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Moment Redistribution Effect of the Continuous Glass Fiber Reinforced Polymer-Concrete Composite Slabs Based on Static Loading Experiment

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Structural Durability & Health Monitoring 2025年第1期19卷 105-123页

作者： Zhao-Jun Zhang Wen-Wei Wang Jing-Shui Zhen Bo-cheng Li De-cheng cai Yang-Yang Du Hui Huang Offshore Oil Engineering Co.Ltd. Tianjin300461China Department of Bridge Engineering School of TransportationSoutheast UniversityNanjing211189China

This study aimed to investigate the moment redistribution in continuous glass fiber reinforced polymer(GFRP)-concrete composite slabs caused by concrete cracking and steel bar yielding in the negative bending moment *** experimental bending moment redistribution test was conducted on continuous GFRP-concrete composite slabs,and a calculation method based on the conjugate beam method was *** composite slabs were formed by combining GFRP profiles with a concrete layer and supported on steel beams to create two-span continuous composite slab *** methods,epoxy resin bonding,and stud connection,were used to connect the composite slabs with the steel *** experimental findings showed that the specimen connected with epoxy resin exhibited two moments redistribution phenomena during the loading process:concrete cracking and steel bar yielding at the internal *** contrast,the composite slab connected with steel beams by studs exhibited only one-moment redistribution phenomenon throughout the loading *** the concrete at the internal support cracked,the bending moment decreased in the internal support section and increased in the midspan *** the steel bars yielded,the bending moment further decreased in the internal support section and increased in the mid-span *** GFRP profiles do not experience cracking,there was no significant decrease in the bending moment of the mid-span *** test specimens experienced compressive failure of concrete at the mid-span *** results showed good agreement between the calculated and experimental values of bending moments in the mid-span section and internal support *** proposed model can effectively predict the moment redistribution behavior of continuous GFRP-concrete composite slabs.

关键词： Moment redistribution GFRP-concrete composite slabs bending moment experimental study analysis model

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Simultaneous Stabilization of Port-Hamiltonian Systems Subject to Actuation Saturation and Input Delay

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International Journal of Automation and computing 2021年第5期18卷 849-854页

作者： Liang-cheng cai Department of Electrical Engineering Southwest Jiaotong UniversityEmei 614202China

This paper investigates the simultaneous stabilization of Port-Hamiltonian(PH) systems subject to actuation saturation(AS) and input delay. Firstly, two parallel connecting PH systems subject to the AS and input delay are proposed. Secondly, a simultaneous stabilization control law is designed by a difference between the two feedback control laws containing the input ***, computing a Lyapunov-Krasovskii function assures the simultaneous stabilization of the above systems. Finally, simulation is given to show the correctness of the proposed contents.

关键词： Port-Hamiltonian system(PH) simultaneous stabilization actuator saturation input delay Lyapunov-Krasovskii function

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Generalized Multi-component TC Hierarchy and Its Multi-component Integrable Coupling System

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Communications in Theoretical Physics 2005年第5X期44卷 793-798页

作者： XIA Tie-cheng YOU Fu-cai Department of Mathematics Shanghai University Shanghai 200444 China

A new 3M-dimensional Lie algebra X is constructed firstly. Then, the corresponding loop algebra X is produced, whose commutation operation defined by us is as simple and straightforward as that in the loop algebra *** follows that a generalscheme for generating multi-component integrable hierarchy is proposed. By taking advantage of X, a new isospectral problem is established, and then well-known multi-component TC hierarchy is obtained. Finally,an expanding loop algebra FM of the loop algebra X is presented. Based on the FM, the multi-component integrable coupling system of the generalized multi-component TC hierarchy has been worked out. The method in this paper can be applied to other nonlinear evolution equations hierarchies. It is easy to find that we can construct any finite-dimensional Lie algebra by this approach.

关键词： loop algebra multi-component TC hierarchy multi-component integrable coupling system

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Improved oxidation of hydrogen off-gas by hydrophobic surface modification: A multiscale density functional theory study

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Particuology 2019年第3期17卷 28-35页

作者： cheng Lian cheng cai Xiangjian Shen Shuangliang Zhao Xinhai Yu Honglai Liu State Key Laboratory of Chemical Engineering and School of Chemical Engineering East China University of Science and Technology Shanghai 200237 China School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai 220237 China Research Center of Heterogeneous Catalysis and Engineering Science School of Chemical Engineering and Energy Zhengzhou University Zhengzhou 450001 China Key Laboratory of Safety Science of Pressurized System (MOE) School of Mechanical Engineering East China University of Science and Technology Shanghai 200237 China

A catalytic micro-reactor for converting hydrogen off-gas into water was recently developed, through which the conversion efficiency of hydrogen gas was greatly improved by hydrophobic modification of the catalytic substrate. Herein, a hybrid theoretical method is reported that combines density functional theory (DFT) on both the quantum and molecular scales. This method allows the microscopic study of the mechanism by which the surface catalytic reaction can be manipulated. Specifically, quantum DFT calculations are performed to quantify the molecular interaction between the catalytic substrate and reagent or product. Classical DFT investigations are subsequently carried out to determine the local concentrations of reagents near catalytic sites subject to different surface coating conditions. Finally, the reaction efficiency is determined from the local concentrations based on collision theory. This multiscale method provides molecular insight for quantifying the effect of catalytic surface modification on the reaction efficiency. The method reveals that an optimal surface hydrophobic modification can promote the densities of reagents near the substrate, while depleting the produced water. These two factors promote the conversion efficiency. The exclusion of produced water from the catalytic substrate is affected more by the degree of polymer grafting than by the chain length of hydrophobic polymer moieties.

关键词： Surface reaction Hydrophobic modification Density functional theory Multiscale

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Inflammatory response of macrophages in infection

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Hepatobiliary & Pancreatic Diseases International 2014年第2期13卷 138-152页

作者： Ling Zhang cheng-cai Wang Center for Educational Technology Second Military Medical University Department of Anesthesiology Changzhen HospitalSecond Military Medical University

BACKGROUND: Macrophages are widely-distributed innate immune cells playing diverse roles in various physiological and pathological processes. The primary function of macrophages is to phagocytize and clear invading *** SOURCES: A systematic search of PubMed was performed to identify relevant studies in English language literature using the key words such as macrophage and inflammation. A total of 122 articles related to inflammatory response of macrophages in infection were systematically ***: The inflammatory responses of macrophages triggered by infection comprise four interrelated phases:recognition of pathogen-associated molecular patterns by pattern-recognition receptors expressed on/in macrophages;enrichment of quantity of macrophages in local infected tissue by recruitment of circulating monocytes and/or in situ proliferation; macrophage-mediation of microbicidal activity and conversion to anti-inflammatory phenotype to terminate anti-infectious response and to promote tissue *** regulation of macrophage activation at molecular level recognized in the past decade is also reviewed, including intracellular multiple signaling molecules, membrane molecules,microRNAs and even epigenetic-associated ***: The inflammatory response of macrophages in infection is an orderly and complicated process under elaborate regulation at molecular level.

关键词： macrophage inflammation infection Toll-like receptor

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Metal phosphonate-derived cobalt/nickel phosphide@N-doped carbon hybrids as efficient bifunctional oxygen electrodes for Zn-air batteries

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Frontiers of Chemical Science and Engineering 2022年第9期16卷 1367-1376页

作者： cai-Yue Wang Meng-Qi Gao cheng-cai Zhao Li-Min Zhao Hui Zhao School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000China

The exploration of efficient bifunctional electrocatalysts for oxygen reduction reaction and oxygen evolution reaction is pivotal for the development of rechargeable metal–air *** metal phosphides are emerging as promising catalyst candidates because of their superb activity and low ***,a novel metal phosphonate-derived cobalt/nickel phosphide@N-doped carbon hybrid was developed by a carbothermal reduction of cobalt/nickel phosphonate hybrids with different Co/Ni molar *** metal phosphonate derivation method achieved an intimately coupled interaction between metal phosphides and a heteroatom-doped carbon *** resultant Co_(2)P/Ni_(3)P@NC-0.2 enables an impressive electrocatalytic oxygen reduction reaction activity,comparable with those of state-of-the-art Pt/C catalysts in terms of onset potential(0.88 V),4e‒selectivity,methanol tolerance,and long-term ***,remarkable oxygen evolution reaction activity was also observed in alkaline *** high activity is ascribed to the N-doping,abundant accessible catalytic active sites,and the synergistic effect among the *** work not only describes a highefficiency electrocatalyst for both oxygen reduction reaction and oxygen evolution reaction,but also highlights the application of metal phosphonate hybrids in fabricating metal phosphides with tunable structures,which is of great significance in the energy conversion field.

关键词： metal phosphonate cobalt/nickel phosphide N-doped carbon oxygen electrochemistry Zn−air battery

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冠状动脉粥样硬化、急性脑梗死患者血栓弹力图血小板图参数、血小板凝集功能及其之间的关系

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实用心脑肺血管病杂志 2025年第1期33卷 44-49页

作者：李师亮冯异程才郑萍华中科技大学同济医学院附属同济医院心脏大血管外科湖北省武汉市430000

目的分析冠状动脉粥样硬化(CAA)、急性脑梗死(ACI)患者血栓弹力图血小板图(TEG-PM)参数、血小板凝集功能情况及其之间的关系。方法选取2020-01-01至2022-01-01华中科技大学同济医学院附属同济医院收治的CAA患者73例为CAA组及ACI患者66例... 详细信息

目的分析冠状动脉粥样硬化(CAA)、急性脑梗死(ACI)患者血栓弹力图血小板图(TEG-PM)参数、血小板凝集功能情况及其之间的关系。方法选取2020-01-01至2022-01-01华中科技大学同济医学院附属同济医院收治的CAA患者73例为CAA组及ACI患者66例为ACI组。选取同期在华中科技大学同济医学院附属同济医院体检中心进行健康体检者52例为对照组。根据疾病严重程度,将CAA组患者进一步分为Ⅰ级亚组(冠状动脉无明显狭窄,n=20)、Ⅱ级亚组(冠状动脉狭窄率为40%~69%,n=19)、Ⅲ级亚组(冠状动脉狭窄率为70%~99%,n=20)、Ⅳ级亚组(冠状动脉完全闭塞,n=14),将ACI组患者进一步分为轻度亚组[美国国立卫生研究院卒中量表(NIHSS)评分为1~4分,n=35]、中度亚组(NIHSS评分为5~15分,n=15)、重度亚组(NIHSS评分≥16分,n=16)。比较CAA组与对照组、ACI组与对照组及不同疾病严重程度CAA、ACI患者TEG-PM参数[凝血反应时间(R)、血细胞凝集块形成时间(K)、血细胞凝集块形成速率(α角)、最大振幅(MA)、花生四烯酸(AA)途径抑制率、二磷酸腺苷(ADP)途径抑制率]、血小板凝集率。采用Pearson相关分析探讨CAA、ACI患者TEG-PM参数与血小板凝集率的相关性。结果CAA组、ACI组R、K短于对照组,α角、MA大于对照组,AA途径抑制率、ADP途径抑制率低于对照组,血小板凝集率高于对照组(P<0.05)。Pearson相关分析结果显示,CAA组、ACI组R、K、AA途径抑制率、ADP途径抑制率均与血小板凝集率呈负相关,α角、MA均与血小板凝集率呈正相关(P<0.05)。Ⅱ级亚组、Ⅲ级亚组、Ⅳ级亚组R短于Ⅰ级亚组,Ⅲ级亚组、Ⅳ级亚组R短于Ⅱ级亚组,Ⅳ级亚组R短于Ⅲ级亚组(P<0.05);Ⅲ级亚组、Ⅳ级亚组K短于Ⅰ级亚组,Ⅳ级亚组K短于Ⅱ级亚组(P<0.05);Ⅲ级亚组、Ⅳ级亚组MA大于Ⅰ级亚组,Ⅲ级亚组MA大于Ⅱ级亚组(P<0.05);Ⅱ级亚组、Ⅲ级亚组、Ⅳ级亚组AA途径抑制率低于Ⅰ级亚组,Ⅳ级亚组AA途径抑制率低于Ⅱ级亚组、Ⅲ级亚组(P<0.05);Ⅱ级亚组、Ⅲ级亚组、Ⅳ级亚组ADP途径抑制率低于Ⅰ级亚组,Ⅲ级亚组、Ⅳ级亚组ADP途径抑制率低于Ⅱ级亚组(P<0.05);Ⅲ级亚组、Ⅳ级亚组血小板凝集率高于Ⅰ级亚组,Ⅳ级亚组血小板凝集率高于Ⅱ级亚组(P<0.05)。中度亚组、重度亚组R短于轻度亚组,重度亚组R短于轻度亚组(P<0.05);重度亚组K短于轻度亚组、中度亚组,MA大于轻度亚组、中度亚组(P<0.05);中度亚组、重度亚组AA途径抑制率、ADP途径抑制率低于轻度亚组,重度亚组AA途径抑制率、ADP途径抑制率低于中度亚组(P<0.05);中度亚组、重度亚组血小板凝集率高于轻度亚组(P<0.05)。结论CAA、ACI患者TEG-PM参数中的R、K均缩短,α角、MA均增大,AA途径抑制率、ADP途径抑制率均降低,且血小板凝集功能均增强。此外,CAA、ACI患者TEG-PM参数中的R、K、AA途径抑制率、ADP途径抑制率均与血小板凝集功能呈负相关,α角、MA均与血小板凝集功能呈正相关。

关键词：冠状动脉疾病冠状动脉粥样硬化脑梗死血栓弹力图血小板图血小板凝集功能

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Ceramic membrane fouling mechanisms and control for water treatment

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Frontiers of Environmental Science & Engineering 2023年第10期17卷 103-117页

作者： cheng cai Wenjun Sun Siyuan He Yuanna Zhang Xuelin Wang School of Environmental Science&Engineering Tianjin UniversityTianjin 300072China School of Environment Tsinghua UniversityBeijing 100084China Research Institute for Environmental Innovation(Suzhou)Tsinghua Suzhou 215163China

Membrane separation, as an important drinking water treatment technology, has wide applications. The remarkable advantages of ceramic membranes, such as chemical stability, thermal stability, and high mechanical strength, endow them with broader prospects for development. Despite the importance and advantages of membrane separation in water treatment, the technique has a limitation: membrane fouling, which greatly lowers its effectiveness. This is caused by organics, inorganic substances, and microorganisms clogging the pore and polluting the membrane surface. The increase in membrane pollution greatly lowers purification effectiveness. Controlling membrane fouling is critical in ensuring the efficient and stable operation of ceramic membranes for water treatment. This review analyzes four mechanisms of ceramic membrane fouling, namely complete blocking, standard blocking, intermediate blocking, and cake filtration blocking. It evaluates the mechanisms underlying ceramic membrane fouling and summarizes the progress in approaches aimed at controlling it. These include ceramic membrane pretreatment, ceramic membrane surface modification, membrane cleaning, magnetization, ultrasonics, and nanobubbles. This review highlights the importance of optimizing ceramic membrane preparation through further research on membrane fouling and pre-membrane pretreatment mechanisms. In addition, combining process regulations with ceramic membranes as the core is an important research direction for ceramic membrane-based water treatment.

关键词： Ceramic membrane Fouling model Fouling control

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Electrochemical behavior of 304 stainless steel with electrodeposited niobium as PEMFC bipolar plates

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International Journal of Minerals,Metallurgy and Materials 2012年第4期19卷 328-332页

作者： cheng-hao Liang cai-hong Cao Nai-bao Huang Transportation Equipments and Ocean Engineering College Dalian Maritime University Dalian 116026 China

In order to enhance the corrosion resistance of 304 stainless steel, niobium was electrodeposited on its surface in air- and water-stable ionic liquids. The electrochemical behaviors of bare and niobium-coated 304 stainless steel were evaluated by electrochemical tests in a simulated proton exchange membrane fuel cell （PEMFC） environment. The results showed that niobium could be electrodeposited on the surface of 304 stainless steel from ionic liquids, and a smooth and strong chemical inert compound film was obtained on the surface of 304 stainless steel, which was mainly composed of NbO and Nb2Os. The thin composite film acted as a barrier and remarkably improved the corrosion resistance of 304 stainless steel in the PEMFC environment.

关键词： proton exchange membrane fuel cells electrodeposition niobium ionic liquids stainless steel corrosion resistance

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Hidden spin polarization in the 1T-phase layered transition-metal dichalcogenides MX_2(M = Zr, Hf; X = S, Se, Te)

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Science Bulletin 2018年第2期63卷 85-91页

作者： cai cheng Jia-Tao Sun Xiang-Rong Chen Sheng Meng Institute of Atomic and Molecular Physics College of Physical Science and Technology Sichuan University Institute of Physics Chinese Academy of Sciences

The recent discovery of hidden spin polarization emerging in layered materials of specific nonmagnetic crystal is a fascinating phenomenon, though hardly explored yet. Here, we have studied hidden spin tex- tures in layered nonmagnetic 1 T-phase transition-metal dichalcogenides MX2 （M = Zr, Hf; X = S, Se, Te） by using first-principles calculations. Spin-layer locking effect, namely, energy-degenerate opposite spins spatially separated in the top and bottom layer respectively, has been identified. In particular, the hidden spin polarization of 13-band can be easily probed, which is strongly affected by the strength of spin-orbit coupling. The hidden spin polarization of k-band locating at high symmetry M point （conduction band minimum） has a strong anisotropy. In the bilayer, the hidden spin polarization is preserved at the upmost Se layer, while being suppressed if the ZrSe2 layer is taken as the symmetry partner. Our results on hidden spin polarization in 1 T-phase dichalcogenides, verifiable by spin-resolved and angle-resolved photoemis- sion spectroscopy （ARPES）, enrich our understanding of spin physics and provide important clues to search for specific spin polarization in two dimensional materials for spintronic and quantum informa- tion applications.

关键词： Hidden spin polarizationTransition-metal dichalcogenides 1T-phaseHelical spin textureCentrosymmetric

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