Temat: conversion rate - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Flue gas desulfurization by mechanically and thermally activated sodium bicarbonate
Autorzy:: Walawska, B.
Szymanek, A.
Pajdak, A.
Nowak, M.
Powiązania:: https://bibliotekanauki.pl/articles/778987.pdf
Data publikacji:: 2014
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: flue gas desulfurization
sodium bicarbonate
surface area
conversion rate
Opis:: This paper presents the results of study on structural parameters (particle size, surface area, pore volume) and the sorption ability of mechanically and thermally activated sodium bicarbonate. The sorption ability of the modified sorbent was evaluated by: partial and overall SO₂ removal efficiency, conversion rate, normalized stoichiometric ratio (NSR). Sodium bicarbonate was mechanically activated by various grinding techniques, using three types of mills: fluid bed opposed jet mill, fine impact mill and electromagnetic mill, differing in grinding technology. Grounded sorbent was thermally activated, what caused a signifi cant development of surface area. During the studiem of SO₂ sorption, a model gas with a temperature of 300°C, of composition: sulfur dioxide at a concentrationof 6292 mg/m_n³ oxygen, carbon dioxide and nitrogen as a carrier gas, was used. The Best development of surface area and the highest SO₂ removal efficiency was obtained for the sorbent treated by electromagnetic grinding, with simultaneous high conversion rate.
Źródło:: Polish Journal of Chemical Technology; 2014, 16, 3; 56-62
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Inverse aspects of the three-way catalytic converter operation in the spark ignition engine
Autorzy:: Żmudka, Z.
Postrzednik, S.
Powiązania:: https://bibliotekanauki.pl/articles/242021.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: catalytic converter
conversion rate
flow resistance
local resistance number
friction number
Opis:: There are two sides of the catalyst operation: favourable and adverse. The positive side can be expressed by a conversion rate of harmful substances which is the principal parameter of catalyst work in respect of ecology. However, resistance of exhaust gas flow through the catalytic converter is also an essential problem. This is just the negative, adverse side of the converter operation. The catalytic converter can be treated as a local or linear resistance element of exhaust system. The first model, in which flow resistance generated by a catalyst is treated as local resistance, is more simplified. It is especially useful in case, when detailed constructional data of converter are unknown and the analysis of flow resistances in exhaust system is necessary. The basic measured quantity of flow resistance is pressure drop of exhaust gas within the catalyst. Next, on the basis of taken measurements also resistance number for the tested catalyst is calculated and analysed. Resistance number of the converter is calculated using Darcy model. In the second case, exhaust gas flow resistance through catalyst is treated as linear resistance with energy dissipation (linear frictional resistance) distributed linearly along way of exhaust gas flow. Friction number for the tested converter is calculated and analysed. The problem has been illustrated by the results of experimental researches of the three-way catalytic converter installed in the exhaust system of the spark ignition engine.
Źródło:: Journal of KONES; 2011, 18, 2; 509-516
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Sensitivity analysis of key customers and revenue-oriented admission control and scheduling algorithm
Autorzy:: Suchacka, G.
Borzemski, L.
Powiązania:: https://bibliotekanauki.pl/articles/407099.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: quality of Web service
QoWS
web server
e-commerce
simulation
conversion rate
Opis:: The paper deals with the problem of Quality of Web Service (QoWS) in e-commerce Web servers, i.e. in retail Web stores. It concerns the admission control and scheduling algorithm for a Web server system, which aims at preventing the system from overload to provide high QoWS level and ultimately, to increase Web site's conversion rate, i.e. to turn more visitors into customers. The sensitivity of the algorithm to changes in its basic parameter values was analyzed by using a simulation-based approach. Special attention was paid to evaluation of the parameter impact on conventional and business-related system performance metrics.
Źródło:: Management and Production Engineering Review; 2013, 4, 1; 65-73
2080-8208
2082-1344
Pojawia się w:: Management and Production Engineering Review
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Literature survey of interleaved DC-DC step-down converters for proton exchange membrane electrolyzer applications
Autorzy:: Guida, Vittorio
Guilbert, Damien
Douine, Bruno
Powiązania:: https://bibliotekanauki.pl/articles/136190.pdf
Data publikacji:: 2019
Wydawca:: EEEIC International Barbara Leonowicz Szabłowska
Tematy:: electrolyzer
interleaved converters
renewable sources
current ripple
energy efficiency
power switch
faults
reliability
conversion rate
Opis:: Recently, the use of electrolyzers for hydrogen production through water electrolysis is of great interest in the industrial field to replace current hydrogen production pathways based on fossil fuels (e.g. oil, coal). The electrolyzers must be supplied with a very low DC voltage in order to produce hydrogen from the deionized water. For this reason, DC-DC step-down converters are generally used. However, these topologies present several drawbacks from output current ripple and voltage gain point of view. In order to meet these expectations, interleaved DC-DC step-down converters are considered as promising and interesting candidates to supply proton exchange membrane (PEM) electrolyzers. Indeed, these converters offer some advantages including output current ripple reduction and reliability in case of power switch failures. In addition, over the last decade, many improvements have been brought to these topologies with the aim to enhance their conversion gain. Hence, the main goal of this paper is to carry out a thorough state-of-the-art of different interleaved step-down DC-DC topologies featuring a high voltage gain, needed for PEM electrolyzer applications.
Źródło:: Transactions on Environment and Electrical Engineering; 2019, 3, 1; 33-43
2450-5730
Pojawia się w:: Transactions on Environment and Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Теплоснабжения на основе термотрансформированной энергии стабилизирующего охлаждения печи и переохлаждения теплоносителя низкопотенциальных источников
Heat supply based on thermotransformed energy of stabilizing cooling of the furnace and supercooling of coolant of low–potential sources
Autorzy:: Petrash, V.D.
Geraskina, E.A.
Danicenko, N.V.
Chernysheva, I.V.
Powiązania:: https://bibliotekanauki.pl/articles/2067774.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Częstochowska
Tematy:: heating and hot water supply
system efficiency
coolant flow rate
conversion rate
ogrzewanie
wydajność systemu
współczynnik konwersji
ciepła woda
Opis:: В статье представлены исследования совместной работы отопления и горячего водоснабжения. Установлено, что эффективность системы возрастает с увеличением расхода теплоносителя на горячее водоснабжение, а также при снижении температуры теплоносителя в системе отопления. Аналитическим способом установлено для системы с доохлаждением рациональное сочетание исходных и режимных условий, которое в системе анализируемой структуры обеспечивает оптималное значение коэффициента преобразования.
The article presents a study of the joint work of heating and hot water. It has been established that the efficiency of the system increases with an increase in the coolant flow rate for hot water supply, as well as with a decrease in the coolant temperature in the heating system. Analytically, a rational combination of initial and regime conditions is established for a system with subcooling, which in the system of the analyzed structure provides the optimal value of the conversion coefficient.
Źródło:: Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo; 2018, 24 (174); 280-284
0860-7214
Pojawia się w:: Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Performance of map applications on mobile devices: case study
Wydajność aplikacji mapowej na urządzeniach mobilnych: studium przypadku
Autorzy:: Król, Karol
Halva, Jozef
Pagáč Mokrá, Alexandra
Powiązania:: https://bibliotekanauki.pl/articles/1429599.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
Tematy:: website performance
website speed test
loading speed
conversion rate
quality indices
wydajność strony internetowej
test szybkości witryny
prędkość ładowania
współczynnik konwersji
wskaźniki jakości
Opis:: Performance is one of the most important indicators of quality of software. It plays a significant role not only for business websites and apps, but in case of map components and applications, especially for mobile devices. The aim of the paper is to measure performance of map applications on mobile devices. The performance testing was run on a prototype of an interactive map component of the zoom-lens type using selected web applications. Speed Index (measurement unit) reached the value of 1601 milliseconds, and Performance Score obtained the highest possible value (100 units). A high value of Lighthouse Performance Score was also noted (98 units). Study showed that satisfying measurement results of indices in relation to the time of loading of the component in the browser window are associated with a small size of the component. In case of small components, which enhance the functionality of map websites and apps, it is recommended to compress all parts of the component, regardless of the results of the performance tests.
Wydajność jest jednym z najważniejszych wyznaczników jakości oprogramowania. Wydajność ma istotne znaczenie nie tylko dla witryn i aplikacji biznesowych, ale także w przypadku komponentów i aplikacji mapowych, w szczególności na urządzeniach mobilnych. Celem pracy jest pomiar wydajności aplikacji mapowej na urządzeniach mobilnych. Testom wydajności poddano prototyp interaktywnego komponentu mapowego typu „zoom-lens”. Testy przeprowadzono przy pomocy wybranych aplikacji internetowych. Wskaźnik Speed Index (pomiar jednostkowy) osiągnął wartość 1601 milisekund, a wskaźnik Performance Score osiągną największą możliwą wartość (100 jednostek). Odnotowano także dużą wartość wskaźnika Lighthouse Performance Score (98 jednostek). Badania pokazały, że zadowalające wyniki pomiaru wskaźników związanych z czasem wczytywania komponentu w oknie przeglądarki wynikają z niewielkiego rozmiaru komponentu. W przypadku niewielkich komponentów, które rozszerzają funkcjonalność witryn i aplikacji mapowych wskazana jest kompresja wszystkich część składowych komponentu, niezależnie od wyników testów wydajności.
Źródło:: Geomatics, Landmanagement and Landscape; 2020, 3; 55-64
2300-1496
Pojawia się w:: Geomatics, Landmanagement and Landscape
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Variable Ratio Sample Rate Conversion Based on Fractional Delay Filter
Autorzy:: Blok, M.
Drózda, P.
Powiązania:: https://bibliotekanauki.pl/articles/177050.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: sample rate conversion
offset window method
variable fractional delay filter
variable resampling ratio
Opis:: In this paper a sample rate conversion algorithm which allows for continuously changing resampling ratio has been presented. The proposed implementation is based on a variable fractional delay filter which is implemented by means of a Farrow structure. Coefficients of this structure are computed on the basis of fractional delay filters which are designed using the offset window method. The proposed approach allows us to freely change the instantaneous resampling ratio during processing. Using such an algorithm we can simulate recording of audio on magnetic tape with nonuniform velocity as well as remove such distortions. We have demonstrated capabilities of the proposed approach based on the example of speech signal processing with a resampling ratio which was computed on the basis of estimated fundamental frequency of voiced speech segments.
Źródło:: Archives of Acoustics; 2014, 39, 2; 231-242
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The Effect of Probiotic Addition in Commercial Feed to Growth and Survival Rate of Sangkuriang Catfishes (Clarias gariepinus (Burchell, 1822))
Autorzy:: Lili, Walim
Hartanto, Rezky
Kurniawati, Nia
Herawati, Titin
Bangkit, B. S. Ibnu
Powiązania:: https://bibliotekanauki.pl/articles/1109212.pdf
Data publikacji:: 2018
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Clarias gariepinus
Sangkuriang catfish
feed conversion ratio
probiotic
specific growth rate
survival rate
Opis:: This study was conducted to determine the effect of probiotic addition in commercial feed to the growth and survival rate of Sangkuriang catfish (Clarias gariepinus). This research was conducted at the Ciparanje Experimental Pond Laboratory, Faculty of Fisheries and Marine Sciences, Universitas Padjadjaran, Jatinangor, West Java. The method in used this research was Completely Randomized Design with four treatments and four replications. The treatment was the variances of probiotic addition which consisted of control (without probiotics), probiotic addition at as much as 0.5 grams / kg of feed, 1 gram / kg of feed and 1.5 grams / kg of feed. The parameters observed were specific growth rate (SGR), absolute biomass, survival rate (SR) and feed conversion ratio (FCR). Data were analyzed using Variant Analysis, at 95% confidence level, and continued with Duncan's Multiple Range Test. The results showed that the increase in the daily growth rate of Sangkuriang catfish was straight-line with the addition of probiotics. Furthermore, commercial probiotics with a dose of 1 gram / kg of feed resulted in specific growth rate of 4.22%, absolute weight of 11 grams, survival rate (SR) of 97.5% and FCR of 0.89.
Źródło:: World News of Natural Sciences; 2018, 21; 130-140
2543-5426
Pojawia się w:: World News of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Effect of Using Fermented Lemna sp. in Fish Feed on Growth Rate of Nilem Carp (Osteochilus hasselti)
Autorzy:: Iskandar, Iskandar
Andriani, Yuli
Rostika, Rita
Zidni, Irfan
Riyanti, Namira Alfisah
Powiązania:: https://bibliotekanauki.pl/articles/1076662.pdf
Data publikacji:: 2019
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Daily growth rate
Feed conversion ratio
Fermentation
Lemna sp.
Nilem carp
Osteochilus hasselti
Survival rate
Opis:: This research aims to determine the highest level of fermented Lemna sp. used in artficial feed to produce optimum growth rate of Nilem Carp. This research was conducted from March to July 2016, in the Ciparanje Laboratory and Aquaculture Laboratory of the Fisheries and Marine Science Faculty, Universitas Padjadjaran. The method used in this research is experimental, and is of a Completely Randomized Design (CRD). It consists of five treatments and three repetitions, providing one commercial diet (as control) and four fermented Lemna sp. levels (10%, 20%, 30%, and 40%). Collected data are analyzed with analysis of variance F-test at 95% confidence level. The parameters observed in this research are divided into four sub-parameters: nutrition changes of fermented Lemna sp., daily growth rate, feed conversion ratio and survival rate. The crude fiber content of Lemna sp. was reduced from 18.37% to 13.57%, and protein content increased from 19.37% to 23.47%, respectively, after fermentation. Based on the results of this research, fermented Lemna sp. used in fish feed at 40% level produced the best results: a daily growth rate at 0.75%, a feed conversion ratio at 3.61 and a survival rate of up to 100%.
Źródło:: World News of Natural Sciences; 2019, 26; 157-166
2543-5426
Pojawia się w:: World News of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Mass throughput rate calculation for X-ray facilities
Autorzy:: Ziaie, F.
Tahami, S.
Powiązania:: https://bibliotekanauki.pl/articles/148864.pdf
Data publikacji:: 2005
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: bremsstrahlung
dose uniformity
radiation processing
dynamic mode
mass throughput rate
conversion
Opis:: Abstract In this work, the mass throughput rate in a radiation processing center, equipped with an X-ray facility, is calculated by means of a curve against the thickness of the material, along with the variation of dose uniformity. Therefore, depending on the desired dose value, the best thickness and the mass throughput rate can be calculated. The calculation results for the 5 and 10 MeV X-ray bremsstrahlung for polyethylene and wood as the irradiation products, have been obtained by using a Monte-Carlo computer code. In addition, the experimental results at the same geometry and materials were compared with those calculated.
Źródło:: Nukleonika; 2005, 50, 3; 121-124
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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