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Presentation of regression analysis, GP and GMDH models to predict the pedestrian density in various

Iraj BARGEGOL; Seyed Mohsen HOSSEINIAN; Vahid NAJAFI MOGHADDAM GILANI; Mohammad NIKOOKAR; Alireza OROUEI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 250-265 doi: 10.1007/s11709-021-0785-x

Abstract: In this study, the relationship between space mean speed (SMS), flow rate and density of pedestrianswas investigated in different pedestrian facilities, including 1 walkway, 2 sidewalks, 2 signalizedFinally, two prediction models of density were obtained using genetic programming (GP) and group methodResults also indicated that GP had a higher R2 than GMDH in the prediction of pedestrianand pedestrian density.

Keywords： pedestrian density     regression analysis     GP model     GMDH model    

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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.However, the properties of pedestrian movement may vary in urban areas according to the type of walkingIn contrast to pedestrian behavior in other walking facilities, pedestrians whose attention is attractedIn this study, we conducted a video-based observational survey to collect pedestrian flow and speed datacapture the relationships between the relevant macroscopic quantities, thereby providing insight into pedestrian

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

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The Group Interaction Field for Learning and Explaining Pedestrian Anticipation

Xueyang Wang,Xuecheng Chen,Puhua Jiang,Haozhe Lin,Xiaoyun Yuan,Mengqi Ji,Yuchen Guo,Ruqi Huang,Lu Fang,

Engineering doi: 10.1016/j.eng.2023.05.020

Abstract: However, existing solutions struggle to predict pedestrian anticipation accurately, because the influenceWhile group relationships and group interactions are ubiquitous and significantly influence pedestrianHere, we propose the group interaction field (GIF), a novel group-aware representation that quantifies pedestrian

Keywords： Human behavior modeling and prediction     Implicit representation of pedestrian anticipation     Group interaction    

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Research on pedestrian escape route without visibility based on Markov chain model

Xiaoping ZHENG, Lijuan DU, Hongjiang WANG,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 3,   Pages 283-289 doi: 10.1007/s11705-009-0272-8

Abstract: It is a pioneering work to use a Markov chain model to study the pedestrian escape route without visibilitystanding, crawling, walking, leaping, jogging, and running) are applied to describe the characteristics of pedestrianBesides, eight main direction changes are used to describe the transition characteristic of a pedestrianAt the same time, this paper analyzes the escape route from two views, i.e., pedestrian pace states andThe research results show that the Markov chain model is more realistic as a means of studying pedestrian

Keywords： pioneering     direction     spatial-grid     realistic     transition characteristic    

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Stochastic pedestrian avoidance for autonomous vehicles using hybrid reinforcement learning Research Article

Huiqian LI, Jin HUANG, Zhong CAO, Diange YANG, Zhihua ZHONG,lihq20@mails.tsinghua.edu.cn,huangjin@tsinghua.edu.cn,caoc15@mails.tsinghua.edu.cn,ydg@tsinghua.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 1,   Pages 131-140 doi: 10.1631/FITEE.2200128

Abstract: Ensuring the safety of s is essential and challenging when are involved. Classical avoidance strategies cannot handle uncertainty, and learning-based methods lack performance guarantees. In this paper we propose a (HRL) approach for to safely interact with s behaving uncertainly. The method integrates the rule-based strategy and reinforcement learning strategy. The confidence of both strategies is evaluated using the data recorded in the training process. Then we design an activation function to select the final policy with higher confidence. In this way, we can guarantee that the final policy performance is not worse than that of the rule-based policy. To demonstrate the effectiveness of the proposed method, we validate it in simulation using an accelerated testing technique to generate stochastic s. The results indicate that it increases the success rate for avoidance to 98.8%, compared with 94.4% of the baseline method.

Keywords： Pedestrian     Hybrid reinforcement learning     Autonomous vehicles     Decision-making    

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Effect of current density on groundwater arsenite removal performance using air cathode electrocoagulation

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1399-1

Abstract:

• With the same charge, current density had little effect on As(III)

Keywords： Electrocoagulation     Air cathode     Arsenic     Current density     Energy consumption    

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Effects of exercise therapy on bone mineral density in early postmenopausal women: a controlled trial

Shilin DENG MD ,

Frontiers of Medicine 2009, Volume 3, Issue 3,   Pages 323-329 doi: 10.1007/s11684-009-0061-2

Abstract: effect of a well-designed combined aerobic, resistance, and extension exercise program on bone mineral density

Keywords： early postmenopausal women     bone mineral density     exercise     effects    

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density measurement for plastic injection molding via ultrasonic technology

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0714-2

Abstract: Density variation during the injection molding process directly reflects the state of plastic melt andTherefore, in-situ density measurement is of great interest and has significant application valueThis study is the first to propose an in-situ density measurement method using ultrasonic technology

Keywords： ultrasonic measurement     melt density     in-situ measurement     injection molding    

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Testing development of different surface treatments on pervious concrete

Mina YEKKALAR,Liv HASELBACH,Quinn LANGFITT

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 4,   Pages 385-393 doi: 10.1007/s11709-016-0351-0

Abstract: Pervious concrete systems are developing stormwater management technologies which also have wintertime benefits as melting snow may percolate into the system instead of refreezing on the surface. Enhancing the surface microtexture of pervious concrete may also be beneficial in preventing icing or slipping by pedestrians. This research explored different surface treatments on pervious concrete specimens both qualitatively from personal judgements, and quantitatively through static friction measurements with a spring balance with respect to “slipperiness”. The tests were performed on both dry and wet specimens. One aim was to determine whether the spring balance method may be a simple test for comparing surface treatments on pavement samples with little surface area such as laboratory specimens or sidewalk sections. The other purpose was to make a preliminary decision of which surface treatments to use for a sidewalk installation for future studies on wintertime performance. The reliability analysis of the spring balance results showed that there was high operator consistency. In addition, there was a high level of consistency on average results between the quantitative and qualitative methods. This implies that the spring balance test may be an acceptable methodology for comparative analyses with respect to static friction.

Keywords： pervious concrete     static coefficient of friction     pedestrian    

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Relationship of adrenomedullin expression and microvessel density and prognosis in smooth muscle tumor

JIANG Yuan, TIAN Xuehong, YUAN Jie, JIN Yuemei, TAN Yusong

Frontiers of Medicine 2007, Volume 1, Issue 4,   Pages 398-400 doi: 10.1007/s11684-007-0077-4

Abstract: was to investigate the relationship between the expression of adrenomedullin (ADM) and microvessel density

Keywords： anticarcinogenic     microvessel density     malignant potency     muscle     uterine leiomyosarcoma    

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Single-electromagnet levitation for density measurement and defect detection

Yuhan JIA, Peng ZHAO, Jun XIE, Xuechun ZHANG, Hongwei ZHOU, Jianzhong FU

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1,   Pages 186-195 doi: 10.1007/s11465-020-0608-0

Abstract: The single-electromagnet levitation device has a large measuring range and can realize accurate densitymeasurement and defect detection of high-density materials, such as glass and aluminum alloy.

Keywords： single-electromagnet     electromagnetic levitation     density measurement     defect detection    

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Application of gamma-ray attenuation technology in density measurement of a slurry reactor

Jian XU, Weisheng WEI, Kai ZHANG

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 486-490 doi: 10.1007/s11705-010-0509-6

Abstract: Axial density profile of the gas-liquid-solid mixture in a slurry bubble column was measured by gamma-rayThe results showed that the density in the column decreases with the increase of column height, which

Keywords： slurry reactor     axial density distribution     gamma-ray attenuation technology    

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frameworks as highly active electrocatalysts for oxygen reduction and oxygen evolution reaction: a density

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 5,   Pages 570-580 doi: 10.1007/s11705-022-2247-y

Abstract: reaction catalytic activities of heterometallic cluster-based organic frameworks are investigated using density

Keywords： bimetallic metal–organic frameworks     bifunctional electrocatalyst     density functional theory     oxygen    

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Influence of pressure and density on the rheological properties of rockfills

Erich BAUER, Zhongzhi FU, Sihong LIU

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1,   Pages 25-34 doi: 10.1007/s11709-012-0143-0

Abstract: unified description of the interaction at least between the state of weathering, the stress state, the density

Keywords： rockfills     solid hardness     wetting deformation     hypoplasticity     creep    

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Tripotassium citrate monohydrate derived carbon nanosheets as a competent assistant to manganese dioxide with remarkable performance in the supercapacitor

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 3,   Pages 420-432 doi: 10.1007/s11705-021-2065-7

Abstract: and manganese dioxide/carbon nanosheets as the anode was assembled, achieving an outstanding energy densityof 54.68 Wh·kg–1 and remarkable power density of 6399.2 W·kg–1 superior to conventional

Keywords： carbon nanosheets     manganese dioxide     asymmetric supercapacitors     energy density     power density    

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Title Author Date Type Operation

Presentation of regression analysis, GP and GMDH models to predict the pedestrian density in various

Iraj BARGEGOL; Seyed Mohsen HOSSEINIAN; Vahid NAJAFI MOGHADDAM GILANI; Mohammad NIKOOKAR; Alireza OROUEI

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

The Group Interaction Field for Learning and Explaining Pedestrian Anticipation

Xueyang Wang,Xuecheng Chen,Puhua Jiang,Haozhe Lin,Xiaoyun Yuan,Mengqi Ji,Yuchen Guo,Ruqi Huang,Lu Fang,

Journal Article

Research on pedestrian escape route without visibility based on Markov chain model

Xiaoping ZHENG, Lijuan DU, Hongjiang WANG,

Journal Article

Stochastic pedestrian avoidance for autonomous vehicles using hybrid reinforcement learning

Huiqian LI, Jin HUANG, Zhong CAO, Diange YANG, Zhihua ZHONG,lihq20@mails.tsinghua.edu.cn,huangjin@tsinghua.edu.cn,caoc15@mails.tsinghua.edu.cn,ydg@tsinghua.edu.cn

Journal Article

Effect of current density on groundwater arsenite removal performance using air cathode electrocoagulation

Journal Article

Effects of exercise therapy on bone mineral density in early postmenopausal women: a controlled trial

Shilin DENG MD ,

Journal Article

density measurement for plastic injection molding via ultrasonic technology

Journal Article

Testing development of different surface treatments on pervious concrete

Mina YEKKALAR,Liv HASELBACH,Quinn LANGFITT

Journal Article

Relationship of adrenomedullin expression and microvessel density and prognosis in smooth muscle tumor

JIANG Yuan, TIAN Xuehong, YUAN Jie, JIN Yuemei, TAN Yusong

Journal Article

Single-electromagnet levitation for density measurement and defect detection

Yuhan JIA, Peng ZHAO, Jun XIE, Xuechun ZHANG, Hongwei ZHOU, Jianzhong FU

Journal Article

Application of gamma-ray attenuation technology in density measurement of a slurry reactor

Jian XU, Weisheng WEI, Kai ZHANG

Journal Article

frameworks as highly active electrocatalysts for oxygen reduction and oxygen evolution reaction: a density

Journal Article

Influence of pressure and density on the rheological properties of rockfills

Erich BAUER, Zhongzhi FU, Sihong LIU

Journal Article

Tripotassium citrate monohydrate derived carbon nanosheets as a competent assistant to manganese dioxide with remarkable performance in the supercapacitor

Journal Article