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Experimental and numerical study regarding H-steel all-bolted connection steel frame with composite wall boards

Earthquake Engineering and Engineering Vibration 2024年第2期23卷 427-443页

作者： Fan Min guo hongchao Li Shen Wang Zhenshan Wang Huaqiang School of Civil Engineering and Architecture Xi’an University of TechnologyXi’an 710048China State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area Xi’an University of TechnologyXi’an 710048China

H-steel all-bolted connection steel frame structures with heat preservation and decoration composite wall boards were investigated and the seismic performances of three scaled specimens were *** failure modes,hysteresis curves,bearing capacity,ductility,energy dissipation capacity,stiffness degradation and strain distribution were *** calculation method of structural theoretical internal force was *** results showed that the overall structural seismic performance was better,and the structural ductility met the demands of elastic-plastic inter-story drift angle for seismic *** H-steel weak-axis connection structure obtained better energy dissipation capacity,and its bearing capacity and stiffness were slightly different from the strong-axis *** heat preservation and decoration performance of composite wallboard and the all-bolted connection of the steel frame realized prefabrication during the whole construction *** plastic hinge of the steel beam can be moved outwards because of the L-angles,which effectively avoids stress concentration in joint areas and expands the plastic hinge *** errors between the theoretical structural capacity calculated by the plastic analysis method and the test results were within 2.44%.In addition,structural failure mechanisms and bearing capacities were verified by the finite element(FE)analysis,and the effects of the main parameters on the structures were *** FE verification results were the same as in the *** research results provide theoretical support and technical guidance for the application of thermal insulation and decorative composite wall panels in H-shaped steel all-bolted steel frames.

关键词： composite wall boards all-bolted steel frame H-steel low-cyclic loading failure modes

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Recent advances in catalytic asymmetric hydrogenation:Renaissance of the monodentate phosphorus ligands

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Chinese Science Bulletin 2004年第19期49卷 2003-2016页

作者： guo hongchao DING Kuiling DAI Lixin State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

The history for the development of chiral phos- phorus ligands in catalytic asymmetric hydrogenation is briefly highlighted. This review focuses on the recent ad- vances in the synthesis of the monodentate phosphorus ligands and their applications in catalytic asymmetric hydrogenation. The examples highlighted in this article clearly demonstrated the importance and advantages of monodentate phosphorus ligands, which had been ignored for 30 a and experienced arenaissance at the very beginning of this millennium, particularly in the area of asymmetric hydrogenation.

关键词： chiral phosphorus ligands monodentate ligands asym-metric catalysis hydrogenation

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Synthesis and crystal structure of SrNi_xV_(6-x)O_(11)

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Chinese Science Bulletin 1997年第10期42卷 850-855页

作者： LIU hongchao, guo Changlin and TU HengyongShanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai China

THE AV6O11（A,alkaline or alkaline earth metals）-type compounds are the only phases

关键词： SrNixV6-xO11 crystal structure X-ray powder diffraction Rietveld method bond-valence method.

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Double[3+2] cycloaddition of nitrile oxides with allenoates:Synthesis of spirobidihydroisoxazoles

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Chinese Chemical Letters 2019年第2期30卷 363-366页

作者： Wei Sun Feng Jiang Honglei Liu Xing Gao Hao Jia Cheng Zhang hongchao guo Department of Applied Chemistry China Agricultural University

The double [3 + 2] cycloaddition of allenoates with nitrile oxides is presented. The reaction worked well under mild reaction conditions to give the spirobidihydroisoxazole in moderate to excellent yields with excellent diastereoselectivities. The two dihydroisoxazole rings have been formed via a sequential double [3 + 2] cycloaddition.

关键词： Cycloaddition Allenoate Nitrile oxide Spirocyclic heterocyle

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NON-LINEAR ANALYSIS OF WAVE FORCE ON HORIZONTAL CYLINDER

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China Ocean Engineering 1987年第2期1卷 1-10页

作者： Xue hongchao, guo Da Yan Yixin (East China Technical University of Water Resources, Nanjing) East China Technical Univ of Water Resources Nanjing China East China Technical Univ of Water Resources Nanjing China

The key of which lies in determining exactly the unknown Drag coefficient CDXand Inertiacoefficient CMX. Here the coefficients KDXand KMXare given functions of relative diameterof cylinder d/H, wave steepness δ= H/L and Characteristic wave celerity C~*=C2/gH; they can bewritten as The laboratory tests have proved that the velocity field of regular waves is nearly

关键词： exp NON-LINEAR ANALYSIS OF WAVE FORCE ON HORIZONTAL CYLINDER

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Pd-catalyzed cascade cyclization of allenylethylene carbonates and indandiones: Synthesis of tetracyclic dihydrocyclopentaindenofuranone derivatives

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Chinese Chemical Letters 2023年第10期34卷 131-134页

作者： Yujie Dong Jun Liu Xing Gao Ting Pan Biming Mao Songcheng Yu Yongjun Wu Cheng Zhang hongchao guo Department of Chemistry and Innovation Center of Pesticide Research China Agricultural UniversityBeijing 100193China College of Public Health Zhengzhou UniversityZhengzhou 450001China

A palladium-catalyzed cascade cyclization of allenylethylene carbonates with 1,3-indandiones was developed, providing biologically interesting tetracyclic dihydrocyclopentaindenofuranone derivatives having three contiguous quaternary carbon centers in moderate to high yields with excellent diastereoselectivities. In this reaction, the allene moiety was fully fused into the cyclopentene ring.

关键词： Palladium Allenylethylene carbonates Indandiones Cascade cyclization Decarboxylation

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Achieve load balancing with a dynamic re-routing CICQ switching scheme

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Science China(Information Sciences) 2012年第2期55卷 407-418页

作者： HU hongchao,guo YunFei,YI Peng & LAN JuLong Department of Broadband Information Networks,National Digital Switching System Engineering & Technological R&D Center(NDSC),Zhengzhou 450002,China Department of Broadband Information Networks National Digital Switching System Engineering & Technological R&D Center (NDSC) Zhengzhou China

Multi-path based routing and switching can achieve network-wide load balancing and reduce the port conflicts of switching *** by this novel idea,in this paper,through analyzing the feasibility of implementing multi-next-hops in core switching networks comprehensively,we advance a switching scheme called MHRS(multi-next-hop re-routing switch)and a forwarding table management scheme called HMFT(hierarchical multi-stage forwarding table)to support multi-next-hop dynamical *** implements dynamical re-routing in the switches according its congestion status to achieve real-time load balancing,while HMFT can provide traffic with different forwarding paths based on their QoS *** analysis and simulation results show that switches equipped with HMFT and MHRS can provide good delay and throughput ***,they can reduce port conflicts significantly.

关键词： switching fabric scheduling policy load balancing dynamical re-routing

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Achieving fair service with a hybrid scheduling scheme for CICQ switches

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Science China(Information Sciences) 2012年第3期55卷 689-700页

作者： HU hongchao , guo YunFei, YI Peng & LAN JuLong Department of Broadband Information Networks, National Digital Switching System Engineering & Technological R&D Center (NDSC), Zhengzhou 450002, China Department of Broadband Information Networks National Digital Switching System Engineering & Technological R&D Center (NDSC) Zhengzhou China

Providing performance guarantees for arriving traffic flows has become an important measure for today’s routing and switching systems. However, none of current scheduling algorithms built on CICQ (combined input and cross-point buffered) switches can provide flow level performance guarantees. Aiming at meeting this requirement, the feasibility of implementing flow level scheduling is discussed thoroughly. Then, based on the discussion, it comes up with a hybrid and stratified fair scheduling (HSFS) scheme, which is hierarchical and hybrid, for CICQ switches. With HSFS, each input port and output port can schedule variable length packets independently with a complexity of O(1). Theoretical analysis show that HSFS can provide delay bound, service rate and fair performance guarantees without speedup. Finally, we implement HSFS in SPES (switch performance evaluation system) to verify the analytical results.

关键词： switching fabric scheduling policy load balancing dynamical re-routing

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氢键促进的级联重排

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有机化学 2021年第1期41卷 433-434页

作者：王亚俐郭红超榆林学院化学与化工学院陕西榆林71900 中国农业大学化学系北京100193

多环喹啉衍生物是一类非常重要的化合物,广泛存在于天然产物与生物活性分子中,在过去几十年中受到广泛关注.从易得原料快速构建多环喹啉衍生物,开发简单、高效、步骤经济性的合成方法具有重要意义.级联反应是开展天然产物全合成和合成... 详细信息

多环喹啉衍生物是一类非常重要的化合物,广泛存在于天然产物与生物活性分子中,在过去几十年中受到广泛关注.从易得原料快速构建多环喹啉衍生物,开发简单、高效、步骤经济性的合成方法具有重要意义.级联反应是开展天然产物全合成和合成砌块构建的重要方法^([1]),其中基于异腈的级联反应为杂环化合物的制备提供了非常有用的途径^([2]).

关键词：喹啉衍生物杂环化合物天然产物生物活性分子合成砌块氢键级联反应快速构建

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亚甲基乙烯基亚乙基碳酸酯:一种用于钯催化环加成反应的新型合成子

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有机化学 2021年第5期41卷 2134-2135页

作者：郝向洪郭红超中国农业大学化学系北京100193

碳环和杂环结构是构成大量生物活性天然产物、药用合成化合物、农药、材料等的重要结构单元,因此,发展经济、高效的环状结构的构建反应具有重要意义.研究经济、高效、原子利用率高的环加成反应用于构建环状分子一直是有机合成领域的一... 详细信息

碳环和杂环结构是构成大量生物活性天然产物、药用合成化合物、农药、材料等的重要结构单元,因此,发展经济、高效的环状结构的构建反应具有重要意义.研究经济、高效、原子利用率高的环加成反应用于构建环状分子一直是有机合成领域的一项重要工作.作为一类十分重要的有机反应活性中间体,π-烯丙基钯两性离子中间体因其良好的反应活性受到有机合成化学家们的密切关注,围绕它们开发的环加成反应已成为合成碳环和杂环化合物的有力工具[1-3].一般而言,钯催化环加成反应起始于钯催化剂与烯丙基化合物的作用,由此产生的烯丙基钯两性离子进一步反应完成环加成反应.这种反应模式决定了钯催化环加成反应的开发高度依赖于烯丙基化合物的种类和特性,因此发掘和设计适用于钯催化环加成反应的烯丙基化合物是发展钯催化环加成反应的关键.一种新型烯丙基化合物的发现,往往会导致发现新型环加成反应.

关键词：环加成反应有机合成化学钯催化烯丙基化合物合成子碳环环状分子反应模式

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