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Successive lag cluster consensus on multi-agent systems via delay-dependent impulsive control

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Chinese Physics B 2019年第5期28卷 38-47页

作者： Xiao-Fen Qiu yin-Xing zhang Ke-Zan Li School of Mathematics and Computing Science Guangxi Key Laboratory of Cryptography and Information SecurityGuilin University of Electronic Technology

We introduce a new consensus pattern, named a successive lag cluster consensus(SLCC), which is a generalized pattern of successive lag consensus(SLC). By applying delay-dependent impulsive control, the SLCC of first-order and second-order multi-agent systems is discussed. Furthermore, based on graph theory and stability theory, some sufficient conditions for the stability of SLCC on multi-agent systems are obtained. Finally, several numerical examples are given to verify the correctness of our theoretical results.

关键词： successive lag cluster consensus impulsive control multi-agent systems

Photocatalytic Carboxylation of Phenyl Halides with CO_(2) by Metal-Organic Frameworks Materials

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Chinese Journal of Chemistry 2021年第2期39卷 312-316页

作者： Lina Su yin zhang Xueying Qiu Jianyu Han Zhiyong Tang CAS Key Laboratory for Nanosystem and Hierarchy Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing100190 China School of Future Technology University of Chinese Academy of SciencesBeijing100049 China School of Materials Science and Engineering Harbin Institute of TechnologyHarbinHeilongjiang150080 China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing100049 China

In this work,important commercial pharmaceutical intermediates,phenylpropionic acid compounds,are successfully obtained by catalyzing the reaction of carbon dioxide with phenyl halides using MOF-5,a typical metal-organic framework(MOF)*** influence of temperature,pressure,catalyst type and light on the reaction is investigated,and a 90.3%selectivity towards fluorophenylpropionic acid is ***,the catalysts are effective for varied benzyl compounds containing different substituent *** catalysts are stable and remain active after three cycles.

关键词： Metal-organic frameworks Photocatalysis Carbon dioxide fixation Heterogeneous catalysis Ibruprofen

Changes in nitric oxide,angiotensinⅡ,angiopoietin-like protein 4 mRNA,neuregulin 1 mRNA,and platelet endothelial cell adhesion molecule-1 in rats with acute blood stasis induced by high-molecular-weight dextran

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Journal of Traditional Chinese Medicine 2017年第6期37卷 846-853页

作者： Feng Yu zhang Junxiu Li Shaodan Liu Yi zhang yin Guo Yunxia Yang Minghui Institute of Traditional Chinese Medicine Chinese People's Liberation Army General HospitalBeijing 100853China

OBJECTIVE: To investigate the influence of acute blood stasis on nitric oxide(NO), angiotensin Ⅱ(Ang Ⅱ), angiopoietin-like protein 4(ANGPTL4)m RNA, neuregulin 1(NRG-1) m RNA, and platelet endothelial cell adhesion molecule-1(PECAM-1) in rats with stasis induced by high-molecular-weight dextran(HMWD).METHODS: Seventy-five Sprague Dawley rats were divided randomly into five groups(n = 15 in each group): control group, immediate group, 1 h group,3 h group, and 6 h group. A model of acute blood stasis was established via injection of HMWD into the tail vein. After performing electrocardiogram at the predetermined times according to the grouping, we collected blood and cardiac samples for hematoxylin-eosin(HE) staining and histopathological examination via transmission electron microscopy. Enzyme-linked immunosorbent assay was used to detect plasma levels of NO, AngⅡ, and fibrinogen. Real-time polymerase chain reaction was used to detect the expression of ANGPTL4 m RNA and NRG-1 m RNA. Immunohistochemical methods were used to detect PECAM-1 protein ***: The rat model of blood stasis showed blood retention in the capillary lumens. The ST segment showed gradual elevation, and was still elevated at 3 and 6 h after induction of blood *** staining showed myocardial cell necrosis and dissolution after modeling, along with basement membrane rupture and mitochondrial structural damage. Transmission electron microscopy showed endothelial cell swelling and an increase in absorption vesicles immediately after modeling. Endothelial cell apoptosis was increased at 3 and 6 h after modeling. Cardiac muscle fibers were disordered and intercalated discs were blurred immediately after modeling. There were massive numbers of dissolved cardiac muscle fibers, ruptured basement membranes, and mitochondrial structural damage at 3 and 6 h after modeling. NO plasma concentration was significantly reduced immediately and 1 h after modeling, while it was increased at 3 and 6 h

关键词： Blood stasis Basic theory of TraditionalChinese Medicine Endothelial cells Angiotensin Ⅱ, Neuregulin-1 Antigens, CD31

Solitons and periodic waves for a generalized(3+1)-dimensional Kadomtsev-Petviashvili equation in fluid dynamics and plasma physics

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Communications in Theoretical Physics 2020年第11期72卷 30-36页

作者： Dong Wang Yi-Tian Gao Cui-Cui Ding Cai-yin zhang Ministry-of-Education Key Laboratory of Fluid Mechanics and National Laboratory for Computational Fluid Dynamics Beijing University of Aeronautics and AstronauticsBeijing 100191China

Under investigation in this paper is a generalized(3+1)-dimensional Kadomtsev-Petviashvili equation in fluid dynamics and plasma *** and one-periodic-wave solutions are obtained via the Hirota bilinear method and Hirota-Riemann *** and velocity of the one soliton are *** are presented to discuss the solitons and one-periodic waves:the coefficients in the equation can determine the velocity components of the one soliton,but cannot alter the soliton magnitude;the interaction between the two solitons is elastic;the coefficients in the equation can influence the periods and velocities of the periodic *** between the one-soliton solution and one-periodic wave solution is investigated.

关键词： fluid dynamics plasma physics generalized(3+1)-dimensional Kadomtsev-Petviashvili equation solitons periodic waves

Attaining synergetic equilibrium of electrical conductivity and tensile strength in GQDs@GN/Cu composites through multi-scale intragranular and intergranular reinforcements

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Rare Metals 2024年第1期43卷 366-379页

作者： Shuang-yin zhang Liang Liu Rui Bao Jian-Hong Yi Sheng-Da Guo Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China Key Laboratory of Advanced Materials of Yunnan Province Kunming University of Science and TechnologyKunming 650093China Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou 341000China

The configuration and quality of reinforcements, as well as the robustness of interfacial bonding,holding a critical significance in determining the concurrence between electrical conductivity and mechanical strength in metal matrix composites. In this study, citric acid was employed as the precursor for synthesizing multiscale carbon nanomaterials(graphene quantum dots and graphene, abbreviated as GQDs and GN). The GQDs@GN/Cu composites were fabricated through a segmented ball milling process in conjunction with subsequent spark plasma sintering(SPS). The intragranular GQDs and intergranular GQDs@GN had synergistically reinforced Cu composites through Orowan strengthening, load transfer strengthening and refinement strengthening. Furthermore,the robust interface bonding between GQDs@GN and Cu effectively mitigated interfacial impedance stemming from electron-boundary scattering. The yield strength and ultimate tensile strength of the GQDs@GN/Cu composites were recorded as 270 and 314 MPa, respectively, representing an improvement of 92 and 28% over pure Cu, while maintaining electrical conductivity at a level comparable to that of pure Cu. This study advances the understanding of the possibility of realizing a synergistic compatibility between electrical conductivity and mechanical strength in Cu composites.

关键词： Cu matrix composites Interface bonding Mechanical property Graphene quantum dots(GQDs) Electrical conductivity

HYDRODYNAMICS STABILITY OF BICKLEY JET WITH PARTICLE LADEN FLOW

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Journal of Hydrodynamics 2009年第5期21卷 608-613页

作者： XIE Ming-liang ZHOU Huai-chun zhang yin-di State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan 430074 China

The stability of Bickley jet with particle laden flow is investigated numerically. The stability characteristics are calculated for various Stokes numbers and particle concentrations. The results confirm the author＇s early calculations, which also shows that the numerical program is reliable. It is further shown that there is a critical value for the effect of Stokes number, which is about 2. The most damped mode occurs when Stokes number is of order of 10 for different particle concentrations and depends weakly on the wave number. The difference in the eigenfunctions and its derivatives between the particle-laden flow and the clean gas flow is insignificant for fine particles, while the difference for coarse particles is significant.

关键词： hydrodynamic stability Bickley jet particle laden flow two-way coupled Chebyshev spectral method

Evolution of thermo-physical properties of diamond/Cu composite materials under thermal shock load

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Rare Metals 2014年第2期33卷 185-190页

作者： Hong Guo Zhi-Hui Bai Xi-Min zhang Fa-zhang yin Cheng-Chang Jia Yuan-Yuan Han School of Materials and Engineering University of Science &Technology Beijing National Engineering Technology Research Center for Nonferrous Metals Composites Beijing General Research Institute for Nonferrous Metals

In this paper, the two-flume method was used to study the change laws of the thermal conductivity and thermal expansion coefficient of diamond/Cu composite materials with 100, 300, and 500 cycle numbers, under the action of thermal shock load between-196 and 85 °C; the X-ray diffraction method（XRD） was used to study the change of the residual stress in the thermal shock process of the diamond/Cu composite materials; and the evolution of the fracture microstructure with different thermal shock cycle numbers was observed through scanning electron microscopy（SEM）. The results of the study show that the increase of the binder residue at the interface reduces the thermal shock stability of the diamond/Cu composite materials. In addition, under the thermal shock load between-196 and 85 °C, the residual stress of the diamond/Cu composite materials increases continuously with the increase of the cycle numbers, the increase of residual stress leads to a small amount of interface debonding, an increase of the interfacial thermal resistances, and a decrease of the constraints of low-expansion component on material deformation, thus the thermal conductivity decreases slightly and the thermal expansion coefficient increases slightly.

关键词： Diamond/Cu Thermal shock Thermal conductivity Thermal expansion coefficient Residual stress

Pharmacological actions of miltirone in the modulation of platelet function

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中国药理学与毒理学杂志 2018年第4期32卷 252-253页

作者： zhang-yin MING Wei SONG Department of Pharmacology School of Basic Medicine Tongji Medical College of Huazhong University of Science and Technology Wuhan 430030 China The Key Laboratory for DrugTarget Research and Pharmacodynamic Evaluation of Hubei Province Wuhan 430

OBJECTIVE Salvia miltiorrhiza bunge contains various active constituents,some of which have been developed as commercially available ***,some other ingredients in Salvia miltiorrhiza play great roles in anti-platelet *** aim of the present study was to investigate the effects and the underlying mechanism of miltirone,a lipophilic compound of Salvia miltiorrhiza *** The ability of miltirone to modulate platelet function was investigated by a variety of in vitro and in vivo *** aggregation and dense granule secretion induced by various agonists were measured with platelet *** retraction and spreading were imaged by digital camera and fl uorescence *** chloride-induced carotid injury model and pulmonary thromboembolism model were used to check miltirone effect in *** elucidate the mechanisms of anti-platelet activity of miltirone,flow cytometry and Western blotting were *** Miltirone(2,4,8 μmol·L^(-1)) was shown to suppress platelet aggregation,dense granule and α granule secretion in a dose-dependent ***,miltirone inhibited the clot retraction and spreading of washed *** reduced the phosphorylation of PLCγ2,PKC,Akt,GSK3β and ERK1/2 in the downstream signal pathway of collagen *** also reduced the phosphorylation of Src and FAK in the integrin αⅡbβ3 mediated "outside-in" signaling,while it did not suppress the phosphorylation of β*** addition,miltirone prolonged the occlusion time and reduced collagen/epinephrine induced pulmonary *** Miltirone suppresses platelet "inside-out" and "outside-in" signaling by affecting PLCγ2/PKC/ERK1/2,PI3K/Akt and Src/FAK ***,miltirone might represent a potential anti-platelet candidate for the prevention of thrombotic disorders.

关键词：丹参速效药治疗方法临床分析

Polydopamine/polyethyleneimine co-crosslinked graphene oxide for the enhanced tribological performance of epoxy resin coatings

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Journal of Materials Science & Technology 2023年第5期136卷 13-20页

作者： Shaofeng Zhou Jin Yan Jialin Chen Huimin Yan yin zhang Jin Huang Guizhe Zhao Qiaoxin zhang Yaqing Liu Shanxi Province Key Laboratory of Functional Nanocomposites and School of Materials Science and EngineeringNorth University of ChinaTaiyuan 030051China School of Mechanical and Electronic Engineering Wuhan University of TechnologyWuhan 430070China Queen Marry University of London Engineering School Northwestern Polytechnical UniversityXi’an 710129China Southwest Technology and Engineering Research Institute Chongqing 400039China School of Chemistry and Chemical Engineering and Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function ManufacturingSouthwest UniversityChongqing 400715China

To enhance the wear resistance of graphene oxide(GO)nano-filled epoxy resin(EP)coatings with ex-cellent dispersion,GO were modified using a co-crosslinking strategy between polydopamine(PDA)and polyethyleneimine(PEI)through an environmentally friendly,simple and low-cost ***-density amino-branched PEI and highly adhesive PDA formed covalent bond cross-links with GO(PDA/PEI-GO)through the Michael addition and Schiffbase *** the introduction of amino active sites,the PDA self-polymerization reaction time was significantly shorted from 24 to 6 *** covalently cross-linked network increased the lamellar spacing of GO and enhanced the interfacial bonds between the PDA/PEI-GO lamellae and EP *** to the improved dispersion and surface activity of GO,the PDA/PEI-GO nano-filled EP coating exhibited excellent wear *** friction with GCr15 stainless steel ball,the average friction coefficient and wear rate of the coating were reduced by 31.9%and 62.7%,respectively,compared to the pure EP *** addition,the wear mechanism of the PDA/PEI-GO/EP coating changed from adhesive and fatigue wear to abrasive wear,and it maintained good wear resistance by forming a GO lubrication transfer film on the counterpart ***,this study may provide a new strategy for improving the dispersion of graphene in wear-resistant polymer materials for practical applications.

关键词： Graphene oxide Co-crosslinking Epoxy coatings Tribological properties