Technical Transactions. Iss. 5

Technical Transactions. Iss. 5

Type: Collection of magazine numbers
Release date

Collection items (14)


Methods of identifying the optimal positioning of different products within a warehouse with regard to minimising the costs associated with order picking

Lorenc, Augustyn, Szkoda, Maciej, Wyraz, Elżbieta
Article
2018
The most important factors conditioning the competitiveness of a warehouse are time and money. A randomly or improperly chosen storage process influences three types of costs: the movement of goods, waiting time, transportation costs. To increase the effectiveness of goods completion, i.e. to decrease processing time and cost, appropriately selected methods of product classification are used. In the article, the authors have done simulations of product classification for an ABC analysis, an ABC analysis together with a COI index, an ABC analysis together with an XYZ analysis, a COI index only, and the method of free product storage places. Simulations were made for two variants taking into account the need and there is no need to shifting products on the completion trolley during the whole completion process.

Continuous dependence of mild solutions on initial nonlocal data, of the nonlocal semilinear functional-differential evolution Cauchy problems of the first and second order

Bednarz, Adam, Byszewski, Ludwik
Article
2018
The aim of the paper is to prove two theorems on the continuous dependence of mild solutions, on initial nonlocal data, of the nonlocal semilinear functional-differential evolution Cauchy problems of the first and second orders. The paper is based on publications [1–10] and is a generalization of paper [5].

Excavation supported by diaphragm walls – inclinometric monitoring and numerical simulations

Grodecki, Michał, Toś, Cezary, Pomierny, Marcin
Article
2018
The results of the numerical simulation of deep excavation supported by a diaphragm walls are presented. Mohr-Coulomb and Hardening Soil models were used. The obtained horizontal displacements are compared with the results of the inclinometric monitoring and the observed discrepancies are discussed. Movement of the bottom of the wall – which is often neglected – is clearly observed both in the numerical simulations and in-situ measurements.

Evaluation of the practicability of the decomposition and equivalent substitution method in the analysis of reliability of the sewage system

Kubala, Marek, Królikowska, Jadwiga, Wawrentowicz, Dariusz
Article
2018
The work compares the accuracy of calculations of the reliability parameters of the sewerage network using the Decomposition and Equivalent Replacement (MDE) method, proposed by Yu. A. Yermolin and M.I. Alekseev [3], definitely simpler and less onerous in relation to the graph method. Comparing the results of calculations with both methods, applied to a simple network, one can come to the conclusion that the MDE calculations in simple cases give satisfactory accuracy. However, it would be necessary to check whether, as the complexity increases, this accuracy is still satisfactory.

A real time control system for balancing a ball on a platform with FPGA parallel implementation

Samotyy, Volodymyr, Telenyk, Sergii, Kravets, Petro, Shymkovych, Volodymyr, Posvistak, Taras
Article
2018
In this paper, a new PID-regulator based solution to the scientific and practical problem of increasing the accuracy of regulating the position of a ball on a platform in real time is proposed. A transfer function for balancing a ball on a platform is developed. A PID-regulator for balancing a ball on a platform is synthesized. A PID-regulator implementation on FPGA with parallel calculations is designed. An increased accuracy of regulating the position of a ball on a platform is approved by natural simulation.

A particle size distribution measurements of selected building materials using laser diffraction method

Prałat, Karol, Krymarys, Ewa
Article
2018
This article presents the results of experimental research to determine the size of powder graining in building materials, specifically, gypsums (Dolina Nidy, Pinczow) and adhesives (Atlas Sp. z o.o., Lodz, and Weber Saint-Gobain, Warsaw). A modern laser diffraction method for measuring the distribution of particle sizes with respect to their diameters was applied. During the experiment, three series of measurements were conducted for each material. Data relating to the graining of building materials is crucial because it is one of many aspects that directly affects the binding time and defines its potential applications in the construction industry.

The influence of rock mass disturbance on surface subsidence in urban areas

Majcherczyk, Tadeusz, Kryzia, Katarzyna, Niedbalski, Zbigniew
Article
2018
This paper presents an analysis of the parameters of surface deformation prediction theory carried out for a hard coal mine in the Upper Silesian Coal Basin. Two areas of the coal mine were used as the subject of this analysis – in these areas, underground mining with roof caving was carried out in similar geological conditions for various numbers of seams, and consequently, for various rock mass disturbance rates. In order to estimate the parameters of the surface deformation prediction theory, i.e. the exploitation coefficient and the angle of the main range of influences, geodesic measurements of subsidence along the observation lines were used. The study shows that rock mass disturbance affects the values of the Knothe theory parameters and the values of the surface deformation indicators. In the case of a larger number of selected seams, the determined value of the exploitation coefficient was larger than the determined value in the case of a less disturbed rock mass. Assuming inappropriate parameters for surface subsidence prediction may cause unexpected damage to surface objects.

Greenhouse systems in quasi-stationary and dynamic modelling

Grudzińska, Magdalena
Article
2018
The ISO 13790 standard presents two quasi-stationary calculation methods for including greenhouse systems in the evaluation of a building’s energy balance – a detailed and a simplified method. These adopt different assumptions with regard to solar gains in sunspace and in adjacent heated rooms; thus, the calculation results of the internal temperature of the sunspace and the energy demand in heated spaces may differ. This work presents the comparison of energy effects achieved due to the sunspace in an example living space, calculated by means of both quasi-stationary methods and more accurate dynamic simulations with an hour time step. Analysis of the results obtained by means of the described methods has enabled the identification of the advisable range of each of the calculation methodologies.

Place and people: landscape as a basis of development and preservation of cultural identity

Tovbych, Valeriy, Viazovska, Anna, Kryvoruchko, Yuriy
Article
2018
Processes of globalization and urbanization are the main factors of changes in our environment and social foundations. Culture, traditions, customs, mythology are tightly bonded with the geographical environment and the land itself, which also defined the way of economic activity and the lifestyle of inhabitants. Identity may become apparent through landscape in two principal ways. On the one hand, landscape can represent and identify the certain culture by means of its visual image. On the other hand, the manifestation of deep links of landscape and its inhabitants by means of reviling emotional, visual and semantic connections of man to a land, affords to strengthen people’s feeling of belonging, rooting and thus safety, which is exceptionally essential in our era of non-stable uncertain modernity.

Contemporary processes in historical urban greenery areas and the selection of materials – introduction to research

Bobek, Wojciech, Łakomy, Katarzyna
Article
2018
The paper will discuss urgent and topical problems that affect historical areas of urban open space. Its main goal will be the identification of phenomena which take place within it, and which mainly affect its natural tissue. The article will also contain such aspects as: an analysis of modern trends in revalorisation and the effects of its impact, an analysis of possible preventive measures that can be taken, as well as an evaluation of the influence of environmental factors on the condition of individual types of greenery.