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The flexure hinge is a key component for designing compliant mechanisms that have been widely used in precision engineering which high positioning accuracy is demanded. This paper presents a systematic method for designing flexure hinges by using the topology optimization method. An optimization model is developed by equally considering the following three objectives: (I) maximizing the compliance...
This paper presents a method for the square detection based on distance distribution of the edge points of the image. The orientation line of the edge point is defined first, then for each pixel of the image, the distances between the pixel and the orientation lines of the edge points in the defined neighborhood of the pixel are computed to obtain the feature length and feature energy of the pixel,...
Recently great progress has been made in the field of region detecting and matching. However, an extra step, fitting the irregular regions into fixed shapes, must be implemented in advance when constructing these descriptors on irregular regions. This shape fitting step can cause great errors, and thus will result in poor matching. In this paper, a method for irregular regions automatic matching is...
In this paper, we present a 3D X-Ray Transform based feature extraction and classification method for Digital Multi-focal Images (DMI). In such images, morphological information for a transparent specimen can be captured in the form of a stack of high-quality images, representing individual focal planes through the specimen's body. We present a method that can effectively exploit the entire information...
The Shoot Apical Meristem (SAM) is made of stem cells that are responsible for all above ground plant structures. Differentiating cells in the development of SAM form primordia. Primordia develop to become various plant organs. Understanding the growth dynamics of primordia is critical to understanding the developmental dynamics of the entire SAM. We present a method for performing quantitative analysis...
Feature matching plays an important role in many applications, including 3D reconstruction, object recognition and video understanding. Point matching has made great progress recently, while it has made little progress in the fields of line and curve matching. By computing statistics of point descriptors constructed at each edge points, this paper develops a novel method for extending point descriptors...
In this paper, we present a 3D X-Ray Transform based multilinear feature extraction and classification method for Digital Multi-focal Images (DMI). In such images, morphological information for a transparent specimen can be captured in the form of a stack of high-quality images, representing individual focal planes through the specimen's body. We present a method that can effectively exploit the entire...
We explore radiation of a line source within a parabolic cylinder made of left-handed metamaterials. The far field radiation patterns show the metamaterial parabolic cylinder can enhance the directivity of the line source radiation. It is found that the focal length and the feature length of the parabola affect the directivity. Further improvement of the directivity is realized by changing the shape...
The work presents analysis and simulations for apertures of square, rectangle and round shape on the cylinder. For a single slot, the coupling transmission coefficient (CTC) of square and round shape slot are similar to each other and have a frequency-related fluctuating uprising tendency, when long side of a vertical rectangle is a little smaller than the half wavelength, the coupling energy through...
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