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dynamic process of trace boron non-equilibrium grain boundary segregation and the effect of cooling rate

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Journal of University of Science and Technology Beijing 2003年第3期10卷 30-34页

作者： PingWu XinlaiHe BingCao SenChen MaterialScienceandEngineeringSchool UniversityofScienceandTechnologyBeijingBeijing100083China EditorialDepartmentofJ.Univ.Sci.Technol.Beijing Beijing100083China AppliedScienceSchool UniversityofScienceandTechnologyBeijingBeijing100083China

The dynamic process of non-equilibrium grain boundary segregation of traceboron in Fe-40 percent Ni alloy during cooling and the effect of cooling rate were investigated byboron tracking autoradiography technique. The results indicate that during cooling process, theamount of segregated boron on grain boundary firstly increases fast, then enters a comparativelyeven increasing stage and increases rapidly again at the third stage. The details of each stagevaried with cooling rate are explained. When the segregation develops to a certain degree, thesegregated boron atoms transform from solute status to precipitate status.

关键词： boron grain boundary non-equilibrium segregation dynamic process

Numerical investigations on dynamic process of muzzle flow

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Applied Mathematics and Mechanics(English Edition) 2008年第3期29卷 351-360页

作者：姜孝海范宝春李鸿志 National Key Laboratroy of Transient Physics Nanjing University of Science and Technology

The integrative process of a quiescent projectile accelerated by high-pressure gas to shoot out at a supersonic speed and beyond the range of a precursor flow field was simulated numerically. The calculation was based on ALE equations and a second-order precision Roe method that adopted chimera grids and a dynamic mesh. From the predicted results, the coupling and interaction among the precursor flow field, propellant gas flow field and high-speed projectile were discussed in detail. The shock-vortex interaction, shockwave reflection, shock-projectile interaction with shock diffraction, and shock focus were clearly demonstrated to explain the effect on the acceleration of the projectile.

关键词： gasdynamics numerical simulation muzzle flow dynamic process

On the Kinematic Characteristics and dynamic process of Boundary faults of the Nansha Ultra-crust Layer-Block

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Acta Geologica Sinica(English Edition) 1999年第4期73卷 452-463页

作者： LIU Hailing SUN Yan GUO Lingzhi SHU Liangshu YANG Shukang ZHOU Di ZHANG Yixiang Earth Science Department Nanjing University Nanjing 210093 Open Lab of Geology and Palaeoenvironment of Marginal Seas South China Sea Institute of Oceanology Academia Sinica Guangzhou

Abstract The Nansha ultra-crust layer-block is confined by ultra-crustal boundary faults of distinctive features, bordering the Kangtai-Shuangzi-Xiongnan extensional faulted zone on the north, the Baxian-Baram-Yoca-Cuyo nappe faulted zone on the south, the Wan'an-Natuna strike-slip tensional faulted zone on the west and the Mondoro-Panay strike-slip compressive faulted zone on the east. These faults take the top of the Nansha asthenosphere as their common detachmental surface. The Cenozoic dynamic process of the ultra-crust layer-block can be divided into four stages: K2-E21, during which the northern boundary faults extended, this ultra-crust layer-block was separated from the South China-Indosinian continental margin, the Palaeo-South China Sea subducted southwards and the Sibu accretion wedge was formed; E22-E31, during which the Southwest sub-sea basin extended and orogeny was active due to the collision of the Sibu accretion wedge; E32-N11, during which the central sub-sea basin extended, the Miri accretion wedge was formed and “A-type” subduction of the southern margin of the north Balawan occurred; N12-the present, during which large-scale thrusting and napping of the boundary faults in the south and mountain-building have taken place and the South China Sea stopped its extension.

关键词： Nansha ultra-crust layer-block boundary fault layer slip glide dip slip strike slip fault system dynamic process

Deep structure of the Southeast Asian curved subduction system and its dynamic process

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Journal of Oceanology and Limnology 2024年第3期42卷 701-704页

作者： Weiwei DING Key Laboratory of Submarine Geoscience&Second Institute of Oceanography Ministry of Natural ResourcesHangzhou 310012China School of Oceanography Shanghai Jiao Tong UniversityShanghai 200030China

The deep structure,material circulation,and dynamic processes in the Southeast Asia have long been an elusive scientific puzzle due to the lack of systematic scientific observations and recognized theoretical *** on the deep seismic tomography using long-period natural earthquake data,in this study,the deep structure and material circulation of the curved subduction system in Southeast Asia was studied,and the dynamic processes since 100 million years ago was *** is pointed out that challenges still exist in the precise reconstruction of deep mantle structures of the study area,the influence of multi-stage subduction on deep material exchange and shallow magma activity,as well as the spatiotemporal evolution and coupling mechanism of multi-plate *** work should focus on high-resolution land-sea joint 3-D seismic tomography imaging of the curved subduction system in the Southeast Asia,combined with geochemical analysis and geodynamic modelling works.

关键词： curved subduction system deep structure material recycling dynamic process Southeast Asia

Study on the dynamic process of the Onset of South China Sea Summer Monsoon

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Acta meteorologica Sinica 2008年第4期22卷 511-521页

作者：张立凤张永垂张铭 Institute of Meteorology PLA University of Science and Technology

By using the NCEP/NCAR reanalysis data from 1958 to 1997, we first looked into the atmospheric flow conditions in the one month immediately prior to the onset of the South China Sea summer monsoon （SCSSM） each year. A monthly-averaged zonal basic flow of 40-yr composite was then calculated. The stability of Rossby wave in the basic flow was studied based on the spherical barotropic vorticity equation. Furthermore, the spectral function expansion method was adopted to define and compute the evolvement of a developing wave packet. The results indicate that there exists barotropic instability of spherical Rossby wave in the climatically-averaged flow field before the SCSSM onset. The instability is triggered by the westerly jet stream in the Southern Hemisphere, and the strongest instable perturbation lies to the south of the westerly jet stream. The peak of the developing spherical Rossby wave packet propagates from mid and high latitudes to low latitudes, though not crossing the equator, spurring the cumulus convection in the tropical zones. The eruption of the cumulus convection and its spread to monsoon regions help to speed up the adjustment of the general circulation and the SCSSM onset. It is concluded that elements that contribute to the SCSSM onset are on global scale, albeit the onset itself looks like a local phenomenon.

关键词： SCSSM onset spherical barotropic instability- tropic cumulus convection developing wave packet dynamic process

Experimental studies of focal mechanism based on the dynamic process of energy release

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Acta Seismologica Sinica(English Edition) 1997年第3期10卷 113-118页

作者：郑熙铭高后秀杨渝钦杨敬宇李志雄

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关键词： seismic mechanism dynamic process similarity experimental study

Photo-induced doping effect and dynamic process in monolayer MoSe2

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Journal of Semiconductors 2020年第8期41卷 63-67页

作者： Qian Yang Yongzhou Xue Hao Chen Xiuming Dou Baoquan Sun State Key Laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049China

dynamic processes of electron transfer by optical doping in monolayer MoSe2 at 6 K are investigated via measuring time resolved photoluminescence(PL)traces under different excitation ***-dependent electron transfer process can be analyzed by a power-law distribution of t^−α withα=0.1-0.24,depending on the laser excitation *** average electron transfer time of approximately 27.65 s is obtained in the excitation power range of 0.5 to 100μ*** the temperature increases from 20 to 44 K,the energy difference between the neutral and charged excitons is observed to decrease.

关键词： photodoping monolayer MoSe2 dynamic process temperature

MSVM Recognition Model for dynamic process Abnormal Pattern Based on Multi-Kernel Functions

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Journal of Systems Science and Information 2014年第5期2卷 473-480页

作者： Yumin LIU Haofei ZHOU Zhengzhou University Business School

Recognition of quality abnormal patterns for a dynamic process has seen increasing demands nowadays in the real-time process fault detection and diagnosis. As the dynamic data from a quality abnormal process is linearly inseparable, the recognition efficiency of a support vector machine(SVM) model mainly depends on the selection of the kernel functions and the optimizing of their parameters. Based on the analysis of the quality abnormal patterns in a dynamic process, this paper presents a recognition framework of quality abnormal patterns by using a multi-SVM(MSVM). For the different quality abnormal patterns, the simulation results indicate that the recognition accuracies of the MSVM classifiers with the selected kernel functions are quite different. A MSVM recognition model for quality abnormal patterns in a dynamic process is proposed by the kernel functions being of high accuracies. It is shown that this MSVM model with suitable kernel functions can increase the recognition accuracy.

关键词： dynamic process quality abnormal pattern kernel function SVM MSVM recognition model

Research on Control Algorithm Design for Aero-Engine Vane Angle on dynamic process

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Research on Control Algorithm Design for Aero-Engine Vane An...