Results 81 to 90 of about 20,916 (224)
ABSTRACT The inherent brittleness of hardmetals stems from the rigid covalent bond in the ceramic matrix and the sharp ceramic/metal interface, which restricts the nucleation and motion of dislocations. In this study, a novel strategy is proposed to activate significant dislocation behaviors in the WC matrix by employing a non‐equiatomic CoNiFeCr ...
Cheng Qian +9 more
wiley +1 more source
Design and Implementation of Wind Turbine Background Monitoring and Management Platform [PDF]
随着经济的不断发展,人类对传统的化石资源的开发速度越来越快,地球上的化石资源也越来越匮乏。要想保证能源的可持续利用,保证人们的资源消费需求。节约使用石化能源、开发利用新能源和可再生能源十分关键。而风力发电作为能源当中重要的电力行业,已成为全世界各个国家大力发展的重要新能源之一。 在中国,全国平均风功率密度为100W/m2,风能资源的总储量约为32.26亿kw,现行可供开发的资源共计约10亿kw,其中包含了2.53亿kw陆地风能和7.5亿kw近海风能。风的可利用区域分布广阔,装机数量多 ...
熊菲
core
From Clueless to Confident: How ChatGPT Transforms Academic Writing in Chinese as a Second Language
ABSTRACT Generative artificial intelligence (GenAI) has demonstrated its potential to enhance the quality of second‐language (L2) academic writing. This study used a qualitative approach comprising analysis of ChatGPT usage‐history screenshots, written assignments, and semi‐structured interview data on students’ use of GenAI in their L2 Chinese ...
Lanfang Sun +4 more
wiley +1 more source
大量分布式新能源并网所带来的高随机性和强波动性将引发配电网的暂态过电压行为,是分布式能源发展的痼疾之一。本研究总结了分布式新能源并网接入系统产生的暂态过电压问题,并总结了过电压抑制方法,分析了分布式新能源接入系统中暂态过电压机理,包括功率变化、不对称故障、工作频率和谐振等因素。在此基础上,总结了分布式抑制暂态过电压的方法,包括母线调节和逆变器控制等手段,并指出了抑制方法的优缺点,最后针对分布式新能源高渗透率化和大量负荷随机性接入角度进行了展望。本研究有助于更好地理解分布式新能源接入暂态过电压问题 ...
牛嘉琪
doaj
Overreliance on Orthographic Similarity in L2‐Japanese Conceptual Processing by L1‐Chinese Learners
ABSTRACT Orthographic and phonological similarities between first (L1) and second (L2) languages can facilitate L2 processing. Particularly, L1‐Chinese learners of L2‐Japanese can benefit from the shared morphosyllabic Chinese characters (Japanese kanji/Chinese hanzi) because of their similar orthographies.
Xuehan Zhao, Kexin Xiong, Sachiko Kiyama
wiley +1 more source
青岛蓝色经济区建设要将海洋资源的有效利用开发和陆地科技创新支撑、产业结构布局和生态环境建设有机地结合起来,形成陆海一体的创新域;依靠科技创新,改变靠资源高消耗、环境高污染来换取经济发展的模式,推进陆海产业转型和结构调整升级,加快发展先进制造业和现代服务业,构建现代海洋新兴产业体系,形成具有自主知识产权的核心竞争力 ...
隋映辉
core
ABSTRACT Public private partnership literature promotes hybrid implementation structures as a potential solution to deal with limited resources and high levels of implementation burden and complexity. Despite the growing relevance and promises of hybrid implementation structures, we lack systematic knowledge on what makes governments opt for the ...
Stefan Wittwer, Fritz Sager
wiley +1 more source
Study on the Transformation and Upgrading of Business Mode of Canadian Solar Inc. [PDF]
太阳能作为一种可再生能源,与风电、水电、生物质能等可再生能源相比,具有取之不尽、用之不竭、清洁无污染、无需运输、能量转换环节少等独特优势。在国家相关政策的引导下,全国范围内出现了光伏产业的投资热潮,光伏产品规模迅速扩张,出现了重复建设和产能过剩的风险。与此同时,在欧债危机、美国经济低迷、贸易壁垒逐步加大的整体环境下,对外依存度达90%以上的中国光伏企业不得不面对量价齐跌的局面,原有的单纯部件或主机供应商的商业模式已无法推进企业的可持续发展。 在这样的大背景下,本文以阿特斯公司的商业模式转型升级为研究内容,
沈惠芳
core

