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Research and development of 780 MPa cold rolling TRIP-aided steel

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International Journal of Minerals,Metallurgy and Materials 2009年第4期16卷 399-406页

作者： Qiang Liu Di tang hai-tao Jiang Ren-dong Liu Xiao-yong tang National Engineering Research Center for Advanced Rolling Technology University of Science and Technology Beijing Beijing 100083 China Researchand Development Center Anshan Iron and Steel （Group） Corp. Anshan 114001 Liaoning China

As an industry-university cooperative project, an experimental research was conducted to develop a new cold-rolled transformation-induced plasticity （TRIP） steel with a tensile strength of 780 MPa and an elongation of 25% under the conditions that some processing parameters were preestablished according to the actual conditions of factory production lines. The optimal heat treatment conditions for obtaining excellent strength-ductility balance, specifically in intercritical annealing temperature and isothermal treatment temperature, were investigated by means of thermal simulation tests. Ultimately the desirable mechanical properties were attained successfully, and the microstructure and retained austenite stability were studied by optical microscopy （OM） and electron back-scattered diffraction （EBSD）. It has been discovered that the sizes of retained austenite grains are generally proportional to the sizes of carbon-clear space （ferrite and bainite） around them, and there is marked selectivity in their transition sequences under stress-strain.

关键词： TRIP steel heat treatment retained austenite stability

Role of Conformational Entropy in Complex Macromolecular Systems

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Chemical Research in Chinese Universities 2023年第5期39卷 709-718页

作者： DAI Xiaobin WAN hai-Xiao ZHANG Xuanyu WEI Wenjie CHEN Wenlong ZHANG Longgui LI Juan yan Li-tang State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084P.R.China Beijing Research Institute of Chemical Industry SINOPECBeijing 100013P.R.China

Conformation is the key to revealing the physical characteristics of macromolecular systems and receives tremendous interest from the fields of polymer physics and biological *** conformational entropy,related to the number of conformations of the macromolecule,plays a predominant role in the structural formation,transition,and dynamics of macromolecular *** this review,we present a comprehensive overview of the research,development and applications of the conformational entropy in complex macromolecular *** begin by discussing the physical origin of the conformational entropy based on statistical mechanics of macromolecules in classical polymer physics,and then introduce the recent progress on the predictive modeling of the conformational entropy,associated with a variety of typical macromolecular ***,we also highlight several principles and rules,which have been harnessed to manipulate the structural organization of complex macromolecular systems through the conformational *** anticipate that this review will further promote fundamental research in polymer physics,and offer intriguing prospects for applications in complex macromolecular systems including biomacromolecules,grafted nanoparticles,and polymer nanocomposites.

关键词： Polymer conformation Entropy Stiffness External field Confinement

Analysis of optimal initial glide conditions for hypersonic glide vehicles

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Chinese Journal of Aeronautics 2014年第2期27卷 217-225页

作者： yan Xiaodong Lyu Shi tang Shuo School of Astronautics Northwestern Polytechnical University Science and Technology on Aerospace Flight Dynamics Laboratory

Hypersonic glide vehicles （HGVs） are launched by a solid booster and glide through the atmosphere at high speeds. HGVs will be important means for rapid long-range delivery in the future. Given that the glide is unpowered, the initial glide conditions （IGCs） are crucial for flight. This paper aims to find the optimal IGCs to improve the maneuverability and decrease the con- straints of HGVs. By considering the IGCs as experiment factors, we design an orthogonal table with three factors that have five levels each by using the orthogonal experimental design method. Thereafter, we apply the Gauss pseudospectral method to perform glide trajectory optimization by using each test of the orthogonal table as the initial condition. Based on the analytic hierarchy process, an integrated indicator is established to evaluate the IGCs, which synthesizes the indexes of the maneuverability and constraints. The integrated indicator is calculated from the trajectory opti- mization results. Finally, optimal IGCs and valuable conclusions are obtained by using range anal- ysis, variance analysis, and regression analysis on the integrated indicator.

关键词： Analytic hierarchy process Hypersonic glide vehicles Optimization Orthogonat experimentaldesign Trajectory

Specific staining and precise killing of cancer cells through fusion of pharmaceutical chemistry and π-bridge effect design philosophy

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Science China Chemistry 2025年

作者： Qiong Liu Qiyun Deng Changxu Zhu Kongqi Chen Lidan Chen Zhaohui Sun Ben Zhong tang Zhiming Wang AIE Institute Center for Aggregation-Induced Emission State Key Laboratory of Luminescent Materials and Devices Key Laboratory of Luminescence from Molecular Aggregates of Guangdong Province South China University of Technology Department of Laboratory Medicine General Hospital of Southern Theater Command School of Life Sciences The Chinese University of Hong Kong Shenzhen Institute of Aggregate Science and Technology School of Science and Engineering The Chinese University of Hong Kong HKUST-Shenzhen Research Institute

The development of an advanced phototheranostic platform that combines imaging and therapy in a single agent is an appealing yet challenging *** this study,we successfully constructed three novel fluorescent probes by leveraging pharmaceutical chemistry and the design philosophy of theπ-bridge *** a systematic comparative analysis of their fluorescence properties,water solubility,molecular conformation,and electrostatic potential,we revealed the fundamental principles governing the optical behavior and biological selectivity of these ***,the probe TPhIQ-CNTh demonstrated extended fluorescence in the near-infrared region,a significant aggregation-induced emission (AIE) effect,and the ability to distinguish tumor cells from normal ***,it efficiently generated reactive oxygen species (ROS) and specifically labeled lipid droplets,enabling the precise staining and killing of cancer *** study presents a practical strategy for designing precise tumor treatments that integrate efficient imaging-guided photodynamic therapy (PDT) by harnessing the unique properties of AIE materials.

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Electrochemically promoted N-heterocyclic carbene polymercatalyzed cycloaddition of aldehyde with isocyanide acetate

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Science China Chemistry 2022年第10期65卷 1873-1878页

作者： Chu-Hong Ou Ying-Ming Pan hai-Tao tang State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources School of Chemistry and Pharmaceutical Sciences of Guangxi Normal UniversityGuilin 541004China

N-heterocyclic carbene(NHC) is a potent organic small-molecule ***,its high synthetic price and frequent use in combination with excess oxidants have limited its utilization in industrial *** designed and synthesized a porous organic polymer with NHC as the core structure to solve the above *** catalytic performance of the polymer was tested in this *** polymer can successfully catalyze the cycloaddition reaction of aldehyde and ethyl isocyanoacetate under *** results showed that the polymer catalyst can be recycled and had higher catalytic activity than homogeneous *** developed catalytic system(organic electrochemistry and NHC polymer) solves the existing problems of NHC catalysis and provides a reference for the development of new green catalytic systems.

关键词： NHC catalysis electrochemistry heterogeneous catalysis cycloaddition

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Exoskeleton active assistance strategy for human muscle activation reduction during linear and circular walking

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Advances in Manufacturing 2024年第3期12卷 484-496页

作者： Wen-Tao Sheng Ke-Yao Liang hai-Bin tang School of Intelligent Manufacturing Nanjing University of Science and TechnologyNanjing210094People’s Republic of China School of Mechatronics Engineering Harbin Institute of TechnologyHarbin150001People’s Republic of China

The exoskeleton is employed to assist humans in various domains including military missions,rehabilitation,industrial operation,and activities of daily living(ADLs).Walking is a fundamental ADL,and exoskeletons are capable of reducing the activation and metabolism of lower extremity muscles through active assistance during *** improve the performance of active assistance strategy,this article proposes a framework using an active hip ***,it correlates to an already established Bayesian-based human gait recognition algorithm,with a particular focus on linear and circular walking within industrial and ADL *** theorizing this strategy for exoskeletons,this study further reveals,in part,the activation characteristics of human hip muscles for the instruction and regulation of active assistance duration and onset *** proposed active assistance strategy provides new insights for enhancing the performance of assistive robots and facilitating human robot interaction within the context of ADLs.

关键词： Human-robot interaction Hip exoskeleton Muscle activation Walking assistance

METHOD TO CALCULATE BENDING CENTER AND STRESS INTENSITY FACTORS OF CRACKED CYLINDER UNDER SAINT-VENANT BENDING

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Applied Mathematics and Mechanics(English Edition) 2001年第1期22卷 79-88页

作者： tang Pen-ji(汤任基) tang Xin-yan(汤昕燕) Department of Engineering Mechanics Shanghai Jiaotong University Shanghai 200030 P R China Agricultural Engineering College Nanjing Agricultural University Nanjing 210032 P R China

Using the single crack solution and the regular solution elf plane harmonic function, the problem of Saint-Venant bending of a cracked cylinder by a transverse force was reduced to solving two sets of integral equations and its general solution was then obtained. Based on the obtained solution, a method to calculate the bending center and the stress intensity factors of the cracked cylinger whose cross-section is not thin-walled, but of small torsion rigidity is proposed. Some numerical examples are given.

关键词： cracked cylinger Saint-Venant bending bending center stress intensity factors integral equation method

Model-driven path planning for robotic plasma cutting of branch pipe with single Y-groove based on pipe-rotating scheme

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Advances in Manufacturing 2024年第1期12卷 94-107页

作者： yan Liu Qiu tang Xin-Cheng Tian School of Control Science and Engineering Shandong UniversityJinan250061People’s Republic of China Engineering Research Center of Intelligent Unmanned System Ministry of EducationJinan250061People’s Republic of China School of Mechanical and Electronic Engineering Shandong Jianzhu UniversityJinan250101People’s Republic of China

The automatic cutting of intersecting pipes is a challenging task in *** improved automation and accuracy,this paper proposes a model-driven path planning approach for the robotic plasma cutting of a branch pipe with a single ***,it summarizes the intersection forms and introduces a dual-pipe intersection *** on this model,the moving three-plane structure(a description unit of the geometric characteristics of the intersecting curve)is constructed,and a geometric model of the branch pipe with a single Y-groove is ***,a novel mathematical model for plasma radius and taper compensation is ***,the compensation model and groove model are integrated by establishing movable ***,to prevent collisions between the plasma torch and workpiece,the torch height is planned and a branch pipe-rotating scheme is *** the established models and moving frames,the planned path description of cutting robot is provided in this novel *** accuracy of the proposed method is verified by simulations and robotic cutting experiments.

关键词： Automatic groove cutting of intersecting pipes Model-driven robot path planning Plasma beam radius and taper compensation

Production of p-rich nuclei with Z = 20-25 based on radioactive ion beams

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Nuclear Science and Techniques 2022年第5期33卷 30-38页

作者： Bing Li Na tang Yu-hai Zhang Feng-Shou Zhang Key Laboratory of Beam Technology of the Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Institute of Radiation Technology Beijing Academy of Science and TechnologyBeijing 100875China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of LanzhouLanzhou 730000China

Within the framework of isospin-dependent Boltzmann-Langevin model,the production cross sections of proton-rich nuclei with Z=20-25 are *** to the reaction results for different isospin of projectiles^(48)Ni,^(49)Ni,and^(50)Ni,proton-rich fragments tend to be more easily produced in reactions with the protonrich projectile^(48)*** production cross sections of the unknown nuclei in the vicinity of the projectile are sensitive to incident *** is observed that incident energy of 345 MeV/u is appropriate for producing proton-rich nuclei with Z=*** projectile fragmentation reactions based on the radioactive ion beam of48Ni at 345MeV/u,several unknown proton-rich nuclei near the proton drip line are generated in the *** these new nuclei are near-projectile elements near Z=*** production cross sections of the new nuclei^(34)Ca,37,38Sc,^(38)Ti,^(40,41,42)V,^(40,41)Cr,and^(42,43,44,45)Mn are in the range of ***,projectile fragmentation of radioactive ion beams of Ni is a potential method for generating new proton-rich nuclei with Z=20-25.

关键词： Production cross sections Radioactive ion beams Isospin-dependent Boltzmann-Langevin model