Outputs (25)

Digital three-dimensional automation of the modified Huddart and Bodenham scoring system for patients with cleft lip and palate (2017)
Presentation / Conference Contribution
Ma, X., Martin, C., McIntyre, G., Lin, P., & Mossey, P. Digital three-dimensional automation of the modified Huddart and Bodenham scoring system for patients with cleft lip and palate

© Copyright 2017 American Cleft Palate-Craniofacial Association. Objective: The modified Huddart and Bodenham scoring system assesses maxillary arch constriction and surgical outcomes in cleft lip and palate. This project automates modified Huddart a... Read More about Digital three-dimensional automation of the modified Huddart and Bodenham scoring system for patients with cleft lip and palate.

The validity and reliability of an automated method of scoring dental arch relationships in unilateral cleft lip and palate using the modified Huddart-Bodenham scoring system (2016)
Journal Article
Martin, C. B., Ma, X., McIntyre, G. T., Wang, W., Lin, P., Chalmers, E. V., & Mossey, P. A. (2016). The validity and reliability of an automated method of scoring dental arch relationships in unilateral cleft lip and palate using the modified Huddart-Bodenham scoring system. European Journal of Orthodontics, 38(4), 353-358. https://doi.org/10.1093/ejo/cjw031

Objective: To evaluate an automated software tool for the assessment of dental arch relationships using the modified Huddart and Bodenham index. Design: Cohort of 43 models of subjects aged 9-21 with UCLP and the ten GOSLON reference models sets. Met... Read More about The validity and reliability of an automated method of scoring dental arch relationships in unilateral cleft lip and palate using the modified Huddart-Bodenham scoring system.

Subdivision surface fitting to a dense mesh using ridges and umbilics (2014)
Journal Article
Ma, X., Keates, S., Jiang, Y., & Kosinka, J. (2015). Subdivision surface fitting to a dense mesh using ridges and umbilics. Computer aided geometric design, 32(January), 5-21. https://doi.org/10.1016/j.cagd.2014.10.001

Fitting a sparse surface to approximate vast dense data is of interest for many applications: reverse engineering, recognition and compression, etc. The present work provides an approach to fit a Loop subdivision surface to a dense triangular mesh of... Read More about Subdivision surface fitting to a dense mesh using ridges and umbilics.

Non-uniform order mixed FEM approximation: Implementation, post-processing, computable error bound and adaptivity (2011)
Journal Article
Ainsworth, M., & Ma, X. (2012). Non-uniform order mixed FEM approximation: Implementation, post-processing, computable error bound and adaptivity. Journal of Computational Physics, 231(2), 436-453. https://doi.org/10.1016/j.jcp.2011.09.011

The present work provides a straightforward and focused set of tools and corresponding theoretical support for the implementation of an adaptive high order finite element code with guaranteed error control for the approximation of elliptic problems i... Read More about Non-uniform order mixed FEM approximation: Implementation, post-processing, computable error bound and adaptivity.

Shape preserving data reduction for 3D surface points (2011)
Journal Article
Ma, X., & Cripps, R. J. (2011). Shape preserving data reduction for 3D surface points. Computer aided design, 43(8), 902-909. https://doi.org/10.1016/j.cad.2011.03.006

In reverse engineering, vast amounts of point data captured by certain types of scanners significantly increase the complexity and reduce the efficiency in downstream activities, such as surface modelling and manufacturing. Data reduction has therefo... Read More about Shape preserving data reduction for 3D surface points.

Estimation of end curvatures from planar point data (2007)
Book Chapter
Ma, X., & Cripps, R. J. (2007). Estimation of end curvatures from planar point data. In R. Martin, M. Sabin, & J. Winkler (Eds.), Mathematics of Surfaces XII; Lecture Notes in Computer Science (307-319). Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-540-73843-5_19

Given a string of discrete planar points, the estimation of principal curvature vectors using circle fitting and Richardson’s extrapolation principle has been considered by several authors. However, these methods can not be directly applied to end po... Read More about Estimation of end curvatures from planar point data.

The Visualization System of CAD Drawing Workpiece (2003)
Journal Article
Nayonglin, Ma, X., Liu, S., & Zhang, G. (2003). The Visualization System of CAD Drawing Workpiece. Computer Simulation, 20(10), 102-104. https://doi.org/10.3969/j.issn.1006-9348.2003.10.034

This paper presents a visualization system that can complete the visualization process of CAD drawing workpieces. It introduces the four main functional modules of the visualization system: IGES file extraction and recognition, 3D reconstruction, gra... Read More about The Visualization System of CAD Drawing Workpiece.

Measuring information integration model for CAD/CMM (2003)
Journal Article
Ma, X., Zhang, G., Liu, S., & Wang, X. (2003). Measuring information integration model for CAD/CMM. Chinese Journal of Mechanical Engineering, 16(1), 59-61. https://doi.org/10.3901/cjme.2003.01.059

A CAD/CMM workpiece modeling system based on IGES file is proposed. The modeling system is implemented by using a method of labelling the tolerance items of 3D workpiece. The concept-feature face is used in the method. Firstly the CAD data of workpie... Read More about Measuring information integration model for CAD/CMM.

Automatic Recognition for the Position and Orientation of Parts in Intelligent CMMs (2003)
Journal Article
Ma, X. (2003). Automatic Recognition for the Position and Orientation of Parts in Intelligent CMMs. Yi qi yi biao xue bao = Chinese journal of scientific instrument, 24(2), 165-170. https://doi.org/10.3321/j.issn%3A0254-3087.2003.02.015

A method for automatic recognition of the position and orientation of parts based on machine vision and CAD 3D model is proposed Virtual image matching is used to confirm the position and orientation of the part By perspective imagery,virtual images... Read More about Automatic Recognition for the Position and Orientation of Parts in Intelligent CMMs.

Towards the intelligent CMM (2002)
Journal Article
Zhang, G. X., Liu, S. G., Ma, X. H., Wang, J. L., Wu, Y. Q., & Li, Z. (2002). Towards the intelligent CMM. CIRP Annals - Manufacturing Technology, 51(1), 437-442. https://doi.org/10.1016/S0007-8506%2807%2961555-8

'Intelligent' CMMs are likely to become the next generation of CMMs. In this paper the main features of an intelligent CMM are proposed. In operation, the geometric and measuring information of the part would be extracted from its CAD file. A measuri... Read More about Towards the intelligent CMM.