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General expression for linear and nonlinear time series models

Ren HUANG, Feiyun XU, Ruwen CHEN

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1, Pages 15-24 doi: 10.1007/s11465-009-0015-z

Abstract: However, some nonlinear factors are within the practical system; thus, it is difficult to fit the modelThe model simulation and experiments show that the GNAR model can accurately approximate to the dynamicThe modeling and prediction accuracy of the GNAR model is superior to the classical time series modelsThe proposed GNAR model is flexible and effective.

Keywords： linear and nonlinear autoregressive model system identification time series analysis

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Short-term prediction of influent flow rate and ammonia concentration in municipal wastewater treatment plants

Shuai MA, Siyu ZENG, Xin DONG, Jining CHEN, Gustaf OLSSON

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 1, Pages 128-136 doi: 10.1007/s11783-013-0598-9

Abstract: reconstruction; 2) typical cycle identification using power spectrum density analysis; 3) fitting and prediction modelestablishment based on an autoregressive model.Considering the influence of the rainfalls, a linear fitting model is derived to estimate the relationshipMeasurements used to support coefficient fitting and model testing are acquired from two municipal wastewater

Keywords： influent load prediction wavelet de-noising power spectrum density autoregressive model time-frequency

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Standard model of knowledge representation

Wensheng YIN

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 3, Pages 275-288 doi: 10.1007/s11465-016-0372-3

Abstract: methods include predicate logic, semantic network, computer programming language, database, mathematical modelintrinsic link between various knowledge representation methods, a unified knowledge representation modelAccording to ontology, system theory, and control theory, a standard model of knowledge representationThe model is composed of input, processing, and output.In addition, the standard model of knowledge representation provides a way to solve problems of non-precision

Keywords： knowledge representation standard model ontology system theory control theory multidimensional representation

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Zhang Zhengyan: Pre Training Language Model Integrating Knowledge (2020-4-3)

18 Apr 2022

Keywords：工程管理

State of the Art of Compartment Fire Modeling

Zheng Xin,Yuan Hongyong

Strategic Study of CAE 2004, Volume 6, Issue 3, Pages 68-74

Abstract: The relevant underlying physical assumptions are presented first and the conventional model performance

Keywords： compartment field model zone model network model FZN (field zone and network) model empirical model

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Elevated temperature creep model of parallel wire strands

Frontiers of Structural and Civil Engineering Pages 1060-1071 doi: 10.1007/s11709-023-0981-y

Abstract: analyze their creep behavior, this study experimentally investigated the elevated temperature creep modelThe parameters in the general empirical formula, the Bailey–Norton model, and the composite time-hardeningmodel were fitted based on the experimental results.By evaluating the accuracy and form of the models, the composite time-hardening model, which can simultaneously

Keywords： parallel wire strands experimental study elevated temperature creep model

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Impact of crude distillation unit model accuracy on refinery production planning

Gang FU, Pedro A. Castillo CASTILLO, Vladimir MAHALEC

Frontiers of Engineering Management 2018, Volume 5, Issue 2, Pages 195-201 doi: 10.15302/J-FEM-2017052

Abstract: In this work, we examine the impact of crude distillation unit (CDU) model errors on the results of refinery-wideWe compare the swing cut+ bias CDU model with a recently developed hybrid CDU model (Fu et al., 2016)The hybrid CDU model computes material and energy balances, as well as product true boiling point (TBPCase studies of optimal operation computed using a planning model that is based on the swing cut+ biasCDU model and using a planning model that incorporates the hybrid CDU model are presented.

Keywords： impact of model accuracy on production planning swing cut+ bias CDU model hybrid CDU model refinery feedstock

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Test-driven verification/validation of model transformations

László LENGYEL,Hassan CHARAF

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 2, Pages 85-97 doi: 10.1631/FITEE.1400111

Abstract: Why is it important to verify/validate model transformations?Verified/validated model transformations make it possible to ensure certain properties of the generatedFor example, a verified/validated model transformation can ensure the preservation of certain propertiesduring the model-to-model transformation.of a novel test-driven method for verifying/validating model transformations.

Keywords： Graph rewriting based model transformations Verification/validation Test-driven verification

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Digital twin-assisted gearbox dynamic model updating toward fault diagnosis

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-023-0748-0

Abstract: One of the core challenges of intelligent fault diagnosis is that the diagnosis model requires numerousGenerating training data using a virtual model is a potential solution for addressing such a problem,and the construction of a high-fidelity virtual model is fundamental and critical for data generationIn this study, a digital twin-assisted dynamic model updating method for fault diagnosis is thus proposedhelical gearbox; the virtual data generated by this model can be used for gear fault diagnosis.

Keywords： digital twin gearbox model construction model updating physical–virtual interaction

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Estimation of composite load model with aggregate induction motor dynamic load for an isolated hybrid

Nitin Kumar SAXENA,Ashwani Kumar SHARMA

Frontiers in Energy 2015, Volume 9, Issue 4, Pages 472-485 doi: 10.1007/s11708-015-0373-7

Abstract: The composite load is a combination of the static and dynamic load model.To develop this composite load model, the exponential load is used as a static load model and inductionmotors (IMs) are used as a dynamic load model.This aggregate model is used as a dynamic load model.of static load and for the fifth and third order IM dynamic load model using state space model.

Keywords： isolated hybrid power system (IHPS) composite load model static load dynamic load induction motor loadmodel aggregate load

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Initiation of Setaria as a model plant

Xianmin DIAO,James SCHNABLE,Jeffrey L. BENNETZEN,Jiayang LI

Frontiers of Agricultural Science and Engineering 2014, Volume 1, Issue 1, Pages 16-20 doi: 10.15302/J-FASE-2014011

Abstract: Model organisms such as Arabidopsis ( ) and rice ( ) have proven essential for efficient scientific discoverysome important processes such as C photosynthesis are not found in either Arabidopsis or rice, so new modeldomesticated foxtail millet ( ) and its wild ancestor, green foxtail ( ), have recently been proposed as novel modelThis review outlines the development of these species as model organisms, and discusses current challengesand future potential of a Setaria model.

Keywords： Setaria foxtail millet C₄ photosynthesis model organism

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A time−space porosity computational model for concrete under sulfate attack

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0985-7

Abstract: This study proposes a mechanical–chemical model to simulate the spatiotemporal distribution of the porosityIn addition, the expansion strain at the macro-scale is obtained using a stress analysis model of compositeThe results demonstrate that the expansion strains calculated using the suggested model agree well withThe proposed model can forecast and assess the porosity of concrete covers and provide a credible approach

Keywords： deformation porosity internal expansion stress external sulfate attack mechanical–chemical coupling model

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The Construction of Tetrahedral Model of Engineering Ethical Evaluation

Jin Wang

Frontiers of Engineering Management 2014, Volume 1, Issue 1, Pages 62-70 doi: 10.15302/J-FEM-2014009

Abstract: vividly expose the differences in people's way of understanding which inspires author's study of the modelWith four elements of the project —artifact, engineer, user and environment, a tetrahedral model of integrityIn this model, four "Lamps" — i. e, four elements of engineering — in four corners provide light whilefour "Mirrors" — the result of reflection of four elements — reflect whether the tetrahedral model can

Keywords： tetrahedral model ethical evaluation engineering Lamps and Mirrors

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Four-protein model for predicting prognostic risk of lung cancer

Frontiers of Medicine 2022, Volume 16, Issue 4, Pages 618-626 doi: 10.1007/s11684-021-0867-0

Abstract: combined with CEA, CA125, and CYFRA21-1 were used to construct a recursive partitioning decision tree modelto establish a four-protein diagnostic model and predict the survival of patients with lung cancer.

Keywords： lung cancer HSP90β decision tree model prognosis

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Probabilistic model for vessel-bridge collisions in the Three Gorges Reservoir

Bo GENG , Hong WANG , Junjie WANG ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3, Pages 279-285 doi: 10.1007/s11709-009-0044-z

Abstract: over the Yangtze River in the Three Gorges Reservoir, and an analysis of the geometric probabilistic modelvessels in collision probability calculation, the aberrancy angle and vessel velocity probabilistic modelrelated with impact force, a probabilistic model is established and also verified by goodness-of-fitThe vessel transit path distribution can be expressed by the normal distribution model.The aberrancy angle distribution of vessels accepts maximum I distribution model, and its distribution

Keywords： vessel-bridge collision probabilistic model parameter statistics