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A High Accurate Steady-state Physical Model for High-voltage VDMOS

Bao Jiaming,Sun Weifeng,Zhao Ye,Lu Shengli

Strategic Study of CAE 2008, Volume 10, Issue 2,   Pages 72-78

Abstract:

A high accurate steady-state physical model for high-voltage VDMOS isIn the model, a more proper assumption result in obtaining both the electric field and the voltage inthe double diffused channel region by analytical method; and after studying physical characteristicstability in the region adjacent to saturation of the drain current are improved in the paper´s model, and furthermore, the calculation prec ision of the paper´s model is high.

Keywords： VDMOS     steady-state physical model     analytical method    

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Automated synthesis of steady-state continuous processes using reinforcement learning

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 2,   Pages 288-302 doi: 10.1007/s11705-021-2055-9

Abstract: The environment consists of a steady-state flowsheet simulator that contains all physical knowledge.

Keywords： automated process synthesis     flowsheet synthesis     artificial intelligence     machine learning     reinforcement learning    

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Modeling and analysis of steady-state vibration induced by backlash in servo rotary table

Xiao YANG,Dun LU,Sanli LIU,Jun ZHANG,Wanhua ZHAO

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1,   Pages 43-47 doi: 10.1007/s11465-015-0327-0

Abstract: Steady-state vibration may be induced by backlash in closed loop feed drive systems.The accuracy of this model is verified by an experiment.such as position controller gain, velocity controller gain, load and the magnitude of backlash, on steady-stateThe steady-state vibration amplitude increases with the position controller gain, load and the magnitudeThe steady-state vibration frequency increases with the position controller gain and the velocity controller

Keywords： backlash     servo rotary table     steady-state vibration    

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Effect of dilution rate on dynamic and steady-state biofilm characteristics during phenol biodegradation

Veena Bangalore Rangappa, Vidya Shetty Kodialbail, Saidutta Malur Bharthaiyengar

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 4, doi: 10.1007/s11783-016-0863-9

Abstract: Dynamic and steady state biofilm characteristics depend on dilution rate (DR).The present paper reports the studies on the effect of dilution rate on the physical, chemical and morphologicalThus, the performance of PPBR in terms of dynamic and steady-state biofilm characteristics associated

Keywords： Biofilm     Exopolymeric substances     Phenol     Dilution rate     Pulsed plate bioreactor    

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Steady-state thermal-hydraulic analysis of SCWR assembly

LIU Xiaojing, CHENG Xu

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 475-478 doi: 10.1007/s11708-008-0093-3

Abstract: Among the six gen-IV reactor concepts recommended by the gen-IV international forum (GIF), supercritical water-cooled reactor (SCWR), the only reactor with water as coolant, achieves a high thermal efficiency and, subsequently, has economic advantages over the existing reactors due to its high outlet temperature. A thermal-hydraulic analysis of the SCWR assembly is performed in this paper using the modified COBRA-IV code. Two approaches to reduce the hot channel factor are investigated: decreasing the moderator mass flow and increasing the thermal resistance between moderator channel and its adjacent sub-channels. It is shown that heat transfer deterioration cannot be avoided in SCWR fuel assembly. It is, therefore, highly required to calculate the cladding temperature accurately and to preserve the fuel rod cladding integrity under heat transfer deterioration conditions.

Keywords： cladding temperature     assembly     temperature     coolant     resistance    

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Influence of initial curing conditions and exposure environments on chloride migration in concrete using electrochemical method

Wen XUE, Weiliang JIN, Hiroshi YOKOTA,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3,   Pages 348-353 doi: 10.1007/s11709-010-0077-3

Abstract: The effective chloride diffusion coefficients () were calculated from the steady-state on the basis of

Keywords： durability     effective diffusion coefficient     steady-state     migration test    

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An improved delta-star switching scheme for reactive power saving in three-phase induction motors

P. RAJA,N. KUMARESAN,M. SUBBIAH

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 364-370 doi: 10.1007/s11708-014-0324-8

Abstract: It is proposed that a capacitor can be connected permanently across each phase winding of a three-phase induction motor along with the conventional delta-star switching, for further saving in VARh at reduced loads on the motor. The method of choosing a suitable value for the capacitor and the criteria to be adopted for calculating the power output at which the star to delta switching is to be made are also explained. The experimental results on a 3-phase, 4-pole, 415 V, 50 Hz, 3.3 kW induction motor verify the advantages in adding the capacitor to the phase winding of the motor. Compared to using only a single delta connected stator winding or a delta-star switching, the advantages of the proposed addition of a capacitor, are also demonstrated through a case study conducted on a 400 V, 250 kW motor. Any further improvement in grid side power factor can be achieved by employing a static synchronous compensator (STATCOM) of reduced VAR rating.

Keywords： delta-star switching     induction motor     power factor     steady-state analysis    

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A numerical study of helium-heated inorganic membrane reformer coupling to HTGR

YIN Huaqiang, JIANG Shengyao, JU Huaiming, ZHANG Youjie

Frontiers in Energy 2007, Volume 1, Issue 4,   Pages 446-450 doi: 10.1007/s11708-007-0065-3

Abstract: Based on one-dimensional quasi-homogeneous model, a steady-state model and its computer program were

Keywords： temperature gas-cooled     one-dimensional quasi-homogeneous     steady-state     helium-heated    

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Development of a constitutive model for rockfills and similar granular materials based on the disturbedstate concept

Mehdi VEISKARAMI, Ali GHORBANI, Mohammadreza ALAVIPOUR

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 365-378 doi: 10.1007/s11709-012-0178-2

Abstract: further, the stress-strain curve shows an elasto-plastic behavior which suggests using the disturbed stateconcept to develop a constitutive model to predict the stress-strain behavior.The presented constitutive model complies reasonably with the experimental data.

Keywords： constitutive model     granular material     rockfill     plasticity     disturbed state concept     stress level    

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Multi-class dynamic network traffic flow propagation model with physical queues

Yanfeng LI, Jun LI

Frontiers of Engineering Management 2017, Volume 4, Issue 4,   Pages 399-407 doi: 10.15302/J-FEM-2017041

Abstract: This paper proposes an improved multi-class dynamic network traffic flow propagation model with a considerationof physical queues.To characterize this phenomenon by numerical methods, the improved model is directly formulated in discreteNumerical examples are developed to illustrate the unrealistic flows of the existing model and the performanceof the improved model.

Keywords： first-in-first-out (FIFO)     multi-class traffic     physical queues     traffic flow modeling    

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Machine learning and neural network supported state of health simulation and forecasting model for lithium-ion

Frontiers in Energy doi: 10.1007/s11708-023-0891-7

Abstract: analyses the application of machine learning (ML), one of the many branches of AI, to lithium-ion battery stateReports so far have shown that the utilization of NN to model the SOH of lithium-ion batteries has theby, first, utilizing more field data to play a more practical role in health feature screening and model

Keywords： machine learning     lithium-ion battery     state of health     neural network     artificial intelligence    

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Mean wind load induced incompatibility in nonlinear aeroelastic simulations of bridge spans

Zhitian ZHANG

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 3,   Pages 605-617 doi: 10.1007/s11709-018-0499-x

Abstract: It is shown that, in cases of low wind speeds, the IF-denoted model reflects correctly the mean windload properties, and results in correct mean structural responses; in contrast, the RF-denoted modelcorrect response due to steady aerodynamic nonlinearity.To solve the incompatibility at high wind speeds, a methodology of subtraction of pseudo-steady effectsfrom the aeroelastic model is put forward in this work.

Keywords： bridge     aerodynamics     nonlinear     aeroelastic model     Pseudo-steady     mean wind loads    

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ENHANCING RAINFALL-RUNOFF POLLUTION MODELING BY INCORPORATION OF NEGLECTED PHYSICAL PROCESSES

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 4,   Pages 553-565 doi: 10.15302/J-FASE-2023519

Abstract: The wash-off model has advantages in modeling rainfall-runoff pollution due to the inclusion of two keyphysical processes, build-up and wash-off.The enhanced wash-off model was validated in a typical rural-residential area.The results showed that the model performed better than the established wash-off model and the commonly-usedThe enhanced model can provide deeper insights into non-point pollution mitigation.

Keywords： Erhai Lake     field experiment     non-point source     pollution load     rainfall runoff     wash-off model    

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An operating state estimation model for integrated energy systems based on distributed solution

Dengji ZHOU, Shixi MA, Dawen HUANG, Huisheng ZHANG, Shilie WENG

Frontiers in Energy 2020, Volume 14, Issue 4,   Pages 801-816 doi: 10.1007/s11708-020-0687-y

Abstract: In this paper, the mathematical model of the electricity-gas interconnected integrated energy systemand its state estimation method are studied.simulation model is proposed.A simulation model of an electricity-gas interconnected integrated energy system verifies the efficiencyand accuracy of the state estimation method proposed in this paper.

Keywords： integrated energy system     state estimation     electricity-gas coupling energy system     nonlinear coupling     distributed    

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Study and Application of Steady Flow and Unsteady Flow Mathematical Model for Canal Networks

Zhang Mingliang,Shen Yongming

Strategic Study of CAE 2007, Volume 9, Issue 8,   Pages 92-96

Abstract: Based on Preissmann implicit scheme for one-dimensional Saint-Venant Equation,  the mathematical modelfor one- dimensional river networks and canal networks is developed and the key issues on the model This model is applied to simulating the tree-type irrigation canal networks and complex looped This model is a simple and practical tool for water resource regulation of irrigation canal networks These results show the application value of this model is to set up ecological numerical model

Keywords： Preissmann implicit scheme     canal networks and river networks     discharge distribution     water quality mode    

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Title Author Date Type Operation

A High Accurate Steady-state Physical Model for High-voltage VDMOS

Bao Jiaming,Sun Weifeng,Zhao Ye,Lu Shengli

Journal Article

Automated synthesis of steady-state continuous processes using reinforcement learning

Journal Article

Modeling and analysis of steady-state vibration induced by backlash in servo rotary table

Xiao YANG,Dun LU,Sanli LIU,Jun ZHANG,Wanhua ZHAO

Journal Article

Effect of dilution rate on dynamic and steady-state biofilm characteristics during phenol biodegradation

Veena Bangalore Rangappa, Vidya Shetty Kodialbail, Saidutta Malur Bharthaiyengar

Journal Article

Steady-state thermal-hydraulic analysis of SCWR assembly

LIU Xiaojing, CHENG Xu

Journal Article

Influence of initial curing conditions and exposure environments on chloride migration in concrete using electrochemical method

Wen XUE, Weiliang JIN, Hiroshi YOKOTA,

Journal Article

An improved delta-star switching scheme for reactive power saving in three-phase induction motors

P. RAJA,N. KUMARESAN,M. SUBBIAH

Journal Article

A numerical study of helium-heated inorganic membrane reformer coupling to HTGR

YIN Huaqiang, JIANG Shengyao, JU Huaiming, ZHANG Youjie

Journal Article

Development of a constitutive model for rockfills and similar granular materials based on the disturbedstate concept

Mehdi VEISKARAMI, Ali GHORBANI, Mohammadreza ALAVIPOUR

Journal Article

Multi-class dynamic network traffic flow propagation model with physical queues

Yanfeng LI, Jun LI

Journal Article

Machine learning and neural network supported state of health simulation and forecasting model for lithium-ion

Journal Article

Mean wind load induced incompatibility in nonlinear aeroelastic simulations of bridge spans

Zhitian ZHANG

Journal Article

ENHANCING RAINFALL-RUNOFF POLLUTION MODELING BY INCORPORATION OF NEGLECTED PHYSICAL PROCESSES

Journal Article

An operating state estimation model for integrated energy systems based on distributed solution

Dengji ZHOU, Shixi MA, Dawen HUANG, Huisheng ZHANG, Shilie WENG

Journal Article

Study and Application of Steady Flow and Unsteady Flow Mathematical Model for Canal Networks

Zhang Mingliang,Shen Yongming

Journal Article