scholarly journals The method of assessment and formation the availability of the subsystem ensuring fitness for means of transport

2019 ◽  
Vol 302 ◽  
pp. 01003
Author(s):  
Sylwester Borowski ◽  
Anna Mazurkiewicz ◽  
Magda Czyżewska
Keyword(s):  
The State ◽  
Operation System ◽  
Complex Operation ◽  
Calculation Results ◽  
Method Of Assessment ◽  
Typical Calculation

In systems of means of transport operation in order to achieve appropriate completion of assigned transportation tasks it is necessary to maintain a required number of means of transport in the state of availability for carrying out of transportation task (roadworthy and stocked). In general, the processes of rendering vehicles roadworthy are connected to supplying them with fuel and operational materials, carrying out services and repairs, condition diagnostics. In the analyzed system of transport means operation, the processes are carried out in serviceability assurance subsystem SAS. In complex operation systems, the processes of rendering technical objects roadworthy are carried out at specifically designed technical infrastructure posts. The possibility of carrying out the assigned service and repair tasks depends on the availability and the number of such posts. The article presents the method of defining the operational availability and the number of technical infrastructure posts required for appropriate functioning of assigned service and repair task. Then typical calculation results are presented in charts prepared on the basis of data obtained from tests at existing transport means operation system.

scholarly journals Method of Determining the Required Number of Technical Backup Area Posts

2017 ◽  
Vol 44 (1) ◽  
pp. 81-96
Author(s):  
Klaudiusz Migawa ◽  
Maciej Woropay ◽  
Maciej Gniot ◽  
Monika Salamońska
Keyword(s):  
Operation System ◽  
Group Of Units ◽  
Complex Operation ◽  
Calculation Results ◽  
Typical Calculation

Abstract In complex operation systems, the processes of rendering technical objects roadworthy are carried out at specifically designed technical backup area posts. The article presents the method of defining the number of technical backup area posts required for appropriate functioning of assigned service and repair task. Then typical calculation results are presented in charts prepared on the basis of data obtained from tests at existing transport means operation system. The presented method makes it possible to analogically determine the minimum required number of posts for carrying out the assigned service and repair task for both a subsystem comprised of a group of units a given group of posts or an individual post in traffic maintenance and intervention subsystems.

Determination and Comparison of Optimal Placement Scheme for Dalian Internatioanl Trade Mansion

2011 ◽  
Vol 243-249 ◽  
pp. 5219-5222 ◽  
Author(s):  
Ting Hua Yi ◽  
Hong Nan Li ◽  
Ming Gu
Keyword(s):  
Dynamic Behavior ◽  
Sensor Placement ◽  
Flexible Structures ◽  
Vibration Characteristics ◽  
Tall Building ◽  
The State ◽  
Optimal Placement ◽  
Optimal Sensor Placement ◽  
Structural Dynamic ◽  
Calculation Results

This paper considers the problem of locating sensors on the flexible structures with the aim of maximizing the data information so that structural dynamic behavior could be fully characterized. Since only translational degrees of freedoms (DOFs) are considered for possible sensor installation in the state-of-the-practice, a method which could avoid distinguishing the translational and rotational DOFs is presented. In order to realize the proposed method and to demonstrate its effectiveness, three different sensor placement techniques, EfI, EfI-DPR and Uniform, were employed to a super tall building. The calculation results showed that the proposed method is easy in understanding and could be used practically by civil engineers. EfI method provides a more effective method for optimal sensor placement than other ones to identify the vibration characteristics of the studied building.

scholarly journals Express method of assessment of compliance of the object of supervision with fire safety requirements

2021 ◽  
pp. 29-35
Author(s):  
Sergey E. Mordvinenko ◽  
Aleksandr V. Ershov ◽  
Denis S. Pikush
Keyword(s):  
Decision Making ◽  
Fire Safety ◽  
Human Life ◽  
Fire Risk ◽  
The State ◽  
Express Method ◽  
Managerial Decision ◽  
Managerial Decision Making ◽  
Safety Requirements ◽  
Method Of Assessment

Introduction. The paper considers the new requirements for the activities of the state fire supervision bodies. The ways of solving the problems arising during the implementation of these innovations are given. One of such solutions is the developed by the authors algorithm of the express method for assessing the compliance of the object of supervision with fire safety requirements. The article analyzes the work of inspectors of the state fire supervision during inspections of low-rise retail facilities of small area, taking into account the time spent on them, and the work of the inspector using a new express method of conducting inspections. Problem Statement. The purpose of the study is to increase the efficiency of managerial decision-making in ensuring fire safety based on the criterion of "fire risk", taking into account the minimum fire safety requirements determined by the calculation. Conclusions. The developed algorithm for supporting managerial decision-making on the compliance of the protection of commercial facilities with fire safety requirements will allow inspectors of the state fire supervision during inspections to assess the existence of a threat to human life and health and decide on further actions depending on the presence or absence of this threat.

Influence of the weight coefficients of measurements on the consistency of the assessment and calculation results of the power supply system steady-state operation conditions

2021 ◽  
Vol 25 (2) ◽  
pp. 172-182
Author(s):  
A. M. Glazunova ◽  
I. N. Kolosok
Keyword(s):  
Steady State ◽  
Power Supply ◽  
Power Supply System ◽  
State Assessment ◽  
The State ◽  
Steady State Mode ◽  
Test Circuit ◽  
Calculation Results ◽  
Control Equation ◽  
Weight Coefficients

The aim of this work is to develop an improved procedure for assessing the state of power supply systems based on adjusting the weight coefficients of measurements. To this end, non-linear optimisation methods were used. The control equations and the solution of the simultaneous linear equations were performed using the Crout method. The results of the calculation of the electrical power steady-state mode were considered as a reference. The lower the difference between the evaluation and steady-state calculation results, the higher the accuracy of the overall state assessment procedure. The problem of correcting the weight factors is set and solved as a nonlinear optimisation problem, where the optimisation parameters are taken as the dispersion of the measurements. The objective function was formulated as follows: to minimise the measurement evaluation dispersions that are part of a single control equation by maximising the active power measurements dispersion in the swing bus of the power supply system. In this study, limitations in the form of equation and inequality are monitored. The problem of optimising the dispersions is solved after the first iteration of the state assessment; starting with the second iteration, the state assessment is performed with new measurement weight factors. The calculations were performed on a 6-node test circuit. The control equations are drawn from the current measurements. The measurements data on the selected control equation of the test circuit are used to calculate the target function. The accuracy of the dispersions redistribution and their extreme values are controlled by the limitations. The results showed that, when adjusting the dispersion of measurements, the power assessments at all nodes are closer to the steady-state mode calculation results.

State Estimation Based on Ensemble DA–DSVM in Power System

2019 ◽  
Vol 29 (05) ◽  
pp. 653-669
Author(s):  
Shunjiang Wang ◽  
Baoming Pu ◽  
Ming Li ◽  
Weichun Ge ◽  
Qianwei Liu ◽  
...  
Keyword(s):  
Power Systems ◽  
Power System ◽  
State Estimation ◽  
Graphics Processing Unit ◽  
Estimation Algorithm ◽  
The State ◽  
Support Vector ◽  
Processing Unit ◽  
Central Processing ◽  
Calculation Results

This paper investigates the state estimation problem of power systems. A novel, fast and accurate state estimation algorithm is presented to solve this problem based on the one-dimensional denoising autoencoder and deep support vector machine (1D DA–DSVM). Besides, for further reducing the computation burden, a partitioning method is presented to divide the power system into several sub-networks and the proposed algorithm can be applied to each sub-network. A hybrid computing architecture of Central Processing Unit (CPU) and Graphics Processing Unit (GPU) is employed in the overall state estimation, in which the GPU is used to estimate each sub-network and the CPU is used to integrate all the calculation results and output the state estimate. Simulation results show that the proposed method can effectively improve the accuracy and computational efficiency of the state estimation of power systems.

An Investigation of Deterministic Realistic Method for LBLOCA Mass and Energy Release Evaluation for CPR1000 NPPs

2013 ◽  
Author(s):  
Jianshu Lin ◽  
Chengjun Zhuang ◽  
Jinzhen Leng ◽  
Ting Wang ◽  
Zhenhua Zhang
Keyword(s):  
Energy Release ◽  
Conventional Method ◽  
Safety Analysis ◽  
New Method ◽  
Nuclear Technology ◽  
Complex Operation ◽  
Calculation Results ◽  
Conservative Result ◽  
Containment Pressure

With the development of nuclear technology, safety analysis methodologies were advancing from traditional conservative to more realistic approaches. For CPR1000-type NPP, the Conventional Method (CM) which employed MEDUSE, PERSEE and REFLET codes in order was still in use to evaluate the LB LOCA mass and energy release (MER). This complex operation yielded excess conservative result as well as inconvenience. Meanwhile, a deterministic realistic method (MDR) had been applied using Realistic code CATHARE GB for LB LOCA MER analysis in EPR design. In this paper, CPR1000 NPP LB LOCA MER calculation was carried out using MDR method with CATHARE GB code. Calculation results were compared with those obtained through the conventional method to assess the containment pressure margin gain. Further effort was needed to evaluate the feasibility of implementing the new method in CPR1000-type NPP applications.

scholarly journals Method Based on Rough Set and Improved Petri Net for Transformer Faults Diagnosis

2015 ◽  
Vol 11 (8) ◽  
pp. 25
Author(s):  
Chengyu Sun ◽  
XiaoGuang Yue
Keyword(s):  
State Space ◽  
Rough Set ◽  
Chromatographic Analysis ◽  
State Equation ◽  
The State ◽  
Transformer Oil ◽  
Ratio Method ◽  
Diagnostic Model ◽  
Matrix Operations ◽  
Calculation Results

Oil chromatographic analysis is widely used in transformer fault diagnosis, but it is difficult to establish accurate maping relationship between the parameter space and the state space, and there is information complexity. This paper adopts the combined diagnostic model of rough sets and petri nets, firstlysimplifies the complex system which contains complicated discrete information by rough set to solve the state space limitations of Petri network; and improves petri network based on mining association rules, adopts the correlation matrix and state equation method to improve the reasoning speed, at the same time turns the diagnosis into matrix operations to change complex calculations to simple math which has certain applicability. Finally the algorithm is applied to gas chromatographic analysis in transformer oil, the calculation results is the same with IEC three ratio method, which proves that this method can quickly and accurately to judge the running state of transformer, so as to improve the safety, stability and economic operation of the flat water transformer.

A new analysis of recuperative gas turbine cycles

1998 ◽  
Vol 212 (4) ◽  
pp. 289-296 ◽  
Author(s):  
R Cai
Keyword(s):  
Heat Transfer ◽  
Gas Turbine ◽  
Pressure Ratio ◽  
Optimum Pressure ◽  
Calculation Results ◽  
New Criterion ◽  
Gas Turbine Cycle ◽  
Cycle Efficiency ◽  
Analytical Expressions ◽  
Typical Calculation

It is shown that the classical recuperator effectiveness is not an appropriate evaluation criterion for the gas turbine recuperator or a suitable independent thermodynamic parameter of the recuperative gas turbine cycle. Another parameter—the average heat transfer temperature difference in the recuperator—is recommended as the new criterion instead of the recuperator effectiveness. Therefore, the original classical analysis results of the recuperative gas turbine cycle are also inappropriate and it is necessary to give a new analysis. In this paper, the analytical expressions of the simple recuperative cycle efficiency and the optimum pressure ratio based on the new criterion are derived from general simplified assumptions. Some typical calculation results are also presented. With this new criterion, the optimum pressure ratio values for efficiency of a simple recuperative gas turbine cycle do not vary very much with the temperature ratio and are approximately equal to 3, much lower than the figures generally recognized before. A similar analysis for the recuperative gas turbine cycle with intercooler and reheater and an analysis ensuring approximately constant recuperator heat transfer area per unit power output are given also.

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