Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "reduction" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 1062
Tytuł:
Field Experiment as a Tool to Verify The Effectiveness of Prototype Track Structure Components Aimed at Reducing Railway Noise Nuisance
Autorzy:
Kraśkiewicz, Cezary
Klekot, Grzegorz
Książka, Piotr
Zbiciak, Artur
Mossakowski, Przemysław
Chacińska, Patrycja
Al Sabouni-Zawadzka, Anna
Powiązania:
https://bibliotekanauki.pl/articles/31339754.pdf
Data publikacji:
2024
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
vibroacoustic isolator
ballasted track structure
ballastless track structure
noise reduction
field test.
Opis:
The almost unlimited possibilities of modern computational tools create the temptation to study phenomena related to the operation of engineering objects exclusively using complex numerical simulations. However, the fascination with multi-parametric complex computational models, whose solutions are obtained using iterative techniques, may result in qualitative discrepancies between reality and virtual simulations. The need to verify on real objects the conclusions obtained from numerical calculations is therefore indisputable. The enormous cost and uniqueness of large-scale test stands significantly limit the possibility of conducting tests under real conditions. The solution may be an experiment focused on testing features relevant to the given task, while minimising the dimensions of the objects under consideration. Such conditions led to the concept of conducting a series of field experiments to verify the effectiveness of prototype track components, which were developed using numerical simulations to reduce the noise caused by passing trains. The main aim of this study is to examine the acoustic efficiency of prototype porous concrete sound absorbing panels, in relation to the ballasted and ballastless track structures. Presented results of the proposed unconventional experiments carried out on an improvised test stand using the recorded acoustic signals confirm the effectiveness of the developed vibroacoustic isolators.
Źródło:
Archives of Acoustics; 2024, 49, 1; 61-71
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wyzwania w produkcji prototypów – droga do doskonałości
Challenges in prototype manufacturing – the road to excellence
Autorzy:
Dąbrowska, Karolina
Gołąbek, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/31804046.pdf
Data publikacji:
2024
Wydawca:
Wydawnictwo Druk-Art
Tematy:
prototyp
zarządzanie
poprawa produktywności
obniżenie kosztów
prototype
management
productivity improvement
cost reduction
Opis:
Prototyp jest materializacją abstrakcyjnej idei, czyli pomysłu na innowację. Z ogromnej liczby powstających prototypów tylko część wchodzi do masowej produkcji, a nieliczne osiągają sukces rynkowy. Warto wspomnieć, że niektóre prototypy mogą być jednocześnie wyrobami przeznaczonymi do sprzedaży, bez konieczności wprowadzenia zmian i ulepszeń. Problemy i wyzwania jakie przysparza produkcja prototypów można, a nawet trzeba minimalizować. Poprawne zarządzanie procesem projektowania i produkcji prototypów może znacznie wpłynąć na jakość końcowego produktu oraz oszczędność czasu i pieniędzy.
A prototype is the materialization of an abstract idea or innovation concept. Within the huge number of prototypes that are created, only some enter mass production, and few achieve market success. It is worth mentioning that some prototypes can simultaneously be marketable products, without any changes or improvements. The problems and challenges posed by the production of prototypes can and even should be minimized. Correct management of the design and production process of prototypes can significantly affect the quality of the final product and save time and money.
Źródło:
Napędy i Sterowanie; 2024, 26, 3; 56-58
1507-7764
Pojawia się w:
Napędy i Sterowanie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparative study for outlier detection methods in high dimensional text data
Autorzy:
Park, Cheong Hee
Powiązania:
https://bibliotekanauki.pl/articles/2201316.pdf
Data publikacji:
2023
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
curse of dimensionality
dimension reduction
high dimensional text data
outlier detection
Opis:
Outlier detection aims to find a data sample that is significantly different from other data samples. Various outlier detection methods have been proposed and have been shown to be able to detect anomalies in many practical problems. However, in high dimensional data, conventional outlier detection methods often behave unexpectedly due to a phenomenon called the curse of dimensionality. In this paper, we compare and analyze outlier detection performance in various experimental settings, focusing on text data with dimensions typically in the tens of thousands. Experimental setups were simulated to compare the performance of outlier detection methods in unsupervised versus semisupervised mode and uni-modal versus multi-modal data distributions. The performance of outlier detection methods based on dimension reduction is compared, and a discussion on using k-NN distance in high dimensional data is also provided. Analysis through experimental comparison in various environments can provide insights into the application of outlier detection methods in high dimensional data.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2023, 13, 1; 5--17
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A complexity efficient PAPR reduction scheme for FBMC-based VLC systems
Autorzy:
Roshdy, Radwa A.
Hussein, Aziza I.
Mabrook, Mohamed M.
Salem, Mohammed A.
Powiązania:
https://bibliotekanauki.pl/articles/2204164.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
visible light communication
filter bank multicarrier
peak-to-average power ratio reduction
computational complexity
cube satellite communication link
inter-satellite communications
Opis:
Visible light communication based on a filter bank multicarrier holds enormous promise for optical wireless communication systems, due to its high-speed and unlicensed spectrum. Moreover, visible light communication techniques greatly impact communication links for small satellites like cube satellites, and pico/nano satellites, in addition to inter-satellite communications between different satellite types in different orbits. However, the transmitted visible signal via the filter bank multicarrier has a high amount of peak-to-average power ratio, which results in severe distortion for a light emitting diode output. In this work, a scheme for enhancing the peak-to-average power ratio reduction amount is proposed. First, an algorithm based on generating two candidates signals with different peak-to- average power ratio is suggested. The signal with the lowest ratio is selected and transmitted. Second, an alternate direct current-biased approach, which is referred to as the addition reversed method, is put forth to transform transmitted signal bipolar values into actual unipolar ones. The performance is assessed through a cumulative distribution function of peak-to-average power ratio, bit error rate, power spectral density, and computational complexity. The simulation results show that, compared to other schemes in literature, the proposed scheme attains a great peak-to-average power ratio reduction and improves the bit the error rate performance with minimum complexity overhead. The proposed approach achieved about 5 dB reduction amount compared to companding technique, 5.5 dB compared to discrete cosine transform precoding, and 8 dB compared to conventional direct current bias of an optical filter bank multicarrier. Thus, the proposed scheme reduces the complexity overhead by 15.7% and 55.55% over discrete cosine transform and companding techniques, respectively.
Źródło:
Opto-Electronics Review; 2023, 31, 1; art. no. e144919
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A contemporary multi-objective feature selection model for depression detection using a hybrid pBGSK optimization algorithm
Autorzy:
Kavi Priya, Santhosam
Pon Karthika, Kasirajan
Powiązania:
https://bibliotekanauki.pl/articles/2201021.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
depression detection
text classification
dimensionality reduction
hybrid feature selection
wykrywanie depresji
klasyfikacja tekstu
redukcja wymiarowości
wybór funkcji
Opis:
Depression is one of the primary causes of global mental illnesses and an underlying reason for suicide. The user generated text content available in social media forums offers an opportunity to build automatic and reliable depression detection models. The core objective of this work is to select an optimal set of features that may help in classifying depressive contents posted on social media. To this end, a novel multi-objective feature selection technique (EFS-pBGSK) and machine learning algorithms are employed to train the proposed model. The novel feature selection technique incorporates a binary gaining-sharing knowledge-based optimization algorithm with population reduction (pBGSK) to obtain the optimized features from the original feature space. The extensive feature selector (EFS) is used to filter out the excessive features based on their ranking. Two text depression datasets collected from Twitter and Reddit forums are used for the evaluation of the proposed feature selection model. The experimentation is carried out using naive Bayes (NB) and support vector machine (SVM) classifiers for five different feature subset sizes (10, 50, 100, 300 and 500). The experimental outcome indicates that the proposed model can achieve superior performance scores. The top results are obtained using the SVM classifier for the SDD dataset with 0.962 accuracy, 0.929 F1 score, 0.0809 log-loss and 0.0717 mean absolute error (MAE). As a result, the optimal combination of features selected by the proposed hybrid model significantly improves the performance of the depression detection system.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2023, 33, 1; 117--131
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A note on hardness of multiprocessor scheduling with scheduling solution space tree
Autorzy:
Dwibedy, Debasis
Mohanty, Rakesh
Powiązania:
https://bibliotekanauki.pl/articles/27312879.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
combinatorial structures
computational complexity
hardness
makespan
multiprocessor scheduling
multiuser
NP-completeness
nondeterministic algorithms
reduction
scheduling solution space tree
Opis:
We study the hardness of the non-preemptive scheduling problem of a list of independent jobs on a set of identical parallel processors with a makespan minimization objective. We make a maiden attempt to explore the combinatorial structure of the problem by introducing a scheduling solution space tree (SSST) as a novel data structure. We formally define and characterize the properties of SSST through our analytical results. We show that the multiprocessor scheduling problem is N P-complete with an alternative technique using SSST and weighted scheduling solution space tree (WSSST) data structures. We propose a non-deterministic polynomial-time algorithm called magic scheduling (MS) based on the reduction framework. We also define a new variant of multiprocessor scheduling by including the user as an additional input parameter, which we called the multiuser multiprocessor scheduling problem (MUMPSP). We also show that MUMPSP is N P-complete. We conclude the article by exploring several non-trivial research challenges for future research investigations.
Źródło:
Computer Science; 2023, 24 (1); 53--74
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study on the Recovery of Zinc and Pig Iron from Byproducts after Steelmaking Dust Treatment
Autorzy:
Wang, Jei-Pl
Powiązania:
https://bibliotekanauki.pl/articles/2203737.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
steelmaking dust
reduction
recovery
zinc
pig iron
Opis:
In this study, a research was conducted to recover metallic zinc and pig iron and to improve the purity and the recovery rate through a reduction process for zinc and iron in the byproducts that are generated after steelmaking dust treatment. As the result of the calcination, it was confirmed that Cl (6.06%) and K (3.37%) decreased to Cl (2.75%) and K (0.22%), respectively. For the zinc powder that was recovered with reaction temperature of 1100°C, reaction time of 4 hours, and argon gas of 1L/min as the optimal conditions. The measurement for the purity of zinc was 99.8% and the recovery rate was 92.14%. The melt reduction for recovering pig iron from the residue was reacted under reaction temperature of 1600°C, flux composition (CaO:SiO2) of 1:1, and reducing agent infusion ratio (residue: C) of 14:1, and the pig iron was measured to have a purity of 87.7% and a recovery rate of 91.81%.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 205--208
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of legal, political, social and technical aspects concerning enterprises in the energy sector in the era of low-emission economy
Analiza aspektów prawnych, politycznych, społecznych i technicznych dotyczących przedsiębiorstw sektora energetycznego w dobie gospodarki niskoemisyjnej
Autorzy:
Czepło, Filip
Borowski, Piotr F.
Powiązania:
https://bibliotekanauki.pl/articles/31343898.pdf
Data publikacji:
2023
Wydawca:
Akademia Finansów i Biznesu Vistula
Tematy:
emission reduction
energy companies
energy policy
energy security
low-emission economy
photovoltaic farms
przedsiębiorstwa energetyczne
redukcja emisji
polityka energetyczna
bezpieczeństwo energetyczne
gospodarka zeroemisyjna
farmy fotowoltaiczne
Opis:
The conducted research using the desk research method aimed to provide a detailed analysis of legal and political aspects influencing the operations of businesses in the energy sector. The scope of the study also included an evaluation of the state’s policies, the formation of public-private partnerships, and mobilization of both individual consumers and entrepreneurs towards actions for energy security and the pursuit of a low-emission economy. The research results revealed that issues related to energy security, climate protection, and greenhouse gas emission reduction are influenced by various factors. A key conclusion is that effective actions in these areas depend not only on diverse structural elements but also on the collaboration between the government, businesses, and individual consumers. Both individual consumers and entrepreneurs play a crucial role in the transformation process towards a secure and low-emission economy. Legal aspects, such as emission regulations and energy security standards, prove to be significant in shaping the behavior of businesses. The impact of government policies, especially through the establishment of public-private partnerships, can significantly influence the effective achievement of goals related to energy and environmental protection.
W przeprowadzonych badaniach, zastosowano metodę desk research, która miała na celu dostarczenie szczegółowej analizy aspektów prawnych i politycznych wpływających na działalność przedsiębiorstw w sektorze energetycznym. Zakres studium obejmował również ocenę polityki państwa, tworzenie partnerstw publiczno-prywatnych oraz mobilizację zarówno indywidualnych konsumentów, jak i przedsiębiorców do działań na rzecz bezpieczeństwa energetycznego i dążenia do gospodarki o zerowych emisjach. Wyniki badań ujawniły, że kwestie związane z bezpieczeństwem energetycznym, ochroną klimatu i redukcją emisji gazów cieplarnianych są kształtowane przez różne czynniki. Kluczowym wnioskiem jest, że skuteczne działania w tych obszarach zależą nie tylko od różnorodnych elementów strukturalnych, ale także od współpracy między rządem, przedsiębiorstwami a indywidualnymi konsumentami. Zarówno indywidualni konsumenci, jak i przedsiębiorcy odgrywają kluczową rolę w procesie transformacji ku bezpiecznej i gospodarce o zerowych emisjach. Aspekty prawne, jak regulacje dotyczące emisji i standardy bezpieczeństwa energetycznego, są istotne dla kształtowania zachowań przedsiębiorstw. Wpływ polityk rządowych, zwłaszcza poprzez tworzenie partnerstw publiczno-prywatnych, może znacząco wpływać na skuteczne osiągnięcie celów związanych z energią i ochroną środowiska.
Źródło:
Społeczeństwo i Polityka; 2023, 3(76); 155-176
1733-8050
Pojawia się w:
Społeczeństwo i Polityka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Armed Forces and Disaster Risk Reduction: A Theoretical Approach
Siły zbrojne w redukcji ryzyka katastrof. Ujęcie teoretyczne
Autorzy:
Gromek, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/22426517.pdf
Data publikacji:
2023-09-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
armed forces
disaster risk reduction
Sendai
cooperation
risk
siły zbrojne
współdziałanie
ryzyko
redukcja ryzyka katastrof
Opis:
This article presents a theoretical connection of armed forces operations and a disaster risk reduction concept. The objective is to elaborate a model of armed forces participation in disaster risk reduction in relation to the Sendai Framework for Disaster Risk Reduction 2015–2030. The research method bases on a review of the literature and a cognitive design of the participation model. General role of armed forces, potential and societal expectations are factors that place them in a context of disaster risk reduction. Soldiers are said to participate in protection of the most important utilitarian values regardless of circumstances (military hazards and non-military hazards). Their operations might be ascribed into limiting of hazard power, reducing vulnerabilities, shortening exposure, improving resilience, and strengthening capacities to cope with a disaster. They can reduce the risk associated with military hazards and non-military hazards. The concept may be a reference in designing synergy in cooperation between military and non-military entities.
Artykuł prezentuje teoretyczne połączenie działań sił zbrojnych i koncepcji redukcji ryzyka katastrof. Jego celem jest opracowanie modelu partycypacji sił zbrojnych w redukcji ryzyka katastrof w związku z Ramowym programem działań z Sendai na rzecz ograniczenia ryzyka katastrof na lata 2015–2030 (Sendai Framework for Disaster Risk Reduction 2015–2030). Metoda badań bazuje na przeglądzie literatury oraz poznawczym zaprojektowaniu wspomnianego modelu. Ogólna rola sił zbrojnych, potencjał i powszechne oczekiwania społeczne to czynniki sytuujące siły zbrojne w kontekście redukcji ryzyka katastrof. Żołnierzy postrzega się jako zaangażowanych w ochronę najważniejszych wartości utylitarnych bez względu na okoliczności (zagrożenia militarne i zagrożenia niemilitarne). Ich działania mogą być przypisane do ograniczania siły zagrożenia, redukowania podatności na zagrożenia, skracania ekspozycji, podnoszenia odporności i wzmacniania zdolności radzenia sobie z katastrofą. Siły zbrojne mogą redukować omawiane ryzyko w związku z zagrożeniami militarnymi i niemilitarnymi. Opracowana koncepcja może stanowić punkt odniesienia w projektowaniu synergii wynikającej ze współdziałania podmiotów militarnych i niemilitarnych.
Źródło:
Athenaeum. Polskie Studia Politologiczne; 2023, 79; 47-69
1505-2192
Pojawia się w:
Athenaeum. Polskie Studia Politologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Basic Issues of Brandy Industry Waste Conservation
Autorzy:
Sahakyan, Samvel
Yedoyan, Tatevik
Sukiasyan, Robert
Baghdagyulyan, Armine
Bakunts, Satenik
Powiązania:
https://bibliotekanauki.pl/articles/27314296.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
brandy industry waste
distillery dreg
optimal condensation
cost reduction
agricultural land improvement
Opis:
The purpose of the study is to cost-effective and environmentally friendly procedures for the condensation of waste generated from brandy production (distillery dreg) for agricultural use. The experiments were carried out between 2020–2022 under laboratory conditions. It has been shown that in order to reduce the significant cost of distillery dreg transportation, it is advisable to carry out its condensation by means of distillation. Laboratory studies and feasibility calculations revealed that distillery dreg may be condensed by up to five times, allowing for a corresponding reduction in transportation costs, while maintaining its quality indicators. It is suggested that the brandy alcohol distillation process be altered in a way that will allow for the production of condensed distillery dreg substance, with minimal additional energy expenditure and capital investment. The suggested method makes it possible to not only improve the ameliorative conditions of agricultural land, but also to address significant environmental protection issues.
Źródło:
Geomatics and Environmental Engineering; 2023, 17, 5; 45-60
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics and applications of iron oxide reduction processes
Autorzy:
Halim, K.S. Abdel
El-Geassy, A .A.
Nasr, M. I.
Ramadan, Mohamed
Fathy, Naglaa
Al-Ghamdi, Abdulaziz S.
Powiązania:
https://bibliotekanauki.pl/articles/27315666.pdf
Data publikacji:
2023
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
ironmaking
iron oxides
reduction
extractive metallurgy
green hydrogen
Opis:
The present review handles the main characteristics of iron oxide reduction and its industrial applications. The reduction of iron oxide is the basis of all ironmaking processes, whether in a blast furnace or by direct reduction and/or direct smelting processes. The reduction characteristics of iron ores control the efficiency of any ironmaking process and the quality of the produced iron as well. Many controlling parameters should be considered when discussing the reducibility of iron ores such as equilibrium phase diagrams, reduction temperature, pressure, gas composition, and the nature of both iron ores and reducing agent. The different factors affecting the main routes of ironmaking will be highlighted in the present review to give a clear picture of each technology. Moreover, further innovations regarding the reduction of iron oxides such as the reduction by green hydrogen will be discussed.
Źródło:
Polish Journal of Chemical Technology; 2023, 25, 4; 81--92
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis of the heat balance results of the selected Tier III-compliant gas-fuelled two-stroke main engines
Autorzy:
Korlak, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/24202453.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
heat balance
two-stroke engine
LNG
liquified natural gas
SCR
selective catalytic reduction
EGR
exhaust gas recirculation
bilans cieplny
silnik dwusuwowy
skroplony gaz ziemny
selektywna redukcja katalityczna
recyrkulacja spalin
Opis:
Two-stroke engines are distinguished by the highest overall efficiency among all main engines. This is not only due to the low speed, and large piston stroke, but also to the high combustion temperature, which results in an increase in nitrogen oxides (NOx) emission. Technical solutions applied to bring main engines into compliance with current NOx emission standards set by the Tier III limits include the use of SCR and EGR systems, the implementation of the Otto cycle, and the application of liquified natural gas (LNG) as the low-emission fuel. Impact of the available Tier III-compliant technologies on the heat balance results is analysed using the example of the currently most popular dual-fuel main engines, i.e. WinGD X92DF and MAN G95ME-C10.5-GI. The possibilities of waste heat recovery in the electricity generation process and thereby improving the ship energy efficiency are discussed.
Źródło:
Combustion Engines; 2023, 62, 2; 24--28
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis of the life-cycle emissions of carbon dioxide emitted by battery electric vehicles using various energy mixes and vehicles with ICE
Autorzy:
Borkowski, Adam
Zawiślak, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/24202422.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
sustainable mobility
vehicle CO2 emission
life cycle assessment
carbon footprint
GHG reduction
zrównoważona mobilność
emisja CO2
ocena cyklu życia
ślad węglowy
redukcja emisji gazów cieplarnianych
Opis:
The research aims to find an effective way to reduce real-world CO2 emissions of passenger vehicles, by answering the question of what kind of vehicles in various countries generates the smallest carbon footprint. Emissions were calculated for vehicles from three of the most popular segments: small, compact, and midsize, both with conventional body and SUVs. Each type of vehicle was analyzed with various types of powertrain: petrol ICE (internal combustion engine), diesel ICE, LPG ICE, petrol hybrid, LPG hybrid and BEV (battery electric vehicle) with four different carbon intensity of electric energy source. The final conclusion provides guidelines for environmentally responsible decision-making in terms of passenger vehicle choice.
Źródło:
Combustion Engines; 2023, 62, 1; 3--10
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Competitive insertion of the citrus-lemon chain in global value chains in Colombia
Autorzy:
López, Aleksander Blandón
Vega, Gerardo Pedraza
Rubio-Rodriguez, Gustavo Adolfo
Powiązania:
https://bibliotekanauki.pl/articles/27324052.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Zielonogórski. Wydział Ekonomii i Zarządzania
Tematy:
Colombia
sustainable development
reduction of poverty
vulnerable sectors
rural areas
citrus products
competitiveness
Kolumbia
zrównoważony rozwój
redukcja ubóstwa
sektory wrażliwe
obszary wiejskie
produkty cytrusowe
konkurencyjność
Opis:
This research delves into the identification of opportunities for the consolidation of the lemon value chain in the department of Tolima, Colombia, through the associativity model called: Special Administrative Planning Region. This model is a land-use planning system, officially recognized in Article 325 of the Political Constitution of Colombia and in Law 114 of 2011, which functions as a planning tool at the regional level. Its main objective is to integrate a given region with other territorial entities at the departmental level. The study is framed within exploratory research that employs qualitative and quantitative methodologies for its development, in addition to using data collection instruments, in order to identify the main elements that define the possibilities of establishing a profitable and sustainable value chain in the citrus-lime sector in Tolima. The results show that the potential for competitive insertion of lemon in global value chains reaches likely international markets such as Russia, Germany, France, Poland, Canada and Saudi Arabia, and the support of different government institutions. However, it is necessary to overcome major threats and weaknesses that currently hinder this insertion.
Źródło:
Management; 2023, 27, 2; 64--81
1429-9321
2299-193X
Pojawia się w:
Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Current ripple reduction for finite control set model predictive control strategy of grid-tied inverter with reference current compensation
Autorzy:
Jin, Nan
Fan, Wuchuang
Fang, Jie
Wu, Jie
Shen, Yongpeng
Powiązania:
https://bibliotekanauki.pl/articles/2202542.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cost function
current ripple reduction
finite control set model predictive control
FCS-MPC
grid-tied inverter
reference current compensation
RCC
Opis:
In the finite control set model predictive control (FCS-MPC) strategy of the grid-tied inverter, the current ripple (CR) affects the selection of optimal voltage vectors, which leads to the increase of output current ripples. In order to solve this problem, this paper proposes a CR reduction method based on reference current compensation (RCC) for the FCS-MPC strategy of grid-tied inverters. Firstly, the influence of the CR on optimal voltage vector selection is analyzed. The conventional CR prediction method is improved, which uses inverter output voltage and grid voltage to calculate current ripples based on the space state equation. It makes up for the shortcomings that the conventional CR prediction method cannot predict in some switching states. The improved CR method is more suitable for the FCS-MPC strategy. In addition, the differences between the two cost functions are compared through visual analysis. It is found that the sensitivity of the square cost function to small errors is better than that of the absolute value function. Finally, the predicted CR is used to compensate the reference current. The compensated reference current is substituted into the square cost function to reduce the CR. The experimental results show that the proposed method reduces the CR by 47.3%. The total harmonic distortion (THD) of output current is reduced from 3.86% to 2.96%.
Źródło:
Archives of Electrical Engineering; 2023, 72, 1; 5--22
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 1062

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies