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Analyzing the Effect of the Intra-Pixel Position of Small PSFs for Optimizing the PL of Optical Subpixel Localization Article

Haiyang Zhan, Fei Xing, Jingyu Bao, Ting Sun, Zhenzhen Chen, Zheng You, Li Yuan

Engineering 2023, Volume 27, Issue 8,   Pages 140-149 doi: 10.1016/j.eng.2023.03.009

Abstract: With unavoidable imaging noise, there is a precision limit when estimating the target positions on imagePrevious studies have clearly reported the effects of the first three parameters on the precision limitHere, we develop a localization precision limit analysis framework for revealing the effect of the intra-pixelTo accurately estimate the precision limit in practical applications, we provide effective PSF (ePSF)Its combination with ePSF modeling allows us to successfully reach the precision limit in experiments

Keywords： Optical measurement     Subpixel localization     Precision limit optimization     Small point spread functions    

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Air-bearing position optimization based on dynamic characteristics of ultra-precision linear stages

CHEN Xuedong, LI Zhixin

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 400-407 doi: 10.1007/s11465-008-0060-z

Abstract: Air-bearings are installed between the stator and the mover of ultra-precision linear stages to suppressThe combined optimization method is used to optimize the air-bearings position.of different components in manufacture elements and to implement the system dynamic characteristics optimization

Keywords： manufacture     different     interaction     air-bearings     response amplitude    

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Precision glass molding: Toward an optimal fabrication of optical lenses

Liangchi ZHANG,Weidong LIU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1,   Pages 3-17 doi: 10.1007/s11465-017-0408-3

Abstract: Precision glass molding (PGM) has thus been developed to realize an efficient manufacture of such opticalfrom mold material selection, property and deformation characterization of optical glass to process optimizationThe realization of such optimization is a necessary step for the Industry 4.0 of PGM.

Keywords： precision glass molding     optical lens     constitutive modeling     optimization     manufacturing chain     Industry    

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Foundations bearing capacity subjected to seepage by the kinematic approach of the limit analysis

Mehdi VEISKARAMI, Ghasem HABIBAGAHI

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4,   Pages 446-455 doi: 10.1007/s11709-013-0227-5

Abstract: The kinematic approach of the limit analysis was employed to find the upper-bound limit of the bearing

Keywords： foundation     bearing capacity     limit analysis     numerical computation     plasticity     seepage    

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New response surface model and its applications in aerodynamic optimization of axial compressor blade

LIU Xiaojia, NING Fangfei

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 541-549 doi: 10.1007/s11708-008-0077-3

Abstract: Several illustrations are presented to show the fitting precision of the method.Based on this model, a numerical aerodynamic optimization platform for the axial compressor 2D bladeprofiles is developed, by which aerodynamic optimization of two compressor blade profiles are presented

Keywords： definition     objective distribution     fitting precision     combination     numerical aerodynamic    

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3D fracture modelling and limit state analysis of prestressed composite concrete pipes

Pengfei HE, Yang SHEN, Yun GU, Pangyong SHEN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 165-175 doi: 10.1007/s11709-018-0484-4

Abstract: In this manuscript, we study fracture of prestressed cylindrical concrete pipes. Such concrete pipes play a major role in tunneling and underground engineering. The structure is modelled fully in 3D using three-dimensional continuum elements for the concrete structure which beam elements are employed to model the reinforcement. This allows the method to capture important phenomena compared to a pure shell model of concrete. A continuous approach to fracture is chosen when concrete is subjected to compressive loading while a combined continuous-discrete fracture method is employed in tension. The model is validated through comparisons with experimental data.

Keywords： cylindrical concrete structures     limit state analysis     3D fracture modelling     prestressed composite pipes    

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Modeling limit force capacities of high force to volume lead extrusion dampers

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 609-622 doi: 10.1007/s11709-021-0724-x

Abstract: Lead extrusion dampers are supplemental energy-dissipation devices that are used to mitigate seismic structural damage. Small volumetric sizes and high force capacities define high-force-to-volume (HF2V) devices, which can absorb significant response energy without sacrificial damage. However, the design of such devices for specific force capacities has proven difficult based on the complexities of their internal reaction mechanisms, leading to the adoption of empirical approaches. This study developed upper- and lower-bound force capacity estimates from analytical mechanics based on direct and indirect metal extrusion for guiding design. The derived equations are strictly functions of HF2V device geometric parameters, lead material properties, and extrusion mechanics. The upper-bound estimates from direct and indirect extrusion are denoted as (FUB,1, FUB,2) and (FUB,3, FUB,4), respectively, and the lower-bound estimates are denoted as (FLB, FLB,1) based on the combination of extrusion and friction forces. The proposed models were validated by comparing the predicted bounds to experimental force capacity data from 15 experimental HF2V device tests. The experimental device forces all lie above the lower-bound estimates (FLB, FLB,1) and below the upper-bound estimates (FUB,1, FUB,2, FUB,4). Overall, the (FLB, FUB,2) pair provides wider bounds and the (FLB,1, FUB,4/FUB,1) pair provides narrower bounds. The (FLB,1, FUB,1) pair has a mean lower-bound gap of 36%, meaning the lower bound was 74% of the actual device force on average. The mean upper-bound gap was 33%. The bulge area and cylinder diameter of HF2V devices are key parameters affecting device forces. These relatively tight bounds provide useful mechanics-based predictive design guides for ensuring that device forces are within the targeted design range after manufacturing.

Keywords： extrusion     lead dampers     upper and lower bound     analytical modelling     limit force    

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Setting up a heart rate alarm limit to decrease oculocardiac reflex during strabismus surgery in children

ZHANG Kangkang, GU Enhua, LU Junjie

Frontiers of Medicine 2008, Volume 2, Issue 3,   Pages 295-297 doi: 10.1007/s11684-008-0056-4

Abstract: The aim of this paper is to investigate a method which may decrease the incidence and severity of oculocardiac reflex (OCR) without drugs. One hundred and sixty children undergoing strabismus surgery were allocated to two groups using double-blind randomization. OCR was defined as a decrease of more than 10% from the baseline heart rate during operation. An alarm sounded and a lamp flashed as soon as OCR occurred in group I, and neither of the above happened in group II. OCR occurred (1.151 ± 0.858) times in group I and (2.287 ± 1.371) times in group II ( < 0.05). Heart rate decreased by (23 ± 19) bpm in group I and (35 ± 28) bpm in group II ( < 0.05). The duration of OCR in group I and group II was (4.36 ± 4.26)s and (7.62 ± 6.41)s, respectively ( < 0.05). The recovery time for group I and group II was (15.36 ± 13.28)s and (32.36 ± 19.57)s, respectively ( < 0.05). The numbers of times of interruption were 8 in group I (10%) and 26 in group II (32%) ( < 0.01). This method significantly decreased the incidence and severity of OCR during strabismus surgery in children.
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Thermal characteristic analysis and thermal design technology for high speed high precision machine tools

Gao Jianmin,Shi Xiaojun,Xu Aiming and Zhao Boxuan

Strategic Study of CAE 2013, Volume 15, Issue 1,   Pages 28-33

Abstract:

Based on how to improve the inherent thermal performance of high speed high precision machine tools, theories and methods about thermal characteristic analysis, thermal structure optimization

Keywords： high speed high precision machine tool     thermal characteristic analysis     thermal structure optimization    

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Do not let precision medicine be kidnapped

Zhiping Yang

Frontiers of Medicine 2015, Volume 9, Issue 4,   Pages 512-513 doi: 10.1007/s11684-015-0425-8

Abstract:

Obama’s precision medicine initiative made the medical community boil over after the initiativePrecision medicine has been advocated by the majority of scientists and doctors.This article does not oppose precision medicine.However, the incentive of vigorously promoting precision medicine at present is a concern.

Keywords： precision medicine     personalized medicine     genomics    

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A toughness based deformation limit for X- and K-joints under brace axial tension

Bo GU,Xudong QIAN,Aziz AHMED

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 3,   Pages 345-362 doi: 10.1007/s11709-016-0333-2

Abstract: This study reports a deformation limit for the initiation of ductile fracture failure in fatigue-crackedThe proposed approach sets the deformation limit as the numerically computed crack driving force in aThe development of the deformation limit includes a normalization procedure, which covers a wide rangedemonstrates the conservative nature of the proposed deformation limit.The proposed deformation limit, when extrapolated to a zero crack depth, provides an estimate on the

Keywords： circular hollow section (CHS)     tubular joint     fracture failure     deformation limit     J-integral    

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Stability analysis of layered slopes in unsaturated soils

Guangyu DAI; Fei ZHANG; Yuke WANG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 3,   Pages 378-387 doi: 10.1007/s11709-022-0808-2

Abstract: This study presents stability analyses of layered soil slopes in unsaturated conditions and uses a limit

Keywords： slope stability     suction stress     unsaturated soil     layered slope     limit equilibrium    

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Review on the progress of ultra-precision machining technologies

Julong YUAN, Binghai LYU, Wei HANG, Qianfa DENG

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 2,   Pages 158-180 doi: 10.1007/s11465-017-0455-9

Abstract:

Ultra-precision machining technologies are the essential methods, to obtain the highest form accuracyThe conception, applications and history of ultra-precision machining are introduced in this article,and the developments of ultra-precision machining technologies, especially ultra-precision grinding,ultra-precision cutting and polishing are also reviewed.

Keywords： ultra-precision grinding     ultra-precision cutting     ultra-precision polishing     research status in China     development    

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Adaptive selective ES-FEM limit analysis of cracked plane-strain structures

H. NGUYEN-XUAN,T. RABCZUK

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 478-490 doi: 10.1007/s11709-015-0317-7

Abstract: This paper presents a simple and efficient approach for predicting the plastic limit loads in crackedWe use two levels of mesh repartitioning for the finite element limit analysis.The limit analysis problem is recast into the compact form of a second-order cone programming (SOCP)The present method retains a low number of optimization variables.It offers a convenient way for designing and solving the large-scale optimization problems effectively

Keywords： cracked structure     limit analysis     von Mises criterion     edge-based strain smoothing     second-order cone programming    

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capacities of under-reamed piles in soft clay underlaid by stiff clay using lower-bound finite element limit

Mantu MAJUMDER, Debarghya CHAKRABORTY

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 537-551 doi: 10.1007/s11709-021-0708-x

Abstract: piles in soft clay underlaid by stiff clay is numerically studied using the lower-bound finite element limit

Keywords： bearing capacity     uplift capacity     under-reamed pile     clay     limit analysis    

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Title Author Date Type Operation

Analyzing the Effect of the Intra-Pixel Position of Small PSFs for Optimizing the PL of Optical Subpixel Localization

Haiyang Zhan, Fei Xing, Jingyu Bao, Ting Sun, Zhenzhen Chen, Zheng You, Li Yuan

Journal Article

Air-bearing position optimization based on dynamic characteristics of ultra-precision linear stages

CHEN Xuedong, LI Zhixin

Journal Article

Precision glass molding: Toward an optimal fabrication of optical lenses

Liangchi ZHANG,Weidong LIU

Journal Article

Foundations bearing capacity subjected to seepage by the kinematic approach of the limit analysis

Mehdi VEISKARAMI, Ghasem HABIBAGAHI

Journal Article

New response surface model and its applications in aerodynamic optimization of axial compressor blade

LIU Xiaojia, NING Fangfei

Journal Article

3D fracture modelling and limit state analysis of prestressed composite concrete pipes

Pengfei HE, Yang SHEN, Yun GU, Pangyong SHEN

Journal Article

Modeling limit force capacities of high force to volume lead extrusion dampers

Journal Article

Setting up a heart rate alarm limit to decrease oculocardiac reflex during strabismus surgery in children

ZHANG Kangkang, GU Enhua, LU Junjie

Journal Article

Thermal characteristic analysis and thermal design technology for high speed high precision machine tools

Gao Jianmin,Shi Xiaojun,Xu Aiming and Zhao Boxuan

Journal Article

Do not let precision medicine be kidnapped

Zhiping Yang

Journal Article

A toughness based deformation limit for X- and K-joints under brace axial tension

Bo GU,Xudong QIAN,Aziz AHMED

Journal Article

Stability analysis of layered slopes in unsaturated soils

Guangyu DAI; Fei ZHANG; Yuke WANG

Journal Article

Review on the progress of ultra-precision machining technologies

Julong YUAN, Binghai LYU, Wei HANG, Qianfa DENG

Journal Article

Adaptive selective ES-FEM limit analysis of cracked plane-strain structures

H. NGUYEN-XUAN,T. RABCZUK

Journal Article

capacities of under-reamed piles in soft clay underlaid by stiff clay using lower-bound finite element limit

Mantu MAJUMDER, Debarghya CHAKRABORTY

Journal Article