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Theoretical prediction,simulation and test validation of ultimate turning radius for prepregs in variable angle placement
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作者 Xianzhao XIA Lei ZU +7 位作者 Guiming ZHANG Helin PAN Qian ZHANG Jianhui FU Qiaoguo WU Lichuan ZHOU Zhihai BI Honghao LIU 《Chinese Journal of Aeronautics》 2026年第1期570-583,共14页
The planar force model of prepreg,initially established based on the principle of minimum potential energy and the Rayleigh-Ritz method,was improved by considering the difference between the tensile and compressive mo... The planar force model of prepreg,initially established based on the principle of minimum potential energy and the Rayleigh-Ritz method,was improved by considering the difference between the tensile and compressive moduli in the direction of the prepreg fibers.Compressivetensile stress distribution coefficients were also established.Combined with tests on the effect of process parameters on interlayer tack,a theoretical prediction model for the turning radius related to process parameters was developed,and the impact of prepreg interlayer tack force on the minimum turning radius was analyzed.A finite element simulation model for prepreg curve placement was created to study the size and distribution patterns of folds generated during the prepreg turning process.A minimum turning radius test was conducted to establish evaluation criteria for surface defects in curve placement and verify the accuracy of the minimum turning radius prediction model.Based on this,a prediction method for the minimum turning radius of prepreg related to process parameters was established,providing constraints for the trajectory design of variable-stiffness placement composites. 展开更多
关键词 Automated fiber placement Prediction model Thermoset prepreg tow turning radius Wrinkle formation
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Home,Sweet Home:A young returnee is breathing new life into a Chinese village-and finding purpose
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作者 ANTONY HARDI 《ChinAfrica》 2026年第2期28-30,共3页
History has never been driven by comfort,nor shaped solely by inheritance.Its most significant turning points have emerged from those with youth,conviction and courage ingrained in them.Progress starts when young peop... History has never been driven by comfort,nor shaped solely by inheritance.Its most significant turning points have emerged from those with youth,conviction and courage ingrained in them.Progress starts when young people not only dream but also take action.Sometimes,the boldest move is not to run towards the glow of cities,but to turn back-to one’s soil,roots and forgotten home-and help it to flourish. 展开更多
关键词 new life city glow historical turning points action CONVICTION Chinese village youth courage
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3-Turns教学法在实践共同体促进深度学习中的应用 被引量:1
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作者 陈东毅 王武 +2 位作者 林建新 黄捷 陈建国 《实验室研究与探索》 CAS 北大核心 2024年第4期151-154,共4页
在电气工程专业实践教学过程中凝练出由Turn up、Turn away、Turn back等环节组成的3-Turns教学法。经过多轮的实践应用,3-Turns教学法在实践共同体中提供了一个兼具解释性与可操作性的教学样例。研究发现,3-Turns教学法对实践共同体促... 在电气工程专业实践教学过程中凝练出由Turn up、Turn away、Turn back等环节组成的3-Turns教学法。经过多轮的实践应用,3-Turns教学法在实践共同体中提供了一个兼具解释性与可操作性的教学样例。研究发现,3-Turns教学法对实践共同体促进工科生深度学习起到了提质增效的作用;3-Turns教学法为工程实践学习情境的强化设计提供了理论依据与经验支持。该研究验证了基于3-Turns教学法的实践共同体促进工科生深度学习的有效性,为助力工科人才培养质量的持续提升做出了积极的探索与实践。 展开更多
关键词 实践共同体 深度学习 3-turns教学法 实践教学
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Paradigm Shifts in Translation Studies: Focus on Linguistic, Cultural, Social and Psychological Turns
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作者 Hosni Mostafa El-daly 《Sino-US English Teaching》 2015年第5期369-386,共18页
Translation has been the subject of a variety of research and conflicts among theorists. This fact that gives Thomas Samuel Kuhn's paradigm theory is pertinent to the present study. Kuhn is an American philosopher of... Translation has been the subject of a variety of research and conflicts among theorists. This fact that gives Thomas Samuel Kuhn's paradigm theory is pertinent to the present study. Kuhn is an American philosopher of Science. In his book The Structure of Scientific Revolutions, he proposes his paradigm theory which plays a great role in the development of sociology and philosophy of Science. According to Kuhn (1970), paradigm originates from one or some famous people's achievements, and for these achievements to be considered as paradigms, two major characteristics must be met as will be clarified in this paper. This study is an attempt to outline the scope of the disciplines of Translation Studies (TS), to give some indication of the kind of work that has been done so far. It is an attempt to demonstrate that TS is a discipline in its own right. It is a vastly complex field with many far-reaching ramifications. This study discusses the relationships between the changing definitions of translation and the turns of translation studies. 展开更多
关键词 linguistic turn cultural turn social and psychological turn
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A CLEAR PICTURE OF CHINA——China International Publishing Group turns 70
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作者 Xu Hao Yuan Yanan 《China Report ASEAN》 2019年第11期30-31,共2页
China International Publishing Group(CIPG)served as one of the first windows for the outside world to get to know China.Its predecessor,the International News Division of the National Press Administration of the Centr... China International Publishing Group(CIPG)served as one of the first windows for the outside world to get to know China.Its predecessor,the International News Division of the National Press Administration of the Central Government,was founded the same day as the People’s Republic of China(PRC)on October 1,1949.Qiao Guanhua,who later became Minister of Foreign Affairs,first headed the division.New China’s foreign language publishing and distribution efforts began as quickly as anything else. 展开更多
关键词 turns OUTSIDE PUBLISHING
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CRADLE OF PATRIOTISM——Nankai University turns 100 with distinction
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作者 Yuan Yuan 《China Report ASEAN》 2019年第11期32-33,共2页
Located in the southern part of Tianjin,a municipality neighboring Beijing,Nankai University was founded in August 1919.Over the past 100 years,the university has been a mosaic of China’s history.At the time of its b... Located in the southern part of Tianjin,a municipality neighboring Beijing,Nankai University was founded in August 1919.Over the past 100 years,the university has been a mosaic of China’s history.At the time of its birth,China was struggling under the rule of warlords who were battling for dominance after the fall of the Qing Dynasty(1644-1911),the last imperial dynasty of the country,and was in a fragmented state.Zhang Boling and Yan Xiu,two patriotic educators from Tianjin,had learned about modern educational systems abroad and decided to establish a modern system in their hometown to practice the philosophy of Saving the Nation Through Education.They started with Nankai Middle School in 1912. 展开更多
关键词 Middle turns TIANJIN
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On preferred and dispreferred second turns in interaction
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作者 ZHANG Ping 《Sino-US English Teaching》 2007年第12期38-41,共4页
Conversation analysis (CA) is an integral part of the study of language in communication, in which preference organization is an important topic for pragmatic research. This paper makes a study of preferred and disp... Conversation analysis (CA) is an integral part of the study of language in communication, in which preference organization is an important topic for pragmatic research. This paper makes a study of preferred and dispreferred second turns in naturally occurring interactions to show structurally expected or unexpected responses from the second parts of the adjacent pairs. The study is based on the analysis of examples of people's actual conversations. It is concluded that in actual conversations, the speaker may make a preferred or dispreferred answer in either marked or unmarked form according to the speaker's intention and conversation circumstances. 展开更多
关键词 conversation analysis turn-TAKING adjacency pair preferred and dispreferred second turns
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Twists and Turns of the Post-1949 Years
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《Contemporary International Relations》 1999年第10期4-4,共1页
Success of the revolution represents but only the first step in a long march. ---Mao Zedong Mao Zedong’s announcement in 1949 that "the Chinese people have stoodup," ended the dark decades of domestic fragm... Success of the revolution represents but only the first step in a long march. ---Mao Zedong Mao Zedong’s announcement in 1949 that "the Chinese people have stoodup," ended the dark decades of domestic fragmentation and foreign subjugation, 展开更多
关键词 Twists and turns of the Post-1949 Years
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Predicting Βeta-Turns and Βeta-Turn Types Using a Novel Over-Sampling Approach
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作者 Lan Anh T. Nguyen Xuan Tho Dang +8 位作者 Tu Kien T. Le Thammakorn Saethang Vu Anh Tran Duc Luu Ngo Sergey Gavrilov Ngoc Giang Nguyen Mamoru Kubo Yoichi Yamada Kenji Satou 《Journal of Biomedical Science and Engineering》 2014年第11期927-940,共14页
β-turn is one of the most important reverse turns because of its role in protein folding. Many computational methods have been studied for predicting β-turns and β-turn types. However, due to the imbalanced dataset... β-turn is one of the most important reverse turns because of its role in protein folding. Many computational methods have been studied for predicting β-turns and β-turn types. However, due to the imbalanced dataset, the performance is still inadequate. In this study, we proposed a novel over-sampling technique FOST to deal with the class-imbalance problem. Experimental results on three standard benchmark datasets showed that our method is comparable with state-of-the-art methods. In addition, we applied our algorithm to five benchmark datasets from UCI Machine Learning Repository and achieved significant improvement in G-mean and Sensitivity. It means that our method is also effective for various imbalanced data other than β-turns and β-turn types. 展开更多
关键词 Beta-turns BETA-turn TYPES Class-Imbalance OVER-SAMPLING
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China's key energy production base turns to hydrogen in pursuit of green development
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《China Rare Earth Information》 2021年第2期5-5,共1页
The Ningdong Energy and Chemical Industry Base in northwest China's Ningxia Hui Autonomous Region,one of China's major energy production bases,is eyeing opportunities in hydrogen energy production.In contrast ... The Ningdong Energy and Chemical Industry Base in northwest China's Ningxia Hui Autonomous Region,one of China's major energy production bases,is eyeing opportunities in hydrogen energy production.In contrast to grey hydrogen,which is produced from natural gas,green hydrogen,which is made from water and renewable power,has been considered a more climate-friendly energy solution.Producing green hydrogen is critical for the mega coal-to-chemical industry base to move towards modem. 展开更多
关键词 PURSUIT turns BASE
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Domestic clothing market turns from decline to increase
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《China Textile》 2023年第3期39-39,共1页
From January to February,policies and measures to stabilize the economy were further effective,combined with factors such as the fading impact of the pandemic,and the resumption of production and business in China'... From January to February,policies and measures to stabilize the economy were further effective,combined with factors such as the fading impact of the pandemic,and the resumption of production and business in China's garment industry accelerated steadily.The domestic garment market changed from a decline to an increase,and the market vitality continued to recover.However,due to the weakening of international market demand,order transfer and other reasons,China's garment exports are from positive growth to a significant decline In general,with domestic sales recovering and exports declining,the growth rate of major indicators such as production,benefit and investment of the garment industry showed an obvious negative growth trend.There are still great pressures and challenges for the industry to maintain a stable recovery. 展开更多
关键词 MARKET turns MAINTAIN
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Characteristics of hypersonic inward turning detonation wave 被引量:2
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作者 Haochen XIONG Ruofan QIU +2 位作者 Tao ZHANG Hao YAN Yancheng YOU 《Chinese Journal of Aeronautics》 2025年第4期142-154,共13页
The selection of an appropriate basic detonation wave flow field is crucial for improving the performance and geometric design of standing detonation vehicles.This paper employs a detailed chemical reaction model and ... The selection of an appropriate basic detonation wave flow field is crucial for improving the performance and geometric design of standing detonation vehicles.This paper employs a detailed chemical reaction model and solves the unsteady axisymmetric Euler equation to study the characteristics of the Axisymmetric Inward Turning Curved Detonation Wave(AIT-CDW)flow field and the parameters affecting the stability of the wave system structure of AIT-CDW flow field.The numerical results demonstrate a radial compression effect in the AIT-CDW flow field.This effect causes the detonation wave to have a shorter initiation length than oblique detonation wave flow field and the detonation wave angle to gradually increase with the flow direction postdetonation.The AIT-CDW flow field is confined space,making it prone to normal detonation waves when the detonation wave reflects from the wall.This phenomenon is detrimental to the stability of the wave system structure in the flow field.It has been observed that increasing the center body radius and decreasing the fuel equivalent ratio can effectively reduce the height of the normal detonation wave or even eliminate it.Additionally,a well-designed generatrix shape of the center body can enhance airflow,reduce choked flow,and promote the stability of the wave structure in the flow field. 展开更多
关键词 Axisymmetric inward turning detonation wave Basic detonation flow field Radial compression effect Wave structures Detonation wave reflection
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Resettlement Project Turns Cityscape Patches to Landmarks
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作者 LI RUIJIE 《The Journal of Human Rights》 2008年第3期10-12,共3页
Lao Zhang was a retired construction worker in Hohhot, capital of north China's Inner Mongolian Autonomous Region. The old man had worked to build apartment buildings all his life but never expected, even in a dream,... Lao Zhang was a retired construction worker in Hohhot, capital of north China's Inner Mongolian Autonomous Region. The old man had worked to build apartment buildings all his life but never expected, even in a dream, to be able to set his home in one of them. 展开更多
关键词 PROJECT Resettlement Project turns Cityscape Patches to Landmarks ZHANG
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Electronic Paper Turns a Page(2)
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《数理天地(高中版)》 2005年第10期50-50,共1页
为提高我国高中学生阅读科普英语的能力和高考英语的应试能力,本刊高中版自2000年8月起,举办一年一届的《科普英语翻译竞赛》,本届起止时间是2005年7月至2006年6月,竞赛内容选编自美、英、加拿大等英语国家的书、刊、报,既有科学内容和... 为提高我国高中学生阅读科普英语的能力和高考英语的应试能力,本刊高中版自2000年8月起,举办一年一届的《科普英语翻译竞赛》,本届起止时间是2005年7月至2006年6月,竞赛内容选编自美、英、加拿大等英语国家的书、刊、报,既有科学内容和时代感,又适合(略高于)我国中学生的英语水平.竞赛办法:将右上角的参赛标志随译文寄到本刊编辑部,并注明姓名、学校、班级、邮编,下下一期公布获奖名单.(详情见本刊第1期) 展开更多
关键词 中学生阅读 科普英语 PAPER turns ELECTRONIC 高考英语 应试能力 英语水平
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AU Turns a Corner
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《ChinAfrica》 2013年第6期2-2,共1页
Any organization that makes it to its 50th anniversary must have been doing something right. The African Union (AU) reached this milestone in May and can look back on the past half century as one in which Africa bec... Any organization that makes it to its 50th anniversary must have been doing something right. The African Union (AU) reached this milestone in May and can look back on the past half century as one in which Africa became independent and experienced positive gains in political and economic cooperation across the continent. 展开更多
关键词 AU turns a Corner
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The Affective Turn and Semblance Art:An Interview with Professor Brian Massumi
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作者 Yang Ziyue Brian Massumi 《文艺理论研究》 北大核心 2025年第5期53-66,共14页
This interview presents an in-depth interview with Brian Massumi,a renowned contemporary cultural theorist.Professor Massumi builds upon the philosophical ideas of Whitehead,Deleuze,and others,focusing his research on... This interview presents an in-depth interview with Brian Massumi,a renowned contemporary cultural theorist.Professor Massumi builds upon the philosophical ideas of Whitehead,Deleuze,and others,focusing his research on embodied experience philosophy,art and media theory,and cultural political theory.His article“The Autonomy of Affect”is widely recognized as marking a major theoretical shift in contemporary humanities research—the affective turn.This interview explores the contemporary significance of Deleuzian thought,the theoretical core of the affective turn and its interplay with process philosophy,and the political potential of art as a field of practice for nonsensuous similarity.The interview also reflects critically on the current affective turn in the humanities,addresses related controversies,and envisions art's experimental role in political potentiality and collective becoming. 展开更多
关键词 Deleuze Studies affective turn semblance art nonsensuous similarity affective attunement
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Electronic Paper Turns a Page(1)
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《数理天地(高中版)》 2005年第9期50-,共1页
Reading and computer screens don’t go together very well.If you’ve ever tried to do lots of online research for a school
关键词 Electronic Paper turns a Page
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Electronic Paper Turns a Page(3)
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《数理天地(高中版)》 2005年第11期50-,共1页
E Ink's microcapsules are filled with a clear liquid that holds very small particles.Some particles are black.Some are white.All of the particles have an e- lectrical charge.To make a sheet of electronic paper, en... E Ink's microcapsules are filled with a clear liquid that holds very small particles.Some particles are black.Some are white.All of the particles have an e- lectrical charge.To make a sheet of electronic paper, engineers spread millions of the particle-filled micro- capsules onto a piece of plastic. 展开更多
关键词 Electronic Paper turns a Page
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Village Inspiration A CPPCC National Committee member turns the fortunes of an impoverished village around with determination and innovation
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作者 Li Xiaoyu 《ChinAfrica》 2018年第4期25-25,共1页
On entering the mountainous vii lage of Yanbo in southwest China's Guizhou Province. the first thing noticeable is the flat roads and rows of new houses with cars parked in front of them. Against the hillside behind ... On entering the mountainous vii lage of Yanbo in southwest China's Guizhou Province. the first thing noticeable is the flat roads and rows of new houses with cars parked in front of them. Against the hillside behind ihe houses are several bustling village run enterprises, including a distillery and poultry farms. 展开更多
关键词 In Village Inspiration A CPPCC National Committee member turns the fortunes of an impoverished village around with determination and innovation CPC
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TURNING BACK THE CLOCKS——Xizang Museum teams up with other museums to revive relics
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作者 Kang Caiqi 《China's Tibet》 2025年第1期33-35,共3页
Located in the southeast corner of Norbulingka Palace Park in Lhasa,the Xizang Museum stands out as a facility integrating contemporary technology,design and practices with the regional characteristics of Xizang Auton... Located in the southeast corner of Norbulingka Palace Park in Lhasa,the Xizang Museum stands out as a facility integrating contemporary technology,design and practices with the regional characteristics of Xizang Autonomous Region,southwest China.The museum houses over 520,000 cultural relics,including silk pieces,religious instruments,ancient books and documents,porcelain and jade articles,enamel vessels,and silverware,as well as Thangka paintings. 展开更多
关键词 RELIGIOUS silver turn
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