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Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
Issue Info: 
  • Year: 

    2014
  • Volume: 

    4
  • Issue: 

    2
  • Pages: 

    93-101
Measures: 
  • Citations: 

    0
  • Views: 

    282
  • Downloads: 

    103
Abstract: 

This paper proposes mathematical modeling and analysis of ferrofluid lubricated newly designed slider bearing having convex pad (surface or plate) stator with two porous layers attached to the slider. The problem considers the effect of slip velocity proposed by Sparrow et. al [17] and modified by Shah et. al [9] at the film-porous interface. The squeeze velocity V=-ḣ, which appears when the upper impermeable plate approach to the lower one, is also considered here for study. The magnetic field is assumed to be oblique to the lower plate. From the Reynolds’s equation of the above model, expressions for dimensionless form of pressure and load carrying capacity are obtained. The expression for the dimensionless load carrying capacity is then solved numerically to examine its possible effect on the designed bearing system from the results it is concluded that (1) when k1>k2 dimensionless load carrying capacity increases about 6.35% for both ḣ=0, and ḣ¹0 as compared to k1<k2. (2) the dimensionless load carrying capacity increases about 113% for both ḣ=0 and ḣ¹0 when k1=k2=0.0001 as compared to k1=k2=0.01. in the above results k1 and k2 represents the permeabilities of the upper lower porous layers (matrixes) respectively.

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Issue Info: 
  • Year: 

    2014
  • Volume: 

    4
  • Issue: 

    2
  • Pages: 

    103-114
Measures: 
  • Citations: 

    0
  • Views: 

    466
  • Downloads: 

    105
Abstract: 

In this study, a new approach is introduced to solve Blasius differential equation using of Imperialist Competitive Algorithm (ICA). This algorithm is inspired by competition mechanism among Imperialists and colonies and has demonstrated excellent capabilities such as simplicity, accuracy, faster convergence and better global optimum achievement in contrast to other evolutionary algorithms. The obtained results have been compared with the exact solution of Blasius equation and another result obtained in previous works and show higher accuracy and less computational requirements. In addition, the method presented with details can beeasily extended to solve a wide range of nonlinear problems.

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Issue Info: 
  • Year: 

    2014
  • Volume: 

    4
  • Issue: 

    2
  • Pages: 

    115-123
Measures: 
  • Citations: 

    0
  • Views: 

    305
  • Downloads: 

    85
Abstract: 

Small Area estimation is a technique used to estimate parameters of subpopulations with small sample sizes. Small area estimation is needed in obtaining information on a small area, such as sub-district or village. Generally, in some cases, small area estimation uses parametric modeling. But in fact, a lot of models have no linear relationship between the small area average and the covariate. This problem requires a non-parametric approach to solve, such as Kernel approach and Local Polynomial Regression (LPR). The purpose of this study is comparing the results of small area estimation using Kernel approach and LPR. Data used in this study are generated by simulation results using R language . Simulation data obtained by generating function m (x) are linear and quadratic pattern. The criteria used to compare the results of the simulation are Absolute Relative Bias (ARB), Mean Square Error (MSE), Generalized Cross Validation (GCV), and risk factors. The simulation results showed: 1) Kernel gives smaller relative bias than LPR does on both linear and quadratic data pattern. The relative bias obtained by Kernel tends to be more stable and consistent than the relative bias resulted by LPR, (2) the Kernel MSE is smaller than the LPR MSE either on linear or quadratic pattern in any combination treatment, (3) the value of GCV and the risk factors in Kernel are smaller than these in LPR in any combination of the simulated data patterns, (4) on non parametric data, for both linear data pattern and quadratic data pattern, Kernel methods provide better estimation compared to LPR.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2014
  • Volume: 

    4
  • Issue: 

    2
  • Pages: 

    125-134
Measures: 
  • Citations: 

    1
  • Views: 

    400
  • Downloads: 

    108
Abstract: 

Please click on PDF to view the abstract

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 108 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesCitation 1 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesRefrence 5
Author(s): 

SANJAY JAIN | SHAKHER CHANDER

Issue Info: 
  • Year: 

    2014
  • Volume: 

    4
  • Issue: 

    2
  • Pages: 

    135-150
Measures: 
  • Citations: 

    0
  • Views: 

    282
  • Downloads: 

    97
Abstract: 

Play is often episodic and mission-centric, with a series of challenges culminating in a final puzzle or enemy that must be overcome. Multiple missions played with the same characters may be related to each other in a plot arc of escalating challenges. The exact tone, structure, pace and end (if any) vary from game to game depending on the needs and preferences of the players, as in [9]. "THE CHANCE ELEMENT in thousands of indoor games is introduced by a variety of simple random-number generators. The most popular of such devices, ever since the time of ancient Egypt, have been cubical Dice. Cubical, Because of their symmetry, any of the five regular solids can be and have been used as gaming dice, but the cube has certain obvious advantages over the other four solids. It is the easiest to make, its six sides accommodate a set of numbers neither too large nor too small, and it rolls easily enough but not too easily", as in [1], [2]. In our proposed Dice Finder game problem, user can see the different dice number's on screen from 1 to 6. Using the property of Dice that “Opposite sides of a dice add up to seven”, user has to find that correct number of dice out all of that, for which one condition is true.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesDownload 97 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesCitation 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic ResourcesRefrence 1
Issue Info: 
  • Year: 

    2014
  • Volume: 

    4
  • Issue: 

    2
  • Pages: 

    151-165
Measures: 
  • Citations: 

    1
  • Views: 

    383
  • Downloads: 

    81
Abstract: 

A single server finite population queueing model with compulsory server vacation and with fixed batch service has been considered. For this model the system steady state probabilities are obtained. Some performance measures are calculated and numerical examples are also given.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2014
  • Volume: 

    4
  • Issue: 

    2
  • Pages: 

    167-176
Measures: 
  • Citations: 

    0
  • Views: 

    257
  • Downloads: 

    76
Abstract: 

Priority queues have a great importance in the study of computer communication networks in which different types of traffic require different quality of service standards. The discrete-time non-preemptive priority queuing model with priority jumps is proposed in this paper. On the basis of probability generating functions mean system contents and mean queuing delay characteristics are obtained. The effect of jumping mechanism is analysed which clearly shows that the queuing system provides better results when the fraction of class-1 arrivals in the overall traffic mix is small.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2014
  • Volume: 

    4
  • Issue: 

    2
  • Pages: 

    177-187
Measures: 
  • Citations: 

    0
  • Views: 

    434
  • Downloads: 

    116
Abstract: 

In this paper, we consider the step fixed-charge transportation problem (FCTP) in which a step fixed cost, sometimes called a setup cost, is incurred if another related variable assumes a nonzero value. In order to solve the problem, two metaheuristic, a spanning tree-based genetic algorithm (GA) and a spanning tree-based memetic algorithm (MA), are developed for this NP-hard problem. For comparing GA and MA, twenty eight problems with different specifics have been generated at random and then the quality of the proposed algorithms was evaluated using the relative percentage deviation (RPD) method. Finally, based on RPD method, we investigate the impact of increasing the problem size on the performance of our proposed algorithms.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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