430 Result(s) for ' Mathematica'
-
American Journal of Mathematical Analysis
-
Journal of Mathematical Sciences and Applications
|
|
|
A Mathematica l Model for the Study and Forecast of the Concentration of Harmful Substances in the Atmosphere
|
|
Normakhmad Ravshanov, Mukhamadamin Shertaev, Nodira Toshtemirova
|
|
American Journal of Modeling and Optimization. 2015 3 (2). doi: 10.12691/ajmo-3-2-1
|
|
Keywords: mathematical model, numerical algorithm, harmful substances, wind speed, humidity, weather and climate factor, soil erosion, resistance force, destruction force, concentration
|
Context: ...f overview of the problem of studying and forecasting the diffusion of harmful substances in the atmosphere. Authors developed a Mathematica l model that takes into several parameters of the process and also weather and climate factors. Numerical experiments were conduct...
|
|
|
Context: ...f vagueness and/or uncertainty. In this paper, we apply a new trapezoidal fuzzy assessment model (TRFAM) for measuring students’ Mathematica l modeling (MM) skills. TRFAM is actually a variation of the commonly used in fuzzy logic centre of gravity (COG) defuzzification ...
|
|
|
Context: This study aims to investigate (1) the improvement of students' Mathematica l problem solving ability (MPSA) through Autograph-assisted realistic mathematics education approach (ARME), (2) The existence of ...
|
|
|
Context: This study aims to analyze: (1) The level of students' Mathematica l problem-solving ability, (2) Mistakes made by students in solving mathematical problem-solving problems. This type of research i...
|
|
|
Context: This study aims to analyze: (1) the level of metacognitive skills in Mathematica l problem solving in terms of student learning styles; (2) metacognition difficulties experienced by students in solving mathemati...
|
|
|
Context: This research aims to: 1) analyze the types of errors made in solving Mathematica l problems (MP) based on Newman's procedures by students taught through problem-based learning (PBL); 2) to find the cause of erro...
|
|
|
Context: The purpose of this research is to analyze: 1) the students metacognitive ability in Mathematica l problems solving, 2) difficulties experienced by students’ metacognitive in mathematical problem solving, 3) process of students...
|
|
|
Context: This study aims to: (1) determine the level of students Mathematica l creative thinking abilities; (2) analyze the difficulties of students mathematical creative thinking process through the Problem...
|
|
|
Context: Hydrogen is a potential replacement for fossil fuels in the transportation sector because it is clean, renewable and has the possibility to reduce emission of criteria pollutants (NOx) and the effect on global warming via carbon dioxide which is negligible. The present research study is devoted to analyze the process of combustion of hydrogen in the four-cycle one-cylinder spark ignited engine and to concern with developing a numerical model that consider the features of process of combustion, to estimate the influence of the constructive and the control parameters of the engine on process of combustion. It is found that the curve of speed of combustion at hydrogen blending is close to the triangular form. It was found that varying the compression ratio and, to a lesser extent, the ignition timing influences the duration and the dynamics of the combustion process, more than at varying the air–fuel ratio.
|
|
|
Context: Using the random function in Mathematica (a mathematical software), random numbers between 0 and 1 were generated which in turn used to create random pictures. The random...
|