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Fused structures for safer and more economical constructions

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Frontiers of Structural and Civil Engineering 2020年第1期14卷 1-9页

作者： Yu-Fei WU ying-Wu zhou Biao HU Xiaoxu HUANG Scott SMITH School of Engineering RMIT UniversityMelbourneVIC 3001Australia Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering Shenzhen UniversityShenzhen 518061China School of Civil Environmental and Mining EngineeringThe University of AdelaideSouth Australia 5005Australia

Safety margin and construction costs are two conflicting goals for a *** providing a fuse in a structure that is triggered at a certain level of over-loading,further increase of loading is prohibited and failure of the structure is changed to a safer *** overloading is controlled and a safer failure mode is enforced,a fused structure requires a smaller safety factor thus leading to more economical construction without compromising *** use of a fuse will also facilitate safer use of advanced construction materials such as fiber-reinforced polymer(FRP)*** this case,a fuse can transfer the sudden and dangerous failure mode associated with brittle FRP debonding or rupture to a safe and ductile failure mode at the fuse *** paper introduces a new type of fused structure as well as an associated design philosophy and approach,in addition to examples of engineering applications.

关键词： fused structures structural fuse fiber-reinforced polymer concrete

Support interaction of Pt/CeO2 and Pt/SiC catalysts prepared by nano platinum colloid deposition for CO oxidation

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Journal of Rare Earths 2020年第4期38卷 376-383页

作者： Kang Xi Yong Wang Kang Jiang Jing Xie ying zhou Hanfeng Lu Innovation Team of Air Pollution Control Institute of Catalytic Reaction EngineeringCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014China

The interaction between Pt and its various supports can regulate the intrinsic electronic structure of Pt particles and their catalytic ***,Pt/CeO2 and Pt/SiC catalysts were successfully prepared via a facile Pt colloidal particle deposition method,and their catalytic performance in CO oxidation was ***,TEM,XPS and H2-TPR were used to identify the states of Pt particles on the support surface,as well as their effect on the performance of the *** of the Pt-O-Ce interaction is one of the factors controlling catalyst *** the oxidative treatment at low temperature,the Pt-O-Ce interaction plays an important role in improving the catalytic *** calcining at high temperature,enhanced Pt-O-Ce interaction results in the absence of metallic Pt0 on the support surface,as evidenced by the appearance of Pt2+*** is consistent with the XPS data of Pt/CeO2,and is the main reason behind the deactivation of the *** contrast,either no interaction is formed between Pt and SiC or Pt nanoparticles remain in the metallic Pt0 state on the SiC surface even after aging at 800℃in an oxidizing ***,the Pt/SiC shows better thermal stability than Pt/*** interaction between Pt and the active support may be concluded to be essential for CO oxidation at low temperature,but strong interactions may induce serious deactivation of catalytic activity.

关键词： Nano platinum colloid CO oxidation Pt-O-Ce interaction CeO2 SiC Rare earths

Low temperature conversion of methane to syngas using lattice oxygen over NiO-MgO

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Chinese Chemical Letters 2022年第10期33卷 4687-4690页

作者： Junbu Wang Zeai Huang ying Wang Jundao Wu Zhiqiang Rao Fang Wang ying zhou State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610500China Institute of Carbon neutrality&School of New Energy and Materials Southwest Petroleum UniversityChengdu 610500China

The conversion of methane to syngas(H_(2) and CO)is an important route to produce high value-added *** methane into syngas in the absence of gaseous oxidants is an economical *** this work,NiO-MgO composite is successfully synthesized via an impregnation *** 764 K,methane is directly converted to syngas on the NiO-MgO without gaseous oxidants.A synergistic effect of NiO and MgO was observed,in which NiO induced lattice oxygen of MgO mobility to oxidize methane and suppressed the formation of intermediates for side *** a result,NiO-MgO exhibited enhancement of catalytic activity with the H2 production rate of 1241.0µmol g^(-1) min^(-1),which was 3.4 times higher than that of pure *** work provides a direct guidance to understand of methane oxidation via lattice oxygen under low temperature(<773 K).

关键词： Methane Lattice oxygen Syngas Hydrogen NiO

Two-dimensional film cooling over a flat plate in hypersonic flow

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Propulsion and Power Research 2018年第3期7卷 205-217页

作者： ying zhou Hong Wu Yulong Li Yi Cai National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics&Collaborative Innovation Center for Advanced Aero-EngineSchool of Energy and Power EngineeringBeihang UniversityBeijing 100191China Aero Engine Corporation of China Beijing 100191China

Film cooling,as one efficient active cooling method,will hopefully be used in‘hypersonic vehicles’in the *** hypersonic vehicle's surface is more likely a flat plate than a blunt body,so the cooling characteristics of two-dimensional(2-D)film cooling over a flat plate in hypersonic flow are studied using both theoretical analysis and numerical methods.A cooling efficiency calculation formula under a hypersonic condition is obtained and the numerical results show that it has great predicting *** with the low-speed main-flow condition,several differences exist in the hypersonic main-flow condition.A parameter called the‘generalized turbulent mixing coefficient’is introduced and its approximate value range is given based on numerical results.

关键词： Film cooling Hypersonic vehicle Space technology Numerical simulation Cooling efficiency

Association between Helicobacter pylori infection and migraine: A meta-analysis

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World Journal of Gastroenterology 2014年第40期20卷 14965-14972页

作者： Jing Su Xiao-ying zhou Guo-Xin Zhang Department of Gastroenterology The First Affiliated Hospital of Nanjing Medical University First Clinical Medical College of Nanjing Medical University

AIM: To quantify the association between Helicobacter pylori (H. pylori) infection and migraine.

关键词： Helicobacter pylori Migraine Meta-analysis Odds ratio Subgroup analysis

Review of the energy-based design theory:Towards the application to self-centering systems

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Resilient Cities and Structures 2022年第1期1卷 80-97页

作者： Ge Song ying zhou T.Y.Yang State Key Laboratory of Disaster Reduction in Civil Engineering Tongji UniversityShanghai 200092China International Joint Research Laboratory of Earthquake Engineering Tongji UniversityShanghai 200092China Department of Civil Engineering The University of British ColumbiaVancouver V6T1Z4Canada

Self-centering systems exhibit superior performance during earthquake shaking with lower damage and less resid-ual *** the equivalent static force design procedure is the commonly used one for most structural systems for seismic applications,the cumulative damage and the effective duration of earthquakes cannot be explicitly considered,which has significantly affected the behaviors and post-earthquake performance of self-centering ***-based design theory(EBDT),which introduces the energy demand as the crit-ical parameter to establish relations with structural damage,has gained attention around the world in recent *** EBDT can provide comprehensive considerations for structural responses and damage in design procedures,especially for self-centering ***,few researches and actual energy design projects fo-cus on the use of EBDT for self-centering *** paper intends to present thorough review of several critical issues in ***,pivotal gaps that need to be further investigated towards the application of EBDT to self-centering systems are identified and discussed in the paper.

关键词： Self-centering systems Lower damage Cumulative damage Duration of earthquakes Energy-based design theory

Intrinsic defect study on ternary ABX2 diamond-like thermoelectric materials and analysis of the density of energy function

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Journal of Materiomics 2021年第1期7卷 19-24页

作者： ying zhou Xin Li Lili Xi Jiong Yang Materials Genome Institute Shanghai UniversityShanghai200444China

The complex intrinsic defects of four ternary diamond-like ABX2(A:Cu/Ag;B:In;X:Te/Se)compounds are studied by first-principles *** results show that Cu-based compounds are likely to generate acceptor VA defect with p-type,while Ag-based compounds form donor BA with *** reasons are analyzed by the newly introduced density of energy(DOE).

关键词： Defect Thermoelectric materials Density of energy

Adaptive Variable Structure Control of MIMO Nonlinear Systems with Time-varying Delays and Unknown Dead-zones

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International Journal of Automation and computing 2009年第2期6卷 124-136页

作者： Tian-Ping Zhang Cai-ying zhou Qing Zhu Department of Automation College of Information Engineering Yangzhou University Yangzhou 225009 PRC

In this paper, adaptive variable structure neural control is presented for a class of uncertain multi-input multi-output （MIMO） nonlinear systems with state time-varying delays and unknown nonlinear dead-zones. The unknown time-varying delay uncer- tainties are compensated for using appropriate Lyapunov-Krasovskii functionals in the design. The approach removes the assumption of linear function outside the deadband without necessarily constructing a dead-zone inverse as an added contribution. By utilizing the integral-type Lyapunov function and introducing an adaptive compensation term for the upper bound of the residual and optimal approximation error as well as the dead-zone disturbance, the closed-loop control system is proved to be semi-globally uniformly ultimately bounded. In addition, a modified adaptive control algorithm is given in order to avoid the high-frequency chattering phenomenon. Simulation results demonstrate the effectiveness of the approach.

关键词： Adaptive control neural networks (NNs) variable structure control dead-zone nonlinear time-varying delay systems.

Sonic Hedgehog signaling pathway in primary liver cancer cells

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Asian Pacific Journal of Tropical Medicine 2014年第9期7卷 735-738页

作者： Lian-Yi Guo Pei Liu ying Wen Wei Cui ying zhou First Hospital Affiliated to Chinese Medical University Shenyang

Objective:To investigate clinical significance of Sonic Hedgehog(SHH)signaling pathway molecular Shh,Smo and Gli2 in primary hepatocellular carcinoma(HCC)***:A total of 30 HCC tissue samples were *** expression of SHH signaling pathway molecules Shh,Smo and Gli2 in HCC tissues and para-carcinoma tissue were detected by using immimohistochemical *** and normal liver tissue specimens were observed as control to analyze the expression of SHH signaling pathway molecular Shh,Smo and Glil mRMA in HCC tissues and corresponding para—carcinoma tissues and its relationship with the onset of ***:There was no expression of Shh,Smo and Gli2 protein in normal liver tissue,while their positive rates were 63.3%,76.79%and 66.7%in HCC tissues,respectively,with a significantly higher expression level than that in the para-carcinoma tissue(P0.05);Shh and Smo protein was detected in part of cirrhosis with positive expression,but Gli2 protein was not observable in cirrhosis ***:In HCC tissues,the high expression level of SHH signaling pathway molecules signal peptide(Shh),membrane protein receiptor(Smo)and nuclear transcription molecular(Gli2)can be indicators of the onset of liver cancer.

关键词： HCC Sonic Hedgehog signaling pathway Expression