Volume 3 Issue 10
Authors: Zhenbao Huang; Yang Chen
Abstract: This paper first introduces the concept of fundamental matrix, and analyzes the feasibility of estimating fundamental matrix from corresponding points. Then the basic eight-point algorithm is introduced, and two methods with input data normalization are described, which are the anisotropy method and the isotropy method. With the using of normalization method, the precision of fundamental matrix estimated from eight-point algorithm will be greatly improved. The final experiment confirms this improvement and compares the performance of the two normalization methods.
Keywords: Fundamental Matrix; Eight-Point Algorithm; Normalized Eight-Point Algorithm; Data Normalization
Authors: Xiaosong Dong; Xing Zhao; Xuping Jiang
Abstract: This paper explores the choice of online information search via tools instead of website offered by Internet and dividing online information search into knowledge building stage and decision-making stage. The paper gives the online consumer search strategy choice model in order to help online retailers and website operators to assess the value of the network channels and to improve their performance of online promotion and advertising.
Keywords: Online; Information Search; Multinomial Logit; Inertia; Shock
Authors: J. Iqbal; N. A. Shah; F. A. Khanday
Abstract: Conventional CMOS technology has a lot of limitations while scaling into a nano-level. Therefore, several alternative technologies have been proposed as solutions in the open literature. Quantum Cellular Automata (QCA) technology is one such technology which can be a perfect replacement of Complementary Metal Oxide Semiconductor (CMOS) technology for digital designs. Several digital circuit designs using QCA have been reported in the open literature but to the author’s best knowledge QCA based designs of code converters have not been given. Therefore, in this paper the QCA based implementation of code converters is introduced. The proposed QCA designs enjoy the features of small area, superior performance factors in respect of noise, circuit stability and low power dissipation. The operation of QCA circuit is simulated using QCA designer bistable vector simulation.
Keywords: CMOS; Quantum Cellular Automata; Combinational Circuits; Code Converters
Authors: Chieh-Tsung Chi
Abstract: The objective of this paper focuses on developing a new technique for the speed estimation of general DC brushed motor (abbreviated as DC motor) without using shaft transducer in its feedback mechanism. As the brushes move from one commutator segment to the next, the dynamic current of DC motor produced on one of the power lines of the motor input is varied and used as the basis of sensorless speed estimation. The frequency of the ripple current closely depending upon the motor speed is measured by observing the variations of each commutation segment. Especially, the developed hardware-based speed detector is the main advantages of the proposed sensorless technique method. The performance of the motor speed characteristic employing the proposed system as its feedback has been validated through some experimental tests based on a laboratory scale prototype. The conducted tests indicate that the proposed method has a lot of outstanding performance, such as decreased maintenance, cost-effective final system, number of connections, and easier miniaturization process.
Keywords: Brushed Motor; Ripple Current; Commutator Segment; Sensorless Speed Measurement
Authors: Mohamed Hssini; Azzeddine Lazrek
Abstract: The connected allograph representing calligraphic Arabic word does not appear individually in any calligraphic resource but in association with other letters all adapted to each other. The graphic segmentation of the word by respecting aesthetical attributes indicating the grapheme of every letter is far from being an obvious task. The question consists in discovering every letter constituting the word, points of cutting which separate its grapheme from other constituents of word’s shape. The obtained segment must be a complete drawing of the represented letter. This segmentation according to contextual graphic and qualitative criteria connecting the attached allograph will have to satisfy typographic constraints varying in conformity with the possibilities offered by the wanted technology. In this paper, we develop an approach for segmenting Arabic word from which the purpose is to extract graphemes respecting the design of Arabic letters such as it is in the calligraphic literature. The procedure bases itself on the principle that the Arabic connected letters have a common part included in the cursive area, which must not be lost during the process of cutting.
Keywords: Typographic Modeling; Arabic Calligraphy; Graphic Quality; Cursive Area; Procrustes Method; Digital Font
Authors: Wenjie Niu
Abstract: In order to properly use Müller-Breslau principle to determine a structure’s influence line, Müller-Breslau principle was validated and Consummated with three examples. Results indicate that when using Müller-Breslau principle, the first step is that: for the simply supported beam having overhanging beam segment which is statically determinate, the beam segment of the structure should be treated as rigid body when using Müller-Breslau principle; for the statically indeterminate beam with two fixed ends, the beam segment of the structure should be treated as deformable bar when using Müller-Breslau principle to determine the moment influence line of the beam section at the support bearing of the fixed ends; for the statically indeterminate continuous beam with no overhanging beam segment, the beam segment of the structure should be treated as deformable bar when using Müller-Breslau principle to determine the moment influence line of the beam section at the movable hinge support bearing. The second step is the beam segment at the studied point should be replaced with a hinge. The third step is that the separated beam segment should rotate around the hinge at the studied point or can be assumed as applied with a pair of couple in the opposite direction. However, Müller-Breslau principle can only give the approximate influence line shape while rigorous influence needs to be determined with slope-deflection method. Müller-Breslau principle could be a way to validate the results given by Slope-deflection method.
Keywords: Moment Influence Line; Müller-Breslau Principle; Simply Supported Beam; Beam with Two Fixed Ends; Statically Indeterminate Continuous Beam