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Editorial

The Journal of China Universities of Posts and Telecommunications 2024年第2期31卷 1-2页

作者： zhang jie Beijing University of Posts and Telecommunications Beijing 100876China

Integrated circuits(ICs)have become the cornerstone of the information age,driving scientific and technological revolutions and symbolizing strategic national *** the continuous adjustment of economic structure and the changing of international relationships,the pivotal role of ICs and related sectors has become increasingly *** address Chinese critical“bottleneck”challenges in this domain,it is necessary to strengthen the research on semiconductor devices,IC design,and manufacturing technologies.

关键词： corners driving symbol

Cachazo-Svrcek-Witten rules for tree-level gluonic amplitudes revisited

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Science China(Physics,Mechanics & Astronomy) 2022年第4期65卷 20-31页

作者： Wen-jie zhang Jun-Bao Wu Chuan-jie Zhu Center for Joint Quantum Studies and Department of Physics School of ScienceTianjin UniversityTianjin 300350China Peng Huanwu Center for Fundamental Theory Hefei 230026China College of Mathematics and Physics Science Hunan University of Arts and ScienceChangde 415000China

We provide a new proof of Cachazo-Svrcek-Witten rules for tree-level gluonic *** a key step,we explicitly demonstrate the cancellation of spurious poles originating from the maximally helicity violating vertices in these *** achieve this,we introduce specially-defined two-off-shell-line sub-amplitudes and examine their residues at spurious poles.

关键词： general properties of perturbation theory perturbative calculations dualities in gauge field theories

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H7N9 avian influenza with first manifestation of occipital neuralgia:A case report

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World Journal of Clinical Cases 2023年第2期11卷 434-440页

作者： jie zhang Department of Neurology Neuromedical CenterAviation General HospitalBeijing 100012China

BACKGROUND Most of the first symptoms of avian influenza are respiratory symptoms,and cases with occipital neuralgia as the first manifestation are rarely *** SUMMARY A middle-aged patient complaining of paroxysmal pain behind the ear was admitted to our *** patient’s condition changed rapidly,and high fever,unexpected respiratory failure,and multiple organ failure developed *** patient was diagnosed with H7N9 avian influenza based on *** We believe that the etiology of occipital neuralgia is complex and could be the earliest manifestation of severe *** possibility of an infectious disease should be considered when occipital neuralgia is accompanied by *** influenza is one of these causative agents.

关键词： Occipital neuralgia Avian influenza Respiratory Infectious Case report

Interfacial bonding characteristics and mechanical properties of H68/AZ31B clad plate

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International Journal of Minerals,Metallurgy and Materials 2022年第6期29卷 1237-1248页

作者： Tingting zhang Wenxian Wang jie zhang Zhifeng Yan Advanced Forming and Intelligent Equipment Research Institute Taiyuan University of TechnologyTaiyuan 030024China College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan 030024China Shanxi Key Laboratory of Advanced Magnesium-based Materials Taiyuan 030024China

Interfacial bonding,microstructures,and mechanical properties of an explosively-welded H68/AZ31B clad plate were systematically *** to the results,the bonding interface demonstrated a“wavy-like”structure containing three typical zones/layers:(1)diffusion layer adjacent to the H68 brass plate;(2)solidification layer of melted metals at the interface;(3)a layer at the side of AZ31B alloy that experienced severe *** copper,CuZn_(2),andα-Mg phases were observed in the melted-solidification *** polygonal grains with twins were found at the H68 alloy side,while fine equiaxed grains were found at the AZ31B alloy side near the interface due to *** results revealed the formation of brittle intermetallic CuZn_(2) phases at the bonding *** interface was bonded well through metallurgical reactions due to diffusion of Cu,Zn,and Mg atoms across the interface and metallurgic reaction of partially melted H68 and AZ31B alloys.

关键词： explosive welding interfacial bonding numerical simulation nanoindentation dissimilar metal composite

Interfacial Morphology and Bonding Mechanism of Explosive Weld Joints

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Chinese Journal of Mechanical Engineering 2021年第2期34卷 201-212页

作者： Tingting zhang Wenxian Wang Zhifeng Yan jie zhang Advanced Forming and Intelligent Equipment Research Institute Taiyuan University of TechnologyTaiyuan 030024China College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

Interfacial structure greatly affects the mechanical properties of laminated ***,the critical material properties that impact the interfacial morphology,appearance,and associated bonding mechanism of explosive welded plates are still *** this paper,the same base plate(AZ31B alloy)and different flyer metals(aluminum alloy,copper,and stainless steel)were used to investigate interfacial morphology and *** and TEM results showed that typical sine wave,wave-like,and half-wave-like interfaces were found at the bonding interfaces of Al/Mg,Cu/Mg and SS/Mg clad plates,*** different interfacial morphologies were mainly due to the differences in hardness and yield strength between the flyer and base *** results of the microstructural distribution at the bonding interface indicated metallurgical bonding,instead of the commonly believed solid-state bonding,in the explosive welded clad *** addition,the shear strength of the bonding interface of the explosive welded Al/Mg,Cu/Mg and SS/Mg clad plates can reach up to 201.2 MPa,147.8 MPa,and 128.4 MPa,*** proposed research provides the design basis for laminated composite metal plates fabrication by explosive welding technology.

关键词： Interfacial structure Bonding mechanism Explosive welding Metallurgical bonding Magnesium alloy

A high-safety active/passive hybrid control approach for compressor surge based on nonlinear model predictive control

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Chinese Journal of Aeronautics 2023年第1期36卷 396-412页

作者： Hanlin SHENG Qian CHEN jie zhang Tianhong zhang Jiangsu Province Key Laboratory of Aerospace Power System College of Energy and Power EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China

Surge active control can expand the stable operating range of the ***,the difficulty of flow measurement,dynamic uncertainty disturbance,actuator delay characteristics,hard constraints of control variable,and system security measures have not been fully considered in the existing active control system,which significantly hinders its engineering ***,a nonlinear model predictive surge active control method is first presented based on flow estimator designed by using a continuous-time Kalman filter for dealing with the hard constraint of control variable and the impact of actuator delay of compression system with dynamic ***,a high-safety active/surge passive hybrid control strategy is designed,dominated by the surge active control and supplemented by the surge passive control,to ensure the compression system’s safe and stable ***,the simulation results suggest that the flow estimator accurately estimates the compressor *** considering the delay impact of the actuators and sensors and measurement noise on the system,the proposed method exhibits stronger robustness than the existing *** active/surge passive hybrid control strategy can successfully ensure the compression system’s safe and stable *** paper is of high practical significance for the engineering application of future compressor surge active control technologies.

关键词： Active control Compressor surge Flow estimator Hybrid system Model predictive control

Modeling and parameter identification of linear time-varying systems based on adaptive chirplet transform under random excitation

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Chinese Journal of Aeronautics 2021年第4期34卷 56-66页

作者： jie zhang Zhiyu SHI Lirong LI State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China Shanghai Aircraft Customer Service Co. Ltd.Shanghai 200241China

In this paper,a time–frequency algorithm based on adaptive chirplet transform for parameter modeling and identification of Linear Time-Varying(LTV)systems under random excitation is *** is assumed that the solution of responses of LTV structures is expressed as the sum of multicomponent Linear Frequency Modulated(LFM)signals in a *** the measured acceleration response is used to perform the adaptive chirplet transform,in which an integral algorithm is employed to reconstruct the velocity and displacement *** vibration differential equation with time-varying coefficients is transformed into a simple linear ***,for systems under random excitation,the input–output relation based on correlation function is also derived to estimate the parameters including physicals parameters and instantaneous modal *** full procedure of the method is presented and validated by using simulated *** results show that the presented method is accurate and robust for various LTV systems under random excitation.

关键词： Acceleration response Chirplet transform LTV systems Random excitation System parameter identification

Online temperature estimation of Shell coal gasification process based on extended Kalman filter

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Chinese Journal of Chemical Engineering 2022年第7期35卷 134-144页

作者： Kangcheng Wang jie zhang Dexian Huang Department of Automation Beijing National Research Center for Information Science and TechnologyTsinghua UniversityBeijing 100084China School of Engineering Merz CourtNewcastle UniversityNewcastle upon Tyne NE17RUUnited Kingdom

Obtaining the temperature inside the gasifier of a Shell coal gasification process(SCGP)in real-time is very important for safe process ***,this temperature cannot be measured directly due to the harsh operating *** this temperature using the extended Kalman filter(EKF)based on a simplified mechanistic model is proposed in this *** gasifier is partitioned into three *** quench pipe and the transfer duct are seen as two additional zones.A simplified mechanistic model is developed in each zone and formulated as a state-space *** temperature in each zone is estimated by the EKF in *** proposed method is applied to an industrial SCGP and the effectiveness of the estimated temperatures is verified by a process variable both qualitatively and *** prediction capability of the simplified mechanistic model is *** effectiveness of the proposed method is further verified by comparing it to a Kalman filter-based single-zone temperature estimation method.

关键词： Shell coalgasificationprocess Mechanistic modeling Temperature estimation Extended Kalmanfilter

Seismic response of large-span spatial structures under multi-support and multidimensional excitations including rotational components

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Earthquake Engineering and Engineering Vibration 2021年第1期20卷 141-159页

作者： zhang jie Li Hongnan Li Chao State Key Laboratory of Coastal and Offshore Engineering Faculty of Infrastructure EngineeringDalian University of TechnologyDalian 116024China School of Civil Engineering Shenyang Jianzhu UniversityShenyang 110168China

To achieve rational and precise seismic response predictions of large span spatial structures(LSSSs),the inherent non-uniformity and multidimensionality characteristics of earthquake ground motions should be properly taken into ***,due to the limitations of available earthquake stations to record seismic rotational components,the effects of rocking and torsional earthquake components are commonly neglected in the seismic analyses of *** this study,a newly developed method to extract the rocking and torsion components at any point along the area of a deployed dense array from the translational earthquake recordings is applied to obtain the rotational seismic inputs for a *** numerical model of an actual LSSS,the Dalian International Conference Center(DICC),is developed to study the influences of multi-support and multidimensional excitations on the seismic responses of *** numerical results reveal that the non-uniformity and multidimensionality of ground motion input can considerably affect the dynamic response of the *** specific degree of influence on the overall and local structural displacements,deformations and forces are comprehensively investigated and discussed.

关键词： large-span spatial structures seismic responses multi-support multidimensional rotational components