As the global economy has been undergoing profound changes and the industrial and supply chains have been restructuring rapidly,China International Supply Chain Expo(hereinafter referred to as the CISCE)emerged with t...As the global economy has been undergoing profound changes and the industrial and supply chains have been restructuring rapidly,China International Supply Chain Expo(hereinafter referred to as the CISCE)emerged with the time.展开更多
Small-scale farmer is defined by the domestic and foreign experts and scholars.They point out that since the fragmentation of production and the diseconomy of scale in small-scale farmer is inconsistent with the chara...Small-scale farmer is defined by the domestic and foreign experts and scholars.They point out that since the fragmentation of production and the diseconomy of scale in small-scale farmer is inconsistent with the characteristics of scale and technology of modern agricultural production,it is necessary to eliminate the adverse effects of existing mode in order to provide theoretical references for the relevant researches.Citrus industry in Shimen County,Hunan Province,China is introduced from the aspects of natural geographical condition and socio-economic benefit.Impact of small-scale production mode on citrus production in Shimen County is discussed.Firstly,blindness of small-scale production is the main reason leading to overproduction of citrus.Secondly,small-scale production mode has limitation on the acceptance of new technologies,restricts the operation of geographical trademark,and constraints the enthusiasm of enterprises in entering the agricultural field.Finally,suggestions are put forward,such as encouraging the circulation of rural land,improving the organization degree of farmers,changing the work function of grass-roots government and perfecting the agricultural financial credit system.展开更多
The paper describes the characteristics of the intelligent manufacturing system and production mode in the 21st century in the information age, therefore draws a conclusion that the intelligent manufacturing system ad...The paper describes the characteristics of the intelligent manufacturing system and production mode in the 21st century in the information age, therefore draws a conclusion that the intelligent manufacturing system adapts to agile manufacture (AM for short) production mode in the 21st century.展开更多
Aiming at the characteristics of obvious block division and strong discreteness in the assembly production mode of electronic products,this paper proposes a composite U-shaped flexible assembly line model,and establis...Aiming at the characteristics of obvious block division and strong discreteness in the assembly production mode of electronic products,this paper proposes a composite U-shaped flexible assembly line model,and establishes a multi-objective optimization mathematical model on this basis.According to the characteristics of the model,the improved ranked positional weight(RPW)method is used to adjust the generation process of the initial solution of the genetic algorithm,so that the genetic algorithm can be applied to the block task model.At the same time,the adaptive cross mutation factor is used on the premise that tasks between different blocks are not crossed during cross mutation,which effectively improves the probability of excellent individuals retaining.After that,the algorithm is used to iterate to obtain the optimal solution task assignment.Finally,the algorithm results are compared with actual production data,which verifies the validity and feasibility of the assembly line model for discrete production mode proposed in this paper.展开更多
Multi-machine collaboration of agricultural machinery is one of the international frontier and hot research in the field of agricultural equipment.However,the current domestic multi-machine collaborative operation of ...Multi-machine collaboration of agricultural machinery is one of the international frontier and hot research in the field of agricultural equipment.However,the current domestic multi-machine collaborative operation of agricultural machinery is limited to the research of task goal planning and collaborative path optimization in a single production link.In order to achieve the purpose of zero inventory of agricultural materials and precise and efficient production operations,a new technology of agricultural machinery multi-machine collaboration with multi-dimension and full chain was proposed,which takes into account the whole process of agricultural production,as well as agricultural machinery system and external supply chain,storage and transportation chain collaboration.The problems of data collaboration,process collaboration and organization collaboration were analyzed.And the realization conditions of new multi-machine cooperative technology were analyzed.Meanwhile,the zero inventory mode and precise operation mode of agricultural materials under the background of multi-machine cooperation of intelligent agricultural machinery were studied.Then,a precise and efficient agricultural production mode based on data-process-organization collaboration was constructed.The results showed that the multi-machine cooperative technology mode of multi-dimensional and full-chain agricultural machinery could greatly improve the efficiency of agricultural machinery,operation quality,land utilization rate and reduce production cost.展开更多
Underground gas storages(UGSs)rebuilt from gas reservoirs is the most popular UGS type in the world.It accounts for 75%of the total active gas of all gas storages.In order to design more scientific and reliable geolog...Underground gas storages(UGSs)rebuilt from gas reservoirs is the most popular UGS type in the world.It accounts for 75%of the total active gas of all gas storages.In order to design more scientific and reliable geological schemes for constructing the underground gas storages rebuilt from gas reservoirs and optimize the UGS operation parameters,we analyzed the UGS basic characteristics of multi-cycle high-rate injection and production.Then,the dynamic sealing capacity of traps and the wateregas high-speed interactive flow mechanism of UGSs rebuilt from gas reservoirs with complex geological conditions were investigated by both physical simulation and numerical simulation.Finally,the key technologies for evaluating the dynamic sealing capacity of caprocks and faults and the storage capacity parameters were developed.Some results were obtained.First,the alternating stress in the process of UGS injection and production weakens the original static capillary sealing capacity and mechanical integrity of caprocks to different extents,and the trap sealing capacity can be quantified and evaluated comprehensively by using dynamic breakthrough pressures,shear safety indexes and other indicators.Second,a UGS capacity design method based on effective gas-bearing pores was developed according to the local pore-based recovery mechanism revealed in the high-speed gasewater mutual flooding test.Field application in the multi-layer UGS of H shows that these technologies provide an effective guidance for the design of geologic schemes.After five cycles of injection and production,its ramp-up ratio reached 91.8%and the peak shaving capacity increased quickly to 36.3×10^(8)m^(3)from 2.7×10^(8)m^(3)in the early stage of production.Moreover,the operation indicators matched well with the design.展开更多
The specific production area,unique production environment,rich humanistic history and unique production quality of Zhengcheng honeysuckle,a featured product of Pingyi County,Shandong Province and a national geographi...The specific production area,unique production environment,rich humanistic history and unique production quality of Zhengcheng honeysuckle,a featured product of Pingyi County,Shandong Province and a national geographic indication agricultural product are described in this article.The unique production method for Zhengcheng honeysuckle is summarized from the aspects of production area selection,variety selection,production management,harvesting,processing and packaging,and corresponding development measures for the industry are proposed,aiming to maintain the Zhengcheng honeysuckle brand to the greatest extent and further increase the popularity of Zhengcheng honeysuckle.展开更多
Marx’s production paradigm constitutes the logical premise of his construction of machine production theory.Therefore,the machine production theory elaborated by Marx has a unique research method and theoretical pers...Marx’s production paradigm constitutes the logical premise of his construction of machine production theory.Therefore,the machine production theory elaborated by Marx has a unique research method and theoretical perspective,which is fundamentally different from other non-Marxist technical theories,which is also the basic starting point for understanding and explaining Marx’s machine production theory.By defining the logical premise of Marx’s machine production theory as production paradigm,we can not only reinterpret this theory based on the original context,but also examine the latest interaction between contemporary capitalism and technological reality on the basis of this interpretation.Only from the production paradigm can we truly grasp the complete connotation of“machine production”in Marx’s mature criticism of political economy.展开更多
This paper identifies three stages in China's agricultural development with reference to macroeconomic development and international experience.While the first two stages focused on ensuring food security and rais...This paper identifies three stages in China's agricultural development with reference to macroeconomic development and international experience.While the first two stages focused on ensuring food security and raising farmer's income,the current stage must give priority to modernizing agricultural production.The lack of progress in this area is due to the following reasons:diminishing return to capital as a result of small and scattered farming operation which has compromised agricultural competitiveness;agriculture is overdependent on subsidy and protection under the conventional wisdom of the uniqueness of agriculture.This paper attempts to reveal the barriers to China s agricultural modernization and proposes recommendations on reforming the land and household registration systems to increase the economies of scale and productivity.展开更多
The development of businesses in the Internet era has shifted from channel to scale,to users and word of mouth.By utilizing the fans economy,the mode of explosive products has become an effective mode for focusing on ...The development of businesses in the Internet era has shifted from channel to scale,to users and word of mouth.By utilizing the fans economy,the mode of explosive products has become an effective mode for focusing on core products,efficiently detonating the market,quickly acquiring users,and realizing enterprise development.This paper conducts pertinent analysis and research.It discusses how to distinguish between explosive products,explosive products,and explosive products,as well as the relevant capabilities required to build explosive products.Finally,in conjunction with the current situation,it discusses how to establish a mode of explosive products for enterprises in order to realize enterprise growth and profit.展开更多
The Sinian Dengying Fm in the Sichuan Basin is a set of fractured-vuggy reservoirs mainly dominated by sedimentation and karstification,and characterized by small fractures and vugs,complex stratigraphy and lithology,...The Sinian Dengying Fm in the Sichuan Basin is a set of fractured-vuggy reservoirs mainly dominated by sedimentation and karstification,and characterized by small fractures and vugs,complex stratigraphy and lithology,and strong vertical and lateral reservoir heterogeneity.As a result,the drilling rates are lower and single-well gas productivity varies greatly there.And the reservoir identification results based on seismic data in this area are ambiguous.In view of this,the Deng 4 Member in the Gaoshiti buried structure on the southern flank of the LeshaneLongnusi palaeohigh was precisely divided in stratigraphy.Then,the types of reservoir assemblages were determined based on gas well logging and test data,and the seismic response characteristics of typical wells with different types of reservoir assemblages and the seismic modes of high productivity wells were studied by using high-resolution seismic data.It is indicated that the Deng 4 Member in this area is divided into three types of reservoir assemblages,which correspond to three seismic modes.Seismic mode I:It presents the seismic response characteristics of“wide wave troughs+double highlights”or“wide wave troughs+complex waves”,indicating that fractures and vugs are developed.It is the preferred seismic mode of high productivity wells in the stage of development.In this mode,the technology of highly deviated wells or horizontal wells can be implemented.Seismic mode II:It presents the seismic response characteristics of“wide wave troughs”,indicating that fractures and vugs are relatively developed.It is the mode of moderate productivity wells.In this mode,the technology of highly deviated wells can be implemented.Seismic mode III:It presents the seismic response characteristics of“wide wave troughs+highlights”,indicating that fractures and vugs are underdeveloped.It is mode of low productivity wells,in which the technology of horizontal wells can be implemented.The new understandings on seismic modes were applied on site.It is shown that the reservoir drilling rate is over 60%and the average gas production rate during the production test of 8 wells is up to 75.34×10^(4)m^(3)/d.It is concluded that the seismic mode of high productivity wells based on seismic facies,fracture and vug prediction and integrated target design provides a support for the well arrangement and drilling trajectory adjustment in natural gas exploration and development in the Gaoshiti area and good results have been achieved.展开更多
This paper has announced the arrival of new economic era through an analysis of Nike＇s management mode. The traditional industry classification can＇t meet demands of industry development. We should inherit and impro...This paper has announced the arrival of new economic era through an analysis of Nike＇s management mode. The traditional industry classification can＇t meet demands of industry development. We should inherit and improve traditional economy in order to adapt to the development demand of new economy.展开更多
This paper introduces a new type machine for polyblends with excellent mixing capabilities of internal mixer and continuous molding character of extruder.The machine includes two functions - mixing and extrusion moldi...This paper introduces a new type machine for polyblends with excellent mixing capabilities of internal mixer and continuous molding character of extruder.The machine includes two functions - mixing and extrusion molding that have been composed together by rational design,so a tandem production mode - "batch + continuous" are opened up.The mathematical model of continuous mixing molding was established and verified availably by experimental research.The main physical mechanical property of vulcanizate,which had met national waterproof material standard,verified the machine practicability.The essential difference from other similar type machines is that this machine is not only suitable in producing granular and powder rubbers but also lumpish rubbers.展开更多
High-pressure deep shale gas reservoirs are usually highly stress-sensitive.When the reasonable production mode of shale gas well is built,the impact of strong stress sensitivity should be fully considered.First,this ...High-pressure deep shale gas reservoirs are usually highly stress-sensitive.When the reasonable production mode of shale gas well is built,the impact of strong stress sensitivity should be fully considered.First,this study calculated the relationship between permeability and formation pressure under different elastic modulus based on the shale lithology of Long Ma Xi formation in Sichuan Basin by testing and analysing the mechanical parameters of the rock.According to numerical simulation result,when the elastic modulus exceeds 14.0 GPa,the stress sensitivity of the matrix will slight affect the cumulative gas production of shale gas.Second,the changing relation between fracture conductivity and permeability with fracture pressure and the time of pressure acts were experimentally studied.The numerical simulation result suggested that the 30-year cumulative gas production considering the stress sensitivity was reduced by 13.5%compared with the 30-year cumulative gas production without considering the stress sensitivity.Finally,the production of different production modes under different stress sensitive characteristics was predicted using numerical simulation method.When the matrix and fractures are fixed with a same stress-sensitive curve,the initial production allocation will not significantly impact the cumulative gas production.When the fractured fractures are subjected to a varying stress sensitive curve,the lower production allocation will result in higher post-production and cumulative gas production.展开更多
Discussions on Marx＇s ＂Asiatic mode of production＂ are essentially about the relationship between the universal and the particularistic view of history. Marx adhered to the world history position, but in the course...Discussions on Marx＇s ＂Asiatic mode of production＂ are essentially about the relationship between the universal and the particularistic view of history. Marx adhered to the world history position, but in the course of formulating his theory of the Asiatic mode of production he moved from universal history to a particularistic view of history; whereas the shift from the ＂Russian path＂ and ＂Russian way＂ provided by the Russian revolution to Stalin＇s doctrine of the ＂five forms＂ of social development represented a return from particularistic to universal history. In developing a Chinese view of history, three elements cannot be overlooked： the Chinese pattern of historical development and China＇s present development experience; Marx＇s theory of social forms and his thoughts on Oriental society in his later years; and the ＂Russian path＂ and ＂systemic transformation＂ launched by the October Revolution.展开更多
In the context of the global low-carbon economy,the carbon cap-and-trade mechanism(CCATM)plays an important impact on the production and trade of enterprises and is widely implemented by most governments to reduce car...In the context of the global low-carbon economy,the carbon cap-and-trade mechanism(CCATM)plays an important impact on the production and trade of enterprises and is widely implemented by most governments to reduce carbon emissions.In this paper,we investigate a two-stage supply chain game model with a stochastic demand under the CCATM,in which the manufacturer has two production modes and the retailer has two order opportunities,and both of them make green effort.The results show that the optimal decision is irrelevant to carbon cap while is relevant to carbon emissions per unit product.The profits of both the manufacturer and the retailer increase under the CCATM.Furthermore,we explore the optimal decisions under the buyback contract and the payment contract provided by the manufacturer to the retailer.We find that the transfer payment can't improve the profit while the buyback contract can do.We further extend our model by investigating the scenario with the risk-averse channel members,and find that the first optimal order quantity of the retailer would reduce due to risk aversion,while the manufacturer would invest more green effort and the manufacturer would be more likely to cooperate with alowerrisk-averse retailer.展开更多
In typical EGS fracturing projects,the fracture network is denser in the region close to the fracturing wells.The distribution of fractures has a significant impact on the heat extraction performance of enhanced geoth...In typical EGS fracturing projects,the fracture network is denser in the region close to the fracturing wells.The distribution of fractures has a significant impact on the heat extraction performance of enhanced geothermal system(EGS).In order to avoid premature thermal breakthrough and improve the thermal extraction efficiency,this paper studies the heat extraction performance of EGS in heterogeneous fractured reservoirs under different injection-production methods.First,a heterogeneous discrete fracture network generation method based on relative pressure distribution is developed.A thermo-hydraulic-mechanical(THM)coupling model is established to simulate the fluid flow and heat transfer in reservoirs.The heat extraction performance under different production and injection modes is compared with different fracture densities.The results show that injection in the dense side of the anti-parallel well configuration will be more efficient for heat extraction.Under the condition of same injection mass flow rate,the heat extraction performance is positively correlated with the fracture density.Although sparse-side injection is not conducive to fluid flow,under the condition of same injection mass flow rate with anti-parallel well configuration,it will improve the thermal extraction performance.展开更多
The floriculture industry is experiencing rapid growth with high profitability driven by its irreplaceable symbolic,therapeutic,and emotional value for decorative and aesthetic purposes.However,this prosperity comes w...The floriculture industry is experiencing rapid growth with high profitability driven by its irreplaceable symbolic,therapeutic,and emotional value for decorative and aesthetic purposes.However,this prosperity comes with significant environmental costs,as the industry's pursuit of high-quality flower production is largely shaped by profit-driven motives.This thus creates a paradox:while flowers symbolize natural beauty and harmony,their unsustainable production modes undermine these very ideals.In this context,it is emphasized that floral plants can be both economically important and ecologically significant,particularly their functional roles in supporting key components of terrestrial ecosystems.Two potential applications of floral plants in the agroecosystem are proposed:flower strips in agricultural systems and flower meadows comprising halophytes and hyperaccumulators in degraded landscapes.By harnessing the potential functional diversity of floral plants to provide their respective ecological services,it offers an alternative pathway for the floriculture industry to evolve toward a future that balances beauty with sustainability.展开更多
Ecological civilization,which refers to the harmonious development of man and the nature,has the connotation of the ecological material civilization,ecological consciousness civilization,ecological institutional civil...Ecological civilization,which refers to the harmonious development of man and the nature,has the connotation of the ecological material civilization,ecological consciousness civilization,ecological institutional civilization and ecological behavior civilization.The research on ecological civilization evaluation index system is important in that it can provide the guidance for the construction of ecological civilization,and besides it can improve public recognition of the importance of ecological civilization to the level that they will personally contribute to the development of ecological civilization.The paper attempts to set up an evaluation index system for ecological civilization construction based on consulting to relevant documents,in a bid to provide some policy references for relevant departments.展开更多
文摘As the global economy has been undergoing profound changes and the industrial and supply chains have been restructuring rapidly,China International Supply Chain Expo(hereinafter referred to as the CISCE)emerged with the time.
文摘Small-scale farmer is defined by the domestic and foreign experts and scholars.They point out that since the fragmentation of production and the diseconomy of scale in small-scale farmer is inconsistent with the characteristics of scale and technology of modern agricultural production,it is necessary to eliminate the adverse effects of existing mode in order to provide theoretical references for the relevant researches.Citrus industry in Shimen County,Hunan Province,China is introduced from the aspects of natural geographical condition and socio-economic benefit.Impact of small-scale production mode on citrus production in Shimen County is discussed.Firstly,blindness of small-scale production is the main reason leading to overproduction of citrus.Secondly,small-scale production mode has limitation on the acceptance of new technologies,restricts the operation of geographical trademark,and constraints the enthusiasm of enterprises in entering the agricultural field.Finally,suggestions are put forward,such as encouraging the circulation of rural land,improving the organization degree of farmers,changing the work function of grass-roots government and perfecting the agricultural financial credit system.
文摘The paper describes the characteristics of the intelligent manufacturing system and production mode in the 21st century in the information age, therefore draws a conclusion that the intelligent manufacturing system adapts to agile manufacture (AM for short) production mode in the 21st century.
文摘Aiming at the characteristics of obvious block division and strong discreteness in the assembly production mode of electronic products,this paper proposes a composite U-shaped flexible assembly line model,and establishes a multi-objective optimization mathematical model on this basis.According to the characteristics of the model,the improved ranked positional weight(RPW)method is used to adjust the generation process of the initial solution of the genetic algorithm,so that the genetic algorithm can be applied to the block task model.At the same time,the adaptive cross mutation factor is used on the premise that tasks between different blocks are not crossed during cross mutation,which effectively improves the probability of excellent individuals retaining.After that,the algorithm is used to iterate to obtain the optimal solution task assignment.Finally,the algorithm results are compared with actual production data,which verifies the validity and feasibility of the assembly line model for discrete production mode proposed in this paper.
基金financially supported by Major Science and Technology Projects in Xinjiang Autonomous Region(Grant No.2022A02005-5)the National Natural Science Foundation of China(Grant No.32071905)the Priority Academic Program Development of Jiangsu Higher Education Institutions(Grant No.PAPD-2023-87).
文摘Multi-machine collaboration of agricultural machinery is one of the international frontier and hot research in the field of agricultural equipment.However,the current domestic multi-machine collaborative operation of agricultural machinery is limited to the research of task goal planning and collaborative path optimization in a single production link.In order to achieve the purpose of zero inventory of agricultural materials and precise and efficient production operations,a new technology of agricultural machinery multi-machine collaboration with multi-dimension and full chain was proposed,which takes into account the whole process of agricultural production,as well as agricultural machinery system and external supply chain,storage and transportation chain collaboration.The problems of data collaboration,process collaboration and organization collaboration were analyzed.And the realization conditions of new multi-machine cooperative technology were analyzed.Meanwhile,the zero inventory mode and precise operation mode of agricultural materials under the background of multi-machine cooperation of intelligent agricultural machinery were studied.Then,a precise and efficient agricultural production mode based on data-process-organization collaboration was constructed.The results showed that the multi-machine cooperative technology mode of multi-dimensional and full-chain agricultural machinery could greatly improve the efficiency of agricultural machinery,operation quality,land utilization rate and reduce production cost.
基金supported by PetroChina Major Science and Technology Project“Study and application of geological and gas reservoir engineering technologies for underground gas storages”(No.:2015E-4002).
文摘Underground gas storages(UGSs)rebuilt from gas reservoirs is the most popular UGS type in the world.It accounts for 75%of the total active gas of all gas storages.In order to design more scientific and reliable geological schemes for constructing the underground gas storages rebuilt from gas reservoirs and optimize the UGS operation parameters,we analyzed the UGS basic characteristics of multi-cycle high-rate injection and production.Then,the dynamic sealing capacity of traps and the wateregas high-speed interactive flow mechanism of UGSs rebuilt from gas reservoirs with complex geological conditions were investigated by both physical simulation and numerical simulation.Finally,the key technologies for evaluating the dynamic sealing capacity of caprocks and faults and the storage capacity parameters were developed.Some results were obtained.First,the alternating stress in the process of UGS injection and production weakens the original static capillary sealing capacity and mechanical integrity of caprocks to different extents,and the trap sealing capacity can be quantified and evaluated comprehensively by using dynamic breakthrough pressures,shear safety indexes and other indicators.Second,a UGS capacity design method based on effective gas-bearing pores was developed according to the local pore-based recovery mechanism revealed in the high-speed gasewater mutual flooding test.Field application in the multi-layer UGS of H shows that these technologies provide an effective guidance for the design of geologic schemes.After five cycles of injection and production,its ramp-up ratio reached 91.8%and the peak shaving capacity increased quickly to 36.3×10^(8)m^(3)from 2.7×10^(8)m^(3)in the early stage of production.Moreover,the operation indicators matched well with the design.
基金Chinese Herbal Medicine Industrial Innovation Team in Shandong Provincial Modern Agricultural Industrial Technology System:Linyi Comprehensive Experimental Station Construction Project(SDAIT-20-9).
文摘The specific production area,unique production environment,rich humanistic history and unique production quality of Zhengcheng honeysuckle,a featured product of Pingyi County,Shandong Province and a national geographic indication agricultural product are described in this article.The unique production method for Zhengcheng honeysuckle is summarized from the aspects of production area selection,variety selection,production management,harvesting,processing and packaging,and corresponding development measures for the industry are proposed,aiming to maintain the Zhengcheng honeysuckle brand to the greatest extent and further increase the popularity of Zhengcheng honeysuckle.
文摘Marx’s production paradigm constitutes the logical premise of his construction of machine production theory.Therefore,the machine production theory elaborated by Marx has a unique research method and theoretical perspective,which is fundamentally different from other non-Marxist technical theories,which is also the basic starting point for understanding and explaining Marx’s machine production theory.By defining the logical premise of Marx’s machine production theory as production paradigm,we can not only reinterpret this theory based on the original context,but also examine the latest interaction between contemporary capitalism and technological reality on the basis of this interpretation.Only from the production paradigm can we truly grasp the complete connotation of“machine production”in Marx’s mature criticism of political economy.
文摘This paper identifies three stages in China's agricultural development with reference to macroeconomic development and international experience.While the first two stages focused on ensuring food security and raising farmer's income,the current stage must give priority to modernizing agricultural production.The lack of progress in this area is due to the following reasons:diminishing return to capital as a result of small and scattered farming operation which has compromised agricultural competitiveness;agriculture is overdependent on subsidy and protection under the conventional wisdom of the uniqueness of agriculture.This paper attempts to reveal the barriers to China s agricultural modernization and proposes recommendations on reforming the land and household registration systems to increase the economies of scale and productivity.
文摘The development of businesses in the Internet era has shifted from channel to scale,to users and word of mouth.By utilizing the fans economy,the mode of explosive products has become an effective mode for focusing on core products,efficiently detonating the market,quickly acquiring users,and realizing enterprise development.This paper conducts pertinent analysis and research.It discusses how to distinguish between explosive products,explosive products,and explosive products,as well as the relevant capabilities required to build explosive products.Finally,in conjunction with the current situation,it discusses how to establish a mode of explosive products for enterprises in order to realize enterprise growth and profit.
基金supported by the National Major Science and Technology Project“Development and Demonstration Project of Large Carbonate Gas Fields in Sichuan Basin”(No.2016ZX05052).
文摘The Sinian Dengying Fm in the Sichuan Basin is a set of fractured-vuggy reservoirs mainly dominated by sedimentation and karstification,and characterized by small fractures and vugs,complex stratigraphy and lithology,and strong vertical and lateral reservoir heterogeneity.As a result,the drilling rates are lower and single-well gas productivity varies greatly there.And the reservoir identification results based on seismic data in this area are ambiguous.In view of this,the Deng 4 Member in the Gaoshiti buried structure on the southern flank of the LeshaneLongnusi palaeohigh was precisely divided in stratigraphy.Then,the types of reservoir assemblages were determined based on gas well logging and test data,and the seismic response characteristics of typical wells with different types of reservoir assemblages and the seismic modes of high productivity wells were studied by using high-resolution seismic data.It is indicated that the Deng 4 Member in this area is divided into three types of reservoir assemblages,which correspond to three seismic modes.Seismic mode I:It presents the seismic response characteristics of“wide wave troughs+double highlights”or“wide wave troughs+complex waves”,indicating that fractures and vugs are developed.It is the preferred seismic mode of high productivity wells in the stage of development.In this mode,the technology of highly deviated wells or horizontal wells can be implemented.Seismic mode II:It presents the seismic response characteristics of“wide wave troughs”,indicating that fractures and vugs are relatively developed.It is the mode of moderate productivity wells.In this mode,the technology of highly deviated wells can be implemented.Seismic mode III:It presents the seismic response characteristics of“wide wave troughs+highlights”,indicating that fractures and vugs are underdeveloped.It is mode of low productivity wells,in which the technology of horizontal wells can be implemented.The new understandings on seismic modes were applied on site.It is shown that the reservoir drilling rate is over 60%and the average gas production rate during the production test of 8 wells is up to 75.34×10^(4)m^(3)/d.It is concluded that the seismic mode of high productivity wells based on seismic facies,fracture and vug prediction and integrated target design provides a support for the well arrangement and drilling trajectory adjustment in natural gas exploration and development in the Gaoshiti area and good results have been achieved.
文摘This paper has announced the arrival of new economic era through an analysis of Nike＇s management mode. The traditional industry classification can＇t meet demands of industry development. We should inherit and improve traditional economy in order to adapt to the development demand of new economy.
基金National Natural Science Foundation of China(No.50375075)
文摘This paper introduces a new type machine for polyblends with excellent mixing capabilities of internal mixer and continuous molding character of extruder.The machine includes two functions - mixing and extrusion molding that have been composed together by rational design,so a tandem production mode - "batch + continuous" are opened up.The mathematical model of continuous mixing molding was established and verified availably by experimental research.The main physical mechanical property of vulcanizate,which had met national waterproof material standard,verified the machine practicability.The essential difference from other similar type machines is that this machine is not only suitable in producing granular and powder rubbers but also lumpish rubbers.
文摘High-pressure deep shale gas reservoirs are usually highly stress-sensitive.When the reasonable production mode of shale gas well is built,the impact of strong stress sensitivity should be fully considered.First,this study calculated the relationship between permeability and formation pressure under different elastic modulus based on the shale lithology of Long Ma Xi formation in Sichuan Basin by testing and analysing the mechanical parameters of the rock.According to numerical simulation result,when the elastic modulus exceeds 14.0 GPa,the stress sensitivity of the matrix will slight affect the cumulative gas production of shale gas.Second,the changing relation between fracture conductivity and permeability with fracture pressure and the time of pressure acts were experimentally studied.The numerical simulation result suggested that the 30-year cumulative gas production considering the stress sensitivity was reduced by 13.5%compared with the 30-year cumulative gas production without considering the stress sensitivity.Finally,the production of different production modes under different stress sensitive characteristics was predicted using numerical simulation method.When the matrix and fractures are fixed with a same stress-sensitive curve,the initial production allocation will not significantly impact the cumulative gas production.When the fractured fractures are subjected to a varying stress sensitive curve,the lower production allocation will result in higher post-production and cumulative gas production.
文摘Discussions on Marx＇s ＂Asiatic mode of production＂ are essentially about the relationship between the universal and the particularistic view of history. Marx adhered to the world history position, but in the course of formulating his theory of the Asiatic mode of production he moved from universal history to a particularistic view of history; whereas the shift from the ＂Russian path＂ and ＂Russian way＂ provided by the Russian revolution to Stalin＇s doctrine of the ＂five forms＂ of social development represented a return from particularistic to universal history. In developing a Chinese view of history, three elements cannot be overlooked： the Chinese pattern of historical development and China＇s present development experience; Marx＇s theory of social forms and his thoughts on Oriental society in his later years; and the ＂Russian path＂ and ＂systemic transformation＂ launched by the October Revolution.
基金The authors thank an associate editor and anonymous referees for their numerous con-structive comments and encouragement that have helped improve our paper greatly.This research was partly supported by the National Natural Science Foundation of China under Grant Nos.71971113 and 71571100Natural Science Research Project of Colleges and Universities in Anhui Province under Grant Nos.KJ2021A1054 and KJ2020A09.
文摘In the context of the global low-carbon economy,the carbon cap-and-trade mechanism(CCATM)plays an important impact on the production and trade of enterprises and is widely implemented by most governments to reduce carbon emissions.In this paper,we investigate a two-stage supply chain game model with a stochastic demand under the CCATM,in which the manufacturer has two production modes and the retailer has two order opportunities,and both of them make green effort.The results show that the optimal decision is irrelevant to carbon cap while is relevant to carbon emissions per unit product.The profits of both the manufacturer and the retailer increase under the CCATM.Furthermore,we explore the optimal decisions under the buyback contract and the payment contract provided by the manufacturer to the retailer.We find that the transfer payment can't improve the profit while the buyback contract can do.We further extend our model by investigating the scenario with the risk-averse channel members,and find that the first optimal order quantity of the retailer would reduce due to risk aversion,while the manufacturer would invest more green effort and the manufacturer would be more likely to cooperate with alowerrisk-averse retailer.
基金supported by the Key Research and Development Program of China(No.2021YFB150740502).
文摘In typical EGS fracturing projects,the fracture network is denser in the region close to the fracturing wells.The distribution of fractures has a significant impact on the heat extraction performance of enhanced geothermal system(EGS).In order to avoid premature thermal breakthrough and improve the thermal extraction efficiency,this paper studies the heat extraction performance of EGS in heterogeneous fractured reservoirs under different injection-production methods.First,a heterogeneous discrete fracture network generation method based on relative pressure distribution is developed.A thermo-hydraulic-mechanical(THM)coupling model is established to simulate the fluid flow and heat transfer in reservoirs.The heat extraction performance under different production and injection modes is compared with different fracture densities.The results show that injection in the dense side of the anti-parallel well configuration will be more efficient for heat extraction.Under the condition of same injection mass flow rate,the heat extraction performance is positively correlated with the fracture density.Although sparse-side injection is not conducive to fluid flow,under the condition of same injection mass flow rate with anti-parallel well configuration,it will improve the thermal extraction performance.
基金supported by the Talent cultivation funding supported by Yunnan Academy of Agricultural Sciences(2023RCYP-06)the Scientific and Technological Talents and Platform Program of Yunnan Province(Academician Expert Workstation)(202305AF150165)the Xingdian Talent Support Project(CYRC2020004).
文摘The floriculture industry is experiencing rapid growth with high profitability driven by its irreplaceable symbolic,therapeutic,and emotional value for decorative and aesthetic purposes.However,this prosperity comes with significant environmental costs,as the industry's pursuit of high-quality flower production is largely shaped by profit-driven motives.This thus creates a paradox:while flowers symbolize natural beauty and harmony,their unsustainable production modes undermine these very ideals.In this context,it is emphasized that floral plants can be both economically important and ecologically significant,particularly their functional roles in supporting key components of terrestrial ecosystems.Two potential applications of floral plants in the agroecosystem are proposed:flower strips in agricultural systems and flower meadows comprising halophytes and hyperaccumulators in degraded landscapes.By harnessing the potential functional diversity of floral plants to provide their respective ecological services,it offers an alternative pathway for the floriculture industry to evolve toward a future that balances beauty with sustainability.
基金supported by the project of A Study of Ecological Civilization Evaluation Indicator System(CAFYBB2008030)from a speical fund for basic scientific studies of public welfare research institutes at central government level
文摘Ecological civilization,which refers to the harmonious development of man and the nature,has the connotation of the ecological material civilization,ecological consciousness civilization,ecological institutional civilization and ecological behavior civilization.The research on ecological civilization evaluation index system is important in that it can provide the guidance for the construction of ecological civilization,and besides it can improve public recognition of the importance of ecological civilization to the level that they will personally contribute to the development of ecological civilization.The paper attempts to set up an evaluation index system for ecological civilization construction based on consulting to relevant documents,in a bid to provide some policy references for relevant departments.
