In this paper,some basic theories and terms of language testing,like types of language tests and qualities of good tests were briefly discussed.Then CET3(College English Test Band3) in Beijing was analyzed from three ...In this paper,some basic theories and terms of language testing,like types of language tests and qualities of good tests were briefly discussed.Then CET3(College English Test Band3) in Beijing was analyzed from three perspectives:design principles,item formats and test content. In the end,some suggestions were given to improve this test.展开更多
Background:Subjective measures of auditory development are equally important as objective measures to obtain a realistic image of the hearing status in infants and toddlers.Objectives:The objectives of the current stu...Background:Subjective measures of auditory development are equally important as objective measures to obtain a realistic image of the hearing status in infants and toddlers.Objectives:The objectives of the current study were to translate and validate the LittleEARS questionnaire into the Hindi language,to calculate its psychometric properties and establish a regression curve of the scores obtained as a function of age,to calculate the inter-test and test retest reliability of the same.The secondary objectives were to compare the scores obtained by the normal hearing children and those with hearing impairment and to plot a regression curve of total scores obtained by the hearing-impaired children as a function of the duration of auditory training attended since their first fit of the device.Materials and methods:The procedures involved conventional translation,reverse translation,and content validation before administering the questionnaire.The translated version was administered to parents of 59 children with normal hearing and 41 children with hearing impairment.Results:The finalized version had good reliability and efficient internal consistency with a Cronbach alpha value of 0.96.The mean scores obtained by the normal hearing children showed a progressive pattern as a function of age.Conclusion:The LittleEARS questionnaire has been successfully translated and validated into the Hindi language with excellent validity and reliability and can be used for screening and early identification of hearing impairment and in evaluating the outcome of audiological treatment approaches.展开更多
This paper outlines a framework to use computer and natural language techniques for various levels of learners to learn foreign languages in Computer-based Learning environment.We propose some ideas for using the comp...This paper outlines a framework to use computer and natural language techniques for various levels of learners to learn foreign languages in Computer-based Learning environment.We propose some ideas for using the computer as a practical tool for learning foreign language where the most of courseware is generated automatically.We then describe how to build Computer-based Learning tools,discuss its effectiveness,and conclude with some possibilities using on-line resources.展开更多
In order to ensure the safety,quality and efficiency of computer numerical control(CNC)machine tool processing,a real-time monitoring and visible solution for CNC machine tools based on hyper text markup language(HTML...In order to ensure the safety,quality and efficiency of computer numerical control(CNC)machine tool processing,a real-time monitoring and visible solution for CNC machine tools based on hyper text markup language(HTML)5 is proposed.The characteristics of the real-time monitoring technology of CNC machine tools under the traditional Client/Server(C/S)structure are compared and analyzed,and the technical drawbacks are proposed.Web real-time communication technology and browser drawing technology are deeply studied.A real-time monitoring and visible system for CNC machine tool data is developed based on Metro platform,combining WebSocket real-time communication technology and Canvas drawing technology.The system architecture is given,and the functions and implementation methods of the system are described in detail.The practical application results show that the WebSocket real-time communication technology can effectively reduce the bandwidth and network delay and save server resources.The numerical control machine data monitoring system can intuitively reflect the machine data,and the visible effect is good.It realizes timely monitoring of equipment alarms and prompts maintenance and management personnel.展开更多
地点:中国旅行社驻外分社营业部Setting:China Travel Service,Overseas Branch人物:杰克·乔治、黄先生Characters:Jack George and Mr.Huang 会话 Dialogue黄先生:乔治先生,您决定了没有?Mr.Huang:Have you made up your mind,Mr....地点:中国旅行社驻外分社营业部Setting:China Travel Service,Overseas Branch人物:杰克·乔治、黄先生Characters:Jack George and Mr.Huang 会话 Dialogue黄先生:乔治先生,您决定了没有?Mr.Huang:Have you made up your mind,Mr.George?乔治:你叫我杰克好了。我决定从上海入境。展开更多
Language stood in the foreground of George Orwell's social and political thinking. Language is not only a vehicle for transmitting ideas, but also a product originating from social and political interactions. This...Language stood in the foreground of George Orwell's social and political thinking. Language is not only a vehicle for transmitting ideas, but also a product originating from social and political interactions. This paper examines the language, particularly the abuse of language, in the context of politics presented in Nineteen Eighty-Four, so as to find out George Orwell's view of language: language as a manipulated tool to control people's minds.展开更多
In recent decades, many additives with different characteristics have been applied to strengthen and toughen Al2O3-based ceramic cutting tool materials. Among them, SiC whiskers and SiC nanoparticles showed excellent ...In recent decades, many additives with different characteristics have been applied to strengthen and toughen Al2O3-based ceramic cutting tool materials. Among them, SiC whiskers and SiC nanoparticles showed excellent performance in improving the material properties. While no attempts have been made to add SiC whiskers and SiC nanoparticles together into the ceramic matrix and the synergistically toughening effects of them have not been studied. An Al2O3-SiCw-SiC np advanced ceramic cutting tool material is fabricated by adding both one-dimensional SiC whiskers and zero-dimensional SiC nanoparticles into the Al2O3 matrix with an effective dispersing and mixing process. The composites with 25 vol% SiC whiskers and 25 vol% SiC nanoparticles alone are also investegated for comparison purposes. Results show that the Al2O3-SiCw-SiCnp composite with both 20 vo1% SiC whiskers and 5 vol% SiC nanoparticles additives have much improved mechanical properties. The flexural strength of Al2O3-SiCw-SiCnp is 730＋ 95 MPa and fracture toughness is 5.6 ± 0.6 MPa.m1/2. The toughening and strengthening mechanisms of SiC whiskers and nanoparticles are studied when they are added either individually or in combination. It is indicated that when SiC whiskers and nanoparticles are added together, the grains are further refined and homogenized, so that the microstructure and fracture mode ratio is modified. The SiC nanoparticles are found helpful to enhance the toughening effects of the SiC whiskers. The proposed research helps to enrich the types of ceramic cutting tool and is benefit to expand the application range of ceramic cutting tool.展开更多
C-276 nickel-based alloy is a difficult-to-cut material. In high-speed machining of Hastelloy C-276, notching is a prominent failure mode due to high mechanical properties of work piece, which results in the short too...C-276 nickel-based alloy is a difficult-to-cut material. In high-speed machining of Hastelloy C-276, notching is a prominent failure mode due to high mechanical properties of work piece, which results in the short tool life and low productivity. In this paper, a newly developed Ti（C7N3）-based cermet insert manufactured by a hot-pressing method is used to machine the C-276 nickel-based alloy, and its cutting performances are studied. Based on orthogonal experiment method, the influence of cutting parameters on tool life, material removal rates and surface roughness are investigated. Experimental research results indicate that the optimal cutting condition is a cutting speed of 50 m/min, depth of cut of 0.4 mm and feed rate of 0.15 mm/r if the tool life and material removal rates are considered comprehensively. In this case, the tool life is 32 min and material removal rates are 3000 mm^3/min, which is appropriate to the rough machining. If the tool life and surface roughness are considered, the better cutting condition is a cutting speed of 75 m/min, depth of cut of 0.6 mm and feed rate of 0.1 mm/r. In this case, the surface roughness is 0.59μm. Notch wear, flank wear, chipping at the tool nose, built-up edge（BUE） and micro-cracks are found when Ti（C7N3）-based cermet insert turned Hastelloy C-276. Oxidation, adhesive, abrasive and diffusion are the wear mechanisms, which can be investigated by the observations of scanning electron microscope and energy-dispersive spectroscopy. This research will help to guide studies on the evaluation of machining parameters to further advance the productivity of nickel based alloy Hastelloy C-276 machining.展开更多
A two streams system seems to exist for tactile perception.We asked kindergarten children to identify(semantic)and describe the function of grasped unseen instruments of their daily life(fork,knife,spoon,brush,toothbr...A two streams system seems to exist for tactile perception.We asked kindergarten children to identify(semantic)and describe the function of grasped unseen instruments of their daily life(fork,knife,spoon,brush,toothbrush,pencil,and scissor),and then,to simulate its use(pragmatic).The capacity to describe the function of the set of instruments was significantly superior to that of identifying them by name,although there was a significant direct association between identification and description of the function in the responses to the set of instruments.The simulation of the instrument function was of two types:(i)use―the child simulated how the instrument is grasped and used;and(ii)incorporation―the child simulated the function of the instrument with her/his own hand.The results support the hypothesis of a two streams tactile system(semantic and pragmatic),and that kindergarten children have the ability to incorporate functional properties of instruments of their daily life,probably as a support for language development.展开更多
In the plurilingual and multicultural contemporary international setting,the educational systems opt for successfully meeting as well as adapting to the rapid social,economic,and technological changes.Based on the pre...In the plurilingual and multicultural contemporary international setting,the educational systems opt for successfully meeting as well as adapting to the rapid social,economic,and technological changes.Based on the premise that intercultural communicative competence holds a significant potential for foreign language instruction,focus should throw into combining teachers’intercultural knowledge with pedagogy and technology.The prospect of introducing intercultural material within the context of teaching scenarios in the curricula of a technology-enhanced foreign language learning environment where the Technological Pedagogical Content Knowledge(TPACK)approach is implemented,can positively contribute to the teaching process.Under this perspective,cultural and digitally competent teachers can create a framework which will enable learners to fully develop their interactive and linguistic skills and to effectively communicate in a foreign language promoting its social and multicultural dimension whatever the intercultural context.展开更多
Chinese college English Language Curriculum is a complicated teaching system combined with a variety of teaching modes and teaching methodologies. It is guided by foreign language teaching theories and takes the Engli...Chinese college English Language Curriculum is a complicated teaching system combined with a variety of teaching modes and teaching methodologies. It is guided by foreign language teaching theories and takes the English language knowledge and application skills, cross-cultural communication and learning strategies as its main content. In addition, as the main basis of English education for non-English major undergraduates in colleges and universities, this curriculum helps to cultivate students' English comprehensive application ability, especially for their listening and speaking skills while improving their abilities of selfeducation. It can also strengthen learners' comprehensive cultural quality in order to meet the need of social development and international communication.展开更多
文摘In this paper,some basic theories and terms of language testing,like types of language tests and qualities of good tests were briefly discussed.Then CET3(College English Test Band3) in Beijing was analyzed from three perspectives:design principles,item formats and test content. In the end,some suggestions were given to improve this test.
文摘Background:Subjective measures of auditory development are equally important as objective measures to obtain a realistic image of the hearing status in infants and toddlers.Objectives:The objectives of the current study were to translate and validate the LittleEARS questionnaire into the Hindi language,to calculate its psychometric properties and establish a regression curve of the scores obtained as a function of age,to calculate the inter-test and test retest reliability of the same.The secondary objectives were to compare the scores obtained by the normal hearing children and those with hearing impairment and to plot a regression curve of total scores obtained by the hearing-impaired children as a function of the duration of auditory training attended since their first fit of the device.Materials and methods:The procedures involved conventional translation,reverse translation,and content validation before administering the questionnaire.The translated version was administered to parents of 59 children with normal hearing and 41 children with hearing impairment.Results:The finalized version had good reliability and efficient internal consistency with a Cronbach alpha value of 0.96.The mean scores obtained by the normal hearing children showed a progressive pattern as a function of age.Conclusion:The LittleEARS questionnaire has been successfully translated and validated into the Hindi language with excellent validity and reliability and can be used for screening and early identification of hearing impairment and in evaluating the outcome of audiological treatment approaches.
文摘This paper outlines a framework to use computer and natural language techniques for various levels of learners to learn foreign languages in Computer-based Learning environment.We propose some ideas for using the computer as a practical tool for learning foreign language where the most of courseware is generated automatically.We then describe how to build Computer-based Learning tools,discuss its effectiveness,and conclude with some possibilities using on-line resources.
文摘In order to ensure the safety,quality and efficiency of computer numerical control(CNC)machine tool processing,a real-time monitoring and visible solution for CNC machine tools based on hyper text markup language(HTML)5 is proposed.The characteristics of the real-time monitoring technology of CNC machine tools under the traditional Client/Server(C/S)structure are compared and analyzed,and the technical drawbacks are proposed.Web real-time communication technology and browser drawing technology are deeply studied.A real-time monitoring and visible system for CNC machine tool data is developed based on Metro platform,combining WebSocket real-time communication technology and Canvas drawing technology.The system architecture is given,and the functions and implementation methods of the system are described in detail.The practical application results show that the WebSocket real-time communication technology can effectively reduce the bandwidth and network delay and save server resources.The numerical control machine data monitoring system can intuitively reflect the machine data,and the visible effect is good.It realizes timely monitoring of equipment alarms and prompts maintenance and management personnel.
文摘地点:中国旅行社驻外分社营业部Setting:China Travel Service,Overseas Branch人物:杰克·乔治、黄先生Characters:Jack George and Mr.Huang 会话 Dialogue黄先生:乔治先生,您决定了没有?Mr.Huang:Have you made up your mind,Mr.George?乔治:你叫我杰克好了。我决定从上海入境。
文摘Language stood in the foreground of George Orwell's social and political thinking. Language is not only a vehicle for transmitting ideas, but also a product originating from social and political interactions. This paper examines the language, particularly the abuse of language, in the context of politics presented in Nineteen Eighty-Four, so as to find out George Orwell's view of language: language as a manipulated tool to control people's minds.
基金Supported by National Natural Science Foundation of China(Grant No.51175305)
文摘In recent decades, many additives with different characteristics have been applied to strengthen and toughen Al2O3-based ceramic cutting tool materials. Among them, SiC whiskers and SiC nanoparticles showed excellent performance in improving the material properties. While no attempts have been made to add SiC whiskers and SiC nanoparticles together into the ceramic matrix and the synergistically toughening effects of them have not been studied. An Al2O3-SiCw-SiC np advanced ceramic cutting tool material is fabricated by adding both one-dimensional SiC whiskers and zero-dimensional SiC nanoparticles into the Al2O3 matrix with an effective dispersing and mixing process. The composites with 25 vol% SiC whiskers and 25 vol% SiC nanoparticles alone are also investegated for comparison purposes. Results show that the Al2O3-SiCw-SiCnp composite with both 20 vo1% SiC whiskers and 5 vol% SiC nanoparticles additives have much improved mechanical properties. The flexural strength of Al2O3-SiCw-SiCnp is 730＋ 95 MPa and fracture toughness is 5.6 ± 0.6 MPa.m1/2. The toughening and strengthening mechanisms of SiC whiskers and nanoparticles are studied when they are added either individually or in combination. It is indicated that when SiC whiskers and nanoparticles are added together, the grains are further refined and homogenized, so that the microstructure and fracture mode ratio is modified. The SiC nanoparticles are found helpful to enhance the toughening effects of the SiC whiskers. The proposed research helps to enrich the types of ceramic cutting tool and is benefit to expand the application range of ceramic cutting tool.
基金Supported by Program for New Century Excellent Talents in University of China(Grant No.NCET-13-0357)Shandong Provincial Natural Science Foundation of China(Grant No.ZR2014EEM026)Tai Shan Scholar Foundation of China
文摘C-276 nickel-based alloy is a difficult-to-cut material. In high-speed machining of Hastelloy C-276, notching is a prominent failure mode due to high mechanical properties of work piece, which results in the short tool life and low productivity. In this paper, a newly developed Ti（C7N3）-based cermet insert manufactured by a hot-pressing method is used to machine the C-276 nickel-based alloy, and its cutting performances are studied. Based on orthogonal experiment method, the influence of cutting parameters on tool life, material removal rates and surface roughness are investigated. Experimental research results indicate that the optimal cutting condition is a cutting speed of 50 m/min, depth of cut of 0.4 mm and feed rate of 0.15 mm/r if the tool life and material removal rates are considered comprehensively. In this case, the tool life is 32 min and material removal rates are 3000 mm^3/min, which is appropriate to the rough machining. If the tool life and surface roughness are considered, the better cutting condition is a cutting speed of 75 m/min, depth of cut of 0.6 mm and feed rate of 0.1 mm/r. In this case, the surface roughness is 0.59μm. Notch wear, flank wear, chipping at the tool nose, built-up edge（BUE） and micro-cracks are found when Ti（C7N3）-based cermet insert turned Hastelloy C-276. Oxidation, adhesive, abrasive and diffusion are the wear mechanisms, which can be investigated by the observations of scanning electron microscope and energy-dispersive spectroscopy. This research will help to guide studies on the evaluation of machining parameters to further advance the productivity of nickel based alloy Hastelloy C-276 machining.
文摘A two streams system seems to exist for tactile perception.We asked kindergarten children to identify(semantic)and describe the function of grasped unseen instruments of their daily life(fork,knife,spoon,brush,toothbrush,pencil,and scissor),and then,to simulate its use(pragmatic).The capacity to describe the function of the set of instruments was significantly superior to that of identifying them by name,although there was a significant direct association between identification and description of the function in the responses to the set of instruments.The simulation of the instrument function was of two types:(i)use―the child simulated how the instrument is grasped and used;and(ii)incorporation―the child simulated the function of the instrument with her/his own hand.The results support the hypothesis of a two streams tactile system(semantic and pragmatic),and that kindergarten children have the ability to incorporate functional properties of instruments of their daily life,probably as a support for language development.
文摘In the plurilingual and multicultural contemporary international setting,the educational systems opt for successfully meeting as well as adapting to the rapid social,economic,and technological changes.Based on the premise that intercultural communicative competence holds a significant potential for foreign language instruction,focus should throw into combining teachers’intercultural knowledge with pedagogy and technology.The prospect of introducing intercultural material within the context of teaching scenarios in the curricula of a technology-enhanced foreign language learning environment where the Technological Pedagogical Content Knowledge(TPACK)approach is implemented,can positively contribute to the teaching process.Under this perspective,cultural and digitally competent teachers can create a framework which will enable learners to fully develop their interactive and linguistic skills and to effectively communicate in a foreign language promoting its social and multicultural dimension whatever the intercultural context.
文摘Chinese college English Language Curriculum is a complicated teaching system combined with a variety of teaching modes and teaching methodologies. It is guided by foreign language teaching theories and takes the English language knowledge and application skills, cross-cultural communication and learning strategies as its main content. In addition, as the main basis of English education for non-English major undergraduates in colleges and universities, this curriculum helps to cultivate students' English comprehensive application ability, especially for their listening and speaking skills while improving their abilities of selfeducation. It can also strengthen learners' comprehensive cultural quality in order to meet the need of social development and international communication.
