scholarly journals Assessment of the efficiency of aircraft control data preparation by the method of technological sites

2019 ◽  
Author(s):  
A.G. Andreev ◽  
G.V. Kazakov
Keyword(s):  
Preparation Process ◽  
Data Preparation ◽  
Network Graph ◽  
New Approach ◽  
Flight Data ◽  
Aircraft Flight ◽  
Data Distortion ◽  
Data Volume ◽  
Typical Site

Nowadays methods for solving the problem of estimating the temporal characteristics of data processing are well studied and based on the timing performed operations, the use of the network graph, the construction of the spanning tree, etc. However, in solving some problems of automating controls, there may be difficulties associated with modeling the information processing and obtaining adequate input data for calculating the indicator of the timeliness of the system function implementation. The article considers general issues of assessing the properties determining the quality of aircraft flight data, its feasibility and timeliness. A new approach associated with the model "the presence of exactly one error in the generated data volume" is proposed for assessing the feasibility of aircraft flight data. This model is applicable only in the case when the control of feasibility is carried out for the entire set of necessary data. For timeliness index assessment, it is proposed to present the structure of the automated data preparation system in the form of a sequence of technological sites. Having determined the execution time of functional tasks by elements of a typical site and probabilities of data distortion, it is possible to calculate similar indicators for each elementary process included in the data preparation process and the system as a whole. An elementary data preparation process, the essence of which is to update the system database is considered as an example. This stage is the most representative, since all elements of the technological site are involved in its implementation.

scholarly journals Principles of design and development of automated system for aircraft flight data preparation

2019 ◽  
Author(s):  
A.G. Andreev ◽  
G.V. Kazakov ◽  
V.V. Koryanov
Keyword(s):  
Systems Approach ◽  
System Development ◽  
Automated System ◽  
Data Preparation ◽  
Design And Development ◽  
Flight Data ◽  
Aircraft Flight ◽  
Principles Of Design ◽  
Software Information

The problem of the quality of automated systems can be solved both from a common standpoint and from the standpoint of ensuring the quality of individual system components (software, information security tools, etc.). However, this leaves a number of particular questions due to the characteristics of a specific automated system. The occurrence of errors in the automated system for the preparation of aircraft flight data can lead to irreparable losses, the most damage is caused by design errors and incorrect general solutions implemented at the stage of system development. This necessitated the identification of specific principles of system design and development. The developed principles of designing an automated system consist, firstly, in determining its reference result, secondly, in identifying the main types of data and ensuring controlling their syntactic and semantic correctness, and, thirdly, in correct defining the boundaries of the system. The theoretical basis for the principles of the development of an automated system is the provisions of the systems approach, in particular, the new application of the system stratification tool. A typical automated data preparation system is considered as an example. It is shown that the use of the proposed principles allows avoiding or minimizing design errors and miscalculations and bringing the system representation stratification to a level that allows obtaining the necessary initial data and evaluating the quality indicators of the output data

Method for assessing the reliability of the output data prepared by automated system for aircraft flight data preparation

2019 ◽  
Author(s):  
A.G. Andreev ◽  
G.V. Kazakov ◽  
V.V. Koryanov
Keyword(s):  
Reliability Index ◽  
Process Model ◽  
Automated System ◽  
Control Procedure ◽  
Preparation Process ◽  
Data Preparation ◽  
Data Reliability ◽  
Flight Data ◽  
Aircraft Flight ◽  
Serial Connection

Methods for solving the problem of ensuring the reliability of information have been considered in the works of many domestic and foreign scientists. Nevertheless, when performing some tasks of automation of the activity of the personnel of the governing bodies, it may be difficult to calculate the required value of data reliability due to the complexity of the algorithms for calculating the confidence indicator and difficulties in obtaining adequate input data. A new method for assessing the reliability of aircraft flight data is considered on the basis of the special representation of the data preparing process as a serial connection of technological sections in time and calculating the reliability indicators for each element of the technological section and the technological section as a whole. The structure of a typical technological section includes a documentalist, an operator, hardware, software and a procedure for correcting erroneous data detected by the control procedure. The use of such a process model allows obtaining a simple recurrent algorithm for estimating the data reliability index for any technological section using the reliability index values for the previous technology sections. Having determined the probabilities of data distortion and the time of operation performing by elements of the technological section, it is possible to calculate the values of similar indicators for each elementary data preparation process and the system as a whole. An elementary data preparation process, the essence of which is to update the system database is considered as an example. This stage is the most representative one, since all elements of the technological section are involved in its implementation

Optimization of automated flight data preparation system design process

2021 ◽  
Author(s):  
A.G. Andreev ◽  
S.A. Zhurbin ◽  
G.V. Kazakov ◽  
V.V. Koryanov
Keyword(s):  
System Design ◽  
Design Process ◽  
Methodological Approach ◽  
Data Preparation ◽  
Practical Application ◽  
Design Decisions ◽  
Flight Data ◽  
Upper Level ◽  
Technical Measures

The paper introduces a methodological approach to optimizing the automated flight data preparation system design process by using organizational and technical measures to minimize the number of design errors and miscalculations of an accidental and deliberate nature. The study proposes to build the structure of the system design process according to the principle “from the general to the particular”, based on which the connections between different stages of design are determined in the form of surjective and bijective correspondences. In the diagram of design stages of the automated data preparation system, each lower level of the hierarchy is a decomposition of the elements of the adjacent upper level into more specific elements. The main methods of improving the quality of system design, methods of semantic control of the correctness of the design decisions, and syntactic control of the correctness of the developed documentation for the design of the automated data preparation system are proposed. The main thirteen problems of system design are considered, which, in practical application, will acquire a more specific form and significantly improve the designed system’s quality.

Principles of organization of information protection in automated system for aircraft flight data preparation

2020 ◽  
Author(s):  
A.G. Andreev ◽  
V.N. Zakharov ◽  
G.V. Kazakov ◽  
V.V. Koryanov
Keyword(s):  
Information Security ◽  
Automated System ◽  
General Nature ◽  
First Principle ◽  
Information Protection ◽  
Data Preparation ◽  
Basic Principles ◽  
Flight Data ◽  
Aircraft Flight ◽  
Number Of Publications

When designing automated systems for aircraft flight data preparation, many practical problems are solved by introducing either insufficient protection means or their redundancy. Both situations create information security vulnerability. On the basis of a number of publications analysis it is concluded that the basics of information security theory are reduced to the formulation of the main axioms, with the implication that there is currently no complete theory of information security of computer systems. As a result there are many issues, including issues of general nature, requiring some elaboration. The article considers a set of issues related to ensuring information security of the automated system for aircraft flight data preparation. The nature of two basic principles of information protection organization in this system is unraveled. The first principle requires consideration of all aspects related to the problem of ensuring information security of the system, and the second ― optimal control of means of information protection of the automated system of aircraft flight data preparation.

scholarly journals Method of evaluating indicator of the quality of development and commissioning the automated system for preparing aircraft flight data

2020 ◽  
Author(s):  
A.G. Andreev ◽  
G.V. Kazakov ◽  
V.V. Koryanov ◽  
N.N. Kotyashev
Keyword(s):  
Methodological Approach ◽  
Automated System ◽  
Analysis Method ◽  
Factors Affecting ◽  
Flight Data ◽  
Aircraft Flight ◽  
Hierarchy Analysis ◽  
Main Factors ◽  
Mathematical Processing

The quality of development and commissioning the automated system for preparing aircraft flight data (ASPD) depends on many factors, among which it is necessary to identify and justify those most significantly affecting quality of the system being commissioned. The practice of designing an ASPD has shown that the quality assessment based on its characteristics is nothing more than a consequence. This situation is due to the presence of deeper factors that will only appear during the operation of the system. To eliminate this situation, the problem is formulated as a task of determining the factors affecting the quality of development and commissioning the system, based on the data obtained by mathematical processing of expert estimates of each factor significance. To solve this problem, it is proposed to use the hierarchy analysis method. Developed on its basis the methodological approach makes it possible: – to identify the main factors significantly affecting the quality of the ASPD being commissioned, and to propose qualitative scales for assessing the degree of feasibility of each generic criterion; – to formalize a multi-criteria indicator of the degree of the ASPD quality compliance with the requirements of generic criteria and obtain its dependence on the levels of development and commissioning the system; – to justify the requirements for ASPD operational suitability, perform its evaluation, as well as determine the necessary measures for implementing the specified requirements on operational and technical characteristics of the ASPD.

Guideline for the management of long tunnelled external ventricular drains in chronic hydrocephalus

2021 ◽  
Vol 30 (7) ◽  
pp. 416-421
Author(s):  
Phillip Correia Copley ◽  
John Emelifeonwu ◽  
Pasquale Gallo ◽  
Drahoslav Sokol ◽  
Jothy Kandasamy ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Nursing Care ◽  
Pilocytic Astrocytoma ◽  
Parental Education ◽  
Chronic Hydrocephalus ◽  
Treatment Protocols ◽  
New Approach ◽  
Viable Treatment

This article reports on the journey of a child with an inoperable hypothalamic-origin pilocytic astrocytoma causing hydrocephalus, which was refractory to treatment with shunts, and required a new approach. With multidisciplinary support, excellent nursing care and parental education, the child's hydrocephalus was managed long term in the community with bilateral long-tunnelled external ventricular drains (LTEVDs). This article describes the patient's journey and highlights the treatment protocols that were created to achieve this feat. Despite the difficulties in initially setting up these protocols, they proved successful and thus the team managing the patient proposed that LTEVDs are a viable treatment option for children with hydrocephalus in the context of inoperable tumours to help maximise quality of life.

Analyzing of UVLC system considering the effect of water depth

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mustafa B. Al-Deen ◽  
Mazin Ali A. Ali ◽  
Zeyad A. Saleh
Keyword(s):  
Coastal Water ◽  
Water Depth ◽  
Bit Error Rate ◽  
Multiple Input Multiple Output ◽  
Visible Light Communications ◽  
New Approach ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Depth Water

Abstract This paper presents a new approach to discover the effect of depth water for underwater visible light communications (UVLC). The quality of the optical link was investigated with varying water depth under coastal water types. The performance of the UVLC with multiple input–multiple output (MIMO) techniques was examined in terms of bit error rate (BER) and data rate. The theoretical result explains that there is a good performance for UVLC system under coastal water.

A new approach based on graph matching and evolutionary approach for sport scheduling problem

2020 ◽  
pp. 1-16
Author(s):  
Meriem Khelifa ◽  
Dalila Boughaci ◽  
Esma Aïmeur
Keyword(s):  
Graph Matching ◽  
State Of The Art ◽  
Travel Cost ◽  
Round Robin ◽  
New Approach ◽  
Traveling Tournament Problem ◽  
Significant Interest ◽  
National League ◽  
Better Than

The Traveling Tournament Problem (TTP) is concerned with finding a double round-robin tournament schedule that minimizes the total distances traveled by the teams. It has attracted significant interest recently since a favorable TTP schedule can result in significant savings for the league. This paper proposes an original evolutionary algorithm for TTP. We first propose a quick and effective constructive algorithm to construct a Double Round Robin Tournament (DRRT) schedule with low travel cost. We then describe an enhanced genetic algorithm with a new crossover operator to improve the travel cost of the generated schedules. A new heuristic for ordering efficiently the scheduled rounds is also proposed. The latter leads to significant enhancement in the quality of the schedules. The overall method is evaluated on publicly available standard benchmarks and compared with other techniques for TTP and UTTP (Unconstrained Traveling Tournament Problem). The computational experiment shows that the proposed approach could build very good solutions comparable to other state-of-the-art approaches or better than the current best solutions on UTTP. Further, our method provides new valuable solutions to some unsolved UTTP instances and outperforms prior methods for all US National League (NL) instances.

scholarly journals A New Approach to Assess the Quality of Small High-Speed Centrifugal Fans Using Noise Measurement

1999 ◽  
Vol 5 (2) ◽  
pp. 147-153 ◽  
Author(s):  
Dingjun Cui ◽  
Ian A. Craighead
Keyword(s):  
Signal Processing ◽  
Quality Assessment ◽  
Condition Monitoring ◽  
High Speed ◽  
Noise Levels ◽  
New Approach ◽  
Commercial Market ◽  
Centrifugal Fans ◽  
Special Approach

The requirements for a special approach for the quality assessment of small high-speed centrifugal fans are outlined and a new parameter designating the noise levels from the product in comprehensive form will be discussed and described as a criterion for such quality assessment.By applying techniques of signal processing and condition monitoring, the sources of the vibration and noise in different sections of the product can be identified, then the noise from each source from different components can be determined. Using this criterion, more aspects of the quality of the products can be assessed and suggestions to improve the quality of the products can be made. Finally, the assessment of a number ofvacuum cleaner motor/fan units available in the commercial market will be presented and compared with conventional specifications. It will be shown that the new parameter provides a more useful indication of appliance quality.

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