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An approach for formation design and flight performance prediction based on aerodynamic formation unit:Energy-saving considerations

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Chinese Journal of Aeronautics 2024年第3期37卷 77-91页

作者： Nanxuan QIAO Tielin MA xiangsheng wang Jie wang Jingcheng FU Pu XUE School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China Institute of Unmanned System Beihang UniversityBeijing 100191China Key Laboratory of Advanced Technology of Intelligent Unmanned Flight System Ministry of Industry and Information TechnologyBeijing 100191China School of Transportation Science and Engineering Beihang UniversityBeijing 102206China Beijing Institute of Space Long March Vehicle Beijing 100076China

The performance improvement of swarm drones through aerodynamic shape optimization may be challenging due to folded size constraints imposed by the specific launch ***,fixed-wing aircraft swarms can benefit from formation flight in terms of energy *** study introduces the concept of the"aerodynamic formation unit",which consists of two or three aircraft that form an inseparable unit of the *** the Unmanned Aerial Vehicle(UAV)distribution and wingtip vortex interference in the formation,two typical aerodynamic formation units are optimized by the variable-fidelity aerodynamic optimization method based on space *** aerodynamic characteristics of the formation UAVs that affect flight performance,such as lift-to-drag ratio(L/D ratio)and static stability are analyzed by Computational Fluid Dynamics(CFD)*** L/D ratio(cruising condition)of the following aircraft can be increased by 22.8%and 57.5%in the optimal units that involve two and three aircraft ***,this study conducts several CFD simulations for multi-aircraft formations formed by the units,which show that the average L/D ratio of the formation can be improved by more than 19%.These results verify the feasibility and effectiveness of the"aerodynamic formation unit"concept and the optimization framework for formation parameters.

关键词： Formation flight CFD Aerodynamic formation unit Wingtip vortices Foldable tandem-wing aircraft

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明清封舟的航行动力风险及使团预防措施

重庆交通大学学报（社会科学版） 2024年第4期24卷 44-53页

作者：汪祥胜张忻昀江苏科技大学江苏镇江212003

明清时期,中琉交往频繁,册封琉球使团作为中方构设的官方渠道,数十次横渡东海、互通往来。中琉航路自然环境复杂,使团出行既有海氛未靖之险,更有惊涛骇浪、船破人危之虞。为应对封舟航行中自然动力带来的风险,使团采取提升封舟性能、改... 详细信息

明清时期,中琉交往频繁,册封琉球使团作为中方构设的官方渠道,数十次横渡东海、互通往来。中琉航路自然环境复杂,使团出行既有海氛未靖之险,更有惊涛骇浪、船破人危之虞。为应对封舟航行中自然动力带来的风险,使团采取提升封舟性能、改进航海技术、遴选贤才能士、储备应急物资等措施预防。在保障航海安全的同时,这些预防措施也对琉球的造船航海技术、文化、农业产生积极影响,推进中琉两国宗藩关系的发展。

关键词：封舟航海技术预防措施中琉关系

On the Generalized Geroch Conjecture for Complete Spin Manifolds

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Chinese Annals of Mathematics,Series B 2022年第6期43卷 1143-1146页

作者： xiangsheng wang Weiping ZHANG School of Mathematics Shandong UniversityJinan 250100China Chern Institute of Mathematics&LPMC Nankai UniversityTianjin 300071China.

Let W be a closed area enlargeable manifold in the sense of Gromov-Lawson and M be a noncompact spin manifold,the authors show that the connected sum M#W admits no complete metric of positive scalar *** W=T^(n),this p... 详细信息

关键词： Positive scalar curvature Connected sum Spin manifolds

从络论治慢性肾脏病研究进展及王祥生经验撷菁

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中国中医药现代远程教育 2024年第1期22卷 163-165页

作者：王仃仃付玉凤公冶晨霞王祥生济宁市中医院肾病科山东济宁272000 山东中医药大学山东济南250355

基于络病理论探索慢性肾脏病(CKD)的发病机制及治疗策略。查阅中医从络病学论治CKD的相关文献,总结王祥生教授临床运用络病理论治疗CKD经验。肾络不通是CKD的重要病机,肾络不通详而辨之可见瘀血阻络、湿浊阻络、毒邪阻络、风邪阻络等,... 详细信息

基于络病理论探索慢性肾脏病(CKD)的发病机制及治疗策略。查阅中医从络病学论治CKD的相关文献,总结王祥生教授临床运用络病理论治疗CKD经验。肾络不通是CKD的重要病机,肾络不通详而辨之可见瘀血阻络、湿浊阻络、毒邪阻络、风邪阻络等,通络之法辨证以通络,常用药物包括虫类、藤类、祛湿泄浊类,另有中医外治法辅助通络。从络论治的理论体系为CKD提供了系统的中医诊疗思路。

关键词：关格慢性肾脏病络病学通络王祥生

On the complex structure of symplectic quotients

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Science China Mathematics 2021年第12期64卷 2719-2742页

作者： xiangsheng wang Beijing International Center for Mathematical Research Peking UniversityBeijing 100871China School of Mathematics Shandong UniversityJinan 250100China

Let K be a compact *** a symplectic quotient M_(λ) of a compact Hamiltonian Kahler K-manifold,we show that the induced complex structure on M_(λ) is locally invariant when the parameter λ varies in Lie(K)^(*).To prove such a result,we take two di erent approaches:(i)use the complex geometry properties of the symplectic implosion construction;(ii)investigate the variation of geometric invariant theory(GIT)quotients.

关键词： complex structure symplectic reduction symplectic implosion geometric invariant theory

王祥生教授“健脾补肾、活血通络”法治疗慢性肾衰竭经验浅谈

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中医临床研究 2024年第9期16卷 77-80页

作者：公冶晨霞邹永艳孙秀梅王祥生济宁市中医院山东济宁272100

王祥生教授乃山东省名中医专家,享受国务院津贴荣誉,从事中医临床肾脏病多年,学术理论造诣颇深。笔者有幸拜师门下,跟随侍诊,每每深受启发,故总结归纳其学术思想,期望推广运用到临床,令更多的肾脏病患者受益。目的:探讨王祥生教授中医... 详细信息

王祥生教授乃山东省名中医专家,享受国务院津贴荣誉,从事中医临床肾脏病多年,学术理论造诣颇深。笔者有幸拜师门下,跟随侍诊,每每深受启发,故总结归纳其学术思想,期望推广运用到临床,令更多的肾脏病患者受益。目的:探讨王祥生教授中医治疗慢性肾衰竭学术思想与临床经验,并将其推广应用到临床,完成学术转化。方法:总结、归纳王祥生教授从医多年来治疗慢性肾衰竭的中医临床经验与学术思想。结果:通过查阅古今文献,对慢性肾衰竭病名、病因、病机进行剖析,总结出慢性肾衰竭病机是本虚标实,虚实夹杂证,脾肾亏虚是慢性肾衰竭的病机根本,肾脾乃先后天之根本,脾肾亏虚日久,脏腑正常生理功能受损,产生各种病理产物,如水湿、浊毒、瘀血等,其中瘀血既是病理产物又是致病因素,多种致病产物胶结发病。故治疗上健脾补肾是关键,活血通络贯穿始终,在此理论基础上根据中药传统疗效结合现代药物理论创立三联同步疗法,临床效果显著。结论:王祥生教授运用“健脾补肾、活血通络”法治疗慢性肾衰竭,标本兼顾,内外统筹,在临床取得颇好的疗效,值得我辈大力学习并推广,旨在给更多肾病患者带来曙光。

关键词：慢性肾衰竭健脾补肾、活血通络临床经验

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Experimental and numerical investigation of the flexural performance of channel steel-bolt joint for prefabricated subway stations

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Frontiers of Structural and Civil Engineering 2024年第6期18卷 918-935页

作者： Lei wang Shengyang ZHOU xiangsheng CHEN Xian LIU Shuya LIU Dong SU Shouchao JIANG Qikai ZHU Haoyu YAO College of Civil and Transportation Engineering Shenzhen UniversityShenzhen 518060China Key Laboratory of Coastal Urban Resilient Infrastructures(MOE) Shenzhen UniversityShenzhen 518061China Shenzhen Key Laboratory of Green Efficient and Intelligent Construction of Underground Metro StationShenzhen UniversityShenzhen 518061China College of Civil Engineering Tongji UniversityShanghai 200092China Shenzhen Municipal Design&Research Co. Ltd.Shenzhen 518029China Shenzhen Metro Group Co. Ltd.Shenzhen 518026China

Flexural performance of joints is critical for prefabricated *** study presents a novel channel steel-bolt(CB)joint for prefabricated subway ***-scale tests are carried out to investigate the flexural behavior of the CB joint under the design loads of the test-case *** addition,a three dimensional(3D)finite element(FE)model of the CB joint is established,incorporating viscous contact to simulate the bonding and detachment behaviors of the interface between channel steel and *** on the 3D FE model,the study examines the flexural bearing mechanism and influencing factors for the flexural performance of the CB *** results indicate that the flexural behavior of the CB joint exhibits significant nonlinear characteristics,which can be divided into four *** illustrate the piecewise linearity of the bending moment-rotational angle curve,a four-stage simplified model is proposed,which is easily applicable in engineering *** study reveals that axial force can enhance the flexural capacity of the CB joint,while the preload of the bolt has a negligible *** flexural capacity of the CB joint is approximate twice the value of the designed bending moment,demonstrating that the joint is suitable for the test-case station.

关键词： channel steel-bolt joint flexural performance full-scale test numerical simulation prefabricated subway station

Effect of phase transition during roasting of Mountain Pass rare earth concentrate on leaching efficiency of rare earths

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Journal of Rare Earths 2024年第2期42卷 409-414,I0006页

作者： Yanyan Zhao Xu Sun Deliang Meng xiangsheng Liu Qiang Zhong Zongyu Feng National Engineering Research Center for Rare Earth Grirem Advanced Materials Co.Ltd.Beijing0088China Rare Earth Functional Materials(Xiong'an)Innovation Center Co. Ltd.Xiongan071700China General Research Institute for Nonferrous Metals Beijing100088China

To find a greener and more economical approach for treating the Mountain Pass rare earth concentrate(MPREC),a novel "Combination Method",including the processes of oxidizing roasting,HCI leaching and sulfuric acid roasting,is proposed in this *** this paper,the effect of phase transition behavior in hydrochloric acid leaching during oxidative roasting at 450-600℃ was *** roasting,the bastnasite in MPREC is decomposed into CeLa_(2)O_(3)F_(3) and(Ce_(0.33),La_(0.33),Ca_(0.33))O_(1.5).As the CeLa_(2)O_(3)F_(3) phase has the fluorine-fixation effect,the generated CeLa_(2)O_(3)F_(3) phase can not be dissolved by HCI after roasting at 500 and 550℃,but it can be decomposed by HCI after roasting at over 600℃,resulting in the improvement of the leaching rate of total F *** maximum leaching efficiency of rare earth elements(REEs) can reach 70.32 wt% at the roasting temperature of 550℃.After roasting at over 600℃,some F^-ions in the solution combined with RE^(3+) to form REF_(3) precipitate and enter the leaching residue,and the others are in the form of [CeF_(3)]^+ in the leaching solution during leaching,therefore,the leaching efficiency of non-ce rium REEs decreases while that of cerium element *** work provides basic research for optimizing the actual production process of MPREC.

关键词： Mountain pass rare earth mine Roasting Phase change Rare earths

An integrated framework for automatic green building evaluation:A case study of China

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Frontiers of Engineering Management 2024年第2期11卷 269-287页

作者： Qiufeng HE Zezhou WU xiangsheng CHEN State Key Laboratory of Intelligent Geotechnics and Tunnelling Shenzhen 518060China Key Laboratory for Resilient Infrastructures of Coastal Cities(Shenzhen University) Ministry of EducationShenzhen 518060China Sino-Australia Joint Research Centre in BIM and Smart Construction Shenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Green Efficient and Intelligent Construction of Underground Metro StationShenzhen 518060China

With the burgeoning emphasis on sustainable construction practices in China,the demand for green building assessment has significantly *** overall evaluation process comprises two key components:The acquisition of evaluation data and the evaluation of green scores,both of which entail considerable time and *** research predominantly concentrated on automating the latter process,often neglecting the exploration of automating the former in accordance with the Chinese green building assessment ***,there is a pressing requirement for more streamlined management of structured standard knowledge to facilitate broader *** response to these challenges,this paper presents a conceptual framework that integrates building information modeling,ontology,and web map services to augment the efficiency of the overall evaluation process and the management of standard *** specifically,in accordance with the Assessment Standard for Green Building(GB/T 50378-2019)in China,this study innovatively employs visual programming software,Dynamo in Autodesk Revit,and the application programming interface of web map services to expedite the acquisition of essential architectural data and geographic information for green building ***,ontology technology is harnessed to visualize the management of standard knowledge related to green building assessment and to enable the derivation of green scores through logical ***,a residential building is employed as a case study to validate the theoretical and technical feasibility of the developed automated evaluation conceptual framework for green *** research findings hold valuable utility in providing a self-assessment method for applicants in the field.

关键词： automatic evaluation green building BIM web map service ontology inference application