2,071 Hits in 8.7 sec

Spiral cutting operation strategy for machining of sculptured surfaces by conformal map approach

Yu-Wen Sun, Dong-Ming Guo, Zhen-Yuan Jia
2006 Journal of Materials Processing Technology  
In this paper, a novel conformal map based and planar spiral guided spiral tool path generation method is described for NC machining of complex surfaces.  ...  Then through inversely mapping a planar spiral defined by a mathematical function into 3D physical space, the spiral cutter contact paths are derived without inheriting any corners on the boundary in the  ...  performance based tool path generation [8], contour-parallel offset machining [9] and boundary conformed tool path generation [10] .  ... 
doi:10.1016/j.jmatprotec.2006.05.004 fatcat:hgii6jejpzfinf2pxtb5miz23a

A classified bibliography of literature on NC milling path generation

D Dragomatz, S Mann
1997 Computer-Aided Design  
Recently, a large amount of new research related to numerical control (NC) tool path generation has appeared in the literature.  ...  Unfortunately, finding information on a particular topic can be difficult. Not only does path generation span several disciplines, but the material tends to vary both in content and focus.  ...  'Pocket machining based on contour-parallel tool paths generated by means of proximity maps' Comput.  ... 
doi:10.1016/s0010-4485(96)00060-7 fatcat:ba6wq5ah7veyxe7n27gokuvlai

Feedrate optimization for 2.5D milling operations
Optimizacija brzine pomoćnog kretanja u zahvatima 2.5 osnog glodanja

Branko Kokotović, Nikola Vorkapić
2019 FME Transaction  
Presented research is focused on CNC milling operations of planar contours with flat end mills.  ...  Paper presents a set of functions requred for processing the workpiece model and NC part program in order to reconstruction the instantneous area of workpiece engaged by the tool.  ...  Term optimization of feedrate is referring to entire toolpath (pocket or contour machining).  ... 
doi:10.5937/fmet1903613k fatcat:xza3rympi5e63l5d3uygtjz6oa

Process planning for robotic wire and arc additive manufacturing

Donghong Ding, Zengxi Pan, Dominic Cuiuri, Huijun Li
2015 2015 IEEE 10th Conference on Industrial Electronics and Applications (ICIEA)  
Robotic Wire Arc Additive Manufacturing (WAAM) refers to a class of additive manufacturing processes that builds parts from 3D CAD models by joining materials layerupon-layer, as opposed to conventional  ...  They kept me free of financial worries and provided the much needed assistance in my program over the last three years.  ...  The spiral tool-path generation, as shown in Figure 5 .4, has been widely applied in numerically controlled (NC) machining, especially for 2D pocket milling and uniform pocket cutting [98, 99] .  ... 
doi:10.1109/iciea.2015.7334441 fatcat:xdisv2wkxfdzdijqltmuoc3bn4

Energy distribution modulation by mechanical design for electrochemical jet processing techniques

Jonathon Mitchell-Smith, Alistair Speidel, Jennifer Gaskell, Adam T. Clare
2017 International journal of machine tools & manufacture  
by other means.  ...  in a difficult material to competitively machine by other means over large areas.  ... 
doi:10.1016/j.ijmachtools.2017.05.005 fatcat:slzs6x44abhmxhntdlzkrcigai

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

Iván Iglesias Sánchez, José Enrique Ares, Cristina González Gaya, Victor Rosales Prieto
2020 Applied Sciences  
tool path deviations with respect to the programmed path as in the case of robotic machining.  ...  This procedure can be extended to future factorial studies to improve the precision of robotic machining (in operations such as face milling, contouring, pocketing) and to establish design criteria for  ...  Acknowledgments: This work has been developed by AIMEN Technology Centre in the search for the development of new strategies of robotized machining in soft materials.  ... 
doi:10.3390/app10248885 fatcat:m57mzhsfhndbtetzp6gzau5bbm

Machine interpretation of CAD data for manufacturing applications

Qiang Ji, Michael M. Marefat
1997 ACM Computing Surveys  
In order to better understand the state of the art, methods of automated feature recognition are divided into the following categories of methods based on their approach: graphbased, syntactic pattern  ...  The purposes of this article are to review and summarize the development of research on machine recognition of features from CAD data, to discuss the advantages and potential problems of each approach,  ...  A pocket is usually machined by a milling cutter, which has a finite radius.  ... 
doi:10.1145/262009.262012 fatcat:zeyxraytzvf4rdkqokteb4fope

SU-E-T-169: Modification and Implementation of the RPC Heterogeneous Thorax Phantom for Verification of Proton Therapy Treatment Procedures

A Blatnica, G Ibbott, X Zhu, P Balter, R White, D Followill
2011 Medical Physics (Lancaster)  
The 512 by 512 .FIT images generated contain both OD values and spatial values, thus allowing them to be overlaid onto a corresponding CT slice or a dose map generated by Eclipse.  ...  The body of the phantom was contoured and a HU of 427.3 was selected based on the measured RLSP of PVC.  ... 
doi:10.1118/1.3612119 fatcat:kmqi6gykazdyhimf6pi6jxeqmm

Overview of Volume Rendering [chapter]

2005 Visualization Handbook  
If the machine has 3D texture capabilities, then one specifies a set of slicing planes parallel to the screen and composites the interpolated textures in depth order.  ...  By topologically sorting the critical points as a function of density one can construct a contour graph, contour tree, or Hyper Reeb Graph which yields a roadmap for an exploration of the volume [  ... 
doi:10.1016/b978-012387582-2/50009-5 fatcat:gthzcwcaanhuvhpmab7ii6r5fa

Stochastic Modeling of Distance to Collision for Robot Manipulators [article]

Nikhil Das, Michael C. Yip
2020 arXiv   pre-print
We also propose a confidence-based hybrid model that uses model-based predictions in regions of high confidence and switches to a more expensive sensor-based approach in other areas, and we demonstrate  ...  achieves 70 times faster distance evaluations compared to a standard geometric technique, and up to 13 times more accurate evaluations compared to other regression models, even when the GP is trained on  ...  One purpose of path optimization is to minimize a cost, such as path length, while satisfying constraints, such as keeping a certain distance from obstacles, given a motion plan generated by some other  ... 
arXiv:2005.14391v1 fatcat:y6xdfcciefb2ph6r66vn2nnvg4

ArcticAI: A Deep Learning Platform for Rapid and Accurate Histological Assessment of Intraoperative Tumor Margins [article]

Joshua Levy, Matthew Davis, Rachael Chacko, Michael Davis, Lucy Fu, Tarushii Goel, Akash Pamal, Irfan Nafi, Abhinav Angirekula, Brock Christensen, Matthew Hayden, Louis Vaickus (+1 others)
2022 medRxiv   pre-print
margins, resulting in a recurrence rate of less than one percent.  ...  Real-time assessment in many tumor types is constrained by tissue size and complexity and the time to process tissue and evaluate slides while a patient is under general anesthesia.  ...  Acknowledgements We would like to thank John Kim, Adnan Murtaza, Sagar Gupta, Sachin Satishkumar and Aryan Kumawat from the EDIT Machine Learning Summer program for initial explorations of 3D modeling  ... 
doi:10.1101/2022.05.06.22274781 fatcat:7lj74vmwhze75nllbanxxllfym

Indoor positioning and wayfinding systems: a survey

Jayakanth Kunhoth, AbdelGhani Karkar, Somaya Al-Maadeed, Abdulla Al-Ali
2020 Human-Centric Computing and Information Sciences  
This limitation hinders the implementation of GPS in indoor navigation systems, although it can be solved by using "high-sensitivity GPS receivers or GPS pseudolites" [4] .  ...  Radio frequency (RF) signals, computer vision, and sensor-based solutions are more suitable for tracking the users in indoor environments.  ...  This issue will make the navigation of people with VI more complicate. Normal D* algorithm generates the shortest path as a set of cells on the grid map.  ... 
doi:10.1186/s13673-020-00222-0 fatcat:m7lt5zdcjbbsvlh7fwatjvpx6y

Insights into Conformational Dynamics and Allostery in DNMT1-H3Ub/USP7 Interactions

Yu Zhu, Fei Ye, Ziyun Zhou, Wanlin Liu, Zhongjie Liang, Guang Hu
2021 Molecules  
targeting pockets for PPI-based allosteric drug design.  ...  In this work, based on the modeling structures of DNMT1-ubiquitylated H3 (H3Ub)/ubiquitin specific peptidase 7 (USP7) complexes, we have used a combination of elastic network models, molecular dynamics  ...  Conflicts of Interest: The authors declare no conflict of interest. Sample Availability: Not available.  ... 
doi:10.3390/molecules26175153 pmid:34500587 fatcat:f7dythskgfbengi76aiv6d47hy

Human-Robot Perception in Industrial Environments: A Survey

Andrea Bonci, Pangcheng David Cen Cheng, Marina Indri, Giacomo Nabissi, Fiorella Sibona
2021 Sensors  
The first one concerns fixed-base collaborative robots, and proposes a solution for human safety in tasks requiring human collision avoidance or moving obstacles detection.  ...  The paper also introduces two proofs of concept, developed by the authors for future collaborative robotic applications that benefit from enhanced capabilities of human perception and interaction.  ...  Proof of Concept for a collaborative fixed-base manipulator was mainly developed by A.B. and G.N. Proof of Concept for the collaborative Sen3Bot was mainly developed by F.S., P.D.C.C. and M.I.  ... 
doi:10.3390/s21051571 pmid:33668162 pmcid:PMC7956747 fatcat:zkneqhwbwvh7nigscwogcagbly

Mining scientific data [chapter]

Naren Ramakrishnan, Ananth Y. Grama
2002 Advances in Computers  
The past two decades have seen rapid advances in high performance computing and tools for data acquisition in a variety of scientific domains.  ...  We conclude by identifying opportunities for future research in emerging domains.  ...  (right) Clusters mined by the CHAMELEON algorithm based on similarity and proximity metrics [Karypis et al., 1999] . Figure courtesy G. Karypis (Univ.  ... 
doi:10.1016/s0065-2458(01)80028-0 fatcat:sbp5xai2yva2pcx3lj2sq64yma
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