Considering current space debris situation in outer space environment,different methods for debris removal missions are proposed.In addition,advanced technologies are needed to be demonstrated for future human space e...Considering current space debris situation in outer space environment,different methods for debris removal missions are proposed.In addition,advanced technologies are needed to be demonstrated for future human space exploration programs.The main issue regarding to these missions is high mission cost for both debris removal missions and space environmental tests to achieve high maturity level for new space-usable technologies.Since,these missions are unavoidable for future of human space activities,a solution which can tackle these challenges is necessary.This paper will address to an idea which has the possibility to give a solution for facilitating technology readiness level(TRL)maturity tests by debris removal mission platform consideration.展开更多
Two problems were found in recent applications of TRLs in aerospace projects.One is how to accurately evaluate the readiness level of a given technology in a project using the TRL scale.The other is how to deal with t...Two problems were found in recent applications of TRLs in aerospace projects.One is how to accurately evaluate the readiness level of a given technology in a project using the TRL scale.The other is how to deal with the diversity(different types) of technologies involved in an aerospace project.To solve these problems,a technology readiness assessment(TRA) method based on three maturity characteristics is established,and this method is adapted according to the features of different types of technologies.The proposed method has been successfully applied to aerospace projects and enables great effectiveness and accuracy in assessing new technologies.展开更多
Contemporary system maturity assessment approaches have failed to provide robust quantitative system evaluations resulting in increased program costs and developmental risks.Standard assessment metrics,such as Technol...Contemporary system maturity assessment approaches have failed to provide robust quantitative system evaluations resulting in increased program costs and developmental risks.Standard assessment metrics,such as Technology Readiness Levels（TRL）,do not sufficiently evaluate increasingly complex systems.The System Readiness Level（SRL）is a newly developed system development metric that is a mathematical function of TRL and Integration Readiness Level（IRL） values for the components and connections of a particular system.SRL acceptance has been hindered because of concerns over SRL mathematical operations that may lead to inaccurate system readiness assessments.These inaccurate system readiness assessments are called readiness reversals.A new SRL calculation method using incidence matrices is proposed to alleviate these mathematical concerns.The presence of SRL readiness reversal is modeled for four SRL calculation methods across several system configurations.Logistic regression analysis demonstrates that the proposed Incidence Matrix SRL（IMSRL）method has a decreased presence of readiness reversal than other approaches suggested in the literature.Viable SRL methods will foster greater SRL adoption by systems engineering professionals and will support system development risk reduction goals.展开更多
The construction industry is a major contributor to environmental pollution.The effect of the construction industry on the environment may be mitigated using eco-friendly construction materials,such as biocomposites.O...The construction industry is a major contributor to environmental pollution.The effect of the construction industry on the environment may be mitigated using eco-friendly construction materials,such as biocomposites.Once developed,biocomposites may offer a viable alternative to the current materials in use.However,biocomposites are lagging in terms of adoption and eventual use in the construction industry.This article provides insights into the steps for biocomposites to become a product that is ready to use by the construction industry in a structural role.The development and the adoption of such a material is tackled with the use of two concepts,i.e.,technology readiness level and roadmapping,and explored in a case study on the“liquid wood”.Furthermore,interviews in the construction industry are carried out to identify the industry’s take on biocomposites.A customized roadmap,which underlines a mostly nontechnical perspective concerning this material,has emerged.Additionally,the adoption and diffusion issues that the“liquid wood”may encounter are outlined and complemented with further recommendations.展开更多
The world is rapidly adopting renewable energy alternatives at a remarkable rate to address the ever-increasing environmental crisis of CO_(2) emissions.Renewable energy system offers enormous potential to decarbonize...The world is rapidly adopting renewable energy alternatives at a remarkable rate to address the ever-increasing environmental crisis of CO_(2) emissions.Renewable energy system offers enormous potential to decarbonize the environment because they produce no greenhouse gases or other polluting emissions.However,the RES relies on natural resources for energy generation,such as sunlight,wind,water,geothermal,which are generally un-predictable and reliant on weather,season,and year.To account for these intermittencies,renewable energy can be stored using various techniques and then used in a consistent and controlled manner as needed.Several researchers from around the world have made substantial contributions over the last century to developing novel methods of energy storage that are efficient enough to meet increasing energy demand and technological break-throughs.This review attempts to provide a critical review of the advancements in the energy storage system from 1850-2022,including its evolution,classification,operating principles and comparison.展开更多
基金Supported by the National Natural Science Foundation of China(11572037)
文摘Considering current space debris situation in outer space environment,different methods for debris removal missions are proposed.In addition,advanced technologies are needed to be demonstrated for future human space exploration programs.The main issue regarding to these missions is high mission cost for both debris removal missions and space environmental tests to achieve high maturity level for new space-usable technologies.Since,these missions are unavoidable for future of human space activities,a solution which can tackle these challenges is necessary.This paper will address to an idea which has the possibility to give a solution for facilitating technology readiness level(TRL)maturity tests by debris removal mission platform consideration.
文摘Two problems were found in recent applications of TRLs in aerospace projects.One is how to accurately evaluate the readiness level of a given technology in a project using the TRL scale.The other is how to deal with the diversity(different types) of technologies involved in an aerospace project.To solve these problems,a technology readiness assessment(TRA) method based on three maturity characteristics is established,and this method is adapted according to the features of different types of technologies.The proposed method has been successfully applied to aerospace projects and enables great effectiveness and accuracy in assessing new technologies.
文摘Contemporary system maturity assessment approaches have failed to provide robust quantitative system evaluations resulting in increased program costs and developmental risks.Standard assessment metrics,such as Technology Readiness Levels（TRL）,do not sufficiently evaluate increasingly complex systems.The System Readiness Level（SRL）is a newly developed system development metric that is a mathematical function of TRL and Integration Readiness Level（IRL） values for the components and connections of a particular system.SRL acceptance has been hindered because of concerns over SRL mathematical operations that may lead to inaccurate system readiness assessments.These inaccurate system readiness assessments are called readiness reversals.A new SRL calculation method using incidence matrices is proposed to alleviate these mathematical concerns.The presence of SRL readiness reversal is modeled for four SRL calculation methods across several system configurations.Logistic regression analysis demonstrates that the proposed Incidence Matrix SRL（IMSRL）method has a decreased presence of readiness reversal than other approaches suggested in the literature.Viable SRL methods will foster greater SRL adoption by systems engineering professionals and will support system development risk reduction goals.
文摘The construction industry is a major contributor to environmental pollution.The effect of the construction industry on the environment may be mitigated using eco-friendly construction materials,such as biocomposites.Once developed,biocomposites may offer a viable alternative to the current materials in use.However,biocomposites are lagging in terms of adoption and eventual use in the construction industry.This article provides insights into the steps for biocomposites to become a product that is ready to use by the construction industry in a structural role.The development and the adoption of such a material is tackled with the use of two concepts,i.e.,technology readiness level and roadmapping,and explored in a case study on the“liquid wood”.Furthermore,interviews in the construction industry are carried out to identify the industry’s take on biocomposites.A customized roadmap,which underlines a mostly nontechnical perspective concerning this material,has emerged.Additionally,the adoption and diffusion issues that the“liquid wood”may encounter are outlined and complemented with further recommendations.
文摘The world is rapidly adopting renewable energy alternatives at a remarkable rate to address the ever-increasing environmental crisis of CO_(2) emissions.Renewable energy system offers enormous potential to decarbonize the environment because they produce no greenhouse gases or other polluting emissions.However,the RES relies on natural resources for energy generation,such as sunlight,wind,water,geothermal,which are generally un-predictable and reliant on weather,season,and year.To account for these intermittencies,renewable energy can be stored using various techniques and then used in a consistent and controlled manner as needed.Several researchers from around the world have made substantial contributions over the last century to developing novel methods of energy storage that are efficient enough to meet increasing energy demand and technological break-throughs.This review attempts to provide a critical review of the advancements in the energy storage system from 1850-2022,including its evolution,classification,operating principles and comparison.
