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2D-3D fusion for layer decomposition of urban facades

Yangyan Li, Qian Zheng, Andrei Sharf, Daniel Cohen-Or, Baoquan Chen, Niloy J. Mitra
2011 2011 International Conference on Computer Vision  
We present a method for fusing two acquisition modes, 2D photographs and 3D LiDAR scans, for depth-layer decomposition of urban facades.  ...  We decompose the input photographs into rectangular planar fragments and diffuse depth information from the corresponding 3D scan onto the fragments by solving a multi-label assignment problem.  ...  We would like to thank Guowei Wan for initial experiments on this project and Dror Aiger for inspiring discussions. This work was supported in part by NSFC (60902104, 61025012, 61003190  ... 
doi:10.1109/iccv.2011.6126329 dblp:conf/iccv/LiZSCCM11 fatcat:nn7hwjrpcrcqxcvxmzqhkbs56a

Transit Frequency Setting Problem with Demand Uncertainty [article]

Xiaotong Guo, Shenhao Wang
2022 arXiv   pre-print
To address the computation complexity in both extended models under large-scale demand matrices, a Bender decomposition algorithm and two dimension reduction techniques are designed.  ...  Public transit systems are the backbone of efficient and sustainable urban mobility systems in the era of urbanization.  ...  There are several applications for applying SP or RO techniques to solving urban mobility problems. For transit systems, Yan et al.  ... 
arXiv:2204.12666v1 fatcat:orfjafiw2nhunpwwmaq6zcblty

Grammar-based 3D facade segmentation and reconstruction

Guowei Wan, Andrei Sharf
2012 Computers & graphics  
We present an algorithm for reconstruction of 3D polygonal models from scanned urban facades.  ...  Recent advances in scanning technologies allow large-scale scanning of urban scenes.  ...  modeling techniques.  ... 
doi:10.1016/j.cag.2012.02.003 fatcat:hsptrymrgzdq3ip27pvmfsanhq

Determinant of Income Inequality in Ethiopia: Regression Based Inequality Decomposition

Gizachew Mengesha
2019 European Business & Management  
The employment, the occupation and the race are also having a great contribution for the inequality of income.  ...  This studies focusing on investigating the determinant of inequality in Ethiopia by using the raw data collected from central Stastical authority based on the regression decomposition of field's methodology  ...  On the other hand, for the other urban category, a three stage stratified sampling technique was carried out.  ... 
doi:10.11648/j.ebm.20190503.12 fatcat:mdii2ppml5ht5bqohxsttasej4

The cityseer Python package for pedestrian-scale network-based urban analysis [article]

Gareth D. Simons
2021 arXiv   pre-print
It is underpinned by network-based methods developed from the ground-up for localised urban analysis at the pedestrian scale to provide contextually specific metrics for any given street-front location  ...  Aggregations are computed dynamically -- directly over the street network while taking the direction of approach into account -- and can optionally incorporate spatial impedances and network decomposition  ...  Summary The cityseer-api Python package addresses a range of issues specific to computational workflows for urban analytics from an urbanist's point of view and contributes a combination of techniques  ... 
arXiv:2106.15314v2 fatcat:xq5my2er2zfwtk5rqmuhxd26ci

Upgrading Wastewater Treatment Plant to Obtain Drinking Water

Djamel Ghernaout, Noureddine Elboughdiri
2019 OALib  
Evidently, there is an additional cost for these sophisticated techniques to pay for the better future of the humankind.  ...  only considered as the final issue in the case of hard shortage situations for security reasons.  ...  Most importantly, these comparative examinations concluded that: 1) Consolidated advanced urban wastewater treatment techniques, to be spe- cific AC adsorption, ozonation, and filtration by nanofiltration  ... 
doi:10.4236/oalib.1105959 fatcat:bnfdubvpdjbqnl77d5s5utfmii

Monitoring tropical peat related settlement using ISBAS InSAR, Kuala Lumpur International Airport (KLIA)

Chris Marshall, David J. Large, Ahmed Athab, Stephanie L. Evers, Andrew Sowter, Stuart Marsh, Sofie Sjögersten
2018 Engineering Geology  
This pressure has led to sites on tropical peatland previously considered unsuitable for development to be revisited.  ...  One such site, the KLIA2 terminal and runway, Kuala Lumpur International Airport which opened in May 2014 at a cost of 3.6 billion MYR has been beset by well documented subsidence problems.  ...  Thanks are also due to Henk Pieter Sterk, Martha Ledger and Geomatic Ventures Ltd. for assistance in preparing Sentinel I data for ISBAS processing and analysis.  ... 
doi:10.1016/j.enggeo.2018.07.015 fatcat:l2y4ntq3c5dlvjxl2ramvuoe4u

Accounting for Inequality in India: Evidence from Household Expenditures

J. Salcedo Cain, Rana Hasan, Rhoda Magsombol, Ajay Tandon
2010 World Development  
It is crucial to point out that decomposition techniques provide a description of how various household characteristics are related to inequality. Decomposition results do not imply causation.  ...  This problem can be alleviated by keeping the analysis poverty and inequality of urban and rural areas separate.  ...  Its main instruments for helping its developing member countries are policy dialogue, loans, equity investments, guarantees, grants, and technical assistance.  ... 
doi:10.1016/j.worlddev.2009.11.014 fatcat:tkn3ddh3tnffvc6tjecrsu2cxe

How Does Environmental Regulation Affect Carbon Emissions? —Evidence from China

Shaobing Wang
2019 Journal of Geoscience and Environment Protection  
Based on the decomposition results, the effects of different environmental regulation on carbon emission increment and its decomposition effect were studied by using multiple regression methods.  ...  In this paper, the increment of CO 2 emissions from 285 prefecture-level cities in China from 2004 to 2013 is decomposed into scale effect, composition effect and technique effect.  ...  Third, in terms of technique effects, environmental regulations for CO 2 have significantly reduced urban carbon emissions, while environmental regulations for SO 2 have increased urban carbon emissions  ... 
doi:10.4236/gep.2019.711012 fatcat:dgg7sx6zpzecteto32puhjlp6m

Shrinking Large-Scale Population-Projection Models by Aggregation and Decomposition

A Rogers
1976 Environment and planning A  
In such instances, a more efficient and effective shrinking technique often can be developed using decomposition methods.  ...  Decompositions of large-scale problems generally proceed in two stages.  ... 
doi:10.1068/a080515 fatcat:emgqt64pjjfhxi2dd5yudlv5k4

Some geotechnical aspects of bioreactor landfills

Gabriella Varga
2011 Periodica polytechnica. Civil engineering  
Our model divided the waste body into five layers according to the degree of decomposition. Three different geometries were simulated.  ...  degradation · factor of safety · slope stability · Plaxis · Geoslope Acknowledgement The support of the National Research Fund Jedlik Ányos NKFP B1 2006 08 and the Norwegian research fund HU-0121 was used for  ...  In bioreactor landfills the time needed for total consolidation decreases while the amount and the quality of biogas increases.  ... 
doi:10.3311/pp.ci.2011-1.05 fatcat:ae4fgh3e4ra7fbakwylhvcmnae

Identifying Population Movements with Non-Negative Matrix Factorization from Wi-Fi User Counts in Smart and Connected Cities [article]

Michael Huffman, Armen Davis, Joshua Park, James Curry
2021 arXiv   pre-print
Non-Negative Matrix Factorization (NMF) is a valuable matrix factorization technique which produces a "parts-based" decomposition of data sets.  ...  Wi-Fi user counts are a privacy-preserving indicator of population movements in smart and connected urban environments.  ...  CONCLUSION NMF was chosen as a decomposition for this data due to its high interpretability.  ... 
arXiv:2111.10459v1 fatcat:ynjwl3swzfbydjz4wpsoaletqy

Modelling city logistics using recent innovative technologies

Eiichi Taniguchi, Russell G. Thompson, Ali G. Qureshi
2020 Transportation Research Procedia  
Advances in autonomous and electric freight vehicles have good potential for improving the efficiency and sustainability of urban freight systems.  ...  Advances in autonomous and electric freight vehicles have good potential for improving the efficiency and sustainability of urban freight systems.  ...  They proposed a large neighbourhood search-based metaheuristic to solve the E2EVRP and an exact mathematical programming algorithm, which uses a decomposition technique and problem-tailored pricing algorithms  ... 
doi:10.1016/j.trpro.2020.03.157 fatcat:a6xf7wtzszbclfzmeorv3aqrx4

Adaptive partitioning of urban facades

Chao-Hui Shen, Shi-Sheng Huang, Hongbo Fu, Shi-Min Hu
2011 Proceedings of the 2011 SIGGRAPH Asia Conference on - SA '11  
Abstract Automatically discovering high-level facade structures in unorganized 3D point clouds of urban scenes is crucial for applications like digitalization of real cities.  ...  However, this problem is challenging due to poor-quality input data, contaminated with severe missing areas, noise and outliers.  ...  Acknowledgements We thank the anonymous reviewers for their constructive comments. The LiDAR scans in Figure 1  ... 
doi:10.1145/2070752.2024218 fatcat:dhkwodpnyncardpwxnlagds74e

Adaptive partitioning of urban facades

Chao-Hui Shen, Shi-Sheng Huang, Hongbo Fu, Shi-Min Hu
2011 Proceedings of the 2011 SIGGRAPH Asia Conference on - SA '11  
Abstract Automatically discovering high-level facade structures in unorganized 3D point clouds of urban scenes is crucial for applications like digitalization of real cities.  ...  However, this problem is challenging due to poor-quality input data, contaminated with severe missing areas, noise and outliers.  ...  Acknowledgements We thank the anonymous reviewers for their constructive comments. The LiDAR scans in Figure 1  ... 
doi:10.1145/2024156.2024218 fatcat:dq65yvgdyvg3nfgvg6ajyz5ghu
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