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Efficientmesh denoising via robust normal filtering and alternate vertex updating Article

Tao LI, Jun WANG, Hao LIU, Li-gang LIU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 11,   Pages 1828-1842 doi: 10.1631/FITEE.1601229

Abstract: Based on the robust guided normal estimation and alternate vertex updating strategy, we investigate aIn the vertex updating process, we classify vertices according to filtered normals at each iteration

Keywords： Mesh denoising     Guided normal filtering     Alternate vertex updating     Corner-aware neighborhoods    

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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: In this study, a digital twin-assisted dynamic model updating method for fault diagnosis is thus proposedsurrogate technique, and optimization algorithm are applied to increase the efficiency during the model updatingFinally, the proposed method is successfully applied to the dynamic model updating of a single-stage

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

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Application of a vertex chain operation algorithm on topological analysis of three-dimensional fractured

Zixin ZHANG, Jia WU, Xin HUANG

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 187-208 doi: 10.1007/s11709-017-0391-0

Abstract: This paper applies the concepts of directed edges and vertex chain operations which are typical for blockPolygon subtraction and union algorithms that rely merely on vertex chain operation are proposed, which

Keywords： morphology     block assembling     vertex operation     discontinuities    

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Multi-stage Model Updating Method via Substructure Analysis

Guo Li,Li Zhaoxia,Chen Hongtian

Strategic Study of CAE 2006, Volume 8, Issue 9,   Pages 42-48

Abstract:

Basing on substructure analysis, original research on multi-stage model updating method (MSMUM) ispresented to reduce the uncertainties in traditional model updating process.The kernel philosophy of the multi-stage model updating method is used to update a complicated FE modelComparing the updated FE model here with the updated model using traditional updating method, it couldbe concluded that the multi-stage updating method is more effective.

Keywords： model updating     substructure     error localization     parameters updating     Runyang Bridge    

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Engineering Application of FEM Updating Technology

Chen Decheng,Wei Zhensong,Qu Guangji,Zhu An wen,Xiao Yifang

Strategic Study of CAE 2001, Volume 3, Issue 10,   Pages 59-63

Abstract:

In this paper, focusing on practical engineering application of Finite Element Model (FEM) updatingThis paper explains the basic thought and numerical method of a FEM updating approach that has achievedalso presents the difficulties in the practical engineering application of Finite Element Model (FEM) updating

Keywords： FEM updating     test model     sensitivity     dynamic reduction     natural frequency     mode shape    

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Dynamic test and finite element model updating of bridge structures based on ambient vibration

HUANG Minshui, ZHU Hongping, LI Lin, GUO Wenzeng

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 2,   Pages 139-144 doi: 10.1007/s11709-008-0028-4

Abstract: The dynamic characteristics of bridge structures are the basis of structural dynamic response and seismic analysis, and are also an important target of health condition monitoring. In this paper, a three-dimensional finite-element model is first established for a highway bridge over a railroad on No.312 National Highway. Based on design drawings, the dynamic characteristics of the bridge are studied using finite element analysis and ambient vibration measurements. Thus, a set of data is selected based on sensitivity analysis and optimization theory; the finite element model of the bridge is updated. The numerical and experimental results show that the updated method is more simple and effective, the updated finite element model can reflect the dynamic characteristics of the bridge better, and it can be used to predict the dynamic response under complex external forces. It is also helpful for further damage identification and health condition monitoring.

Keywords： numerical     effective     Highway     vibration     complex external    

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A DNA Computing Model for the Graph Vertex Coloring Problem Based on a Probe Graph Article

Jin Xu, Xiaoli Qiang, Kai Zhang, Cheng Zhang, Jing Yang

Engineering 2018, Volume 4, Issue 1,   Pages 61-77 doi: 10.1016/j.eng.2018.02.011

Abstract: this bottleneck and improve the processing speed, we propose a DNA computing model to solve the graph vertexmodel are as follows:①The exponential explosion problem is solved by dividing subgraphs, reducing the vertex

Keywords： DNA computing     Graph vertex coloring problem     Polymerase chain reaction    

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Ambient vibration testing and updating of the finite element model of a simply supported beam bridge

Ivan Gomez ARAUJO, Esperanza MALDONADO, Gustavo Chio CHO

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 344-354 doi: 10.1007/s11709-011-0124-8

Abstract: experimentally obtained dynamic characteristics were also achieved in the analytical model through updating

Keywords： modal analysis     parameter identification     ambient vibration test     Eigensystem Realization Algorithm (ERA) method     finite element method    

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Finite element model updating of a large structure using multi-setup stochastic subspace identification

Reza KHADEMI-ZAHEDI, Pouyan ALIMOURI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 965-980 doi: 10.1007/s11709-019-0530-x

Abstract: In the present contribution, operational modal analysis in conjunction with bees optimization algorithm are utilized to update the finite element model of a solar power plant structure. The physical parameters which required to be updated are uncertain parameters including geometry, material properties and boundary conditions of the aforementioned structure. To determine these uncertain parameters, local and global sensitivity analyses are performed to increase the solution accuracy. An objective function is determined using the sum of the squared errors between the natural frequencies calculated by finite element method and operational modal analysis, which is optimized using bees optimization algorithm. The natural frequencies of the solar power plant structure are estimated by multi-setup stochastic subspace identification method which is considered as a strong and efficient method in operational modal analysis. The proposed algorithm is efficiently implemented on the solar power plant structure located in Shahid Chamran university of Ahvaz, Iran, to update parameters of its finite element model. Moreover, computed natural frequencies by numerical method are compared with those of the operational modal analysis. The results indicate that, bees optimization algorithm leads accurate results with fast convergence.

Keywords： operational modal analysis     solar power plant structure     multi-setup stochastic subspace     bees optimization algorithm     sensitivity analysis    

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Alternate partial root-zone irrigation with high irrigation frequency improves root growth and reduces

Shaoqing DU, Ling TONG, Shaozhong KANG, Fusheng LI, Taisheng DU, Sien LI, Risheng DING

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 2,   Pages 188-196 doi: 10.15302/J-FASE-2017176

Abstract: Alternate partial root-zone irrigation (APRI) can improve water use efficiency in arid areas.Overall, alternate partial root-zone irrigation with high frequency has a great potential to promote

Keywords： alternate partial root-zone irrigation     apple tree     leaf water use efficiency     root length density     stomatal    

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Deep reinforcement learning-based critical element identification and demolition planning of frame structures

Shaojun ZHU; Makoto OHSAKI; Kazuki HAYASHI; Shaohan ZONG; Xiaonong GUO

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 11,   Pages 1397-1414 doi: 10.1007/s11709-022-0860-y

Abstract: This paper proposes a framework for critical element identification and demolition planning of frame structures. Innovative quantitative indices considering the severity of the ultimate collapse scenario are proposed using reinforcement learning and graph embedding. The action is defined as removing an element, and the state is described by integrating the joint and element features into a comprehensive feature vector for each element. By establishing the policy network, the agent outputs the Q value for each action after observing the state. Through numerical examples, it is confirmed that the trained agent can provide an accurate estimation of the Q values, and handle problems with different action spaces owing to utilization of graph embedding. Besides, different behaviors can be learned by varying hyperparameters in the reward function. By comparing the proposed method and the conventional sensitivity index-based methods, it is demonstrated that the computational cost is considerably reduced because the reinforcement learning model is trained offline. Besides, it is proved that the Q values produced by the reinforcement learning agent can make up for the deficiencies of existing indices, and can be directly used as the quantitative index for the decision-making for determining the most expected collapse scenario, i.e., the sequence of element removals.

Keywords： progressive collapse     alternate load path     demolition planning     reinforcement learning     graph embedding    

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Investigation on a mitigation scheme to resist the progressive collapse of reinforced concrete buildings

Iman TABAEYE IZADI, Abdolrasoul RANJBARAN

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 421-430 doi: 10.1007/s11709-012-0181-7

Abstract: Saeed Alrudaini to provide the alternate load path to redistribute residual loads and preventing from

Keywords： prevent progressive collapse     alternate load path     reinforced concrete buildings     nonlinear dynamic     retrofitting    

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Subspace-based identification of discrete time-delay system Article

Qiang LIU,Jia-chen MA

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 6,   Pages 566-575 doi: 10.1631/FITEE.1500358

Abstract: To obtain a state-space model for the time-delay system, an alternate convex search (ACS) algorithm is

Keywords： Identification problems     Time-delay systems     Subspace identification method     Alternate convex search    

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Map Update in Raster Mode by Means of Aerial and Space Images

Lin Zongjian

Strategic Study of CAE 2000, Volume 2, Issue 4,   Pages 43-47

Abstract:

To meet the urgent needs of updating 1：10 000 scale and 1 ：50 000 scale topographic map for the whole

Keywords： surveying and mapping     remote sensing     map updating     digital raster graphic (DRG)    

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Strategic Updating of Internet Plus Considering Digital Transformation

He Wei,Zhang Weidong,Wang Chaoxian

Strategic Study of CAE 2020, Volume 22, Issue 4,   Pages 10-17 doi: 10.15302/J-SSCAE-2020.04.002

Abstract:

Since the Internet Plus initiative was proposed five years ago, innovations associated with the new-generation information technology have accelerated and digital transformation of the economy and society has exhibited many new features. These necessitate the construction of a new system and exploration of new paths for the transformation, and measures currently taken under the Internet Plus initiative need to be evolved and upgraded. This study follows the objective laws of technological industry transformation and is based on the theoretical paradigm of technology economics. It analyzes the new trend and research frontiers of digital transformation at the technology, application, and policy levels. The study reveals that the current technology system and technological capabilities of digital transformation have gradually improved, a new blueprint for the transformation has emerged, and the integration of information technology with the real economy has entered a new stage. However, the digital transformation framework system needs to be reconstructed, the key elements of transformation needs to be strengthened, and key breakthroughs need to be achieved. To this end, in the follow-up policy design of the Internet Plus initiative and during the formulation of the 14th Five-Year Plan, China should focus on exploring the potentials of digital elements, promote the construction of the digital transformation ecology, establish transformation and innovation networks, and upgrade the policy support system for the Internet Plus initiative, thereby promoting the digital transformation of economy and society to a higher level.

Keywords： technology industry transformation     digital transformation     Internet Plus     industry upgrade    

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Title Author Date Type Operation

Efficientmesh denoising via robust normal filtering and alternate vertex updating

Tao LI, Jun WANG, Hao LIU, Li-gang LIU

Journal Article

Digital twin-assisted gearbox dynamic model updating toward fault diagnosis

Journal Article

Application of a vertex chain operation algorithm on topological analysis of three-dimensional fractured

Zixin ZHANG, Jia WU, Xin HUANG

Journal Article

Multi-stage Model Updating Method via Substructure Analysis

Guo Li,Li Zhaoxia,Chen Hongtian

Journal Article

Engineering Application of FEM Updating Technology

Chen Decheng,Wei Zhensong,Qu Guangji,Zhu An wen,Xiao Yifang

Journal Article

Dynamic test and finite element model updating of bridge structures based on ambient vibration

HUANG Minshui, ZHU Hongping, LI Lin, GUO Wenzeng

Journal Article

A DNA Computing Model for the Graph Vertex Coloring Problem Based on a Probe Graph

Jin Xu, Xiaoli Qiang, Kai Zhang, Cheng Zhang, Jing Yang

Journal Article

Ambient vibration testing and updating of the finite element model of a simply supported beam bridge

Ivan Gomez ARAUJO, Esperanza MALDONADO, Gustavo Chio CHO

Journal Article

Finite element model updating of a large structure using multi-setup stochastic subspace identification

Reza KHADEMI-ZAHEDI, Pouyan ALIMOURI

Journal Article

Alternate partial root-zone irrigation with high irrigation frequency improves root growth and reduces

Shaoqing DU, Ling TONG, Shaozhong KANG, Fusheng LI, Taisheng DU, Sien LI, Risheng DING

Journal Article

Deep reinforcement learning-based critical element identification and demolition planning of frame structures

Shaojun ZHU; Makoto OHSAKI; Kazuki HAYASHI; Shaohan ZONG; Xiaonong GUO

Journal Article

Investigation on a mitigation scheme to resist the progressive collapse of reinforced concrete buildings

Iman TABAEYE IZADI, Abdolrasoul RANJBARAN

Journal Article

Subspace-based identification of discrete time-delay system

Qiang LIU,Jia-chen MA

Journal Article

Map Update in Raster Mode by Means of Aerial and Space Images

Lin Zongjian

Journal Article

Strategic Updating of Internet Plus Considering Digital Transformation

He Wei,Zhang Weidong,Wang Chaoxian

Journal Article