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S. V. Raksha,O. S. Kuropiatnyk,O. L. Krasnoshchok
Pág. 60 - 71
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Serhii Halko, Oleksandr Vershkov, Jakub Horák, Oleksandr Lezhenkin, Larysa Boltianska, Anatolii Kucher, Olena Suprun, Oleksandr Miroshnyk and Vitalii Nitsenko
This article deals with the problem of harvesting combed straw by mixing it with the soil and the process of combed straw decomposition in particular. The idea and purpose of the research are also analysed in terms of circular economy, which represents a...
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Dejian Zhang, Jian Zhang, Zhigang Jiao, Qingjie Ni and Qiuping Guo
Based on the lift-to-drag ratio of a two-dimensional trajectory correction projectile, in this paper, a novel correction efficiency coefficient model has been proposed for the trajectory optimization of a two-dimensional trajectory correction projectile,...
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Zhiqiang Sheng, Yu Dan, Lan Zhang and Bowen Zhong
Jet mixings of a coplanar alternating-lobe nozzle (CoALN), scarfing alternating-lobe nozzle (ScALN), sword alternating-lobe nozzle (SwALN), and sword and chevron alternating-lobe nozzle (SwChALN) were numerically investigated using three different far-fi...
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Junshik Um, Seonghyeon Jang, Young Jun Yoon, Seoung Soo Lee, Ji Yi Lee, Kyung Man Han, Won Jun Choi, Yong Pyo Kim, Cheol-Hee Kim and Chang Hoon Jung
Among many parameters characterizing atmospheric aerosols, aerosol mass extinction efficiency (MEE) is important for understanding the optical properties of aerosols. MEE is expressed as a function of the refractive indices (i.e., composition) and size d...
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Oleksandr Plakhtii,Volodymyr Nerubatskyi,Nadiia Karpenko,Denys Hordiienko,Olha Butova,Hryhorii Khoruzhevskyi
Pág. 36 - 44
The traction electric drives for electric rolling stock of alternating current employ the diode and thyristor rectifiers that predetermine a series of shortcomings. These include the significant emission of reactive power and higher harmonics of currents...
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Andreas Tewes and Jürgen Schellberg
Radiation Use Efficiency (RUE) defines the productivity with which absorbed photosynthetically active radiation (APAR) is converted to plant biomass. Readily used in crop growth models to predict dry matter accumulation, RUE is commonly determined by ela...
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Vanessa Mendoza-Grimón, José Manuel Hernández-Moreno and María Del Pino Palacios-Díaz
Water deficit in semi-arid regions limits the future of the livestock sector. Also, its high price represents a percentage of the total cost of forage production. Non-conventional water resources applied by subsurface drip irrigation (SDI), in which the ...
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Victor Shapovalov, Alexandr Permyakov, Alexander Klochko
Pág. 118 - 126
The subject matter of the research in the article is the process of restoring the quality and accuracy of the working surface of the wheelsets of the main electric locomotives, electric sections. The purpose of the work is to develop a modeling method fo...
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Anastasios Katsileros, Nikolaos Antonetsis, Maria-Georgia Gkika, Eleni Tani, Penelope J. Bebeli and Ioannis Tokatlidis
The Honeycomb Selection Design (HSD) is an innovative experimental method whose main feature is the even and systematic entry arrangement. Its systematicity, if combined with the absence of inter-plant competition that maximizes the phenotypic expression...
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Tran Dinh Khang, Nguyen Duc Vuong, Manh-Kien Tran and Michael Fowler
Clustering is an unsupervised machine learning technique with many practical applications that has gathered extensive research interest. Aside from deterministic or probabilistic techniques, fuzzy C-means clustering (FCM) is also a common clustering tech...
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Qizong Sun, Ertian Hua, Liying Sun, Linfeng Qiu, Yabo Song and Mingwang Xiang
The flapping hydrofoil bionic pump is an innovative hydrodynamic device that utilizes flapping hydrofoil technology. Flapping hydrofoil bionic pumps are crucial in addressing issues like inadequate river hydropower and limited water purification capabili...
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Deo Leko Pudaka, Rusdarti Rusdarti, P. Eko Prasetyo
Pág. 31 - 38
The low production of rice in Sengah Temila District of Landak Regency makes farmers? income low. The purpose of this research was to analyze production, efficiency (technical, price and economy) and farmer income. The approach used in this research was ...
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Zhanfeng Qi, Min Jiang, Lishuang Jia, Bo Zou and Jingsheng Zhai
A numerical investigation on the propulsion performance of the semi-active flapping foil of the wave glider with different mass ratio and damping coefficient is investigated. The commercial CFD software Fluent is used to solve the URANS equations around ...
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Henri Siro Evrard,June Alisson Westarb Cruz
Pág. 59 - 92
The present work aims to verify the efficiency of factors of return in predicting stocks? returns traded in BM&FBovespa. Have been tested 39 models, grouping 16 variables in their totality, in families and in isolation. All the models have been tested us...
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Enrique Bonet, Beniamino Russo, Ricard González, Maria Teresa Yubero, Manuel Gómez and Martí Sánchez-Juny
Freshwater scarcity has driven the integration of technological advancements and automation systems in agriculture in order to attempt to improve water-use efficiency. For irrigation canals, water-use efficiency is, in great measure, limited by the perfo...
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Evangelos Bellos, Panagiotis Lykas, Dimitrios Tsimpoukis, Dimitrios N. Korres, Angeliki Kitsopoulou, Michail Gr. Vrachopoulos and Christos Tzivanidis
The goal of this investigation is the thorough analysis and optimization of a solar-assisted heat pump heating unit for covering the space heating demand for a building in Athens, Greece. The novelty of the studied system is the use of a high-temperature...
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Jaime Sieres, Ignacio Ortega, Fernando Cerdeira, Estrella Álvarez and José M. Santos
The seasonal performance of a heat pump indicates its average performance during the heating and/or cooling season, taking into account the different energy demands and their variability over time. Several European and international regulations and polic...
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Abhay Patil, Sujan Gudigopuram, Burak Ayyildiz, Adolfo Delgado and Gerald Morrison
A four stage helicoaxial pump was tested under varying operating conditions. A range of inlet pressures, rotational speeds (3000, 3600 rpm), and gas void fractures (GVFs) were considered for two fluid viscosities. The head developed and power input to ru...
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Devia Gahana
Pág. 23 - 33
Heat exchanger is one of the supporting production equipment that move the heat energy from one of fluid to another fluid flow. One example of a heat exchanger in power plant industry is High Pressure Heater (HPH). HPH is high pressure feedwater heater t...
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