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Optimization of urban bus operation frequency under common route condition with rail transit

Bin YU, Sijia REN, Enze WU, Yifan ZHOU, Yunpeng WANG

Frontiers of Engineering Management 2017, Volume 4, Issue 4,   Pages 451-462 doi: 10.15302/J-FEM-2017036

Abstract: common, this paper aims to present the overlapped operation condition of bus and rail transit using a bi-levelmodel from the perspective of bus operators.Frequency optimization model is established in the upper-level model.A lower-level Logit model based on Agent simulation is set for traffic mode split.Data on the transit system in Dalian city are chosen as an example to test the feasibility of the model

Keywords： common route     bus operation frequency     bi-level model     Agent simulation     SCE-UA algorithm    

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Leveraging individual-level data to advance air pollution health risk management

Jianxun YANG, Wenjing WU, Miaomiao LIU, Jun BI

Frontiers of Engineering Management 2022, Volume 9, Issue 2,   Pages 337-342 doi: 10.1007/s42524-022-0189-1

Abstract: geospatial mappings of air pollution capture local patterns, they do not necessarily represent individual-levelThus, individual-level exposure and health assessment are critical in advancing the engineering management

To perform air pollution health risk assessment and management at the individual level, first

In this comment, we summarize different types of individual-level data and outline pathwaysrepresentative studies revolving around these aspects and showcase how abundant information at the individual level

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Rapid evaluation technology for CNC machine tool slide level based on built-in sensors

Yuqing ZHOU, Xuesong MEI, Gedong JIANG, Nuogang SUN,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1,   Pages 79-86 doi: 10.1007/s11465-009-0070-5

Abstract: Slide level impacts the CNC machine tool performance.The deterioration of slide level will result in the torsional vibration of a feed-axis control systemIn this paper, a new type of rapid evaluation method for machine tool slide level is proposed, whichmathematical model between the slide level and the measured data is established.In addition, two different level identification methods are comparatively analyzed.

Keywords： slide level     built-in sensors     Stribeck effect     model identification    

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A Bayesian modeling approach to bi-directional pedestrian flows in carnival events

S. Q. XIE, S. C. WONG, William H. K. LAM

Frontiers of Engineering Management 2017, Volume 4, Issue 4,   Pages 483-489 doi: 10.15302/J-FEM-2017023

Abstract: Bi-directional pedestrian flows are common at crosswalks, footpaths, and shopping areas.Using the collected data, an extant mathematical model was calibrated to capture the relationships betweenBayesian inference was employed to calibrate the model by using prior data obtained from a previous controlled

Keywords： pedestrian flow model     bi-directional interactions     empirical studies     Bayesian inference    

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Layout optimization of steel reinforcement in concrete structure using a truss-continuum model

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 669-685 doi: 10.1007/s11709-023-0963-0

Abstract: Based on bi-directional evolutionary structural optimization (BESO), a new approach is developed in thisThis approach combines a minimum compliance objective function with a hybrid truss-continuum model.Furthermore, a modified bi-directional evolutionary structural optimization (M-BESO) method is proposedto control the level of tensile stress in concrete.

Keywords： bi-directional evolutionary structural optimization     steel-reinforced concrete     concrete stress     reinforcementmethod     hybrid model    

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M-LFM: a multi-level fusion modeling method for shape−performance integrated digital twin of complex

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0708-0

Abstract: systems by developing a new digital twin framework that includes simulation data, measuring data, multi-level

Keywords： shape−performance integrated digital twin (SPI-DT)     multi-level fusion modeling (M-LFM)     surrogate model    

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Isogeometric analysis based on geometric reconstruction models

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 782-797 doi: 10.1007/s11465-021-0648-0

Abstract: The CAD model is represented by boundary polygons or point cloud and is embedded into a regular backgroundgrid, and a model reconstruction method is proposed to obtain the level set function of the approximatemodel, which can be directly used in IGA.

Keywords： isogeometric analysis     reconstruction model     level set function     trimmed element     point cloud    

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

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: It was found that both the stress level and the shear stress ratio, like most of granular materials,elasto-plastic behavior which suggests using the disturbed state concept to develop a constitutive modelThe 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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A Flexible Multi-Layer Map Model Designed for Lane-Level Route Planning in Autonomous Vehicles Article

Kun Jiang, Diange Yang, Chaoran Liu, Tao Zhang, Zhongyang Xiao

Engineering 2019, Volume 5, Issue 2,   Pages 305-318 doi: 10.1016/j.eng.2018.11.032

Abstract: map model and lane-level route planning.The current limitation of the lane-level map model is not its accuracy but its flexibility; this studyproposes a novel seven-layer map structure, called as Tsinghua map model, which is able to support autonomousFor lane-level route planning, we propose a hierarchical route-searching algorithm to accelerate theIn addition, we model the travel costs allocated for lane-level road networks by analyzing vehicle maneuvers

Keywords： Lane-level     Route planning     Tsinghua map model     Travel cost model    

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Cleaning the energy sources for water heating among Nanjing households: barriers and opportunities for solar and natural gas

Lingyun ZHU,Beibei LIU,Jun BI

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 5,   Pages 757-766 doi: 10.1007/s11783-013-0603-3

Abstract: Energy for water heating accounts for an increasing part in residential energy demand in China. An extensive survey was conducted to analyze the determinants of household energy choices for water heaters among residents in Nanjing, China. Two sets of variables were examined as potential influences: building features and household socio-economic characteristics. Results suggest that building features such as gas availability and building structures, and household characteristics such as household head’s education degree and energy-conserving sense are crucial determinants in choosing natural gas as water heater energy. Installation permission for solar water heater, building stories, and residential location serve as determining factors in choosing solar water heaters. Based on these, barriers and opportunities are discussed for transitions toward cleaner water heating energies, and suggestions are given for local governments to promote cleaner energy replacement in China.

Keywords： residential energy demand     water heating     multinomial logit model    

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Research of Lossless Image Compression Base on Level-scalability

Li Luwei,Zhou Shuoyan,Cai Yiyu

Strategic Study of CAE 2005, Volume 7, Issue 10,   Pages 33-37

Abstract:

A level-embedded lossless image compression method for continuous-tone still images is presented.Level (bit-plane) scalability is achieved by separating the image into two layers (the base layer andwith a number of scalable and non-scalable lossless image compression algorithms indicates that the level-embeddedcompression efficiency over non-scalable lossless compression, while offering the significant benefit of level-scalability

Keywords： data processing techniques     lossless image compression     context-based model     embedded level    

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Analysis of influencing factors of groundwater level variation at Donglutian coal industrial ground of

Lin Dujun,Gong Shoucai,Zhang Yinzhou

Strategic Study of CAE 2012, Volume 14, Issue 2,   Pages 49-53

Abstract:

On the basis of study for three-dimensional flow numerical model , Theauthor analyzed influencing factor of variation in water level at Donglutian coal industrial groundThe results showed that there are several factors influence the change of ground-water level by filling

Keywords： numerical model     variation in ground water level     influencing factors     sensitivity analysis    

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Impact of the Three Gorges Project on the Water Level and Navigation Channel in the Near-dam Reach Downstream

Lu Yongjun ,Chen Zhicong,Zhao lianbai ,Shao Xuejun,Yang Meiqing,Li Yunzhong

Strategic Study of CAE 2002, Volume 4, Issue 10,   Pages 67-72

Abstract:

The river channel change, the bed load and bed material armoring, and the water level lowering afterThe water level lowering and it's impact on navigation in the period of construction and initialoperation of the Three Gorges project are predicted by use of the results of mathematical and physical model

Keywords： Gezhouba project     Three Gorges project     erosion     water level lowering     navigation lock and navigation channel     mathematical model     physical model    

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Topology optimization of piezoelectric bi-material actuators with velocity feedback control

Mariana MORETTI, Emílio C. N. SILVA

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 2,   Pages 190-200 doi: 10.1007/s11465-019-0537-y

Abstract: The bi-material and multifunctional concepts are considered for the design of a controlled piezoelectricThe bi-material piezoelectric actuator (BPEA) has its metallic host layer designed by the TOM, which

Keywords： topology optimization method     bi-material piezoactuator     active velocity feedback control     time-domain transient    

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Bi-modes alternation stepping ultrasonic motors

JIN Jiamei, ZHAO Chunsheng

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 101-105 doi: 10.1007/s11465-008-0018-1

Abstract: Two-phase sinusoidal signals corresponding to the two modal frequencies drive the motor bi-direction

Keywords： miss-step     bi-direction     Two-phase sinusoidal     positioning     accumulative    

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Title Author Date Type Operation

Optimization of urban bus operation frequency under common route condition with rail transit

Bin YU, Sijia REN, Enze WU, Yifan ZHOU, Yunpeng WANG

Journal Article

Leveraging individual-level data to advance air pollution health risk management

Jianxun YANG, Wenjing WU, Miaomiao LIU, Jun BI

Journal Article

Rapid evaluation technology for CNC machine tool slide level based on built-in sensors

Yuqing ZHOU, Xuesong MEI, Gedong JIANG, Nuogang SUN,

Journal Article

A Bayesian modeling approach to bi-directional pedestrian flows in carnival events

S. Q. XIE, S. C. WONG, William H. K. LAM

Journal Article

Layout optimization of steel reinforcement in concrete structure using a truss-continuum model

Journal Article

M-LFM: a multi-level fusion modeling method for shape−performance integrated digital twin of complex

Journal Article

Isogeometric analysis based on geometric reconstruction models

Journal Article

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

Mehdi VEISKARAMI, Ali GHORBANI, Mohammadreza ALAVIPOUR

Journal Article

A Flexible Multi-Layer Map Model Designed for Lane-Level Route Planning in Autonomous Vehicles

Kun Jiang, Diange Yang, Chaoran Liu, Tao Zhang, Zhongyang Xiao

Journal Article

Cleaning the energy sources for water heating among Nanjing households: barriers and opportunities for solar and natural gas

Lingyun ZHU,Beibei LIU,Jun BI

Journal Article

Research of Lossless Image Compression Base on Level-scalability

Li Luwei,Zhou Shuoyan,Cai Yiyu

Journal Article

Analysis of influencing factors of groundwater level variation at Donglutian coal industrial ground of

Lin Dujun,Gong Shoucai,Zhang Yinzhou

Journal Article

Impact of the Three Gorges Project on the Water Level and Navigation Channel in the Near-dam Reach Downstream

Lu Yongjun ,Chen Zhicong,Zhao lianbai ,Shao Xuejun,Yang Meiqing,Li Yunzhong

Journal Article

Topology optimization of piezoelectric bi-material actuators with velocity feedback control

Mariana MORETTI, Emílio C. N. SILVA

Journal Article

Bi-modes alternation stepping ultrasonic motors

JIN Jiamei, ZHAO Chunsheng

Journal Article