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Search Results: 1 - 10 of 131664 matches for " Anh V. Dinh "
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Automated Diabetic Retinopathy Detection Using Bag of Words Approach  [PDF]
Monzurul Islam, Anh V. Dinh, Khan A. Wahid
Journal of Biomedical Science and Engineering (JBiSE) , 2017, DOI: 10.4236/jbise.2017.105B010
Abstract:
Imaging and computer vision systems offer the ability to study quantitatively on human physiology. On contrary, manual interpretation requires tremendous amount of work, expertise and excessive processing time. This work presents an algorithm that integrates image processing and machine learning to diagnose diabetic retinopathy from retinal fundus images. This automated method classifies diabetic retinopathy (or absence thereof) based on a dataset collected from some publicly available database such as DRIDB0, DRIDB1, MESSIDOR, STARE and HRF. Our approach utilizes bag of words model with Speeded Up Robust Features and demonstrate classification over 180 fundus images containing lesions (hard exudates, soft exudates, microaneurysms, and haemorrhages) and non-lesions with an accuracy of 94.4%, precision of 94%, recall and f1-score of 94% and AUC of 95%. Thus, the proposed approach presents a path toward precise and automated diabetic retinopathy diagnosis on a massive scale.
Design of a Seismocardiography Using Tri-Axial Accelerometer Embedded with Electrocardiogram
Anh Dinh
Lecture Notes in Engineering and Computer Science , 2011,
Abstract:
A -Enhanced 3.6 ? GHz, Tunable, Sixth-Order Bandpass Filter Using 0.18? m CMOS
Anh Dinh,Jiandong Ge
VLSI Design , 2007, DOI: 10.1155/2007/84650
Abstract: An experimental filter was designed to operate at 3.6 GHz using mainstream 0.18 μm CMOS. In the design, the Q-enhancement technique was used to overcome the low-Q characteristics of the CMOS on-chip inductors. A sixth-order bandpass filter with a wide passband and a high image rejection was built by cascading three stages of second-order Q-enhanced filters. A combination of three biquads with offset in center frequency provides wider tuning frequency and bandwidth. This high-performance filter provides a 340 MHz tunable center frequency around 3.6 GHz, an image rejection of 50 dB and a tunable Q from 25 to 50 for a bandwidth adjustment from 95 MHz to 35   MHz. The filter achieves an 18 dB voltage gain while consuming 130 mW of power at 1.8 V DC supply. The chip occupies an area of 900×900μm2 including all the required bonding pads. The design provides a simple architecture to simplify tuning scheme for both frequency and bandwidth for practical use. The tunable ability of the design could be exploited in further study to be used as a channel-select filter in the gigahertz range.
Fixed Point Design and Implementation of an OFDM Transmitter for ETSI Satellite Digital Radio on FPGA Platform
Suranjana Julius,Anh Dinh
Lecture Notes in Engineering and Computer Science , 2011,
Abstract:
Design of a 11-Band 3-10GHz Frequency Synthesizer for Multi-Band OFDM UWB Transceiver in 90nm CMOS Technology
Xubo Wang,Anh Dinh
IAENG International Journal of Computer Science , 2010,
Abstract:
Directly immobilized DNA sensor for label-free detection of herpes virus  [PDF]
Phuong Dinh Tam, Mai Anh Tuan, Nguyen Duc Chien
Journal of Biomedical Science and Engineering (JBiSE) , 2009, DOI: 10.4236/jbise.2009.26054
Abstract: This paper reports the direct immobilization of deoxyribonucleic acid (DNA) sequences of Herpes simplex virus (5’–AT CAC CGA CCC GGA GAG GGA C–3’) on the surface of DNA sensor by using the cyclic voltammetric method with the presence of pyrrole. The potential was scanned from –0.7 volt to + 0.6 volt, the scanning rate was at 100mV/s. This kind of DNA sensor was developed to detect Herpes virus DNA in real samples. The FTIR was applied to verify specific binding of DNA sequence and conducting polymer, the morphology of conducting polymer doped with DNA strands was investigated by using a field emission scanning electron microscope (FE-SEM). The results showed that output signal given by coimmobilized DNA/PPy membrane sensor was better than that given by APTS immobilized membrane sensors. The sensor can detect as low as 2 nM of DNA target in real samples.
Hybrid Extragradient-Type Methods for Finding a Common Solution of an Equilibrium Problem and a Family of Strict Pseudo-Contraction Mappings  [PDF]
Pham Ngoc Anh, Tran Dinh Quoc, Dang Xuan Son
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.330192
Abstract: This paper proposes a new hybrid variant of extragradient methods for finding a common solution of an equilibrium problem and a family of strict pseudo-contraction mappings. We present an algorithmic scheme that combine the idea of an extragradient method and a successive iteration method as a hybrid variant. Then, this algorithm is modified by projecting on a suitable convex set to get a better convergence property. The convergence of two these algorithms are investigated under certain assumptions.
Attractors for Nonautonomous Parabolic Equations without Uniqueness
Cung The Anh,Nguyen Dinh Binh
International Journal of Differential Equations , 2010, DOI: 10.1155/2010/103510
Abstract: Using the theory of uniform global attractors of multivalued semiprocesses, we prove the existence of a uniform global attractor for a nonautonomous semilinear degenerate parabolic equation in which the conditions imposed on the nonlinearity provide the global existence of a weak solution, but not uniqueness. The Kneser property of solutions is also studied, and as a result we obtain the connectedness of the uniform global attractor.
Existence and continuity of global attractors for a degenerate semilinear parabolic equation
Cung The Anh,Tran Dinh Ke
Electronic Journal of Differential Equations , 2009,
Abstract: In this article, we study the existence and the upper semicontinuity with respect to the nonlinearity and the shape of the domain of global attractors for a semilinear degenerate parabolic equation involving the Grushin operator.
Some problems of extracting level density and radiative strength functions from the gamma-spectra in nuclear reactions
V. A. Khitrov,A. M. Sukhovoj,Pham Dinh Khang,Vo Thi Anh,Vuong Huu Tan,Nguyen Canh Hai,Nguyen Xuan Hai
Physics , 2003,
Abstract: The most important systematical errors in determination of level density and radiative strength functions for deformed nuclei have been estimated from the gamma-ray spectra in nuclear reactions like the stripping or pickup reactions.
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