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- Marcella A. Chamberlain, Ajay Joneja, Tien-Chien Chang
- Computer-Aided Design
- 1993

- Kai Tang, Ajay Joneja
- Computer-Aided Design
- 2003

A simple and linear-time algorithm is presented for solving the problem of traversing a machining graph with minimum retractions encountered in zigzag pocket machining and other applications. This algorithm finds a traversal of the machining graph of a general pocket P with Nh holes, such that the number of retractions in the traversal is no greater than… (More)

- Yong-Jin Liu, Xi Luo, Ajay Joneja, Cui-Xia Ma, Xiaolan Fu, Dawei Song
- IEEE Transactions on Automation Science and…
- 2013

3-D CAD models are an important digital resource in the manufacturing industry. 3-D CAD model retrieval has become a key technology in product lifecycle management enabling the reuse of existing design data. In this paper, we propose a new method to retrieve 3-D CAD models based on 2-D pen-based sketch inputs. Sketching is a common and convenient method for… (More)

- Yong-Jin Liu, Kai Tang, Ajay Joneja
- Computer-Aided Design
- 2007

In this paper, a new dynamic developable surface model is proposed. The proposed model represents developable surfaces using triangle meshes. A novel algorithm is proposed to introduce the Hamilton principle into these meshes such that the resulting developable model is dynamic, i.e., it can offer a time-dependent continuous path to deform the model.… (More)

- Fu Jing, Ajay Joneja, Kai Tang
- Computer-Aided Design
- 2005

We describe two new shape operators that superimpose wrinkles on top of a smooth NURBS surface. Previous research studying wrinkles focused mostly on cloth modeling or in animations, which are driven more by visual realism, but allow large elastic deformations. Our operators generate wrinkle-shaped deformations in a region of a smooth surface along a given… (More)

- Yong-Jin Liu, Kai Tang, Ajay Joneja
- Computers & Graphics
- 2005

In this paper, we present a feature-based free-form shape modelling technique based on solving a fundamental problem of reconstructing the depth information from 2D sketch planes. First, to mathematically define the problem with the human perception, the proposed technique (1) formulates the 2D shaded regions on sketches by a hybrid thin plate surface model… (More)

- Xiangzhi Wei, Ajay Joneja, David M. Mount
- Computer-Aided Design
- 2012

Polygon partitioning is an important problem in computational geometry with a long history. In this paperwe consider the problem of partitioning a polygonwith holes into aminimumnumber of uniformly monotone components allowing arbitrary Steiner points. We call this the MUMC problem.We show that, given a polygon with n vertices and h holes and a scan… (More)

- Hongwei Lin, Kai Tang, Ajay Joneja, Hujun Bao
- Computer-Aided Design
- 2007

In this paper, we present a BPM (Bézier Patch Mapping) algorithm which generates a strictly non-self-overlapping structured quadrilateral grid in a given four-sided planar region. Given four pieces of polynomial curves which enclose a simple region in the plane, the algorithm first constructs a Bézier patch which interpolates the four curves (as its four… (More)

- Zhiyang Yao, Ajay Joneja
- 2009

High speed milling (HSM) has great potential use in die/mold cutting, but traditional machining plans do exploit HSM capabilities effectively. An important consideration for in HSM is to limit cutting force variations, and one way to do so is to reduce Cutter-Workpiece engagement (CWE) variations. CWE is measured as the area of the tool instantaneously… (More)

- Ajay Joneja
- 2004

Mass customization is a dominant new trend in modern manufacturing, whereby industries are required to produce umpteen variations of products at costs approaching those achievable in mass production. Among the methods to tackle this demand is development of flexible tooling which operates at high throughput rates. A suite of such tools called MPATS (a… (More)