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Optimization of Laser Ablation Technology for PDPhSM Matrix Nanocomposite Thin Film by Artificial Neural Networks-particle Swarm Algorithm 被引量:3
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作者 唐普洪 宋仁国 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第2期188-193,共6页
A new thermal ring-opening polymerization technique for 1, 1, 3, 3-tetra-ph enyl-1, 3-disilacyclobutane (TPDC) based on the use of metal nanoparticles produced by pulsed laser ablation was investigated. This method ... A new thermal ring-opening polymerization technique for 1, 1, 3, 3-tetra-ph enyl-1, 3-disilacyclobutane (TPDC) based on the use of metal nanoparticles produced by pulsed laser ablation was investigated. This method facilitates the synthesis of polydiphenysilylenemethyle (PDPhSM) thin film, which is difficult to make by conventional methods because of its insolubility and high melting point. TPDC was first evaporated on silicon substrates and then exposed to metal nanoparticles deposition by pulsed laser ablation prior to heat treatment.The TPDC films with metal nanoparticles were heated in an electric furnace in air atmosphere to induce ring-opening polymerization of TPDC. The film thicknesses before and after polymerization were measured by a stylus profilometer. Since the polymerization process competes with re-evaporation of TPDC during the heating, the thickness ratio of the polymer to the monomer was defined as the polymerization efficiency, which depends greatly on the technology conditions. Therefore, a well trained radial base function neural network model was constructed to approach the complex nonlinear relationship. Moreover, a particle swarm algorithm was firstly introduced to search for an optimum technology directly from RBF neural network model. This ensures that the fabrication of thin film with appropriate properties using pulsed laser ablation requires no in-depth understanding of the entire behavior of the technology conditions. 展开更多
关键词 nanocomposite thin film pulsed laser deposition(PLD) artificial neural net- works(ANN) particle swarm optimization (PSO)
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A Brief Discussion on the Cultural Differences Reflected in the Translation between Chinese and English in the Film Works
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作者 徐翰扬 《海外英语》 2018年第6期177-178,共2页
With the increasingly frequent economic and political exchanges and close ties between countries in the world, the cul-tural carriers represented by film works have become an important form of communication between co... With the increasingly frequent economic and political exchanges and close ties between countries in the world, the cul-tural carriers represented by film works have become an important form of communication between countries. In this context, moreand more attention has been paid to the translation of film works, and practitioners in this field also want to bring more smooth anddeep viewing experience to other audiences. Starting from the difference between Chinese translation and English translation, thispaper explores the specific elements of cultural differences and the reasons for this phenomenon, hoping to contribute to a compre-hensive and in-depth exchange of world culture. 展开更多
关键词 film works Chinese and English translation cultural differences factor exploration
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On international distribution strategy of Chinese film & television works
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作者 ZHAO Jing WANG Xue-mei 《Ecological Economy》 2019年第4期306-312,共7页
Nowadays,with the rapid development of economy and technology,Chinese film&television industry has made great advancement,owning a prosperous domestic market and gaining a lot of profits.However,the overseas marke... Nowadays,with the rapid development of economy and technology,Chinese film&television industry has made great advancement,owning a prosperous domestic market and gaining a lot of profits.However,the overseas market of Chinese film&television works is still lagging behind.As the economic globalization has fastened the free trade in the world,its international distribution is important for it could represent Chinese cultural values and help to spread Chinese"soft power".Therefore,some strategies would be proposed in the essay,in order to solve the existing problems in the international distribution of Chinese film&television works,such as box-office deficits,cultural discounts and trade barriers,etc. 展开更多
关键词 Chinese film&television works INTERNATIONAL DISTRIBUTION STRATEGY
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Investigation of working pressure on the surface roughness controlling technology of glow discharge polymer films based on the diagnosed plasma 被引量:1
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作者 Ling ZHANG Guo CHEN +5 位作者 Zhibing HE Xing AI Jinglin HUANG Lei LIU Yongjian TANG Xiaoshan HE 《Plasma Science and Technology》 SCIE EI CAS CSCD 2017年第7期110-117,共8页
The effects of working pressure on the component, surface morphology, surface roughness, and deposition rate of glow discharge polymer (GDP) films by a trans-2-butene/hydrogen gas mixture were investigated based on ... The effects of working pressure on the component, surface morphology, surface roughness, and deposition rate of glow discharge polymer (GDP) films by a trans-2-butene/hydrogen gas mixture were investigated based on plasma characteristics diagnosis. The composition and ion energy distributions of a multi-carbon (CaHs/H2) plasma mixture at different working pressures were diagnosed by an energy-resolved mass spectrometer (MS) during the GDP film deposition process. The Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscope (SEM) and white-fight interferometer (WLI) results were obtained to investigate the structure, morphology and roughness characterization of the deposited films, respectively. It was found that the degree of ionization of the C4H8/H2 plasma reduces with an increase in the working pressure. At a low working pressure, the C-H fragments exhibited small-mass and high ion energy in plasma. In this case, the film had a low CH3/CH2 ratio, and displayed a smooth surface without any holes, cracks or asperities. While the working pressure increased to 15 Pa, the largest number of large-mass fragments led to the deposition rate reaching a maximum of 2.11 #m h-1, and to hole defects on the film surface. However, continuing to increase the working pressure, the film surface became smooth again, and the interface between clusters became inconspicuous without etching pits. 展开更多
关键词 glow discharge polymer films plasma diagnosis working pressure SURFACEMORPHOLOGY surface roughness
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THE BAND STRUCTURE AND WORK FUNCTION OF TRANSPARENT CONDUCTING ALUMINUM AND MANGANESE CO-DOPED ZINC OXIDE FILMS
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作者 H.T.Cao Z.L.Pei +3 位作者 X.B.Zhang J.Gong C.Sun L.S.Wen 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2005年第3期356-362,共7页
Al and Mn co-doped-ZnO films have been prepared at room temperature by DC reacti ve magnetron sputtering technique. The optical absorption coefficient, apparent and fundamental band gap, and work function of the films... Al and Mn co-doped-ZnO films have been prepared at room temperature by DC reacti ve magnetron sputtering technique. The optical absorption coefficient, apparent and fundamental band gap, and work function of the films have been investigated using optical spectroscopy, band structure analyses and ultraviolet photoelectro n spectroscopy (UPS). ZnO films have direct allowed transition band structure, w hich has been confirmed by the character of the optical absorption coefficient. The apparent band gap has been found directly proportional to N2/3, showing that the effect of Burstein-Moss shift on the band gap variations dominates over the many-body effect. With only standard cleaning protocols, the work function of ZnO: (Al, Mn) and ZnO: Al films have been measured to be 4.26 and 4.21eV, respec tively. The incorporation of Mn element into the matrix of ZnO, as a relatively deep donor, can remove some electrons from the conduction band and deplete the d ensity of occupied states at the Fermi energy, which causes a loss in measured p hotoemission intensity and an increase in the surface work function. Based on th e band gap and work function results, the energy band diagram of the ZnO: (Al, M n) film near its surface is also given. 展开更多
关键词 transparent conducting oxide film band gap UPS work function
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Increased work function in PEDOT:PSS film under ultraviolet irradiation
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作者 邢英杰 钱旻昉 +1 位作者 郭等柱 张耿民 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第3期630-635,共6页
An increase of work function (0.3 eV) is achieved by irradiating poly(3,4-ethylenedioxythiophene):poly(styrene sul- fonate) (PEDOT:PSS) film in vacuum with 254-nm ultraviolet (UV) light. The mechanism for ... An increase of work function (0.3 eV) is achieved by irradiating poly(3,4-ethylenedioxythiophene):poly(styrene sul- fonate) (PEDOT:PSS) film in vacuum with 254-nm ultraviolet (UV) light. The mechanism for such an improvement is investigated by photoelectron yield spectroscopy, X-ray photo electron energy spectrum, and field emission technique. Sur- face oxidation and composition change are found as the reasons for work function increase. The UV-treated PEDOT:PSS film is used as the hole injection layer in a hole-only device. Hole injection is improved by UV-treated PEDOT:PSS film without baring the enlargement of film resistance. Our result demonstrates that UV treatment is more suitable for modifying the injection barrier than UV ozone exposure. 展开更多
关键词 poly(3 4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) film work function ul- traviolet hole injection layer
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Review of My Research Work on Ferroelectric Films and Si-Based Device Applications: Opportunity and Challenge
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作者 ZHU Wei-guang (Microelectronics Center, School of Electrical & Electronic Engineering, Nanyang Technological University,Singapore 639798) 《四川大学学报(自然科学版)》 CAS CSCD 北大核心 2005年第S1期9-,共1页
Ferroelectric materials have many interesting physical properties such as ferroelectricity, pyroelectricity, piezoelectricity, and opto-electricity, and applying ferroelectric materials in the forms of thin and thick ... Ferroelectric materials have many interesting physical properties such as ferroelectricity, pyroelectricity, piezoelectricity, and opto-electricity, and applying ferroelectric materials in the forms of thin and thick films and integrating them on the silicon substrate as electronic and MEMS devices is a very attractive research area and challenging. In this paper, we report our research works on ferroelectric MEMS and ferroelectric films for electronic device applications. Pyroelectric thin film infrared sensors have been made, characterized, and a 32×32 array with its size of 1cm×1cm has been obtained on Si membrane. Ferroelectric thin films in amorphous phase have been applied to make silicon based hydrogen gas sensors with the metal/amorphous ferroelectric film/metal device structure, and its turn-on voltage of about 4.5V at ~1000 ppm in air is about 7 times of the best value reported in the literature. For the application of electron emission flat panel display, ferroelectric BST thin films with excess Ti concentrations have been coated on Si tips, the threshold voltage of those ferroelectric film coated tips has been reduced about one order from ~70 V/μm to 4~10 V/μm for different Ti concentrations, and however, the electron emission current density has been increased at least 3~4 order for those coated tips compared to that of the bare Si tips. To fulfill in the thickness gap between thin film of typical ~1 μm made by PVD/CVD and polished ceramic wafer of ~50 μm from the bulk, piezoelectric films with thickness in a range of 1~30 μm have been successfully deposited on Si substrate at a low temperature of 650oC by a novel hybridized deposition technique, and piezoelectric MEMS ultrasonic arrays have been very recently obtained with the sound pressure level up to ~120 dB. More detailed results will be presented and mechanisms will be discussed. 展开更多
关键词 work Opportunity and Challenge Review of My Research work on Ferroelectric films and Si-Based Device Applications SI
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"Beyond the Dreams of Loveliness" --Film, Unionism, and Working Class Community Formation in Detroit, 1933-1939
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作者 Ryan Pettengill 《History Research》 2013年第4期223-238,共16页
Ever since Lawrence Goodwyn published The Populist Moment, social historians have been keenly aware of the power culture represents when it comes to resistance. Historically, "movement culture" has been used to crea... Ever since Lawrence Goodwyn published The Populist Moment, social historians have been keenly aware of the power culture represents when it comes to resistance. Historically, "movement culture" has been used to create a collective climate and offered political activists a springboard to discuss with the masses the benefits of joining a social movement. "Beyond the Dreams of Loveliness" uses the cultural outlet of film and the labor movement in the city of Detroit as analytical tools to examine working class community resistance throughout the 1930s. In the midst of the "golden age of film" community activists and union organizers--some of whom were well-known radicals and some of whom were mainstream unionists--used the institution of cinema to instill a level of class consciousness in the masses and mobilize the working class community against exploitation of employers, reactionary politicians, and white supremacist organizations. Movie-going had been a very popular form of recreation in Detroit since the 1920s and downtown theatres increasingly became the destination of an eclectic array of workers. Movie theaters themselves were bastions of community activity around the thirties and many were located in the heart of the city's working class district. Yet it was the films themselves that offered community activists and unionists a chance to converse with workers regarding the socio-economic matters of the day. Hollywood released a good number of films that dealt with working class issues and provided activists with ample opportunities to "instruct" the audience and carry on the discussion into the factory or union halls. "Beyond the Dreams of Loveliness" relies on a combination of oral histories, movie reviews, film clips, and union and/or working class organizational records to illuminate how activists in Detroit's working class community used film as an outlet to inspire working class resistance. In sum, film provided an accessible form of entertainment that proved to be effective on two fronts: It promoted increased group cooperation, friendship, and alliances while it also fostered a shared culture, making it easier for activists to organize workers in the coming struggles for unionism. 展开更多
关键词 film history DETROIT unionism labor and working class history United Automobile workers (UAW) Black Legion working class community community organizing/organizer
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An Empirical Study of Applying English Films and TV Programs to English-Listening Teaching
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作者 ZHANG Zhen 《Sino-US English Teaching》 2013年第4期306-327,共22页
This is a study of the feasibility and effects of teaching listening with films and TV programs. The research is a part of the English Learning Program directed by ZHANG Zhen, which is sponsored by Academic Affairs Of... This is a study of the feasibility and effects of teaching listening with films and TV programs. The research is a part of the English Learning Program directed by ZHANG Zhen, which is sponsored by Academic Affairs Office of Leshan Normal University. The researcher of the program sought for theretical bases from Krashen's Input Hypothesis, the Motivation Theory, the Context Theory, and the Communicative Language Teaching Theory. Then the author introduced a pilot study conducted by utilizing films or TV programs to teach listening from September 2010 till now. The statistic results from the experiment suggest that there is indeed some correlations between teaching listening with films or TV programs and a learner's listening comprehension in general in language achievement tests at certain stages. The scores of the students from the experimental group are improved after two years of teaching with the new methods. Analyses and discussions have been done based on a questionnaire and an interview. The results showed that both the teachers and the students had positive attitudes towards teaching listening with films or TV programs. Most of them view this method as an effective way in ELT (English language teaching), because it provides more opportunities for contextual practice, lower their anxiety; it can also help to motivate them, stimulate their active participation and increase their activities as well. Therefore, this method can be used to cultivate students' communicative competence. Consequently, we can draw the conclusion that this method has some advantages over teaching listening with the pre-taped materials in New College English. It may play an important role in ELT, especially in listening teaching. Based on the statistic analyses and the survey, some activities and techniques are provided for the teacher on how to teach listening with films or TV programs. The roles that an English teacher plays in this method are illustrated at the end of the thesis. 展开更多
关键词 foreign language acquisition films/tv programs teaching English listening
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The Impact of English Films and TV Series on Non-English College Students’Intercultural Competence
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作者 ZHOU Qin LI Jing 《Journal of Literature and Art Studies》 2021年第6期412-417,共6页
Based on the related theories of intercultural competence and extensive analysis of literature,this paper employed questionnaires and interviews to do a research with 200 non-English college students about the general... Based on the related theories of intercultural competence and extensive analysis of literature,this paper employed questionnaires and interviews to do a research with 200 non-English college students about the general situation of their intercultural competence and the impact on it caused by English films and TV series in Wuhan University of Technology.The findings of the study indicate that non-English college students have relatively good intercultural competence while the deficiency of intercultural knowledge and skill exists;the appreciation of English films and TV series is positively correlated with the four dimensions of non-English college students’intercultural competence,namely intercultural knowledge,attitude,skill and awareness.Based on these findings of the research,the author brings up some specific and constructive suggestions on improving non-English college students’intercultural competence with the help of English films and TV series for college English teachers and non-English college students. 展开更多
关键词 intercultural competence English films and tv series IMPACT Non-English college students
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交集与汇通:电影工业美学的“工作伦理”兼与其他学派关系的思考 被引量:2
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作者 陈旭光 蒋佳音 《民族艺术研究》 CSSCI 2024年第1期50-58,共9页
电影工业美学主张电影从业者秉持踏实勤恳、理性自制的职业精神,在电影制作的复杂流程中,各司其职、尽职尽责、高效配合,使电影实现品质和效益的最大化。这种“工作伦理”精神体现在电影的内部/外部层面。在内部层面主张制作表达大同性... 电影工业美学主张电影从业者秉持踏实勤恳、理性自制的职业精神,在电影制作的复杂流程中,各司其职、尽职尽责、高效配合,使电影实现品质和效益的最大化。这种“工作伦理”精神体现在电影的内部/外部层面。在内部层面主张制作表达大同性、常人化伦理观的电影作品,并与电影伦理学共同关注中国电影对伦理底线的恪守;但电影工业美学倡导对伦理表达方式的宽容。在外部层面,电影工业美学主张电影的大众文化品性,即对新老受众群体——“常人”所赏之美给予尊重。其“工作伦理”精神则与电影共同体美学在电影系统的和谐高效方面追求一致,但主张避免过度注重整体共情,造成电影审美上的单一。电影工业美学的“工作伦理”旨在通过维护电影制作过程的伦理和谐,提升电影的品质,促进电影传递正向伦理,丰富其伦理品格。电影工业美学与电影伦理学和电影共同体美学交集汇通、“互文”互见,既提升了中国电影的伦理品格和人学高度,也是对“中国电影学派”学术体系、话语体系、学科体系建构务实的有效实践。 展开更多
关键词 电影工业美学 “工作伦理” 伦理 电影伦理学 电影共同体美学
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中国式现代化建设中影视剧的传播实践与集体应答
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作者 贾毅 《中州学刊》 CSSCI 北大核心 2024年第10期170-176,共7页
近年的影视作品深入参与中国式现代化发展,对其进行了立体的阐释、宣传和推动。一大批优秀的影视剧集体行动,从国家站位和叙事到百姓视角和交流,从发现问题、正视问题到解决问题、激励引导,肩负起了对中国式现代化的“特别报道”“深度... 近年的影视作品深入参与中国式现代化发展,对其进行了立体的阐释、宣传和推动。一大批优秀的影视剧集体行动,从国家站位和叙事到百姓视角和交流,从发现问题、正视问题到解决问题、激励引导,肩负起了对中国式现代化的“特别报道”“深度报道”“系列报道”“对外报道”。这些优秀作品实现了对中国式现代化五大特征的全覆盖传播,并具有整体—局部—个体的空间层次、历史—当下—未来的时间层次、你—我—他共同奋斗的主体层次。但现有作品在对外传播、传播领域、传播系统等方面仍存在不足,需要在新质生产力发展理念下积极改善。 展开更多
关键词 中国式现代化 影视剧传播 高质量作品 议程设置
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古装影视作品服装设计环节皮革材料的创意表达研究
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作者 赵洁 《皮革与化工》 CAS 2024年第4期40-44,共5页
影视行业对服装的需求量极大,是未来我国皮革服装产业的重要市场之一。文章以古装影视作品为例,对皮革材料在古装影视作品服装设计环节的应用现状及存在问题进行总结,认为目前的皮革材料在应用于古装影视作品服装设计时存在粗制滥造、... 影视行业对服装的需求量极大,是未来我国皮革服装产业的重要市场之一。文章以古装影视作品为例,对皮革材料在古装影视作品服装设计环节的应用现状及存在问题进行总结,认为目前的皮革材料在应用于古装影视作品服装设计时存在粗制滥造、主题偏离、缺乏创新等问题,对皮革材料在古装影视作品服装设计环节的创意表达思路进行分析,旨在为皮革产业开拓影视行业市场提供帮助。 展开更多
关键词 古装影视作品 影视服装 皮革材料 创意表达
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影视服装语言的特点与功能
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作者 郑艳阳 《印染》 CAS 北大核心 2024年第7期100-103,108,共5页
影视服装作为一种视觉语言,具备鲜明的象征性、审美性与流行性,在叙事中扮演着至关重要的角色,不仅是角色外在形象的呈现,更蕴含着丰富的文化内涵和深层的象征意义,对情节发展、人物塑造以及主题表达都有着不可忽视的作用。介绍了影视... 影视服装作为一种视觉语言,具备鲜明的象征性、审美性与流行性,在叙事中扮演着至关重要的角色,不仅是角色外在形象的呈现,更蕴含着丰富的文化内涵和深层的象征意义,对情节发展、人物塑造以及主题表达都有着不可忽视的作用。介绍了影视服装语言的特征,分析了影视服装语言的功能性,及其功能与价值的实现路径。为充分发挥服装语言在影视作品中的作用,要根据人物形象进行服装设计,并基于剧情借助服装进行铺垫设计,突出人物的情绪变化,与剧情、人物、场景等元素相互交织,共同构建起影片的叙事空间,促进影视作品中的人物塑造、氛围渲染与主题表达。 展开更多
关键词 影视作品 服装语言 剧情推进 人物塑造
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虚拟现实视角下数字三维(3D)场景中镜头语言的应用探究
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作者 王家骐 许佳 +1 位作者 肖应祺 耿明萌 《科技创新与应用》 2024年第24期173-176,共4页
随着虚拟现实技术的发展,应用VR技术制作的各种影视作品也越来越多和越来越逼真,也更能够最大真实程度表达出作者意图和适应用户的需求。为了努力达到上述目标,该文通过对比虚拟现实影视作品场景中镜头语言与传统电影镜头语言,探究虚拟... 随着虚拟现实技术的发展,应用VR技术制作的各种影视作品也越来越多和越来越逼真,也更能够最大真实程度表达出作者意图和适应用户的需求。为了努力达到上述目标,该文通过对比虚拟现实影视作品场景中镜头语言与传统电影镜头语言,探究虚拟现实影视作品场景镜头语言的应用新优势,阐述景域、镜头运动、色彩及听觉等镜头语言元素在用户的心理、视觉以及情感等方面应用优劣势,并运用这些理论知识指导实际的工程项目。 展开更多
关键词 虚拟现实 景域 影视作品 镜头语言 镜头语言元素
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体育影视对高校体育教学的美育功能研究
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作者 张奇 《当代体育科技》 2024年第3期156-161,共6页
《“十四五”体育发展规划》对体育文化创作给予了大力支持,体育影视作品作为传播体育文化的重要载体,对体育精神的弘扬、体育美育功能的发挥具有积极意义。体育影视的美育功能在高校体育教学实践中长期缺乏教育者与关注度,当今影视作... 《“十四五”体育发展规划》对体育文化创作给予了大力支持,体育影视作品作为传播体育文化的重要载体,对体育精神的弘扬、体育美育功能的发挥具有积极意义。体育影视的美育功能在高校体育教学实践中长期缺乏教育者与关注度,当今影视作品传播途径随着信息化的普及变得多样,体育影视也逐步在教学中得到应用。研究体育影视对高校体育教学的美育功能,不仅是对当前体育美育教育实施途径的探寻与反思,还是对体育美育体系的建构和美育理论的提升。该文对体育影视作品及高校美育概况进行分析,探索高校体育影视美育教学措施及目标,旨在让学生更好地支持并参与到体育事业的发展中,弘扬新时代中华体育文化与精神。 展开更多
关键词 体育影视 体育教学 审美 美育
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名著改编电影在高校文学教学中的运用研究
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作者 谭笑晗 《吉林省教育学院学报》 2024年第2期81-86,共6页
当前的高校文学类课程教学在从传统到现代演进的过程中呈现出一系列问题,名著改编电影介入高校文学教学是其中较为有效的解决途径和方法,具有重要作用和意义。合理并有针对性地筛选影片、观影和文学文本细读相结合、以学生为中心的电影... 当前的高校文学类课程教学在从传统到现代演进的过程中呈现出一系列问题,名著改编电影介入高校文学教学是其中较为有效的解决途径和方法,具有重要作用和意义。合理并有针对性地筛选影片、观影和文学文本细读相结合、以学生为中心的电影介入是改进文学教学的有效策略。同时也要注意电影对原著的忠实性、电影放映时间和课上教学时间所占课堂教学比例、电影教学中的美学教育等多个问题。 展开更多
关键词 名著改编 电影 高校文学教学 文本细读
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一种新型振弦式土压力盒的结构设计分析
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作者 栾兆群 白鹏 王海永 《现代制造技术与装备》 2024年第5期45-47,共3页
在我国,岩土工程领域十分广阔,工程的应力检测、监测显得尤为重要。检测岩土基础的应力变化所用的土压力盒、土压力计种类繁多,有些土压力盒原理相同但结构多样,还有些土压力盒标定方法与实际应用完全不符。基于此,提出一种能够符合现... 在我国,岩土工程领域十分广阔,工程的应力检测、监测显得尤为重要。检测岩土基础的应力变化所用的土压力盒、土压力计种类繁多,有些土压力盒原理相同但结构多样,还有些土压力盒标定方法与实际应用完全不符。基于此,提出一种能够符合现场埋设应用的振弦式土压力盒。该设计是轮辐式工作膜在无盒状态下只接受压力传递片的压力和校准方法。 展开更多
关键词 振弦式土压力盒 轮辐式工作膜 结构设计
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黏温黏压下径向柱塞泵滑靴副温度分布与泄漏量分析
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作者 李少年 张子骞 +1 位作者 陈世豪 杨龙涛 《机电工程》 CAS 北大核心 2024年第10期1903-1913,共11页
针对高压大排量径向柱塞泵滑靴副摩擦失效和泄漏问题,以XDP1000型径向柱塞泵为例,对滑靴副温度分布与泄漏量进行了流场仿真和数值计算。首先,根据滑靴柱塞组件运动学特性分析,求解了滑靴偏转角变化规律,并通过建立滑靴副不同通道流量计... 针对高压大排量径向柱塞泵滑靴副摩擦失效和泄漏问题,以XDP1000型径向柱塞泵为例,对滑靴副温度分布与泄漏量进行了流场仿真和数值计算。首先,根据滑靴柱塞组件运动学特性分析,求解了滑靴偏转角变化规律,并通过建立滑靴副不同通道流量计算公式的方式,建立了滑靴副静压支承特性方程;然后,建立了滑靴副泄漏功率损失和摩擦功率损失模型,求解了滑靴副最佳油膜厚度,并分析了最佳油膜厚度的变化规律;最后,在考虑了油液黏温黏压特性的基础上,通过流场数值计算的方式,研究了滑靴副温度分布与泄漏量随径向柱塞泵工况参数的变化规律。研究结果表明:额定工况下,滑靴副最佳油膜厚度值约为14μm,滑靴副最佳油膜厚度值随着转子转角的增大而增大,随着工作压力和温度的增大而减小;滑靴运动方向侧油膜温度较另一侧高13 K,滑靴副温度值基本不受工作压力的影响,而随着转速的增大而升高;滑靴副阻尼孔泄漏量较滑靴边界泄漏量大0.02 kg/s,而且泄漏量随着压力、转速和油液温度的增大而增大。该研究结论可为高压大排量径向柱塞泵滑靴副设计及优化提供参考。 展开更多
关键词 高压大排量径向柱塞泵 静压支承特性 最佳油膜厚度 流体域温度分布 油液黏温黏压特性 工作压力 转子转速 流场仿真和数值计算
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土司书写的影视表达:隐喻、渐进与地方知识——以羌族电影《红色土司》为例
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作者 夏懿 《阿坝师范学院学报》 2024年第1期24-30,共7页
土司制度是中国历史上地方治理的方式之一。近年兴起的关涉土司的文学书写和影视表达,引发了历史研究和跨学科探讨。在土司影视的成长过程中,2019年上映的《红色土司》成为反映羌族革命英雄主义的里程碑。本文从该片的背景介绍出发,重... 土司制度是中国历史上地方治理的方式之一。近年兴起的关涉土司的文学书写和影视表达,引发了历史研究和跨学科探讨。在土司影视的成长过程中,2019年上映的《红色土司》成为反映羌族革命英雄主义的里程碑。本文从该片的背景介绍出发,重点分析影片中的隐喻意涵、线性叙事的渐进手法以及地方知识的嵌入。余论展望土司影视艺术,期待土司影视系统化的规制和发展;相关史料需要进一步做艺术和情感方面的处理,使历史时代的具体经验为今所用、于今有利。 展开更多
关键词 《红色土司》 影视表达 隐喻 线性叙事 地方知识
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