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Principle and Experimental Verification of Flexible Caudal Fin Based on Active Torsion Propulsion Mode

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Transactions of Nanjing University of Aeronautics and Astronautics 2016年第5期33卷 595-601页

作者： Guan Yuanlin li huafeng Yang Xixin Di Sisi School of Mechanical Engineering Qingdao University of Technology Qingdao 266100 P.R. China State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics Nanjing 210016 P.R. China School of Data Science and Software Engineering Qingdao University Qingdao 266100 P.R. China

The active torsion propulsion mode of a caudal fin,composed of macro fiber composites(MFC)and carbon fiber orthotropic composite material is *** caudal fin is excited by the piezoelectric structure to vibrate *** work principle is firstly analyzed by finite element method(FEM)and *** the caudal fin is optimized to increase the torque and improve the streamline,and the added mass effect from the water is discussed in terms of the frequency of the *** torsion resonance frequency is around 103 Hz in the air and decreased by 75%to 25 Hz in the ***,the mean thrust is discussed and measured to be 11 mN at900V(Peak to peak)driving voltage.A flexible micro robot is developed and *** locomotion velocity and flow velocity is 320mm/s and 268mm/s,*** results of the simulation and experiments indicate that the locomotion of the biomimetic aquatic robot has fast movement characteristics.

关键词： macro fiber composite torsion vibration mode local travelling wave micro robot

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球形纳米碳酸钙制备方法的研究进展

化工技术与开发 2024年第7期53卷 39-42,92页

作者：卢秋影覃沛卓民权李华锋欧盈君全志成龚福忠李仁才朱勇广西新晶科技有限公司广西南宁530007 广西化工研究院有限公司广西南宁530001 广西大学化学化工学院广西南宁530004 广西华纳新材料股份有限公司广西南宁530103

作为一种特定形貌的碳酸钙产品,球形碳酸钙(CaCO_(3))具有比表面积大、密度小、分散性和平滑性良好等特点,在涂料、造纸、胶黏剂、塑料、油墨、化妆品、药物缓控释等领域均得到广泛应用,球形CaCO_(3)的制备方法成为国内外的研究重点,受... 详细信息

作为一种特定形貌的碳酸钙产品,球形碳酸钙(CaCO_(3))具有比表面积大、密度小、分散性和平滑性良好等特点,在涂料、造纸、胶黏剂、塑料、油墨、化妆品、药物缓控释等领域均得到广泛应用,球形CaCO_(3)的制备方法成为国内外的研究重点,受到越来越多的关注。本文介绍了近年来球形纳米CaCO_(3)的制备方法及研究进展,旨在为工业制备球形纳米CaCO_(3)提供参考。

关键词：球形CaCO3 制备方法碳化法复分解法微乳法模板法

温通刮痧联合针灸治疗寒湿型腰椎间盘突出症的临床疗效观察

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广州医科大学学报 2024年第2期52卷 41-45页

作者：黄晓倩曾柳苑李华锋何青秋段苏平朱建妹石玲利广州医科大学附属第二医院中医科广东广州510260

目的:观察温通刮痧联合针灸治疗寒湿型腰椎间盘突出症的临床疗效。方法:选取我院中医科2022年5月至2023年5月148例寒湿型腰椎间盘突出患者为研究对象,使用随机数表法划分为两组,每组74例。对照组给予常规治疗,观察组在常规治疗基础上加... 详细信息

目的:观察温通刮痧联合针灸治疗寒湿型腰椎间盘突出症的临床疗效。方法:选取我院中医科2022年5月至2023年5月148例寒湿型腰椎间盘突出患者为研究对象,使用随机数表法划分为两组,每组74例。对照组给予常规治疗,观察组在常规治疗基础上加予温通刮痧联合针灸治疗,治疗7 d。在治疗前及治疗后7 d分别采用日本骨科协会腰椎JOA评分、视觉模拟评分法(VAS)评分、Kolcaba舒适状况量表(GCQ)评分比较临床治疗效果,测量患者TGFβ1、TNFα、IL1β等炎症指标。结果:治疗后两组JOA得分提高(P<0.05),且观察组增长更为显著(P<0.05);治疗后观察组VAS评分明显下降、GCQ评分明显升高(P<0.05);临床疗效总有效率、显效效率,观察组均高于对照组(P<0.05)。治疗后,观察组TGFβ1、TNFα、IL1β水平均低于对照组(P<0.05)。结论:针对寒湿型腰椎间盘突出症,使用温通刮痧联合针灸治疗可以有效缓解症状,提高舒适状况及临床疗效。

关键词：温通刮痧针灸寒湿型腰椎间盘突出症

Multi-functional metasurface:ultra-wideband/multi-band absorption switching by adjusting guided-mode resonance and local surface plasmon resonance effects

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Communications in Theoretical Physics 2024年第6期76卷 174-184页

作者： Wenxin li Shubo Cheng huafeng Zhang Zao Yi Bin Tang Can Ma Pinghui Wu Qingdong Zeng Rizwan Raza School of Physics and Optoelectronic Engineering Yangtze UniversityJingzhouHubei 434023China Joint Laboratory for Extreme Conditions Matter Properties Southwest University of Science and TechnologyMianyang 621010China School of Chemistry and Chemical Engineering Jishou UniversityJishou 416000China School of Microelectronics and Control Engineering Changzhou UniversityChangzhou 213164China Department of Oncology Sichuan Science City HospitalMianyangSichuan Province 621000China Office of Science and Technology Quanzhou Normal UniversityQuanzhou 362000China School of Physics and Electronic-information Engineering Hubei Engineering UniversityXiaogan 432000China Department of Physics COMSATS Institute of Information Technology 54000 LahorePakistan

This study introduces an innovative dual-tunable absorption film with the capability to switch between ultra-wideband and narrowband *** manipulating the temperature,the film can achieve multi-band absorption within the 30-45 THz range or ultra-wideband absorption spanning 30-130 THz,with an absorption rate exceeding ***,the structural parameters of the absorption film are optimized using the particle swarm optimization(PSO)algorithm to ensure the optimal absorption *** absorption response of the film is primarily attributed to the coupling of guided-mode resonance and local surface plasmon resonance *** film's symmetric structure enables polarization incoherence and allows for tuning through various means such as doping/voltage,temperature and structural *** the case of a multi-band absorption response,the film exhibits good sensitivity to refractive index changes in multiple absorption ***,the absorption spectrum of the film remains effective even at large incidence angles,making it highly promising for applications in fields such as biosensing and infrared stealth.

关键词： PSO optimization ultra-wideband/narrowband absorption switching intelligent absorption film vanadium dioxide

氧化钙改性三聚磷酸铝在光固化防腐蚀涂料中的应用研究

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化工技术与开发 2024年第4期53卷 29-32页

作者：吴良徐祥麟孔攀红卢秋影程博朱青松宋伟强李华锋广西新晶科技有限公司广西南宁530001 双塔涂料科技有限公司河南开封475000 河南泰和汇金粉体科技有限公司河南焦作454000 河南工业大学河南郑州450001

本文将环氧树脂和丙烯酸酯树脂作为成膜树脂,依次采用紫外光固化和热固化工艺,将氧化钙改性的三聚磷酸铝作为防腐蚀颜料,在马口铁板表面制作了防腐蚀涂层。研究发现,改性三聚磷酸铝用量为15%时,涂层的物理性能有明显降低。Tafel极化法... 详细信息

本文将环氧树脂和丙烯酸酯树脂作为成膜树脂,依次采用紫外光固化和热固化工艺,将氧化钙改性的三聚磷酸铝作为防腐蚀颜料,在马口铁板表面制作了防腐蚀涂层。研究发现,改性三聚磷酸铝用量为15%时,涂层的物理性能有明显降低。Tafel极化法进一步证明,涂料的防腐蚀性能随着改性三聚磷酸铝用量的增加而提高。用超景深显微镜可观察到,改性后的颜料仍然维持三聚磷酸铝的片状形态。DSC热分析结果表明,采用先紫外光固化再热固化的工艺是合适的。

关键词：光固化防腐蚀三聚磷酸铝

Fault-tolerant silicone dielectric elastomers

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International Journal of Smart and Nano Materials 2010年第1期1卷 40-52页

作者： Wei Yuan huafeng li Paul Brochu Xiaofan Niu Qibing Pei Department of Materials Science and Engineering The Henry Samueli School of Engineering and Applied Science and California Nanosystems InstituteUniversity of CaliforniaLos AngelesCA 90095-1595USA

Soft silicone films have garnered a great deal of interest for use in dielectric elastomer transducers due to their excellent properties,including high elongation to rupture,low viscoelasticity,and broad application temperature ***,silicone films generally have higher stiffness and lower dielectric strength than VHB acrylic elastomers,which limits the achievable actuation *** based on silicone dielectric elastomers always experience high rates of premature dielectric failure when operated at high *** premature failure is characterized by the loss of functionality or mechanical rupture of the material when operated below the material’s dielectric strength and elongation to *** use is reported of ultrathin coatings of single-walled carbon nanotubes(SWNTs)as the compliant electrodes,which can overcome the issue of premature *** self-clearing of the SWNT electrodes in the event of localized dielectric breakdown improves the apparent dielectric strength of the material by isolating the regions of reduced dielectric *** actuators may be operated at higher than 50%area strain with reasonably long *** strains were measured between-40 and 80℃and in a broad frequency range up to 100 *** fault tolerance introduced by the SWNT electrodes should broaden the application scope of silicone dielectric elastomers.

关键词： silicone elastomer fault tolerance single-walled carbon nanotube dielectric elastomer

Association of therapeutic occasion, gross motor function grading and developmental level with gross motor functional recovery in children with cerebral palsy

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Neural Regeneration Research 2007年第9期2卷 548-551页

作者： Hongying li huafeng Yu lin Sang Haixia Ma Rehabifitation Center Qilu Children＇s Hospital of Shandong University Ji＇nan 250022 Shandong Province China

BACKGROUND： The abnormal posture and motor pattern have not stabilized in children with cerebral palsy at early period, thus timely treatment can establish normal postural reflex and motor pattern, and prevent complications of muscle contracture, ankylosis, skeletal deformity, etc. The clinical factors affecting the rehabilitative efficacy of gross motor function in children with cerebral palsy should be observed. OBJECTIVE： To observe the effects of therapeutic occasion, grading of gross motor function and developmental level on the rehabilitative efficacy in children with cerebral palsy. DESIGN： A case-controlled analysis. SETTING： Qilu Children＇s Hospital of Shandong University. PARTICIPANTS： Totally 138 children with cerebral palsy, who were hospitalized for 12 months in the Rehabilitation Center of Qilu Children＇s Hospital, Shandong University, were selected from April 2004 to September 2006, and all the children were diagnosed to be accorded with the standard set by the national seminar on cerebral palsy in 2004. There were 97 males and 41 females, including 55 cases of 0-2 years old, 47 cases of 2-4 years and 36 cases of 4-6 years. Informed contents were obtained from relatives of all the children. METHODS： ① Comprehensive rehabilitation treatment： Vojta method was to induce the children to turn over the body and crawl by stimulating reflective turn over and crawling on belly. Bobath method including trainings of head control, turning over body, keeping sitting position, keeping balance, crawling, keeping standing position, and walking, etc.; The children were massaged by using the maneuvers of push, press, rub, pull, wave, etc. according to the sites and types of palsy. Acupuncture was performed mainly at bilateral motor areas, the needle was retained for 1 hour per time, 6 days continuously every week, and followed by a 1-day interval. ② Prognosis assessment： The gross motor functional grading of the children with cerebral palsy at admission was asses

关键词： cerebral palsy age started to accept treatment developmental level rehabilitation

Impact of clinical types and involved sites on the recovery of gross motor function after interventions in children with cerebral palsy

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Neural Regeneration Research 2006年第6期1卷 563-565页

作者： Hongying li huafeng Yu Yan Huang lin Sang Haixia Ma Rehabilitation Center of Qilu Children＇s Hospital Shandong University Jinan 250022 Shandong Province China

BACKGROUND： The recovery of gross motor function is the basis for the improvement of other abilities. It is helpful for judging the rehabilitative effect and prognosis of children with cerebral palsy to analyze the effect of different clinical types on the gross motor ability. OBJECTIVE ： To investigate the influence of different clinical types and different involved sites of limbs of cere- bral palsy on the effect of rehabilitative interventions on gross motor function. DESIGN ： A controlled observation before and after treatment SETTING： Rehabilitation Center of Qilu Children＇s Hospital, Shandong University PARTICIPANTS： Totally 138 children with cerebral palsy having complete data, who were hospitalized for 12 months in the Rehabilitation Center of Qilu Children＇s Hospital, Shandong University, were selected from Apnl 2004 to September 2006, including 97 males and 41 females; 55 cases were younger than 2 years old, 47 cases younger than 4 years and 36 cases younger than 6 years; 76 cases of spasm type, 30 cases of involuntary movement and 32 cases of mixed type （mixture of spasm and involuntary movement）; 64 cases of diplegia, 46 cases of tetraplegia and 28 cases of hemiplegia. All the children and their relatives were informed and agreed to cooperate with the expenments.METHODS： All the 138 children with cerebral palsy were given comprehensive rehabilitative treatment： The assessment of comprehensive ability was conducted to all the children with cerebral palsy by the rehabilitative group before rehabilitation treatment, the rehabilitative objective was established according to the results of the assessment, then feasible rehabilitative training plan was made up. The comprehensive rehabilitative treatment was conducted as planned afterwards：（1） Physical therapy： The Bobath method was used, and motor development was promoted by proprioceptive hand technique. （2） Traditional Chinese medicine therapy： Massage： The children were massaged by using the maneu

关键词： cerebral palsy rehabilitative treatment motor function rehabilitation treatment analysis of variance acupuncture therapy function recovery Chinese medicine complete data Bobath method

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双频激光光源技术研究现状与进展

工具技术 2022年第3期56卷 3-8页

作者：杜含笑李华丰中国航空工业北京长城计量测试技术研究所北京市100095

双频激光的波长稳定性及频差大小直接影响激光干涉仪的测量精度及测量速度,因此高性能双频光源对激光干涉仪的测量至关重要。介绍了近20年双频激光技术的最新进展,比较了实现双频输出的不同方案,如塞曼分裂、双折射及声光调制等,简明阐... 详细信息

双频激光的波长稳定性及频差大小直接影响激光干涉仪的测量精度及测量速度,因此高性能双频光源对激光干涉仪的测量至关重要。介绍了近20年双频激光技术的最新进展,比较了实现双频输出的不同方案,如塞曼分裂、双折射及声光调制等,简明阐述了不同双频激光器的原理、特点及应用场合,对其光学分离方式、频差大小、安装难度及结构成本等特性进行比较,为双频激光干涉仪光源研究提供参考。

关键词：双频激光器塞曼效应双折射激光器双纵模激光器