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Search results for: FEED%20SPEED
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Preliminary studies on the effect of feed speed on the colour change of wood
PublicationThis paper presents the results of preliminary analyses of the effect of cutting parameters on changes in the colour of wood. Beech wood cut with use circular saw was analysed. The cutting parameter tested was the feed speed, represented by the feed per tooth. Sawing processes with different feed per tooth ranging from 0.0008 mm to 0.09 mm were analysed. It was observed that over the entire range of feed rate per tooth analysed,...
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Effect of pine impregnation and feed speed on sound level and cutting power in wood sawing
PublicationThe sound levels along with the cutting power registered during the sawing process of the impregnated and non-impregnated pine wood at two feed speeds are shown and compared in this paper. Statistically significant differences in the acoustic signals occurred at the lower feed rate. The differences became smaller with an increase in the feed speed. In contrast to the sound signal, the differences...
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A Novel Speed Observer for Doubly-Fed Induction Generator
PublicationThe purpose of this paper is to show a new state observer for doubly-fed generator. A proposed z-type observer algorithm based on mathematical model of doubly fed generator with additional variables treated as a disturbances has been used. A nonlinear multiscalar control method has been used to control active and reactive power of the generator. All analyses were verified by simulations and experiments tests.
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Non-Adaptive Speed and Position Observer of Doubly-Fed Induction Generator
PublicationThe non-adaptive speed and position estimation of a doubly-fed induction generator (DFIG) is presented in this paper. The speed observer is based on the mathematical model of DFIG and to stabilize the structure the Lyapunov method is used. The classic stator field-oriented control to active and reactive power control is used in the sensorless control system. The performance of the proposed algorithm of a speed observer is validated...
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Chemical pretreatment of feed water for membrane distillation
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Sugar Beet Pulp as a Biorefinery Substrate for Designing Feed
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Comparison of extraction techniques of robenidine from poultry feed samples
PublicationW publikacji opisano wykorzystanie różnych technik ekstrakcji kokcydistatyków (na przykładzie robenidyny) z próbek pasz zwierzęcych. W trakcie badań porównano wpływ różnych parametrów ekstrakcji na współczynniki odzysku analitu. Wśród wykorzystanych technik ekstrakcji wymienić należy: ekstrakcję za pomocą rozpuszczalnika wspomaganą ultradźwiękami oraz mikrofalami, ekstrakcję w aparatach Soxhleta i Soxteca a także ekstrakcję przez...
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Non-Adaptive Speed and Position Estimation of Doubly-Fed Induction Generator in Grid-Connected Operations
PublicationThe nonadaptive speed and position estimation scheme for a doubly-fed induction generator (DFIG) is presented in this article. The observer structure is based on the extension of the mathematical model of DFIG to the introduced H vector. Based on the defined H vector, the nonadaptive position and speed estimation is proposed. The Lyapunov method is extended to the practical stability theorem to stabilize the structure. The classic...
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Analysis of application of feed-water injector heaters to steam power plants
PublicationStrumienice parowo-wodne to urządzenia, w których zachodzi wymiana masy, pędu i energii między dwoma płynami, pozostającymi w bezpośrednim kontakcie. Mogą one pracować jako pompy, mieszalniki bądź bezprzeponowe wymienniki ciepła. W tym ostatnim aspekcie są one bardzo interesujące do użycia jako regeneracyjne podgrzewacze wody w obiegu cieplnym Rankina stosowanym w siłowniach parowych na lądzie oraz na morzu (statki i okręty). W...
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Modifying CVD synthesised carbon nanotubes via the carbon feed rate
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The effect of application of biopreparations and fungicides on the yield and selected parameters of seed value of seed potatoes
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Implementation of adaptive feed-forward algorithm on embedded PowerPC405 processor for FLASH accelerator
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The utilization of sludge generated in coagulation of fish processing wastewater for liquid feed production
PublicationWykorzystano koagulację do wydzielenia ze ścieków z przemysłu rybnego białek i tłuszczów. Uzyskany osad pokoagulacyjny dodawano do produkcji rybnych hydrolizatów białkowych. Zmodyfikowano proces wytwarzania rybnych hydrolizatów z wykorzystaniem kwasów siarkowego (VI) oraz ortofosforowego (V).
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Statistical evaluation of the effectiveness of different extraction techniques for determining robenidyne levels in poultry feed.
PublicationPoprzez zastosowanie testu Kruskala-Wallisa i chemometrycznej techniki analizy podobieństwa porównano efektywność sześciu różnych technik ekstrakcji (wytrząsanie, ekstrakcja w aparacie Soxhleta, w aparacie Soxteca, wspomaganej ultradźwiękami, wspomaganej promieniowaniem mikrofalowym oraz przyspieszonej ekstrakcji rozpuszczalnikiem) na podstawie wyników odzysku robenidyny z próbek paszy dla ptaków. W zależności od zastosowanej techniki...
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Feed forces during cutting of wood on frame sawing machines with narrow-kerf saws.
PublicationW pracy przedstawiono wybrane efekty energetyczne procesu przecinania drewna na pilarce ramowej za pomocą cienkich pił. Opisano wyniki badań eksperymentalnych sił posuwu przy zastosowaniu pił o dobrej jakości krawędzi skrawających (piły ostre) oraz pił których krawędzie skrawające były obarczone błędami wykonania w postaci wyszczerbień i wykruszeń krawędzi skrawających. Badania przeprowadzono na pilarce ramowej PRW15M.
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Profesor Mieczysław Feld (1924-2012)
PublicationPrzedstawiono dokonania naukowe, dydaktyczne i organizacyjne profesora dr. inż. Mieczysława Felda, profesora zwyczajnego Politechniki Gdańskiej, wieloletniego Dyrektora Instytutu Technologii Budowy Maszyn na Wydziale Mechanicznym
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The need for new transport protocols on the INTERNET
PublicationThe TCP/IP protocol suite is widely used in IP networks, regardless of diverse environments and usage scenarios. Due to the fact of being the basic concept of organizing the work of the Internet, it is the subject of interest and constant analysis of operators, users, network researchers, and designers. The Internet is a "living" organism in which new needs appear all the time. This is particularly important due to the emerging...
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The need for linear revitalization. Gdynia case
PublicationThe aim of the article is to discuss the need of defining and implementation of the linear revitalization - the new approach related to the revitalization processes. The results of the preliminary investigations indicate that this kind of revitalization seems to be an important tool supporting city management and planning, especially in cases of cities fragmentation - causing lack of physical, social, economic and ecological cohesion....
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Composites in energy storing prosthetic feet
PublicationComposites reinforced with carbon and glass fibers have become the commonly used material in the production of energy storing prosthetic feet (ESPF/elastic feet prostheses). Their properties ensure a stable and light structure that allows for accumulation, storage and release of energy during walking, thus ensuring an increase in gait efficiency. Depending on the modification of the composite in terms of fiber selection, their...
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Rapeseed Meal Waste Biomass as Single-Cell Protein Substrate for Nutritionally-Enhanced Feed Component
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Theoretical and Actual Feed Per Tooth During Wood Sawing on an Optimizing Cross-Cut Saw
PublicationThe work presents the geometries of circular saw teeth, whose task is to divide the cross-cut of the cutting layer. For efficient machining on a cross-cut saw with high feed speed values (about 1 ms−1) maximal theoretical feeds per tooth are determined. These values were compared with the actual values determined during transverse cutting of pine wood on a special test stands in industrial conditions. In the experiment the rotational...
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The Impact of Cultivation Management and Weed Control Systems of Very Early Potato on Weed Infestation, Biodiversity, and Health Safety of Tubers
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Consumers’ Need of Privacy Protection – Experimental Results
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Tracking of the Multimodal Ordering Process in FePd Alloy
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Experiences with utilisation of sewage sludge in reed beds
PublicationHydrofitowa metoda utylizacji osadów ściekowych polega na stosowaniu wielowarstwowych nawodnień osadami o niskiej zawartości suchej masy najczęściej w złożach tzrcinowych. W metodzie tej odwadnianie spowodowane jest odciekaniem wód oraz ewapotransiracją. Osady ściekowe w złożach trzcinowych ulegaja częściowej stabilizacji i higienizacji. Złoża trzcinowe zapewniają wysoki stopień odwodnienia osadów.
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FEEDB: A multimodal database of facial expressions and emotions
PublicationIn this paper a first version of a multimodal FEEDB database of facial expressions and emotions is presented. The database contains labeled RGB-D recordings of people expressing a specific set of expressions that have been recorded using Microsoft Kinect sensor. Such a database can be used for classifier training and testing in face recognition as well as in recognition of facial expressions and human emotions. Also initial experiences...
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Dewatering of Sewage Sludge Dewatering in Reed Systems
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Internal friction in FePd alloy during ordering
PublicationStwierdzono występowanie wysokiego poziomu tarcia wewnętrznego w zahartowanym stopie FePd (50% at. Pd). Zbadano proces uporządkowania atomowego w korelacji ze zmianami tarcia wewnętrznego defektu modułu i relaksacji magnetycznej stopu porządkującego się podczas nagrzewania do 900 K. Zaobserwowano efekt prędkości nagrzewania na punkt Curie.
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Smart Weighing Scale with Feet-Sampled ECG
PublicationIn a smart home, health and well-being monitoring systems could be embedded in everyday devices providing a pervasive care. A home bathroom scale is an example of such a device, typically used to measure body weight and very often its composition (e.g. body water/fat percentage). In this paper, we analyzed a potential use of the bathroom scale to measure electrocardiogram (ECG) from electrodes located on the scale's tile. In particular...
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Excitation of Circularly Polarized Wave via Single-Feed Metasurface-Integrated Compact Antenna for Internet of Things
PublicationA compact circularly polarized (CP) quasi-omnidirectional antenna is introduced for internet of things (IoT). The structure consists of two components implemented on FR-4 substrates, and sep-arated by an air gap: one printed with a rectangular patch fed through a matching network, and another with a metasurface and a ground plane. Two different methods for impedance matching are employed. An equivalent circuit model of the antenna...
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Analysis of bisphenols and their derivatives in infant and toddler ready-to-feed milk and powdered milk by LC MS/MS
PublicationReady-to-feed milk and powdered milk packed in different types of packaging lined with resin are chosen as the primary or complementary diet for infants and toddlers. An HPLC–MS/MS method was established and validated for the determination of nineteen bisphenols and their derivatives in such samples. The recoveries were from 31% to 120%, while the values of limit of detection and quantification were in the range of 0.24–0.40 and...
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The influence of the basic conditions of the forced feed of abrasive compound on the roughness of flat ceramic elements after lapping.
PublicationW docieraniu standardowym zawiesina ścierna dostarczana jest do strefy obróbki w sposób ciągły - zalewowo lub kroplowo, co generuje duże straty ścierniwa. W artykule opisano innowacyjny system dozowania i nanoszenia zawiesiny ściernej na powierzchnię żeliwnego docieraka tarczowego, który eliminuje tą wadę. W przeprowadzonych eksperymentach badano wpływ procentowej zawartości ziaren ściernych w nośniku oraz wielkość dawki zawiesiny...
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Operation of reed systems used to stabilization of sewage sludge
PublicationThe aim of this research was to determine the parameters of property operation of reed systems. It was also checked the possibility to use sludge in agriculture for the sake of heavy metal concentrations.The research was conducted in four Danish objects utilized sludge located in Helsinge, Vallo, Rudkobing and Nakskov near Copenhagen.It was found that correct operation of reed basins requires the determination of optimal doses...
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Green aspects of sample preparation - a need for solvent reduction
PublicationWzrastające zainteresowanie ochroną środowiska zmusza chemików, łącznie z chemikami analitykami, do modyfikacji chemicznej aktywności w taki sposób aby była ona prowadzona zgodnie z zasadami zielonej chemii. W artykule przedstawiono przegląd problemów zielonej chemii w dziedzinie przygotowania próbek do analizy, koncentrując się szczególnie na zaletach tzw. bezrozpuszczalnikowych technik przygotowania próbek. Przedstawiono techniki...
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Structural and magnetic properties of Cu-alloyed FePd films
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Photoinduction of Seed Germination in Arabidopsis Thaliana is Modulated by Phototropins
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An extension to the FEEDB Multimodal Database of Facial Expressions and Emotions
PublicationFEEDB is a multimodal database that contains recordings of people expressing different emotions, captured by using a Microsoft Kinect sensor. Data were originally provided in the device’s proprietary format (XED), requiring both the Microsoft Kinect Studio application and a Kinect sensor attached to the system to use the files. In this paper, we present an extension of the database. For a selection of recordings, we also provide...
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Polish experience in operation of sludge treatment reed beds
PublicationSludge Treatment Reed Beds (STRBs) is the technology of sludge treatment, which is based on natural processes occurring in the environment, in specially designed and operated facilities to achieve benefits for the environment. Integrated dewatering and stabilization occur in reed systems. For economic and environmental reasons it is an attractive solution, especially in rural areas where there are no appropriate facilities. In...
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Double Fed Induction Machine Drives
PublicationContents of the Chapter 22:Machine model.Properties of the DFM.Steady state machine operation.Control rules and decoupled control.Decoupling based on MM machine model.Decoupling based on vector model.Decoupling based on rotor current equation.Overall control system.Control system based on MM model.Control system based on vector model.Estimation of variables.Calculation of the angle between stator and rotor.Remarks about digital...
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Current Source Inverter Fed Drive
PublicationThis book covers three-phase and multiphase (more than three-phase) motor drives including their control and practical problems faced in the field (e.g., adding LC filters in the output of a feeding converter), are considered. The new edition contains links to Matlab®/Simulink models and PowerPoint slides ideal for teaching and understanding the material contained within the book. Readers will also benefit from the inclusion of: A...
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Influence of feed rate on the granularity and homogenity of oak sawdust obtained during the sawing process on the frame sawing machine PRW15M
PublicationOpisano wpływ prędkości posuwu na skład granulometryczny i jednorodność trocin dębowych otrzymanych podczas procesu przecinania na pilarce ramowej PRW15M. Wykazano, że otrzymane trociny mogą być wykorzystane w produkcji produktów drewnopochodnych w ilości 75% dla posuwu 0.36 m/min i 82% przy posuwie 1.67 m/min. Pozostałe trociny stanowią odpad.
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The type of blood used to feed Aedes aegypti females affects their cuticular and internal free fatty acid (FFA) profiles
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Future opportunities for products derived from black soldier fly (BSF) treatment as animal feed and fertilizer - A systematic review
PublicationThe pursuit of novel food products with good nutritional value for both direct and indirect human consumption is crucial. Given the nutritional benefits of insects and the sustainability of this sort of farming, using them as food for farmed animals is a promising alternative. In this regard, the black soldier fly (Hermetia illucens) is most capable of efficiently converting a wide variety of organic materials, from food waste...
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Effect of Genetically Modified Feeds on Physico-Chemical Properties of Pork
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Assessment of the Impact of Loss-of-Retention Fees on Green Infrastructure Investments
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The quality of sewage sludge stabilized for a long time in reed basins
PublicationThe aim of the work was to determine changes of long-term sewage sludge quality stabilized in reed basins from 7-15 years. The following parameters were evaluated: dry matter and organic matter concentration, nitrogen, phosphorus, and selected heavy metal (Cd, Ni, Pb, Cr, Cu, Zn) fractions. The material for the investigations was collected from 4 reed basin systems (utilisated sewage sludge) located in conventional WWTPs in Denmark...
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Different Modes of Hydrogen Peroxide Action During Seed Germination
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Seed Priming: New Comprehensive Approaches for an Old Empirical Technique
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AFM, XRD and HRTEM studies of annealed FePd thin films
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Do we need a new classification of parotid gland surgery?
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