scholarly journals Preliminary identification and evaluation of parameters affecting the capacity of the operator-earthmoving machine system

2013 ◽  
Vol 12 (1) ◽  
pp. 053-060
Author(s):  
Elżbieta Radziszewska-Zielina ◽  
Anna Sobotka ◽  
Edyta Plebankiewicz ◽  
Krzysztof Zima
Keyword(s):  
Current System ◽  
Weather Conditions ◽  
Technical Condition ◽  
Health Condition ◽  
Factors Affecting ◽  
Operator Experience ◽  
Technical Parameters ◽  
Machine System ◽  
Preliminary Identification ◽  
State Of Affairs

Without reliable data on the time of work of construction machines it is impossible to calculate the cost of the investment or the time limit for its implementation. Machine capacity is affected by many factors resulting from both the technical capabilities of a machine (e.g. the engine and bucket capacity) and work environment (e.g. soil loosening and weather conditions). Capacity is also influenced by factors affecting the operator (e.g. health condition, stress, fatigue). Therefore, it is appropriate to use the concept of the operator-machine system. The current system for the standards of machine working time collected in catalogues of capital expenditures is outdated (a lack of modern materials, technology and equipment currently used). It does not take into account all possible weather conditions, labour conditions and soil and water conditions. The result of this state of affairs may be overestimation or underestimation of an investment. On the basis of the conducted research it may be concluded that the greatest impact on the capacity of the operator-earthmoving machine system is exerted by parameters associated with the psychophysical condition of the operator (experience, fatigue, health and motivation of the operator) and the technical parameters of the machine (technical condition and theoretical technical capacity). Weather conditions, particularly air humidity, affect the performance to the smallest extent.

scholarly journals The Fundamental Approach of the Digital Twin Application in Railway Turnouts with Innovative Monitoring of Weather Conditions

Sensors ◽  
2021 ◽  
Vol 21 (17) ◽  
pp. 5757
Author(s):  
Arkadiusz Kampczyk ◽  
Katarzyna Dybeł
Keyword(s):  
Weather Conditions ◽  
Fixed Time ◽  
Technical Condition ◽  
Transport Infrastructure ◽  
Atmospheric Conditions ◽  
Factors Affecting ◽  
Railway Traffic ◽  
Digital Twins ◽  
The Status ◽  
Innovative Solution

Improving railway safety depends heavily on the reliability of railway turnouts. The realization of effective, reliable and continuous observations for the spatial analysis and evaluation of the technical condition of railway turnouts is one of the factors affecting safety in railway traffic. The mode and scope of monitoring changes in geometric parameters of railway turnouts with associated indicators needs improvement. The application of digital twins to railway turnouts requires the inclusion of fundamental data indicating their condition along with innovative monitoring of weather conditions. This paper presents an innovative solution for monitoring the status of temperature and other atmospheric conditions. A UbiBot WS1 WIFI wireless temperature logger was used, with an external DS18B20 temperature sensor integrated into an S49 (49E1)-type rail as Tszyn WS1 WIFI. Measurements were made between January and May (winter/spring) at fixed time intervals and at the same measurement point. The aim of the research is to present elements of a fundamental approach of applying digital twins to railway turnouts requiring the consideration and demonstration of rail temperature conditions as a component in the data acquisition of railway turnout condition data and other constituent atmospheric conditions through an innovative solution. The research showed that the presented innovative solution is an effective support for the application of digital twins to railway turnouts and ongoing surveying and diagnostic work of other elements of rail transport infrastructure. The applicability of the TgCWRII second temperature difference indicator in the monitoring of railway turnouts was also confirmed.

THE TECHNICAL CONDITION OF THE SURVEYED HYDRAULIC UNITS IN THE MOSCOW REGION AND THE CLASSIFICATION FEATURES OF THEIR RESERVOIRS

2021 ◽  
pp. 69-79
Author(s):  
V. V. GRITSAN ◽  
Keyword(s):  
Technical Condition ◽  
Moscow Region ◽  
Risk Level ◽  
Ecological Framework ◽  
Safety Level ◽  
Repair Work ◽  
Hydraulic Unit ◽  
Technical Parameters ◽  
Characteristic Features ◽  
The Cost

The article presents the results of surveys of 311 class IV hydraulic structures carried out in 2016-2020 in the Moscow region. All the reservoirs of the surveyed hydraulic units were classified according to their characteristic features, the technical condition of culverts and dams was assessed, there was established the safety level of both separate structures and hydraulic units as a whole. During the surveys, the technical parameters of the surveyed structures were established, the state of each structure and the hydraulic unit as a whole was assessed, a possibility of their accident and a risk level for the downstream areas were considered. At the same time, recommendations were developed for the elimination of serious damage and, with the help of an examination, the amount of the cost of the necessary repair work was determined. The paper also assesses the issues of the ecological state of the areas where the hydraulic units are located and the hydraulic units themselves as blocks of the ecological framework of the territories.

scholarly journals Datum ranking and analysis of factors affecting tire wear

2020 ◽  
Vol 1 (1) ◽  
pp. 164-169
Author(s):  
El’dar Kamil’evich ABDULAEV ◽  
Keyword(s):  
Production Management ◽  
Economic Effect ◽  
Technical Condition ◽  
Transport Costs ◽  
Factors Affecting ◽  
Field Development ◽  
Dump Trucks ◽  
Tire Production ◽  
Main Factors ◽  
And Performance

Relevance of the work. The operational efficiency and technical condition of mining vehicles to a large extent depend on the service life and performance characteristics of tires. The most important technological process that determines the effectiveness of field development is the transportation of rock mass. The share of motor transport costs in the total cost and production by open method at Russian mining enterprises is significant, and reaches 70% as the depth of open pits (cuts) increases. At the same time, the actual productivity of mining trucks is much lower than their technical and technological capabilities, and this difference is up to 2.5 times or more for various brands of vehicles, including imported ones. Today, both consumers and manufacturers of large tires are interested in the most efficient tire production management. Purpose of the work: consideration of the main factors affecting tyre life, as well as datum ranking of these factors to determine the degree of significance of each factor. Methodology of research. The systematic approach was used including datum ranking method, some analytical, computational methods and generalization. Results. The ranking was carried out by three independent groups of experts on a number of proposed factors. The main factors in each group were identified and the degree of agreement between the opinions of the interviewed specialists was evaluated. The general opinion of various expert groups on the significance and ranking of factors affecting the integrity of giant tires is confirmed. Conclusions. Datum ranking and analysis of factors affecting the wear of giant tires of mining dump trucks significantly affect the optimization of machine operation and, with appropriate adjustments, can give a positive economic effect.

scholarly journals Diagnosis of technical parameters of amplifiers used in sound warning systems

2017 ◽  
Vol 66 (3) ◽  
pp. 99-110
Author(s):  
Jacek Paś
Keyword(s):  
Power Amplifiers ◽  
Warning System ◽  
Fire Detection ◽  
Technical Condition ◽  
Essential Elements ◽  
Technical Parameters ◽  
Alarm Systems ◽  
Life Threatening ◽  
Evacuation Routes ◽  
Working Parameters

The article presents a method of diagnosing the technical conditions of a power amplifier which is used in a sound warning system (SWS). Fire Alarm Systems (FAS) and SWSs are electronic safety systems designed to protect life and health. The FAS is used for effective fire detection, while life-threatening SWSs provide efficient communication of emergency information and evacuation routes via voice. The article presents the problem of diagnosing the technical condition of power amplifiers, which are the essential elements of SWSs. Power amplifiers provide a certain level of undistorted audio (alarm messages) to the speaker set that is arranged in a building supervised by FAS. Keywords: amplifier, audible warning system, working parameters

scholarly journals FACTORS INFLUENCING THE FEE FOR USE OF THE RAILWAY INFRASTRUCTURE

2017 ◽  
Vol 11 ◽  
pp. 49
Author(s):  
Petr Novák ◽  
Václav Cempírek
Keyword(s):  
Current System ◽  
The European Union ◽  
Technical Parameters ◽  
Production Factors ◽  
International Trends ◽  
Academic Paper ◽  
Railway Infrastructure ◽  
Market Situation ◽  
Current Production ◽  
Legislative Changes

It is necessary to update the current system of levying charges for railway infrastructure to reflect the current market situation, to take into account the new transport strategy established by the European Union, and to reflect legislative changes in relation to Directive 2012/34/EU on creating a single European railway area. International trends aim to categorize tracks according to technical parameters and parameters based on shipment time, as well as many others. The existence of different opinions on the amount and way to charge fees for railway infrastructure have led the authors of this academic paper to create a plan for a system of charges to be derived from the current production factors as well as from a number of specific new factors used in countries neighboring the Czech Republic.

scholarly journals Algorithms and models of power losses in circuit breakers installed in networks

Vestnik MGTU ◽  
2020 ◽  
Vol 23 (4) ◽  
pp. 345-353
Author(s):  
E. I. Gracheva ◽  
A. N. Gorlov ◽  
A. N. Alimova
Keyword(s):  
Power Supply ◽  
Low Voltage ◽  
Technical Condition ◽  
Active Power ◽  
Operating Conditions ◽  
Public Utility ◽  
Electrical Networks ◽  
Power Losses ◽  
Circuit Breakers ◽  
Technical Parameters

Determination of the main characteristics of the topology and technical condition of equipment underoperating conditions is necessary for analyzing and assessing power and electricity losses in intrashoplow-voltage industrial power supply networks. A comparative analysis of the technical characteristicsof automatic circuit breakers VA57-31 (KEAZ), NSX100 TM-D (Schneider Electric), DPX3 160 (Legrand), Tmax XT1 TMD (ABB) has shown that the main technical parameters of the machines are close in their values. At that it has been found out that automatic switches of the BA57-31 series have the lowest value of power losses per pole (7.5 W), whereas the automatic switches of the Tmax XT1 TMD series have the highest value (10 W). Thus, under the operating conditions of the equipment, the lowest value of power and electricity losses is characteristic of low-voltage electrical networks with installed circuit breakers of the BA57-31 series, and the highest value of losses is noted in in-shop systems with installed circuit breakers Tmax XT1 TMD. Using catalog data, the dependences of active power losses in circuit breakers on rated currents have been established; the algorithms have been developed and the obtained dependences have been modeled using approximating functions. The standard deviation of the compiled approximating functions has been calculated. Analytical expressions of the dynamics of power losses per pole have been determined as a function of the rated current. The graphical dependences of the investigated parameters of low-voltage equipment have been presented. The developed models are recommended to be used to increase the reliability of the assessment and refinement of the amount of active power and electricity losses in low-voltage electrical networks of industrial power supply systems, agrotechnical complexes, and enterprises of the public utility sector.

Construction Technology Research on Super Glass Curtain Wall of the Henan Art Center

2012 ◽  
Vol 170-173 ◽  
pp. 3212-3215
Author(s):  
Ya Nan Fu ◽  
Hai Tao Mao
Keyword(s):  
Wall Structure ◽  
Tension Stress ◽  
Construction Technology ◽  
Curtain Wall ◽  
Glass Wall ◽  
Factors Affecting ◽  
Structural Wall ◽  
Technical Parameters ◽  
Working Principle ◽  
Glass Curtain Wall

Henan Art Center has a new curtain wall structure - the structure cable net glass wall. Because of the cable net structure for glass curtain wall construction and design difficulties, the design of curtain wall performance to deepen the main points of cable net structural wall of the working principle, design connections, cable net structural wall of the cable construction steps, cable pre-stressing and tension when the technical parameters and under the glass curtain wall materials and installation was introduced. And the main factors affecting the performance curtain wall and the cable tension when the ambient temperature and the tension stress was studied. The results showed that the construction program was optimize and construction quality and safety was ensure.

Post-fire ephemerals and spinifex-fuelled fires: a decision model for bilby habitat management in the Tanami Desert, Australia

2007 ◽  
Vol 16 (6) ◽  
pp. 741 ◽  
Author(s):  
Richard Southgate ◽  
Susan Carthew
Keyword(s):  
Habitat Suitability ◽  
Decision Model ◽  
Habitat Management ◽  
Fire History ◽  
Spatial Databases ◽  
Ground Cover ◽  
Weather Conditions ◽  
Early Summer ◽  
Annual Rainfall ◽  
Factors Affecting

Seed from post-fire ephemeral plants like Yakirra australiense can form an important component of the diet of the bilby, a threatened arid-dwelling bandicoot. An investigation was conducted to determine the factors affecting the production of Yakirra and fire reoccurrence in the Tanami Desert. A simple decision model was produced to assist managers decide where and when to burn and what to expect regarding Yakirra australiense growth following fire and rainfall. The information used in the model may be derived from existing spatial databases that document rainfall and fire history and could be used to map broad-scale temporal change in total vegetation cover and components of habitat suitability for the bilby. The season and magnitude of rainfall and time-since-fire were the most important variables in the production of Yakirra seed. Rainfall >300 mm within a 2-month period of intense-complete burns could result in >5% Yakirra cover, and >100 mm was required for >1% cover. Negligible Yakirra cover occurred in adjacent long-unburnt plots. Total ground cover and spinifex cover varied substantially in relation to mean annual rainfall, but not in relation to substrate type. Long-unburnt spinifex cover was mostly too sparse to carry a fire in the southern part of the Tanami and the growth of non-spinifex vegetation would be necessary to boost fuel loads sufficiently to carry a fire. Generally, more than 41% cover was required to carry a fire but this was also dependent on weather conditions. Managers should aim to burn in late spring or early summer to improve Yakirra production. Fire management to enhance habitat suitability for the bilby would be of most benefit in the northern part of the Tanami Desert where growth rate of vegetation is greater and there is little existing fire age heterogeneity.

scholarly journals 14C AMS Measurements of <100 μG Samples with a High-Current System

Radiocarbon ◽  
1997 ◽  
Vol 40 (1) ◽  
pp. 247-253 ◽  
Author(s):  
Karl F. Von Reden ◽  
Ann P. McNichol ◽  
Ann Pearson ◽  
Robert J. Schneider
Keyword(s):  
Current System ◽  
Ion Beam ◽  
Beam Current ◽  
Small Sample ◽  
Small Samples ◽  
High Current ◽  
Beam Optics ◽  
Woods Hole Oceanographic Institution ◽  
Factors Affecting ◽  
The Past

The NOSAMS facility at Woods Hole Oceanographic Institution has started to develop and apply techniques for measuring very small samples on a standard Tandetron accelerator mass spectrometry (AMS) system with high-current hemispherical Cs sputter ion sources. Over the past year, results on samples ranging from 7 to 160 μg C showed both the feasibility of such analyses and the present limitations on reducing the size of solid carbon samples. One of the main factors affecting the AMS results is the dependence of a number of the beam optics parameters on the extracted ion beam current. The extracted currents range from 0.5 to 10 μA of 12C− for the sample sizes given above. We here discuss the setup of the AMS system and methods for reliable small-sample measurements and give the AMS-related limits to sample size and the measurement uncertainties.

scholarly journals Construction of ropeways in Slovakia in terms of pre-construction design using helicopters (case study)

2019 ◽  
Vol 263 ◽  
pp. 01002
Author(s):  
Andrej Bisták ◽  
Zdenka Hulínová
Keyword(s):  
Construction Industry ◽  
Transport Mechanism ◽  
Simulation Models ◽  
Weather Conditions ◽  
Positive Experience ◽  
Site Location ◽  
Factors Affecting ◽  
Construction Design ◽  
History Of

Ropeways usually provide access to locations inaccessible to other means of transport. Due to this fact, the construction of ropeways is extraordinarily taxing in terms of both, technology and logistics. The site location is often in terrain difficult to access, which often precludes deployment of common construction mechanisms in ropeway construction. In such case, it is advisable to deploy a transport mechanism independent of the terrain – a helicopter. Functioning as “flying cranes“, the helicopters have been used in construction industry in Slovakia for six decades now. Having amassed positive experience, even the “conventional“ construction industry of the time, especially its ropeway transport segment, started to use the benefits of helicopters, with helicopter deployment subsequently gaining ground and becoming the mainstream technological procedure. Ropeway construction can hardly be feasible without them even nowadays. Throughout the history of helicopter deployment in construction industry, a constant search of improving the efficiency of their work has been under way, necessitated by the helicopter’s sensitivitiy to weather conditions and work procedures alike. The paper presents an analysis of the factors affecting helicopter operation together with a proposed methodology of modeling their work in simulation models and the benefits of such approach.

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