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Lung Segmentation in 4D CT Volumes Based on Robust Active Shape Model Matching

Gurman Gill, Reinhard R. Beichel
2015 International Journal of Biomedical Imaging  
Our approach is based on a 3D robust active shape model and extends it to fully utilize 4D lung image data sets.  ...  Also, the method can be easily expanded to process 4D CT data sets consisting of several volumes.  ...  Acknowledgments Gurman Gill contributed to the revision of this paper at Sonoma State University, CA. The authors thank Dr. Milan Sonka and Dr.  ... 
doi:10.1155/2015/125648 pmid:26557844 pmcid:PMC4618332 fatcat:o4uqzpktzjchdgvdcrvgjo6v2q

Numerical Investigation on Shape Optimization of Small-Spacing Twin-Well for Salt Cavern Gas Storage in Ultra-Deep Formation

Haitao Li, Jingen Deng, Qiqi Wanyan, Yongcun Feng, Arnaud Regis Kamgue Lenwoue, Chao Luo, Cheng Hui
2021 Energies  
A 3D geomechanical model considering the viscoelastic plasticity of the rock mass is introduced into Flac3D to numerically study the influence of internal gas pressure, cavern upper shape and well spacing  ...  The results show that the minimum internal gas pressure is no less than 14 MPa, and the cavern should not be operated under constant low gas pressure for a long time.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/en14102859 fatcat:nrmbdxpvqzh5faykhgsffj6nxi

Study on the Effect of Geometry and Configuration on the Seismic Performance of Base Isolator

Rambha K R, Alice T V
2015 International Journal of Engineering Research and  
The performance of the base isolator depends on the shear stiffness of the bearing. Geometry of the isolator is studied by choosing three geometries with different shape factors but same base area.  ...  The finite element software ANSYS was used to model the circular, square and rectangular models and subjected to non linear static analysis.  ...  Jangid Influence of isolator characteristics on the response of base-isolated structures, International Journal of Engineering Research & Technology (IJERT) ISSN: 2278-0181 www.ijert.org IJERTV4IS110206  ... 
doi:10.17577/ijertv4is110206 fatcat:yjtk5kzoebdobpmcz3luxvozny

Sensitivity of Mixed-Phase Cloud Optical Properties to Cloud Particle Model and Microphysical Factors at Wavelengths from 0.2 to 100 µm

Qing Luo, Bingqi Yi, Lei Bi
2021 Remote Sensing  
For the externally mixed cloud particles, the shapes of ice crystals were found to become more important as the ice volume fraction increases.  ...  The optical properties calculated by internally and externally mixed models are similar in the longwave spectrum, while the optical properties of the externally mixed model are more sensitive to variations  ...  Figures 14 and 15 show the bulk optical properties and scattering phase function of the internally mixed model, the externally mixed model, and the co-exist model, respectively.  ... 
doi:10.3390/rs13122330 fatcat:iiyvaf2babbbtbkqwf3wfypoyi

Computerized Planning of Prostate Cryosurgery and Shape Considerations

Purva Joshi, Anjali Sehrawat, Yoed Rabin
2017 Technology in Cancer Research and Treatment  
The quality of planning is measured by the overall defect volume, a proprietary concept which refers to undercooled areas internal to the target region and overcooled areas external to it.  ...  Results of this study numerically confirm that the overall defect volume decreases with an increasing number of cryoprobes, regardless of the geometry of the prostate.  ...  Shapes and Simplified Geometries of a Sphere and an Ellipsoid Having Equal Volumes, Using 14 Cryoprobes and Variable Insertion Depth Strategy. a Model Number Overall Defect, D min , % Mean Normal Distances  ... 
doi:10.1177/1533034617716041 pmid:28731368 pmcid:PMC5762061 fatcat:vcrd7eqa6jbpxc75u4kj4neju4

Effect of nanoparticle shape on the heat transfer and thermodynamic performance of a shell and tube heat exchanger

M.M. Elias, M. Miqdad, I.M. Mahbubul, R. Saidur, M. Kamalisarvestani, M.R. Sohel, Arif Hepbasli, N.A. Rahim, M.A. Amalina
2013 International Communications in Heat and Mass Transfer  
Different parameters such as particle size, shape, and volume concentration affect the performance of these systems.  ...  Boehmite alumina (γ-AlOOH) nanoparticles of different shapes were dispersed in a mixture of water/ethylene glycol as the nanofluid.  ...  The Maxwell model does not take the shape of particles into consideration.  ... 
doi:10.1016/j.icheatmasstransfer.2013.03.014 fatcat:xvchzrvpnfbcxemj2fzivzawuq

Constructal Optimizations for Heat and Mass Transfers Based on the Entransy Dissipation Extremum Principle, Performed at the Naval University of Engineering: A Review

Lingen Chen, Qinghua Xiao, Huijun Feng
2018 Entropy  
It includes constructal optimizations for heat generating volumes with tree-shaped and parallel channels, constructal optimization for heat generating volume cooled by forced convection, and constructal  ...  The results of the three parts show that the mean heat transfer temperature differences of the heat conduction assemblies are not always decreased when their internal complexity increases.  ...  Conflicts of Interest: The authors declare no conflict of interest. Entropy 2018, 20, 74  ... 
doi:10.3390/e20010074 pmid:33265159 fatcat:omdesaxgozbrtekthh3d6ah56i

Comparative Seismic Behaviour Study of Special Shaped Column Framed Reinforced Structure

Dhrupal S. Patel
2020 International Journal for Research in Applied Science and Engineering Technology  
G+9, 30m height of building analysed with different shape of column with equivalent cross section area of different shaped column.  ...  The objective of this study is in order to improve the performance of RCC framed Structure with rectangular columns with Different Shaped (Circular, Rectangle, T-Shape & I-Shape) Column under the Lateral  ...  Base 15 Shear (kN) in Z-Direction International Journal for Research in Applied Science & Engineering Technology (IJRASET) ISSN: 2321-9653; IC Value: 45.98; SJ Impact Factor: 7.429 Volume 8 Issue V  ... 
doi:10.22214/ijraset.2020.5112 fatcat:e42eshhly5ejhbmcoj233yuo5q

Performance Improvement of Flow Rate of Spiral Chip Feeder in Pulping Screw Unit

Ragini Narkhede, Prof. D. B. Sadaphale
2016 International Journal of Engineering Research and  
This work gives a list of possible modeling techniques, whether or not validated by experiments those are used for the different applications of the screw reactor.  ...  New product development shaped into conical screw feeding reactor with its shaft and flights design.  ...  From CAD data, derived volume of buckets (compartments) 36, 35, 31, 23.5, 19, 18, 18 litres as considered frustum zones and derived diameters from CAD model to get volume of buckets.  ... 
doi:10.17577/ijertv5is120050 fatcat:hw4g74l5obdcpmt2rkvarb74ha

FINITE ELEMENT BASED STATIC AND DYNAMIC ANALYSIS OF TENSAIRITY SPINDLE STRUCTURE

Beyons Thomas .
2015 International Journal of Research in Engineering and Technology  
deflections of the beam under different loading.Also determines load-displacement response of the spindle shaped Tensairity beam.  ...  In this paper finite element based static and dynamic analysis of spindle shaped Tensairity beam is studied.In this paper also includes the parametric studies and determine the natural frequencies and  ...  _______________ Volume: 04 Issue: 10 | Oct-2015, Available @ http://www.ijret.org Fig - 14 :Fig - 15 : 1415 Tensairity Deformation of Tensairity beam Volume: 04 Issue: 10 | Oct-2015, Available @ http  ... 
doi:10.15623/ijret.2015.0410017 fatcat:lnk3775cjzbrzp7gpvyme7oohe

Optimization of the structure of water axial piston pump and cavitation of plunger cavity based on the Kriging model

Shi-de Xiao, Ze-gang Sun, Ming-heng Xu, Wei Wei
2016 Journal of Vibroengineering  
The Kriging agent model of has been established by taking the configuration parameters of one-way inclined cylinder kidney shape port as independent variables and the mean value of the gas volume fraction  ...  The optimized structure of the one-way inclined type cylinder barrel kidney shape port is obtained through the Kriging agent model which is optimized by using improved genetic algorithm.  ...  Fig. 13 . 13 Comparison of the mean value of gas volume fraction of No. 1 plunger cavity under different Fig. 14.  ... 
doi:10.21595/jve.2016.16819 fatcat:njtpyypknfd67gulkuz7rrssfq

Weapon compartment layout design method for improving the survivability of a naval ship by considering susceptibility distribution based on radar cross section analysis

Joon-Tae Hwang, Suk-Yoon Hong, Jee-Hun Song, Hyun-Wung Kwon
2022 Journal of Computational Design and Engineering  
The survivability of a compartment can be calculated using the susceptibility distribution obtained using the axis-aligned bounding box (AABB) model and damage ellipsoid volume.  ...  In addition, the line distribution space division method was developed to extract the AABB model from the analysis model.  ...  For arranging a compartment in the internal space of a naval ship, the internal space distribution was determined according to the shape of the naval ship.  ... 
doi:10.1093/jcde/qwac012 fatcat:mi67kgfwdfb5bo6b3nz2t2i5eq

Internal Mismatch Stresses in Nickel-Based Superalloys : A Finite Element Approach

A. Hazotte, A. Racine, S. Denis
1996 Journal de Physique IV : Proceedings  
The analysis of stress/strain fields and elastic energy evolution as a function of precipitate morphology and volume fraction allows to explain some atypical precipitate shape changes such as "splitting  ...  F.E. calculations point out the specificity of stress/strain distributions in these alloys, in particular the fact that internal stresses concentrate in the connected y matrix.  ...  Acknowledgements The present study was performed in the frame of the french national research programme " Contrat de Programme de Recherche sur la Stabilitt Structurale des Superalliages Monocristallins  ... 
doi:10.1051/jp4:1996112 fatcat:ludlovq3srhdpcfsakwobjbr7y

Minimization of Torque Ripples in Multi-Stack Slotted Stator Axial-Flux Synchronous Machine by Modifying Magnet Shape

Zia Mahmood, Junaid Ikram, Rabiah Badar, Syed Sabir Hussain Bukhari, Madad Ali Ali Shah, Ali Asghar Memon, Mikulas Huba
2022 Mathematics  
The proposed AFPMSM model uses pentagon-shaped permanent magnets (PMs). It has a low value of cogging torque and torque ripples compared to the conventional model with a trapezoidal magnet shape.  ...  Additionally, it has increased internal generated voltage (Ef) as compared to the conventional model.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/math10101653 fatcat:hx5dijoksjhedeaotca4u6c2hu

Modeling the Effects of Myocardial Fiber Architecture and Material Properties on the Left Ventricle Mechanics during Rapid Filling Phase

Abdallah Hassaballah, Mohsen Hassan, Azizi Mardi, Mohd Hamdi
2015 Applied Mathematics & Information Sciences  
The objective of this research is to study the effects of myofiber volume fraction and fiber orientation on the deformation mechanics of left ventricular (LV) during diastole.  ...  of cardiac tissue, were embedded within the LV model.  ...  Ibrahim Mohamed Hassab-Allah, Department of Mechanical Engineering, Assiut University, for his helpful discussions.  ... 
doi:10.12785/amis/010121 fatcat:23m4sf2sezcvpp4dzr6ucawqde
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