scholarly journals PROCEDURE FOR SELECTION OF GAUGE COMPOSITION OF TRUCK TRACTORS USING INTEGRAL COEFFICIENT

2021 ◽  
pp. 88-95
Author(s):  
N. S. Zakharov ◽  
◽  
M. V. Nemkov ◽  
V. M. Nemkov ◽  
◽  
...  
Keyword(s):  
A Priori ◽  
Minimum Cost ◽  
Rolling Stock ◽  
Main Task ◽  
Integral Coefficient ◽  
Operational Parameters ◽  
Special Equipment ◽  
Oil Pipeline ◽  
The Cost

The article presents a solution to the problem of choosing the brand composition of truck tractors for the recruitment of transport divisions of oil pipeline enterprises. The main task of transport departments is to meet the needs of the main production. The equipment is operated under harsh conditions, as well as after the end of the regulatory period of use and needs to be updated quickly. Despite the timely maintenance and repair of freight rolling stock, frequent failures and increasing repair costs make further operation economically inefficient. When updating the fleet of vehicles, there is a problem in choosing the best in terms of the technical characteristics of the vehicle, but at the minimum cost. The purpose of the study is to optimize the costs of acquiring and operating special equipment of Transneft-Siberia JSC by developing a methodology for determining the rational grade composition of truck tractors. According to the a priori ranking method, the opinion of specialists and heads of transport divisions of Transneft-Siberia JSC was determined. For the study, the most popular brands of truck tractors of domestic and foreign production were chosen. As a result of the survey, the ranks of operational indicators of truck tractors and their weight are determined by the reverse ratio. The most signifi¬cant indicator as a result of a priori ranking is the cost of one unit of the vehicle. Integral coefficient components calculated relative to average value of each indicator are identified for each indicator. As a result of the study, it was revealed that for the renewal of the fleet of truck tractors, it is advisable to give preference mainly to foreign manufacturers. The integral factor, taking into account the weight of operational parameters, makes it possible to objectively evaluate the quality of truck tractors. The method of determining the integral coefficient is proposed, when using which it is possible to reduce the cost of acquiring and operating vehicles with an increase in the development of special equipment. Further areas of research are determination of integral factors for the fleet, including technological transport, as well as determination of the optimal nomenclature of special equipment for transport divisions of oil pipeline industry enterprises.

Determining the optimal load capacities units of forestry rolling stock

2015 ◽  
Vol 5 (4) ◽  
pp. 97-102
Author(s):  
Макеев ◽  
Viktor Makeev
Keyword(s):  
Load Capacity ◽  
Scientific Paper ◽  
Rolling Stock ◽  
Optimum Load ◽  
Optimal Load ◽  
Load Unit ◽  
Time Optimal ◽  
The Cost ◽  
Cost Of Transportation

Improving the efficiency of freight transport and industrial processes of forest complex is of great importance in the production activities of its business depends on many factors. The most important factor is the choice of the type operated by forestry staff and capacity of its units. In a scientific paper delivered and successfully solved the problem of determining the optimum load capacity of rolling stock unit forestry given distance transportation of timber cargo and average technical speed of vehicles in the transportation of timber cargo. At the same time optimal load unit Forestry rolling stock is determined by the conditions at the lowest cost to transport certain types of timber cargo and operational performance logging train (short log). The formula determining the cost of transportation of one ton (1 m3) timber cargo, which was the basis for the determination of the optimum load capacity of logging trucks. For greater clarity of how the optimal load on the logging train hauling timber (timber assortments) of the distance transportation, ways to perform loading and unloading operations and technical speed on the example of existing timber companies (Kulikovskii forestry) built a graph.

Determination of Hydraulic Permeability Based on the Measurements of Outflow

2015 ◽  
Vol 3 ◽  
pp. 105-116
Author(s):  
Jozef Kačur ◽  
Jozef Minár
Keyword(s):  
Unsaturated Flow ◽  
Dimensional Space ◽  
A Priori ◽  
Hydraulic Permeability ◽  
Infinite Dimensional ◽  
Tuning Parameters ◽  
Finite Dimensional ◽  
Partially Saturated Porous Media ◽  
The Cost

In this paper we present a method for the determination of the hydraulic permeability for flow in partially saturated porous media. The dependence of hydraulic permeability on effective saturation is not assumed to be a member of any specific finite dimensional class of functions (e.g. vanGenuchten-Mualem, Burdin-Mualem, Brook-Corey). Instead, an infinite dimensional space of functions with limited a priori assumptions (e.g. smoothness, monotonicity) is considered. Consequently, we face a more challenging problem compared to the finite-dimensional case, in which only few tuning parameters need to be determined. We consider the case of 1D unsaturated flow and assume that the data are collected at the outflow of the sample. The hydraulic permeability is determined in an iterative way. We minimize the cost functional reflecting the discrepancy between the measured and computed data. In doing so, we use the Gateaux differential to obtain the direction of the descent.

scholarly journals Mathematical model for optimizing the fleet of vehicles for performing land reclamation works

2021 ◽  
Vol 274 ◽  
pp. 11004
Author(s):  
Talgat Gabdullin ◽  
Marat Makhmutov
Keyword(s):  
Land Reclamation ◽  
Physical Nature ◽  
Operating Conditions ◽  
Special Equipment ◽  
Technological Complex ◽  
Reliability Characteristics ◽  
Fundamental Possibility ◽  
Group Form ◽  
The Cost

When choosing technical means for performing various technological processes and, in particular, for carrying out reclamation and cultural-technical works, two aspects should be taken into account: the fundamental possibility of using machines and the level of their reliability. But if the choice of technical means according to the fundamental possibility of use for performing a specific operation is sufficiently developed («Systems of machines», catalogs of special equipment have been developed), then the choice of means of repair and technical impact, depending on quantitative data and qualitative characteristics of reliability, is currently not fully studied. This is due to the lack of a sufficient database on malfunctions of the specified technical means and, as a consequence, the lack of reliable indicators of their reliability. Analysis of the data on the operation of technical means in land reclamation and construction organizations shows that due to the low reliability of machines, up to 40% of the cost of their work is the cost of maintenance and repair, while the share of time resources for downtime for technical reasons in the total fund of the working time reaches 40-50%. It should be noted that this is only part of the damage caused by the lack of reliability of the machines. Improving the methods of using machines led to the creation of mechanized complexes - a group form of machine work. Therefore, due to the widespread use of complex mechanization in land reclamation construction, the stop of one machine of a technological complex leads to a stop of the entire technological process. Thus, the determination of the reliability characteristics of the units of technological complexes, namely, the establishment of the physical nature, failures, the identification of the causes of their occurrence, as well as the determination of the need for repair and technical actions, will provide the necessary operational and economic performance indicators of the entire technological complex in specific operating conditions. In this regard, the issue of determining the optimal provision of repair and technical impacts on the units of technological complexes, taking into account their components, is an urgent task that requires separate research.

scholarly journals Full-scale testing of water intake pumps of pumping stations

2019 ◽  
Vol 97 ◽  
pp. 05017
Author(s):  
Khasanov Bakhriddin ◽  
Azimov Azam ◽  
Djurabekov Alisher
Keyword(s):  
Minimum Cost ◽  
Full Scale ◽  
Operational Performance ◽  
Hydraulic Calculation ◽  
Operational Parameters ◽  
Operating Modes ◽  
Pumping Stations ◽  
Pumping Units ◽  
The Cost ◽  
Full Scale Testing

This article is devoted to methods analysis and systems for maintaining the forebay operating modes of pumping stations, which the minimum cost of resources is provided. In modern conditions there is a need to implement measures and solutions to improve the operational performance of pumping stations, which would lead to a decrease in the cost of water supplied. Such activities include the development of methods and systems for the management and maintenance of stations operating modes, which provide the minimum cost of resources. Based on observations, the uneven operation of pumping units over time and as a result of imperfect design of advance cells, the design hydraulic indicators of flow and operational parameters of pumping stations deteriorate. The relevance hydraulic research of forebay regimes and water intakes indicated at a number of meetings on pumps quality. With the development of the recommended set of measures, it is possible to save water and energy resources. The purpose of the work was to conduct full-scale testing of forebay on a large pumping stations in operation, to develop a new design of forebay and its hydraulic calculation. During work performing, energy-hydraulic methods for determining the parameters of pumping units were used.

scholarly journals The Clustered Selected-Internal Steiner Tree Problem

2021 ◽  
pp. 1-12
Author(s):  
Yen Hung Chen
Keyword(s):  
Approximation Algorithm ◽  
Complete Graph ◽  
Steiner Tree ◽  
Minimum Cost ◽  
Performance Ratio ◽  
Steiner Tree Problem ◽  
The Cost

Given a complete graph [Formula: see text], with nonnegative edge costs, two subsets [Formula: see text] and [Formula: see text], a partition [Formula: see text] of [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] of [Formula: see text], [Formula: see text], a clustered Steiner tree is a tree [Formula: see text] of [Formula: see text] that spans all vertices in [Formula: see text] such that [Formula: see text] can be cut into [Formula: see text] subtrees [Formula: see text] by removing [Formula: see text] edges and each subtree [Formula: see text] spans all vertices in [Formula: see text], [Formula: see text]. The cost of a clustered Steiner tree is defined to be the sum of the costs of all its edges. A clustered selected-internal Steiner tree of [Formula: see text] is a clustered Steiner tree for [Formula: see text] if all vertices in [Formula: see text] are internal vertices of [Formula: see text]. The clustered selected-internal Steiner tree problem is concerned with the determination of a clustered selected-internal Steiner tree [Formula: see text] for [Formula: see text] and [Formula: see text] in [Formula: see text] with minimum cost. In this paper, we present the first known approximation algorithm with performance ratio [Formula: see text] for the clustered selected-internal Steiner tree problem, where [Formula: see text] is the best-known performance ratio for the Steiner tree problem.

scholarly journals PRACTICAL QUESTIONS FOR SILO BAGS GRAIN STORAGE TECHNOLOGY

2019 ◽  
Vol 19 (2) ◽  
pp. 10-16
Author(s):  
O. M. M. ZHELOBKOVA ◽  
G. N. STANKEVYCH
Keyword(s):  
Storage Period ◽  
Final Analysis ◽  
Grain Storage ◽  
Storage Site ◽  
Special Equipment ◽  
Storage Technology ◽  
Sanitary Condition ◽  
The Cost

In enterprises with limited capacities and a low-powered grain drying facilities there is a problem of economical and reliable storage of dry, wet and moist grains. One of the options for its successful solution is the application of grain storage technology in silo bags, tested in many enterprises, the basic principle of which is based on the self-preservation of grain under hermetic conditions in an environment of carbon dioxide. To implement this technology, it is necessary to determine the suitability of the batch of grain for loading in the silo bags on the basis of an operational analysis of the grain quality. After loading the grain, the silo bags are sealed, the grain mass is stored for a certain time and then unloaded. After many years of industrial testing of grain storage technology in silobags, recommendations have been developed that allow to ensure the quantity and proper quality of grain in the process of implementation of the technology. To do this, it is provided to carry out a whole range of activities - personnel training, the selection and preparation of a storage area for grain, deratization, the determination of the quality of grain at all stages and a safe shelf-life, depending on the condition of the grain, weighing of the grain; loading silo bags and placing them on the site; drawing of marks for identification of silobags; monitoring of the state of silo bags and grain and the restoration of the integrity of the silo bags throughout the storage period; accounting for grain in the silobags; processing of unconditioned grain; object protection, final analysis of the work performed, identify problems and ways to solve them. The storage site for grain in the silo bags must be cleaned of stubble and grass, sharp objects, grain residues, solid hardwood or the most densely packed soil (the clay surface is undesirable, as precipitation makes imposible laying and unloading of silobags), ensure no stagnation of water during rains and melting snow, provide the possibility of free movement of special equipment on the site. It must be deratized and fenced with a mesh with small openings, a height of at least 1 m and dipped. The analysis of the characteristics of three-layer silobags showed that to optimize the storage of dry grain, it is advisable to use the largest silobags of 90 m in length, since they have a larger capacity, there will be less time spent on dressing and sealing the silobags, saving space between the silo bags lying along one another , there will be less length of silobags to go for tying, as well as saving money on the cost of silobags, the cost of working time and fuel (decreases the number of transfers of special equipment). It is advisable to take into account the possibility of unloading the sleeve during one shift. At all stages (loading, storage, unloading) the determination of the quality of grain, monitoring the condition and restoring the integrity of the silo bags checking the sanitary condition of the site and the presence of baits should be carried out. Precautions should be observed, grain accounting, working with non-standard grain and final analysis of grain storage results should be carried out.

scholarly journals A Comprehensive Analysis of the Determinants of Swap Problem in the Supply Chain of the Petroleum Industry

2016 ◽  
Vol 5 (6) ◽  
pp. 108 ◽  
Author(s):  
Raed Al-Hussain ◽  
Reza Khorramshahgol
Keyword(s):  
Mathematical Modeling ◽  
Supply Chain ◽  
Petroleum Industry ◽  
Cost Savings ◽  
Comprehensive Analysis ◽  
Decision Makers ◽  
Operational Parameters ◽  
Supply Chain Costs ◽  
The Cost

Applying mathematical modeling to solve swap problems, specifically in the petroleum industry, have proven to help the decision makers to better determine what, where, and how much to swap in order to reduce supply chain (SC) costs and improve its surplus. However, for a better determination of the alternatives and a more profound evaluation of the tradeoffs among them, a comprehensive analysis of the results and a thorough investigation of their impact on the parties involved in swap are crucial. This research performs a detailed sensitivity analysis of the swap problem to examine the effect of different operational parameters on the cost savings realized along the supply chain of the organizations involved in swap. Findings of this study suggest that, if performed properly, swap can significantly reduce supply chain costs and may result in substantial savings, creating a win-win situation for all parties engaged in swap.

The Effect of Experimental Error on the Determination of the Optimum Metal-Cutting Conditions

1967 ◽  
Vol 89 (2) ◽  
pp. 315-322 ◽  
Author(s):  
D. S. Ermer ◽  
S. M. Wu
Keyword(s):  
Tool Life ◽  
Experimental Error ◽  
Metal Cutting ◽  
Cutting Speed ◽  
Minimum Cost ◽  
Minimax Principle ◽  
Life Testing ◽  
Cost Cutting ◽  
The Cost

The effect of experimental error in tool life testing on the determination of the minimum cost cutting speed (Vmin) is investigated by using the concept of statistical inference. It is shown that Vmin is not uniquely defined but lies within a probable interval of cutting speeds, and that this interval is affected by the cost and time parameters and the experimental range of feed in tool life testing. The selection of a specific speed from the Vmin confidence interval is illustrated by a decision rule based on the minimax principle.

scholarly journals Analisis Algoritma Apriori untuk Mendukung Strategi Promosi Perguruan Tinggi

2019 ◽  
Vol 1 (1) ◽  
pp. 49
Author(s):  
Haryo Kusumo ◽  
Eko Sediyono ◽  
Marwata Marwata
Keyword(s):  
Data Mining ◽  
A Priori ◽  
Promotion Strategy ◽  
Data Mining Techniques ◽  
Data Mining Algorithms ◽  
New Students ◽  
The Right ◽  
The Cost ◽  
Mining Algorithms

<p><em>Every company and organization that wants to survive needs to determine the effectiveness of the right promotion strategy. Determination of the right promotion strategy will be able to reduce the cost of promotion and achieve the right promotional goals. One way that can be done to determine the promotion strategy is to use data mining techniques. Data mining techniques used in this case are using the Apriori algorithm. A priori algorithm is one of the classic data mining algorithms. A priori algorithms are used so that computers can learn the rules of association, look for patterns of relationships between one or more items in a dataset. This study is conducted by observing several research variables that are often considered by universities in determining their promotion goals, namely school, region, and department. The results of this study are in the form of interesting patterns resulting from data mining which is important information to support the right promotion strategy in getting new students.</em></p>

Production Prime Cost As a Key Indicator of Production and Economic Activity of the Enterprise

2016 ◽  
Vol 5 (2) ◽  
pp. 4-12
Author(s):  
Каманина ◽  
Raisa Kamanina
Keyword(s):  
Production Efficiency ◽  
International Markets ◽  
Production Costs ◽  
Main Task ◽  
Present Stage ◽  
Prime Cost ◽  
Key Indicator ◽  
The Cost ◽  
Systematic Reduction

The main task of development of economy at the present stage is to fully improve the production efficiency and the sustainable occupation of positions of enterprises on the domestic and international markets. To withstand the intense competition and win the trust of customers, the company has to favorably stand out against the enterprises of the same type. It is well known that the consumer is interested in quality and price of products. The higher the quality and lower the price, the better and more profitable for the buyer. These indicators and enclosed in the cost of production. Prime cost is the basis of determination of product prices. Systematic reduction of production costs is one of the basic conditions of increase of efficiency of production. It has a direct impact on the amount of profit, level of profitability.

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