scholarly journals An Analysis and Testing of Functional Availability Military Vehicles, in the Aspect of Reliability

2019 ◽  
Vol 49 (1) ◽  
pp. 405-423
Author(s):  
Kamil Przybysz
Keyword(s):  
Mathematical Model ◽  
Markov Process ◽  
Model Based ◽  
Military Vehicles ◽  
Different Types ◽  
The Military ◽  
Exploitation Intensity ◽  
The Way

Abstract The paper pertains to matters related to the quantification of functional availability of military vehicles, with reference to exploitation intensity and reliability aspects. The conducted exploitation research paved the way for elaborating methods of determining functional availability for military vehicles, in particular focusing on exploitation intensity and reliability. The essential research was conducted using the developed mathematical model based on the probabilistic, stochastic Markov process, which allowed modelling the process of changes in the exploitation states of military vehicles. In the course of the research, which enabled the authors to estimate the functional availability value, four-layered probes of the military vehicles were used (different types and makes), from the second exploitation phase, with varied mileage from the beginning of the exploitation and average mileage per year.

scholarly journals THE QUANTIFICATION METHOD OF FUNCTIONAL AVAILABILITY MILITARY VEHICLES

2020 ◽  
Author(s):  
Kamil Przybysz
Keyword(s):  
Mathematical Model ◽  
Markov Process ◽  
Accurate Estimation ◽  
Technical Object ◽  
Quantification Method ◽  
Model Based ◽  
Military Vehicles ◽  
Operational Quality ◽  
Operational Data ◽  
Exploitation System

The availability is one of the most important feature of a technical object which shapes its operational quality. The paper undertakes the issue related to the quantification of functional availability of vehicles, with reference to reliability aspects. The conducted exploitation research paved the way for elaborating methods of determining functional availability for vehicles, in particular focusing on reliability. The essential research was conducted using the developed mathematical model based on the probabilistic, stochastic Markov process, which allowed modelling the process of changes in the exploitation states of vehicles. In view of the above, it is essential to develop methods that enable the most accurate estimation of the functional availability of vehicles. Knowing the values of functional availability, we can estimate the probability of performing assigned tasks and precisely control the vehicle exploitation system, especially in terms of availability, which is important for vehicles. This work presents a method for determining the functional availability of vehicles, taking into account the limitations introduced by the vehicle exploitation system.  Particular attention was paid to the possibility of using probabilistic, stochastic semiMarkov models, whose rules and method of creation were generally described, with regard to the ability to acquire operational data in the vehicle exploitation system.

A generic fuzzy electrohydraulic steering controller for off-road vehicles

2003 ◽  
Vol 217 (9) ◽  
pp. 791-799 ◽  
Author(s):  
Qin Zhang
Keyword(s):  
Mathematical Model ◽  
Fuzzy Controller ◽  
Steering Control ◽  
Road Vehicles ◽  
Heuristic Knowledge ◽  
Road Vehicle ◽  
Model Based ◽  
System Validation ◽  
Different Types ◽  
Validation Tests

A fuzzy controller, unlike most other mathematical model-based controllers, incorporates human heuristic knowledge on how to control a plant. Since the representation of the heuristic knowledge for controlling similar plants is often the same, it is possible to design a generic fuzzy controller to control those plants. This paper presents a method for designing a generic fuzzy electrohydraulic steering controller usable for various types and/or models of wheel-type off-road vehicle. This research found that it was possible to design one generic fuzzy controller to steer different types and/or models of wheel-type vehicle having similar steering mechanisms. The only required modification was to redefine the domain of fuzzy values to make them represent the controllable range of the particular steering actuating system. Validation tests verified that this generic fuzzy controller was capable of accomplishing satisfactory steering control on five types and/or models of agricultural vehicle.

scholarly journals Tactical Analysis Through Objective Data in Football

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Akira Yamanaka ◽  
Hiroshi Otsuka ◽  
Tatsuya Deguchi ◽  
Ken Okihara ◽  
Dota Otsuka ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Team Sports ◽  
Numerical Data ◽  
Objective Data ◽  
Match Analysis ◽  
Model Based ◽  
Video Images ◽  
Different Types ◽  
The Mathematical Model ◽  
Insight Into

<p>Tactical analysis in football has rarely been conducted using a mathematical model with numerical data (although tactical analysis through objective data has been used more often). Therefore, this study establishes principles for tactical analysis in team sports using numerical data, through a mathematical model based on the location of the players and the ball. A competitive match between Sanfrecce Hiroshima (home) and Ehime FC (away) in the third round of the Japanese Emperor’s Cup 2011 was filmed and used for the match analysis. Observations were made by a team analyst as well as extracted from official match records. The main procedure in the research flow was to establish a mathematical offence/defence model based on tactical concepts in football, which was applied for the location of players, which, in turn, was quantified from video images in order to categorise a team’s tactical performance (in relation to attacking or defending). Furthermore, the authors focused on attacking categories and identified different types of passes during a specific period, as well as comparing these findings with an actual match video. The results obtained from the numerical data derived from applying the offence/defence model led to the same overview as the tactical analysis produced by a team analyst. In addition, the results when categorising types of passes (as extracted through the mathematical model) again mirrored those retrieved from an actual match video. This leads to the conclusion that the offence/defence model could provide relevant insight into types of attacks. The data revealed that football tactical analysis can be successfully performed using a numerical model, which might possibly enable automatic tactical analysis of football games without a match analyst.</p>

DETERMINATION OF PERFORMANCE INDICATORS OF THE TRUCK KrAZ-6510TE

2020 ◽  
pp. 19-26
Author(s):  
Olexandr Pavlenko ◽  
Serhii Dun ◽  
Maksym Skliar
Keyword(s):  
Mathematical Model ◽  
Surface Friction ◽  
Building Structures ◽  
Maximum Torque ◽  
Military Equipment ◽  
Military Vehicles ◽  
Force Magnitude ◽  
Vehicle Mobility ◽  
The Mathematical Model

In any economy there is a need for the bulky goods transportation which cannot be divided into smaller parts. Such cargoes include building structures, elements of industrial equipment, tracked or wheeled construction and agricultural machinery, heavy armored military vehicles. In any case, tractor-semitrailer should provide fast delivery of goods with minimal fuel consumption. In order to guarantee the goods delivery, tractor-semitrailers must be able to overcome the existing roads broken grade and be capable to tow a semi-trailer in off-road conditions. These properties are especially important for military equipment transportation. The important factor that determines a tractor-semitrailer mobility is its gradeability. The purpose of this work is to improve a tractor-semitrailer mobility with tractor units manufactured at PJSC “AutoKrAZ” by increasing the tractor-semitrailer gradeability. The customer requirements for a new tractor are determined by the maximizing the grade to 18°. The analysis of the characteristics of modern tractor-semitrailers for heavy haulage has shown that the highest rate of this grade is 16.7°. The factors determining the limiting gradeability value were analyzed, based on the tractor-semitrailer with a KrAZ-6510TE tractor and a semi-trailer with a full weight of 80 t. It has been developed a mathematical model to investigate the tractor and semi-trailer axles vertical reactions distribution on the tractor-semitrailer friction performances. The mathematical model has allowed to calculate the gradeability value that the tractor-semitrailer can overcome in case of wheels and road surface friction value and the tractive force magnitude from the engine. The mathematical model adequacy was confirmed by comparing the calculations results with the data of factory tests. The analysis showed that on a dry road the KrAZ-6510TE tractor with a 80 t gross weight semitrailer is capable to climb a gradient of 14,35 ° with its coupling mass full use condition. The engine's maximum torque allows the tractor-semitrailer to overcome a gradient of 10.45° It has been determined the ways to improve the design of the KrAZ-6510TE tractor to increase its gradeability. Keywords: tractor, tractor-semitrailer vehicle mobility, tractor-semitrailer vehicle gradeability.

Facial recognition technologies and the new physiognomic era

2020 ◽  
Vol 43 (2) ◽  
pp. 45-56
Author(s):  
Abigail Nieves Delgado
Keyword(s):  
Facial Recognition ◽  
Personal Identification ◽  
Digital Photographs ◽  
Different Types ◽  
Recognition Systems ◽  
The Way

The current overproduction of images of faces in digital photographs and videos, and the widespread use of facial recognition technologies have important effects on the way we understand ourselves and others. This is because facial recognition technologies create new circulation pathways of images that transform portraits and photographs into material for potential personal identification. In other words, different types of images of faces become available to the scrutiny of facial recognition technologies. In these new circulation pathways, images are continually shared between many different actors who use (or abuse) them for different purposes. Besides this distribution of images, the categorization practices involved in the development and use of facial recognition systems reinvigorate physiognomic assumptions and judgments (e.g., about beauty, race, dangerousness). They constitute the framework through which faces are interpreted. This paper shows that, because of this procedure, facial recognition technologies introduce new and far-reaching »facialization« processes, which reiterate old discriminatory practices.

Legislation and the Constitutional Framework

2018 ◽  
Author(s):  
Eva Steiner
Keyword(s):  
Civil Law ◽  
Primary Source ◽  
Legislative Process ◽  
French Law ◽  
Major Overhaul ◽  
Different Types ◽  
The Way

This chapter introduces the main constitutional institutions and mechanism governing France, taking into account the major overhaul of the 1958 Constitution in 2008. It also shows that legislation is the primary source of law in France, that there are different types of legislation, and that legislative sources are organised hierarchically. Moreover, the chapter also considers, within the constitutional framework, the legislative process and examines the way in which bills are drafted. It also seeks to familiarise readers with the layout of a French statute. In addition, this chapter shows that much of French law though not all of it is codified. Codification is a particular legislative technique common to most civil law systems.

Imagery in the Book of Revelation

2020 ◽  
pp. 52-67
Author(s):  
Konrad Huber
Keyword(s):  
Reception History ◽  
Book Of Revelation ◽  
Imperial Cult ◽  
Emotional Effect ◽  
Greco Roman ◽  
Different Types ◽  
Figurative Speech ◽  
Theological Message ◽  
Over Time ◽  
The Way

The chapter first surveys different types of figurative speech in Revelation, including simile, metaphor, symbol, and narrative image. Second, it considers the way images are interrelated in the narrative world of the book. Third, it notes how the images draw associations from various backgrounds, including biblical and later Jewish sources, Greco-Roman myths, and the imperial cult, and how this enriches the understanding of the text. Fourth, the chapter looks at the rhetorical impact of the imagery on readers and stresses in particular its evocative, persuasive, and parenetic function together with its emotional effect. And fifth, it looks briefly at the way reception history shows how the imagery has engaged readers over time. Thus, illustrated by numerous examples, it becomes clear how essentially the imagery of the book of Revelation constitutes and determines its theological message.

Optimal control strategy for cancer remission using combinatorial therapy: A mathematical model-based approach

2021 ◽  
Vol 145 ◽  
pp. 110789
Author(s):  
Parthasakha Das ◽  
Samhita Das ◽  
Pritha Das ◽  
Fathalla A. Rihan ◽  
Muhammet Uzuntarla ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Optimal Control ◽  
Control Strategy ◽  
Optimal Control Strategy ◽  
Combinatorial Therapy ◽  
Model Based ◽  
Cancer Remission

The ‘disappeared’ in Argentina 1976–1980

1980 ◽  
Vol 9 (3) ◽  
pp. 41-43 ◽  
Author(s):  
Malcolm Coad
Keyword(s):  
Latin America ◽  
Buenos Aires ◽  
Military Coup ◽  
Daily Newspaper ◽  
Security Forces ◽  
Robert Cox ◽  
The Military ◽  
The Disappeared ◽  
The Way

We publish below a list of writers and journalists abducted by the security forces and numbered among the ‘disappeared’ in Argentina since 24 March 1976, the date of the military coup that installed General Jorge Rafael Videla in power. Two eye-witness accounts illustrate the way in which such abductions usually take place. Finally, Robert Cox, editor-in-exile of the daily newspaper Buenos Aires Herald, describes how independent-minded journalists and the families of los desaparecidos ( ‘the disappeared’) have been affected. The material is introduced by Index on Censorship's researcher on Latin America, Malcolm Coad.

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