Assam Don Bosco University Journals
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FINDING CORRELATION OF FUZZY DATA
Get PDFWhile dealing with the non-fuzzy data, finding statistical parameters like mean, variance, standard deviation and correlation coefficient between variables are very common. However, evaluating the value of such statistical parameters are not so straightforward in case of fuzzy data. In this article, we propose a new method to find the correlation coefficient of two fuzzy sets in terms of their membership values. For this purpose, we define covariance using the membership values of the fuzzy sets. We derive the formula for finding correlation coefficient for the fuzzy sets over both continuous and discrete universal sets. We have shown in this paper that the value of coefficient lies in the interval [0, 1]. We then demonstrate our work with the help of numerical examples
Optimum Replacement of Coarse Aggregate by Steel Slag and Fine Aggregate by Waste Glass Powder
Get PDFGlass is one of the world's oldest and most commonly used materials. Glass has a fairly short shelf life in its current condition. Reusing this waste in construction materials is one alternative for safe environmental and economic disposal. The waste glass will be used to substitute fine aggregate in the following proportions: 0%, 10%, 20%, 25%, 30%, 40%, and 50%. This study will go over properties such as compressive strength. Another attempt was made to replace coarse aggregate with steel slag because there is a growing interest in using waste materials as alternative aggregate materials and significant research is being conducted on the use of many different materials as aggregate substitutes such as coal ash, blast furnace slag, and steel slag aggregate. By altering the quantity of steel slag, different concrete mixtures were created Steel slag is to be substituted for coarse aggregate in the following proportions: 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, and 90%. Compressive strength of concrete to be reviewed, as well as another attempt at combined replacement by replacing both fine aggregate and coarse aggregate with waste glass powder and steel slag, while maintaining the optimum replacement of glass powder constant and varying the percentage replacement of steel slag with coarse aggregate in proportions of 0%,10%,20% up to 80%, and thus finding the combined optimum replacement of coarse and fine aggregates with steel slag and waste glass powder in terms of compressive strength of concrete
Importance of Cement Based Unfired Building Blocks in Construction
Get PDFThe need of sustainable and low cost building material is one of the prime concerns for the researchers. This is due to ever increasing demand of conventional building materials that are dependent to natural resources. Conventional clay bricks are one of the important building materials for construction industries. Superior engineering properties of clay bricks makes it most preferable building material for making non-structural elements. Production of conventional bricks is dependent to natural resources like clay, river sand and dirt and exploration of such resources is always harmful for environment. The manufacturing process of conventional bricks is fuel consuming and also emits greenhouse gases in bulk. This research focuses towards promoting cement based unfired building blocks along with the use of conventional clay bricks. Review of researches shows that the use of non-biodegradable abundantly available wastes such as fly ash, brick waste or debris, quarry dust, gypsum etc., in the form of fillers for cement based building blocks, provides the best solution to minimize the load bear by conventional clay bricks
Various Modulation Options for OFDM in 5G System: A Comparative Approach
Get PDFThe loss of information and signal quality degradation is the major issue in wireless communication due to multipath fading. The ‘multi-input multi-output (MIMO)’ antenna system can be used to minimize the signal fading which alternatively reduces the error rates but at the cost of hardware complexity, power consumption. The most critical issue in wireless communication is the availability of bandwidth, and signal quality. These issues can be resolved satisfactorily with the employment of ‘orthogonal frequency division multiplexing (OFDM)’ system. The significant functional element of the OFDM system is the kind of modulation technique employed. Various modulation techniques are employed in the OFDM system to enhance the data rates as well as to reduce the error rates. This article focuses on the error rate behavior of different PSK and QAM modulation techniques used in the OFDM system
PUBLIC REVOLUTION: A MATHEMATICAL MODELLING
Get PDFPeople may become agitated against the incumbents because of many reasons. The offended public meet the common men and motivate them to become dissidents. This way the number of dissidents’ hikes and they raise their points against the stakeholders. This is called public revolution. This can be mathematically modelled. In this article, Kermack-Mckendrik’s famous SI model is used to express the situation. The common men are considered as susceptible and the dissidents are considered as infectives. The more interaction between common men and dissidents, the more chance of public revolution. The whole situation is organized with a system of ordinary differential equations. The basic reproduction number is called the basic dissidence number. If the basic dissidence number is higher than 1, then the chance of public revolution sustains
Evaluation of Ductility factor for the Elevated Water tank
Get PDFIn the current procedures of design and analysis for seismic forces, base shear is calculated by the elastic strength demand divided by the strength reduction factor. This calculated factor is known as the Response Reduction factor ‘R’, which means for ductility, redundancy, Over-strength, and damping of a structural configuration. In the present study, the Response reduction factor accounting for ductility is known as the Ductility factor (Rμ). The Ductility factor is defined as the ratio of elastic strength capacity imposed on the single degree of freedom system to inelastic strength capacity for a given ductility ratio. The Ductility factor allows a system to behave in-elastically within the target ductility ratio during the design level earthquake ground. The objective of this study is to determine the ductility factor considering different parameters. It generally requires study to determine the Ductility factor. In the present study, the Ductility factor is determined for different parameters. For this purpose, statistical studies are carried out using different parameters such as the height of the tank, capacity of the tank, tank full and empty condition, and different earthquake zone. The Ductility factor is assumed to be a function of each of the above parameters. The effects of each parameter on the Ductility factor are also discussed at the end
Design and Analysis of Metamaterial Electromagnetic Wave Absorbers at THz Frequency
Get PDFThe subject of THz research and technology has advanced dramatically over the previous two decades. In the THz regime, a metamaterial-based absorber is in high demand. Metamaterials (MMs) can be employed as an effective medium by changing the shape to influence the electromagnetic characteristics. All incident radiations at a specific operational frequency are absorbed by a unity absorber, while transmissivity, reflectivity, scattering, and all other light propagation pathways are inhibited. The main focus of this study is on metamaterial-based perfect absorbers (MMPA) in the THz regime. This paper presents an MMPA with two metallic layers and a dielectric. The suggested MMPA is investigated utilising three different materials: gold, silver, and copper, with a comparison between them shown her
FEIGENBAUM UNIVERSALITY, TIME SERIES ANALYSIS AND LYAPUNOV EXPONENTS IN NONLINEAR TWO DIMENSIONAL CHAOTIC MODELS
Get PDFIn this paper, we consider a two dimensional nonlinear chaotic model as where , , are adjustable parameters. M.J. Feigenbaum showed around 1980 how a route can be established from a regular system to a chaotic system in many nonlinear systems. Here we establish the universal route with the above mentioned model by determining the sequence of bifurcation points with the help of numerical methods and computer software. Time series analysis is carried out with different graphs in order to reveal how stability and instability of the periodic points appear in different ranges of the parameters. We evaluate Lyapunov exponents along with their graphs in order to confirm the regular and chaotic regions of the system. Different techniques are applied how to control the chaos i.e., how to go from the chaotic region to the regular one. Many other relevant results are discussed, and a few open problems are posed