Papers by Keyword: Mathematical Analysis

Abstract: The research objective is to simplify the method for estimating the density of straight-run hydrotreated winter diesel fuel (HTDFWs). The density of straight-run hydrotreated winter diesel fuel is one of the quality indicators ultimately determining the density of winter diesel fuel and therefore, the quality of winter diesel fuel in terms of density. Problems: to describe the current methodology for estimating the HTDFWs’ density, isolate the cycles, and express the cycles by formulas. Research methods – analysis, synthesis, comparison, mathematical analysis. As a result, simplified density calculation with expressing cycles by formulas has been proposed. A mathematical model has been obtained to estimate the density of straight-run hydrotreated winter diesel fuel.

Abstract: A mathematical model for diffusion of silver ions in hollow cylinders is established. In order to control the concentration of silver ions, an auxillary cylinder is introduced. The flux of of silver ions can be effectively adjusted by the radius of the auxillary cylinder.

Abstract: In this paper, different mathematics models are applied to research the reasonable pricing of the cloud computing software products on the SaaS platform and explore the sales price of the cloud computing software products with the maximum total profits. These information can be the reference for decision-makers to determine the pricing strategy. The aim of this paper is for the cloud computing company to provide the majority of users with the inexpensive and excellent softwares and services, which can make the company dominate the cloud computing market quickly, gain the huge profits in the sustainable development manner and consider the interests of the company, users and the society.Keywords: clouding computing, SaaS, pricing and charging, mathematical analysis

Abstract: Nerve cells can respond to external electromagnetic environment. It features mainly depends on the characteristics of the interference conditions. Hodgkin - Huxley (HH) model gives a quantitative description of neuronal action potentials, many electrophysiological properties of nerve cells and biological rhythms issues of interpretation, the nervous system in order to study the effect of noise, this paper considers the environment in result of the presence of the electric field coupling, and the electric field in the body of the response characteristics of HH model, given values of the simulation results and analysis of the effect of disturbance characteristics of neurons as a disturbance conditions neuronal activity.

Abstract: Using curve CAM space meshing work principle established its physical model. The mathematics model of the CAM work surface is deduced through mathematical analysis. Discussed the processing method and principle is based on the meshing forming and freedom forming machining methods, studied the curve CAM NC-processing technology using general four axis and five axis machine tools. This process has been successfully used for axis CNC milling to machining CAM surface. For continuous dividing space curve CAM CAD/CAPP / CAM system research is laying a foundation.

Abstract: In order to fully investigate dangerous sections, implement Security engineering, and reduce accidents, based on the analysis of road and traffic characteristics of rural highway, methods of identifying dangerous road and sections of rural highway are put forward. With the application of Variable Weight Comprehensive Evaluation and Fuzzy Mathematic Comprehensive Analysis method, the methods are raised in mountainous areas and common areas under the conditions of no accident data. Based on the accident data, the methods used different range come up with Quality Control-Identify Index method, Fuzzy Evaluation method, and Double Variables Filtration method. Among them, the Fuzzy Mathematic Comprehensive Analysis method is a new method of evaluation road safety degree According to the traffic and road characteristics of rural highways. These methods provide a scientific theory method for the grass-roots workers, offer the theory basis to the implementation of Safeguards engineering, and enhance the economical rationality of implementing Safeguards engineering, achieving the best economic benefit.

Abstract: The article introduces three design techniques of variable pitch & groove depth & groove width screw. We found parameterized mathematical model of the type of heterotypic screw by analyzing and computing. Then it can realize to CNC machining of variable pitch & groove depth & groove width screw on lathe.

Abstract: Constructing a new device we had to design some vapour-cooled current leads. This current leads are made of Low-Tc material connected with copper wires and some parts of High-Tc material. Its design is calculated keeping in mind the heat transfer by diffusion to a vapour-cooled stream that surrounds the conductive materials. The design and the calculations performed to achieve it, and also the background theory of the heat diffusion applied in this part of the device will be described.