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Shadow obstacle model for realistic corner-turning behavior in crowd simulation

Gao-qi HE,Yi JIN,Qi CHEN,Zhen LIU,Wen-hui YUE,Xing-jian LU

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 3, Pages 200-211 doi: 10.1631/FITEE.1500253

Abstract: This paper describes a novel model known as the shadow obstacle model to generate a realistic corner-turningbehavior in crowd simulation.a corner.To calculate a safer route, an optimization method is proposed to generate the corner-turning rule thatWe demonstrate that our model produces a more realistic corner-turning behavior by comparison with real

Keywords： Corner-turning behavior Crowd simulation Safety awareness Rule-based model

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Detection for transverse corner cracks of steel plates’ surface using wavelet

Qiong ZHOU, Qi AN

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 2, Pages 224-227 doi: 10.1007/s11465-009-0017-x

Abstract: An algorithm is presented for detecting transverse corner cracks at a steel plate surface using waveletAccording to characteristics of transverse corner crack images, the wavelet transform is used for theThe experiment shows that transverse corner cracks of steel plates can be more effectively extracted

Keywords： transverse corner cracks defect detection multi-scales wavelet analysis

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Renewable synthetic fuel: turning carbon dioxide back into fuel

Frontiers in Energy 2022, Volume 16, Issue 2, Pages 145-149 doi: 10.1007/s11708-022-0828-6

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Initial life of corner fine cracks on the P60 rails

Shi Rong,Fan Zhiyi,He Yuelei

Strategic Study of CAE 2008, Volume 10, Issue 8, Pages 65-68

Abstract: Outer rails on curve railway have corner fine cracks on the inner flank, and some cracks evaluate downInitially corner fine cracks expand slowly on the early stage, with the times of fatigue loads increasingspeed rate dh/dN breaks.The times of fatigue loads at turn over point is defined as the initial life of corner

Keywords： rail corner fine cracks fatigue cracks crack depth expanding speed initial life

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Experimental Study on Temperature Distribution and Response Behaviors of Steel Element under Corner Fire

Chen Changkun,Yao Bin,Yang Yun,Cai Xin,Zhang Heping,Wan Yutian

Strategic Study of CAE 2005, Volume 7, Issue 9, Pages 70-75

Abstract:

By using ISO9705 Room/Corner Fire Test Rig, thin steel tubes were tested.The response behaviors of steel element under thermal-mechanical coupling effect in a simulated cornerEffects of the temperature elevation and distribution of the steel element under corner fire conditionsIndeed, this non-uniform temperature distribution caused by the corner fire is more dangerous to the

Keywords： ISO9705 Room/Corner Fire Test Rig steel element corner fire temperature distribution

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Prediction of cutting force in turning of UD-GFRP using mathematical model and simulated annealing

Meenu GUPTA, Surinder Kumar GILL

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4, Pages 417-426 doi: 10.1007/s11465-012-0343-2

Abstract:

Glass fiber reinforced plastics (GFRPs) composite is considered to be an alternative to heavy exortic materials. According to the need for accurate machining of composites has increased enormously. During machining, the obtaining cutting force is an important aspect. The present investigation deals with the study and development of a cutting force prediction model for the machining of unidirectional glass fiber reinforced plastics (UD-GFRP) composite using regression modeling and optimization by simulated annealing. The process parameters considered include cutting speed, feed rate and depth of cut. The predicted values radial cutting force model is compared with the experimental values. The results of prediction are quite close with the experimental values. The influences of different parameters in machining of UD-GFRP composite have been analyzed.

Keywords： UD-GFRP ANOVA radial cutting force PCD tool Taguchi method regression analysis simulated annealing multi objective techniques

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Progress in Study of Standard Room/Corner Fire Test of Lining Materials on Enclosure

Yang Yun,Zhang Heping,Liu Jiyang

Strategic Study of CAE 2003, Volume 5, Issue 4, Pages 55-60

Abstract:

Standard room/corner fire test is a full-scale reaction-to-fire research method.This paper introduces the principles and experimental devices of ISO 9705 room/corner fire test, anddescribes the progress in study on fire behavior of linings, which is under this method，including the

Keywords： lining materials full-scale ISO 9705 room/corner fire test

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Application of high-turning bowed compressor stator to redesign of highly loaded fan stage

LI Shaobin, SU Jiexian, WANG Zhongqi

Frontiers in Energy 2008, Volume 2, Issue 4, Pages 534-540 doi: 10.1007/s11708-008-0066-6

Abstract: A redesign of a highly loaded fan stage by using high-turning bowed compressor stator was conducted.

Keywords： off-design different numerical contouring technique high-performance compressor

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Research on the dynamic mechanical characteristics and turning tool life under the conditions of excessivelyheavy-duty turning

Genghuang HE, Xianli LIU, Fugang YAN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 3, Pages 329-334 doi: 10.1007/s11465-012-0303-x

Abstract:

The dynamic mechanical characteristics of excessively heavy-duty cutting were analyzed based on the cutting experiments with 2.25Cr-1Mo-0.25V steel used in hydrogenated cylindrical shells. By investigating the influence of dynamic mechanical characteristics on the tools’ failure in limited heavy-duty cutting processes, the model of dynamic shearing force in the cutting area was established. However, the experimental results showed that the dynamic shear flow stress in the cutting area greatly influenced the tools’ fatigue. The heavy-duty cutting tool was damaged in the form of a shearing fracture. Through a comprehensive analysis of the theory, the critical condition of the tools’ fracture under extreme loading was established.

Keywords： extreme loading cutting shear flow stress dynamic cutting force fatigue fracture

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Effect of magneto rheological damper on tool vibration during hard turning

P. Sam PAUL, A. S. VARADARAJAN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4, Pages 410-416 doi: 10.1007/s11465-012-0341-4

Abstract:

Recently, the concept of hard turning has gained considerable attention in metal cutting as it canapparently replace the traditional process cycle of turning, heat treating, and finish grinding forMR) fluid damper for suppressing tool vibration and promoting better cutting performance during hard turningand shape parameters that can suppress tool vibration and promote better cutting performance during turning

Keywords： tool vibration magneto rheological damper hard turning surface finish tool wear

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Sub-nanometer finishing of polycrystalline tin by inductively coupled plasma-assisted cutting

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0751-5

Abstract: grain boundary (GB) limits the surface roughness of polycrystalline tin after single-point diamond turningThe results of residual stress release demonstrated that the residual stress of plasma-assisted turningprocessing after 504 h stress release was 10.7 MPa, while that of the turning process without the ICP

Keywords： plasma-assisted cutting polycrystalline tin single-point diamond turning surface roughness

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Nanoparticle-enhanced coolants in machining: mechanism, application, and prospects

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 4, doi: 10.1007/s11465-023-0769-8

Abstract: comprehensively and quantitatively evaluating the material removal characteristics during machining in turningResults showed that turning of Ti‒6Al‒4V with multi-walled carbon nanotube NPECs with a volume fraction

Keywords： nanoparticle-enhanced coolant minimum quantity lubrication biolubricant thermophysical properties turning

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Study on Big Data-based Behavior Modification in Metro Construction

Lie-yun Ding,Sheng-yu Guo

Frontiers of Engineering Management 2015, Volume 2, Issue 2, Pages 131-136 doi: 10.15302/J-FEM-2015037

Abstract: , construction accidents frequently happen, which are significantly attributable to workers’ unsafe behaviorBehavior-based safety (BBS) is an effective method to modify workers’ unsafe behavior.This paper introduces the study on big data-based metro construction behavior modification, aiming toFirst, the behavior modification pushing mechanism based on content-based personalized recommendationSecondly, the development of behavior modification system of metro construction (BMSMC) is introduced

Keywords： big data unsafe behavior behavior modification behavior-based safety (BBS) unsafe behavior rate

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Flow behavior of non-spherical particle flowing in hopper

He TAO,Wenqi ZHONG,Baosheng JIN

Frontiers in Energy 2014, Volume 8, Issue 3, Pages 315-321 doi: 10.1007/s11708-014-0331-9

Abstract: Ellipsoidal particles flowing in the hopper were simulated by using the discrete element method (DEM), and described by the multi-element method. The contact detection algorithm and equations for ellipsoidal particle motion in hopper were developed. And the simulation results were confirmed by experiment. Additionally, the mass flow rate, pressure distribution and velocity distribution of two kinds of particles were examined. The results show that the mass flow rate of ellipsoidal particles is smaller than that of spherical particles. There is a maximum value of pressure drop at the top of the junction. Besides, the pressure drop decreases with the discharging time increasing. The velocity of spherical particle is larger than that of ellipsoidal.

Keywords： discrete element method ellipsoidal particle flow behavior hopper

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Effects of herding behavior of tradable green certificate market players on market efficiency: Insights

Frontiers in Energy 2023, Volume 17, Issue 2, Pages 266-285 doi: 10.1007/s11708-021-0752-1

Abstract: efficiency is reflected in stimulating renewable energy investment, but may be reduced by the herding behaviorheterogeneous agents, communication structure, and regulatory rules to explore the characteristics of herding behaviorThe results show that the evolution of herding behavior reduces information asymmetry and improves marketMoreover, the herding behavior may evolve to an equilibrium where the revenue of market players is comparable

Keywords： tradable green certificate herding behavior evolution heterogeneous agent model complex network