scholarly journals A Simple Mathematical Model for Refrigerating Compressor Optimization

Pomorstvo ◽  
2018 ◽  
Vol 32 (1) ◽  
pp. 146-151
Author(s):  
Darko Glujić ◽  
Predrag Kralj ◽  
Dragan Martinović
Keyword(s):  
Mathematical Model ◽  
Payback Period ◽  
Optimization Criterion ◽  
Simple Mathematical Model ◽  
Equipment Production ◽  
International Conventions ◽  
Technical Rules ◽  
Selection Of ◽  
Classification Society ◽  
The Way

A marine equipment optimization depends on the determined criteria. Optimal equipment production and its usage instead of the standard one, could increase the investment costs resulting in the increase of the payback period and the important characteristic of the marine equipment should be in accordance with the technical rules of the classification society and the international conventions. In some cases the optimization of marine equipment is possible and desirable. The paper deals with the refrigerating systems in general and especially with the refrigerating compressor, the most expensive part of the system. The optimization criterion is the minimization of the total costs of the refrigerating system. The model should show the way to decrease refrigerating system costs and give an information tool for a quicker selection of refrigerating system elements.

A simple mathematical model applied to selection of the sodium profile during profiled haemodialysis.

1998 ◽  
Vol 13 (2) ◽  
pp. 404-416 ◽  
Author(s):  
L. ColA  ◽  
M. Ursino ◽  
V. Dalmastri ◽  
F. Volpe ◽  
G. La Manna ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Simple Mathematical Model ◽  
Selection Of

scholarly journals First-order transition in a model of prestige bias

2020 ◽  
Vol 8 (2) ◽  
Author(s):  
Brian Skinner
Keyword(s):  
Mathematical Model ◽  
Bayesian Inference ◽  
Order Transition ◽  
Simple Mathematical Model ◽  
First Order ◽  
Prior Expectation ◽  
First Order Transition ◽  
The Prestige ◽  
The Way

One of the major benefits of belonging to a prestigious group is that it affects the way you are viewed by others. Here I use a simple mathematical model to explore the implications of this ``prestige bias'' when candidates undergo repeated rounds of evaluation. In the model, candidates who are evaluated most highly are admitted to a ``prestige class'', and their membership biases future rounds of evaluation in their favor. I use the language of Bayesian inference to describe this bias, and show that it can lead to a runaway effect in which the weight given to the prior expectation associated with a candidate's class becomes stronger with each round. Most dramatically, the strength of the prestige bias after many rounds undergoes a first-order transition as a function of the precision of the examination on which the evaluation is based.

scholarly journals Incentives for Crypto-Collateralized Digital Assets

Proceedings ◽  
2019 ◽  
Vol 28 (1) ◽  
pp. 2
Author(s):  
Philip N. Brown
Keyword(s):  
Mathematical Model ◽  
Price Volatility ◽  
High Price ◽  
Design Parameters ◽  
Simple Mathematical Model ◽  
Incentive Mechanisms ◽  
Digital Currency ◽  
Incentive Effects ◽  
Digital Assets ◽  
Selection Of

Digital currencies such as Bitcoin frequently suffer from high price volatility, limiting their utility as a means of purchasing power. Hence, a popular topic among cryptocurrency researchers is a digital currency design which inherits the decentralization of Bitcoin while somehow mitigating its violent price swings. One such system which attempts to establish a price-stable cryptocurrency is the BitShares market-pegged-asset protocol. In this paper, we present a simple mathematical model of the BitShares protocol, and analyze it theoretically and numerically for incentive effects. In particular, we investigate how the selection of two key design parameters function as incentive mechanisms to encourage token holders to commit their core BitShares tokens as collateral for the creation of new price-stabilized tokens. We show a pair of analytical results characterizing some simple facts regarding the interplay between these design parameters. Furthermore, we demonstrate numerically that in some settings, setting these design parameters is a complex, sensitive, and unintuitive task, prompting further work to more fully understand this design process.

scholarly journals A Mathematical Model of the Formation of Lanes in Crowds of Pedestrians Moving in Opposite Directions

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Guillermo H. Goldsztein
Keyword(s):  
Mathematical Model ◽  
Simple Mathematical Model ◽  
Crowded Environments ◽  
Simple Behavior ◽  
The Way

In crowded environments, pedestrians moving in opposite directions segregate into lanes of individuals moving in the same direction. It is believed that this formation of lanes that facilitates the flow results from the individuals acting on their behalf, responding to local stimuli, without the intention of benefiting the crowd as a whole. We give evidence that this is true by developing and analyzing a simple mathematical model. Our results suggest that the simple behavior of moving out of the way to avoid imminent collisions leads to the formation of lanes of individuals moving in the same direction.

scholarly journals BASIC MATHEMATICAL FORM OF MICHELL STRUCTURE

2021 ◽  
pp. 1-4
Author(s):  
Sanaullah Khushak ◽  
Ani Luo ◽  
Muhammad Basit Chandio ◽  
Asif Raza
Keyword(s):  
Mathematical Model ◽  
Coordinate System ◽  
Force Density ◽  
Mathematical Form ◽  
Minimum Mass ◽  
Two Dimensional ◽  
Simple Mathematical Model ◽  
Single Node ◽  
Michell Structure ◽  
Selection Of

Michelle structure is well known due to its optimization form & minimum mass of the structure. The idea has been adopted by James C Maxwell’s result on truss design. In this paper, we have presented the simple mathematical model of Michelle structure for the basic complexity order q=2 in the two-dimensional coordinate system. This mathematical model based on the construction of a structure that includes the analysis coordinate of all Nodes, and all member location of the structure along with analysis of their Connectivity matrices; these parameters form a whole tensegrity system of Michelle structure. The force density in each member of the structure has been investigated on every single node of structure individually. The mathematical form of structure has been developed in this research, which can be helpful to develop the high order complexity structure by applying the same methodology. The selection of bars and string has been carried out in a simple way. Moreover, the expression for calculating the minimum mass of structure has been defined at the end of this paper, which is the most important factor for constructing any kind of tensegrity structure.

scholarly journals Proposal of Optimization of Depth Values in Wet Gap Crossing Military Operations

2021 ◽  
Vol 16 (1) ◽  
pp. 35-47
Author(s):  
Martin Sedláček ◽  
Filip Dohnal
Keyword(s):  
Mathematical Model ◽  
Thermodynamic Properties ◽  
Military Operations ◽  
Gap Crossing ◽  
Selection Of ◽  
The Way

The paper discusses a possibility of application of dynamic vivacity function in interior ballistic process mathematical model. At present time, various technologies of powder grain surfacing are applied, mainly in case of powder grains used in assemblies of small-calibre cartridges. The grain surfacing can desirably influence the interior ballistic action. It can further change basic powder thermodynamic properties, and particularly, it can change the character of the powder grain burning, which cannot be described by geometric burning concept. According to the established standards, a necessity of the dynamic vivacity function L evaluation is determined for artillery powders only, but the way of its evaluation can be applied for arbitrary powder grains. The application of the dynamic vivacity function then allows to get results of solution of the interior ballistic tasks with higher accuracy, as well as the selection of suitable grain surfacing technology.

Tanks in the Spa Town. The New Book about the Events of the Year 1968 in Czechoslovakia

2019 ◽  
Vol 14 (1-2) ◽  
pp. 278-282
Author(s):  
Kirill A. Popov
Keyword(s):  
Fiftieth Anniversary ◽  
Warsaw Pact ◽  
Scientific Event ◽  
The Social ◽  
Prague Spring ◽  
The Subject ◽  
Scientific Terms ◽  
Selection Of ◽  
Regional Perspective ◽  
The Way

This review is devoted to the monograph by Jan Nedvěd “We do not decline our heads. The events of the year 1968 in Karlovy Vary”. The Karlovy Vary municipal museum coincided its publishing with the fiftieth anniversary of the Prague spring which, considering the way of the presentation, turned the book not only to scientific event but also to the social one. The book describes sociopolitical trends in the region before the year 1968, the development of the reformist movement, the invasion and advance of the armies of the Warsaw Pact countries, and finally the decline of the reformist mood and the beginning of the normalization. Working on his writing, the author deeply studied the materials of the local archive and gathered the unique selection of the photographs depicting the passage of the soviet army through the spa town and the protest actions of its inhabitants. In the meantime, Nedvěd takes undue freedom with scientific terms, and his selection of historiography raises questions. The author bases his research on the Czech papers and scarcely uses the books of Russian origin. He also did not study the subject of the participating of the GDR’s army in the operation Danube, although these troops were concentrated on the borders of Karlovy Vary region as well. Because of this decision, there are no materials from German archives or historiography in the monograph. In general, the work lacks the width of studying its subject, but it definitively accomplishes the task of depicting the Prague spring from the regional perspective.

CRITERIONS FOR THE EFFECTIVENESS OF SOCIALLY IMPORTANT INVESTMENT PROJECTS AND THEIR FORMULAS ADOPTED IN RUSSIAN PRACTICE

2020 ◽  
Vol 2 (8) ◽  
pp. 58-64
Author(s):  
A. F. AGEEVA ◽  
Keyword(s):  
Performance Indicators ◽  
Payback Period ◽  
Internal Rate Of Return ◽  
Investment Projects ◽  
Regulatory Documents ◽  
Project Analysis ◽  
Analytical Work ◽  
Methodological Approaches ◽  
Further Development ◽  
Selection Of

The article analyzes domestic guidelines for assessing the effectiveness of investment projects reflected in the regulatory documentation, both current and invalid. Considered are methodological approaches to calculating key performance indicators of investment projects - net discounted income, internal rate of return, discounted payback period and profitability index. The results of the analysis and recommendations for the further development of national regulatory documents for project analysis and methodological approaches to assessing the effectiveness of socially significant investment projects are presented. The results of the analytical work presented in the article are planned to be used to create a methodology for the selection of socially significant projects for the provision of state support.

Sign in / Sign up

Export Citation Format

Share Document