Temat: technology characteristics - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Rozwój technologii palowania i problem ich wyboru
The development of piling technologies and the issue of their selection
Autorzy:: Sobotka, A.
Pająk, M.
Powiązania:: https://bibliotekanauki.pl/articles/162790.pdf
Data publikacji:: 2009
Wydawca:: Polski Związek Inżynierów i Techników Budownictwa
Tematy:: roboty fundamentowe
warunki hydrogeologiczne
palowanie
wybór technologii
kryteria doboru
charakterystyka technologii
foundation works
hydrogeological conditions
piling technology
technology selection
selection criteria
technology characteristics
Opis:: Dostęp do różnorodnych technologii pozwala na zastosowanie różnych rozwiązań projektowych i sprzyja wyborowi jak najkorzystniejszego rodzaju pali i technologii ich wykonania. Wybór rozwiązania powinien uwzględniać wiele różnych kryteriów: technicznych, ekonomicznych, środowiskowych i innych. Opisano kilka mało znanych technologii palowania oraz przedstawiono metodę wyboru rozwiązania projektowego (technologii palowania) za pomocą analizy wielokryterialnej na przykładzie wzmacniania posadowienia obiektu.
Access to varied technologies enables the application of different design solutions and facilitates the choice of the most advantageous pile type and technology for making them. The choice of solution should take into account many different criteria - technical, economic, environmental and other. This paper describes several less well-known piling technologies and presents a method for selecting a design solution (piling technology) using multiple-criteria analysis, based on an example involving reinforcement of the foundation of a structure.
Źródło:: Przegląd Budowlany; 2009, R. 80, nr 2, 2; 40-49
0033-2038
Pojawia się w:: Przegląd Budowlany
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Experimental Research Regarding the Rolling Technology of the Fe-Ni Alloys
Autorzy:: Bordei, Marian
Tudor, Beatrice
Powiązania:: https://bibliotekanauki.pl/articles/2106568.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: iron-nickel
rolling technology
mechanical characteristics
Opis:: In the domain of the equipment and apparatus construction, a permanent preoccupation worldwide is ensuring technical performances and high fiability in exploitation. The users’ requirement growth in this field led to producing materials with high characteristics such as iron-nickel alloys having a high nickel content with special magnetic, thermal, or elastic properties. The theoretical and experimental researches had the aim of obtaining cold rolled strip, thin (2.6 mm) and narrow (86 mm) from iron-nickel alloys with 41% Ni (low content of C: 0.02-0.04%; Fe: 58%; other elements: Mn, Si, Cu, Cr, Al: under 1%). Our own experiments aimed to establish an optimal cold rolling technology of hot rolled strips of iron-nickel alloys, in order to obtain cold rolled strips with superior mechanical and technological characteristics, strip profile according to current standards, including a finished product characterization.
Źródło:: Archives of Metallurgy and Materials; 2022, 67, 2; 501--505
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Study on particle movement characteristics in sandblast cylinder based on PIV technology
Autorzy:: Hui, Zhiquan
Wu, Feng
Duan, Haojie
Yang, Bo
Lin, Jinmei
Wang, Lian
Huang, Si
Powiązania:: https://bibliotekanauki.pl/articles/778390.pdf
Data publikacji:: 2020
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: PIV technology
Sandblast cylinder
Particles
Movement characteristics
Opis:: PIV technology was used to investigate the influence of the particles’ relevant parameters on the instantaneous movement characteristics in the sandblast cylinder under the circumstance of different particle sizes, different section heights and different stacking conditions. As the diameter increased, particles had a greater velocity and energy when approaching the wall, which would cause a serious abrasion. The influence of test selection factors on the particles’ radial velocity of particles was greater than that on axial velocity. The radial velocity and axial velocity on the surface of the cylindrical section were all reduced to a lower level when the particles approach the tank wall. When r > 0.3 R, the particle velocity maintained at a higher level, but then decreased slowly when r > 0.7 R. Therefore, the abrasion of the conical section of the sandblast cylinder when r > 0.3 R should be paid more attention to.
Źródło:: Polish Journal of Chemical Technology; 2020, 22, 3; 38-47
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Data structures in models of informatively-administrative architecture of coal-mining enterprises
Structury dannykh v modeljakh informacionno-upravlencheskikh arkhitektur ugledobyvajushhikh predprijatijj
Autorzy:: Shevchenko, S.
Powiązania:: https://bibliotekanauki.pl/articles/793675.pdf
Data publikacji:: 2013
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:: coal mining
information technology
database
data structure
technological characteristics
functional characteristics
monitoring
relationship
Źródło:: Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2013, 13, 3
1641-7739
Pojawia się w:: Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Study of Physical and Mechanical Properties of Post-Consumer Wood of Different Age
Autorzy:: Gayda, Serhiy
Kiyko, Orest
Powiązania:: https://bibliotekanauki.pl/articles/27323548.pdf
Data publikacji:: 2023
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:: post-consumer wood
physical properties
mechanical properties
characteristics
strength
recycling
technology
use
Opis:: It should be noted that there is currently a problem with wood resources in the woodworking industry. A potential, unused wood reserve is post-consumer wood (PCW). The problem with the quality of this wood resource has not been fully resolved since there is no regulatory database. In fact, there is a lack of appropriate regulatory documents, which makes it impossible to describe to a full extent the physical and mechanical properties of PCW of common wood species of different ages as a source of additional raw materials for various woodworking technologies. Proceeding from the goal, the task of the study is to describe the physical and mechanical properties of postconsumer wood using the example of fir wood, which for a long period of time has been used to create furniture and joinery products. The task is also to identify patterns of change in the indicators of this resource with age – an expired service life or suitability. In order to use PCW in woodworking and to fill the scientific base with physical and mechanical indicators of fir wood of different ages with an expired product service life, the following characteristics were investigated: static hardness, swelling, coefficients of swelling, the value of transverse anisotropy, density, static bending strength, splitting strength along the fibers, modulus of elasticity in compression, and the modulus of elasticity in static bending. The characteristics of PCW of the widespread fir species in the range of use from 0 to 20 years were explored, with intermediate control over the properties every 5 years. The dynamics of the physical and mechanical indicators of fir PCW were revealed and it was found that in the course of operation time in various conditions they change, mainly decreasingly: static hardness by 9.2-9.6%; the value of transverse anisotropy by 30-32%; strength: static bending strength by 3.4-7.95%, splitting strength by 4.49-8.67%; modulus of elasticity: in compression by 3.89-4.08%, in bending by 2.75-6.64%. The main causes of changes in the properties of PCW with age: natural: weathering, partial internal rot, insect damage, other biological effects; mechanical: splitting, scratches, small holes from means of fastening and other defects due to use; operational: the influence of power and dynamic loads, the influence of surface finishing agents and other factors on the structural elements of wood products. A summary table was compiled for the selection of indicators of the physical and mechanical properties of fir PCW of different ages. When knowing the indicators and dynamics of the physical and mechanical properties of PCW with age, it can be recommended for manufacturing structural materials – blockboards and furniture panels.
Źródło:: Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2023, 66, 212; Art. no. 177453
1644-3985
Pojawia się w:: Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The investigation of properties of blockboards made of post-consumer wood
Autorzy:: Gayda, Serhiy
Kiyko, Orest
Powiązania:: https://bibliotekanauki.pl/articles/2010870.pdf
Data publikacji:: 2020
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:: post-consumer wood
blockboards
mathematical model
physical properties
mechanical properties
characteristics
strength
recycling
technology
use
Opis:: Today in woodworking, there are problems with the use of wood waste and the accumulation of involved wood as an additional and not fully used resource. The problem has not been completely solved, as there is no scientific basis and practical recommendations for efficient production processes with predicting the properties of products made from Post-Consumer Wood (PCW), in particular in the production of blockboards (BB). The objective of the studies is to substantiate and develop a scientific and technical basis for resource-saving and environmentally friendly technologies, to establish the influence patterns of PCW properties on the mechanical characteristics of the products obtained, to develop operating parameters and to formulate practical recommendations, confirmed by the results of experimental studies. The studies have proved the expediency of using PCW in technological processes of woodworking, in particular in the production of construction materials - blockboards with predicted characteristics. In order to rationally use raw materials for the manufacture of conventional blockboards made from Post-Consumer Wood (PCW-BB), new designs of a conventional PCW blockboard with a thickness of 22 mm and with a unified strip width of 16, 32, 48, and 64 mm, the strips are glued ones, 3 mm thick, and faced with plywood on both sides. The authors of the article found that in order to ensure improved operating characteristics of the blockboards, it is important to lay radial, semi-radial and tangential strips in structures with the ratio of width to thickness of the cross-sections of the strips - rationally and efficiently - 1:1, 2:1, 3:1. Substantiation on this basis of new designs of PCW blockboards makes it possible to reveal shortcomings of these products at the conceptual stage of the project and correct them before manufacturing taking into account the specified technical conditions and reducing costs at the development stage. Mathematical models for predicting the main characteristics of conventional PCW blockboards (PCW-BB) have been constructed, which made it possible to determine the indexes of the bending strength of the BB across the strips, σBB, and the shear strength of the BB along the glue line, τВВ. The coefficients of approximation of mathematical dependencies for predicting the strength of PCW-BBs, the strips of which were made of fir wood, were calculated, which would allow for the selection of rational designs of blockboards with appropriate characteristics. It has been established that the developed mathematical models make it possible to predict the characteristics of the PCW-BB depending on the cross-sectional dimensions of the strips, the angle of the annual rings slope to the blockboard face and the age of the PCW, and, on this basis, to propose improved designs of these blockboards for the technological processes of woodworking. The influence patterns of the properties of structural elements on the indicators of conventional PCW-BB (500 × 500 × 22 mm) were experimentally established. It was found that an increase in the width of the strips leads to a decrease in the strength indexes (by 29-37%); an increase in the angle of the annual rings slope to the BB face leads to an increase in static bending strength (by 31-33%) but to a decrease in shear strength (by 4-7%); an increase in the age of the PCW leads to a decrease in strength indexes (by 3-8%). It was found that the physical and mechanical parameters of the experimental PCW-BBs with a strip cross-sections of 1:1, 2:1, 3:1 meet the requirements of the standard (larger values: for static bending of a rate of 15 MPa and for shearing at a rate of 1 MPa), and for the 4:1 cross- -section, they partially had lower indexes by 2-3%. To ensure the strength of the developed structures of the PCW-BBs, it is recommended to use the 3:1 ratio of the sides in the cross-section of the strips, and the slope of the annual rings to the blockboard face must be at least 45o. It was found that the deviation of the values obtained by mathematical models in determining the strength in static bending and shearing in comparison with the experimental ones did not exceed 8% and 10%, respectively.
Źródło:: Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2020, 63, 206; 77-102
1644-3985
Pojawia się w:: Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The improvement of environmental characteristics of the combined cycle power plant by the implementation of the carbon capture installation
Autorzy:: Kotowicz, J.
Brzęczek, M.
Job, M.
Powiązania:: https://bibliotekanauki.pl/articles/134906.pdf
Data publikacji:: 2015
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: combined cycle power plant
post-combustion technology
chemical absorption
carbon capture installation
power plant efficiency
ecological characteristics
Opis:: The paper describes a combined cycle power plant with carbon capture installation in a post-combustion technology. Carbon dioxide is separated from flue gas by using a chemical absorption method with monoethanolamine (MEA) as a sorbent. Separated carbon dioxide is compressed in order to prepare for transportation to the storage place. This paper identifies the electric efficiencies and other characteristic parameters of power plants before and after implementation of CO2 capture installation, as well as the power plant efficiency drop, and the improvement of ecological characteristics related to the implementation of this installation. The implementation of the installation described herein is associated with the efficiency loss caused by the auxiliary power for additional installations. The CO2 separation installation is powered by heat energy required for reclaiming the sorbent. This energy is taken in the form of steam extracted from the steam cycle, thus reducing the steam turbine power output, while the CO2 compression installation is powered by electric energy.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 44 (116); 19-24
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Hybrid vehicle diagnostics
Autorzy:: Prajwowski, K.
Osipowicz, T.
Powiązania:: https://bibliotekanauki.pl/articles/247375.pdf
Data publikacji:: 2017
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: hybrid vehicle
diagnostics
sensor
actuator technology
oscilloscope signal characteristics
pojazd hybrydowy
diagnostyka
czujnik
technologia napędu
sygnał oscyloskopu
charakterystyka
Opis:: The history of hybrid vehicles has started between the 19th and the 20th century because then the first project of a hybrid vehicle was constructed. The first man who manufactured a front hub mounted electric propulsion connected with a generator powered by a spark ignition engine was Ferdinand Porsche. This vehicle was called the Lohner- -Porsche Electromobile. The first mass-produced hybrid vehicle was the first generation Toyota Prius. The model premiere was in 1996 and the production started one year later. The vehicle was equipped with a 1.5 dcm 58 hp spark ignition engine and with the added electric propulsion. It generated 40 mechanical hp. Since 2000, a 72 hp spark ignition engine and a 44 hp electric generator were mounted. Fuel consumption of this model was 5 litres per 100 km. In the early 2000s, 95% hybrid vehicles were the Toyota Prius. The biggest competitor to the Toyota Prius was the Honda Insight. Lexus and Mercedes started manufacturing hybrid vehicles few years later. The most popular car brands that sell hybrid vehicles are Toyota and Lexus from Toyota Motor Corporation. This article describes an example of diagnostic possibilities for the hybrid vehicle system. The construction of vehicle models that use two propulsion systems (spark ignition engine and electric generator) results in the development and increase in control system devices. The measurements were made using various diagnostic devices, e.g. a diagnostic scanner, mustimeter, megohm-meter and oscilloscope. The reading of fault codes is not enough so it is necessary to use a mustimeter or a megohm-meter to examine the signal characteristics, which is presented in this article.
Źródło:: Journal of KONES; 2017, 24, 1; 309-315
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Simulation of the power unit of the automatic electrohydraulic drive with volume regulation
Мodelirovanie silovojj chasti avtomaticheskogo ehlektrogidravlicheskogo privoda s obemnym regulirovaniem
Autorzy:: Sokolov, V.
Azarenko, N.
Sokolova, Y.
Powiązania:: https://bibliotekanauki.pl/articles/793450.pdf
Data publikacji:: 2012
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:: pump
electrohydraulic drive
volume regulation
dynamic characteristics
signal transmission
block diagram
transfer function
plastic moulding machine
mathematical model
modern technology
Źródło:: Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 4
1641-7739
Pojawia się w:: Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Operating properties of composite antifriction materials on the base of aluminium alloys wastes for printing equipment
Autorzy:: Roik, T.
Gavrish, A.
Kyrychok, P.
Vitsuk, Y.
Dorfman, I.
Powiązania:: https://bibliotekanauki.pl/articles/115586.pdf
Data publikacji:: 2013
Wydawca:: Fundacja na Rzecz Młodych Naukowców
Tematy:: powder metal grinding wastes
aluminium alloy AK12MMgN
making technology
microstructure
tribological characteristics
physical-mechanical properties
friction parts for polygraphic knife-machines
Opis:: The questions of using materials for friction units, first of all, the antifriction materials in particular on the aluminium alloy-based metal matrix take a central place in general problem of increasing the polygraph knife-machines quality. Endurance of such equipment determines a level of printing output quality. This paper summarizes the recent developments of aluminium alloy AK12MMgN industrial grinding wastes-based usage for new antifriction materials and knowledge about their manufacturing technology; specific examples will be given. Research results of new composite material physical, mechanical and tribological properties in comparison with cast alloy have been presented. The principle possibility to use the valuable industrial grinding wastes of ferrous and color metals for manufacturing of an effective parts of polygraph machines was shown.
Źródło:: Challenges of Modern Technology; 2013, 4, 3; 23-27
2082-2863
2353-4419
Pojawia się w:: Challenges of Modern Technology
Dostawca treści:: Biblioteka Nauki

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