scholarly journals Point Set Analysis: An Image Analysis Point of View for Rapid Prototyping Technologies

10.5772/20733 ◽  
2011 ◽  
Author(s):  
Nicolas Lomenie ◽  
Daniel Racoceanu ◽  
Georges Stamon
Keyword(s):  
Image Analysis ◽  
Rapid Prototyping ◽  
Point Of View ◽  
Point Set ◽  
Analysis Point

Quantitative Analysis of Microstructure and Modeling of Sintering

2009 ◽  
Vol 624 ◽  
pp. 1-18 ◽  
Author(s):  
Jean Marc Chaix
Keyword(s):  
Image Analysis ◽  
Input Data ◽  
3D Imaging ◽  
Point Of View ◽  
Size Distributions ◽  
Practical Point ◽  
The Past ◽  
Modeling Techniques ◽  
Mean Size ◽  
Sintering Mechanisms

Microstructure is the key scale to understand and describe sintering mechanisms and their consequences at the macroscopic level. As modeling techniques are continuously developing, the need for input data and comparison with more and more accurate descriptions of the evolution is expected to create a growing demand for quantitative microstructure data. Image analysis is the classic way to get these data. This paper reviews the practical use and progresses of this old technique in the sintering literature during the past and recent years. The place of basic tools and more recent ones, such as 3D imaging, are discussed from a practical point of view accounting from sintering models needs: mean size and size distributions in pores and grains, homogeneity, sintering trajectories…

scholarly journals HURWITZ THEOREM AND PARALLELIZABLE SPHERES FROM TENSOR ANALYSIS

2001 ◽  
Vol 16 (25) ◽  
pp. 4207-4222 ◽  
Author(s):  
J. A. NIETO ◽  
L. N. ALEJO-ARMENTA
Keyword(s):  
Clifford Algebra ◽  
Point Of View ◽  
Tensor Analysis ◽  
Tensor Algebra ◽  
Normed Algebra ◽  
Curved Spaces ◽  
Hurwitz Theorem ◽  
Analysis Point

By using tensor analysis, we find a connection between normed algebras and the parallelizability of the spheres S 1, S 3 and S 7. In this process, we discovered the analog of Hurwitz theorem for curved spaces and a geometrical unified formalism for the metric and the torsion. In order to achieve these goals we first develop a proof of Hurwitz theorem based on tensor analysis. It turns out that in contrast to the doubling procedure and Clifford algebra mechanism, our proof is entirely based on tensor algebra applied to the normed algebra condition. From the tersor analysis point of view our proof is straightforward and short. We also discuss a possible connection between our formalism and the Cayley–Dickson algebras and Hopf maps.

Face, Image, and Analysis

2010 ◽  
pp. 1-15
Author(s):  
Yu-Jin Zhang ◽  
Yu-Jin Zhang ◽  
J.L. Molina ◽  
R. Giordano ◽  
J. Bromley
Keyword(s):  
Image Analysis ◽  
Face Image ◽  
Research Topic ◽  
Point Of View ◽  
Research Development ◽  
Technical Point ◽  
Face Image Analysis ◽  
Human Faces ◽  
General Technical

Face image analysis, consisting of automatic investigation of images of (human) faces, is a hot research topic and a fruitful field. This introductory chapter discusses several aspects of the history and scope of face image analysis and provides an outline of research development publications of this domain. More prominently, different modules and some typical techniques for face image analysis are listed, explained, described, or summarized from a general technical point of view. One picture of the advancements and the front of this complex and prominent field is provided. Finally, several challenges and prominent development directions for the future are identified.

Fuzzy Logic Applied to Biomedical Image Analysis

2011 ◽  
pp. 710-718 ◽  
Author(s):  
Alfonso Castro ◽  
Bernardino Arcay
Keyword(s):  
Fuzzy Logic ◽  
Image Analysis ◽  
Fuzzy Clustering ◽  
Intelligent Systems ◽  
Clustering Algorithms ◽  
Kernel Functions ◽  
Point Of View ◽  
Industrial Robots ◽  
Biomedical Image ◽  
Research Areas

Ever since Zadeh established the basis of fuzzy logic in his famous article Fuzzy Sets (Zadeh, 1965), an increasing number of research areas have used his technique to solve and model problems and apply it, mainly, to control systems. This proliferation is largely due to the good results in classifying the ambiguous information that is typical of complex systems. Success in this field has been so overwhelming that it can be found in many industrial developments of the last decade: control of the Sendai train (Yasunobu & Miyamoto, 1985), control of air-conditioning systems, washing machines, auto-focus in cameras, industrial robots, etc. (Shaw, 1998) Fuzzy logic has also been applied to computerized image analysis (Bezdek & Keller & Krishnapuram & Pal, 1999) because of its particular virtues: high noise insensitivity and the ability to easily handle multidimensional information (Sutton & Bezdek & Cahoon, 1999), features that are present in most digital images analyses. In fuzzy logic, the techniques that have been most often applied to image analysis have been fuzzy clustering algorithms, ever since Bezdek proposed them in the seventies (Bezdek, 1973). This technique has evolved continuously towards correcting the problems of the initial algorithms and obtaining a better classification: techniques for a better initialization of these algorithms, and algorithms that would allow the evaluation of the solution by means of validity functions. Also, the classification mechanism was improved by modifying the membership function of the algorithm, allowing it to present an adaptative behaviour; recently, kernel functions were applied to the calculation of memberships. (Zhong & Wei & Jian, 2003) At the present moment, applications of fuzzy logic are found in nearly all Computer Sciences fields, it constitutes one of the most promising branches of Artificial Intelligence both from a theoretic and commercial point of view. A proof of this evolution is the development of intelligent systems based on fuzzy logic. This article presents several fuzzy clustering algorithms applied to medical images analysis. We also include the results of a study that uses biomedical images to illustrate the mentioned concepts and techniques.

scholarly journals Yohkoh Observations of Coronal Structures Surrounding Dark Filaments

1998 ◽  
Vol 167 ◽  
pp. 163-170
Author(s):  
Yutaka Uchida
Keyword(s):  
Image Analysis ◽  
High Latitude ◽  
Dynamic Range ◽  
High Sensitivity ◽  
Event Structure ◽  
Point Of View ◽  
Coronal Structure ◽  
Wide Dynamic Range ◽  
Proper Understanding ◽  
Coronal Structures

AbstractWe describe in this paper some of the findings of the Yohkoh satellite about the coronal structure surrounding dark filaments in the pre-event and initial phases of high latitude arcade formation events. The knowledge of pre-event structure and its change is essential for the proper understanding of the arcade flaring process from the causality point of view. The wide dynamic range and high sensitivity obervations by Yohkoh allow us to look into the faint structures and their changes with the use of a faint-feature-enhancing technique in the image analysis.

scholarly journals Effects of N, P, K and S application on yield and quality of white jute (Corchorus capsularis L.) var. BJC-2197

2012 ◽  
Vol 21 (2) ◽  
pp. 109-116
Author(s):  
Sayma Khanom ◽  
Sonia Hosssain ◽  
Shahid Akhtar Hossain
Keyword(s):  
Growth Yield ◽  
Quality Parameters ◽  
Point Of View ◽  
Corchorus Capsularis ◽  
Yield And Quality ◽  
S Application ◽  
Positive Effect ◽  
S Fertilizers ◽  
Analysis Point

A field experiment was conducted at Bangladesh Jute Research Institute (BJRI) to observe the response of N, P, K and S on a pre?released white jute (Corchorus capsularis) var. BJC?2197. The experiment was carried out by applying N, P, K, S fertilizers in ten combinations including control. From the experiment it was observed that all the treatments had significant positive effect over control on growth, yield and quality parameters. The highest fiber yield (3.21 t/ha) and stick yield (6.58 t/ha) were recorded with N90P5K30S10 kg/ha treatment. However, the best quality fiber was found with combination of N90P15K30S10 kg/ha treatment. From the economic analysis point of view, it was found that combination of N90P5K30S10 kg/ha was higher (2.30) than N90P15K30S10 kg/ha (2.04). So the former can be considered as the best combination for var. BJC?2197 in terms of BCR, yield and quality. Dhaka Univ. J. Biol. Sci. 21(2): 109?116, 2012 (July) DOI: http://dx.doi.org/10.3329/dujbs.v21i2.11508

The shape of a pendant liquid drop

1979 ◽  
Vol 292 (1391) ◽  
pp. 307-340 ◽  
Keyword(s):  
Liquid Drop ◽  
Equilibrium Configuration ◽  
Vertical Section ◽  
Weak Form ◽  
Point Of View ◽  
Isolated Singularity ◽  
Double Points ◽  
Circular Arcs ◽  
Point Set ◽  
Formal Solutions

A characterization, is given for the most general equilibrium configuration of a symmetric pendent liquid drop. It is shown that for any vertex height u 0 the vertical section can be continued globally as an analytic curve, without limit sets or double points. For small |u 0 | it is proved the section projects simply on the axis u = 0; for large |u 0 | the section is shown to have near the vertex the general form of a succession of circular arcs joined near the axis by small arcs of large curvature. The section contracts at first toward a certain hyperbola, the 'circular arcs’ gradually changing shape but remaining, until a certain fixed height (asymptotically as u 0 — ∞), within a narrow band surrounding the hyperbola. The continuation of the section eventually projects simply on u = 0, separates from the hyperbola, and continues in an oscillatory manner to infinity. The properties described above are studied quantitatively. It is conjectured that as |u 0 | -> ∞ the section converges uniformly (as a point set) to a solution U(r) with simple projection (for all r > 0 ) on = 0 and an isolated singularity at r = 0. A preliminary (weak) form of the conjecture is proved. The (liquid drop) solutions are also studied from the point of view of their global embedding in the manifold of all formal solutions of the equations. From this point of view, the vertex of the drop appears as a transition point marking a change in qualitative appearance. It is conjectured that the only global solution without double points, in this extended sense, is the singular solution referred to above.

Economic Efficiency of Using Rapid Prototyping Technology

2013 ◽  
Vol 371 ◽  
pp. 210-214 ◽  
Author(s):  
Cristina Gavrus
Keyword(s):  
Rapid Prototyping ◽  
Economic Efficiency ◽  
Fused Deposition Modeling ◽  
Plastic Material ◽  
New Technology ◽  
Point Of View ◽  
Fused Deposition ◽  
Small Series ◽  
Deposition Modeling ◽  
Working Principle

The present paper approaches the issue of using the new technology of Rapid Prototyping [1,2] in product engineering and tries to demonstrate its economic efficiency from the point of view of costs, in comparison with other technologies [. The comparison is made between Rapid Prototyping and plastic material injection. Rapid Prototyping is used for obtaining some prototypes but it also can be successfully used for individual or small series production. The background of the work briefly presented in this paper is related to some experimental research developed by the author regarding Rapid Prototyping Technologies for certain products which are belt pulleys. After the products have been physically created using Rapid Prototyping Technologies, the author was interested in quantifying its economic efficiency. The belt pulley the present paper refers to was obtained by using the Rapid Prototyping Technology FDM (Fused Deposition Modeling [).The working principle of this technology is briefly described later in this paper. As a novelty, the present paper is aiming at determining a criterion that allows a company to choose between the two technologies mentioned above.

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