AIM：To define the financial and management conditions required to introduce a femtosecond laser system for cataract surgery in a clinic using a fuzzy logic approach.METHODS：In the simulation performed in the current...AIM：To define the financial and management conditions required to introduce a femtosecond laser system for cataract surgery in a clinic using a fuzzy logic approach.METHODS：In the simulation performed in the current study,the costs associated to the acquisition and use of a commercially available femtosecond laser platform for cataract surgery（VICTUS,TECHNOLAS Perfect Vision GmbH,Bausch ＆ Lomb,Munich,Germany） during a period of 5y were considered.A sensitivity analysis was performed considering such costs and the countable amortization of the system during this 5y period.Furthermore,a fuzzy logic analysis was used to obtain an estimation of the money income associated to each femtosecond laser-assisted cataract surgery（G）. RESULTS：According to the sensitivity analysis,the femtosecond laser system under evaluation can be profitable if 1400 cataract surgeries are performed per year and if each surgery can be invoiced more than $500.In contrast,the fuzzy logic analysis confirmed that the patient had to pay more per surgery,between $661.8 and $667.4 per surgery,without considering the cost of the intraocular lens（IOL）.CONCLUSION：A profitability of femtosecond laser systems for cataract surgery can be obtained after a detailed financial analysis,especially in those centers with large volumes of patients.The cost of the surgery for patients should be adapted to the real flow of patients with the ability of paying a reasonable range of cost.展开更多
From the point of view of market economy, aiming at the flexible machiningproblem,this paper discusses how to determine the maximum profit-orientedoptimum preduction quantity, optimum cutting speed and optimum price u...From the point of view of market economy, aiming at the flexible machiningproblem,this paper discusses how to determine the maximum profit-orientedoptimum preduction quantity, optimum cutting speed and optimum price underthe condition of single machines,single type of product and limited resources.展开更多
The objectives of this study were to evaluate the return of investment and profitability of a bio-gasification facility using a modeling method.Based on preliminary market analysis,the results determined that the powe...The objectives of this study were to evaluate the return of investment and profitability of a bio-gasification facility using a modeling method.Based on preliminary market analysis,the results determined that the power facilities driven by biomass gasifiers could be profitable if they consider the most sensitive cost factors such as labor,project investment,and feedstock supply.The result showed that economic feasibility of bio-gasification facility can significantly affect by its production capacity and operating modes(one shift,two shifts,or three shifts).The cost analysis modeling approach developed in this study could be a good approach for economic analysis of bio-syngas and bio-fuel products.In addition,this study demonstrated a unique modeling approach to analyze return of investment and profitability of biofuels production.展开更多
Output continued recovery China’s cotton textile industry saw a a slight slump in growth rate of cotton yarn production and cotton cloth production in the first half of 2010 comparedto the Jan.
Profit turned positive According to data collected from 11,773 statistics-worthy Chinese cotton textile enterprises surveyed by National Bureau of Statistics of China,
Herein we study the economic performance of hydrochar and synthetic natural gas coproduction from olive tree pruning.The process entails a combination of hydrothermal carbonization and methanation.In a previous work,w...Herein we study the economic performance of hydrochar and synthetic natural gas coproduction from olive tree pruning.The process entails a combination of hydrothermal carbonization and methanation.In a previous work,we evidenced that standalone hydrochar production via HTC results unprofitable.Hence,we propose a step forward on the process design by implementing a methanation,adding value to the gas effluent in an attempt to boost the overall process techno-economic aspects.Three different plant capacities were analyzed(312.5,625 and 1250 kg/hr).The baseline scenarios showed that,under the current circumstances,our circular economy strategy in unprofitable.An analysis of the revenues shows that hydrochar selling price have a high impact on NPV and subsidies for renewable coal production could help to boost the profitability of the process.On the contrary,the analysis for natural gas prices reveals that prices 8 times higher than the current ones in Spain must be achieved to reach profitability.This seems unlikely even under the presence of a strong subsidy scheme.The costs analysis suggests that a remarkable electricity cost reduction or electricity consumption of the HTC stage could be a potential strategy to reach profitability scenarios.Furthermore,significant reduction of green hydrogen production costs is deemed instrumental to improve the economic performance of the process.These results show the formidable techno-economic challenge that our society faces in the path towards circular economy societies.展开更多
文摘AIM：To define the financial and management conditions required to introduce a femtosecond laser system for cataract surgery in a clinic using a fuzzy logic approach.METHODS：In the simulation performed in the current study,the costs associated to the acquisition and use of a commercially available femtosecond laser platform for cataract surgery（VICTUS,TECHNOLAS Perfect Vision GmbH,Bausch ＆ Lomb,Munich,Germany） during a period of 5y were considered.A sensitivity analysis was performed considering such costs and the countable amortization of the system during this 5y period.Furthermore,a fuzzy logic analysis was used to obtain an estimation of the money income associated to each femtosecond laser-assisted cataract surgery（G）. RESULTS：According to the sensitivity analysis,the femtosecond laser system under evaluation can be profitable if 1400 cataract surgeries are performed per year and if each surgery can be invoiced more than $500.In contrast,the fuzzy logic analysis confirmed that the patient had to pay more per surgery,between $661.8 and $667.4 per surgery,without considering the cost of the intraocular lens（IOL）.CONCLUSION：A profitability of femtosecond laser systems for cataract surgery can be obtained after a detailed financial analysis,especially in those centers with large volumes of patients.The cost of the surgery for patients should be adapted to the real flow of patients with the ability of paying a reasonable range of cost.
文摘From the point of view of market economy, aiming at the flexible machiningproblem,this paper discusses how to determine the maximum profit-orientedoptimum preduction quantity, optimum cutting speed and optimum price underthe condition of single machines,single type of product and limited resources.
基金This material is based upon work performed through the Sustainable Energy Research Center at Mississippi State University and is supported by the Department of Energy under Award Number DE-FG3606GO86025Micro CHP and Biofuel Center.Authors would like to acknowledge all the support of Drs.Fei Yu,and Hakkwan Kim,Dept.of Agricultural and Biological Engineering at Mississippi State University.
文摘The objectives of this study were to evaluate the return of investment and profitability of a bio-gasification facility using a modeling method.Based on preliminary market analysis,the results determined that the power facilities driven by biomass gasifiers could be profitable if they consider the most sensitive cost factors such as labor,project investment,and feedstock supply.The result showed that economic feasibility of bio-gasification facility can significantly affect by its production capacity and operating modes(one shift,two shifts,or three shifts).The cost analysis modeling approach developed in this study could be a good approach for economic analysis of bio-syngas and bio-fuel products.In addition,this study demonstrated a unique modeling approach to analyze return of investment and profitability of biofuels production.
文摘Output continued recovery China’s cotton textile industry saw a a slight slump in growth rate of cotton yarn production and cotton cloth production in the first half of 2010 comparedto the Jan.
文摘Profit turned positive According to data collected from 11,773 statistics-worthy Chinese cotton textile enterprises surveyed by National Bureau of Statistics of China,
基金supported by the grants FJC2021–047672-I and FJC2021–048089-Ico-financed by MCIN/AEI/10.13039/501100011033 and the European Union Next Generation EU/PRTR funds+1 种基金sponsored by Spanish Ministry of Science and Innovation through the project PLEC2021–008086 sponsored by MCIN/AEI/10.13039/501100011033 Next Generation Europe and Junta de Andalucía PAIDI program through the project P20_00667MZAMBRANO-2021–19889 excellence grant sponsored by the European Union Next Generation EU program。
文摘Herein we study the economic performance of hydrochar and synthetic natural gas coproduction from olive tree pruning.The process entails a combination of hydrothermal carbonization and methanation.In a previous work,we evidenced that standalone hydrochar production via HTC results unprofitable.Hence,we propose a step forward on the process design by implementing a methanation,adding value to the gas effluent in an attempt to boost the overall process techno-economic aspects.Three different plant capacities were analyzed(312.5,625 and 1250 kg/hr).The baseline scenarios showed that,under the current circumstances,our circular economy strategy in unprofitable.An analysis of the revenues shows that hydrochar selling price have a high impact on NPV and subsidies for renewable coal production could help to boost the profitability of the process.On the contrary,the analysis for natural gas prices reveals that prices 8 times higher than the current ones in Spain must be achieved to reach profitability.This seems unlikely even under the presence of a strong subsidy scheme.The costs analysis suggests that a remarkable electricity cost reduction or electricity consumption of the HTC stage could be a potential strategy to reach profitability scenarios.Furthermore,significant reduction of green hydrogen production costs is deemed instrumental to improve the economic performance of the process.These results show the formidable techno-economic challenge that our society faces in the path towards circular economy societies.
