scholarly journals Supporting the planning of assembly works using computer techniques

2018 ◽  
Vol 27 (3) ◽  
pp. 291-299
Author(s):  
Maciej Banach ◽  
Roman Marcinkowski
Keyword(s):  
Mathematical Models ◽  
Computer System ◽  
Functional Structure ◽  
Assembly Task ◽  
Lifting Equipment ◽  
Selection Of

The paper presents the selected aspects of the construction of a tool for planning the work of assembly machines in the construction of prefabricated cubature buildings. The solution of the problem is based on mathematical models supporting both the selection of transport means for carrying out the transport task and the selection of lifting equipment to perform the assembly task. The functional structure of the developed tool, the scope of research and a description of the planner’s cooperation with the computer system are presented.

Evolution and Selection of Quantitative Traits

2018 ◽  
Author(s):  
Bruce Walsh ◽  
Michael Lynch
Keyword(s):  
Mathematical Models ◽  
Quantitative Genetics ◽  
Complex Traits ◽  
Evolutionary Biology ◽  
Quantitative Traits ◽  
Specific Gene ◽  
Real World Data ◽  
Holistic Treatment ◽  
Genetics And Genomics ◽  
Selection Of

Quantitative traits—be they morphological or physiological characters, aspects of behavior, or genome-level features such as the amount of RNA or protein expression for a specific gene—usually show considerable variation within and among populations. Quantitative genetics, also referred to as the genetics of complex traits, is the study of such characters and is based on mathematical models of evolution in which many genes influence the trait and in which non-genetic factors may also be important. Evolution and Selection of Quantitative Traits presents a holistic treatment of the subject, showing the interplay between theory and data with extensive discussions on statistical issues relating to the estimation of the biologically relevant parameters for these models. Quantitative genetics is viewed as the bridge between complex mathematical models of trait evolution and real-world data, and the authors have clearly framed their treatment as such. This is the second volume in a planned trilogy that summarizes the modern field of quantitative genetics, informed by empirical observations from wide-ranging fields (agriculture, evolution, ecology, and human biology) as well as population genetics, statistical theory, mathematical modeling, genetics, and genomics. Whilst volume 1 (1998) dealt with the genetics of such traits, the main focus of volume 2 is on their evolution, with a special emphasis on detecting selection (ranging from the use of genomic and historical data through to ecological field data) and examining its consequences. This extensive work of reference is suitable for graduate level students as well as professional researchers (both empiricists and theoreticians) in the fields of evolutionary biology, genetics, and genomics. It will also be of particular relevance and use to plant and animal breeders, human geneticists, and statisticians.

An algebraic approach to N-soft sets with application in decision-making using TOPSIS

2021 ◽  
pp. 1-21
Author(s):  
Muhammad Shabir ◽  
Rimsha Mushtaq ◽  
Munazza Naz
Keyword(s):  
Decision Making ◽  
Mathematical Models ◽  
Real World ◽  
Algebraic Approach ◽  
Multi Criteria Decision Making ◽  
Commutative Monoids ◽  
Soft Sets ◽  
Algebraic Properties ◽  
Different Types ◽  
Selection Of

In this paper, we focus on two main objectives. Firstly, we define some binary and unary operations on N-soft sets and study their algebraic properties. In unary operations, three different types of complements are studied. We prove De Morgan’s laws concerning top complements and for bottom complements for N-soft sets where N is fixed and provide a counterexample to show that De Morgan’s laws do not hold if we take different N. Then, we study different collections of N-soft sets which become idempotent commutative monoids and consequently show, that, these monoids give rise to hemirings of N-soft sets. Some of these hemirings are turned out as lattices. Finally, we show that the collection of all N-soft sets with full parameter set E and collection of all N-soft sets with parameter subset A are Stone Algebras. The second objective is to integrate the well-known technique of TOPSIS and N-soft set-based mathematical models from the real world. We discuss a hybrid model of multi-criteria decision-making combining the TOPSIS and N-soft sets and present an algorithm with implementation on the selection of the best model of laptop.

Mathematical Modeling of Machining Parameters in Electrical Discharge Machining with Cu-B4C Composite Electrode

2012 ◽  
Vol 488-489 ◽  
pp. 871-875
Author(s):  
V. Anandakrishnan ◽  
V. Senthilkumar
Keyword(s):  
Mathematical Models ◽  
Current Pulse ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Machining Parameters ◽  
Pulse On Time ◽  
Pulse Off Time ◽  
Off Time ◽  
Selection Of

Copper based metal matrix composite reinforced with Boron Carbide is a newly developed Electrical Discharge Machining (EDM) electrode showing better performance than the conventional copper based electrode. Right selection of machining parameters such as current, pulse on time and pulse off time is one of the most important aspects in EDM. In this paper an attempt has been made to develop mathematical models for relating the Material Removal Rate (MRR), Tool Removal Rate (TRR) and Surface roughness (Ra) to machining parameters (current, pulse-on time and pulse-off time). Furthermore, a study was carried out to analyze thSubscript texte effects of machining parameters on various performance parameters such as, MRR, TRR and Ra. The results of Analysis of Variance (ANOVA) indicate that the proposed mathematical models, can adequately describe the performance within the limits of the factors being studied. Response surface modeling is used to develop surface and contour graphs to analyze the effects of EDM input parameters on outer parameters.

Mathematical Models Used for Hydrological Floodplain Modeling

2015 ◽  
pp. 240-283
Author(s):  
Carmen Maftei ◽  
Konstantinos Papatheodorou
Keyword(s):  
Mathematical Models ◽  
Data Availability ◽  
Ephemeral Streams ◽  
Ungauged Basins ◽  
Small Watershed ◽  
Modeling Methodology ◽  
Small Watersheds ◽  
Methodological Approaches ◽  
Crucial Parameter ◽  
Selection Of

There are several methodological approaches to model floodplains. The selection of the appropriate methodology is a matter of the required results and is very dependent on data availability. In fact, data availability is the crucial parameter especially when working in ungauged basins or ephemeral streams. The goal of this chapter is to evaluate methodologies used to floodplain modeling in small watersheds. An overview of the principal models used in floodplain modeling is presented here in terms of their relative advantages as compared to each other. The chapter provides the results obtained with different models applied to a small watershed situated in the Romania and concludes with a discussion about the various recommendations and solutions on flood modeling methodology.

Limit Depth of Rock Mine Shafts for Underground Shelters

2017 ◽  
Vol 755 ◽  
pp. 198-201 ◽  
Author(s):  
Alexander N. Kravcov ◽  
Pavel Svoboda ◽  
Vaclav Pospíchal ◽  
Dmitry V. Morozov ◽  
Pavel N. Ivanov
Keyword(s):  
Mathematical Models ◽  
Geological Data ◽  
Power Station ◽  
Rock Property ◽  
Mathematical Properties ◽  
Fallout Shelters ◽  
The Stability ◽  
Selection Of

Today, especially after the several technical accidents, the last one in France Flamanville power station near Cherbour in January 2017 risks of the nuclear hazards due to technical, terrorist or military accidents continually rising. In this situation is of a great importance to start with a retrofit those of underground spaces that was decommissioned in last years and to start thinking about reuse of mining shafts as a fallout shelters for protection of civil population. And the first step is to start with selection of the identify spaces with a mathematical models for selection of the rocks massifs that can be useful for porpoise of the underground shelters. The need to utilise specific geological data, which project organisations usually do not have available. The physical-mathematical properties of rocks are not sufficiently portrayed in these methodologies, which complicates execution of calculations and reduces the credibility of these calculations. The methodology for calculating the stability of rocks around a mine works proposed in the article enables resolution of the task complexly for the conditions of individual deposits, utilising the generalised values of rock property indicators.

The Optimization of Mechanized Earthwork Processes

2016 ◽  
Vol 820 ◽  
pp. 96-101 ◽  
Author(s):  
Lucia Paulovičová
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Models ◽  
Decision Maker ◽  
Multicriteria Optimization ◽  
Optimization Process ◽  
Multicriteria Method ◽  
Wise Decision ◽  
The Right ◽  
The Cost ◽  
Selection Of

Earthwork processes are the most costly and time consuming component of construction these days and they are characterized by a powerful heavy mechanization which participate on the earthwork process. Current pressure for minimize the cost and maximize the productivity highlights the need to optimize earthworks. In this paper, the optimization process in the area of earthwork processes is described. The selection of the right types of machines for earthwork and its implements has become very difficult these days because of availability of variety of machines models and therefore a multicriteria method is presented to tackle the problem. This paper describes methodology for optimizing the earthwork process according to the selected optimal criteria. The methodology is focused on the proposal phase of optimization where the decision maker has to make a decision and choose the right type of excavators. To overcome the problem of comparing the chosen machines a mathematical modeling approach leading to multicriteria optimization was adopted to make the step wise decision. The methodology gives an mathematical models by which we can solve this problem.

Examining P-gp efflux kinetics guided by the BDDCS – Rational selection of in vitro assay designs and mathematical models

2019 ◽  
Vol 132 ◽  
pp. 132-141 ◽  
Author(s):  
Julia Riede ◽  
Ken-Ichi Umehara ◽  
Patrick Schweigler ◽  
Felix Huth ◽  
Hilmar Schiller ◽  
...  
Keyword(s):  
Mathematical Models ◽  
In Vitro Assay ◽  
Rational Selection ◽  
Vitro Assay ◽  
Efflux Kinetics ◽  
Selection Of
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