scholarly journals INFLUENCE OF USE COMPLETENESS OF ENGINEERING SYSTEM MODEL UPON ACCURACY AND ADEQUACY OF RELIABILITY ASSESSMENT

2016 ◽  
Vol 2016 (3) ◽  
pp. 210-215
Author(s):  
Татьяна Елисеева ◽  
Tatyana Eliseeva
Keyword(s):  
Reliability Assessment ◽  
System Model ◽  
Engineering System ◽  
Engineering Systems ◽  
Model Completeness ◽  
Source Data ◽  
Failure Tree ◽  
Accuracy Of Results ◽  
Definition Of ◽  
Significant Factors

An overall purpose of researches – improvement of assessment methods of engineering systems reliability at the stage of design. To achieve the end specified within the bounds of the investigation there was established that one of the most significant factors defining the effectiveness of the reliability assessment at the stage of designing is the completeness of a model used. For the assessment of model completeness by the example of a failure tree it was offered to determine a correlation between levels of a logical model of reliability and kinds of engineering consistency regulated by RSS 30709-2002 “Engineering Consistency. Terms and Definitions”. Within the bounds of the paper there is analyzed a minimum set of the sorts engineering consistency (dimensional consistency of system elements, compatibility of ele-ments according to reliability, interoperability) the account of which requires various degrees of detailed elaboration of a model and supposes the existence of corresponding source data including those established at the identification of logic connections between failures and the analysis of possible failures caused by a common reason. For the systematization of research results there is developed a matrix of correlation of analyzed kinds of engineering consistency with the levels of a failure tree and the values of the assessment of a quadratic means of deviation (QMD) of expected results. The mathematical dependences allowing the definition of QMD values at every level of the logic model of relia-bility are developed. To account for the progressive-ness of a QMD value at the decrease of assessment reliability by analogy with Taguchi function of losses it is offered to use a parabolic dependence. The approach offered is particularly urgent for methods where the accuracy of results obtained determines the degree of a risk of manufacturers caused by wrong or untimely management or technical decision-makings. The trend of risk changes for manufacturers depending on QMD of a resultant value allows explaining diagrams presented in the paper. The results obtained explain the dependence of accuracy and reliability of a reliability assessment on the completeness of use of the model and show a trend of the influence of parameters pointed out upon risk probability of manufacturers at the decisionmaking at the stage of designing.

Primer interfaced algorithm for non-linear optimization of engineering systems

2007 ◽  
Vol 221 (8) ◽  
pp. 955-960 ◽  
Author(s):  
G S Hegde ◽  
G M Madhu
Keyword(s):  
Optimization Problems ◽  
Linear Optimization ◽  
Numerical Algorithms ◽  
Engineering System ◽  
Engineering Systems ◽  
Non Linear ◽  
Multiple Variables ◽  
Accuracy Of Results ◽  
Decision Vector ◽  
System Designs

Majority of engineering system designs are deemed to be optimization problems with unknown multiple variables that are more than the known information and data. Several numerical algorithms have been evolved in the past half a decade in an attempt to improve the accuracy of results. The aim of this paper is to provide a perfect solver for the non-linear, single objective, and multi-variable optimization problems. The algorithm termed primer interfaced algorithm for non-linear optimization (PIANO) is a resolved solution methodology based on Hegde's primer value theorem. The methodology is formulated and developed by computing a primer adapter, which is interfaced with coefficient of the terms of constraints and objective functions to arrive at the decision vector. To demonstrate the procedure, two problems from the mechanics of structure are considered as exercises. The results are compared with the results recently published in the literature. The chosen examples for the optimization are a four bar truss and a simply supported beam with uniformly distributed load. The results of PIANO are compared with the results of fuzzy dynamic programming, and crisp optimal solutions are reported in the literature. The authors are sure of absolute contained perfection in the application of PIANO. To the authors' understanding, PIANO is original, new, and different.

scholarly journals The Factors affecting the implementation of electronic training in health care organization in Saudi Arabia: The case of King Abdulaziz university hospital: العوامل المؤثرة في تطبيق التدريب الإلكتروني في المنظمات الصحية- دراسة تطبيقية على موظفي مستشفى جامعة الملك عبد العزيز الإداريين بالمملكة العربية السعودية

2019 ◽  
Vol 3 (10) ◽  
Author(s):  
Sabah Abdullah Alsomali  ,   Amira AbdulAziz Alghamdi
Keyword(s):  
Health Care Organization ◽  
General Information ◽  
University Hospital ◽  
Care Organization ◽  
Health Organizations ◽  
Factors Affecting ◽  
King Abdulaziz University ◽  
Definition Of ◽  
Study Hypothesis ◽  
Significant Factors

The current study focused on the definition of electronic training and the importance of electronic training in the health organizations. The study main objective was to study the most significant factors that are affecting the electronic training application in the health organizations. The researcher used both a descriptive and analytical methods in her study. A questionnaire was used as a tool for data collection; the questionnaire was divided into two sections. The first section contained questions about general information that included: sex – age- qualification – experience in years – computer skills. The second section dealt with questions related to the study hypothesis. This section consists of four parts as follows: The first part included 11 statements about the reality of the electronic training in the health organizations in the present, which is considered the dependent variable in this study. The second part consists of 15 statements; the third part consists of 13 statements. The fourth part consists of 8 statements. These parts addressed the most significant factors that affected the implementation of the electronic training in the health organizations. These were the independent variables of the study. The questionnaire was distributed to a study sample of (368) employee in the hospital. A (200) questionnaire were collected on a rate of 54%. The Results of the study showed that the infrastructure for the Information technology and the government's tends towards the digital society were the most important factors that primarily affect the possibility of applying the electronic training in the health organizations. The main recommendations of the study were: the need for a support from the high and senior management in the king Abdul Aziz University hospital to adopt the electronic application of the electronic training and manage the resistance of change that many organization faces. The necessity of the electronic training for all the staff on computers skills. Finally, the importance of having a unit for the technical support king Abdul Aziz University hospital.

scholarly journals SCURTĂ INCURSIUNE ÎN LUMEA LITERARĂ A SCRIITORILOR CONTEMPORANI ROMÂNI DE EXPRESIE SPANIOLĂ

2021 ◽  
pp. 238-255
Author(s):  
Ioana CECOVNIUC ◽  
Keyword(s):  
Point Of View ◽  
Distinctive Features ◽  
Starting Point ◽  
Definition Of ◽  
Significant Factors

The aim of this paper is to briefly review the work of three contemporary Romanian poets from an ectopic point of view. Consequently, the starting point will be from Tomás Albaladejo Mayordomo’s definition of “ectopic literature” (2011), seen as the literature that is produced by an author who changes his usual topos (physical, socio-cultural and linguistic background) for an initially odd or peculiar one. Distinctive features of “ectopic literature” as well as significant factors - such as autobiographical data and main themes - are earmarked to be applied to the work for subsequent analysis.

Reliability assessment for multi-source data of mechanical parts of civil aircraft based on the model

2019 ◽  
Vol 33 (7) ◽  
pp. 3205-3211 ◽  
Author(s):  
Yuanyuan Guo ◽  
Youchao Sun ◽  
Longbiao Li ◽  
Xiaoming Tang
Keyword(s):  
Reliability Assessment ◽  
Mechanical Parts ◽  
Source Data ◽  
Civil Aircraft

scholarly journals Helmholtz’s decomposition for compressible flows and its application to computational aeroacoustics

2020 ◽  
Vol 1 (6) ◽  
Author(s):  
Stefan Schoder ◽  
Klaus Roppert ◽  
Manfred Kaltenbacher
Keyword(s):  
Flow Velocity ◽  
Compressible Flows ◽  
Base Flow ◽  
Computational Aeroacoustics ◽  
Helmholtz Decomposition ◽  
The Finite Element Method ◽  
Main Challenge ◽  
Source Data ◽  
Flow Domain ◽  
Definition Of

Abstract The Helmholtz decomposition, a fundamental theorem in vector analysis, separates a given vector field into an irrotational (longitudinal, compressible) and a solenoidal (transverse, vortical) part. The main challenge of this decomposition is the restricted and finite flow domain without vanishing flow velocity at the boundaries. To achieve a unique and $$L_2$$ L 2 -orthogonal decomposition, we enforce the correct boundary conditions and provide its physical interpretation. Based on this formulation for bounded domains, the flow velocity is decomposed. Combining the results with Goldstein’s aeroacoustic theory, we model the non-radiating base flow by the transverse part. Thereby, this approach allows a precise physical definition of the acoustic source terms for computational aeroacoustics via the non-radiating base flow. In a final simulation example, Helmholtz’s decomposition of compressible flow data using the finite element method is applied to an overflowed rectangular cavity at Mach 0.8. The results show a reasonable agreement with the source data and illustrate the distinct parts of the Helmholtz decomposition.

Definition of HMI Requirements for Automated Driving Vehicle Based on System Model

2018 ◽  
Vol 2018 (0) ◽  
pp. J1810104
Author(s):  
Shota KOMINATO ◽  
Hidekazu NISHIMURA ◽  
Yun SUNKIL ◽  
Takaaki TESHIMA ◽  
Haruka MIURA
Keyword(s):  
System Model ◽  
Automated Driving ◽  
Definition Of

scholarly journals Numerical modeling for the urban drainage gallery systems design

RBRH ◽  
2019 ◽  
Vol 24 ◽  
Author(s):  
José Carlos Bohnenberger ◽  
Kleos Magalhães Lenz Cesar Júnior ◽  
Maria Lúcia Calijuri
Keyword(s):  
Numerical Modeling ◽  
Systems Design ◽  
Urban Drainage ◽  
Urban Centers ◽  
Positive Effects ◽  
Recursive Solution ◽  
Correct Definition ◽  
Gallery System ◽  
Accuracy Of Results ◽  
Definition Of

ABSTRACT Considering the frequent flooding of urban centers, the financial limitations and the inefficient management of Urban Drainage (UD) systems in Brazilian municipalities, it is necessary that projects be developed efficiently. These objectives are achieved with the correct definition of the diameter and galleries slope, resulting in adequate hydraulic ratios. It is also necessary to guarantee the flow without backwater, by verifying the energy grade line along the network. There are software capable of assisting the calculation, which, however, do not report optimized solutions. A vector-based numerical modeling is presented for the optimized sizing of a UD gallery system. This model was applied in an area and its results were compared with those obtained by two software in the Brazilian market. It is demonstrated the optimization developed contributes to increases the efficiency in the design. The main scientific contributions are: to characterize and model the typical design slopes, to obtain the optimum slope combined with the smaller diameter; to explore the potential of the hydraulic ratios above those normally employed, with positive effects on the definition of {D, ig} and the economy in the system; and to implement a recursive solution from a cycle of interdependent information, ensuring accuracy of results.

scholarly journals Development and use of a cognitive system model for solving problems of purposeful behavior

2019 ◽  
Vol 16 (6) ◽  
pp. 77-86 ◽  
Author(s):  
A. A. Solodov ◽  
V. M. Trembach
Keyword(s):  
Knowledge Base ◽  
Intelligent System ◽  
Cognitive System ◽  
System Model ◽  
Cognitive Mechanism ◽  
Control Actions ◽  
Intellectual System ◽  
Purposeful Behavior ◽  
Multi Agent ◽  
Definition Of

The aim of the study is to formulate a formal definition of the cognitive system on the basis of a simplified representation of human cognitive activity and on this basis to develop methods for engineering design of the cognitive system model. The process of cognition is modeled as the interaction of several structures of the human personality. The main structures that directly implement the process of cognition are the subconscious mind and the consciousness interacting with it. Using the technique of engineering design of the cognitive model, the architecture of the intellectual system using the cognitive planning mechanism of control actions is developed. An agent-oriented approach was chosen to implement the cognitive mechanism of control actions formation. The algorithm of formation of purposeful behavior adaptation plans of intellectual system is investigated. The knowledge base of the intelligent system is built with the adaptation of purposeful behavior.The method of research is the application of the principles of the theory of dynamic automatic control systems to the simplified processes of cognition and the synthesis of algorithms and technical devices on this basis. The development of an intelligent system of purposeful behavior was conducted on the basis of an agent- oriented approach. To describe the mechanism of purposeful behavior, an integrated approach to knowledge representation is used, combining the advantages of logical and network methods. The main results of the work are the development of a formal definition of a cognitive system in the form of an automatic control system in the state space. The subconscious is modeled by the space of states of the cognitive system, formed as a result of interaction with the outside world. The process of cognition is presented in the form of evaluation by consciousness of the elements of the space of states, which is called the space of evaluations. Interaction with the outside world is modeled both in the form of management of the outside world, and in the form of its informing. On the basis of these representations the structure of the intellectual system realizing the cognitive mechanism of planning of control actions is developed. The architecture of multi-agent system of control actions formation for purposeful behavior is presented. The knowledge base for the formation of adaptation plans of purposeful behavior of the intellectual system is developed.For the key procedures of the cognitive system functioning, the concepts of optimal estimates of state vectors and optimal control process are introduced, which allow to synthesize the best in a certain sense algorithms and technical devices. The use of this technique allowed developing a structure of an intelligent system that implements cognitive mechanism for the planning of control actions; the multi-agent system architecture of formation control actions for goal-directed behavior; knowledge base of intellectual system for planning control actions. The intelligent system was developed using multi-agent technology. Subsystems were formed in the form of separate functional formations-multi-agent systems.

scholarly journals Fish-protecting Complex of a Water-engineering System

2013 ◽  
pp. 67-81
Author(s):  
Keyword(s):  
Experimental Research ◽  
Engineering System ◽  
Engineering Systems ◽  
Natural Reproduction ◽  
Fish Tracking ◽  
Pass Through ◽  
Water Work

Possible approaches to making fish-protecting complexes on water-engineering systems that enable to rehabilitate natural reproduction of pass-through and half pass-through species of fish and guarantee safe exploitation of water-work facilities of different purpose are considered. New versions of engineering solutions on upgrading of classical fish-running constructions and fish-tracking are put forward. Mathematical supports for offered engineering solutions are given. The results of experimental research are presented.

scholarly journals ANALISIS DISPLACEMENT PADA TIANG TUNGGAL DENGAN MENGGUNAKAN METODE PUSHOVER ANALYSIS

2020 ◽  
Vol 3 (2) ◽  
pp. 349
Author(s):  
Pieter Kristianto Syafrin ◽  
Chaidir Anwar Makarim ◽  
Amelia Yuwono
Keyword(s):  
Soft Soil ◽  
Pushover Analysis ◽  
Lateral Force ◽  
Pile Foundations ◽  
Engineering System ◽  
Single Pile ◽  
Drift Ratio ◽  
Single Piles ◽  
Definition Of ◽  
Capacity Method

All construction that is engineered and built rests on the ground must be supported by foundation. Foundation is the lowest part of structure that is done first and has important function in the construction of a building to continue the burden on the structure which will then be forwarded to the soil below. The term upper structure is generally used to describe part of an engineering system that carries a burden on the foundation or bottom structure. On the basis of the definition of this foundation, it can be explained that foundation is the most important part of the engineering system. (Bowles, 1991). Single pile foundations can be used on various types of soil and one of them is soft soil. To analyze elastic and non-elastic single piles in the condition of free heads and fixed heads in various dimensions, they were designed according to SNI 1726: 2012 and evaluated using the spectrum capacity method regulated in ATC-40. Based on the results of the study, a pile drift ratio and performace point values will be obtained which describe the behavior of the pile due to gradual lateral force. Results obtained describe the behavior of all the single pile models analyzed. AbstrakSemua konstruksi yang direkayasa dan dibangun bertumpu di tanah harus ditopang oleh fondasi. Fondasi adalah bagian terendah dari struktur yang dikerjakan terlebih dahulu dan memiliki fungsi penting dalam pembangunan sebuah bangunan untuk meneruskan beban struktur di atasnya yang kemudian akan diteruskan ke tanah dan bebatuan yang berada di bawah. Istilah struktur atas umumnya digunakan untuk menggambarkan bagian dari sistem rekayasa yang membawa beban pada pondasi atau struktur bawah. Atas dasar definisi yayasan ini, dapat dijelaskan bahwa yayasan adalah bagian terpenting dari sistem teknik. (Bowles, 1991). Fondasi tiang tunggal dapat digunakan pada berbagai jenis tanah dan salah satunya adalah tanah lunak. Untuk dapat menganalisis tiang tunggal elastis dan tidak elastis dalam kondisi kepala bebas dan kepala tetap dalam berbagai dimensi, mereka dirancang berdasarkan SNI 1726: 2012 dan dievaluasi menggunakan metode kapasitas spektrum yang diatur dalam ATC-40. Berdasarkan hasil penelitian, akan diperoleh suatu nilai pile drift ratio dan performace point yang menggambarkan perilaku tiang akibat diberikan gaya lateral secara bertahap.. Hasil yang diperoleh menggambarkan perilaku semua pemodelan tiang tunggal yang dianalisis.

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