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Institution

Chittagong University of Engineering & Technology

EducationChittagong, Bangladesh
About: Chittagong University of Engineering & Technology is a education organization based out in Chittagong, Bangladesh. It is known for research contribution in the topics: Renewable energy & Dielectric. The organization has 1200 authors who have published 1444 publications receiving 10418 citations. The organization is also known as: Engineering College, Chittagong & Bangladesh Institute of Technology, Chittagong.


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Proceedings ArticleDOI
01 May 2019
TL;DR: This work attempted to implement an autonomous vehicle system with the aid of computer vision and neural network based learning process that moves autonomously by matching the learned frames with the current frames through neural network.
Abstract: Human performance is prone to error in case of taking optimal decision on driving issues. It is due to the lack of concentration or because of some faulty characteristics of human nature. This is one of the core reasons for road accidents in our country. To diminish away this fact, autonomous vehicle system can be a profound solution. Also in modern technological aspects, it is higher seeking concept now. Addressing these events, we attempted to implement an autonomous vehicle system with the aid of computer vision and neural network based learning process. The system learns from image frames from a camera and real-time direction command corresponding to every frame. Then it moves autonomously by matching the learned frames with the current frames through neural network. It is also capable of detecting obstacle, stop and traffic signals and act accordingly.
Posted Content
TL;DR: Yb-substituted Ni-Zn ferrites have been synthesized using sol-gel auto combustion method, which ensured the formation of single phase cubic spinel structure.
Abstract: Yb-substituted Ni-Zn ferrites have been synthesized using sol-gel auto combustion method. The structural characterization of the compositions has been performed by X-ray diffraction analysis, field emission scanning electron microscopy (FESEM), quantum design physical properties measurement system (PPMS). That ensured the formation of single phase cubic spinel structure. Crystallite and average grain size are calculated and found to decrease with increasing Yb3+ contents. Saturation magnetization and Bohr magnetic moment decrease while the coercivity increases with the increase in Yb3+ contents successfully explained by the Neels collinear two sub-lattice model and critical size effect, respectively. Critical particle size has been estimated at 6.4 nm, the transition point between single domain regime (below the critical size) and multi-domain regime (beyond the critical size). Curie temperature reduces due to the weakening of A-O-B super exchange interaction and redistribution of cations, confirmed by the M-T graph. The compositions retain ferromagnetic ordered structured below Curie temperature and above Curie temperature, it becomes paramagnetic, making them plausible candidates for high temperature magnetic device applications. The relative quality factor peak is obtained at a very high frequency, indicating the compositions could also be applicable for high frequency magnetic device applications.
Proceedings ArticleDOI
01 Dec 2012
TL;DR: The method outperforms other existing summarization tools in the sense that it optimizes summarization by first categorizing the documents on the basis of TF-IDF technology and then avoids redundant information by properly ranking the sentences using existing score.
Abstract: The work focuses on the integration of text categorization and text summarization tasks based on some existing algorithms. We primarily employ the method for bioinformatics literatures to categorize them in relevant domains of bioinformatics and then get a summarized overview of each of the documents in the domain. For text categorization we have chosen three different and core domains of bioinformatics: Protein-Protein Interaction, Disease-Drug Relevance and Pathway-Process Involvement. The method uses TF-IDF based technology for the categorization task and then after categorization it summarizes the key contents of each document using some existing features. The system plays important role in automatically reducing review spaces for the researchers as they do not need to manually select their relevant texts. It also saves time by providing ranked and significantly relevant lines of the documents. Our method outperforms other existing summarization tools in the sense that it optimizes summarization by first categorizing the documents on the basis of TF-IDF technology and then avoids redundant information by properly ranking the sentences using existing score.
Book ChapterDOI
01 Jan 2019
TL;DR: Experimental results indicate that the proposed watermarking scheme is highly robust against various attacks and outperforms state-of-the-art methods in terms of imperceptibility, robustness, and data payload.
Abstract: This chapter introduces an LWT-based audio watermarking scheme using fast Walsh-Hadamard transform (FWHT) and singular value decomposition (SVD) [30]. Conventional wavelet transform provides good results for its multi-resolution characteristics and perfect reconstruction. However, it is mainly calculated by convolution operation, resulting in high computation. In addition, the generated floating numbers increase the storage requirements. As a result, the LWT is designed to increase the efficiency and it is now used in digital watermarking [27]. In our proposed method, watermark information is preprocessed first using a Bernoulli map in order to improve the robustness and enhance the confidentiality of the watermark. Then the original audio is segmented into nonoverlapping frames. Watermark information is embedded into the largest singular value of the FWHT coefficients obtained from the low-frequency LWT coefficients of each frame. A blind watermark detection technique is developed to identify the embedded watermark under various attacks. The main features of the proposed scheme are: (i) it utilizes the LWT, FWHT, and SVD jointly; (ii) it uses Bernoulli map, containing the chaotic characteristic to enhance the confidentiality of the proposed scheme; (iii) watermark extraction process is blind; (iv) subjective and objective evaluations reveal that the proposed scheme maintains high audio quality; and (v) it achieves a good trade-off among imperceptibility, robustness, and data payload. Experimental results indicate that the proposed watermarking scheme is highly robust against various attacks such as noise addition, cropping, re-sampling, re-quantization, and MP3 compression. Moreover, it outperforms state-of-the-art methods [9–10, 14–16, 20, 23, 26, 28] in terms of imperceptibility, robustness, and data payload. The data payload of the proposed scheme is 172.39 bps, which is relatively higher than that of the state-of-the-art methods.
Journal ArticleDOI
TL;DR: In this article, the delta winglet twisted tape was used for the turbulent flow heat transfer in a tube having delta winglets twisted tape and then separately with water as working fluid.
Abstract: Heat transfer is a process or a system of thermal engineering that concerns the generation, use, conversion, transfer, internal or external molecular formation and exchange of thermal energy ( heat ) between physical systems. The research work has been experimented for the turbulent flow heat transfer in a tube having delta winglet twisted tape and then separately with water as working fluid. The test section consisted of a circular copper tube of 26.6 mm inner diameter, 900 mm length with five K-type thermocouples. Bulk temperature and pressure drops have been measured. Material of both the delta winglet twisted tape insert was stainless steel. Delta winglet twisted tape insert had a length of 795mm, width of 20mm, thickness of 2mm, pitch length of 120mm, twist ratio of 6 while wire coil insert had the same length as that of delta winglet twisted tape insert, wire diameter of 1mm, mean coil diameter of 22mm and pitch length of 30mm. Heat transfer rate, convective heat transfer coefficient, Nusselt’s number, friction factor and heat transfer efficiency have been calculated to analyze heat transfer performance of circular copper tube fitted with or without inserts in turbulent regimes (4000

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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20234
202240
2021243
2020241
2019228
2018119