A catadioptric lens structure,also known as pancake lens,has been widely used in virtual reality(VR)displays to reduce the formfactor.However,the utilization of a half mirror(HM)to fold the optical path thrice leads t...A catadioptric lens structure,also known as pancake lens,has been widely used in virtual reality(VR)displays to reduce the formfactor.However,the utilization of a half mirror(HM)to fold the optical path thrice leads to a significant optical loss.The theoretical maximum optical efficiency is merely 25%.To transcend this optical efficiency constraint while retaining the foldable characteristic inherent to traditional pancake optics,in this paper,we propose a theoretically lossless folded optical system to replace the HM with a nonreciprocal polarization rotator.In our feasibility demonstration experiment,we used a commercial Faraday rotator(FR)and reflective polarizers to replace the lossy HM.The theoretically predicted 100%efficiency can be achieved approximately by using two high-extinction-ratio reflective polarizers.In addition,we evaluated the ghost images using a micro-OLED panel in our imaging system.Indeed,the ghost images can be suppressed to undetectable level if the optics are with antireflection coating.Our novel pancake optical system holds great potential for revolutionizing next-generation VR displays with lightweight,compact formfactor,and low power consumption.展开更多
In the present paper the approach of formalism was adopted to analyze Zhang Chengzhi' s work History of the Soul.According to the analysis to its form selection,unique style,the speaker' s voice and the symbol...In the present paper the approach of formalism was adopted to analyze Zhang Chengzhi' s work History of the Soul.According to the analysis to its form selection,unique style,the speaker' s voice and the symbol,it is proved that a proper form and literary experience function to each other.And a conclusion was drawn that this work both contains a fantasy in reality and a reality in history.It is a journey of the author' s soul,a real fiction.展开更多
BACKGROUND: Understanding bystander reactions to an emergency is an important component of effective training. Four stages of bystander intervention (BI) have been previously described: noticing the situation as a pro...BACKGROUND: Understanding bystander reactions to an emergency is an important component of effective training. Four stages of bystander intervention (BI) have been previously described: noticing the situation as a problem, interpreting when it is appropriate to intervene, recognizing personal responsibility to intervene, and knowing how to intervene. Using virtual reality (VR) to simulate emergencies such as sudden cardiac arrest (SCA) can be used to study these stages. METHODS: In a secondary analysis of an observational cohort study, we analyzed bystander self-effi cacy for stages of BI before and after simulated SCA. Each subject participated in a singleplayer, immersive, VR SCA scenario. Subjects interacted with simulated bystanders through voice commands (“call 911”,“get an AED”). Actions taken in scenario, like performing CPR, were documented. Scenario BI actions were compared based on dichotomized comfort/discomfort. RESULTS: From June 2016 to June 2017, 119 subjects participated. Average age was 37±14 years, 44% were female and 46% reported CPR training within 2 years. During the scenario, 98%“noticed the event” and “interpreted it as a problem”, 78%“took responsibility”, and 54%“possessed the necessary skills”. Self-effi cacy increased from pre- to post-scenario: noticing the event increased from 80% to 96%;interpreting as a problem increased from 86% to 97%;taking responsibility increased from 56% to 93%;possessing necessary skills increased from 47% to 63%(P<0.001). CONCLUSION: Self-efficacy to respond to an SCA event increased pre- to post-scenario. Bystanders who reported feeling comfortable “taking responsibility to intervene” during an emergency were more likely to take action during a simulated emergency.展开更多
In Tennessee Williams’masterpiece The Glass Menagerie,the most remarkable feature is considered to be the successful employment of symbolism.Through the textual analysis,this paper thus gives a systematic analysis of...In Tennessee Williams’masterpiece The Glass Menagerie,the most remarkable feature is considered to be the successful employment of symbolism.Through the textual analysis,this paper thus gives a systematic analysis of some important symbolic images in stage spectacle,including"lighting","screen","fire-escape","unicorn,""Jonquil"and"father’s photo."These symbols effectively highlight the theme—the collision between reality and dream,which vividly exposes the tragic living situation of the lower class in America during the Great Depression.展开更多
Augmented reality(AR)and virtual reality(VR)are two novel display technologies that are under updates.The essential feature of AR/VR is the full-color display that requires high pixel densities.To generate three-color...Augmented reality(AR)and virtual reality(VR)are two novel display technologies that are under updates.The essential feature of AR/VR is the full-color display that requires high pixel densities.To generate three-color pixels,the fluorescent color conversion layer inevitably includes green and red pixels.To fabricate such sort of display kits,inkjet printing is a promising way to position the color conversion layers.In this review article,the progress of AR/VR technologies is first reviewed,and in succession,the state of the art of inkjet printing,as well as two key issues-the optimization of ink and the reduction of coffee-ring effects,are introduced.Finally,some potential problems associated with the color converting layer are highlighted.展开更多
1 Introduction Early detection and diagnosis of stable coronary artery disease （SCAD） is essential for proactive secondary prevention of myocardial infarction （MI）, control of disease progress, and reduction of mo...1 Introduction Early detection and diagnosis of stable coronary artery disease （SCAD） is essential for proactive secondary prevention of myocardial infarction （MI）, control of disease progress, and reduction of mortality. Clinical decision-making in modem medicine is increasingly dependent on cardiovascular imaging techniques. 2012 ACCF/AHA/ACP/AATS/ PCNA/SCAI/STS guideline for the diagnosis and management of patients with stable ischemic heart disease has been issued by American Heart Association （AHA）. European Society of Cardiology （ESC） has issued 2013 ESC guidelines on the management of stable coronary artery disease.展开更多
Because decompensated heart failure(HF)patients present primarily with symptoms of congestion,the assessment of volume status is of paramount importance.Despite the addition of new technologies that can predict intrac...Because decompensated heart failure(HF)patients present primarily with symptoms of congestion,the assessment of volume status is of paramount importance.Despite the addition of new technologies that can predict intracardiac filling pressures,the physical exam(PE)remains the most accessible and cost-effective tool available to clinicians.An elevated jugular venous pressure(JVP) is considered the most sensitive sign of volume overload,although the commonly used‘method of Lewis’has several limitations.A useful cutoff is that if the JVP is greater than 3 cm in vertical distance above the sternal angle,the central venous pressure is elevated.In addition to assessment of volume status,the PE in HF can reveal adverse prognostic signs,namely:elevated JVP,presence of third heart sound,elevated heart rate,low systolic BP,and low proportional pulse pressure(＜25%).This article will review the evidence for the diagnostic and prognostic utility of common PE findings in HF.展开更多
In postmodernist novel, the explanation of the relationship between fiction and reality is a distinctive feature, known as a playing game. In Continuity of Parks, the "game" is played through the application...In postmodernist novel, the explanation of the relationship between fiction and reality is a distinctive feature, known as a playing game. In Continuity of Parks, the "game" is played through the application of colors, settings, props, etc. with the plots' evolution. It is helpful to appreciate the postmodernist novel by analysing the relationship.展开更多
Construction of a lighting model of the real world is one of the critical aims in an augmented reality (AR) system. The theory of lighting modeling used in computer graphics(CG) is applied in this study. The position...Construction of a lighting model of the real world is one of the critical aims in an augmented reality (AR) system. The theory of lighting modeling used in computer graphics(CG) is applied in this study. The position of the real light-source is first conjectured from light and shade of the registration image element by element using a ray tracking algorithm. Then the virtual light-source and virtual fiducial are constructed in the CG environment, in which, the Phong model is used to draw the light effect. By comparing the CG scene with the real image, one can modify the parameters of the lighting model over and over again, until the lighting effect of the CG scene is close enough to that of the real image. It is proved that this method works well in the indoor AR system. The method can be used feasibly in most applications with some improvements.展开更多
The concentrically layered thermal cloaks with isotropic materials could realize the equivalent thermal cloaking effect with Pendry＇s cloak, while the effectiveness is scarcely investigated quantitatively. Here we ex...The concentrically layered thermal cloaks with isotropic materials could realize the equivalent thermal cloaking effect with Pendry＇s cloak, while the effectiveness is scarcely investigated quantitatively. Here we examine the cloaking effectiveness quantitatively by evaluating the standard deviation of the temperature difference between the simulated plane with the layered thermal cloak and Pendry＇s thermal cloak. The design rules for the isotropic materials in terms of thermal conductivity and layer thickness are presented. The present method could quan- titatively evaluate the cloaking effectiveness, and could open avenues for analyzing the cloaking effect, detecting the （anti-） cloaks, etc.展开更多
Augmented solar images were used to research the adaptability of four representative image extraction and matching algorithms in space weather domain.These include the scale-invariant feature transform algorithm,speed...Augmented solar images were used to research the adaptability of four representative image extraction and matching algorithms in space weather domain.These include the scale-invariant feature transform algorithm,speeded-up robust features algorithm,binary robust invariant scalable keypoints algorithm,and oriented fast and rotated brief algorithm.The performance of these algorithms was estimated in terms of matching accuracy,feature point richness,and running time.The experiment result showed that no algorithm achieved high accuracy while keeping low running time,and all algorithms are not suitable for image feature extraction and matching of augmented solar images.To solve this problem,an improved method was proposed by using two-frame matching to utilize the accuracy advantage of the scale-invariant feature transform algorithm and the speed advantage of the oriented fast and rotated brief algorithm.Furthermore,our method and the four representative algorithms were applied to augmented solar images.Our application experiments proved that our method achieved a similar high recognition rate to the scale-invariant feature transform algorithm which is significantly higher than other algorithms.Our method also obtained a similar low running time to the oriented fast and rotated brief algorithm,which is significantly lower than other algorithms.展开更多
Donald Barthelme is known for his playful,postmodernist style of short fiction.In his The Glass Mountain,he created an absurd world shocking to readers.This paper explores the reality behind the absurd story based on ...Donald Barthelme is known for his playful,postmodernist style of short fiction.In his The Glass Mountain,he created an absurd world shocking to readers.This paper explores the reality behind the absurd story based on the analysis of its the post-modernism features to better the understanding of the fiction.展开更多
As one of the most outstanding representatives of the Pre-Romanticism poet in 18th century English literature,Wil liam Blake lived through and witnessed an era of great political and social upheaval and transitional p...As one of the most outstanding representatives of the Pre-Romanticism poet in 18th century English literature,Wil liam Blake lived through and witnessed an era of great political and social upheaval and transitional period:the American War of Independence,the French Revolution,the Napoleonic Wars and the Industrial Revolution which brought about significant and essential impact on social and historical progress in England.Coming from the social injustices and the full of the dark-side of the industrial England,Blake caught the pulse of his times through his sharp and deep insight,and employed his symbolism,satiric and allegorical device to condemn and criticize the oppression and exploitation derived from the class inequality,privilege and tyr anny.Through his painting and poetry,Blake lashed the dark and indifferent church and authority,and exposed the hypocrisy and falsehood of the religion and humanity,and also called on the oppressed to shatter mental and physical restriction "The mind-forged manacles" come from the ruling class.In this paper,I want to introduce and interpret the social reality as reflected in the poetry of William Blake through concrete analyzing some of Blake's poems in terms of main ideas,historical settings,rhe torical device and language character which underlay and concealed in his poetry deeply.展开更多
Relevance Theory mainly emphasizes the transmission,utterance and inference of the communicative target.In this process,the communicators should create the best communication context according to communicative target ...Relevance Theory mainly emphasizes the transmission,utterance and inference of the communicative target.In this process,the communicators should create the best communication context according to communicative target and purpose to achieve the optimal relevance between the communication content and the background information of communicators.The basic conclusion to be drawn from this thesis is that the subtitle translator’s task is to guarantee the target-language audience able to enjoy the original dramatic experience as the source-language audience with the least processing efforts.展开更多
In recent years,more and more students relay on universal composition templates.Students believe that the"universal composition template"can cope with all kinds of English tests.How the pros and cons of writ...In recent years,more and more students relay on universal composition templates.Students believe that the"universal composition template"can cope with all kinds of English tests.How the pros and cons of writing methods seem to put things right once and for all?How’s enlightening significance to English teaching?In this paper,based on the two language acquisition theory and analyze the advantages and disadvantages of the composition template,some suggestion are given to the students to improve their English writing level.展开更多
There are a great many escapists in modern American drama, who indulge in their past or escape into the fort of dream. Great change of society, as well as traditional values, gives an impact on the escapists. They fee...There are a great many escapists in modern American drama, who indulge in their past or escape into the fort of dream. Great change of society, as well as traditional values, gives an impact on the escapists. They feel mixed-up and perplexed about their lives and future. The conflicts among pursuit and disillusionment, past and present, tradition and modernity, material and spirit, ideal and reality make the escapists choose to build a wall to separate them from the real world. They become the souls drifting in the reality, without knowing their status in society or the meaning of life.展开更多
To most contemporary readers and audiences alike,The Zoo Story is an often-forgotten play;however,it is belongs to the category of the classics,which is mind-blowing,interesting and enjoyable.Considered as a represent...To most contemporary readers and audiences alike,The Zoo Story is an often-forgotten play;however,it is belongs to the category of the classics,which is mind-blowing,interesting and enjoyable.Considered as a representative work of"Theatre of the Absurd",it explores seriously the significance in humanity’s spiritual,moral,and intellectual life.The failure to communicate is graphically illustrated in the story of Jerry and the Dog,which may happen to almost everyone in the modern society.展开更多
The Journey to the West has adopted a conventional theme--life is a journey;in order to deliver one's soul,one has to go on the path of salvation.The purpose of this paper is to examine what steps the author has t...The Journey to the West has adopted a conventional theme--life is a journey;in order to deliver one's soul,one has to go on the path of salvation.The purpose of this paper is to examine what steps the author has taken to enlighten the readers as to the progress of spiritual salvation.In view of this purpose,the analysis will be focused on the preaching of religious doctrines and the criticism of social realities in the novel.展开更多
Virtual reality(VR)simulations are some of the alternative practice environments for safety education.Trainees gain experience under the most realistic conditions without being exposed to any real hazard.Virtual reali...Virtual reality(VR)simulations are some of the alternative practice environments for safety education.Trainees gain experience under the most realistic conditions without being exposed to any real hazard.Virtual reality also serves as a tool to expedite the decision-making process where quick decisions and actions are necessities for a safe operation.One example of such a situation in underground mines is the failure risks in a tunnel face after blasting.Ground support systems must be installed based on the stand-up time to ensure the safe access of personnel and equipment to the working area.Generally,a competent person inspects the area to identify risks and determines the required support systems.However,training of a competent person requires large amount of time and effort.This study presents virtual reality simulations developed for improving the assessment of the roof fall hazards and taking necessary measures for mitigating the risk related to roof fall.The virtual reality simulation involves decision-making tasks for a particular scenario in which participants can experience creating a safe working environment in a timely manner.First,they are asked to identify the potential hazard in a tunnel after blasting,namely,rock fall,wedge failure or groundwater inflow.If the hazard identification is successful,participants are requested to install rock bolts as a safety measure by selecting the bolt pattern(e.g.bolt length and spacing).Finally,participants evaluate the roof fall hazard by viewing displacements around the opening,before and after the support measures.This study illustrates the benefits of VR in safety training as well as enhancing the decision-making process to enhance safety.展开更多
文摘A catadioptric lens structure,also known as pancake lens,has been widely used in virtual reality(VR)displays to reduce the formfactor.However,the utilization of a half mirror(HM)to fold the optical path thrice leads to a significant optical loss.The theoretical maximum optical efficiency is merely 25%.To transcend this optical efficiency constraint while retaining the foldable characteristic inherent to traditional pancake optics,in this paper,we propose a theoretically lossless folded optical system to replace the HM with a nonreciprocal polarization rotator.In our feasibility demonstration experiment,we used a commercial Faraday rotator(FR)and reflective polarizers to replace the lossy HM.The theoretically predicted 100%efficiency can be achieved approximately by using two high-extinction-ratio reflective polarizers.In addition,we evaluated the ghost images using a micro-OLED panel in our imaging system.Indeed,the ghost images can be suppressed to undetectable level if the optics are with antireflection coating.Our novel pancake optical system holds great potential for revolutionizing next-generation VR displays with lightweight,compact formfactor,and low power consumption.
文摘In the present paper the approach of formalism was adopted to analyze Zhang Chengzhi' s work History of the Soul.According to the analysis to its form selection,unique style,the speaker' s voice and the symbol,it is proved that a proper form and literary experience function to each other.And a conclusion was drawn that this work both contains a fantasy in reality and a reality in history.It is a journey of the author' s soul,a real fiction.
基金supported by the Medtronic Foundationthe Laerdal Foundation
文摘BACKGROUND: Understanding bystander reactions to an emergency is an important component of effective training. Four stages of bystander intervention (BI) have been previously described: noticing the situation as a problem, interpreting when it is appropriate to intervene, recognizing personal responsibility to intervene, and knowing how to intervene. Using virtual reality (VR) to simulate emergencies such as sudden cardiac arrest (SCA) can be used to study these stages. METHODS: In a secondary analysis of an observational cohort study, we analyzed bystander self-effi cacy for stages of BI before and after simulated SCA. Each subject participated in a singleplayer, immersive, VR SCA scenario. Subjects interacted with simulated bystanders through voice commands (“call 911”,“get an AED”). Actions taken in scenario, like performing CPR, were documented. Scenario BI actions were compared based on dichotomized comfort/discomfort. RESULTS: From June 2016 to June 2017, 119 subjects participated. Average age was 37±14 years, 44% were female and 46% reported CPR training within 2 years. During the scenario, 98%“noticed the event” and “interpreted it as a problem”, 78%“took responsibility”, and 54%“possessed the necessary skills”. Self-effi cacy increased from pre- to post-scenario: noticing the event increased from 80% to 96%;interpreting as a problem increased from 86% to 97%;taking responsibility increased from 56% to 93%;possessing necessary skills increased from 47% to 63%(P<0.001). CONCLUSION: Self-efficacy to respond to an SCA event increased pre- to post-scenario. Bystanders who reported feeling comfortable “taking responsibility to intervene” during an emergency were more likely to take action during a simulated emergency.
文摘In Tennessee Williams’masterpiece The Glass Menagerie,the most remarkable feature is considered to be the successful employment of symbolism.Through the textual analysis,this paper thus gives a systematic analysis of some important symbolic images in stage spectacle,including"lighting","screen","fire-escape","unicorn,""Jonquil"and"father’s photo."These symbols effectively highlight the theme—the collision between reality and dream,which vividly exposes the tragic living situation of the lower class in America during the Great Depression.
基金supported by the National Natural Science Foundation of China (11904302)the Fundamental Research Funds for the Central Universities (Grant No.20720190005)+1 种基金the Major Science and Technology Project of Xiamen in China (3502Z20191015)Hong Kong University of Science and Technology-Foshan Joint Research Program (FSUST19-FYTRI11)
文摘Augmented reality(AR)and virtual reality(VR)are two novel display technologies that are under updates.The essential feature of AR/VR is the full-color display that requires high pixel densities.To generate three-color pixels,the fluorescent color conversion layer inevitably includes green and red pixels.To fabricate such sort of display kits,inkjet printing is a promising way to position the color conversion layers.In this review article,the progress of AR/VR technologies is first reviewed,and in succession,the state of the art of inkjet printing,as well as two key issues-the optimization of ink and the reduction of coffee-ring effects,are introduced.Finally,some potential problems associated with the color converting layer are highlighted.
文摘1 Introduction Early detection and diagnosis of stable coronary artery disease （SCAD） is essential for proactive secondary prevention of myocardial infarction （MI）, control of disease progress, and reduction of mortality. Clinical decision-making in modem medicine is increasingly dependent on cardiovascular imaging techniques. 2012 ACCF/AHA/ACP/AATS/ PCNA/SCAI/STS guideline for the diagnosis and management of patients with stable ischemic heart disease has been issued by American Heart Association （AHA）. European Society of Cardiology （ESC） has issued 2013 ESC guidelines on the management of stable coronary artery disease.
文摘Because decompensated heart failure(HF)patients present primarily with symptoms of congestion,the assessment of volume status is of paramount importance.Despite the addition of new technologies that can predict intracardiac filling pressures,the physical exam(PE)remains the most accessible and cost-effective tool available to clinicians.An elevated jugular venous pressure(JVP) is considered the most sensitive sign of volume overload,although the commonly used‘method of Lewis’has several limitations.A useful cutoff is that if the JVP is greater than 3 cm in vertical distance above the sternal angle,the central venous pressure is elevated.In addition to assessment of volume status,the PE in HF can reveal adverse prognostic signs,namely:elevated JVP,presence of third heart sound,elevated heart rate,low systolic BP,and low proportional pulse pressure(＜25%).This article will review the evidence for the diagnostic and prognostic utility of common PE findings in HF.
文摘In postmodernist novel, the explanation of the relationship between fiction and reality is a distinctive feature, known as a playing game. In Continuity of Parks, the "game" is played through the application of colors, settings, props, etc. with the plots' evolution. It is helpful to appreciate the postmodernist novel by analysing the relationship.
文摘Construction of a lighting model of the real world is one of the critical aims in an augmented reality (AR) system. The theory of lighting modeling used in computer graphics(CG) is applied in this study. The position of the real light-source is first conjectured from light and shade of the registration image element by element using a ray tracking algorithm. Then the virtual light-source and virtual fiducial are constructed in the CG environment, in which, the Phong model is used to draw the light effect. By comparing the CG scene with the real image, one can modify the parameters of the lighting model over and over again, until the lighting effect of the CG scene is close enough to that of the real image. It is proved that this method works well in the indoor AR system. The method can be used feasibly in most applications with some improvements.
基金Supported by the National Natural Science Foundation of China under Grant Nos 51576078 and 51376070
文摘The concentrically layered thermal cloaks with isotropic materials could realize the equivalent thermal cloaking effect with Pendry＇s cloak, while the effectiveness is scarcely investigated quantitatively. Here we examine the cloaking effectiveness quantitatively by evaluating the standard deviation of the temperature difference between the simulated plane with the layered thermal cloak and Pendry＇s thermal cloak. The design rules for the isotropic materials in terms of thermal conductivity and layer thickness are presented. The present method could quan- titatively evaluate the cloaking effectiveness, and could open avenues for analyzing the cloaking effect, detecting the （anti-） cloaks, etc.
基金Supported by the Key Research Program of the Chinese Academy of Sciences(ZDRE-KT-2021-3)。
文摘Augmented solar images were used to research the adaptability of four representative image extraction and matching algorithms in space weather domain.These include the scale-invariant feature transform algorithm,speeded-up robust features algorithm,binary robust invariant scalable keypoints algorithm,and oriented fast and rotated brief algorithm.The performance of these algorithms was estimated in terms of matching accuracy,feature point richness,and running time.The experiment result showed that no algorithm achieved high accuracy while keeping low running time,and all algorithms are not suitable for image feature extraction and matching of augmented solar images.To solve this problem,an improved method was proposed by using two-frame matching to utilize the accuracy advantage of the scale-invariant feature transform algorithm and the speed advantage of the oriented fast and rotated brief algorithm.Furthermore,our method and the four representative algorithms were applied to augmented solar images.Our application experiments proved that our method achieved a similar high recognition rate to the scale-invariant feature transform algorithm which is significantly higher than other algorithms.Our method also obtained a similar low running time to the oriented fast and rotated brief algorithm,which is significantly lower than other algorithms.
文摘Donald Barthelme is known for his playful,postmodernist style of short fiction.In his The Glass Mountain,he created an absurd world shocking to readers.This paper explores the reality behind the absurd story based on the analysis of its the post-modernism features to better the understanding of the fiction.
文摘As one of the most outstanding representatives of the Pre-Romanticism poet in 18th century English literature,Wil liam Blake lived through and witnessed an era of great political and social upheaval and transitional period:the American War of Independence,the French Revolution,the Napoleonic Wars and the Industrial Revolution which brought about significant and essential impact on social and historical progress in England.Coming from the social injustices and the full of the dark-side of the industrial England,Blake caught the pulse of his times through his sharp and deep insight,and employed his symbolism,satiric and allegorical device to condemn and criticize the oppression and exploitation derived from the class inequality,privilege and tyr anny.Through his painting and poetry,Blake lashed the dark and indifferent church and authority,and exposed the hypocrisy and falsehood of the religion and humanity,and also called on the oppressed to shatter mental and physical restriction "The mind-forged manacles" come from the ruling class.In this paper,I want to introduce and interpret the social reality as reflected in the poetry of William Blake through concrete analyzing some of Blake's poems in terms of main ideas,historical settings,rhe torical device and language character which underlay and concealed in his poetry deeply.
文摘Relevance Theory mainly emphasizes the transmission,utterance and inference of the communicative target.In this process,the communicators should create the best communication context according to communicative target and purpose to achieve the optimal relevance between the communication content and the background information of communicators.The basic conclusion to be drawn from this thesis is that the subtitle translator’s task is to guarantee the target-language audience able to enjoy the original dramatic experience as the source-language audience with the least processing efforts.
文摘In recent years,more and more students relay on universal composition templates.Students believe that the"universal composition template"can cope with all kinds of English tests.How the pros and cons of writing methods seem to put things right once and for all?How’s enlightening significance to English teaching?In this paper,based on the two language acquisition theory and analyze the advantages and disadvantages of the composition template,some suggestion are given to the students to improve their English writing level.
文摘There are a great many escapists in modern American drama, who indulge in their past or escape into the fort of dream. Great change of society, as well as traditional values, gives an impact on the escapists. They feel mixed-up and perplexed about their lives and future. The conflicts among pursuit and disillusionment, past and present, tradition and modernity, material and spirit, ideal and reality make the escapists choose to build a wall to separate them from the real world. They become the souls drifting in the reality, without knowing their status in society or the meaning of life.
文摘To most contemporary readers and audiences alike,The Zoo Story is an often-forgotten play;however,it is belongs to the category of the classics,which is mind-blowing,interesting and enjoyable.Considered as a representative work of"Theatre of the Absurd",it explores seriously the significance in humanity’s spiritual,moral,and intellectual life.The failure to communicate is graphically illustrated in the story of Jerry and the Dog,which may happen to almost everyone in the modern society.
文摘The Journey to the West has adopted a conventional theme--life is a journey;in order to deliver one's soul,one has to go on the path of salvation.The purpose of this paper is to examine what steps the author has taken to enlighten the readers as to the progress of spiritual salvation.In view of this purpose,the analysis will be focused on the preaching of religious doctrines and the criticism of social realities in the novel.
文摘Virtual reality(VR)simulations are some of the alternative practice environments for safety education.Trainees gain experience under the most realistic conditions without being exposed to any real hazard.Virtual reality also serves as a tool to expedite the decision-making process where quick decisions and actions are necessities for a safe operation.One example of such a situation in underground mines is the failure risks in a tunnel face after blasting.Ground support systems must be installed based on the stand-up time to ensure the safe access of personnel and equipment to the working area.Generally,a competent person inspects the area to identify risks and determines the required support systems.However,training of a competent person requires large amount of time and effort.This study presents virtual reality simulations developed for improving the assessment of the roof fall hazards and taking necessary measures for mitigating the risk related to roof fall.The virtual reality simulation involves decision-making tasks for a particular scenario in which participants can experience creating a safe working environment in a timely manner.First,they are asked to identify the potential hazard in a tunnel after blasting,namely,rock fall,wedge failure or groundwater inflow.If the hazard identification is successful,participants are requested to install rock bolts as a safety measure by selecting the bolt pattern(e.g.bolt length and spacing).Finally,participants evaluate the roof fall hazard by viewing displacements around the opening,before and after the support measures.This study illustrates the benefits of VR in safety training as well as enhancing the decision-making process to enhance safety.
