scholarly journals A new approach for line recognition in large-size images using Hough transform

2003 ◽  
Author(s):  
Jiqiang Song ◽  
Min Cai ◽  
M.R. Lyu ◽  
Shijie Cai
Keyword(s):  
Hough Transform ◽  
New Approach ◽  
Large Size

Speed-up ellipse enclosing character detection approach for large-size document images by parallel scanning and Hough transform

2015 ◽  
Vol 8 (1) ◽  
pp. 371-378 ◽  
Author(s):  
H. Waruna H. Premachandra ◽  
Chinthaka Premachandra ◽  
Chandana Dinesh Parape ◽  
Hiroharu Kawanaka
Keyword(s):  
Hough Transform ◽  
Document Images ◽  
Large Size ◽  
Detection Approach ◽  
Speed Up

scholarly journals Substitutive Press-Bolster and Press-Ram Models for the Virtual Estimation of Stamping-Tool Cambering

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 279
Author(s):  
Farshad Abbasi ◽  
Alex Sarasua ◽  
Javier Trinidad ◽  
Nagore Otegi ◽  
Eneko Saenz de Argandoña ◽  
...  
Keyword(s):  
Cost Effective ◽  
Medium Size ◽  
Error Sources ◽  
Static Loads ◽  
New Approach ◽  
Beam Elements ◽  
Large Size ◽  
The Press ◽  
Final Adjustment ◽  
Tooling System

Today’s stamping simulations are realized by ignoring the elastic deformation of the press and tooling system through the assumption of a rigid behavior and a perfect press stroke. However, in reality, the press and tool components deform elastically and are one of the major error sources for the final adjustment and blue-spotting of the dies. In order to tackle this issue, a new approach is proposed in this study that substitutes the press stiffness by means of a substitutive model composed of cost-effective shell and beam elements. The substitute model was calibrated using full-scale measurements, in which a 20,000 kN trial press was experimentally characterized by measuring its deformation under static loads. To examine the robustness of the substitute model, a medium-size tool and a large-size tool were simulated together with the substitutive model. To this end, a B-pillar tool was re-machined based on the substitute-model results and a new cambering procedure was proposed and validated throughout the blue-painting procedure. The newly developed substitute model was able to replicate the global stiffness of the press with a high accuracy and affordable calculation time. The implementation of the findings can aid toolmakers in eliminating most of the reworking and home-line trials.

Assessment of Super-gravity Concentrating V-containing Spinel Phase from Vanadium Slag

2015 ◽  
Vol 34 (1) ◽  
Author(s):  
Juncheng Li ◽  
Zhancheng Guo ◽  
Jintao Gao
Keyword(s):  
Particle Size ◽  
Gravity Field ◽  
Size Distribution ◽  
Spinel Phase ◽  
Vanadium Slag ◽  
New Approach ◽  
Large Size ◽  
Gravity Coefficient ◽  
Moving Speed

AbstractA new approach to concentrate V-containing spinel phase from vanadium slag by super gravity was investigated. The samples obtained by the gravity coefficient G ≥ 1050, time t ≥ 30 min and temperature T ≥ 1523 K appear significant layers and V-containing spinel phase presents gradient size distribution in the sample along the super gravity. The mechanism of moving speed of V-containing spinel particles in super gravity field was also discussed, and the conclusion indicates that the moving speed of V-containing spinel particles is proportional to the square of the V-containing spinel particle size. As a result, large size V-containing spinel particles move a farther distance than the small ones and gather at the bottom of the sample. Under the hypothesis that the vanadium and silicon exist in the slag in terms of V

From the Hough Transform to a New Approach for the Detection and Approximation of Elliptical Arcs

1998 ◽  
Vol 72 (3) ◽  
pp. 215-236 ◽  
Author(s):  
Christian Daul ◽  
Pierre Graebling ◽  
Ernest Hirsch
Keyword(s):  
Hough Transform ◽  
New Approach

A New Approach to Producing Large-Size AA 7055 Aluminum Alloy Ingots

2012 ◽  
pp. 333-337 ◽  
Author(s):  
Haitao Zhang ◽  
Jianzhong Cui ◽  
Hiromi Nagaumi
Keyword(s):  
Aluminum Alloy ◽  
New Approach ◽  
Large Size ◽  
7055 Aluminum Alloy

Cooperative Parallel Metaheuristics based Penguin Optimization Search for Solving the Vehicle Routing Problem

2016 ◽  
Vol 7 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Meryem Ammi ◽  
Salim Chikhi
Keyword(s):  
Vehicle Routing ◽  
Vehicle Routing Problem ◽  
Routing Problem ◽  
New Approach ◽  
Parallel Metaheuristics ◽  
Large Size ◽  
Benchmark Instances ◽  
Parallel Pattern ◽  
Optimization Search ◽  
Capacitated Vehicle

In this work the authors present a new approach based on the cooperation of many variants of metaheuristics in order to solve the large existing benchmark instances of the capacitated vehicle routing problem (CVRP). The proposed method follows the parallel pattern of the generalized island model (GIM). Consequently, the used metaheuristics, namely genetic algorithm (GA), the ant colony optimization (ACO), and the first application of the penguin optimization search (PEO) have been used to handle the large size of the CVRP. These optimization processes have been put over numerous islands that communicate via the process of exchanging solutions. Comparative studies as well as tests over the existing benchmark instances have been reported to prove the efficiency of the proposed approach.

scholarly journals A New Approach to Solve Perturbed Symmetric Eigenvalue Problems

2020 ◽  
Vol 14 ◽  
Keyword(s):  
Eigenvalue Problem ◽  
Dynamic Analysis ◽  
Eigenvalue Problems ◽  
Symmetric Polynomial ◽  
New Approach ◽  
Calculation Time ◽  
Polynomial Eigenvalue Problem ◽  
Large Size ◽  
Eigen Value ◽  
Symmetric Eigenvalue Problems

The objective of this study is to ef-ciently resolve a perturbed symmetric eigen-value problem, without resolving a completelynew eigenvalue problem. When the size of aninitial eigenvalue problem is large, its multipletimes solving for each set of perturbations can becomputationally expensive and undesired. Thistype of problems is frequently encountered inthe dynamic analysis of mechanical structures.This study deals with a perturbed symmetriceigenvalue problem. It propose to develop atechnique that transforms the perturbed sym-metric eigenvalue problem, of a large size, toa symmetric polynomial eigenvalue problem ofa much reduced size. To accomplish this, weonly need the introduced perturbations, the sym-metric positive-de nite matrices representing theunperturbed system and its rst eigensolutions.The originality lies in the structure of the ob-tained formulation, where the contribution of theunknown eignsolutions of the unperturbed sys-tem is included. The e ectiveness of the pro-posed method is illustrated with numerical tests.High quality results, compared to other existingmethods that use exact reanalysis, can be ob-tained in a reduced calculation time, even if theintroduced perturbations are very signi cant.

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