Emily Dickenson’s poems have long enjoyed considerable acclaims from critics and common readers for her delicate and profound writing of life and death,love,nature,etc.Her short poem“My Life had stood—a Loaded Gun...Emily Dickenson’s poems have long enjoyed considerable acclaims from critics and common readers for her delicate and profound writing of life and death,love,nature,etc.Her short poem“My Life had stood—a Loaded Gun”is one receiving relatively few academic discussion.Among the rather few existent studies,many discuss Dickenson’s feminist ideas,religious bewilderment,literary creation views or even personal feeling in this poem.This article,instead,gives an interpretation of this poem from an ecocritical perspective.It points out that Emily Dickenson in this poem expresses her condemnation on human’s cruelty and indiffer?ence to nature.After a thorough interpretation of Dickenson’s reflection on human-nature relationship in this poem,the article fur?ther explores Dickenson’s attitudes toward nature through her personal writing background and clues in her other works to support this interpretation.展开更多
A path following controller is developed for underactuated ships with only surge force and yaw moment available to follow a predefined path.The proposed controller is based on nonswitch analytic model predictive contr...A path following controller is developed for underactuated ships with only surge force and yaw moment available to follow a predefined path.The proposed controller is based on nonswitch analytic model predictive control.It is shown that the optimal control law for a nonlinear path following system with ill-defined relative degree is continuous and nonsingular.The problem of ill-defined relative degree is solved.The path-following ability of the nonlinear system is guaranteed.Numerical simulations are provided to demonstrate the effectiveness of the proposed control law.展开更多
在快速发展的信息化时代,各领域数据增长飞快,但由于数据来源多、结构松散、关系复杂多样,数据共享存在一定的困难。本体的出现促进了各领域的信息共享,以军事领域为例,构建军事事件本体、武器装备本体和战场环境本体模型。然后建立属...在快速发展的信息化时代,各领域数据增长飞快,但由于数据来源多、结构松散、关系复杂多样,数据共享存在一定的困难。本体的出现促进了各领域的信息共享,以军事领域为例,构建军事事件本体、武器装备本体和战场环境本体模型。然后建立属性关系、时空关系和语义关系来表达领域信息关联关系,综合考虑军事领域多要素,清晰地表达军事事件、武器装备、战场环境之间的复杂关系;最后,将语义网规则语言(Semantic Web Rule Language,SWRL)特点与本体相结合,对本体进行语义推理,挖掘领域内存在的隐含关系,为实现各领域的信息共享和智能检索提供基础。展开更多
文摘Emily Dickenson’s poems have long enjoyed considerable acclaims from critics and common readers for her delicate and profound writing of life and death,love,nature,etc.Her short poem“My Life had stood—a Loaded Gun”is one receiving relatively few academic discussion.Among the rather few existent studies,many discuss Dickenson’s feminist ideas,religious bewilderment,literary creation views or even personal feeling in this poem.This article,instead,gives an interpretation of this poem from an ecocritical perspective.It points out that Emily Dickenson in this poem expresses her condemnation on human’s cruelty and indiffer?ence to nature.After a thorough interpretation of Dickenson’s reflection on human-nature relationship in this poem,the article fur?ther explores Dickenson’s attitudes toward nature through her personal writing background and clues in her other works to support this interpretation.
基金supported by the National Natural Science Foundation of China(No.50779033)the National High Technology Research and Development Program(863 Program)of China(No.2007AA11Z250)
文摘A path following controller is developed for underactuated ships with only surge force and yaw moment available to follow a predefined path.The proposed controller is based on nonswitch analytic model predictive control.It is shown that the optimal control law for a nonlinear path following system with ill-defined relative degree is continuous and nonsingular.The problem of ill-defined relative degree is solved.The path-following ability of the nonlinear system is guaranteed.Numerical simulations are provided to demonstrate the effectiveness of the proposed control law.
文摘在快速发展的信息化时代,各领域数据增长飞快,但由于数据来源多、结构松散、关系复杂多样,数据共享存在一定的困难。本体的出现促进了各领域的信息共享,以军事领域为例,构建军事事件本体、武器装备本体和战场环境本体模型。然后建立属性关系、时空关系和语义关系来表达领域信息关联关系,综合考虑军事领域多要素,清晰地表达军事事件、武器装备、战场环境之间的复杂关系;最后,将语义网规则语言(Semantic Web Rule Language,SWRL)特点与本体相结合,对本体进行语义推理,挖掘领域内存在的隐含关系,为实现各领域的信息共享和智能检索提供基础。
