نتایج جستجو برای: and mathematical calculations
تعداد نتایج: 16856589 فیلتر نتایج به سال:
This paper explains a model for analyzing and measuring the propagation of order amplifications (i.e. bullwhip effect) for a single-product supply network topology considering exogenous uncertainty and linear and time-invariant inventory management policies for network entities. The stream of orders placed by each entity of the network is characterized assuming customer demand is ergodic. In fa...
Background: The term learning disability applied to explain the problems of a person with average intelligence in basic academic skills and can affect a person's ability to understand and use spoken or written language, mathematical calculations, coordinate movements, or direct attention. Learning disability can be divided into three difficulties in reading, writing, and arithmetic. The prevale...
The sectoral structure of most agricultural enterprises is unbalanced and uncoordinated, which underlies the need in deepened research of its improvement. This paper is dedicated to the formation and evaluation of the sectoral structure with the use of mathematical methods of data processing. Mathematical economic modeling based on optimization and simulation models has been applied for the for...
Kick occurrence is a possible event during a drilling process. It is required to be handled immediately using a well control method to avoid blowout, financial losses and damages to the drilling crew. Several methods including driller, wait and weight, and concurrent are applicable in the drilling industry to control a well during a kick incident. In this study, typical well control methods wer...
Learning disorder is a group of heterogeneous disorders that is manifested in major forms of learning and using abilities such as listening, writing and reasoning or mathematical calculations. Most learning disorder children have social and emotional problems too. Special attention should be given to the treatment of these children. One of the effective methods for the treatment of these child...
Introduction to the Slide Modeling Method for the Efficient Solution of Heat Conduction Calculations
Determination of the maximum temperature and its location is the matter of the greatest importance in many technological and scientific engineering applications. In terms of numerical calculations of the heat conduction equation by using uniform mesh increments in space, large computational cost is sometimes countered. However, adaptive grid refinement method could be computationally efficient ...
During the complete oxidation of fatty acids, the electrons removed from fatty acids in different forms (FADH2 and NADH2) pass through the respiratory chain, driving the ATP synthesis. Generally, the ATP yield due to the complete oxidation of fatty acids is calculated by sum total the ATPs obtained due to the oxidation of FADH2 and NADH2 due to lack of any particular method. This calculation is...
Shortest path problem is among the most interesting problems in the field of graph and network theory. There are many efficient matrix based algorithms for detecting of shortest path and distance between all pairs of this problem in literature. In this paper, a new exact algorithm, named Cascade Rectangle Algorithm, is presented by using main structure of previous exact algorithms and developin...
a one–dimensional, transient and thermal degradation model for predicting responses of composite materials when are exposed to the fire is presented. the presented model simulates ablation of composites with different layers of materials and considers material properties as functions of temperature. the reactions are modeled by using arrhenius-type parameters and density-temperature diagrams wh...
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