Jiang Yaoping, Vice Minister of MII (Ministry of Information Industry), has introduced six major preparations and measures of China information industry to meet challenges of China's entry into WTO at the c... Jiang Yaoping, Vice Minister of MII (Ministry of Information Industry), has introduced six major preparations and measures of China information industry to meet challenges of China's entry into WTO at the conference "Opportuuities and Challenges of the Information Industry" on 5th Anniversary of China's entry into WTO on 11th Dec, 2006, which are stated as follows:……展开更多
Platinum group metals have high melting points,strong corrosion resistance,stable chemical properties,and low oxygen permeability in high-temperature oxygen-containing environments.As thermal protective coating materi...Platinum group metals have high melting points,strong corrosion resistance,stable chemical properties,and low oxygen permeability in high-temperature oxygen-containing environments.As thermal protective coating materials,they have gained essential applications in the aerospace field and have excellent prospects for application in frontier military fields,such as protecting hot-end components of hypersonic aircraft.This research reviewed the latest research progress of platinum group metal coatings with hightemperature oxidation resistance,including coating preparation techniques,oxidation failure,and alloying modification.The leading preparation techniques of current platinum group metal coatings were discussed,as well as the advantages and disadvantages of various existing preparation techniques.Besides,the intrinsic properties,failure forms,and failure mechanisms of coatings of single platinum group metal in high-temperature oxygen-containing environments were analyzed.On this basis,the necessity,main methods,and main achievements of alloying modification of platinum group metals were summarized.Finally,the future development of platinum group coatings with high-temperature oxidation resistance was discussed and prospected.展开更多
国际实践指南注册与透明化平台(Practice guideline REgistration for transPAREncy,PREPARE)于2014年由中国学者联合国内外专家共同创建,由设立于兰州大学的世界卫生组织指南实施与知识转化合作中心负责管理和运营。作为全球首个指南...国际实践指南注册与透明化平台(Practice guideline REgistration for transPAREncy,PREPARE)于2014年由中国学者联合国内外专家共同创建,由设立于兰州大学的世界卫生组织指南实施与知识转化合作中心负责管理和运营。作为全球首个指南注册平台,PREPARE致力于提升临床实践指南和专家共识的科学性、透明度和应用价值,现阶段支持用户进行中英文双语注册,注册范围涵盖标准版指南、快速建议指南、患者版本指南、中医药指南、专家共识等多种类型。展开更多
国际实践指南注册与透明化平台(Practice guideline REgistration for transPAREncy,PREPARE)于2014年由中国学者联合国内外专家共同创建,由设立于兰州大学的世界卫生组织指南实施与知识转化合作中心负责管理和运营。作为全球首个指南...国际实践指南注册与透明化平台(Practice guideline REgistration for transPAREncy,PREPARE)于2014年由中国学者联合国内外专家共同创建,由设立于兰州大学的世界卫生组织指南实施与知识转化合作中心负责管理和运营。作为全球首个指南注册平台,PREPARE致力于提升临床实践指南和专家共识的科学性、透明度和应用价值,现阶段支持用户进行中英文双语注册,注册范围涵盖标准版指南、快速建议指南、患者版本指南、中医药指南、专家共识等多种类型。展开更多
Graphene/copper-based composite heat sinks demonstrate extensive application potential in military equipment thermal management,high-power electronic packaging,new energy vehicles,and 5G communication systems,due to t...Graphene/copper-based composite heat sinks demonstrate extensive application potential in military equipment thermal management,high-power electronic packaging,new energy vehicles,and 5G communication systems,due to their outstanding properties,including high thermal conductivity,tunable thermal expansion coefficients,excellent mechanical strength,and low density.However,the industrial-scale application of these composites faces critical challenges during the fabrication of components with complex structures,such as inhomogeneous dispersion of graphene within the copper matrix and poor interfacial bonding between the two phases,which substantially undermine the overall performance of graphene/copper-based composites.To address these issues,the preparation methods for graphene/copper-based composite heat sinks were reviewed.For each method,a rigorous analysis was presented to clarify its inherent advantages and unavoidable restrictions.Furthermore,the latest research progress in addressing three core scientific challenges was synthesized,including uniform dispersion of graphene,interfacial optimization mechanisms,and molecular dynamics simulations for elucidating the structure-property relationships.Finally,the future development directions of graphene/copper-based composite heat sinks in engineering applications were prospected.展开更多
This study systematically conducted preparation optimization and performance investigations on Co-modified Ce/TiO_(2) catalysts,with a focus on examining how preparation methods and Co loading regulate the catalyst’s...This study systematically conducted preparation optimization and performance investigations on Co-modified Ce/TiO_(2) catalysts,with a focus on examining how preparation methods and Co loading regulate the catalyst’s low-temperature denitrification activity.After identifying optimal preparation parameters via condition screening,multiple characterization techniques-including BET,XRD,XPS,H_(2)-TPR and in situ DRIFTS-were employed to deeply analyze the catalyst’s physicochemical properties and reaction mechanism.Results demonstrated that compared to the impregnation and co-precipitation methods,the Ce-Co_(0.025)/TiO_(2)-SG catalyst(prepared by the sol-gel method with a Co/Ti mass ratio of 0.025)exhibited significantly superior denitrification activity:NO conversion remained stably above 95%in the 225−350℃ temperature range,and it displayed high N_(2) selectivity.Characterization analysis revealed that abundant surface oxygen vacancies,a high proportion of Ce^(3+) species,and prominent acidic sites collectively contributed to enhancing its low-temperature denitrification performance.This work provides reference value for the development of highly efficient low-temperature denitrification catalysts.展开更多
Intelligent refractory materials represent a new generation of high-temperature functional materials that significantly enhance the service performance of traditional refractories in extreme environments through integ...Intelligent refractory materials represent a new generation of high-temperature functional materials that significantly enhance the service performance of traditional refractories in extreme environments through integrated sensing,response,and adaptive mechanisms.A comprehensive overview of intelligent refractory materials was provided,focusing on their classification,preparation techniques,and industrial applications.Firstly,the categories and design principles of intelligent refractory materials are introduced,including self-healing,self-regulating,and self-diagnosing types,which enhance durability and performance under extreme conditions.Subsequently,advanced preparation technologies are discussed,such as 3D printing for complex geometries,nanocomposite engineering for improved mechanical and thermal properties,gradient design for optimized thermal stress resistance and information technology including machine learning,health monitoring,digital twin.Finally,the industrial applications of these materials are highlighted,particularly in steel metallurgy,building materials industry,and energy.It aims to bridge the gap between research advancements and practical implementation,offering insights into future trends in intelligent refractory material development.展开更多
The paper was published in October 24,2025(D0I:10.11865/zs.2025404).The author wishes to correct her affiliation due to an institutional change during the manuscript preparation process.
Global water scarcity and pollution present critical challenges for human society.Solar-driven wastewater treatments,such as photocatalytic degradation of organic pollutants and photothermal conversion water evaporati...Global water scarcity and pollution present critical challenges for human society.Solar-driven wastewater treatments,such as photocatalytic degradation of organic pollutants and photothermal conversion water evaporation,offer promising solutions.TiO_(2)has garnered extensive attention in these fields,but its large bandgap limits light absorption,affecting its performance and broader applications in energy and environmental fields.Consequently,modifying TiO_(2)to improve its photocatalytic and photothermal conversion performance has become a research hotspot.Among various modification strategies,self-doping with Ti^(3+)and oxygen vacancies can reduce the bandgap of TiO_(2),improve sunlight utilization,and increase the separation efficiency of photogenerated electron-hole pairs,thereby significantly enhancing the photocatalytic and photothermal conversion performance.This review focuses on the inorganic chemical reduction methods for preparing Ti^(3+)/oxygen vacancies self-doped TiO_(2)and their current applications in solar-driven photothermal conversion water evaporation.It highlights the challenges faced during synthesis and application while offering insights into future development prospects.This review is expected to provide a valuable reference for further research on the preparation and application of Ti^(3+)/oxygen vacancies self-doped TiO_(2).展开更多
To address the zero-sample challenge in preparation parameter design for newly developed alloys,a novel machine learning strategy that integrates basic dataset construction with Bayesian optimization,was proposed.The ...To address the zero-sample challenge in preparation parameter design for newly developed alloys,a novel machine learning strategy that integrates basic dataset construction with Bayesian optimization,was proposed.The impact of basic sample dataset construction methods,optimization benchmarks and multi-objective utility functions on Bayesian optimization was investigated.It was found that the combination of orthogonal design,linear benchmark,and shifted multiplicative utility function exhibits the best optimization performance.The strategy was then applied to a new Cu-Ni-Co-Si alloy with ultra-low Co content(0.7 wt.%Co),previously designed by our research team.Rapid optimization of six preparation parameters in the two-stage deformation and aging process of the zero-sample alloy was achieved through only 23 experiments.The measured ultimate tensile strength and electrical conductivity of the new alloy were 878 MPa and 44.0%(IACS),respectively,reaching the comprehensive performance level of the Cu-Ni-Co-Si alloy(C70350 alloy)containing 1.0-2.0 wt.%Co.展开更多
To explore the best preparation process for terminal blend(TB)composite-modified asphalt and to filter its formulation with excellent performance,this study evaluates the performance of TB composite modified asphalt b...To explore the best preparation process for terminal blend(TB)composite-modified asphalt and to filter its formulation with excellent performance,this study evaluates the performance of TB composite modified asphalt by physical property index,microscopic morphology,rheological testing,and infrared spectroscopy on multiple scales.The results show that the best preparation process for TB-modified asphalt is stirring at 260℃ for 4 h at 400 rpm,which significantly reduces the modification time of the asphalt.From a physical property viewpoint,the TB composite-modified asphalt sample with 5% styrene-butadiene-styrene(SBS)+1% aromatics+0.1% sulfur exhibits high-comprehensive,high-and low-temperature properties.More-over,its crosslinked mesh structure comprises black rubber particles uniformly interwoven in the middle,which further enhances the performance of the asphalt and results in an excellent performance formulation.In addition,the sample with 5%SBS content has a higher G*value and smaller δ value than that with 3%SBS content,indicating that its high-temperature resistance is improved.The effect of adding 3%SBS content on the viscoelastic ratio is,to some extent,less than that caused by 20% rubber powder.展开更多
Objective:To systematically summarize and evaluate the evidence on discharge preparation services for patients undergoing total knee arthroplasty,providing an evidence-based foundation for developing scientific and st...Objective:To systematically summarize and evaluate the evidence on discharge preparation services for patients undergoing total knee arthroplasty,providing an evidence-based foundation for developing scientific and standardized discharge preparation intervention programs in clinical practice.Methods:Following the“5S”evidence model,literature such as guidelines,expert consensuses,evidence summaries and randomized controlled trials related to discharge preparation services for total knee arthroplasty patients were retrieved from relevant websites and databases,both domestic and international,from database inception to August 31,2025.Two researchers independently screened the literature,conducted quality appraisals,and extracted and synthesized the evidence.Results:A total of 15 articles were included,comprising 3 guidelines,4 expert consensuses,3 evidence summaries,3 systematic reviews and 2 randomized controlled trials.Ultimately,23 pieces of evidence were summarized across five aspects.Conclusion:This study synthesizes the evidence on discharge preparation services for patients undergoing total knee arthroplasty.It is recommended that healthcare professionals apply this evidence in clinical practice,considering specific circumstances and patient needs.展开更多
Titanium exhibits outstanding properties,particularly,high specific strength and resistance to both high and low temperatures,earning it a reputation as the metal of the future.However,because of the highly reactive n...Titanium exhibits outstanding properties,particularly,high specific strength and resistance to both high and low temperatures,earning it a reputation as the metal of the future.However,because of the highly reactive nature of titanium,metallic titanium production involves extensive procedures and high costs.Considering its advantages and limitations,the European Union has classified titanium metal as a critical raw material(CRM)of low category.The Kroll process is predominantly used to produce titanium;however,molten salt electrolysis(MSE)is currently being explored for producing metallic titanium at a low cost.Since 2000,electrolytic titanium production has undergone a wave of technological advancements.However,because of the intermediate and disproportionation reactions in the electrolytic titanium production process,the process efficiency and titanium purity according to industrial standards could not be achieved.Consequently,metallic titanium production has gradually diversified into employing technologies such as thermal reduction,MSE,and titanium alloy preparation.This study provides a comprehensive review of research advances in titanium metal preparation technologies over the past two decades,highlighting the challenges faced by the existing methods and proposing potential solutions.It offers useful insights into the development of low-cost titanium preparation technologies.展开更多
High-sulfur iron concentrates emit SO_(2)into the flue gas during pellet induration.To investigate the effect of the SO_(2)cycle on pellet quality in the grate-kiln process,sulfur balance analysis,thermodynamic calcul...High-sulfur iron concentrates emit SO_(2)into the flue gas during pellet induration.To investigate the effect of the SO_(2)cycle on pellet quality in the grate-kiln process,sulfur balance analysis,thermodynamic calculations,and pellet production experiments under simulated flue gas circulation conditions were conducted.The results indicated that SO_(2)circulation inhibited desulfurization and deteriorated pellet strength.SO_(2)absorption increased the pellet sulfur content to 0.70 wt.%during the downdraft drying phase,and the absorption could be aggravated by the moisture.The desulfurization rate of the preheating process was also decreased to 16.67%,resulting from the refractory sulfate generation.Sulfur content of the roasted pellets dropped to 0.13 wt.%because of the aluminosilicate generation.The finished pellet sulfur content further decreased to 0.08 wt.%due to the fresh air during the cooling process.Eventually,optimization measures were proposed when high-sulfur iron concentrates were used for oxidized pellet preparation.展开更多
Fiber-optic sensing technology has the advantages of passivity, anti-electromagnetic interference, longdistancemeasurement, high sensitivity and high accuracy, small size, and adaptability to harsh environments such a...Fiber-optic sensing technology has the advantages of passivity, anti-electromagnetic interference, longdistancemeasurement, high sensitivity and high accuracy, small size, and adaptability to harsh environments such ashigh-vacuum, high-pressure, and strong magnetic fields compared with the traditional electrical sensing technology.However, with the increasing application requirements, how to further improve the sensitivity of fiber-optic sensors,extend the detection limit and improve the maintenance-free capability has become one of the core issues of thecurrent research. This paper reviews the principle, preparation, and application of fiber-optic microstructured sensingbased on abrupt field type. It specifically outlines the development and applications of micro-nano optical fibers,photonic crystal optical fibers, optical fiber gratings and structured optical fibers, and lists the main preparationmethods of two types of micro-nano optical fibers from the basic theory of optical fiber microstructured sensordevices.展开更多
Hubei Province is making efforts to make school children in ethnic areas better understand their culture wang Sirui,8,is a grade-3 pupil at the Ethnic Primary School of Enshi Tujia and Miao Autonomous Prefecture (shor...Hubei Province is making efforts to make school children in ethnic areas better understand their culture wang Sirui,8,is a grade-3 pupil at the Ethnic Primary School of Enshi Tujia and Miao Autonomous Prefecture (shortened as Enshi Prefecture (shortened as Enshi Prefecture), central China’s Hubei Province. Although from the Tujia ethnic group, the little girl knew little about the Tujia culture before she came to study in the school in 2008.展开更多
Wang Shuhe,deputy director of State Administration of Coal Mine Safety(SACMS),remarked on December 12th that SACMS is preparing to promul-gate a standard for the
驾驶舱互联应用是指其通过技术手段,实现航班驾驶舱内部设备之间、设备数据与网络之间相互连通的应用。为普及驾驶舱互联应用在国内航班的运用,在地面搭建一个基于半实物仿真技术的平台是开展驾驶舱互联应用可行性验证的高效低成本方式...驾驶舱互联应用是指其通过技术手段,实现航班驾驶舱内部设备之间、设备数据与网络之间相互连通的应用。为普及驾驶舱互联应用在国内航班的运用,在地面搭建一个基于半实物仿真技术的平台是开展驾驶舱互联应用可行性验证的高效低成本方式。平台由仿真计算机、航空数据总线板卡和航电设备模块三部分组成,仿真计算机通过模拟飞行软件Prepar3D生成数据源,板卡将数据源转为ARINC 429等总线信号并驱动航电设备模块,航电设备模块由真实航电设备构成,可以仿真驾驶舱互联应用的过程。经测试,平台实现了在地面上对无线快速存取记录器参数网络传输、ACARS over IP等驾驶舱互联应用的仿真验证,提高了仿真的置信性。展开更多
文摘 Jiang Yaoping, Vice Minister of MII (Ministry of Information Industry), has introduced six major preparations and measures of China information industry to meet challenges of China's entry into WTO at the conference "Opportuuities and Challenges of the Information Industry" on 5th Anniversary of China's entry into WTO on 11th Dec, 2006, which are stated as follows:……
文摘Platinum group metals have high melting points,strong corrosion resistance,stable chemical properties,and low oxygen permeability in high-temperature oxygen-containing environments.As thermal protective coating materials,they have gained essential applications in the aerospace field and have excellent prospects for application in frontier military fields,such as protecting hot-end components of hypersonic aircraft.This research reviewed the latest research progress of platinum group metal coatings with hightemperature oxidation resistance,including coating preparation techniques,oxidation failure,and alloying modification.The leading preparation techniques of current platinum group metal coatings were discussed,as well as the advantages and disadvantages of various existing preparation techniques.Besides,the intrinsic properties,failure forms,and failure mechanisms of coatings of single platinum group metal in high-temperature oxygen-containing environments were analyzed.On this basis,the necessity,main methods,and main achievements of alloying modification of platinum group metals were summarized.Finally,the future development of platinum group coatings with high-temperature oxidation resistance was discussed and prospected.
文摘国际实践指南注册与透明化平台(Practice guideline REgistration for transPAREncy,PREPARE)于2014年由中国学者联合国内外专家共同创建,由设立于兰州大学的世界卫生组织指南实施与知识转化合作中心负责管理和运营。作为全球首个指南注册平台,PREPARE致力于提升临床实践指南和专家共识的科学性、透明度和应用价值,现阶段支持用户进行中英文双语注册,注册范围涵盖标准版指南、快速建议指南、患者版本指南、中医药指南、专家共识等多种类型。
文摘国际实践指南注册与透明化平台(Practice guideline REgistration for transPAREncy,PREPARE)于2014年由中国学者联合国内外专家共同创建,由设立于兰州大学的世界卫生组织指南实施与知识转化合作中心负责管理和运营。作为全球首个指南注册平台,PREPARE致力于提升临床实践指南和专家共识的科学性、透明度和应用价值,现阶段支持用户进行中英文双语注册,注册范围涵盖标准版指南、快速建议指南、患者版本指南、中医药指南、专家共识等多种类型。
基金Research Start-Up Fund Project of Anhui Polytechnic University(S022023017)University Research Project of Anhui Province(2023AH050937)+1 种基金Anhui Polytechnic University Research Foundation for Introducing Talents(2022YQQ003)Anhui Province Key Laboratory of Intelligent Vehicle Chassis by Wire。
文摘Graphene/copper-based composite heat sinks demonstrate extensive application potential in military equipment thermal management,high-power electronic packaging,new energy vehicles,and 5G communication systems,due to their outstanding properties,including high thermal conductivity,tunable thermal expansion coefficients,excellent mechanical strength,and low density.However,the industrial-scale application of these composites faces critical challenges during the fabrication of components with complex structures,such as inhomogeneous dispersion of graphene within the copper matrix and poor interfacial bonding between the two phases,which substantially undermine the overall performance of graphene/copper-based composites.To address these issues,the preparation methods for graphene/copper-based composite heat sinks were reviewed.For each method,a rigorous analysis was presented to clarify its inherent advantages and unavoidable restrictions.Furthermore,the latest research progress in addressing three core scientific challenges was synthesized,including uniform dispersion of graphene,interfacial optimization mechanisms,and molecular dynamics simulations for elucidating the structure-property relationships.Finally,the future development directions of graphene/copper-based composite heat sinks in engineering applications were prospected.
基金Supported by the National Key Research and Development Program of China (2023YFB4102903)。
文摘This study systematically conducted preparation optimization and performance investigations on Co-modified Ce/TiO_(2) catalysts,with a focus on examining how preparation methods and Co loading regulate the catalyst’s low-temperature denitrification activity.After identifying optimal preparation parameters via condition screening,multiple characterization techniques-including BET,XRD,XPS,H_(2)-TPR and in situ DRIFTS-were employed to deeply analyze the catalyst’s physicochemical properties and reaction mechanism.Results demonstrated that compared to the impregnation and co-precipitation methods,the Ce-Co_(0.025)/TiO_(2)-SG catalyst(prepared by the sol-gel method with a Co/Ti mass ratio of 0.025)exhibited significantly superior denitrification activity:NO conversion remained stably above 95%in the 225−350℃ temperature range,and it displayed high N_(2) selectivity.Characterization analysis revealed that abundant surface oxygen vacancies,a high proportion of Ce^(3+) species,and prominent acidic sites collectively contributed to enhancing its low-temperature denitrification performance.This work provides reference value for the development of highly efficient low-temperature denitrification catalysts.
基金supported by the Natural Science Foundation of Shaanxi Province(No.2023-JC-QN-0615)the National Natural Science Foundation of China(Nos.52272027 and 52372034).
文摘Intelligent refractory materials represent a new generation of high-temperature functional materials that significantly enhance the service performance of traditional refractories in extreme environments through integrated sensing,response,and adaptive mechanisms.A comprehensive overview of intelligent refractory materials was provided,focusing on their classification,preparation techniques,and industrial applications.Firstly,the categories and design principles of intelligent refractory materials are introduced,including self-healing,self-regulating,and self-diagnosing types,which enhance durability and performance under extreme conditions.Subsequently,advanced preparation technologies are discussed,such as 3D printing for complex geometries,nanocomposite engineering for improved mechanical and thermal properties,gradient design for optimized thermal stress resistance and information technology including machine learning,health monitoring,digital twin.Finally,the industrial applications of these materials are highlighted,particularly in steel metallurgy,building materials industry,and energy.It aims to bridge the gap between research advancements and practical implementation,offering insights into future trends in intelligent refractory material development.
文摘The paper was published in October 24,2025(D0I:10.11865/zs.2025404).The author wishes to correct her affiliation due to an institutional change during the manuscript preparation process.
基金support from the Research Foundation for Talented Scholars of Linyi University(Z6122010).
文摘Global water scarcity and pollution present critical challenges for human society.Solar-driven wastewater treatments,such as photocatalytic degradation of organic pollutants and photothermal conversion water evaporation,offer promising solutions.TiO_(2)has garnered extensive attention in these fields,but its large bandgap limits light absorption,affecting its performance and broader applications in energy and environmental fields.Consequently,modifying TiO_(2)to improve its photocatalytic and photothermal conversion performance has become a research hotspot.Among various modification strategies,self-doping with Ti^(3+)and oxygen vacancies can reduce the bandgap of TiO_(2),improve sunlight utilization,and increase the separation efficiency of photogenerated electron-hole pairs,thereby significantly enhancing the photocatalytic and photothermal conversion performance.This review focuses on the inorganic chemical reduction methods for preparing Ti^(3+)/oxygen vacancies self-doped TiO_(2)and their current applications in solar-driven photothermal conversion water evaporation.It highlights the challenges faced during synthesis and application while offering insights into future development prospects.This review is expected to provide a valuable reference for further research on the preparation and application of Ti^(3+)/oxygen vacancies self-doped TiO_(2).
基金supported by the National Natural Science Foundation of China(Nos.52404387,52090041,52374379,52425409)Xiaomi Young Scholars Program China,the National Postdoctoral Program for Innovative Talents,China(No.BX20230042)China Postdoctoral Science Foundation(No.2024M750174)。
文摘To address the zero-sample challenge in preparation parameter design for newly developed alloys,a novel machine learning strategy that integrates basic dataset construction with Bayesian optimization,was proposed.The impact of basic sample dataset construction methods,optimization benchmarks and multi-objective utility functions on Bayesian optimization was investigated.It was found that the combination of orthogonal design,linear benchmark,and shifted multiplicative utility function exhibits the best optimization performance.The strategy was then applied to a new Cu-Ni-Co-Si alloy with ultra-low Co content(0.7 wt.%Co),previously designed by our research team.Rapid optimization of six preparation parameters in the two-stage deformation and aging process of the zero-sample alloy was achieved through only 23 experiments.The measured ultimate tensile strength and electrical conductivity of the new alloy were 878 MPa and 44.0%(IACS),respectively,reaching the comprehensive performance level of the Cu-Ni-Co-Si alloy(C70350 alloy)containing 1.0-2.0 wt.%Co.
基金Funded by the National Natural Science Foundation of China(No.52278446)。
文摘To explore the best preparation process for terminal blend(TB)composite-modified asphalt and to filter its formulation with excellent performance,this study evaluates the performance of TB composite modified asphalt by physical property index,microscopic morphology,rheological testing,and infrared spectroscopy on multiple scales.The results show that the best preparation process for TB-modified asphalt is stirring at 260℃ for 4 h at 400 rpm,which significantly reduces the modification time of the asphalt.From a physical property viewpoint,the TB composite-modified asphalt sample with 5% styrene-butadiene-styrene(SBS)+1% aromatics+0.1% sulfur exhibits high-comprehensive,high-and low-temperature properties.More-over,its crosslinked mesh structure comprises black rubber particles uniformly interwoven in the middle,which further enhances the performance of the asphalt and results in an excellent performance formulation.In addition,the sample with 5%SBS content has a higher G*value and smaller δ value than that with 3%SBS content,indicating that its high-temperature resistance is improved.The effect of adding 3%SBS content on the viscoelastic ratio is,to some extent,less than that caused by 20% rubber powder.
文摘Objective:To systematically summarize and evaluate the evidence on discharge preparation services for patients undergoing total knee arthroplasty,providing an evidence-based foundation for developing scientific and standardized discharge preparation intervention programs in clinical practice.Methods:Following the“5S”evidence model,literature such as guidelines,expert consensuses,evidence summaries and randomized controlled trials related to discharge preparation services for total knee arthroplasty patients were retrieved from relevant websites and databases,both domestic and international,from database inception to August 31,2025.Two researchers independently screened the literature,conducted quality appraisals,and extracted and synthesized the evidence.Results:A total of 15 articles were included,comprising 3 guidelines,4 expert consensuses,3 evidence summaries,3 systematic reviews and 2 randomized controlled trials.Ultimately,23 pieces of evidence were summarized across five aspects.Conclusion:This study synthesizes the evidence on discharge preparation services for patients undergoing total knee arthroplasty.It is recommended that healthcare professionals apply this evidence in clinical practice,considering specific circumstances and patient needs.
基金financial support from the Yunnan Province Key Industries Science and Technology Special Project for Colleges and UniversitiesChina(No.FWCY-QYCT2024006)+6 种基金National Natural Science Foundation of China(Nos.52104351 and 52364051)Science and Technology Major Project of Yunnan Province,China(No.202202AG050007)the Yunnan Fundamental Research ProjectsChina(No.202401AT070314)the Key Technology Research and Development Program of Shandong Province,China(No.2023CXGC010903)Central Guidance Local Scientific and Technological Development Funds,China(No.202407AB110022)Yunnan Province Xingdian Talent Support Plan Project,China。
文摘Titanium exhibits outstanding properties,particularly,high specific strength and resistance to both high and low temperatures,earning it a reputation as the metal of the future.However,because of the highly reactive nature of titanium,metallic titanium production involves extensive procedures and high costs.Considering its advantages and limitations,the European Union has classified titanium metal as a critical raw material(CRM)of low category.The Kroll process is predominantly used to produce titanium;however,molten salt electrolysis(MSE)is currently being explored for producing metallic titanium at a low cost.Since 2000,electrolytic titanium production has undergone a wave of technological advancements.However,because of the intermediate and disproportionation reactions in the electrolytic titanium production process,the process efficiency and titanium purity according to industrial standards could not be achieved.Consequently,metallic titanium production has gradually diversified into employing technologies such as thermal reduction,MSE,and titanium alloy preparation.This study provides a comprehensive review of research advances in titanium metal preparation technologies over the past two decades,highlighting the challenges faced by the existing methods and proposing potential solutions.It offers useful insights into the development of low-cost titanium preparation technologies.
基金supported by the Science and Technology Innovation Program of Hunan Province(Nos.2023RC1025 and 2024RC3022)the Technology Special Program Project of China Minmetals Corporation(No.2021ZXA04)the Major Scientific Research Projects of Inner Mongolia Baotou Steel Union Co.,Ltd.(No.HKF202300356).
文摘High-sulfur iron concentrates emit SO_(2)into the flue gas during pellet induration.To investigate the effect of the SO_(2)cycle on pellet quality in the grate-kiln process,sulfur balance analysis,thermodynamic calculations,and pellet production experiments under simulated flue gas circulation conditions were conducted.The results indicated that SO_(2)circulation inhibited desulfurization and deteriorated pellet strength.SO_(2)absorption increased the pellet sulfur content to 0.70 wt.%during the downdraft drying phase,and the absorption could be aggravated by the moisture.The desulfurization rate of the preheating process was also decreased to 16.67%,resulting from the refractory sulfate generation.Sulfur content of the roasted pellets dropped to 0.13 wt.%because of the aluminosilicate generation.The finished pellet sulfur content further decreased to 0.08 wt.%due to the fresh air during the cooling process.Eventually,optimization measures were proposed when high-sulfur iron concentrates were used for oxidized pellet preparation.
基金support by National Natural Science Foundation of China (Nos. 51606158, 12104402)
文摘Fiber-optic sensing technology has the advantages of passivity, anti-electromagnetic interference, longdistancemeasurement, high sensitivity and high accuracy, small size, and adaptability to harsh environments such ashigh-vacuum, high-pressure, and strong magnetic fields compared with the traditional electrical sensing technology.However, with the increasing application requirements, how to further improve the sensitivity of fiber-optic sensors,extend the detection limit and improve the maintenance-free capability has become one of the core issues of thecurrent research. This paper reviews the principle, preparation, and application of fiber-optic microstructured sensingbased on abrupt field type. It specifically outlines the development and applications of micro-nano optical fibers,photonic crystal optical fibers, optical fiber gratings and structured optical fibers, and lists the main preparationmethods of two types of micro-nano optical fibers from the basic theory of optical fiber microstructured sensordevices.
文摘Hubei Province is making efforts to make school children in ethnic areas better understand their culture wang Sirui,8,is a grade-3 pupil at the Ethnic Primary School of Enshi Tujia and Miao Autonomous Prefecture (shortened as Enshi Prefecture (shortened as Enshi Prefecture), central China’s Hubei Province. Although from the Tujia ethnic group, the little girl knew little about the Tujia culture before she came to study in the school in 2008.
文摘Wang Shuhe,deputy director of State Administration of Coal Mine Safety(SACMS),remarked on December 12th that SACMS is preparing to promul-gate a standard for the
文摘驾驶舱互联应用是指其通过技术手段,实现航班驾驶舱内部设备之间、设备数据与网络之间相互连通的应用。为普及驾驶舱互联应用在国内航班的运用,在地面搭建一个基于半实物仿真技术的平台是开展驾驶舱互联应用可行性验证的高效低成本方式。平台由仿真计算机、航空数据总线板卡和航电设备模块三部分组成,仿真计算机通过模拟飞行软件Prepar3D生成数据源,板卡将数据源转为ARINC 429等总线信号并驱动航电设备模块,航电设备模块由真实航电设备构成,可以仿真驾驶舱互联应用的过程。经测试,平台实现了在地面上对无线快速存取记录器参数网络传输、ACARS over IP等驾驶舱互联应用的仿真验证,提高了仿真的置信性。
