检索结果-南通市图书馆

Robust interface and excellent as-built mechanical properties of Ti–6Al–4V fabricated through laser-aided additive manufacturing with powder and wire

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 154-168页

作者： Fei Weng Guijun Bi Youxiang Chew Shang Sui Chaolin Tan Zhenglin du Jinlong Su Fern Lan ng Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong Engineering&Technology Research Center for Superhard MaterialSchool of Materials Science and EngineeringShandong UniversityJinan 250061China Institute of Intelligent Manufacturing Guangdong Academy of SciencesGuangzhou 510095China Singapore Institute of Manufacturing Technology 5 Cleantech Loop636732Singapore

The feasibility of manufacturing Ti-6Al-4V samples through a combination of laser-aided additive manufacturing with powder(LAAM_(p))and wire(LAAM_(w))was explored.A process study was first conducted to successfully circumvent defects in Ti-6Al-4V deposits for LAAM_(p) and LAAM_(w),*** the optimized process parameters,robust interfaces were achieved between powder/wire deposits and the forged substrate,as well as between powder and wire *** characterization results revealed the epitaxial prior β grains in the deposited Ti-6Al-4V,wherein the powder deposit was dominated by a finerα′microstructure and the wire deposit was characterized by lamellar α *** mechanisms of microstructure formation and correlation with mechanical behavior were analyzed and *** mechanical properties of the interfacial samples can meet the requirements of the relevant Aerospace Material Specifications(AMS 6932)even without post heat *** fracture occurred within the interfacial area,further suggesting the robust *** find.ngs of this study highlighted the feasibility of combining LAAM_(p) and LAAM_(w) in the direct manufacturing of Ti-6Al-4V parts in accordance with the required dimensional resolution and deposition rate,together with sound strength and ductility balance in the as-built condition.

关键词： laser-aided additive manufacturing powder deposition wire deposition interfacial characteristic mechanical behavior

在线全文

学校读者我要写书评

暂无评论

法律行为汉字术语的日本翻译与中国传播史

法学研究 2025年第1期47卷 95-117页

作者：吴奇琦澳门大学法学院中国澳门澳门大学人文社科高等研究院中国澳门

“法律行为”一词乃日本明治时期法学家所创造。根据立法会议记录,日本德式新民法草案最初采用的术语是“法律上的行为”,后来才改采“法律行为”。“行为”一译,是沿用了日本法式旧民法中“acte”的译法。然而,起草委员们未注意到德国... 详细信息

“法律行为”一词乃日本明治时期法学家所创造。根据立法会议记录,日本德式新民法草案最初采用的术语是“法律上的行为”,后来才改采“法律行为”。“行为”一译,是沿用了日本法式旧民法中“acte”的译法。然而,起草委员们未注意到德国学说上“Rechtsgeschaft”与“Rechtshandlung”之分,故“Rechtsgeschaft”“Rechtshandlung”“acte juridique”曾被当时日本文献视作同义。因立法后术语难再改动,起草委员们只能以学说之名,将“法律行为”分为广狭二义,广义者指“Rechtshandlung”,狭义者指“Rechtsgeschaft”,而“acte juridique”可作广狭二用,至于“法律上的行为”,则专指“Rechtshandlung”。因“行为”同被用于“Geschaft”“Handlung”甚至“Akt”等,使汉字术语相当混乱。这一混乱随着清末留日学生翻译的日本著作与讲义传入我国。译本的不理想,使我国错失改译的良机。本文发现了两部从未被引用的文献:1917年,余棨昌对“法律行为”译语提出了批评,这一发现可将学界认知前推90年;1977年,刘世民首次提出改译方案,主张将“法律行为”改译为“法律事务”。虽然21世纪又出现了各家改译方案,但将“Rechtsgeschaft”与“Rechtshandlung”分别译为“法律行为”与“法律上的行为”仍是主流。

关键词：法律行为法律上的行为法律事务准法律行为事实行为

Calibration of the Solar X-ray detector on-board the Macao Science Satellite-1B for Soft X-ray detection

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2025年第1期68卷 11-26页

作者： Man-Hei ng Xiaoping ZHAng Jianwu CHEN Yongqiang SHI Fuchang ZUO Wenxi PEng Weichun FU Liansheng LI Pengwei LUO Chi-Long TAng Guozheng ZHAng Zhiwu MEI Li WAng Cunhui LI Jiaming OU Yanyan Xu State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao999078China Space Optoelectronic Measurement and Perception Laboratory Beijing Institute of Control EngineeringBeijing100190China Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China Science and Technology on Vacuum Technology and Physics Laboratory Lanzhou Institute of PhysicsLanzhou730000China China National Space Administration(CNSA) Macao Center for Space Exploration and ScienceMacao999078China

The Solar X-ray detector(SXd)on-board the Macao Science Satellite-1B(MSS-1B)was successfully launched via the Chinese Long March-2C rocket on 21 May 2023,and commenced operations in early June of the same *** MSS-1B/Soft X-ray detection Units(SXdUs)employ two silicon drift detectors(Sdds),provid.ng a wide range of energy spectra spanning from 0.7 to 24 ***,the SXdUs deliver a high-resolution capability of 0.14 keV@5.9 keV and operate with a time cadence of 1 ***,we perform thorough calibrations of the MSS-1B/SXdUs,employing a combination of ground experiments and *** addition,quantitative analysis comparing the flux measurements obtained by the MSS-1B/SXdUs to the data collected by the Geostationary Operational Environmental Satellite(GOES),provides compelling evidence of their ***,the preliminary spectral analysis results showcase the robustness and expected performance of the MSS-1B/SXdUs,unlocking their potential for facilitating the study of dynamic evolution of solar ***,the innovative MSS-1B/Solar X-ray detector facilitates concurrent observations of solar soft and hard X-rays,thereby making valuable contributions to the advancements in solar research.

关键词： Macao Science Satellite-1B(MSS-1B) Calibration Solar X-Ray detector Spectrometer Soft X-rays Solar flares Solar abundances

在线全文

学校读者我要写书评

暂无评论

林中的魔法城堡维尔纽斯幼儿园

室内设计与装修 2025年第3期 88-91页

作者： ng architects ng architects

该项目坐落在占地44hm2的Uoguslenis综合开发区内。这座私立幼儿园以其创新的早教理念和与自然环境的深度融合，成为一座令人瞩目的教育建筑。幼儿园毗邻茂密的波罗的海森林，里面长满了桦树和松树，建筑深色的外立面与周围郁郁葱葱的...

该项目坐落在占地44hm2的Uoguslenis综合开发区内。这座私立幼儿园以其创新的早教理念和与自然环境的深度融合，成为一座令人瞩目的教育建筑。幼儿园毗邻茂密的波罗的海森林，里面长满了桦树和松树，建筑深色的外立面与周围郁郁葱葱的绿色背景形成鲜明对比，在凸显建筑大胆设计风格的同时，也实现了室内外空间与自然世界的有机联结。

关键词：

Etiology,diagnosis, management and outcomes of epiphora referrals to an oculoplastic practice

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2016年第12期9卷 1751-1755页

作者： Guang-Lin Shen John d.ng Xiao-Ping Ma department of Ophthalmology Zhongshan Hospital of Fudan University Casey Eye Institute Oregon Health and Science University

AIM： To investigate the etiology, diagnosis, management and outcome of epiphora referrals to an oculoplastic ***： Retrospective chart review of patients referred for epiphora to an oculoplastic clinic between 2005 and 2009. Patient demographics, past history, ophthalmic examination, treatment and outcome were ***： There were 237 subjects with a primary complaint of epiphora. They included 130 （55%） females and 107 （45%） males with an average age of 55.9±25.9y. The most common cause of epiphora was lacrimal obstruction （46%）; followed by multifactorial epiphora （22%）, reflex tearing （22%） and eyelid malposition （11%）. differences in prevalence of etiology were noted in terms of age and gender distribution. Of the 182 （77%） patients who returned for follow up, 41 （23%） reported a complete resolution and 102 （56%） reported a significant improvement in their ***： Epiphora is a common condition with many causes. A thorough history and examination are required to provide the appropriate treatment tailored to the underlying cause.

关键词： epiphora etiology lacrimal disease dry eye

A comprehensive framework for the delimitation of species within the Bemisia tabaci cryptic complex,a global pest-species group

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Insect Science 2025年第1期32卷 321-342页

作者： Hua-Ling Wang Teng Lei Xiao-Wei Wang Stephen Cameron Jesús Navas-Castillo Yin-Quan Liu M.N.Maruthi Christopher A.Omongo Hélène delatte Kyeong-Yeoll Lee Renate Krause-Sakate James ng Susan Seal Elvira Fiallo-Olivé Kathryn Bushley John Colvin Shu-Sheng Liu College of Forestry Hebei Agricultural UniversityBaodingHebei ProvinceChina The Ministry of Agriculture Key Laboratory of Molec ular Biology of Crop Pathogens and Insects Institute of Insect SciencesZhejiang UniversityHangzhouChina Natural Resources Institute University of GreenwichKentUK College of Life Sciences Taizhou UniversityTaizhouZhejiang ProvinceChina department of Entomology Purdue UniversityWest LafayetteINUSA Instituto de Hortofruticultura Subtropical y Mediterranea"La Mayora"(IHSMUMA-CsiC) Consejo Superior de Investigaciones CientificasMalagaSpain National Crops Resources Research Institute KampalaUganda CIRAd UMR PVBMT CIRADPole de Protection des PlantesSaint-PierreFrance School of Applied Biosciences Kyungpook National UniversityDaeguRepublic of Korea uNESP Faculdade de Ciencias AgronomicasBotucatuBrazil department of Microbiology and Plant Pathology University of CaliforniaRiversideCA uSdA Agricultural Research Service 17123Emerging Pests and Pathogens Research UnitIthacaNYUSA

Identifying cryptic species poses a substantial challenge to both biologists and naturalists due to morphological *** tabaci is a cryptic species complex containing more than 44 putative species;several of which are currently among the world's most destructive crop *** and delimiting the evolution of this species complex has proved *** develop a comprehensive framework for species delimitation and identification,we evaluated the performance of distinct data sources both individually and in combination among numerous samples of the *** species complex acquired *** datasets include full mitogenomes,single-copy nuclear genes,restriction site-associated dNA sequencing,geographic range,host speciation,and reproductive compatibility ***,our well-supported topologies generated from three dense molecular markers highlighted the evolutionary divergence of species of the *** complex and suggested that the nuclear markers serve as a more accurate representation of *** species *** compatibility datasets facilitated the identification of at least 17 different cryptic species within our *** geographic range information provides a complementary assessment of species recognition,while the host range datasets provide low rate of delimiting *** further summarized different data performances in species classification when compared with reproductive compatibility,indicating that combination of mtCOI divergence,nuclear markers,geographic range provide a complementary assessment of species ***,we represent a model for understand.ng and untangling the cryptic species complexes based on the evidence from this study and previously published articles.

关键词： Bemisia tabaci cryptic species phylogenetics RAd-Seq reproductive compatibility whiteflies

外伤性视神经损伤及间充质干细胞治疗作用研究进展

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中华实验眼科杂志 2025年第1期43卷 69-79页

作者：袁湘玲姚瑶(综述) 伍子建(审校) 汕头大学•香港中文大学联合汕头国际眼科中心汕头515041

外伤性视神经损伤引起的视网膜神经节细胞(RGC)继发性死亡和轴突丢失是导致不可逆性视功能损害的主要原因。视神经受损后RGC的快速死亡及复杂的死亡途径致使临床治疗效果收效甚微。近年来,干细胞的潜能成为神经退行性病变组织修复再生... 详细信息

外伤性视神经损伤引起的视网膜神经节细胞(RGC)继发性死亡和轴突丢失是导致不可逆性视功能损害的主要原因。视神经受损后RGC的快速死亡及复杂的死亡途径致使临床治疗效果收效甚微。近年来,干细胞的潜能成为神经退行性病变组织修复再生的新治疗手段。成体干细胞,尤其是间充质干细胞(MSC),因其免疫调控特性和神经保护作用,在外伤性视神经损伤修复治疗上被广泛研究。MSC以旁分泌神经营养因子、释放外泌体及细胞移植直接接触受损组织等方式发挥神经保护作用促进RGC存活及轴突再生,并经处理后可增强其干细胞特性;此外,MSC可被诱导转分化为RGC,发挥细胞替代治疗的修复作用。本文将总结MSC在外伤性视神经损伤治疗方面的动物实验和临床研究进展,以及其作用机制,同时归纳了增强MSC神经保护作用的方法,还探讨未来MSC在外伤性视神经损伤上的发展方向,这有利于今后制定更完善可靠的MSC应用于外伤性视神经损伤的治疗策略。

关键词：外伤性视神经损伤间充质干细胞视网膜神经节细胞神经保护作用细胞替代治疗

Interaction of oblique waves with an array of long horizontal circular cylinders

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2007年第4期50卷 490-509页

作者： ng Chiu-On department of Mechanical Engineering the University of Hong Kong Pokfulam Road Hong Kong China

The scattering and radiations of linear oblique waves by multiple long horizontal circular cylinders submerged in water of finite depth are investigated using the multipole expansion method. Analytical expressions for the diffracted and radiated potentials are given as a linear combination of infinite multipoles. The unknown coefficients in the expressions are determined by using the addition theorem of the Bessel function and the cylinder boundary conditions. Also analytical expressions for wave forces, hydrodynamic coefficients and reflection and transmission coeffi-cients are derived. The present analytical solution is verified through the boundary element method and applied to investigate three different cases of the interaction of oblique waves with multiple submerged horizontal circular cylinders. The results show that the number of cylinders, the arrangement and spacing between cylinders play an important role in wave forces, hydrodynamic coefficients and reflection and transmission coefficients. Some interesting and important phenomena are ob-served in numerical experiments.

关键词： scattering and radiation water waves analytical technique hydrodynamic characteristics

Nonlinear dynamical characteristics of bed load motion

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2006年第3期49卷 365-384页

作者： Chiu-On ng department of Mechanical Engineering the University of Hong Kong Hong Kong China

Bed forms of various kinds that evolve naturally on the bottom of sandy coasts and rivers are a result of the kinematics of bed load transport. Based on the group motion of particles in the bed load within the bottom layer, a study on the nonlinear dy- namics of bed load transport is presented in this paper. It is found that some development stages, such as the initiation, the equilibrium sediment transport, and the transition from a smooth bed to sand dunes, can be accounted for by different states in the nonlinear sys- tem of the bed load transport. It is verified by comparison with experimental data reported by Laboratoire Nationae d’Hydraulique, Chatou, France, that the evolution from a smooth bed to sand dunes is determined by mutation in the bed load transport. This paper pre- sents results that may offer theoretical explanations to the experimental observations. It is also an attempt to apply the state-of-the-art nonlinear science to the classical sediment transport mechanics.

关键词： bed load, bed form, nonlinear dynamics.