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Structural and Operational Optimization of A Flapping Fin Used as A Self-Propulsor for AUV Propulsion

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China Ocean Engineering 2022年第1期36卷 86-99页

作者： fan Shuang-shuang CI Xiao-han neil BOSE CHENG Xiao School of Marine Sciences Sun Yat-sen UniversityZhuhai 519082China Southern Laboratory of Ocean Science and Engineering Zhuhai 519000China Department of Ocean and Naval Architectural Engineering Memorial University of NewfoundlandSt.John’sNL A1C 5S7Canada School of Geospatial Engineering and Science Sun Yat-sen UniversityZhuhai 519082China

Marine mammals could directly harvest energy from waves and obtain propulsive force through oscillating flapping fins or horizontal tail flukes,which in many cases have been observed and proved to be *** propulsion generated by the flapping fin has been analyzed by many researchers from both the theoretical and experimental prospects;however,the structural and operational optimization of a flapping fin for the optimal propulsion performance has been less studied,such as the investigation of the effects of the phase difference between heave and pitch motion,maximum oscillation angle,fin shape,oscillation centre of the fin and the operating sea state on the generated *** this paper,the flapping fin is used as a self-propulsor to propel an autonomous underwater vehicle(AUV)for propulsion *** the optimization design of the flapping fin,its propulsion effect is numerically investigated with different structural parameters and under various operation conditions using computational fluid dynamics(CFD)*** and validation study have been implemented to quantify the numerical uncertainties and evaluate the accuracy of the proposed CFD ***,a series of case studies are thoroughly conducted to investigate the effects of different structural parameters and operational conditions on the generated propulsion of a flapping fin by CFD *** simulation results demonstrate that different structural parameters and operation conditions would significantly impact the magnitude and distribution state of the fluid pressure around the flapping fin surface,thus,affect the propulsion performance of the *** findings in this study will provide guidelines for the structural and operational optimization design of a flapping fin for self-propulsion of mobile platforms.

关键词： autonomous underwater vehicle(AUV) flapping fin self-propulsion computational fluid dynamics(CFD) optimization design

青年理想信念教育常态化制度化的百年回顾与新时代推进理路

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思想理论教育 2021年第7期 47-53页

作者：项久雨范海群武汉大学马克思主义学院湖北武汉430072

青年理想信念教育是一项长期性、系统性、战略性工程,需回望历史,不忘来时路,总结和传承中国共产党推进青年理想信念教育的百年经验。新时代推进青年理想信念教育常态化制度化,更需立足现实,紧跟时代发展潮流,明晰常态化制度化的根本要... 详细信息

青年理想信念教育是一项长期性、系统性、战略性工程,需回望历史,不忘来时路,总结和传承中国共产党推进青年理想信念教育的百年经验。新时代推进青年理想信念教育常态化制度化,更需立足现实,紧跟时代发展潮流,明晰常态化制度化的根本要求与内在逻辑关系;坚持继承性与创造性相统一、理论教育与实践养成相统一、主导性与主体性相统一等基本原则,提升理想信念教育的规律性;构建协同育人机制、多重激励机制、科学评价机制等,形成青年理想信念教育常态化制度化的长效机制。

关键词：青年理想信念教育常态化制度化

CRISPR/Cas9-based functional characterization of Px ABCB1 reveals its roles in the resistance of Plutella xylostella(L.)to Cry1Ac,abamectin and emamectin benzoate

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农业科学学报:英文版 2023年第10期22卷 3090-3102页

作者： OUYANG Chun-zheng YE fan WU Qing-jun WANG Shao-li neil CRICKMORE ZHOU Xu-guo GUO Zhao-jiang ZHANG You-jun State Key Laboratory of Vegetable Biobreeding Deapartment of Plant ProtectionInstitute of Vegetables and FlowersChinese Academy of Agricultural SciencesBeijing 100081P.R.China Guangdong Laboratory for Lingnan Modern Agriculture Guangzhou 510642P.R.China School of Life Sciences University of SussexBrighton BN19QGUK Department of Entomology University of KentuckyLexingtonKY 40546-0091USA

The identification of functional midgut receptors for pesticidal proteins produced by Bacillus thuringiensis(Bt)is critical for deciphering the molecular mechanism of Bt resistance in *** expression of the PxABCB1 gene was previously found to be associated with Cry1Ac resistance in the diamondback moth,Plutella xylostella(L.).To directly validate the potential receptor role of PxABCB1 and its contribution to Bt Cry1Ac toxicity in ***,we used CRISPR/Cas9 to generate a homozygous knockout ABCB1KO strain with a 5-bp deletion in exon 3 of its *** ABCB1KO strain exhibited a 63-fold resistance to Cry1Ac toxin compared to the parental DBM1Ac-S ***,the ABCB1KO strain also exhibited significant increases in susceptibility to abamectin and emamectin *** changes in susceptibility to various other Bt Cry proteins or synthetic insecticides were *** knockout strain exhibited no significant fitness ***,our study indicates that PxABCB1 can protect the insect against avermectin insecticides on one hand,while on the other hand it facilitates the toxic effect of the Bt Cry1Ac *** results of this study will help to inform integrated pest management approaches against this destructive pest.

关键词： Bacillus thuringiensis Plutella xylostella CRISPR/Cas9 ABCB1 bioinsecticide resistance

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论中国共产党人的精神动力

重庆大学学报(社会科学版) 2022年第1期28卷 1-11页

作者：项久雨范海群武汉大学马克思主义学院

中国共产党的百年历史就是一部中国共产党人精神动力发展史。物质对精神、社会存在对社会意识的决定作用，精神对物质、社会意识对社会存在的能动反作用，共同推动社会历史的发展。中国共产党人充分重视精神力量对奋斗实践的推动作用，... 详细信息

中国共产党的百年历史就是一部中国共产党人精神动力发展史。物质对精神、社会存在对社会意识的决定作用，精神对物质、社会意识对社会存在的能动反作用，共同推动社会历史的发展。中国共产党人充分重视精神力量对奋斗实践的推动作用，是在坚持物质对精神、社会存在对社会意识的决定作用的前提下的精神主动，符合历史唯物主义基本观点。精神力量源于人们的知识、情感、意志、理想、信念、信仰等，这些精神因素在人的实践中所产生的“力”便构成了精神动力。精神动力的形成发展与作用发挥，源于客观的社会存在与主体的精神需要的双重要求，并通过主体的自觉能动性的发挥而将这种精神力量作用于实践，以达到合目的性与合规律性的统一。中国共产党人找准来时路、走好当下路、瞭望未来路的精神动力，是信仰动力、信念动力、信心动力的系统整合，是个体精神动力、群体精神动力、民族精神动力的多元融合，是精神创造力、精神凝聚力、精神约束力的有机统一。它对推进党和国家的各项事业和中国共产党人的自身成长起着方向指引、情感激励、意志砥砺和力量凝聚的重要作用。从精神动力的层次来看：马克思主义信仰奠定了中国共产党人的信仰基础，是共产党人的精神支柱和行动指南；对中国特色社会主义的坚定信念，规定了中国共产党人的道路选择，是共产党人的力量源泉；对实现中华民族伟大复兴中国梦的必胜信心彰显中国共产党人的乐观心态，指引着共产党人的奋斗方向。从形成精神动力的主体来看：精神动力是个体精神、群体精神、民族精神的作用彰显，个体精神动力是中国共产党人联系个体与国家、民族的精神纽带，群体精神动力彰显中国共产党人的群体认知、群体情感、群体意志，民族精神动力是中国共产党人血液里的民族精神基因蕴含的持久性、深层次的精神力量。从精神动力的作用来看：精神创造力贯穿中国共产党人创造性地反映和改造客观世界的过程，精神凝聚力汇聚起中国共产党人领导中国革命、建设和改革的磅礴伟力，精神约束力促使中国共产党人永葆先进性、纯洁性与革命性。

关键词：中国共产党人精神动力崇高信仰理想信念精神谱系

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Experts consensus on the procedure of dental operative microscope in endodontics and operative dentistry

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International Journal of Oral Science 2023年第3期15卷 371-376页

作者： Bin Liu Xuedong Zhou Lin Yue Benxiang Hou Qing Yu Bing fan Xi Wei Lihong Qiu Zhengwei Huang Wenwei Xia Zhe Sun Hanguo Wang Liuyan Meng Bin Peng Chen Zhang Shuli Deng Zhaojie Lu Deqin Yang Tiezhou Hou Qianzhou Jiang Xiaoli Xie Xuejun Liu Jiyao Li Zuhua Wang Haipeng Lyu Ming Xue jiuyu Ge Yi Du Jin Zhao Jingping Liang Department of Endodontics and Operative Dentistry Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineCollege of StomatologyShanghai Jiao Tong UniversityNational Center for StomatologyNational Clinical Research Center for Oral DiseasesShanghai Key Laboratory of StomatologyShanghai Research Institute of StomatologyShanghaiChina State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases&Department of Operative Dentistry and Endodontics West China Hospital of StomatologySichuan UniversityChengduChina Department of Cariology and Endodontology Peking University School and Hospital of Stomatology&National Center of Stomatology&National Clinical Research Center for Oral Diseases&National Engineering Laboratory for Digital and Material Technology of Stomatology&Beijing Key Laboratory of Digital Stomatology&Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health&NMPA Key Laboratory for Dental MaterialsBeijingChina Department of Endodontics and Operative Dentistry Beijing Stomatological HospitalCapital Medical UniversityBeijingChina Department of Operative Dentistry and Endodontics School of StomatologyThe Fourth Military Medical UniversityXi’anChina State Key Laboratory of Oral&Maxillofacial Reconstruction and Regeneration Key Laboratory of Oral Biomedicine Ministry of EducationHubei Key Laboratory of StomatologySchool&Hospital of StomatologyWuhan UniversityWuhanChina Department of Operative Dentistry and Endodontics Hospital of StomatologyGuanghua School of StomatologySun Yat-Sen University&Guangdong Provincial Key Laboratory of StomatologyGuangzhouChina Department of Endodontics School of StomatologyChina Medical UniversityShenyangChina Stomatology Hospital School of StomatologyZhejiang University School of MedicineZhejiang Provincial Clinical Research Center for Oral DiseasesKey Laboratory of Oral Biomedical Research of Zhejiang ProvinceCancer Center of Zheji

The dental operative microscope has been widely employed in the field of dentistry,particularly in endodontics and operative dentistry,resulting in significant advancements in the effectiveness of root canal therapy,endodontic surgery,and dental ***,the improper use of this microscope continues to be common in clinical settings,primarily due to operators’insufficient understanding and proficiency in both the features and established operating procedures of this *** October 2019,Professor Jingping Liang,Vice Chairman of the Society of Cariology and Endodontology,Chinese Stomatological Association,organized a consensus meeting with Chinese experts in endodontics and operative *** objective of this meeting was to establish a standard operation procedure for the dental operative ***,a consensus was reached and officially *** the span of about four years,the content of this consensus has been further developed and improved through practical experience.

关键词： operative surgery primarily

东盟区域一体化进程中国家之间的溢出效应研究——基于经济增长的视角

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广西大学学报（哲学社会科学版） 2022年第5期44卷 72-80页

作者：范祚军孟庆伟周久寓广西大学国际学院广西大学经济学院/中国—东盟金融合作学院

2015年以来东盟一体化取得巨大成就,但东盟十国之间依然存在巨大的发展差异,有效参与区域一体化已成为影响东盟国家经济增长的重要因素。区域一体化在增强中心国家对区域内其他国家溢出效应的同时,也可能产生抑制效应影响。东盟的区域... 详细信息

2015年以来东盟一体化取得巨大成就,但东盟十国之间依然存在巨大的发展差异,有效参与区域一体化已成为影响东盟国家经济增长的重要因素。区域一体化在增强中心国家对区域内其他国家溢出效应的同时,也可能产生抑制效应影响。东盟的区域一体化扩大了跨国投资对区域经济增长的溢出效应,尤其是扩大了劳动力市场、金融市场的溢出效应,但是对消费市场的提升尚不显著。因此,应当提高东盟自贸区的市场化程度,发挥“中心国家”的溢出作用,补足跨国消费市场短板,构建东盟合作安全网。

关键词：东盟集聚效应溢出效应空间杜宾面板区域一体化

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香港合同法之主要特徵及其未來發展方向

中国法律（中英文版） 2020年第5期 63-67,146-149页

作者： neil Andrews 揚帆英國劍橋大學國際爭議解決研究院(IDRA)

一、香港合同法的特色1按照《香港特別行政區基本法》第8條及第18條的規定,除與基本法相抵觸或經香港特別行政區的立法機關作出修改以外,香港合同法繼續保留原有的普通法、衡平法、條例、附屬立法和習慣法。香港合同法與英國合同法一樣... 详细信息

一、香港合同法的特色1按照《香港特別行政區基本法》第8條及第18條的規定,除與基本法相抵觸或經香港特別行政區的立法機關作出修改以外,香港合同法繼續保留原有的普通法、衡平法、條例、附屬立法和習慣法。香港合同法與英國合同法一樣,由不同的主題組成。這些主題構成了香港合同法的一般原則。許多學者指出,英國合同法的一般原則和理論架構約於十九世紀形成。

关键词：合同法衡平法基本法普通法立法香港

Plume-ridge interaction induced migration of the Hawaiian-Emperor seamounts

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Science Bulletin 2021年第16期66卷 1691-1697,M0004页

作者： Weidong Sun Charles H.Langmuir neil MRibe Lipeng Zhang Saijun Sun He Li Congying Li Weiming fan Paul J.Tackley Patrick Sanan Center of Deep Sea Research Center of Ocean Mega ScienceInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Mineral Resources Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China School of Marine Sciences University of the Chinese Academy of SciencesBeijing 100049China Department of Earth and Planetary Sciences Harvard UniversityCambridge MA 02138USA Universite Paris-Saclay CNRSLab FASTF-91405 OrsayFrance Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of SciencesBeijing 100101China Institute of Geophysics Department of Earth SciencesETH ZurichZurich CH-8092Switzerland

The history of the Hawaiian hotspot is of enduring interest in studies of plate motion and mantle flow,and has been investigated by many researchers using the detailed history of the Hawaiian-Emperor Seamount *** of the unexplained aspects of this history is the apparent offset of several Emperor seamounts from the Hawaii plume *** we show that the volcanic migration rates of the Emperor seamounts based on existing data are inconsistent with the drifting rate of the Pacific plate,and indicate northward and then southward “absolute movements”of the *** modeling suggests that attraction and capture of the upper part of the plume by a moving spreading ridge led to variation in the location of the plume’s magmatic output at the *** of the plume material towards the ridge led to apparent southward movement of ***,the upper part of the plume was carried northward until 65 Ma *** the ridge and the plume became sufficiently separated,magmatic output moved back to be centered over the plume *** changes are apparent in variations in the volume of seamounts along the plume *** and isotopic compositions of basalt from the Emperor Seamount chain changed from depleted(strong mid-ocean ridge affinity)in Meiji and Detroit to enriched(ocean island type),supporting declining influence from the *** its surface expression was modified by mantle flow and by plume-ridge interactions,the stem of the Hawaiian plume may have been essentially stationary during the Emperor period.

关键词： Pacific plate Emperor-Hawaii chain Plume-ridge interaction Geochemistry Numerical modeling

激光加热温度对冷喷Stellite 6合金沉积层表面特性的影响

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兵工学报 2012年第7期33卷 840-846页

作者：骆芳孔凡志威廉.欧尼尔姚建华柴国钟浙江工业大学之江学院浙江杭州310024 浙江工业大学机械工程学院浙江杭州310012 剑桥大学工程系制造研究院

激光辅助冷喷涂(LCS)工艺是一种新的涂层和制造工艺,它结合了冷喷涂的固态沉积、保持原有粉末成分、高沉积效率优势,能够沉积冷喷涂难以或不可能沉积的材料。以N2气作为高压载气,在中碳钢基体材料上采用LCS沉积Stellite 6粉末颗粒。采... 详细信息

激光辅助冷喷涂(LCS)工艺是一种新的涂层和制造工艺,它结合了冷喷涂的固态沉积、保持原有粉末成分、高沉积效率优势,能够沉积冷喷涂难以或不可能沉积的材料。以N2气作为高压载气,在中碳钢基体材料上采用LCS沉积Stellite 6粉末颗粒。采用金相、SEM以及EDX对沉积层进行表征,分析了激光加热的沉积点温度和N2温度对沉积层的表面形貌、沉积厚度和沉积密度的影响。结果表明:激光加热导致的沉积点温度越高,沉积表面起伏越大,颗粒撞击形成的凹陷越深,粉末沉积层越厚;沉积层的致密度与沉积点温度和N2温度有关。在氮气压力3 MPa,工件进给速度为15 mm/s的条件下,氮气温度450℃,沉积点温度1 100℃时,沉积层质量最好。

关键词：材料表面与界面中碳钢激光辅助冷喷 stellite 6 沉积层