This paper focus on the ratoon rice, which with the features of south Chi-na paddy cultivation technology. First, the development of the technology research on ratoon rice in southwest ecotope of China was briefly rev...This paper focus on the ratoon rice, which with the features of south Chi-na paddy cultivation technology. First, the development of the technology research on ratoon rice in southwest ecotope of China was briefly reviewed. Second, the key technical measures of the ratoon rice production were described in detail. At last, the application effect of the ratoon rice production technology was described accu-rately, which based on the production practice in recent years. The purpose of this article is promoting the research and extension of the ratoon rice technology more widely in world’s main rice-producing areas, especial y in the suitable area where the light and heat resources are rich.展开更多
This article mainly summarizes various aspects of hydrogen peroxide(H2O2)production through the anthraquinone route,including hydrogenation catalysts,working solution,regeneration technique,hydrogenation reactors,and ...This article mainly summarizes various aspects of hydrogen peroxide(H2O2)production through the anthraquinone route,including hydrogenation catalysts,working solution,regeneration technique,hydrogenation reactors,and environmental protection.The advances and breakthrough of SINOPEC in the production of H2O2 through the anthraquinone route is presented in this review,highlighting recent innovative technology on these aspects developed independently.The technical prospect and scientific challenges associated with the direct synthesis method from hydrogen and oxygen are also briefly discussed.展开更多
After two decades＇ endeavor, the Research Institute of Petroleum Processing （RIPP） has successfully de- veloped a green caprolactam （CPL） production technology. This technology is based on the integration of tita...After two decades＇ endeavor, the Research Institute of Petroleum Processing （RIPP） has successfully de- veloped a green caprolactam （CPL） production technology. This technology is based on the integration of titanium silicate （TS）-I zeolite with the slurry-bed reactor for the ammoximation of cyclohexanone, the integration of silicalite-1 zeolite with the moving-bed reactor for the gas-phase rearrangement of cyclohex- anone oxime, and the integration of an amorphous nickel （Ni） catalyst with the magnetically stabilized bed reactor for the purification of caprolactam. The world＇s first industrial plant based on this green CPL produc- tion technology has been built and possesses a capacity of 200 kt·a-1. Compared with existing technologies, the plant investment is pronouncedly reduced, and the nitrogen （N） atom utilization is drastically improved. The waste emission is reduced significantly; for example, no ammonium sulfate byproduct is produced. As a result, the price difference between CPL and benzene drops. In 2015, the capacity of the green CPL produc- tion technology reached 3 ×10-6 t·a-1, making China the world＇s largest CPL producer, with a global market share exceeding 50%.展开更多
Recent progress in the production and technology of ductile cast iron castings in China is reviewed. The manufacture and process control of as-cast ductile iron are discussed. The microstructure, properties and applic...Recent progress in the production and technology of ductile cast iron castings in China is reviewed. The manufacture and process control of as-cast ductile iron are discussed. The microstructure, properties and application of partial austenitization normalizing ductile iron and austempered ductile iron (ADI) are briefly depicted. The new development of ductile iron production techniques, such as cored-wire injection (wire-feeding nodularization) process, tundish cover ladle nodularizing process, horizontal continuous casting, and EPC process (lost foam) for ductile iron castings, etc., are summarized.展开更多
The demands for improved engine performance,fuel economy,durability,and lower emissions provide a continual challenge for engine designers.The use of Compacted Graphite Iron(CGI)has been established for successful hig...The demands for improved engine performance,fuel economy,durability,and lower emissions provide a continual challenge for engine designers.The use of Compacted Graphite Iron(CGI)has been established for successful high volume series production in the passenger vehicle,commercial vehicle and industrial power sectors over the last decade.The increased demand for CGI engine components provides new opportunities for the cast iron foundry industry to establish efficient and robust CGI volume production processes,in China and globally.The production window range for stable CGI is narrow and constantly moving.Therefore,any one step single addition of magnesium alloy and the inoculant cannot ensure a reliable and consistent production process for complicated CGI engine castings.The present paper introduces the SinterCast thermal analysis process control system that provides for the consistent production of CGI with low nodularity and reduced porosity,without risking the formation of flake graphite.The technology is currently being used in high volume Chinese foundry production.The Chinese foundry industry can develop complicated high demand CGI engine castings with the proper process control technology.展开更多
The product system of high strength low alloy steels (HSLA) produced by Wuhan Iron and Steel (Group) Corporation (WISCO) was presented.A series of high performance structural steels have been developed for important c...The product system of high strength low alloy steels (HSLA) produced by Wuhan Iron and Steel (Group) Corporation (WISCO) was presented.A series of high performance structural steels have been developed for important construction projects around the world in different areas,such as bridge,pressure vessel,pipe line,shipbuilding,architecture,machinery and railway wagons.In order to promote the development of large heat input welding steel,high grade thick pipeline steel and long span bridge steel,a lot of advanced production technologies have been achieved through intensive investigation,such as the control of high purity,high homogenization and free defects in steel slabs,the rules of high melting point particle formation and distribution in micro and nano scale during steel production,and the TMCP technology for ultra low carbon bainite steel for medium and heavy plates.WISCO will carry on research and application of economic and weather-resistant steels and promote the developing and producing technologies of HSLA steel.展开更多
According to the objective reality in Yunnan Province,such as great difference of weather,a great proportion of minorities,technological backwardness of agricultural production,low conversion rate of research accompli...According to the objective reality in Yunnan Province,such as great difference of weather,a great proportion of minorities,technological backwardness of agricultural production,low conversion rate of research accomplishments,and a limited number of agricultural technical personnel,ASP.NET technique and SQL Server 2005 database technique are adopted.Database platform of county agricultural production technology in Yunnan Province is established by using B/S structure.This platform includes presentation layer,application layer,and data layer,involving regional information,technology column information,technology classification information,technology content and other databases.It has six functional modules,namely information browse,system management,regional maintenance,technical section maintenance,category maintenance and technical information release,integrating crop cultivation,livestock breeding,economic forest management,plant protection,agricultural products processing,agricultural machinery use and other agricultural technical information.This platform can exchange information dynamically with the client,perform the query request from users,and send the result to users.This database platform has friendly interface,profuse information,high pertinency and so on,which offers rich and reliable information resources to farmers,agricultural technical personnel,and government.At present,this platform has been popularized in some areas of Yunnan Province and has obtained good results.展开更多
This paper standardizes the operation of rapeseed production including variety choosing,field preparation,mechanical seeding,field management,mechanical harvesting etc.,to realize full mechanization of rapeseed produc...This paper standardizes the operation of rapeseed production including variety choosing,field preparation,mechanical seeding,field management,mechanical harvesting etc.,to realize full mechanization of rapeseed production. The key technologies: the optimum sowing date was from mid-September to mid-October in rapeseed-rice（corn） double cropping system region,and from mid-October to late October in rapeseed-rice-rice triple-cropping region; seeding rate was 4. 5 kg/ha-6. 0 kg/ha; the optimum density was 450000-750000 plants per ha;150-240 kg N fertilizer,60-90 kg P2O5 fertilizer,90-135 kg K2O fertilizer and 7. 5-15 kg B fertilizer were used per ha,50% of N fertilizer and the rest of fertilizer were used as basal fertilizer; segmented harvesting was done when 70%-80% of siliques per plant was yellow and combined harvesting was done when more than 90% of siliques per plant was yellow or brown.展开更多
Bahu lotus root is a specialty of Hedong District,Linyi City,Shandong Province.It was recognized as a national product of geographical indication in 2011.This article describes the specific production area,unique prod...Bahu lotus root is a specialty of Hedong District,Linyi City,Shandong Province.It was recognized as a national product of geographical indication in 2011.This article describes the specific production area,unique production environment,rich cultural history and unique quality of Bahu lotus root,and summarizes its unique production from four aspects:selection of origin,selection of variety,production management and timely harvest,aiming to maintain the brand of Bahu lotus root to the greatest extent and further enhance the brand value and influence.展开更多
This study was conducted to investigate the in-vitro production technology of embryos from young Dorper sheep, so as to provide technical support for the utilization of ovarian follicles in young Dorper sheep. Tests w...This study was conducted to investigate the in-vitro production technology of embryos from young Dorper sheep, so as to provide technical support for the utilization of ovarian follicles in young Dorper sheep. Tests were conducted from the induction of Dorper sheep of 4 to 8 weeks old using follicle stimulating hormone(FSH) and pregnant horse serum(PMSG), collection of oocytes, in-vitro oocyte maturation-fertilization-zygote cultivation and 2-4-cell-stage fertilized ovum transfer. The results showed that 585 oocytes were collected from eight Dorper sheep at the age of 4 and 8 weeks, with an average of 73.13 oocytes/sheep. 346 of the 2-4-cell-stage fertilized eggs were obtained, whose cleavage rate was 59.15%. 77 in-vitro fertilized eggs at 2-4-cell stage were transplanted into 17 recipient sheep, seven of which were pregnant and gave birth to 13 "test-tube sheep" with a conception rate of 41.18%. It is indicated that the hormone induction technique, in-vitro oocyte maturation-fertilization-zygote cultivation technique and 2-4-cell-stage fertilized ovum transfer technique used in this study can serve as effective techniques for the in-vitro production of embryos from Dorper sheep of 4-8 weeks old.展开更多
With the adjustment of the tropical and subtropical fruit industry organizations in southern China, the Hylocereus undatus(pitaya) industry is growing rapidly in subtropical Guangxi and other places. Guangxi is also t...With the adjustment of the tropical and subtropical fruit industry organizations in southern China, the Hylocereus undatus(pitaya) industry is growing rapidly in subtropical Guangxi and other places. Guangxi is also the largest natural selenium-rich region in the country, and selenium-enriched pitaya is increasingly sought after by the general public. This paper described in detail the selection of selenium-enriched pitaya production fields, key planting techniques and core selenium enrichment techniques, with a view to providing technical guidance for the standardized production of selenium-enriched pitaya and providing technical support for improving the quality and efficiency of pitaya production in natural selenium-rich areas.展开更多
This paper elaborated the quality characteristics,nutritional value and specific production area of Linshu sweet potato.Besides,it summarized the pollution-free production technology of Linshu sweet potato from the as...This paper elaborated the quality characteristics,nutritional value and specific production area of Linshu sweet potato.Besides,it summarized the pollution-free production technology of Linshu sweet potato from the aspects of origin selection,variety selection,production management,harvest and storage,so as to guide the normalization and standardization of production technology,improve production and quality,and further enhance the brand awareness of Linshu sweet potato in both the national and international markets.展开更多
The application of mechanical and chemical syntheses in an high-energy vibration mill of the FESTU makes easy the process of the introduction of reinforced powders in castle composite materials on the Al basis. The ob...The application of mechanical and chemical syntheses in an high-energy vibration mill of the FESTU makes easy the process of the introduction of reinforced powders in castle composite materials on the Al basis. The obtained reinforced phases of Al-Ti-C composition have high specific Surface due to peculiarities of explosive mechanical and chemical syntheses. It increases the uniformity of their distribution in a matrix melt during the mixing process and also increases properties of castle composite materials.展开更多
The appearance of lean production technology has greatly changed the tradition of manual production mode and mass production mode. It starts from product planning, extends to customers through the whole manufacturing ...The appearance of lean production technology has greatly changed the tradition of manual production mode and mass production mode. It starts from product planning, extends to customers through the whole manufacturing process and coordination of supplier systems, and becomes the most standard global production system in the 20th century-lean production mode. With the overall promotion of EPC general contracting mode in our country, the lean construction extending from lean production mode to construction industry will surely usher in great application and development space. It will completely change the traditional engineering implementation technology and mode, and thus create a new engineering project management mode with the goal of "win-win, integrated delivery".展开更多
Polyurethane elastic fiber is a fiber made of polyurethane, which is found in actual textile production. By using high particle size pigment carbon black and hyperdispersant, selecting scientific control conditions an...Polyurethane elastic fiber is a fiber made of polyurethane, which is found in actual textile production. By using high particle size pigment carbon black and hyperdispersant, selecting scientific control conditions and appropriate amount of carbon black, the black stock solution meeting the requirements of dry spandex spinning can be produced by using stock solution coloring method. Effectively promote the industrial production of black spandex on the existing production line. Based on this, this paper explores the research process, production process and key technical points of dry spinning black spandex production technology.展开更多
With the continuous development of China's social economy, the demand for natural resources is also increasing day by day. As an important guarantee energy for China's economic development, China's petroch...With the continuous development of China's social economy, the demand for natural resources is also increasing day by day. As an important guarantee energy for China's economic development, China's petrochemical industry is also developing with the progress of society. Today, China's petrochemical industry has gradually stepped into the forefront of the world. As a non renewable resource, oil is an important resource formed by the geological process of the earth for thousands of years. Nowadays, the increasing demand for oil resources in the international community has led to the depletion of oil resources, and the oil exploitation project has gradually become difficult and complex. Therefore, in today's social environment of shortage of oil resources, it is necessary to strengthen the optimization and innovation of oil production technology and comprehensively improve the oilfield production efficiency, so as to ensure the stable development of China's social economy and meet the production needs of various social industries. This paper will comb and analyze the oil production technology of burning oil reservoir.展开更多
Hybrid seed production technology(SPT)using genic recessive male sterility is of great importance in maize breeding.Here,we report a novel SPT based on a maize unilateral cross-incompatibility gene Zm Ga1F with an ext...Hybrid seed production technology(SPT)using genic recessive male sterility is of great importance in maize breeding.Here,we report a novel SPT based on a maize unilateral cross-incompatibility gene Zm Ga1F with an extremely low transgene transmission rate(TTR).Proper pollen-specific Zm Ga1F expression severely inhibits pollen tube growth leading to no fertilization.The maintainer line harbors a transgene cassette in an ipe1 male sterile background containing IPE1 to restore ipe1 male fertility,Zm Ga1F to prevent transgenic pollen escape,the red fluorescence protein encoding gene Ds Red2 for the separation of male sterile and fertile seeds,and the herbicide-resistant gene Bar for transgenic plant selection.When the maintainer line is selfed,gametes of ipe1/transgene and ipe1/-genotypes are produced,and pollen of the ipe1/transgene genotype is not able to fertilize female gametes due to pollen tube growth inhibition by Zm Ga1F.Subsequently,seeds of ipe1/ipe1 and ipe1/transgene genotypes are produced at a 1:1 ratio and could be separated easily by fluorescence-based seed sorting.Not a single seed emitting fluorescence is detected in more than 200,000 seeds examined demonstrating that the pollen-tube-inhibition(PTI)-based TTR is lower than what has been reported for similar technologies to date.This PTI-based SPT shows promising potential for future maize hybrid seed production.展开更多
Blue-coke is a kind of char obtained by the low temperature pyrolysis of non-caking or weakly-caking coal with high volatile matter.It is generally granular with high reactivity,high electrical resistivity and high in...Blue-coke is a kind of char obtained by the low temperature pyrolysis of non-caking or weakly-caking coal with high volatile matter.It is generally granular with high reactivity,high electrical resistivity and high in fixed carbon but low in ash,sulfur,aluminum and phosphorus content.It has low price and extensive application decided by the raw coal and the production technology.This paper reviews pyrolysis reactor,process principle,technology characteristic and application state of blue-coke production technology in China.It includes vertical oven technology,rotary kiln technology and rotary-hearth furnace technology with external-heating,and vertical oven technology,rotary-disc furnace technology and conveyor-belt furnace technology with internal-heating.According to the existing problems in industrial blue-coke production technology,perspectives in terms of dust removal from volatiles,coke quenching and breakthrough of pyrolysis technology are given.展开更多
基金Supported by Chinese Agriculture Special Scientific Research(200903002)The SpecialFunds for Major Chongqing Science and Technology Projects(cstc2012ggB8005)The Special Funds for Chongqing Agriculture Scientific Research and Extention~~
文摘This paper focus on the ratoon rice, which with the features of south Chi-na paddy cultivation technology. First, the development of the technology research on ratoon rice in southwest ecotope of China was briefly reviewed. Second, the key technical measures of the ratoon rice production were described in detail. At last, the application effect of the ratoon rice production technology was described accu-rately, which based on the production practice in recent years. The purpose of this article is promoting the research and extension of the ratoon rice technology more widely in world’s main rice-producing areas, especial y in the suitable area where the light and heat resources are rich.
文摘This article mainly summarizes various aspects of hydrogen peroxide(H2O2)production through the anthraquinone route,including hydrogenation catalysts,working solution,regeneration technique,hydrogenation reactors,and environmental protection.The advances and breakthrough of SINOPEC in the production of H2O2 through the anthraquinone route is presented in this review,highlighting recent innovative technology on these aspects developed independently.The technical prospect and scientific challenges associated with the direct synthesis method from hydrogen and oxygen are also briefly discussed.
文摘After two decades＇ endeavor, the Research Institute of Petroleum Processing （RIPP） has successfully de- veloped a green caprolactam （CPL） production technology. This technology is based on the integration of titanium silicate （TS）-I zeolite with the slurry-bed reactor for the ammoximation of cyclohexanone, the integration of silicalite-1 zeolite with the moving-bed reactor for the gas-phase rearrangement of cyclohex- anone oxime, and the integration of an amorphous nickel （Ni） catalyst with the magnetically stabilized bed reactor for the purification of caprolactam. The world＇s first industrial plant based on this green CPL produc- tion technology has been built and possesses a capacity of 200 kt·a-1. Compared with existing technologies, the plant investment is pronouncedly reduced, and the nitrogen （N） atom utilization is drastically improved. The waste emission is reduced significantly; for example, no ammonium sulfate byproduct is produced. As a result, the price difference between CPL and benzene drops. In 2015, the capacity of the green CPL produc- tion technology reached 3 ×10-6 t·a-1, making China the world＇s largest CPL producer, with a global market share exceeding 50%.
文摘Recent progress in the production and technology of ductile cast iron castings in China is reviewed. The manufacture and process control of as-cast ductile iron are discussed. The microstructure, properties and application of partial austenitization normalizing ductile iron and austempered ductile iron (ADI) are briefly depicted. The new development of ductile iron production techniques, such as cored-wire injection (wire-feeding nodularization) process, tundish cover ladle nodularizing process, horizontal continuous casting, and EPC process (lost foam) for ductile iron castings, etc., are summarized.
文摘The demands for improved engine performance,fuel economy,durability,and lower emissions provide a continual challenge for engine designers.The use of Compacted Graphite Iron(CGI)has been established for successful high volume series production in the passenger vehicle,commercial vehicle and industrial power sectors over the last decade.The increased demand for CGI engine components provides new opportunities for the cast iron foundry industry to establish efficient and robust CGI volume production processes,in China and globally.The production window range for stable CGI is narrow and constantly moving.Therefore,any one step single addition of magnesium alloy and the inoculant cannot ensure a reliable and consistent production process for complicated CGI engine castings.The present paper introduces the SinterCast thermal analysis process control system that provides for the consistent production of CGI with low nodularity and reduced porosity,without risking the formation of flake graphite.The technology is currently being used in high volume Chinese foundry production.The Chinese foundry industry can develop complicated high demand CGI engine castings with the proper process control technology.
文摘The product system of high strength low alloy steels (HSLA) produced by Wuhan Iron and Steel (Group) Corporation (WISCO) was presented.A series of high performance structural steels have been developed for important construction projects around the world in different areas,such as bridge,pressure vessel,pipe line,shipbuilding,architecture,machinery and railway wagons.In order to promote the development of large heat input welding steel,high grade thick pipeline steel and long span bridge steel,a lot of advanced production technologies have been achieved through intensive investigation,such as the control of high purity,high homogenization and free defects in steel slabs,the rules of high melting point particle formation and distribution in micro and nano scale during steel production,and the TMCP technology for ultra low carbon bainite steel for medium and heavy plates.WISCO will carry on research and application of economic and weather-resistant steels and promote the developing and producing technologies of HSLA steel.
基金Supported by the National Science & Technology Pillar Program during the Eleventh Five-Year Plan Period(2006BAD10A14)
文摘According to the objective reality in Yunnan Province,such as great difference of weather,a great proportion of minorities,technological backwardness of agricultural production,low conversion rate of research accomplishments,and a limited number of agricultural technical personnel,ASP.NET technique and SQL Server 2005 database technique are adopted.Database platform of county agricultural production technology in Yunnan Province is established by using B/S structure.This platform includes presentation layer,application layer,and data layer,involving regional information,technology column information,technology classification information,technology content and other databases.It has six functional modules,namely information browse,system management,regional maintenance,technical section maintenance,category maintenance and technical information release,integrating crop cultivation,livestock breeding,economic forest management,plant protection,agricultural products processing,agricultural machinery use and other agricultural technical information.This platform can exchange information dynamically with the client,perform the query request from users,and send the result to users.This database platform has friendly interface,profuse information,high pertinency and so on,which offers rich and reliable information resources to farmers,agricultural technical personnel,and government.At present,this platform has been popularized in some areas of Yunnan Province and has obtained good results.
文摘This paper standardizes the operation of rapeseed production including variety choosing,field preparation,mechanical seeding,field management,mechanical harvesting etc.,to realize full mechanization of rapeseed production. The key technologies: the optimum sowing date was from mid-September to mid-October in rapeseed-rice（corn） double cropping system region,and from mid-October to late October in rapeseed-rice-rice triple-cropping region; seeding rate was 4. 5 kg/ha-6. 0 kg/ha; the optimum density was 450000-750000 plants per ha;150-240 kg N fertilizer,60-90 kg P2O5 fertilizer,90-135 kg K2O fertilizer and 7. 5-15 kg B fertilizer were used per ha,50% of N fertilizer and the rest of fertilizer were used as basal fertilizer; segmented harvesting was done when 70%-80% of siliques per plant was yellow and combined harvesting was done when more than 90% of siliques per plant was yellow or brown.
基金Supported by Subsidy Project for Reform and Construction of Grassroots Agricultural Technology Extension System(Lu Nong Cai Zi[2017]77).
文摘Bahu lotus root is a specialty of Hedong District,Linyi City,Shandong Province.It was recognized as a national product of geographical indication in 2011.This article describes the specific production area,unique production environment,rich cultural history and unique quality of Bahu lotus root,and summarizes its unique production from four aspects:selection of origin,selection of variety,production management and timely harvest,aiming to maintain the brand of Bahu lotus root to the greatest extent and further enhance the brand value and influence.
基金Supported by Earmarked Fund for Construction of National Wool Sheep Industry Technology Research System(CARS-39-24)Program for Science and Technology Development of Shanxi Province(20120311024-1)+1 种基金Fund for Science and Technology Innovation Team in Shanxi Province(201705D131028-20)Shanxi Agricultural Industry Development Technology Leading Fund(2017CYYL-08)
文摘This study was conducted to investigate the in-vitro production technology of embryos from young Dorper sheep, so as to provide technical support for the utilization of ovarian follicles in young Dorper sheep. Tests were conducted from the induction of Dorper sheep of 4 to 8 weeks old using follicle stimulating hormone(FSH) and pregnant horse serum(PMSG), collection of oocytes, in-vitro oocyte maturation-fertilization-zygote cultivation and 2-4-cell-stage fertilized ovum transfer. The results showed that 585 oocytes were collected from eight Dorper sheep at the age of 4 and 8 weeks, with an average of 73.13 oocytes/sheep. 346 of the 2-4-cell-stage fertilized eggs were obtained, whose cleavage rate was 59.15%. 77 in-vitro fertilized eggs at 2-4-cell stage were transplanted into 17 recipient sheep, seven of which were pregnant and gave birth to 13 "test-tube sheep" with a conception rate of 41.18%. It is indicated that the hormone induction technique, in-vitro oocyte maturation-fertilization-zygote cultivation technique and 2-4-cell-stage fertilized ovum transfer technique used in this study can serve as effective techniques for the in-vitro production of embryos from Dorper sheep of 4-8 weeks old.
基金Supported by Guangxi Innovation-driven Development Science and Technology Major Project(GK AA17202026,GK AA17202037)Scientific Research and Technology Development Program of Nanning City(20182100)+2 种基金Guangxi Key Research and Development Program(GK AB16380164)Guangxi Selenium-enriched Crop Experiment Station(GTS2016011)Fundamental Scientific Research Fund of Guangxi Academy of Agricultural Sciences(GNK 2017YZ03)
文摘With the adjustment of the tropical and subtropical fruit industry organizations in southern China, the Hylocereus undatus(pitaya) industry is growing rapidly in subtropical Guangxi and other places. Guangxi is also the largest natural selenium-rich region in the country, and selenium-enriched pitaya is increasingly sought after by the general public. This paper described in detail the selection of selenium-enriched pitaya production fields, key planting techniques and core selenium enrichment techniques, with a view to providing technical guidance for the standardized production of selenium-enriched pitaya and providing technical support for improving the quality and efficiency of pitaya production in natural selenium-rich areas.
文摘This paper elaborated the quality characteristics,nutritional value and specific production area of Linshu sweet potato.Besides,it summarized the pollution-free production technology of Linshu sweet potato from the aspects of origin selection,variety selection,production management,harvest and storage,so as to guide the normalization and standardization of production technology,improve production and quality,and further enhance the brand awareness of Linshu sweet potato in both the national and international markets.
文摘The application of mechanical and chemical syntheses in an high-energy vibration mill of the FESTU makes easy the process of the introduction of reinforced powders in castle composite materials on the Al basis. The obtained reinforced phases of Al-Ti-C composition have high specific Surface due to peculiarities of explosive mechanical and chemical syntheses. It increases the uniformity of their distribution in a matrix melt during the mixing process and also increases properties of castle composite materials.
文摘The appearance of lean production technology has greatly changed the tradition of manual production mode and mass production mode. It starts from product planning, extends to customers through the whole manufacturing process and coordination of supplier systems, and becomes the most standard global production system in the 20th century-lean production mode. With the overall promotion of EPC general contracting mode in our country, the lean construction extending from lean production mode to construction industry will surely usher in great application and development space. It will completely change the traditional engineering implementation technology and mode, and thus create a new engineering project management mode with the goal of "win-win, integrated delivery".
文摘Polyurethane elastic fiber is a fiber made of polyurethane, which is found in actual textile production. By using high particle size pigment carbon black and hyperdispersant, selecting scientific control conditions and appropriate amount of carbon black, the black stock solution meeting the requirements of dry spandex spinning can be produced by using stock solution coloring method. Effectively promote the industrial production of black spandex on the existing production line. Based on this, this paper explores the research process, production process and key technical points of dry spinning black spandex production technology.
文摘With the continuous development of China's social economy, the demand for natural resources is also increasing day by day. As an important guarantee energy for China's economic development, China's petrochemical industry is also developing with the progress of society. Today, China's petrochemical industry has gradually stepped into the forefront of the world. As a non renewable resource, oil is an important resource formed by the geological process of the earth for thousands of years. Nowadays, the increasing demand for oil resources in the international community has led to the depletion of oil resources, and the oil exploitation project has gradually become difficult and complex. Therefore, in today's social environment of shortage of oil resources, it is necessary to strengthen the optimization and innovation of oil production technology and comprehensively improve the oilfield production efficiency, so as to ensure the stable development of China's social economy and meet the production needs of various social industries. This paper will comb and analyze the oil production technology of burning oil reservoir.
基金supported by the National Natural Science Foundation of China(32101725,32172058)。
文摘Hybrid seed production technology(SPT)using genic recessive male sterility is of great importance in maize breeding.Here,we report a novel SPT based on a maize unilateral cross-incompatibility gene Zm Ga1F with an extremely low transgene transmission rate(TTR).Proper pollen-specific Zm Ga1F expression severely inhibits pollen tube growth leading to no fertilization.The maintainer line harbors a transgene cassette in an ipe1 male sterile background containing IPE1 to restore ipe1 male fertility,Zm Ga1F to prevent transgenic pollen escape,the red fluorescence protein encoding gene Ds Red2 for the separation of male sterile and fertile seeds,and the herbicide-resistant gene Bar for transgenic plant selection.When the maintainer line is selfed,gametes of ipe1/transgene and ipe1/-genotypes are produced,and pollen of the ipe1/transgene genotype is not able to fertilize female gametes due to pollen tube growth inhibition by Zm Ga1F.Subsequently,seeds of ipe1/ipe1 and ipe1/transgene genotypes are produced at a 1:1 ratio and could be separated easily by fluorescence-based seed sorting.Not a single seed emitting fluorescence is detected in more than 200,000 seeds examined demonstrating that the pollen-tube-inhibition(PTI)-based TTR is lower than what has been reported for similar technologies to date.This PTI-based SPT shows promising potential for future maize hybrid seed production.
文摘Blue-coke is a kind of char obtained by the low temperature pyrolysis of non-caking or weakly-caking coal with high volatile matter.It is generally granular with high reactivity,high electrical resistivity and high in fixed carbon but low in ash,sulfur,aluminum and phosphorus content.It has low price and extensive application decided by the raw coal and the production technology.This paper reviews pyrolysis reactor,process principle,technology characteristic and application state of blue-coke production technology in China.It includes vertical oven technology,rotary kiln technology and rotary-hearth furnace technology with external-heating,and vertical oven technology,rotary-disc furnace technology and conveyor-belt furnace technology with internal-heating.According to the existing problems in industrial blue-coke production technology,perspectives in terms of dust removal from volatiles,coke quenching and breakthrough of pyrolysis technology are given.
