scholarly journals DYNAMICS AND OPERATING CYCLES OF VIBRATORY-PERCUSSIVE SYSTEMS INVOLVED IN IMPLEMENTATION OF ADAPTIVE TECHNOLOGIES

2021 ◽  
Vol 2 (4) ◽  
pp. 67-77
Author(s):  
Vadim V. Plokhikh ◽  
Boris B. Danilov ◽  
Dmitry O. Cheshchin
Keyword(s):  
Simulation Modeling ◽  
Dynamic Parameters ◽  
Flow Data ◽  
Operating Cycle ◽  
Robotic Drilling ◽  
Research Findings ◽  
Adaptive Technologies ◽  
Operating Cycles

The study discusses serviceability of pneumatic and hydraulic percussion machines within robotic drilling systems. The newly designed action charts of percussion machines allow varying flow data of the machines versus properties of the medium being treated, which enables technological adaptability of the machines. Simulation modeling of the operating cycle dynamics in ITI SimulationX made it possible to determine dynamic parameters of vibratory-percussive systems. The research findings prove designability of such machines.

scholarly journals OFDM signal with BPSK modulated subcarriers for multi-carrier ionospheric sounding

2019 ◽  
Vol 30 ◽  
pp. 15006
Author(s):  
Vladimir Ivanov ◽  
Natalya Ryabova ◽  
Alexey Elsukov ◽  
Alexey Laschevsky
Keyword(s):  
Mathematical Model ◽  
Simulation Modeling ◽  
Wide Band ◽  
Ofdm Signal ◽  
Research Findings ◽  
Ionospheric Sounding ◽  
Bpsk Modulation

Paper presents the developed algorithm for multi-carrier simultaneous vertical ionospheric sounding by OFDM signal with BPSK modulation of subcarriers. There is presented a mathematical model, numerical and simulation modeling with the use of USRP platform. Research findings proved the fundamental feasibility of using orthogonal subcarriers for simultaneous sounding of channels over a wide band.

Design approach for maximising contacting filament seal performance retention

2014 ◽  
Vol 229 (5) ◽  
pp. 926-942 ◽  
Author(s):  
Ingo HJ Jahn
Keyword(s):  
Gas Turbines ◽  
Labyrinth Seal ◽  
Generic Properties ◽  
Labyrinth Seals ◽  
Blow Down ◽  
Operating Cycle ◽  
And Performance ◽  
Gas Turbine Cycle ◽  
Operating Cycles ◽  
The Ideal

Good sealing is a key requirement for modern efficient turbomachinery such as steam and gas turbines. A class of seals that promise better performance, compared to conventional labyrinth seals, are contacting filament seals such as brush, leaf, or finger seal. When new, these filament seals offer better performance; however, if poorly designed they wear excessively, resulting in leakages higher than a comparable labyrinth seal. This paper outlines a design methodology for selecting ideal contacting filament seal properties for a given operating cycle or set of operating cycles. Following this approach ensures the seal performs well, the seal retains its performance, and performance is retained if the operating cycle is altered. In the approach, the seals are described by four generic properties (stiffness, blow-down, cross-coupling, and build clearance), which are then used for a performance evaluation based on a number of test cycles. Once the ideal seal properties for a given operating cycle have been identified, a seal to match these can be designed. The approach is evaluated with a generic gas turbine cycle and recommendations for ideal contacting filament seal properties for this cycle are made.

Low-Technology Demonstrations of the Role of Peripheral Vision in Human Factors and Ergonomics

2002 ◽  
Vol 46 (8) ◽  
pp. 793-797
Author(s):  
William F. Moroney
Keyword(s):  
Visual Field ◽  
Optical Flow ◽  
Peripheral Vision ◽  
Night Vision ◽  
Flow Data ◽  
Relevant Research ◽  
Human Factors And Ergonomics ◽  
Research Findings ◽  
The Impact

This paper provides two demonstrations that highlight the importance of peripheral vision issues in system design. The first demonstration concerns the ability of the visual system to detect motion, while the second addresses the impact of reduction of visual field on the perception of optical flow data. Educators can use these demonstrations as the basis for discussions about the design implications for warning displays, attention gathering devices, optical flow, off-axis accidents, aging, attention, and night vision goggles. These demonstrations can be used at both the undergraduate and graduate levels. Relevant research findings are also discussed, and references for further exploration of the topics are provided.

Large Sections Peak Traffic Flow Subway Station Simulation Modeling

2014 ◽  
Vol 1065-1069 ◽  
pp. 3325-3328
Author(s):  
Xin Hua Zhang ◽  
Shu Hao Xu ◽  
Li Li Wu ◽  
Yin Hua Du ◽  
Zhi Jun Duan ◽  
...  
Keyword(s):  
Simulation Modeling ◽  
Flow Analysis ◽  
Local Area ◽  
Subway Station ◽  
Peak Time ◽  
Mathematical Software ◽  
Flow Data ◽  
Traffic Dynamics ◽  
Passenger Flow ◽  
Large Sections

This paper, three subway lines converge site meet a change to the peak time for passenger flow analysis, with the analysis of passenger flow field physical statistics, image processing technology to guide passenger flow data, analysis of local area biggest traffic speed and density, traffic dynamics theory, the application of mathematical software Matlab, establish mathematical model.

scholarly journals Evaluation of dynamic Parameters and developing calculation Methods of Parameters of pneumatic vibratory Mechanism of Bag Filters regeneration

2019 ◽  
Vol 97 ◽  
pp. 03019
Author(s):  
Viktor Sopov ◽  
Nikolay Emelianenko ◽  
Nikolay Balera ◽  
Yuri Zhuravlov
Keyword(s):  
Dynamic Parameters ◽  
Calculation Methods ◽  
Bag Filter ◽  
Filter System ◽  
Filter Regeneration ◽  
Research Findings

A scheme of membrane pneumatic mechanism of shaking bag filter for cleaning the air from dust is developed. The research findings of dynamics of air mechanic vibratory bag filter system are shown. The concept of revised methods for calculating main parameters of membrane pneumatic vibratory mechanism of the bag filter regeneration is developed.

scholarly journals ANALISIS FAKTOR FAKTOR YANG MEMPENGARUHI PERSISTENSI LABA PADA PERUSAHAAN MAKANAN DAN MINUMAN YANG TERDAFTAR DI BURSA EFEK INDONESIA PERIODE 2013 – 2017

2020 ◽  
Vol 1 (1) ◽  
pp. 16-31
Author(s):  
Elsa Lasrya ◽  
Oktavianiwiari Ningsih
Keyword(s):  
Cash Flow ◽  
Linear Regression Analysis ◽  
Sampling Technique ◽  
Multiple Linear Regression Analysis ◽  
Operating Cycle ◽  
Analysis Techniques ◽  
Independent Variables ◽  
Cash Flow Volatility ◽  
Operating Cycles ◽  
Debt Levels

The purpose of this study was to determine whether the independent variables, namely Cash Flow Volatility, Sales Volatility, Debt Levels and Operating Cycles affect the dependent variable, namely Profit Persistence. The sampling technique uses Purposive Sampling where 60 samples are used. This study uses multiple linear regression analysis techniques, F test and t test to determine its effect. The results of this study indicate that partially Cash Flow Volatility and Debt Levels affect Profit Persistence while the other two variables Sales Volatility and Operating Cycle have no effect on Profit Persistence. And simultaneously the four Independent variables influence the Profit Persistence.      

scholarly journals ABOUT THE POSSIBILITY OF APPLICATION OF ENERGY STORAGE IN IMPACT MACHINES

2021 ◽  
Vol 2 (4) ◽  
pp. 181-189
Author(s):  
Dmitriy O. Cheshchin ◽  
Vadim V. Plokhikh ◽  
Andrey K. Tkachuk
Keyword(s):  
Energy Storage ◽  
Simulation Modeling ◽  
Software Package ◽  
Operating Conditions ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Advantages And Disadvantages ◽  
Working Cycle ◽  
Robotic Drilling ◽  
Hydraulic Hammer

The article discusses the possibility of using energy storage devices in the form of pneumatic and mechanical springs for hydraulic percussion machines as part of robotic drilling systems. New design schemes are proposed that allow changing the energy parameters of the machine in accordance with the external operating conditions for the implementation of adaptive technological processes. Simulation modeling of the proposed schemes in the ITI SimulationX software package made it possible to determine the dynamic parameters and study the working cycle of the hydraulic hammer. The analysis of the results obtained showed the possibility of creating these types of machines, taking into account their advantages and disadvantages.

THE STUDY OF RUNNING AND MAINTENANCE PROCESS OF ELECTRIC LOCOMOTIVES WITH BIG DATA AND SIMULATION MODELING TOOLS

2017 ◽  
pp. 190-198
Author(s):  
Alexander Vorobiyov ◽  
Alexey Skrebkov ◽  
Andrey Lamkyn ◽  
Denis Bodrikov
Keyword(s):  
Simulation Model ◽  
Simulation Modeling ◽  
Optimization Problems ◽  
Time Budget ◽  
Practical Importance ◽  
Modeling Tools ◽  
Operating Cycle ◽  
Before And After ◽  
Distribution Laws ◽  
And Performance

Objective: To detect random components in the locomotive time budget and assess the efficiency of locomotive operation organization at a testing ground of the railroad. To optimize the system parameters of maintenance and operation of 2ES5K series electric locomotives, according to the factual data of their operation. To compare availability indices before and after the transition to service maintenance. Methods: The methods of probability theory, mathematical statistics, estimation and process-based simulation modeling were applied. Results: A list of typical for locomotive states was revealed in the process of its operation. The matrix of locomotive transitions between its states was built. Theoretical distribution laws and their numerical characteristics were determined for the components of locomotive time budget. It was established, that the types of distribution laws and their numerical characteristics differ before and after the transition to service maintenance. A discrete-event simulation model was developed in the programming environment of AnyLogic, which takes into account the dynamics of the system under examination with initial data variations for the calculation of operation and performance coefficients of locomotives. Practical importance: The simulation of 50 000 000 minutes (about 100 years) duration operating cycle of the locomotive made it possible to conclude, that the transition to service maintenance raises the efficiency of locomotive operation by way of increasing operation and performance coefficients. The designed simulation model may be applied for the solution of other optimization problems, for instance the determination of the required amount of operational fleet locomotives for the specified amount of traffic, the selection of rational sections for regular locomotives and locomotive crews.

scholarly journals An approach to automation of a rational choice of adaptive agricultural technologies

2020 ◽  
Vol 17 ◽  
pp. 00002
Author(s):  
Andrey Gostev ◽  
Alexey Pykhtin ◽  
Sergey Tarasov
Keyword(s):  
Rational Choice ◽  
Support System ◽  
Agricultural Technologies ◽  
Initial Information ◽  
Reference Information ◽  
Calculation Algorithms ◽  
Research Findings ◽  
Agricultural Producer ◽  
Adaptive Technologies ◽  
Effective Conditions

The research was conducted at the premises of the agricultural systems laboratory on the basis of research findings and analysis and generalization of modern scientific literature on a rational choice of adaptive technologies for cultivation of 10 crops (wheat, barley, rye, peas, millet, etc.) for different conditions in Russia. The most effective conditions for technologies application facilitating the efficient use of available resources were determined. Criteria, standards and requirements for the efficiency of the most important technological techniques of modern agricultural technologies were posed, as well as approaches to automation and an algorithm for their rational choice. The scheme and structure of the database of the agricultural producer support system for a rational choice of highly profitable adaptive technologies for leading grain crops cultivation were developed. The structure of the database of the decision support system is represented in three units: initial information, regulatory and reference information and calculation algorithms. The implementation of the developments into the production process opens up opportunities for the most efficient use of the existing soil and climate potential of the territories and material and technical resources in order to ensure highly profitable sustainable crops yields.

scholarly journals Informativeness And Predictability Of Cash Flows

2011 ◽  
Vol 14 (2) ◽  
pp. 21 ◽  
Author(s):  
Zhemin Wang ◽  
John Eichenseher
Keyword(s):  
Information Content ◽  
Cash Flow ◽  
Cash Flows ◽  
Capital Asset Pricing ◽  
Flow Data ◽  
Incremental Information ◽  
Research Findings ◽  
The Relationship ◽  
Future Cash Flows ◽  
Increasing Function

<span>This study investigates the relationship between the informativeness and the predictability of cash flow data. Predictability is defined as the ability of an accounting variable to predict future cash flows. Using a two-signal capital asset pricing model, this study predicts that the incremental informativeness of cash flows is an increasing function of its predictability and a decreasing function of the predictability of earnings. The empirical evidence is consistent with this prediction. This study contributes to the cash flow/earnings literature in that it identifies a context in which cash flow data possess significant incremental information content beyond that reflected in earnings. The research findings of this study also have methodological implications for other incremental information content studies. Specifically, it suggests that the informativeness of alternative information is an important factor in examining the incremental information of an accounting variable.</span>

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