A Three-Dimensional Position Measuring System

Broken-ray Videometric Method and System for Measuring the Three-dimensional Position and Pose of the Non-intervisible Object

The traditional videometrics technique is usually adopted to measure the relative position and pose between the intervisible objects, and is invalid for measuring the three-dimensional position, pose and deformation of the non-intervisible target. An innovative broken-ray videometrics method is proposed to resolve the non-intervisible measurement problem. Broken-ray path is constructed by relay...

Indexing Method for Three-Dimensional Position Estimation

Indexing techniques usually are used in modelbased object recognition and ray tracing algorithms. In this paper we present a new method for estimating the threedimensional position of a subject (resp. object) in a circumscribed space based on an indexing method. We construct two and three-dimensional indices of a space, which are used to estimate the three-dimensional position by an interpolati...

Optical System for Measuring Position in Space

Three-Dimensional Image of A Communicating Uterus

Recent advances in reproductive medicine have created a demand for more accurate and safe imaging modalities before assisted reproductive treatment(ART) (1). Gradually, the important role of three-dimensional (3D) ultrasonography in the diagnosis of uterine congenital anomalies has been proved (2-4).

A three-dimensional steady-state tumor system

The growth of tumors can be modeled as a free boundary problem involving partial differential equations. We consider one such model and compute steady-state solutions for this model. These solutions include radially symmetric solutions where the free boundary is a sphere and nonradially symmetric solutions. Linear and nonlinear stability for these solutions are determined numerically.