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    Wyświetlanie 1-12 z 12
    Tytuł:
    Modular intelligent fixture system for flexible clamping of large parts
    Autorzy:
    Möhring, H.-C.
    Gessler, W.
    König, A.
    Nguyen, L. T.
    Nguyen, Q. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/100187.pdf
    Data publikacji:
    2017
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    machine tool
    modular fixture
    hybrid material
    intelligent system
    Opis:
    In this work a modular intelligent fixture system for flexible clamping of large parts is presented. The fixture modules consist of a hybrid material structure involving metal frame elements and mineral casting. These modules can be combined and connected to realize fixtures adapted to the geometry of the workpiece and requirements of the machining processes. By integrated pipes and interfaces, an internal hydraulic supply and active cooling is possible even for combined modules. Temperature and acceleration sensors allow for an active thermal control and process monitoring. The modules and first test fixtures are investigated in experiments.
    Źródło:
    Journal of Machine Engineering; 2017, 17, 4; 29-39
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation aided design of intelligent machine tool components
    Autorzy:
    Mohring, H. C.
    Wiederkehr, P.
    Leopold, M.
    Nguyen, L. T.
    Hense, R.
    Siebrecht, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/100035.pdf
    Data publikacji:
    2016
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    characteristic diagram based correction
    structure model based correction
    thermoelastic deformation
    online enabled TCP correction machine tool
    intelligent component
    process simulation
    layout methodology
    Opis:
    By integrating sensors and actuators, intelligent machine tool components can be realized, which allow the monitoring of machining processes and machine tool states and an active influencing of process conditions. In the design and layout of these intelligent machine tool components, their mechanical structure and the functional performance of the sensor and actuator sub-systems have to be optimized. As an example, a sensor and actuator integrated fixture system for clamping large but sensitive aerospace structural parts is presented here. In order to investigate the major influences of design approaches on the behaviour of the workpiece and fixture, especially with respect to vibrations and process stability during milling, multiple test rigs and prototypes for basic analyses and machining tests were developed and realized. Experimental and Finite Element Analysis (FEA) results are presented and discussed. Process simulations were conducted taking the dynamic behaviour of the clamped workpiece at different processing steps into account. This simulation can be used for predicting the limits of the process stability. An approach of sensor and actuator integration is described and test results are shown. The paper introduces a principle design and layout methodology for similar intelligent machine tool components.
    Źródło:
    Journal of Machine Engineering; 2016, 16, 3; 5-33
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cultural characteristics and cordycepin production of some Cordyceps militaris strains under artificial cultivation conditions
    Autorzy:
    Nguyen, L.T.
    Le, V.V.
    Nguyen, B.T.T.
    Ngo, N.X.
    Nguyen, H.T.T.
    Nguyen, Q.D.
    Mulla, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2096987.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Cordyceps militaris
    mycelial
    fruiting body
    cordycepin
    Opis:
    Cordyceps militaris, a precious medical mushroom, has attracted wide attention in industrial fields. Currently, the degeneration phenomenon of C. militaris commercial strains is amongst the major challenges for cultivation at the industrial scale. The screening for superior strains with high yield and medicinal value is considered a realistic approach to overcome degeneration problems. In the present study, the mycelial growth, primordia formation, yield performance, and cordycepin content of five strains (DT1, DT2, DT3, DT4, and DT5) under artificial cultivation conditions were investigated. All strains showed mycelial growth on SDAY and liquid medium. The strains were successfully cultivated in brown rice medium and required 18 (strain DT3) to 25 days (strain DT5) to form primordia. Additionally, morphological characteristics of fruiting bodies varied among the strains. Strains DT4 and DT3 exhibited the highest fruiting body length with 74.23 ± 5.13 mm and 72.63 ± 2.62 mm, respectively whereas the highest diameter was recorded for strains DT1 (4.05 ± 0.18 mm) and DT2 (3.63 ± 0.12 mm). Of note, among the investigated strains, strain DT3 exhibited the highest biological efficiency (8.95 ± 0.07%) and cordycepin content (1.68 mg/g). Therefore, strain DT3 could be selected as a potential strain for commercial cultivation.
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2020, 101, 2; 135-145
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A model for the inverse 1-median problem on trees under uncertain costs
    Autorzy:
    Nguyen, K. T.
    Chi, N. T. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/254814.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    location problem
    uncertain variable
    inverse optimization problem
    tree
    Opis:
    We consider the problem of justifying vertex weights of a tree under uncertain costs so that a prespecified vertex become optimal and the total cost should be optimal in the uncertainty scenario. We propose a model which delivers the information about the optimal cost which respect to each confidence level α ∈ [0,1]. To obtain this goal, we first define an uncertain variable with respect to the minimum cost in each confidence level. If all costs are independently linear distributed, we present the inverse distribution function of this uncertain variable in [formula]time, where n is the number of vertices in the tree.
    Źródło:
    Opuscula Mathematica; 2016, 36, 4; 513-523
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ekonomiczne kryterium wyboru sposobu wzbogacania miałów węgla koksowego
    Economic criterion of choosing the way of coking coal fines beneficiation
    Autorzy:
    Blaschke, W.
    Nguyen, T. T. L.
    Czarny, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/283715.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    węgiel koksowy
    wzbogacanie
    efekty ekonomiczne
    coking coal
    beneficiation
    economic effects
    Opis:
    Miały węgla koksowego wzbogacane są w osadzarkach miałowych lub w cyklonach cieczy ciężkiej. Wybór urządzeń wzbogacających zależy od inwestora lub od projektantów zakładu przeróbczego.W Polsce preferowane są osadzarki, w innych krajach (np. w Australii, USA, RPA) stosowane są głównie cyklony cieczy ciężkiej. W artykule przeprowadzono analizę wzbogacania dwóch przykładowych węgli w urządzeniach o różnej dokładności rozdziału ocenianej wskaźnikami imperfekcji. Pokazano różnice w efektach ekonomicznych wynikające z dokładności wzbogacania. Zwrócono uwagę na wpływ charakterystyk technologicznych węgli (krzywe wzbogacania) na uzyskiwane rezultaty wzbogacania przy założonych parametrach jakościowych koncentratów węgli koksowych. Stwierdzono, że wybór sposobu wzbogacania (osadzarki czy cyklony c.c.) powinien być oparty na analizie uzyskiwanych, dla konkretnych węgli, efektów ekonomicznych wzbogacania.
    Coking coal fines are beneficiated in jigs or in dense media cyclones. The choice beneficiation equipment depends on investor or preparation plant design engineer. In Poland jigs are preferred while in other countries (like Australia, United States, South Africa) mainly dense media cyclones are used. Beneficiation of two exemplary coals in equipment of different accuracy of separation, measured by imperfection factors, has been analysed in the paper. Different economic effects resulting from beneficiation accuracy has been shown. Attention has been put on the impact of coal technological characteristics (washability curves) on beneficiation effects achieved at assumed quality parameters of coking coal concentrates. It has been stated that the choice of beneficiation method (jigs or dense media cyclones) should be based on economic effects for specific (given) coals.
    Źródło:
    Polityka Energetyczna; 2009, T. 12, z. 2/2; 29-41
    1429-6675
    Pojawia się w:
    Polityka Energetyczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Erosion and deposition processes from field experiments of hydrodynamics in the coastal mangrove area of Can Gio, Vietnam
    Autorzy:
    Nguyen, H.T.L.
    Luong, H.P.V.
    Powiązania:
    https://bibliotekanauki.pl/articles/48128.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    hydrodynamics
    erosion process
    depositional process
    field experiment
    mangrove area
    suspended sediment concentration
    Can Gio area
    Vietnam
    Źródło:
    Oceanologia; 2019, 61, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Separator taśmowy - modyfikacja stołów taśmowych typu Vanner zastosowana w Wietnamie
    Belt separator – Vanner type separators modification introduced in Vietnam
    Autorzy:
    Mijał, W.
    Nguyen, N.P.
    Pham, V.L.
    Tran, T.T
    Phung, T.T.
    Pham, T.H.
    Nguyen, H.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/166768.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Górnictwa
    Tematy:
    separator taśmowy
    separator typu Vanner
    węgiel kamienny
    wzbogacanie węgla
    próby wzbogacania
    górnictwo wietnamskie
    belt separator
    Vanner type separator
    hard coal
    coal beneficiation
    beneficiation tests
    Vietnam’s mining industry
    Opis:
    Separatory typu Vanner były stosowane głównie do wzbogacania rud takich jak: miedź, ołów, złoto itp.. Konstrukcja tego urządzenia była nietypowa, gdyż był to stół taśmowy, na którym następował rozdział materiału, podobnie jak na klasycznym stole koncentracyjnym. Urządzenie o podobnej konstrukcji jest stosowane do przeróbki węgla kamiennego w wietnamskim przemyśle wydobywczym. Hanoi University of Mining and Geology przeprowadzał wiele testów dla zastosowania tego urządzenia, a w niniejszym artykule zostanie przedstawiona część wyników, jakie uzyskiwano podczas projektowania węzła technologicznego dla węgla płukanego w zakładach Vang Danh i Uong Bi o uziarnieniu 3-20 mm.
    Vanner type separators were mainly used to enrich ores such as copper, lead, gold, etc. The construction of this device was atypical, because it was a belt table on which the material was separated like on a classic concentration table. A device of similar construction is used for processing hard coal in the Vietnam’s mining industry. Hanoi University of Mining and Geology has carried out many tests for the use of this device, and this paper presents some of the results obtained during the design of the technological node for the rinsed coal at the Vang Danh and Uong Bi plants with a grain size of 3-20 mm.
    Źródło:
    Przegląd Górniczy; 2018, 74, 5; 42-47
    0033-216X
    Pojawia się w:
    Przegląd Górniczy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of Lycopene Extraction from Tomato Pomace and Effect of Extract on Oxidative Stability of Peanut Oil
    Autorzy:
    Tran, Dinh T.
    Nguyen, Lan T.
    Nguyen, Cuong N.
    Hertog, Maarten L.
    Nicolaï, Bart
    Picha, David
    Powiązania:
    https://bibliotekanauki.pl/articles/16538548.pdf
    Data publikacji:
    2023-07-05
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    Antioxidant
    Response surface methodology
    Optimization
    Lycopene
    Extraction
    Peanut oil stability
    Opis:
    Lycopene, the pigment principally responsible for the red color of tomatoes, is well-known for its strong antioxidant property and substantial health benefits. In this study, the optimal combination of factors for lycopene extraction from tomato pomace was identified using response surface methodology. The best practically feasible results maximizing both lycopene yield and antioxidant activity of the extract were obtained by applying a ratio of ethyl acetate to tomato waste of 35:1 (v/w), at a temperature of 55ºC for 100 min of extraction. The extract was then added to the peanut oil to evaluate its oxidative stability during 60 days of storage at 40ºC. It was shown that the addition of 2 g extract/kg oil offered the lowest level of peroxide value, p-anisidine value, and total oxidation value, followed by the oils with 50 mg butylated hydroxytoulene/kg oil and 1 g extract/kg oil, indicating the effect of lycopene-rich extract on enhancing the oxidative stability of peanut oil. The results in this study suggest that incorporation of extract rich in lycopene from tomato waste products may be an effective method to reduce oxidation and extend the shelf-life of peanut and other vegetable oils.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 2023, 73, 3; 205-213
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forecasting Stock Price using Wavelet Neural Network Optimized by Directed Artificial Bee Colony Algorithm
    Autorzy:
    Khuat, T. T.
    Le, Q. C.
    Nguyen, B. L.
    Le, M. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/308651.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    Artificial Bee Colony algorithm
    Artificial Neural Network
    back-propagation algorithm
    stock price forecasting
    wavelet transform
    Opis:
    Stock prediction with data mining techniques is one of the most important issues in finance. This field has attracted great scientific interest and has become a crucial research area to provide a more precise prediction process. This study proposes an integrated approach where Haar wavelet transform and Artificial Neural Network optimized by Directed Artificial Bee Colony algorithm are combined for the stock price prediction. The proposed approach was tested on the historical price data collected from Yahoo Finance with different companies. Furthermore, the prediction result was found satisfactorily enough as a guide for traders and investors in making qualitative decisions.
    Źródło:
    Journal of Telecommunications and Information Technology; 2016, 2; 43-52
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Isolation and characterization of a DREB homolog gene from a local drought-tolerant maize cultivar
    Autorzy:
    Huynh, T.T.H.
    Nguyen, T.L.
    Luu, H.L.
    Nguyen, H.H.
    Le, H.D.
    Bui, M.M.
    Pham, T.H.
    Doan, T.B.T.
    Le, T.T.H.
    Ha, H.H.
    Nong, V.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2117848.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    drought tolerance
    maize
    transformation
    DrEB gene
    Tevang-1 cultivar
    Opis:
    Clarifying the genetic background of the drought-tolerance trait is a crucial task that may help to improve plant performance under stress by a genetic engineering approach. dehydration-responsive element-binding protein (dREB) is a transcription factor family which modulates many stress-responsive genes. In this study, we isolated a DrEB homolog gene named ZmDrEBtv from Zea mays var. Tevang-1. Using bioinformatic tools, a number of Indels and SNPs in ZmDrEBtv sequence different from the reference accession were identified. In addition, based on deduced protein sequence similarity, ZmdREBtv was assigned to transcription factor dREB2 class as featured by a conserved dNa binding domain – aP2. The ZmDrEBtv construct under thecontrol of the rd29a promoter was transformed into a drought-sensitive maize plant, K7 line. The transgenic plants were assessed with reference to molecular and phenotypic characteristics related to the drought-tolenrance trait. The results proved that the maize plants carrying ZmDrEBtv gene showed enhanced tolerance and better performance to the water-deficit environment at different stages, compared to the wild-type plants.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2019, 61, 2; 13-24
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Induction, growth and paclitaxel content of needle- and petiole-derived calli in Himalayan yew (Taxus wallichiana Zucc.) under light-emitting diodes
    Autorzy:
    Nhut, D.T.
    Nguyen, P.L.H.
    Don, N.T.
    Hien, N.T.T.
    Huy, N.P.
    Nam, N.B.
    Vinh, B.T.
    Luan, T.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/19361.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2014, 56, 2
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Software Startups – A Research Agenda
    Autorzy:
    Unterkalmsteiner, M.
    Abrahamsson, P.
    Wang, X. F.
    Nguyen-Duc, A.
    Shah, S.
    Bajwa, S. S.
    Baltes, G. H.
    Conboy, K.
    Cullina, E.
    Dennehy, D.
    Edison, H.
    Fernandez-Sanchez, C
    Garbajosa, J.
    Gorschek, T.
    Klotins, E.
    Hokkanen, L.
    Kon, F.
    Lunesu, I.
    Marchesi, M.
    Morgan, L.
    Oivo, M.
    Selig, C.
    Seppänen, P.
    Sweetman, R.
    Tyrväinen, P.
    Ungerer, C.
    Yagüe, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/953060.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    software startup
    research agenda
    software-intensive systems
    Opis:
    Software startup companies develop innovative, software-intensive products within limited time frames and with few resources, searching for sustainable and scalable business models. Software startups are quite distinct from traditional mature software companies, but also from micro-, small-, and medium-sized enterprises, introducing new challenges relevant for software engineering research. This paper’s research agenda focuses on software engineering in startups, identifying, in particular, 70+ research questions in the areas of supporting startup engineering activities, startup evolution models and patterns, ecosystems and innovation hubs, human aspects in software startups, applying startup concepts in non-startup environments, and methodologies and theories for startup research. We connect and motivate this research agenda with past studies in software startup research, while pointing out possible future directions. While all authors of this research agenda have their main background in Software Engineering or Computer Science, their interestin software startups broadens the perspective to the challenges, but also to the opportunities that emerge from multi-disciplinary research. Our audience is therefore primarily software engineering researchers, even though we aim at stimulating collaborations and research that crosses disciplinary boundaries. We believe that with this research agenda we cover a wide spectrum of the software startup industry current needs.
    Źródło:
    e-Informatica Software Engineering Journal; 2016, 10, 1; 89-123
    1897-7979
    Pojawia się w:
    e-Informatica Software Engineering Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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