Senior study travel,as an emerging form of tourism,combines the dual characteristics of educational learning and leisure travel.It not only meets the elderly’s desire for spiritual and cultural life and self-fulfillm...Senior study travel,as an emerging form of tourism,combines the dual characteristics of educational learning and leisure travel.It not only meets the elderly’s desire for spiritual and cultural life and self-fulfillment but also promotes the construction of a healthy aging society.This study comprehensively uses methods such as literature analysis,interviews,and case studies to analyze the current status and existing problems of the senior study travel market.Based on the 7Ps service marketing model,it explores service marketing strategies for the senior study travel market,aiming to provide reference and guidance for related tourism enterprises to supply more attractive senior study travel services.展开更多
Increasing penetration of distributed energy resources in the distribution network(DN)is threatening safe operation of the DN,which necessitates setup of the ancillary service market in the DN.In the ancillary service...Increasing penetration of distributed energy resources in the distribution network(DN)is threatening safe operation of the DN,which necessitates setup of the ancillary service market in the DN.In the ancillary service market,distribution system operator(DSO)is responsible for safety of the DN by procuring available capacities of aggregators.Unlike existing studies,this paper proposes a novel market mechanism composed of two parts:choice rule and payment rule.The proposed choice rule simultaneously considers social welfare and fairness,encouraging risk-averse aggregators to participate in the ancillary service market.It is then formulated as a linear programming problem,and a distributed solution using the multi-cut Benders decomposition is presented.Moreover,successful implementation of the choice rule depends on each aggregator’s truthful adoption of private parameters.Therefore,a payment rule is also designed,which is proved to possess two properties:incentive compatibility and individual rationality.Simulation results demonstrate effectiveness of the proposed choice rule on improving fairness and verify properties of the payment rule.展开更多
In cooperation with related com panies, China’s Foreign Trade provides services for Chinese market survey, Clients may entrust us for a survey on Chinese market for a particular product, chosen from the following lis...In cooperation with related com panies, China’s Foreign Trade provides services for Chinese market survey, Clients may entrust us for a survey on Chinese market for a particular product, chosen from the following list. The service fee for a survey on one product is US$500. Products to be surveyed:展开更多
In cooperation with related companies, China’s Foreign Trade provides services for Chinese market survey. Clients may entrust us for a survey on Chinese market for aparticular product, chosen from the following list....In cooperation with related companies, China’s Foreign Trade provides services for Chinese market survey. Clients may entrust us for a survey on Chinese market for aparticular product, chosen from the following list. The service fee for a survey on one product is US$500. Products to be surveyed: Chemical fibres, yarn, cloth, garment, knitwear, towels, knitting wool, woollen piecegoods, blankets, gunny sacks, silk, machine-made pulp, machine-展开更多
China Petroleum Technology & Development Corporation (CPTDC), a wholly owned subsidiary company of China National Petroleum Corporation (CNPC), is China's largest multinational company specializing in the manu...China Petroleum Technology & Development Corporation (CPTDC), a wholly owned subsidiary company of China National Petroleum Corporation (CNPC), is China's largest multinational company specializing in the manufacturing and supply of petroleum and petrochemical material, equipment and technology.展开更多
The Asia-Pacific Die Casting Industry Exhibition 2005. organized by Foundry Institution of Chinese Mechanical Engineering: Society (FICMES). was held in INTEX Shanghai, China on August 14-17. 2005. On August 16th. the...The Asia-Pacific Die Casting Industry Exhibition 2005. organized by Foundry Institution of Chinese Mechanical Engineering: Society (FICMES). was held in INTEX Shanghai, China on August 14-17. 2005. On August 16th. the journalists of CHINA FOUNDRY journal visited five exhibitors on the spot of exhibition. They are: Mr. Roland FINK. General manager of Frech (Shanghai) Die Casting Machine Co. Ltd.; Mr. Thomas STROBL. General manager of Buhler Equipment Engineering (Wuxi) Co. Ltd., Switzerland; Mr. WANG Tong. Manager of ABB Engineering (Shanghai) Co. Ltd : Ms Karen LUO. National Sales Manager-Die Casting. Chem-Trend (Shanghai) Trading Co. Ltd.; and Mr. David ZHOU. Sales Supervisor of Acheson. the National Starch & Chemical (Shanghai) Company1. Interview with Mr. Rolalnd FINK, General Manager, Freeh (Shanghai) Die Casting Machine Co. Ltd., and Mr. WU Hao-sen, Representative of Shanghai Office, Freeh ChinaReporter: The die casting machines Of Oskai Freeh GmbH are famous id the world. In order to let more renders know Oskar Frech GmbH. please intrkdluce its basic conditions.Mr. FINK. Oskar Frech GmbH was founded in 1949 and now has mure than 500 employees. It is a world-famous company specialized in research of die casting technology and manufacturing complete sets of equipment. There are a considerable number of Frech's products in the world die casting industry. Especially in the field of magnesium alloy die casting. Freeh's equipment are extensively employed, occupying the large part of the market. The assorted parts are available for Frech's equipment and customers can freely choose them. Frech produces not only hot chamber die casting machines bun also cold chamber die casting machines. Freeh continues to innovate or adopt new technologies lor die casting machines. Owing to the stable and reliable performances, Frech die casting machines are not only employed for production, hut also extensively served as experimental equipment. Either Frech cold chamber die casting machines or hot chamber die casting machines have real-time control (RC)ystems for injection. In 1980. Frech far Last Ltd. was established in Hong Kong by Oskar Frech GmbH. In 1987. Shanghai Office. Frech China was set up. And in May 2005. Frech built its subsidiary factory in Shanghai, to better serve for China and the whole Asia market.Reporter: Please introduce the performances and main features of die casting machines.Mr. FINK: Frech die casting machines are classified into different series for aluminum alloys, magnesium alloys and zinc alloys, respectively. The locking forces are from 20 tons to 2 000 tons. In 1966. Frech built the first hot chamber die easting machine for magnesium in the world. Now we have more than 40 years of experiences m the manufacture of magnesium die casting machines. Frech's equipment have such advantages as high service efficiency and excellent quality. Frech continues to develop and adopt advanced technologies for the security system, die locking system, injection system. control system and hydraulic system of die casting machines. In addition, the funcktional interfaces of Frech die casting machines are complete and the entire structure designs are reasonable. Frech die easting machines have large safety coefficients, stable performancesand long service life. As far as die casting dies are concerned. Frech has kept and developed its own tool room for die manufacturing, which can help customers solvc many problems of mould design and improve the quality of die castings.Reporter: This year Frech built the production factiory. in Shanghai, and this time Frech is joining the die casting exhibition in such a largescale.It is reflected that Frech is ambitious to develop itself in the China die casting market.Mr. FINK: In the past ten years, more than 200 die casting equipment of our company have been supplied to China, Up to present, we have built the production factoryo. in Shanghai, namely frech (Shanghai) Die Casting Machine Co. Ltd. This company uses the parts and components which are all produced originally in German factories to assemble die casting machines. So the performances and qualities of die casting machines produced in Shanghai are kept unchanged, but their prices are greatly reduced, being hetter suitable for the Chinese and Asian markets. Since June this year. some hot chamber die casting machines in locking forces from 20 tons to .315 tons have been assembled in Frech (Shanghai) Die Casting Machine Co.Ltd. And we are also ready to produce cold chamber die casting machines.Then we will gradually enlarge the production scale. Another importantthing is that we are preparing in the shortest time to provide our services after sale and the desired spare parts for our customers.Interview with Mr, Roland FINK. General Manager of Frech (Shanghai) Die Casting Machine Co Ltd .and Mr.WU Hao-sen. Representattive of Shanghai Offive,Frech China.2. Interview with Mr. Thomas STROBL, General Manager of Buhler Equipment Engineering (Wuxi) Co. Ltd., SwitzerlandReporter Mr. Thomas STOBER, How many times are there for your company to participate in the die casting exhibitions organized by Foundry Institution of Chinese Mechanical Fngineering Society?How do you think of this exhibition?Mr. STROBL: Buhler has taken pan in such exhibitions for five times. Certainly, this time the investment is the largest. since this is the first time for the real Buhler machine to be displayed. The displayed machine was made in Wuxi. China. The exhibition is very good.展开更多
In the wake of the inflow of international capital into China’s bicycle industry in the past decade, China’s domestic bicycle market is seeing fiercer competition, with production exceeding sales. The Phoenix Brand ...In the wake of the inflow of international capital into China’s bicycle industry in the past decade, China’s domestic bicycle market is seeing fiercer competition, with production exceeding sales. The Phoenix Brand bicycle, one of China’s ten famous brands, has been maintaining a high market share on the domestic market over the last展开更多
With the ever-increased installed capacity of renewable energy generation units in a power system,the so-called shared energy storage(SES),a novel business model under the umbrella of the shared economy principle,has ...With the ever-increased installed capacity of renewable energy generation units in a power system,the so-called shared energy storage(SES),a novel business model under the umbrella of the shared economy principle,has the potential to play an essential role in the accommodation of renewable energy generation.However,unified evaluation standards and methods,which can help decision-makers analyze the performance of the SES market,are still not available.In this paper,an evaluation index system of the SES market is designed based on the trading rules of China’s Qinghai province and the structure-conduct-performance(SCP)analytical model.Moreover,the definition and characteristics of the indices,which can show the performance of the SES market from different perspectives,are given.Furthermore,the ideal cases are presented as the evaluation benchmark based on the development expectation of the SES market,and the analytic hierarchy process(AHP)and the technique for order preference by similarity to an ideal solution(TOPSIS)are applied to evaluate the SES market comprehensively.Finally,a case study based on actual data of the SES trading pilot project in Qinghai shows that the evaluation index system can reflect the operation status,existing problems and influencing factors of the SES market.展开更多
The transition to low-carbon development has been recognized as one of the most important directions for the transformation of national economies in most countries.Today we can identify two of the most common service-...The transition to low-carbon development has been recognized as one of the most important directions for the transformation of national economies in most countries.Today we can identify two of the most common service-oriented logical models of this transition.These are models of Service-Dominant Logic and Product-Service Systems that are used in this study to create a service-oriented platformfor stimulating business development in the field of energy-related(ER)services.The establishment of such a platform is being considered based on the conceptual provisions of the global business ecosystem.Such a platform has been found to be a powerful tool for systemic coordinated cooperation between actors in the ER-services market and the relevant actors in the energy sector as well as in other industrial markets,unleashing the benefits of synergies,resulting from such cooperation.The logical models of attracting energy services companies to the creation of virtual communities(centers)for large-scale implementation of measures in the field of energy efficiency and renewable energy sources are presented in detail.The advantages of the practical implementation of logicalmodels are confirmed by calculations performed onmathematicalmodel adapted for engineering use in the field of ER-services.展开更多
The increasing penetration of renewables in power systems urgently entails the utilization of energy storage technologies.As the development of energy storage technologies depends highly on the profitability in electr...The increasing penetration of renewables in power systems urgently entails the utilization of energy storage technologies.As the development of energy storage technologies depends highly on the profitability in electricity markets,to evaluate the economic potentials for various types of energy storage technologies under the compre-hensive market environment is of great significance.To this end,this study aims at conducting a quantitative analysis on the economic potentials for typical energy storage technologies by establishing a joint clearing model for electric energy and ancillary service(AS)markets considering the operating features of energy storage systems(ESSs).Furthermore,a test system is adopted for numerical analysis that accurately represents for the real-world operation characteristics of power systems in China,with which the market prices,and operation schedules and profitability of ESSs are comparatively studied.The proposed methodology and results could provide benefi-cial references for the modifications on electricity markets and the development of ESSs towards the increasing penetration of renewables in power systems.展开更多
In this paper,the short-,medium-,and long-term effects of the COVID-19 pandemic on the Italian power system,particularly electricity consumption behavior and electricity market prices,are investigated by defining vari...In this paper,the short-,medium-,and long-term effects of the COVID-19 pandemic on the Italian power system,particularly electricity consumption behavior and electricity market prices,are investigated by defining various metrics.The investigation reveals that COVID-19 lockdown caused a drop in load consumption and,consequently,a decrement in day-ahead market prices and an increase in ancillary service prices.展开更多
The development of digital technology and the construction of smart cities urge service enterprises to seek competitive advantages by building smart service brands.However,there are few studies explore the brand value...The development of digital technology and the construction of smart cities urge service enterprises to seek competitive advantages by building smart service brands.However,there are few studies explore the brand value,brand strategies,and corresponding business strategies of smart service providers from the financial perspective.This paper selects listed property companies from China as the sample and explores the value of the smart community service brand of property enterprises based on the observation data.This research introduces the market value measurement index(Tobin q)and discounted cash flow model(DCF)to explore the influence of diversified brand strategies through combining smart brand strategy with naming strategies and business strategies on brand value.The results show that smart community service brand has a significant impact on firms'market value.Compared with the brand extension strategy,the adoption of brand renewal strategy will significantly affect market value.Further,the development of smart value-added services by enterprises will exert a positive impact on their market value.However,the stakeholders are not optimistic about smart technical services by property companies,which could reduce shareholders'expectations of the market value of enterprises.展开更多
The active distribution network(ADN)is able to manage distributed generators(DGs),active loads and storage facilities actively.It is also capable of purchasing electricity from main grid and providing ancillary servic...The active distribution network(ADN)is able to manage distributed generators(DGs),active loads and storage facilities actively.It is also capable of purchasing electricity from main grid and providing ancillary services through a flexible dispatching mode.A competitive market environment is beneficial for the exploration of ADN’s activeness in optimizing dispatch and bidding strategy.In a bilateral electricity market,the decision variables such as bid volume and price can influence the market clearing price(MCP).The MCP can also have impacts on the dispatch strategy of ADN at the same time.This paper proposes a bilevel coordinate dispatch model with fully consideration of the information interaction between main grid and ADN.Simulation results on a typical ADN validate the feasibility of the proposed method.A balanced proportion between energy market and ancillary services market can be achieved.展开更多
A novel non-linear stochastic method based on a Mixed-Integer Linear Programming(MILP)optimization model is proposed to optimally manage a high number of photovoltaic(PV)-battery systems for the provision of up and do...A novel non-linear stochastic method based on a Mixed-Integer Linear Programming(MILP)optimization model is proposed to optimally manage a high number of photovoltaic(PV)-battery systems for the provision of up and down regulation in the ancillary services market.This method,considers both the technical constraints of the power system,and those of the equipment used by all the prosumers.This allows an aggregator of many residential prosumers endowed with photovoltaic(PV)-battery systems to evaluate the baseline of the aggregate by minimizing the costs related to the electrical energy absorbed from the grid and then to assess the up and down flexibility curves with relative offer prices.As confirmed by simulation results carried out considering different realistic case studies,the method can effectively be used by an aggregator to evaluate the economic impact of its participation in the ancillary services market,both for the aggregator and for its prosumers.展开更多
基金Research Result of the Chongqing University of Science and Technology Graduate Innovation Program Project“Research on the Development of Senior Study Travel Products in Chongqing Based on the Enhancement of Happiness”(Project No.YKJCX2320903)。
文摘Senior study travel,as an emerging form of tourism,combines the dual characteristics of educational learning and leisure travel.It not only meets the elderly’s desire for spiritual and cultural life and self-fulfillment but also promotes the construction of a healthy aging society.This study comprehensively uses methods such as literature analysis,interviews,and case studies to analyze the current status and existing problems of the senior study travel market.Based on the 7Ps service marketing model,it explores service marketing strategies for the senior study travel market,aiming to provide reference and guidance for related tourism enterprises to supply more attractive senior study travel services.
基金supported by the National Natural Science Foundation of China(No.52177077).
文摘Increasing penetration of distributed energy resources in the distribution network(DN)is threatening safe operation of the DN,which necessitates setup of the ancillary service market in the DN.In the ancillary service market,distribution system operator(DSO)is responsible for safety of the DN by procuring available capacities of aggregators.Unlike existing studies,this paper proposes a novel market mechanism composed of two parts:choice rule and payment rule.The proposed choice rule simultaneously considers social welfare and fairness,encouraging risk-averse aggregators to participate in the ancillary service market.It is then formulated as a linear programming problem,and a distributed solution using the multi-cut Benders decomposition is presented.Moreover,successful implementation of the choice rule depends on each aggregator’s truthful adoption of private parameters.Therefore,a payment rule is also designed,which is proved to possess two properties:incentive compatibility and individual rationality.Simulation results demonstrate effectiveness of the proposed choice rule on improving fairness and verify properties of the payment rule.
文摘In cooperation with related com panies, China’s Foreign Trade provides services for Chinese market survey, Clients may entrust us for a survey on Chinese market for a particular product, chosen from the following list. The service fee for a survey on one product is US$500. Products to be surveyed:
文摘In cooperation with related companies, China’s Foreign Trade provides services for Chinese market survey. Clients may entrust us for a survey on Chinese market for aparticular product, chosen from the following list. The service fee for a survey on one product is US$500. Products to be surveyed: Chemical fibres, yarn, cloth, garment, knitwear, towels, knitting wool, woollen piecegoods, blankets, gunny sacks, silk, machine-made pulp, machine-
文摘China Petroleum Technology & Development Corporation (CPTDC), a wholly owned subsidiary company of China National Petroleum Corporation (CNPC), is China's largest multinational company specializing in the manufacturing and supply of petroleum and petrochemical material, equipment and technology.
文摘The Asia-Pacific Die Casting Industry Exhibition 2005. organized by Foundry Institution of Chinese Mechanical Engineering: Society (FICMES). was held in INTEX Shanghai, China on August 14-17. 2005. On August 16th. the journalists of CHINA FOUNDRY journal visited five exhibitors on the spot of exhibition. They are: Mr. Roland FINK. General manager of Frech (Shanghai) Die Casting Machine Co. Ltd.; Mr. Thomas STROBL. General manager of Buhler Equipment Engineering (Wuxi) Co. Ltd., Switzerland; Mr. WANG Tong. Manager of ABB Engineering (Shanghai) Co. Ltd : Ms Karen LUO. National Sales Manager-Die Casting. Chem-Trend (Shanghai) Trading Co. Ltd.; and Mr. David ZHOU. Sales Supervisor of Acheson. the National Starch & Chemical (Shanghai) Company1. Interview with Mr. Rolalnd FINK, General Manager, Freeh (Shanghai) Die Casting Machine Co. Ltd., and Mr. WU Hao-sen, Representative of Shanghai Office, Freeh ChinaReporter: The die casting machines Of Oskai Freeh GmbH are famous id the world. In order to let more renders know Oskar Frech GmbH. please intrkdluce its basic conditions.Mr. FINK. Oskar Frech GmbH was founded in 1949 and now has mure than 500 employees. It is a world-famous company specialized in research of die casting technology and manufacturing complete sets of equipment. There are a considerable number of Frech's products in the world die casting industry. Especially in the field of magnesium alloy die casting. Freeh's equipment are extensively employed, occupying the large part of the market. The assorted parts are available for Frech's equipment and customers can freely choose them. Frech produces not only hot chamber die casting machines bun also cold chamber die casting machines. Freeh continues to innovate or adopt new technologies lor die casting machines. Owing to the stable and reliable performances, Frech die casting machines are not only employed for production, hut also extensively served as experimental equipment. Either Frech cold chamber die casting machines or hot chamber die casting machines have real-time control (RC)ystems for injection. In 1980. Frech far Last Ltd. was established in Hong Kong by Oskar Frech GmbH. In 1987. Shanghai Office. Frech China was set up. And in May 2005. Frech built its subsidiary factory in Shanghai, to better serve for China and the whole Asia market.Reporter: Please introduce the performances and main features of die casting machines.Mr. FINK: Frech die casting machines are classified into different series for aluminum alloys, magnesium alloys and zinc alloys, respectively. The locking forces are from 20 tons to 2 000 tons. In 1966. Frech built the first hot chamber die easting machine for magnesium in the world. Now we have more than 40 years of experiences m the manufacture of magnesium die casting machines. Frech's equipment have such advantages as high service efficiency and excellent quality. Frech continues to develop and adopt advanced technologies for the security system, die locking system, injection system. control system and hydraulic system of die casting machines. In addition, the funcktional interfaces of Frech die casting machines are complete and the entire structure designs are reasonable. Frech die easting machines have large safety coefficients, stable performancesand long service life. As far as die casting dies are concerned. Frech has kept and developed its own tool room for die manufacturing, which can help customers solvc many problems of mould design and improve the quality of die castings.Reporter: This year Frech built the production factiory. in Shanghai, and this time Frech is joining the die casting exhibition in such a largescale.It is reflected that Frech is ambitious to develop itself in the China die casting market.Mr. FINK: In the past ten years, more than 200 die casting equipment of our company have been supplied to China, Up to present, we have built the production factoryo. in Shanghai, namely frech (Shanghai) Die Casting Machine Co. Ltd. This company uses the parts and components which are all produced originally in German factories to assemble die casting machines. So the performances and qualities of die casting machines produced in Shanghai are kept unchanged, but their prices are greatly reduced, being hetter suitable for the Chinese and Asian markets. Since June this year. some hot chamber die casting machines in locking forces from 20 tons to .315 tons have been assembled in Frech (Shanghai) Die Casting Machine Co.Ltd. And we are also ready to produce cold chamber die casting machines.Then we will gradually enlarge the production scale. Another importantthing is that we are preparing in the shortest time to provide our services after sale and the desired spare parts for our customers.Interview with Mr, Roland FINK. General Manager of Frech (Shanghai) Die Casting Machine Co Ltd .and Mr.WU Hao-sen. Representattive of Shanghai Offive,Frech China.2. Interview with Mr. Thomas STROBL, General Manager of Buhler Equipment Engineering (Wuxi) Co. Ltd., SwitzerlandReporter Mr. Thomas STOBER, How many times are there for your company to participate in the die casting exhibitions organized by Foundry Institution of Chinese Mechanical Fngineering Society?How do you think of this exhibition?Mr. STROBL: Buhler has taken pan in such exhibitions for five times. Certainly, this time the investment is the largest. since this is the first time for the real Buhler machine to be displayed. The displayed machine was made in Wuxi. China. The exhibition is very good.
文摘In the wake of the inflow of international capital into China’s bicycle industry in the past decade, China’s domestic bicycle market is seeing fiercer competition, with production exceeding sales. The Phoenix Brand bicycle, one of China’s ten famous brands, has been maintaining a high market share on the domestic market over the last
基金supported by the Science and Technology Project of State Grid Qinghai Electric Power Company(No.106000003367).
文摘With the ever-increased installed capacity of renewable energy generation units in a power system,the so-called shared energy storage(SES),a novel business model under the umbrella of the shared economy principle,has the potential to play an essential role in the accommodation of renewable energy generation.However,unified evaluation standards and methods,which can help decision-makers analyze the performance of the SES market,are still not available.In this paper,an evaluation index system of the SES market is designed based on the trading rules of China’s Qinghai province and the structure-conduct-performance(SCP)analytical model.Moreover,the definition and characteristics of the indices,which can show the performance of the SES market from different perspectives,are given.Furthermore,the ideal cases are presented as the evaluation benchmark based on the development expectation of the SES market,and the analytic hierarchy process(AHP)and the technique for order preference by similarity to an ideal solution(TOPSIS)are applied to evaluate the SES market comprehensively.Finally,a case study based on actual data of the SES trading pilot project in Qinghai shows that the evaluation index system can reflect the operation status,existing problems and influencing factors of the SES market.
文摘The transition to low-carbon development has been recognized as one of the most important directions for the transformation of national economies in most countries.Today we can identify two of the most common service-oriented logical models of this transition.These are models of Service-Dominant Logic and Product-Service Systems that are used in this study to create a service-oriented platformfor stimulating business development in the field of energy-related(ER)services.The establishment of such a platform is being considered based on the conceptual provisions of the global business ecosystem.Such a platform has been found to be a powerful tool for systemic coordinated cooperation between actors in the ER-services market and the relevant actors in the energy sector as well as in other industrial markets,unleashing the benefits of synergies,resulting from such cooperation.The logical models of attracting energy services companies to the creation of virtual communities(centers)for large-scale implementation of measures in the field of energy efficiency and renewable energy sources are presented in detail.The advantages of the practical implementation of logicalmodels are confirmed by calculations performed onmathematicalmodel adapted for engineering use in the field of ER-services.
基金Qinchuangyuan Cited High-level Innovation and Entrepreneurship Talents Project under(Grant No:2021QCYRC4-36)National Natural Science Fundation of China(Grant No.:72173095).
文摘The increasing penetration of renewables in power systems urgently entails the utilization of energy storage technologies.As the development of energy storage technologies depends highly on the profitability in electricity markets,to evaluate the economic potentials for various types of energy storage technologies under the compre-hensive market environment is of great significance.To this end,this study aims at conducting a quantitative analysis on the economic potentials for typical energy storage technologies by establishing a joint clearing model for electric energy and ancillary service(AS)markets considering the operating features of energy storage systems(ESSs).Furthermore,a test system is adopted for numerical analysis that accurately represents for the real-world operation characteristics of power systems in China,with which the market prices,and operation schedules and profitability of ESSs are comparatively studied.The proposed methodology and results could provide benefi-cial references for the modifications on electricity markets and the development of ESSs towards the increasing penetration of renewables in power systems.
文摘In this paper,the short-,medium-,and long-term effects of the COVID-19 pandemic on the Italian power system,particularly electricity consumption behavior and electricity market prices,are investigated by defining various metrics.The investigation reveals that COVID-19 lockdown caused a drop in load consumption and,consequently,a decrement in day-ahead market prices and an increase in ancillary service prices.
基金Supported by the National Natural Science Foundation of China (71972175)the National Social Science Foundation of China (20&ZD075)the National Key R&D Program of China (2017YFB1400400)。
文摘The development of digital technology and the construction of smart cities urge service enterprises to seek competitive advantages by building smart service brands.However,there are few studies explore the brand value,brand strategies,and corresponding business strategies of smart service providers from the financial perspective.This paper selects listed property companies from China as the sample and explores the value of the smart community service brand of property enterprises based on the observation data.This research introduces the market value measurement index(Tobin q)and discounted cash flow model(DCF)to explore the influence of diversified brand strategies through combining smart brand strategy with naming strategies and business strategies on brand value.The results show that smart community service brand has a significant impact on firms'market value.Compared with the brand extension strategy,the adoption of brand renewal strategy will significantly affect market value.Further,the development of smart value-added services by enterprises will exert a positive impact on their market value.However,the stakeholders are not optimistic about smart technical services by property companies,which could reduce shareholders'expectations of the market value of enterprises.
基金This work was supported by the National High Technology Research and Development Program of China(No.2014AA051902)State Grid Science&Technology Project(No.5217L0140009).
文摘The active distribution network(ADN)is able to manage distributed generators(DGs),active loads and storage facilities actively.It is also capable of purchasing electricity from main grid and providing ancillary services through a flexible dispatching mode.A competitive market environment is beneficial for the exploration of ADN’s activeness in optimizing dispatch and bidding strategy.In a bilateral electricity market,the decision variables such as bid volume and price can influence the market clearing price(MCP).The MCP can also have impacts on the dispatch strategy of ADN at the same time.This paper proposes a bilevel coordinate dispatch model with fully consideration of the information interaction between main grid and ADN.Simulation results on a typical ADN validate the feasibility of the proposed method.A balanced proportion between energy market and ancillary services market can be achieved.
文摘A novel non-linear stochastic method based on a Mixed-Integer Linear Programming(MILP)optimization model is proposed to optimally manage a high number of photovoltaic(PV)-battery systems for the provision of up and down regulation in the ancillary services market.This method,considers both the technical constraints of the power system,and those of the equipment used by all the prosumers.This allows an aggregator of many residential prosumers endowed with photovoltaic(PV)-battery systems to evaluate the baseline of the aggregate by minimizing the costs related to the electrical energy absorbed from the grid and then to assess the up and down flexibility curves with relative offer prices.As confirmed by simulation results carried out considering different realistic case studies,the method can effectively be used by an aggregator to evaluate the economic impact of its participation in the ancillary services market,both for the aggregator and for its prosumers.