Group role assignment(GRA)is originally a complex problem in role-based collaboration(RBC).The solution to GRA provides modelling techniques for more complex problems.GRA with constraints(GRA+)is categorized as a clas...Group role assignment(GRA)is originally a complex problem in role-based collaboration(RBC).The solution to GRA provides modelling techniques for more complex problems.GRA with constraints(GRA+)is categorized as a class of complex assignment problems.At present,there are few generally efficient solutions to this category of problems.Each special problem case requires a specific solution.Group multi-role assignment(GMRA)and GRA with conflicting agents on roles(GRACAR)are two problem cases in GRA+.The contributions of this paper include:1)The formalization of a new problem of GRA+,called group multi-role assignment with conflicting roles and agents(GMAC),which is an extension to the combination of GMRA and GRACAR;2)A practical solution based on an optimization platform;3)A sufficient condition,used in planning,for solving GMAC problems;and 4)A clear presentation of the benefits in avoiding conflicts when dealing with GMAC.The proposed methods are verified by experiments,simulations,proofs and analysis.展开更多
Development of man-packable,versatile marine surface vehicle with ability to rescue a drowning victim and also capable of carrying mission specific sensor is explored.Design thinking methodology is implemented by usin...Development of man-packable,versatile marine surface vehicle with ability to rescue a drowning victim and also capable of carrying mission specific sensor is explored.Design thinking methodology is implemented by using existing equipment/platform with the addition of external attachment to make it a functional product.Iterative prototyping process with extensive testing to achieve user-centric solution.Individual prototypes and their possible sub-configurations with their integration and characteristics are studied and compared with numerical model,inferences obtained are utilised to improve for the next iteration.A novel hinge-clamp assembly enables this marine surface vehicle to operate in the event of an overturn,this phenomenon is further studied with the aid of a mathematical model(Pendulum in a fluid).This research project aims to demonstrate a multi-role unmanned surface vehicle.展开更多
The paper first introduces the multi-roles of College English teachers, from the knowledge instillers to the designers and organizers of classroom activities, the participants of learning English, information counselo...The paper first introduces the multi-roles of College English teachers, from the knowledge instillers to the designers and organizers of classroom activities, the participants of learning English, information counselors and emotional supporters, and the models of morality. Based on this, the paper makes a detailed analysis of the multi-role effects which can not only stimulate students＇ creativity and improve their self-learning ability, but also adapt to the reform of College English teaching.展开更多
The characteristics of the confrontation between fighters and air-defense systems on ship are analyzed. The approach of simulating operations of both sides is presented based on the combination of random-factor effect...The characteristics of the confrontation between fighters and air-defense systems on ship are analyzed. The approach of simulating operations of both sides is presented based on the combination of random-factor effectiveness simulation models and deterministic models. Two basic indices are proposed to indicate task effectiveness （i. e. the survival probability of the fighter team and the specified effect of damage on the fleet） and relative algo- rithms. To verify the approach, the situation that a fighter team attacks a collective defense fleet is exemplified and the task effectiveness of this case is also calculated. The method for evaluating task effectiveness on anti-ship attack can be applied in aircraft design and tactical research.展开更多
目的探讨飞行员脑小血管病(cerebral small vessel disease,CSVD)整体相关危险因素。方法纳入2019年1月—2022年12月在空军特色医学中心住院经头颅核磁检查诊断为CSVD的飞行员72例为CSVD病例组,按照1:1的比例随机抽取头颅核磁检查无异...目的探讨飞行员脑小血管病(cerebral small vessel disease,CSVD)整体相关危险因素。方法纳入2019年1月—2022年12月在空军特色医学中心住院经头颅核磁检查诊断为CSVD的飞行员72例为CSVD病例组,按照1:1的比例随机抽取头颅核磁检查无异常的飞行员为对照组,比较2组飞行员脑血管病危险因素及飞行时间和机种的差异,并采用Logistic回归分析飞行员CSVD的独立危险因素。结果飞行员CSVD群体中脑白质高信号和血管周围间隙多见,并且存在多种影像分型联合的表现,CSVD病例组危险因素数量高于对照组,且总飞行时间和年飞行时间均高于对照组[1875.00(517.50,2975.00)h vs 1000.00(368.50,2200.00)h,P=0.027]、[126.83(104.55,153.35)h vs 115.77(90.50,136.46)h,P=0.021],CSVD病例组吸烟和高性能战斗机比例均高于对照组[22%vs 5.6%(χ^(2)=8.36,P=0.004)]、[29.2%vs 13.9%(χ^(2)=7.05,P=0.029)],Logistic回归分析显示吸烟史(OR=3.304,95%CI:1.172~9.317,P=0.024)、飞行机种(OR=4.607,95%CI:1.596~13.298,P=0.005)、年飞行时间(OR=2.699,95%CI:1.085~6.716,P=0.033)是飞行员的独立危险因素。结论飞行员患CSVD与吸烟、脑血管病危险因素数量、高性能战斗机及年飞行时间相关。展开更多
基金supported in part by Natural Sciences and Engineering Research Council,Canada(NSERC)(RGPIN-2018-04818)the funding from the Innovation for Defence Excellence and Security(IDEaS)Program from the Canadian Department of National Defence(DND)。
文摘Group role assignment(GRA)is originally a complex problem in role-based collaboration(RBC).The solution to GRA provides modelling techniques for more complex problems.GRA with constraints(GRA+)is categorized as a class of complex assignment problems.At present,there are few generally efficient solutions to this category of problems.Each special problem case requires a specific solution.Group multi-role assignment(GMRA)and GRA with conflicting agents on roles(GRACAR)are two problem cases in GRA+.The contributions of this paper include:1)The formalization of a new problem of GRA+,called group multi-role assignment with conflicting roles and agents(GMAC),which is an extension to the combination of GMRA and GRACAR;2)A practical solution based on an optimization platform;3)A sufficient condition,used in planning,for solving GMAC problems;and 4)A clear presentation of the benefits in avoiding conflicts when dealing with GMAC.The proposed methods are verified by experiments,simulations,proofs and analysis.
文摘Development of man-packable,versatile marine surface vehicle with ability to rescue a drowning victim and also capable of carrying mission specific sensor is explored.Design thinking methodology is implemented by using existing equipment/platform with the addition of external attachment to make it a functional product.Iterative prototyping process with extensive testing to achieve user-centric solution.Individual prototypes and their possible sub-configurations with their integration and characteristics are studied and compared with numerical model,inferences obtained are utilised to improve for the next iteration.A novel hinge-clamp assembly enables this marine surface vehicle to operate in the event of an overturn,this phenomenon is further studied with the aid of a mathematical model(Pendulum in a fluid).This research project aims to demonstrate a multi-role unmanned surface vehicle.
文摘The paper first introduces the multi-roles of College English teachers, from the knowledge instillers to the designers and organizers of classroom activities, the participants of learning English, information counselors and emotional supporters, and the models of morality. Based on this, the paper makes a detailed analysis of the multi-role effects which can not only stimulate students＇ creativity and improve their self-learning ability, but also adapt to the reform of College English teaching.
文摘The characteristics of the confrontation between fighters and air-defense systems on ship are analyzed. The approach of simulating operations of both sides is presented based on the combination of random-factor effectiveness simulation models and deterministic models. Two basic indices are proposed to indicate task effectiveness （i. e. the survival probability of the fighter team and the specified effect of damage on the fleet） and relative algo- rithms. To verify the approach, the situation that a fighter team attacks a collective defense fleet is exemplified and the task effectiveness of this case is also calculated. The method for evaluating task effectiveness on anti-ship attack can be applied in aircraft design and tactical research.
文摘目的探讨飞行员脑小血管病(cerebral small vessel disease,CSVD)整体相关危险因素。方法纳入2019年1月—2022年12月在空军特色医学中心住院经头颅核磁检查诊断为CSVD的飞行员72例为CSVD病例组,按照1:1的比例随机抽取头颅核磁检查无异常的飞行员为对照组,比较2组飞行员脑血管病危险因素及飞行时间和机种的差异,并采用Logistic回归分析飞行员CSVD的独立危险因素。结果飞行员CSVD群体中脑白质高信号和血管周围间隙多见,并且存在多种影像分型联合的表现,CSVD病例组危险因素数量高于对照组,且总飞行时间和年飞行时间均高于对照组[1875.00(517.50,2975.00)h vs 1000.00(368.50,2200.00)h,P=0.027]、[126.83(104.55,153.35)h vs 115.77(90.50,136.46)h,P=0.021],CSVD病例组吸烟和高性能战斗机比例均高于对照组[22%vs 5.6%(χ^(2)=8.36,P=0.004)]、[29.2%vs 13.9%(χ^(2)=7.05,P=0.029)],Logistic回归分析显示吸烟史(OR=3.304,95%CI:1.172~9.317,P=0.024)、飞行机种(OR=4.607,95%CI:1.596~13.298,P=0.005)、年飞行时间(OR=2.699,95%CI:1.085~6.716,P=0.033)是飞行员的独立危险因素。结论飞行员患CSVD与吸烟、脑血管病危险因素数量、高性能战斗机及年飞行时间相关。
