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Computer-Based modelling.of Network Functions for Linear Dynamic Circuits Using Modified Nodal Approach

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Computer Modeling in Engineering & Sciences 2017年第3期113卷 261-274页

作者： Ali Bekir YILDIZ Engineering Faculty Department of Electrical EngineeringKocaeli UniversityTurkey

In this paper,a computer-based systematic and efficient formulation method is presented for obtaining the network functions of linear or linearized time-invariant dynamic *** method employs the modified nodal approach to obtain the system *** technique is based on developing a matrix formulation for modelling.network *** using both symbolic manipulation of algebraic expressions and numeric processes,the network functions are expressed with a matrix-based *** examples are given to illustrate the features of the method.

关键词： Network functions modified nodal approach modelling.

Stratigraphic Architecture and Computer modelling.of Carbonate Platform Margin,Late Ordovician Lianglitage Formation,Central Tarim Basin

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Journal of Earth Science 2012年第4期23卷 627-638页

作者：李浩林畅松张燕梅张荣茜芮志峰黄理力 School of Energy Resources China University of Geosciences School of Ocean Sciences China University of Geosciences School of Information Engineering China University of Geosciences

According to the different geometries and reflected characteristics in the seismic sections, the carbonate platform margin of the northern slope can be summarized as three basic depositional architectures in the Late Ordovician Lianglitage （良里塔格） Formation of the Tazhong （塔中） uplift. The type one mainly located in the west of the carbonate platform margin, and it showed obvious imbricate progradation from the interior to the margin of the platform. The type two was in the middle of the carbonate platform margin, which showed retrogradational stacking pattern in the same transgres- sive systems tract period, and the slope strata of the platform margin showed progradational sequence in the highstand systems tract period. The type three located in the east of the carbonate platform margin, and it showed the parallel aggradational architecture. The crossing well section along the northern slope of the Tazhong carbonate platform showed that the depositional thickness became thinner from the east to the west. The thickest belt located in the east of the platform margin, and became thinner rapidly towards the basin and the platform interior. These indicated that the paleogeomorphology ofthe Tazhong uplift was probably high in the west and low in the east during the period of the Late Ordovician Lianglitage Formation. According to the interpretation of seismic profiles and the computer modelling.result, the depositional architectures of sequence O31-2 showed aggradation, retrogradation and progradation from the east to the west of the carbonate platform margin during the transgression period. This meant that the accommodation became smaller gradually from the east to the west along the northern carbonate platform margin of the Tazhong *** difference of the accommodation was probably caused by the difference of tectonic subsidence. Also, computer-aided modelling.can be used to deeply understand the importance of various control parameters on the carbonate platform dep

关键词： carbonate platform margin depositional architecture tectonic subsidence accommo-dation modelling.

modelling.and Remote Control of an Excavator

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International Journal of Automation and computing 2010年第3期7卷 349-358页

作者： Yang Liu Mohammad Shahidul Hasan Hong-Nian Yu Faculty of Computing Engineering and Technology Staffordshire University Stafford ST18 0AD UK Centre for Applied Dynamics Research School of Engineering University of Aberdeen Aberdeen AB24 3UE UK

This paper presents the results of an on-going project and investigates modelling.and remote control issues of an industry excavator. The details of modelling. communication, and control of a remotely controllable excavator are studied. The paper mainly focuses on trajectory tracking control of the excavator base and robust control of the excavator arm. These will provide the fundamental base for our next research step. In addition, extensive simulation results for trajectory tracking of the excavator base and robust control of the excavator arm are given. Finally, conclusions and further work have been identified.

关键词： Excavator remote control mechatronics modelling.

New eddy viscosity modelling.of turbulent boundary layer with adverse pressure gradient

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Chinese Science Bulletin 1996年第2期41卷 158-162页

作者：王振东吴双群 Department of Mechanics Tianjin University Tianjin 300072 China

A new eddy viscosity modelling.of turbulence is proposed in ref. [1], whose characteristicsexpress the anisotropy of the turbulence stress. In ref. [1], the way of proposing somedistributional laws of the eddy viscosity tensor components is found from experimental re-sults for elementary flow of each kind of shearing flow, and then we can forecast thecomplicated shearing flows more accurately. In this way, the distributional laws of the ed-

关键词： eddy viscosity tensor turbulent boundary layer with adverse pressure gradient new eddy viscosity modelling.

Experiments and modelling.of Coal Pyrolysis underFluidized Bed Conditions

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Journal of Thermal Science 1999年第3期8卷 202-206页

作者： ZhangYongzhe XuXiangdong 等 DepartmentofThermalEngineering TsinghuaUniversityBeijing100084China DepartmentofThermalEngineering

The Pyrolysis behavior of two Chinese coals has been investigated in a laboratory-scale bubbling fluidized bed system in Siegen University, Germany. Experimental equipment and procedure are introduced. The amounts of Pyrolysis species of each coal were measured, calculated and compared. A newmethod was presented to determine the needed parameters in FG-DVC model with the experimentalresults instead of other much more complicated experiments.

关键词： coal pyrolysis fluidized bed modelling.

Stochastic analysis of particle-fluid two-phase flows

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Chinese Science Bulletin 2000年第9期45卷 806-810页

作者： SUN Guogang LI Jinghai GONG Fuzhou LUO Shunlong MA Zhiming Institute of Chemical Metallurgy Chinese Academy of Sciences100080 BeijingChina Institute of Applied Mathematics Chinese Academy of Sciences100080 BeijingChina

This paper is devoted to exploring approaches to understanding the stochastic characteristics of particle-fluid two-phase flow. By quantifying the forces dominating the particle motion and modelling.the less important and/or unclear forces as random forces, a stochastic differential equation is proposed to describe the complex behavior of a particle motion. An exploratory simulation has shown satisfactory agreement with phase doppler particle analyzer (PDPA) measurements, which indicates that stochastic analysis is a potential approach for revealing the details of particle-fluid flow phenomena.

关键词： two-phase flow random force stochastic simulation and modelling.

A theoretical model of electrostatic ultrasonic transducers with micro air-gap structure

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Chinese Science Bulletin 1998年第9期43卷 728-731页

作者： GE Lifeng (GE Li-Feng) Department of Physics, Anhui University, Hefei 230039, China Department of Physics Anhui University Hefei China

A new plate-on-air-spring model (or called short tube or DK model) for modelling.the behaviour of electrostatic air-coupled ultrasonic transducers is developed and verified by accurate predictions of natural frequenci... 详细信息

关键词： electrostatic ultrasonic transducer micro air-gap structure modelling.

Simulation on climatic effect of giant extraterrestrial body impacts against the Earth in the Cenozoic

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Chinese Science Bulletin 1995年第6期40卷 501-505页

作者：肖志峰欧阳自远林文祝 Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

The climate modelling.research carried out in detail in the 1980s showed that the ’nuclear winter’ induced by the global nuclear war will be the calamity of human beings. It is easy to imagine that the impacts of giant extraterrestrial bodies, which is similar to the nuclear war but with bigger energy, will produce longer and worse climate effects.

关键词： impact climate effect modelling.

Study of Real──Time Simulation for Two──Phase Flow Network

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Journal of Thermal Science 1995年第2期4卷 125-128页

作者： Xie Maoqing Zhu Wen Ren Tingjin Zhang Qing(Tsinghua University, Department of Thermal Engineering, Beijing 100084, China) Department of Thermal Engineering Tsinghua University Beijing China

To mead the need of real-time simulation for two-phase flow network in power plants, this paper presents a mathematical model based on basic principles and a numerical solution method. This model can be used to describe nonhomogeneous two-phase flow networks. The algorithm presellted in this paper makes use of the sparsity, the symmetry and the diagonal dominancy of the coefficient matrix to save storage space, reduce computational time and meet the requirements of real-time simulations.

关键词： two-phase flow network real-time simulation modelling.