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Ru thickness-dependent interlayer coupling and ultrahigh FMR frequency in FeCoB/Ru/FeCoB sandwich trilayers

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Chinese Physics B 2022年第8期31卷 552-560页

作者： Le Wang Zhao-Xuan Jing Ao-Ran Zhou shan-dong Li College of Physics Qingdao UniversityQingdao 266071China College of Electronics and Information Qingdao UniversityQingdao 266071China

The antiferromagnetic(AFM) interlayer coupling effective field in a ferromagnetic/non-magnetic/ferromagnetic(FM/NM/FM) sandwich structure, as a driving force, can dramatically enhance the ferromagnetic resonance(FMR) frequency. Changing the non-magnetic spacer thickness is an effective way to control the interlayer coupling type and intensity, as well as the FMR frequency. In this study, Fe Co B/Ru/Fe Co B sandwich trilayers with Ru thickness(tRu) ranging from 1 A to 16 A are prepared by a compositional gradient sputtering(CGS) method. It is revealed that a stress-induced anisotropy is present in the Fe Co B films due to the B composition gradient in the samples. A tRu-dependent oscillation of interlayer coupling from FM to AFM with two periods is observed. An AFM coupling occurs in a range of 2 A ≤ tRu≤ 8 A and over 16 A, while an FM coupling is present in a range of tRu< 2 A and 9 A ≤ tRu≤ 14.5 A. It is interesting that an ultrahigh optical mode(OM) FMR frequency in excess of 20 GHz is obtained in the sample with tRu= 2.5 A under an AFM coupling. The dynamic coupling mechanism in trilayers is simulated, and the corresponding coupling types at different values of tRuare verified by Layadi’s rigid model. This study provides a controllable way to prepare and investigate the ultrahigh FMR films.

关键词： interlayer exchange coupling optical mode resonance acoustic mode resonance component gradient sputtering

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肿瘤患者家庭肠内营养护理的最佳证据总结

肿瘤代谢与营养电子杂志 2024年第3期11卷 344-352页

作者：孙露露谌永毅董珊郭苗苗袁玲南京大学医学院附属鼓楼医院肿瘤科江苏南京210008 湖南省肿瘤医院护理部湖南长沙410013

目的检索、评价并总结国内外肿瘤患者家庭肠内营养护理的最佳证据,为实施家庭肠内营养护理提供参考依据。方法本研究对PubMed、BMJ Best Practice、Up To Date、The Cochrane Library、英国国家卫生与临床优化研究所(NICE)、加拿大安大... 详细信息

目的检索、评价并总结国内外肿瘤患者家庭肠内营养护理的最佳证据,为实施家庭肠内营养护理提供参考依据。方法本研究对PubMed、BMJ Best Practice、Up To Date、The Cochrane Library、英国国家卫生与临床优化研究所(NICE)、加拿大安大略注册护士联合会网站(RNAO)、医脉通临床指南网、中国知网、万方数据库、维普数据库等数据库进行系统检索,全面检索关于肿瘤患者家庭肠内营养护理的证据,基于“6S”证据金字塔模型选取临床决策、指南、系统评价/meta分析、证据总结、专家共识、随机对照试验等。检索时间范围从2013年12月1日至2023年12月1日。由具有循证医学背景的研究人员进行文献质量评价和资料提取。结果共纳入文献23篇,其中指南8篇,专家共识4篇,证据总结3篇,系统评价6篇,随机对照研究2篇。归纳出包括肿瘤患者家庭肠内营养护理的最佳照护团队、筛查与评定、实施与评价、营养教育4个方面22条最佳证据。结论本研究为肿瘤患者家庭肠内营养护理提供循证证据,从而提升肿瘤患者营养管理质量。

关键词：肿瘤患者家庭肠内营养证据总结护理

地震荷载下唐家山滑坡动力响应特征及破坏机理研究

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甘肃科学学报 2024年第4期36卷 1-8,25页

作者：侯玮华董杉张奇华彭宇林张恒中国地质大学(武汉)湖北巴东地质灾害国家野外科学观测研究站湖北武汉430074

为分析北川唐家山滑坡地震动力响应特征和变形破坏机理,通过振动台模型试验和FLAC 3D数值模拟开展研究。研究表明:地震作用下,中缓倾角顺层岩质边坡加速度响应表现出“高程效应”和“趋表效应”。地震波加载频率达20~30 Hz时,坡面各测... 详细信息

为分析北川唐家山滑坡地震动力响应特征和变形破坏机理,通过振动台模型试验和FLAC 3D数值模拟开展研究。研究表明:地震作用下,中缓倾角顺层岩质边坡加速度响应表现出“高程效应”和“趋表效应”。地震波加载频率达20~30 Hz时,坡面各测点加速度响应峰值和坡脚监测点加速度峰值的比值即PGA放大系数呈现显著递增趋势;加载不同振幅地震波,坡面各测点PGA放大系数均呈现递增趋势。坡体失稳表现出明显时间和空间上的差异性,具有多次滑动现象,出现层间错动的多个滑动面。地震作用下该类边坡的破坏模式主要为“拉裂-剪切-滑移”型,破坏过程主要分为层间结构面拉裂、松弛阶段,竖向拉裂缝形成阶段,结构面剪切阶段和整体滑移阶段。研究成果对进一步认识此类边坡动力稳定性影响规律具有一定参考意义,可为防灾减灾和抗震设计提供科学依据。

关键词：顺层岩质边坡振动台试验数值模拟动力响应特征变形破坏机理

Engineering high-performance dielectric chiral shells with enhanced chiral fields for sensitive chiral biosensor

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Rare Metals 2024年第3期43卷 1197-1206页

作者： Yi-Fan Wang shan-shan Huang Zhen-dong Dai Shi-Lin Xian Xuan-Nan Wu Fu-Hua Gao Yi-dong Hou College of Physics Sichuan UniversityChengdu610065China Graduate School of Sichuan University Sichuan UniversityChengdu610065China

Chiral metamaterials have been a topic of significant research interest in recent years due to their potential for various applications in nanophotonic devices and chiral ***,the intrinsic Ohmic loss in surface plasmonic resonance has limited their practical use,resulting in large light dissipation and weak chiroptical ***,we report on the development of high-performance dielectric chiral shells(DCS)through a two-step Si deposition process on a self-assembled microsphere *** form DCS sample completely oyercomes the cancelation effect originated from the disorder property of the micro-sphere monolayer in macroscale,and at a wavelength of approximately 710 nm,the measured optimal chiral signal(g-factor)and transmittance can reach up to 0.7 and 0.3,*** strong chiroptical effect comes from the asymmetric circular displacement currents(i.e.,magnetic modes)enabled by the specific shell *** chiral shell geometry,electromagnetic properties,sensor sensitivity of chiral molecules and figure of merit are systematically *** DCSs demonstrate highly sensitive detection of chiral biomolecules owing to their easily accessible geometry and enhanced uniform chiral field.

关键词： Dielectric chiral shells(DCS) Si deposition Magnetic resonance Highly sensitive sensor Chiral field

Enhanced Atom Search Optimization Based Optimal Control Parameter Tunning of PMSG for MPPT

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Energy Engineering 2022年第1期119卷 145-161页

作者： Xin He Ping Wei Xiaoyan Gong Xiangfei Meng dong shan Jiawei Zhu Yunnan Power Grid Co. Ltd.Education and Training Evaluation CenterKunming650041China Yunnan Power Grid Co. Ltd.Kunming650041China Yunan Dianzhong Huineng Intelligent Energy Co. Ltd.Kunming650041China Zhengzhou Wante Electric Co. Ltd.Zhengzhou450500China Chang’an University Xi’an710064China

For the past few years,wind energy is the most popular non-traditional resource among renewable energy resources and it’s significant to make full use of wind energy to realize a high level of generating ***,diverse maximum power point tracking(MPPT)methods have been designed for varying speed operation of wind energy conversion system(WECS)applications to obtain optimal power ***,a novel and metaheuristic technique,named enhanced atom search optimization(EASO),is designed for a permanent magnet synchronous generator(PMSG)based WECS,which can be employed to track the maximum power *** of the most promising benefits of this technique is powerful global search capability that leads to fast response and high-quality optimal ***,in contrast with other conventional meta-heuristic techniques,EASO is extremely not relying on the original solution,which can avoid sinking into a low-quality local maximum power point(LMPP)by realizing an appropriate trade-off between global exploration and local *** last,simulations employing two case studies through Matlab/Simulink validate the practicability and effectiveness of the proposed techniques for optimal proportional-integral-derivative(PID)control parameters tuning of PMSG based WECS under a variety of wind conditions.

关键词： Enhanced atom search optimization permanent magnetic synchronous generator maximum power point tracking wind energy conversion system

30 Years of Climate Change before and after the Impoundment of the Three Gorges Reservoir

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Journal of Earth Science 2023年第4期34卷 1315-1318页

作者： Junqi Liu Chen Lin shan dong Ruixue Feng Aijun Su Jinghui Cui Shupeng Yu Badong National Observation and Research Station of Geohazards China University of GeosciencesWuhan 430074China Three Gorges Research Center for Geo-hazards Ministry of EducationChina University of GeosciencesWuhan 430074China Wuhan Ecological Environment Design and Research Institute Co. LtdWuhan 430050China

The Three Gorges Project, also known as the Yangtze River Three Gorges Water Control Project, is located in Yichang, Hubei Province, China. The dam is one of the largest hydropower stations in the world, with an eleva... 详细信息

关键词： China. Yangtze Gorges

Catalyzed oxidation of 2,6-dimethylphenol in Triton X-100 micellar solution

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Chinese Chemical Letters 2007年第3期18卷 349-351页

作者： Jie Zhu Xiang Guang Meng Hai dong Wang shan dong Liu Qin Hui Pang Juan Du Xian Cheng Zeng College of Chemistry Sichuan University Chengdu 610064 China Bio-Chemistry Experimental Center Jiaxing College Jiaxing 314001 China College of Physics Science Qingdao University Qingdao 266071 China

The oxidative coupling reaction of 2,6-dimethylphenol with H202 catalyzed by a copper（H） Schiff complex in aqueous and Triton X-100 micellar solution under mild conditions was investigated. The kinetics of formation of 3,3＇,5,5＇-tetramethyl-4,4＇- diphenoquinone （DPQ） was studied. Rate constant k2 were obtained. The optimum pH for DPQ generation reaction is 7.25. The main product was DPQ in aqueous buffer solution, but PPE and the oxidized products of PPE remained in Triton X-100 micellar solution.

关键词： 2,6-Dimethylphenol Oxidative coupling Micelle Kinetics

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二三维一体化协同设计平台构建研究

建筑技术 2024年第18期55卷 2288-2291页

作者：丁东山吴忠华陈志谋卢皓中建科工集团有限公司广东深圳518000

为了解决设计标准落地困难、缺乏高效的多端协同体系、正向设计缺乏平台支撑、出图打印与数字签名缺乏有效管控等问题。结合设计人员实际需求,提出二三维设计共存并动态互通的协同工作模式,自主研发二三维一体化协同设计平台。通过协同... 详细信息

为了解决设计标准落地困难、缺乏高效的多端协同体系、正向设计缺乏平台支撑、出图打印与数字签名缺乏有效管控等问题。结合设计人员实际需求,提出二三维设计共存并动态互通的协同工作模式,自主研发二三维一体化协同设计平台。通过协同管理与数据抓取,实现设计流程可监控、设计过程可管理、设计成果可归档、设计知识沉淀可利用,充分提升设计效率和管理水平。

关键词：二三维一体化协同模式协同设计平台

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天然染料的提取及在扎染中的应用

上海染料 2024年第2期52卷 33-38页

作者：吴齐超单栋毛新军何杰汪明岳上虞金冠化工有限公司浙江绍兴312000 浙江龙盛染料化工有限公司浙江上虞312300

采用植物靛蓝作为染料,结合传统的扎染工艺,通过对染色过程中不同条件的控制和不同的扎染技法的实践,研究了植物靛蓝在扎染中的应用效果。采用测试配色仪对棉织物样品的K/S值进行测定,通过洗涤和摩擦的标准化方法,测定其色牢度。试验结... 详细信息

采用植物靛蓝作为染料,结合传统的扎染工艺,通过对染色过程中不同条件的控制和不同的扎染技法的实践,研究了植物靛蓝在扎染中的应用效果。采用测试配色仪对棉织物样品的K/S值进行测定,通过洗涤和摩擦的标准化方法,测定其色牢度。试验结果表明,植物靛蓝多次染色后的纺织品可达到较高的K/S值和色牢度,且扎染后的织物具有独特的纹理和色彩效果。这种染色方式不仅符合现代消费者对绿色环保的需求,而且能够传承和发扬传统工艺,展现其独特的文化价值。

关键词：植物靛蓝扎染 K/S值色牢度