Results 41 to 50 of about 55,618 (308)

Path planning of shearer up-drum based on virtual coal-rock interface

Gong-kuang zidonghua, 2016
For the problem of shearer up-drum cutting rock in roof in the region where coal-rock interface is bended, a path planning method of shearer up-drum based on virtual coal-rock interface was proposed.
DONG Gang, MA Hongwei, NIE Zhen
doaj   +1 more source

Evolutionary Algorithms for Optimization Sequence of Cut in the Laser Cutting Path Problem

Applied Sciences, 2023
Efficiently cutting smaller two-dimensional parts from a larger surface area is a recurring challenge in many manufacturing environments. This point falls under the cut-and-pack (C&P) problems.
Bonfim Amaro Junior, Guilherme Nepomuceno de Carvalho, Marcio Costa Santos, Placido Rogerio Pinheio, Joao Willian Lemos Celedonio   +4 more
doaj   +1 more source

Metaheuristics for the Minimum Time Cut Path Problem with Different Cutting and Sliding Speeds [PDF]

Algorithms, 2021
The problem of efficiently cutting smaller two-dimensional pieces from a larger surface is recurrent in several manufacturing settings. This problem belongs to the domain of cutting and packing (C&P) problems. This study approached a category of C&P problems called the minimum time cut path (MTCP) problem, which aims to identify a sequence of ...
Bonfim Amaro Júnior, Marcio Costa Santos, Guilherme Nepomuceno de Carvalho, Luiz Jonatã Pires de Araújo, Plácido Rogério Pinheiro   +4 more
openaire   +3 more sources

Effect of grain angle on the strain distribution during orthogonal cutting of hinoki (Chamaecyparis obtusa) measured using a digital image correlation method

Journal of Wood Science, 2019
The strain associated with orthogonal cutting with and against the grain of hinoki (Chamaecyparis obtusa) was measured. Digital image correlation method was used to measure strain distributed in the area within 0.5 mm of the cutting edge.
Yosuke Matsuda, Yuko Fujiwara, Yoshihisa Fujii   +2 more
doaj   +1 more source

A New Approach to the Consideration and Analysis of Critical Factors in Robotic Machining

Applied Sciences, 2020
The relative low stiffness of industrial robots is a major limitation on the development of flexible and reconfigurable systems in applications in which process forces and vibration lead into significant tool path deviations with respect to the ...
Iván Iglesias Sánchez, José Enrique Ares, Cristina González Gaya, Victor Rosales Prieto   +3 more
doaj   +1 more source

Canonical cuts of path powers

Contributions to Discrete Mathematics
The MaxCut problem aims to find a bipartition of vertices in a given graph such that the number of edges with one end vertex in each part is maximum among all bipartitions. NP-hardness when restricted to interval graphs has been recently announced. Surprisingly, all previously published attempts at polynomial-time algorithms for unit interval graphs ...
Alcon, Liliana, Faria, Luerbio, de Figueiredo, Celina M. H., Gutierrez, Marisa, Klein, Sulamita, Dutour Sikirić, Mathieu, Souza, Ueverton S., Sucupira, Rubens A.   +7 more
openaire   +2 more sources

Research on the roadheader cutting control system based on convolutional neural network and fuzzy PID

Gong-kuang zidonghua
In response to the insufficient adaptability and low system stability of cantilever roadheader when facing changes in coal and rock hardness during tunneling, a roadheader cutting control system based on convolutional neural networks (CNN) and fuzzy PID ...
LI Yingna, CUI Yanping, AN Boshuo, LIU Baijian, JIN Jianwei   +4 more
doaj   +1 more source

Minimizing airtime by optimizing tool path in computer numerical control machine tools with application of A* and genetic algorithms

Advances in Mechanical Engineering, 2017
Research on tool path planning has been limited to minimize airtime by optimizing tool travel path in one machining plane without obstacles. To address this limitation, a method for tool path optimization that exploits A* and genetic algorithms to find ...
Naveen Senniappan Karuppusamy, Bo-Yeong Kang   +1 more
doaj   +1 more source

Interpreting the effects of DNA polymerase variants at the structural level

Molecular Oncology, EarlyView.
Using MAVISp and molecular dynamics simulations, we analyzed over 60 000 missense variants in POLE and POLD1 from ClinVar, COSMIC, cBioPortal, and saturation mutagenesis. Identified mechanistic indicators, including stability, binding, and long‐range, enable structural interpretation, providing ACMG‐like evidence for possible reclassification of VUS ...
Matteo Arnaudi, Karolina Krzesińska, Ludovica Beltrame, Pablo Sánchez‐Izquierdo Besora, Matteo Tiberti, Mef Nilbert, Anna Rohlin, Elena Papaleo   +7 more
wiley   +1 more source

Adaptive intelligent cutting technology of the shearer based on the high-precision three-dimensional dynamic geological model

矿业科学学报, 2023
If the shearer is cutting coal using the "memory cutting" technique, a manual demonstration is required.The memory cutting technology has higher requirements on the reserving conditions of coal seams.When the coal seam fluctuates greatly, frequent manual
Hou Yunbing, Zhang Hong, Mao Shanjun, Sun Zhenming, Li Mei, Chen Huazhou   +5 more
doaj   +1 more source