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GEOCHEMICAL CHARACTERISTICS OF GRANITES AND ITS STRUCTURAL GENETIC ENVIRONMENT IN THE NANDAN-HECHI METALLOGENETIC BELT, NORTHWEST GUANGXI

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Geotectonica et Metallogenia 2004年第2期28卷 128-141页

作者： CAI Minghai LIANG Ting WU Decheng HUANG Huimin Yichang Institute of Geology and Minerals Yichang Hubei443003China liuzhou Huaxi co. Ltd. Liuzhou Guangxi 545006China Department of Geology and Mineral Resources Chang''an University Xi''an Shanxi710054China Liuzhou Huaxi Co. Ltd. Liuzhou Guangxi 545006China Liuzhou Huaxi Co. Ltd. Liuzhou Guangxi 545006China

The Nandan-Hechi metallogenetic belt is the most important tin-polymetallic producing district in China, and is the location of the Dachang super-large tin deposit. Based on the detailed field investigation and isotopic data, the stages of magmatic activity in the Nandan-Hechi metallogenetic belt have been lined out in this paper. Through the study about the geochemical characteristics of different granites, and by using ω(Al2O3)-ω(SiO2), ω(TFeO)/[ω(TFeO)+ω(MgO)]-ω(SiO2), AFM, ACF and Rb-Yb+Ta, Rb-Y+Nb, Ta-Yb, Nb-Y discrimination diagrams in co.bination with regional geological setting analysis, the authors carried out analyses about the structural environment for the formation of the granites, and discussed the structural environment and dynamic setting for the large scale mineralization in this area. Our study indicates that the majority of the granites in Nandan-Hechi metallogenetic belt belong to the POG type, while the later stage alaskite belongs to the RRG+CEUG type. The granites were formed at the stage of structural transformation from postorogenic phase to intraplate setting. But the major structural environment is characterized by steady regional extension. The formation age for the granites co.ncides with the time for this transformation, and this translation environment is favored for large-scale metallogenesis.

关键词： granite geochemistry structural environment Nandan-Hechi metallogenetic belt northwest Guangxi

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Mechanism of localized severe plastic deformation and damage fracture in fine-blanking using mixed displacement and pressure FEM

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中国有色金属学会会刊：英文版 2006年第5期16卷 1021-1028页

作者：谢晓龙赵震虞松谷胜光陈军李明辉 National Die and Mold CAD Engineering Research Center Shanghai Jiao Tong University Suzhou dongfeng Fine-blanking Engineering co.Ltd

A mixed displacement-pressure updated Lagrange FEM was used to simulate the severe plastic deformation, which can overco.e shear locking and volume locking. Together with adaptive remeshing technique based on strain gradient and surface curvature, the strain localization in severe plastic deformation can be captured. Schiffmann damage density was used to predict the developments of damage and fracture in sheet metal. The intensive dislocation and slip appear under the action of severe shear deformation, and metallic grains are flattened and elongated in shear band. Because of the existence of large radius of die edge, the flow direction of grains changes, and the grains are elongated and simultaneous. As a result, it is not easy to cut the grains off, and outer surfaces with clean cut are formed.

关键词：粉冲裁损伤有限元适应重啮合塑性变形混合位错

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Research on the Optimization Method of Body Torsional Stiffness Base on Flexible Joint Simplified Model

Research on the Optimization Method of Body Torsional Stiffn...

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2019中国汽车工程学会年会

作者： Huang Chengjie Di Shusheng Zhao Xuemei Zhang Dan Zhao Zhixin Wang Changchu dongfeng-Nissan Technology Center Dongfeng Motor Co.Ltd.

Aiming at the problem of fast and accurate prediction of torsional stiffness of vehicle body,an optimization method based on the simplified model of flexible joint is ***,a simplified model of flexible joint is established by using mathematical model and simulation analysis *** this basis,an accurate and reliable whole vehicle wire frame model is established by co.bining with flexible joint and beam *** the task of new vehicle development,two joints which need to be optimized are positioned quickly by using the model and sensitivity *** then,orthogonal test is designed to calculate the optimization degree of joint stiffness under the optimal co.t and weight *** results show that the optimization method based on the simplified model of flexible joints improves the torsional stiffness of the vehicle body by 17%,reduces the co.t of co.ponents by 12%,and reduces the weight by 0.5 kg co.pared with the traditional method,which achieves the effect of improving the quality and reducing the co.t.

关键词： flexible joint torsional stiffness sensitivity analysis orthogonal experiment

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Study and Practice on the Architecture Design of Electrified Vehicle Platforms

Study and Practice on the Architecture Design of Electrified...

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2023中国汽车工程学会年会暨展览会

作者： Sun Qi Yu Heng Cheng Kang Ye Xiaoming Song Fabao dongfeng Motor co. Ltd.

The fundamental significance of the architecture of a vehicle platform was studied and practiced in this *** architecture to determine different kinds of modular platforms was an effective means,and also put forward new proposals for their *** on benchmarking and development experiences of passenger vehicle modular platforms,the co.cept and characteristics of a vehicle platform architecture was proposed in this *** analyzing the evolution process and development strategy of modular platforms for fuel engines,hybrid powertrains and battery electric vehicle platforms,the internal motivations for the co.struction of the platform was *** elements and methods of platform architecture design were summarized,such as primary parameters,modules,interfaces,principles,*** has reference significance for the architecture development of brand-new platforms and vehicle models in the future.

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Engine Mount Stopper Abnormal Noise Analytical Method and Solution

Engine Mount Stopper Abnormal Noise Analytical Method and So...

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2023中国汽车工程学会年会暨展览会

作者： Ye Jinquan Jiang Yanqing Gao Baishi Dai Rui dongfeng motor co. Ltd.Dongfeng Nissan Technical Center

Acco.ding to solve three different types of engine mount stopper noise or abnormal vibration problem,including assembly issue,Y direction stopper issue and X direction stopper issue,detailed description the analysis process,co.ntermeasure and verification of noise or abnormal vibration due to stopper or stopper poordesign,then summarize the analytical method and solution of engine mount stopper issue,the analytical method and solution in this paper can also as reference for the other abnormal noise in chassis.

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Freeze-thaw Durability of Recycled Aggregate co.crete:An Overview

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Journal of Wuhan University of Technology(Materials Science) 2021年第1期36卷 58-69页

作者： LUAN Haoxiang WU Jin PAN Jiayu Department of Civil Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China co.lege of Civil and Architecture Guangxi University of Science and TechnologyLiuzhou 545006China Jiangsu Huangjiang co.struction Group co. Ltd.Yangzhou 225200China

The characteristics of surface appearances,mass loss,relative dynamic modulus of elasticity and strength loss of different recycled aggregate co.cretes(RAC) exposed to freeze-thaw cycles were *** was found that the freeze-thaw resistance of RAC co.ld be determined by the recycled aggregate co.positions and *** the saturation degree and the air void structure were the key factors influencing the freeze-thaw damage on *** major proposed freeze-thaw deterioration mechanisms were utilized to interpret the freeze-thaw damage on recycled aggregate ***,some potential measures to enhance the freeze-thaw resistance of co.crete were summarized and discussed.

关键词： recycled aggregate co.crete freeze-thaw durability aggregate co.position deterioration mechanism improvement measures

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维普期刊数据库

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A review on WO_(3)-based co.posite photocatalysts:synthesis,catalytic mechanism and diversified applications

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Rare Metals 2024年第8期43卷 3441-3459页

作者： Xue Zhang Zi-Qi Zhang Yan-Dong Sun Xiao-Jia Ma Feng-Xian Jin Fang-Yuan Zhang Wei-Guang Han Bo-Xiong Shen Sheng-Qi Guo co.lege of Energy and Environmental Engineering Hebei University of TechnologyTianjin 300401China Department of Food and Chemical Engineering Liuzhou Institute of TechnologyLiuzhou 545616China

Photocatalysis as an emerging "green" energy co.version technology has attracted domestic and international *** technology uses semico.ductor photocatalysts to co.vert solar energy into directly usable chemical energy,showing great potential for application in environmental pollutant purification and clean energy production,with broad development *** many semico.ductor materials,tungsten trioxide(WO_(3)) is favored by researchers in the field of photocatalysis because of its good visible light response and excellent valence band hole oxidation ***,a large number of photocatalysts based on WO_(3),in particular W03-based co.posite photocatalysts,have been reported,and their applications co.er a wide range of *** order to promote the development of WO_(3)-based photocatalysts and provide a reference for co.leagues,we present a systematic summary of the applications and research progress of W03-based co.posites in the field of photocatalysis in recent *** from the structural properties of WO_(3)itself,this article summarizes the preparation methods and structure-activity relationships of WO_(3)-based co.posite ***,it introduces the current application status of existing WO_(3)-based co.posite photocatalysts in co.(2) reduction,hydrogen production,nitrogen fixation,and pollutant ***,the development prospects were analyzed.

关键词： WO_(3)-based co.posite photocatalysts Intrinsic characteristic Preparation method Reaction mechanism Applications

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Research on an Thermal Management System and its co.trol Strategy for Electric Vehicles

Research on an Thermal Management System and its Control Str...

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2020中国汽车工程学会年会暨展览会

作者： Shang Xuanqing Ma Xu Zhang Chunqiu Li Yonggang Xu Zhenpeng dongfeng Motor co. Ltd.Dongfeng Nissan Passenger Vehicle Company

As the demand for EV’s range increasing,the energy density of power battery is getting higher than before,and the thermal management of battery is beco.ing more and more *** article introduces a kind of management system of A/C and battery thermal,and how it *** addition,the co.trol strategies and parameter settings of co.e co.ponents are *** system and co.trol strategy have been experimentally verified and practically applied to certain electric *** results prove that the liquid-co.led co.trol system and its co.trol strategy described in this paper can well meet the co.fort requirements of the passenger *** it can provide a suitable charging and discharging temperature environment for the power battery.

关键词： electric vehicles battery thermal management e-co.pressor PTC EXV

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End-to-End Joint Multi-Object Detection and Tracking for Intelligent Transportation Systems

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Chinese Journal of Mechanical Engineering 2023年第5期36卷 280-290页

作者： Qing Xu Xuewu Lin Mengchi Cai Yu‑ang Guo Chuang Zhang Kai Li Keqiang Li Jianqiang Wang Dongpu Cao School of Vehicle and Mobility Tsinghua UniversityBeijing 100084China Horizon Information Technology co. Ltd.Beijing 100096China School of Transportation Science and Engineering Beihang UniversityBeijing 100191China dongfeng USharing Technology co. Ltd.Wuhan 430000China Department of Mechanical and Mechatronics Engineering University of WaterlooWaterlooON N2L 3G1Canada

Environment perception is one of the most critical technology of intelligent transportation systems(ITS).Motion interaction between multiple vehicles in ITS makes it important to perform multi-object tracking(MOT).However,most existing MOT algorithms follow the tracking-by-detection framework,which separates detection and tracking into two independent segments and limit the global ***,a few algorithms have co.bined feature extraction into one network;however,the tracking portion co.tinues to rely on data association,and requires co.‑plex post-processing for life cycle *** methods do not co.bine detection and tracking *** paper presents a novel network to realize joint multi-object detection and tracking in an end-to-end manner for ITS,named as global co.relation network(GCNet).Unlike most object detection methods,GCNet introduces a global co.relation layer for regression of absolute size and co.rdinates of bounding boxes,instead of ofsetting *** pipeline of detection and tracking in GCNet is co.ceptually simple,and does not require co.pli‑cated tracking strategies such as non-maximum suppression and data *** was evaluated on a multivehicle tracking dataset,UA-DETRAC,demonstrating promising performance co.pared to state-of-the-art detectors and trackers.

关键词： Intelligent transportation systems Joint detection and tracking Global co.relation network End-to-end tracking

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Study on C-IASI Roof Crush Performance Based on Orthogonal Test Method

Study on C-IASI Roof Crush Performance Based on Orthogonal T...

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2020中国汽车工程学会年会暨展览会

作者： Pan Zhihong Song Jinhua Liu Kang Mao Ling Hu Hao Jiang Zhonghai Lu Caifa dongfeng Motor co. Ltd.Dongfeng Nissan Passenger Vehicle Company

Based on the actual test and simulation result,the paper selects 4 key factors like front windshield thickness,glass adhesive width,A pillar section structure with body side,and A pillar inner panel thickness from the view of vehicle *** means of orthogonal test with 4 factors and 3 levels,the sensitive influence factors were found through only few ***,the targeted optimization design was performed and the roof crush performance was effectively improved,providing guidance for practical engineering problems.

关键词： C-IASI roof crush orthogonal test optimization design

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