Automatic video parsing system

This report describes the design and development of a content-based video parsing system for MPEG video sequences.RG 36/9

A computer add-on card as a gas sensing analyser

49-53<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:arial;mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="">A PC add-on card was designed for fast multi-channel data acquisition and analysis of the surface resistances of a gas sensor array to detect the components of a gas mixture. Commercial data acquisition systems such as Lab View from National Instruments" HP VEE for windows and Keith-ley data acquisition system are costly and require long development time to configure for a specified application. They usually require external power sources and other instruments, in addition to external signal conditioning circuitry. Moreover, they have limited sampling rate and precision. In the present system, apart from data acquisition, data processing and analysis were carried out using FFT techniques, multivariate regression and artificial intelligent techniques such as neural network and fuzzy logic to detect the components H2 and CO in a gas mixture quantitatively. The initial resistances, final steady state resistances, dynamic responses, relative humidity, and temperature are used to predict quantitatively the gas concentration of a gas mixture.</span

Characterization and development of gas sensors for instrumentation

RG 52/9

Intelligent image database system with high level image recognition and flexible data retrieval capabilities

content-basedRP 58/9

A Practical and Efficient Approach to the Constrained via Minimization Problem

This paper presents an efficient and practical approach to the Constrained Via Minimization (CVM) problem, which assigns wire segments to the layers, using the minimum number of vias, given a feasible partial routing. The feasible partial routing is first represented by a directed bipartite graph to reflect the mutual constraints. An energy function is then proposed to turn the problem into a cost optimization problem. An efficient heuristic algorithm, combining hill-climbing and simulated annealing, is developed for the cost optimization. The algorithm has the capability to escape from the local minimums and eventually reaches a near-optimal or optimal solution. The proposed method is practical as it can handle many practical constraints such as a multi-way wire split from a single via, and pre-allocation of power nets and terminals. Experimental results show that our proposed method is efficient in handling complex grid-based routing

Ultra-thin carbon nanofiber networks derived from bacterial cellulose for capacitive deionization

10.1039/c5ta00435gJournal of Materials Chemistry A3168693-870

An investigation into the parameters affecting total harmonic distortion in low-voltage low-power class-D amplifiers

We investigate the influence of two important practical design parameters on total harmonic distortion (THD) for the design of low-voltage (0.9–1.4 V) low-power analog Class-D amplifiers: the linearity of the carrier waveform and the impedance of the output stage. We show that the carrier nonlinearity results in THD and propose a novel mathematical analysis method to model the nonlinearity. We recommend a range of the parameter that describes the carrier nonlinearity and that results in a good compromise to the dynamic range of the pulsewidth modulator of the Class-D amplifier. We show that the impedance of the output stage has little effect on THD. We verify our analyses by means of MATLAB and HSPICE computer simulations, and on the basis of practical measurements.Published versio

Intelligent control of a nitrogen laser

The aim of this project was to build and refine a nitrogen laser, and subsequently apply computational intelligence to control and stabilize the output characteristics of the nitrogen laser beam.RG 70/9

Telecommunication and information techniques and system III

In this report, we discuss the problem of protecting digital information such as software, document, music and video from illegal redistribution by an authorized user, and present some efficient eneryption schemes and group signature techniques.RGM 16/9