highyielding project of super hybrid rice. The results showed th... The research conducted investigation and survey on 186 farm households in 2014 and carried out economic evaluation on "planting three to produce four" highyielding project of super hybrid rice. The results showed that the project of "planting three to produce four" performed significantly in terms of increasing yields and incomes. For example, per unit area yield of one-season late hybrid rice and middleseason hybrid rice proved the highest, and net income from middle-season rice in Longhui was the highest. It is obvious that to increase per unit yield is key for improving net incomes and to reduce machine fees and worker fees is crucial for decreasing fees. 展开更多
关键词 Super hybrid-rice "Planting three to produce four" economic evaluation HUNAN
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An economic evaluation method of coalbed methane resources during the target selection phase of exploration 被引量:5
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作者 Dong-Kun Luo Liang-Yu Xia 《Petroleum Science》 SCIE CAS CSCD 2015年第4期705-711,共7页
Because forecasting a development program during the target selection phase of exploration for coalbed methane (CBM) is impossible, the conventional method that relies on a conceptual (or detailed) development pro... Because forecasting a development program during the target selection phase of exploration for coalbed methane (CBM) is impossible, the conventional method that relies on a conceptual (or detailed) development pro- gram cannot be used during the economic evaluation of CBM resources. Hence, this study focuses on establishing an economic evaluation model based on the characteristics of the target selection phase. The discounted cashflow method is applied to the construction of the model with the assumption that there is a uniform distribution of produc- tion wells. The computational error generated by the assumption is corrected by introducing a correction factor based on the production profile of single CBM wells. The case study demonstrates that the blocks lacking economic value can be screened out, and the most advantageous targets can be found by computing the resource values in the best- and worst-case scenarios. This technique can help to reduce wasted investments and improve the quality of decision-making in selecting targets for exploration. 展开更多
关键词 Coalbed methane Exploration targetselection economic evaluation Scenario analysis
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Economic evaluation of cervical cancer screening strategies in urban China 被引量:4
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作者 Li Ma Yuying Wang +11 位作者 Xiaohong Gao Yi Dai Yu Zhang Zhaojing Wang Xiaoxia Wang Limin Wang Jing Jiang Xinhua Jing Chunxia Yang Fanghui Zhao Jinghe Lang Youlin Qiao 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 2019年第6期974-983,共10页
Objective:This study evaluated the feasibility of different cervical cancer screening strategies in urban China.Methods:A Markov model was constructed to simulate a hypothetical cohort of 100,000 females aged 30-59 ye... Objective:This study evaluated the feasibility of different cervical cancer screening strategies in urban China.Methods:A Markov model was constructed to simulate a hypothetical cohort of 100,000 females aged 30-59 years in a 20-year period.Screening strategies included liquid-based cytology(LBC)every three years,human papillomavirus(HPV)DNA testing every three and five years,respectively,and a combination of HPV DNA testing and LBC(HPV+LBC)every three and five years,respectively.Model outcomes included cumulative incidence over 20 years,cumulative risk of cervical cancer,costs,life year saved(LYS),quality-adjusted life years(QALYs)and benefits.The cost-effectiveness ratios(CERs),incremental cost-effectiveness ratios(ICERs),costutility ratios(CURs),and benefit-cost ratios(BCRs)were used as outcomes in the health economic evaluation analysis.Univariate sensitivity analyses were performed to examine the stability of the results.Results:The cumulative incidence of the five screening strategies ranged from 833.02 to 1,158.07 cases per100,000 females.HPV DNA testing was most effective in reducing the cumulative risk of cervical cancer,saving life years and QALYs and gaining benefits.The CERs of HPV DNA testing every three and five years,and LBC every three years were considered to be very cost-effective if they were below China's GDP per capita.The CERs of HPV+LBC were considered to be cost-effective if they were below three times GDP per capita.The incremental cost-effectiveness analysis showed that HPV DNA testing every three and five years,LBC every three years and HPV+LBC every five years were dominant strategies.Conclusions:The findings of this study indicated that HPV DNA testing every five years or LBC every three years should be recommended in urban China. 展开更多
关键词 Cervical cancer Markov model economic evaluation
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Health economic evaluation on population-based Helicobacter pylori eradication and endoscopic screening for gastric cancer prevention 被引量:2
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作者 Zhiqiang Hu Zongchao Liu +2 位作者 Wenqing Li Weicheng You Kaifeng Pan 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 2023年第6期595-605,共11页
Gastric cancer is a global public health burden, nearly one million new cases are diagnosed per year worldwide, of which 44% of cases occur in China. The prognosis of gastric cancer varies remarkably by the stage of c... Gastric cancer is a global public health burden, nearly one million new cases are diagnosed per year worldwide, of which 44% of cases occur in China. The prognosis of gastric cancer varies remarkably by the stage of cancer, and most of the patients in China are diagnosed at advanced stages, resulting in poor prognoses. Effective strategies to reduce the burden of gastric cancer include primary prevention through testing and treatment of Helicobacter pylori(H. pylori) and secondary prevention by screening and early detection. Although many countries have issued management guidelines and consensus reports concerning these strategies, the limited availability of healthcare resources often precludes their widespread implementation. Therefore, assessing the costs, benefits, and harms of population-based intervention measures through health economic evaluation is necessary for informed health policy decisions. Accordingly, we synthesize management approaches from different countries on H. pylori eradication and endoscopic screening, and also summarize recent advancements in health economic evaluations on population-based preventive strategies. The goal of the review is to provide empirical evidence supporting optimal resource allocation, maximizing benefits for the population, and ultimately reducing the burden of gastric cancer. 展开更多
关键词 Gastric cancer endoscopic screening Helicobacter pylori health economic evaluation
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The environment of coal mining areas and the economic evaluation of the land reclamation
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作者 王志宏 肖兴田 何志强 《Journal of Coal Science & Engineering(China)》 2001年第2期95-99,共5页
The environment impact of the coal resources mining was analyzed. The method of economic evaluation for the coal mining was established to analyze land destruction. The opportunity cost method was used to quantitative... The environment impact of the coal resources mining was analyzed. The method of economic evaluation for the coal mining was established to analyze land destruction. The opportunity cost method was used to quantitatively analyze and estimate the economic loss of the land destruction by coal mining. At the same time, the dump land reclamation of the Yuanbaoshan Open Pit was taken as an example to evaluate environmental and economical benefit with the method of economic evaluation for the coal mining areas land reclamation. 展开更多
关键词 coal resource environment impact land reclamation economic evaluation environment protect of mining area
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Net Present Value Method: A Method Recommended by ISO 15686-5 for Economic Evaluation of Building Life Cycle Costs
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作者 Hao Xie Qiao Cui Yang Li 《World Journal of Engineering and Technology》 2022年第2期224-229,共6页
The publication of ISO 15686-5 is significant for studies related to the life-cycle costs of buildings. Among the many economic evaluation methods, the NPV method is recommended for use by this standard. This stu... The publication of ISO 15686-5 is significant for studies related to the life-cycle costs of buildings. Among the many economic evaluation methods, the NPV method is recommended for use by this standard. This study explains the concept and method of PV, and then provides an explanation of the concept and method of NPV, and points out the limitations in the practical application of the method. 展开更多
关键词 NPV ISO 15686-5 BUILDING Life Cycle Cost economic evaluation
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Economic Evaluation of Hydraulic Fracturing in a Gas Condensate Reservoir Operating below Dewpoint
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作者 Anthony Kerunwa Princewill O. Ariche Nkemakolam Chinedu Izuwa 《Open Journal of Yangtze Oil and Gas》 2020年第3期73-86,共14页
Hydraulic fracturing is among the approaches used to optimize production from a gas condensate reservoir. A detailed economic analysis is required to evaluate the profitability and feasibility of hydraulic fracturing ... Hydraulic fracturing is among the approaches used to optimize production from a gas condensate reservoir. A detailed economic analysis is required to evaluate the profitability and feasibility of hydraulic fracturing as an optimization option in a gas condensate reservoir operating below dewpoint. The objective of this research is to evaluate the economic benefits derivable from the use of hydraulic fracturing to improve gas and liquid recovery from a gas condensate reservoir operating below dewpoint. This research considers the use of four profit indicators to ascertain the profitability of hydraulic fracturing in a gas condensate reservoir operating below dewpoint by increasing the fracture halflength, fracture width and fracture permeability. The production data of the reservoir was obtained and the economic calculations done on excel spreadsheet and plots generated. The four profit indicators considered in the research are Net Present Value, Payout, Discounted Cash Flow Rate of Return and Profit per Dollar Invested. The economic justification was done by carrying out a comparative economic analysis from the result obtained when the reservoir of study was unfractured with that obtained when the reservoir was fractured at various fracture parameters. The economic analysis was done considering a royalty and tax rate of 18.5% and 30% respectively and a gas price of $2/MSCF and condensate price of $30/bbl. This is done so as to find out if the additional cost of hydraulic fracturing can be offset by the recovery from the reservoir when its pressure declined below dewpoint. The result obtained showed that the additional recovery due to hydraulic fracturing by increasing the fracture halflength, fracture width and fracture permeability was not enough to justify the application of hydraulic fracturing when the reservoir pressure declined below dewpoint. 展开更多
关键词 economic evaluation Fracture Halflength Proppants Profit Indicators Hydraulic Fracturing Gas Condensate Reservoir Dewpoint
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Economic Evaluation of Gastroscopy for Detecting Gastric Cancer in Chinese Natural Population
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作者 Liu Yuhan Sun Lihua 《Asian Journal of Social Pharmacy》 2022年第4期343-350,共8页
Objective To evaluate the economy of detecting gastric cancer by electronic gastroscope in Chinese natural population of different ages and genders.Methods A Markov model was constructed for the population,including b... Objective To evaluate the economy of detecting gastric cancer by electronic gastroscope in Chinese natural population of different ages and genders.Methods A Markov model was constructed for the population,including both men and women of different ages.The model cycle was one year and the simulation time was 60 years.The cost-effectiveness of electronic gastroscopy in detecting gastric cancer of general population in China was analyzed from the perspective of the whole society,and the stability of the results was verified by sensitivity analysis.Results and Conclusion For the general population,the incremental cost-effectiveness ratio(ICER)of gastric cancer screening from the age of 50 is 50143 yuan/QALY(quality-adjusted life-year),which is less than two times of per capita gross domestic product(GDP)compared with the screening from the age of 55.For men who start gastric cancer screening at the age of 50,the ICER is 38525 yuan/QALY,which is less than two times of per capita GDP,and it is economical.For women who start the screening from the age of 55,the ICER is 47814 yuan/QALY,which is less than two times of per capita GDP,so it is economical.The results of sensitivity analysis are consistent with the conclusions of basic analysis,and the results of basic analysis are stable.For the general population,it is more economical to start gastric cancer screening from the age of 50,while for men and women,it is more economical to start gastric cancer screening from the age of 50 and 55,respectively. 展开更多
关键词 GASTROSCOPE gastric cancer SCREENING COST-UTILITY health economic evaluation
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Does health economics research align with the disease burden in the Middle East and North Africa region?A systematic review of economic evaluation studies on public health interventions
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作者 Mouaddh Abdulmalik Nagi Mustafa Ali Ali Rezq +2 位作者 Sermsiri Sangroongruangsri Montarat Thavorncharoensap Pramitha Esha Nirmala Dewi 《Global Health Research and Policy》 2022年第1期268-318,共51页
Introduction:Economic evaluation studies demonstrate the value of money in health interventions and enhance the efficiency of the healthcare system.Therefore,this study reviews published economic evaluation studies of... Introduction:Economic evaluation studies demonstrate the value of money in health interventions and enhance the efficiency of the healthcare system.Therefore,this study reviews published economic evaluation studies of public health interventions from 26 Middle East and North Africa(MENA)countries and examines whether they addressed the region’s major health problems.Methods:PubMed and Scopus were utilized to search for relevant articles published up to June 26,2021.The reviewers independently selected studies,extracted data,and assessed the quality of studies using the Consolidated Health Economic Evaluation Reporting Standards(CHEERS)checklist.Results:The search identified 61 studies.Approximately half(28 studies;46%)were conducted in Israel and Iran.The main areas of interest for economic evaluation studies were infectious diseases(21 studies;34%),cancers(13 studies;21%),and genetic disorders(nine studies;15%).Five(8%),39(64%),16(26%),and one(2%)studies were classified as excellent,high,average,and poor quality,respectively.The mean of CHEERS checklist items reported was 80.8%(SD 14%).Reporting the structure and justification of the selected model was missed in 21 studies(37%),while price and conversion rates and the analytical methods were missed in 21 studies(34%).Conclusions:The quantity of economic evaluation studies on public health interventions in the MENA region remains low;however,the overall quality is high to excellent.There were obvious geographic gaps across countries regarding the number and quality of studies and gaps within countries concerning disease prioritization.The observed research output,however,did not reflect current and upcoming disease burden and risk factors trends in the MENA region. 展开更多
关键词 Cost-effectiveness economic evaluation Middle East North Africa Public health
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Economic Evaluation for 5G Planning of a Distribution Network Considering Network Coupling and Important Node Identification
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作者 Xiaowei Wang Qiankun Kang +5 位作者 Liang Guo Fan Zhang Zhenfeng Liang Jie Gao Xue Wang Weibo Liu 《Protection and Control of Modern Power Systems》 SCIE EI 2024年第3期126-141,共16页
The rapid development of communication services in the power distribution network poses challenges for existing wireless communications,and the deployment of a fiber optic network is costly and difficult.The emerging ... The rapid development of communication services in the power distribution network poses challenges for existing wireless communications,and the deployment of a fiber optic network is costly and difficult.The emerging 5G technology has been piloted in power distribution networks,though the cost-effectiveness of its large-scale deployment remains unclear.This paper proposes an economic evaluation method for 5G planning in power distribution networks,considering the coupling relationship between power distribution and communication networks and the identification of important network nodes.First,the objective function to solve the planned number of 5G base stations is established.This is solved using the adaptive particle swarm algorithm and K-means algorithm.Second,the coupling relationship between the distribution and communication networks is discussed and quantified.The node importance of the coupling network is analyzed to identify the important nodes,and micro base stations or optical fibers are added to improve the reliability of the distribution network at the communication level.Finally,an economic evaluation index of 5G planning of the distribution network is established.The paper compares the economic solutions of 5G and 4G communications in city and town scenarios using the IEEE 123-node network as an example,and concludes that the economics of 5G are better than those of 4G. 展开更多
关键词 5G coupling relationship node im-portance economic evaluation adaptive particle swarm K-MEANS
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Studies on Technique of Reducing Methane Emission in a Rice-Duck Ecological System and the Evaluation of Its Economic Significance 被引量:5
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作者 XIANG Ping-an HUANG Huang +3 位作者 HUANG Mei GAN De-xin ZHOU Yan FU Zhi-qiang 《Agricultural Sciences in China》 CAS CSCD 2006年第10期758-766,共9页
The rice-duck ecological system is one of the major practices of the traditional Chinese agriculture. A study on the effect of reducing methane emission using this practice provided theoretical and practical basis for... The rice-duck ecological system is one of the major practices of the traditional Chinese agriculture. A study on the effect of reducing methane emission using this practice provided theoretical and practical basis for further development and utilization of this classical agricultural technique. The effect of reducing methane emission and the economic benefits of rice-duck ecological system were studied by carrying out a field experiment and by using economic methodology. The daily variation of CH4 emission in late rice paddy field was basically consistent with the daily variation of atmospheric temperature. The highest emission occurred at the full tillering stage of late rice with a rate of 24.1 or 32.2 or 40.5 mg m^-2 h^-1 in no-tillage area with duck and no-tillage area without duck and conventional-tillage area without duck, respectively. The inhibition of methane emission was apparently effective in the rice-duck ecological system during the initial tillering stage and the full tillering stage. Compared to the no-tillage area without duck, methane emission decreased by 2.333 g m^-2. Compared to the conventional-tillage area without duck, methane emission decreased by 4.723 g m^-2. During the production period of late rice, the amount of methane emission in no-tillage area with duck was 3.373 g m^-2 lesser than that of no-tillage area without duck, and 5.59 g m^-2 less than that of conventional-tillage without duck area. The economic significance was analyzed. Farmers adopting the rice-duck ecological system obtained 2 166 and 4 207 RMB yuan ha^-1 more income than those who adopted a no-tillage without duck technique or conventional-tillage without duck technique, respectively. In addition to the reduction of the environmental pollution by methane emission, the farmers who adopted the rice-duck ecological system achieved economic benefits of 5 000 RMB yuan ha^-1, which was 2 206 and 4 274 RMB yuan ha^-1 more than those who adopted a no-tillage without duck technique and a conventional-tillage without duck technique, respectively. The rice-duck ecological system not only increased the economic benefits for farmers, but also reduced methane emission in rice paddy field. A sustainable agricultural production mode was formed. 展开更多
关键词 NO-TILLAGE late rice rice-duck system methane emission mitigation options economic evaluation
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Tribological and economic evaluation of recycled mineral lubricating oils 被引量:4
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作者 LIU JianFang GU KaLi +2 位作者 DUAN HaiTao ZHAO Yuan LI Jian 《Science China(Technological Sciences)》 SCIE EI CAS 2013年第12期2964-2972,共9页
Seven kinds of used mineral lubricating oils,including hydraulic oils,film bearing oils,steam turbine oil and gear oils,were recycled by reclamation and adding additives.Physical and chemical properties of the recycle... Seven kinds of used mineral lubricating oils,including hydraulic oils,film bearing oils,steam turbine oil and gear oils,were recycled by reclamation and adding additives.Physical and chemical properties of the recycled oils were measured and their lubrication performances were evaluated by the original and modified four-ball testers.Worn surfaces were analyzed by energy dispersive X-ray spectroscopy and Raman microscope.The recycling costs of burning,re-refined and refortified were estimated.Results showed that physical and chemical properties of the refortified oils were improved effectively and became in the industrial access standard.With the different friction materials under different loads,refortified oils provided excellent lubrication performances,much better than those of fresh oils.Because of additives replenished,the different lubrication films could form on the worn surfaces.A rough financial calculation revealed that the refortification process could produce the most economic value among the three methods. 展开更多
关键词 lubricating oil refortification process lubrication performance economic evaluation physical and chemical property
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Economic Evaluation of Treating Herpes Zoster with Various Methods of Acupuncture and Moxibustion 被引量:4
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作者 李雪薇 杨运宽 +2 位作者 谢西梅 柏琳娜 张晓抒 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2012年第1期125-128,共4页
OBJECTIVE:To analyze the cost effect of surrounding acupuncture plus electric acupuncture,cotton-sheet moxibustion,puncturing with red-hot needles,tapping plus cupping on herpes zoster.METHODS:Five hundred patients wi... OBJECTIVE:To analyze the cost effect of surrounding acupuncture plus electric acupuncture,cotton-sheet moxibustion,puncturing with red-hot needles,tapping plus cupping on herpes zoster.METHODS:Five hundred patients with herpes zoster were randomly divided into group A(surrounding acupuncture plus electric acupuncture),group B(cotton-sheet moxibustion),group C(puncturing with red-hot needles),group D(tapping plus cupping),and group E(Western medicine).The treatment was carried out twice a day in group E and once a day in the other four groups.The curative effect was observed on the 10th day of treatment;the cost was calculated for the five therapies,and the cost-effect ratio(C/E) and increment ratio(△ C/△ E) were analyzed.RESULTS:After the 10-day treatment,there was no statistical difference(P>0.05) in the curative effect among the five groups.Pain being alleviated one day faster than in group E amounted to a saving of RMB 21.90 yuan in group A,a saving of RMB 21.87 yuan in group B,a saving of RMB 26.00 yuan in group C,and a saving of RMB 20.23 yuan in group D.Compared with group C,the values of △ C/△ E were RMB 1.55,2.81,and 0.21 yuan in groups A,B,and D,respectively.CONCLUSIONS:The curative effect in groups A,B,C,and D was similar to that in group E,but the C/E was better than in group E. 展开更多
关键词 ACUPUNCTURE Herpes zoster economic evaluation
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Models for economic evaluation of multi-purpose apple harvest platform and software development 被引量:1
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作者 Zhao Zhang Zhaohua Zhang +3 位作者 Xinmiao Wang Hu Liu Yuanjie Wang Weijie Wang 《International Journal of Agricultural and Biological Engineering》 SCIE EI CAS 2019年第1期74-83,共10页
An increasing number of U.S.apple growers are now interested in using harvest platforms to increase harvest productivity,expand labor pool,and alleviate tough working conditions.To maximize benefits,functions of thinn... An increasing number of U.S.apple growers are now interested in using harvest platforms to increase harvest productivity,expand labor pool,and alleviate tough working conditions.To maximize benefits,functions of thinning,pruning&training,and infield sorting have been or are to be incorporated into harvest platforms.Though growers are most concerned with economic benefits,few cost-benefit studies had been conducted on different platforms.In the meantime,economic analysis procedure is complex and each analysis is for one specific machine(not for general purposes).No software has been developed as a general and ready-to-use tool for growers and researchers for the platform economic analysis.In this study,platforms,both available on the marketplace and developed in lab as pilot trials,were reviewed.Costs and benefits models were then established,based on which multi-purpose apple harvest platform economic evaluation software(iMPAHP)was developed(capable of evaluating a wide variety of apple harvest platforms).A case study(machine cost of$100000,accommodating 6 workers,processing apple incidence of 10%with 90%sort-out rate,and harvest,thinning,and pruning&training productivity increase by 40%,50%,and 60%,respectively)based on iMPAHP demonstrated that infield sorting,harvest,thinning,and pruning and training accounted for 48.4%,23.9%,14.3%,and 13.4%of the total benefits,respectively.In the case that the platform was in all-four-purpose-application,the net present value(NPV)analysis of a 10-year investment showed a positive return of$60547.However,without infield sorting function,the NPV resulted in a negative value,indicating a loss for the machine investment.Though incorporating the modular infield sorting system certainly increased the overall machine investment by$30000,the benefits outweighed the costs. 展开更多
关键词 multi-purpose apple harvest platform economic evaluation infield sorting PRUNING THINNING training
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Economic evaluation of reverse osmosis desalination system coupled with tidal energy 被引量:1
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作者 Changming LING Yifei WANG +1 位作者 Chunhua MIN Yuwen ZHANG 《Frontiers in Energy》 SCIE CSCD 2018年第2期297-304,共8页
A reverse osmosis (RO) desalination system coupled with tidal energy is proposed. The mechanical energy produced by the tidal energy through hydraulic turbine is directly used to drive the RO unit. The system perfor... A reverse osmosis (RO) desalination system coupled with tidal energy is proposed. The mechanical energy produced by the tidal energy through hydraulic turbine is directly used to drive the RO unit. The system performances and the water cost of the conventional and tidal energy RO systems are compared. It is found that the proposed tidal energy RO system can save water cost in the range of 31.0%-41.7% in comparison with the conventional RO system. There is an optimum feed pressure that leads to the lowest water cost. The tidal RO system can save more costs at a high feed pressure or a high water recovery rate. The optimum feed pressure of the tidal energy RO system is higher than that of the conventional RO system. The longer lifetime of the tidal energy RO system can save even more water cost. When the site development cost rate is lower than 40%, the water cost of the tidal energy RO system will be lower than that of the conventional RO system. The proposed technology will be an effective alternative desalination method in the future. 展开更多
关键词 reverse osmosis (RO) desalination tidal energy MODEL economic evaluation
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Methodology for the economic evaluation of CO_(2) derived materials
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作者 Tiffany Wong Dan Zilnik +1 位作者 Marcius Extavour Michael Leitch 《Clean Energy》 EI 2021年第4期575-586,共12页
Scoring the technologies in competition for the NRG Canada’s Oil Sands Innovation Alliance Carbon XPRIZE required an economic evaluation to estimate the value created through the conversion of CO_(2) emissions into p... Scoring the technologies in competition for the NRG Canada’s Oil Sands Innovation Alliance Carbon XPRIZE required an economic evaluation to estimate the value created through the conversion of CO_(2) emissions into products.Across all of the Teams participating in the competition,58 different materials were consumed and produced.Standardized prices and market sizes needed to be established for each of these materials to ensure a consistent evaluation across all Teams.The Standards Data Set(SDS)was created as a standardized database of economic data used in the competition.The rationale for the SDS project and the methodology for researching each material is described.Ultimately,credible material definitions using the SDS methodology were created for all materials,and some research and methodological customization were required for materials that did not have credible,publicly available market data.The methodologies for establishing credible values and market sizes for concrete,concrete admixtures and syngas are highlighted as examples of materials whose value and markets are not easily defined. 展开更多
关键词 carbon capture CCUS economic evaluation market analysis commercial viability
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Technical, Economic and Environmental Evaluation on Mechanical Rice Straw Gathering Method
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作者 Nguyen Thanh Nghi Nguyen Duc Canh +2 位作者 Hau Duc Hoa Nguyen Van Hung Martin Gummert 《Journal of Environmental Science and Engineering(B)》 2015年第11期614-619,共6页
Rice straw is a rice by-product, which is currently mostly wasted in Vietnam, in particular in the Mekong delta. At present, the cost of straw gathering is increasing because of the increased use of combine harvesters... Rice straw is a rice by-product, which is currently mostly wasted in Vietnam, in particular in the Mekong delta. At present, the cost of straw gathering is increasing because of the increased use of combine harvesters. High labor cost and lack of labor makes manual collection unfeasible. Farmers therefore often just burn it, which causes pollution, increased greenhouse gas emissions and loss of opportunities to value add. An economic and environmental evaluation and technical field testing of a straw baler with 4 ha/day capacity was therefore conducted in Long An province. During the field testing data on the gathering capacity, fuel consumption, labor requirement and other cost items were collected. The test results showed that the baling cost is US$19.0 per ton of rice straw, the pay-back period of 2. 1 years and the internal rate of return of 38%. In addition to the baling cost, the transportation cost varies from US$24 for a distance of 100 km to US$32 for 150 km. The benefits of the machine are not only economical but also include the reduction of field burning. 展开更多
关键词 Rice straw gathering technical and economic evaluation environmental benefits.
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Economic Evaluation of a Water Source Project
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作者 WANG Shilin(Institute of Systems Science, Academia Sinica, Beijing, 100080)XUE Yiming(Beijing Business College 100037, China) 《Systems Science and Systems Engineering》 CSCD 1996年第3期361-366,共6页
This paper describes a new method which is different with the shadow price method to evaluate the economic benefits of the water source project. The approach is to take the water source as a constraint on the regiona... This paper describes a new method which is different with the shadow price method to evaluate the economic benefits of the water source project. The approach is to take the water source as a constraint on the regional economic development, calculate the difference between the generaded when the water source project is in operation and the gross product generated when the project is nonexistent, and then review the economic benefits on the project. For this purpose, we have constructed an input-output linear programming model and compiled a compatible using the routines for solving the input-output linear programming model. The above models and the routines have been used in paractical calculation of economic benefits of a water source project for a region. The computation result are satisfactory. 展开更多
关键词 economic evaluation of a Water Source Project SOURCE
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Economic Value Evaluation of Wetland Service in Yeyahu Wetland Nature Reserve,Beijing 被引量:9
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作者 ZHU Lin CHEN Yun +3 位作者 GONG Huili JIANG Weiguo ZHAO Wenji XIAO Yanfang 《Chinese Geographical Science》 SCIE CSCD 2011年第6期744-752,共9页
Based on multi-source data,this paper evaluated the economic value of ecological services in the Yeyahu Wetland Nature Reserve,Beijing,China.The ecological services of wetland included gas regulation,water quality im-... Based on multi-source data,this paper evaluated the economic value of ecological services in the Yeyahu Wetland Nature Reserve,Beijing,China.The ecological services of wetland included gas regulation,water quality im-provement,biodiversity maintenance,erosion control,water supply,recreational opportunity,raw material supply and existence value.Multiple conventional evaluation methods were used to calculate the value of eight wetland services.The results showed that significant values came from biodiversity maintenance and recreational opportunity.The main reasons were as follows.Firstly,Yeyahu Wetland Nature Reserve was the habitat for migrant birds,and government had payed more efforts to protect precious birds.Secondly,the population is large in Beijing.People enjoyed going outside and enjoyed the natural and artificial wetland scenes.At the same time,most people were prepared to pay for wetland conservation.The decline of vegetation cover made the economic value of erosion control the lowest.While the shrink of water resource and the deteriorative water quality caused the economic value of water supply lower.The evaluation results could help decision-makers understand the present status of the Yeyahu Wetland Nature Reserve and provide a scientific basis for strategic decision. 展开更多
关键词 economic value evaluation wetland service Yeyahu Wetland Nature Reserve BEIJING
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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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