YMCA University of Science and Technology

About: YMCA University of Science and Technology is a education organization based out in Faridabad, India. It is known for research contribution in the topics: Web page & Web crawler. The organization has 299 authors who have published 568 publications receiving 4547 citations.

Optimisation of cutting force using metaheuristics

Abstract: The significance of this research is to optimise the cutting force in turning by optimising the cutting parameters like cutting speed, feed, and depth of cut. Cutting force is one of the essential characteristic variables to be watch and controlled in the cutting processes to optimise tool life and surface roughness of the workpiece. The principal presumption was that the cutting forces increase due to the wearing of the tool. Cutting force is optimised by the metaheuristic, i.e., genetic algorithm (GA) and teaching-learning based optimisation (TLBO) algorithm. The analysis of the result shows that the optimal combination for low resultant cutting force is low cutting speed, low feed and low depth of cut. This study finds that by adjusting machining parameters, tool life can be enhanced because cutting forces increase due to the wearing of the tool. So, cutting forces have been used to maximise the tool life because cutting force increased rapidly as tool life finished. As a result, the production cost can be minimised and be extending the tool usage and subsequently, the machining time is reduced, and the tool usage can be extended.

Structural modeling of a typical gas turbine system

Abstract: This paper presents an approach for the structural modeling and analysis of a typical gas turbine system. This approach has been applied to the systems and subsystems, which are integral parts of a typical gas turbine system. Since a gas turbine system performance is measured in terms of fluid flow energy transformations across its various assemblies and subassemblies, the performance of such subsystems affects the overall performance of the gas turbine system. An attempt has been made to correlate the associativity of such subsystems contributing to overall gas turbine system functional evaluation using graph theoretic approach. The characteristic equations at the system level as well as subsystem level have been developed on the basis of associativity of various factors affecting their performance. A permanent function has been proposed for the functional model of a gas turbine system, which further leads to selection, identification and optimal evaluation of gas turbine systems.

A novel approach for phase locked loop modelling using MATLAB

Abstract: This research aims at the special needs of phase locked loops (PLLs) for a typical application with FACTS devices. An adaptive PLL system comprising of three independent control units i.e. frequency, phase angle and voltage magnitude has been proposed. The output angle is used to generate the synchronised pulses for thyristors in FACTS devices which control the operation of these devices. The proposed controller reduces the phase and frequency error efficiently. The stability of the system is also increased even transient disturbances occurred in the system. In this paper, the design of proposed adaptive PLL is suggested using MATLAB, Simulink as a simulation tool. The total harmonics distortion are calculated in case a fault occurs in the system and compared with that of the system without any fault. The simulation results are simulated using MATLAB block-set and noticeable improvements are discussed.

Impact of urban sprawl in waste disposal management: need actions required managing in almora town

Abstract: Urban sprawl, also called suburban sprawl, the rapid expansion of the geographic extent of cities and towns and urban sprawl is caused in part by the need to accommodate a rising urban population. Almora is one newly sprawl town in the hilly region of Uttarakhand and due to newly sprawl town Almora facing many kind of waste disposal problems. According to censes year 2011 Almora town has 11 wards (total population 33755) and 14 villages (total population 14547) are situated near town sprawl border. There is 49 most waste disposal site in all 11 wards at Almora town but 25 waste disposal location are found without dustbin and wastage are over spread to the ground. The town wastage dumping zone is not a right place, which is outside the town but this is very harmful for environment and as well as human being who want to enter the town. A detailed field investigation was conducted in the study area to find out the cause of town sprawl, waste disposal, origin of wastage sources and need actions required to manage in Almora town of Kumaun Himalaya. Based on this study a detailed mitigation strategy has been worked out which may be useful for the government for management impact of urban sprawl in waste disposal in future. KEY WORD: Urban Sprawl, Waste Disposal, Wastage Sources, Actions Required, Almora

Beamforming and Combining in Multi-User Large MIMO Systems

Abstract: We address the problem of beamforming and combining in a large multiple-input multiple-output systems in Rayleigh fading environment. A very large number of antennas, i.e., N s are employed at the transmitter. Some fixed number of antennas, i.e., N t are assigned to each user. A specific transmit weight/beamforming vector is used for transmitting the symbols of a particular user; and the user utilizes a specific combining vector for detecting the transmitted signal. Two different schemes are proposed to calculate beamforming and combining vectors. In first scheme, transmit weight vectors are chosen by using the principle of maximum ratio transmission; and maximum eigen value criterion is used for calculating the combining vector. In second scheme, the concept of null space is used for the calculation of combining vector. It is shown by simulations that proposed schemes works well and second scheme performs better than first scheme.