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Tytuł:
Succession of coral associations during a Givetian transgressive-regressive cycle in Queensland
Autorzy:
Zhen, Y Y
Powiązania:
https://bibliotekanauki.pl/articles/22955.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Calceola
sedymentacja
Disphyllum
koralowce
piaskowce wapniste
zbiorniki morskie
stromatopory
Grypophyllum
Endophyllum columna
korale
paleontologia
Chostophyllum
korale czteropromienne
dewon
Dendrostella trigemme
Opis:
The small solitary coral dominated, Grypophyllum-Chostophyllum association, a pioneer coral community, is widely distributed at the base of the Givetian Burdekin Formation of north Queensland in the mixed arkose-carbonate sediments. It is succeeded by fasciculate coral dominated, Dendrostella trigemne association, which is mainly associated with wackestone or bioclastic calcirudite of inner shelf, lagoonal or protected environments. The Australophyllum-Sanidophyllum association, Blysmatophyllunt-Iotuaphgllum schlueteri association, and Spongophgllstm association, all dominated by in situ, large massive coral colonies, formed biostromal deposits on the margins of the basin. They developed in nearshore environments during the maximum flooding in the region. The Aphyllum salmoni-Stringophgllum (Neospongophyllum) bipartitum association indicates relatively deeper, mid-outer shelf environments connected with maximum flooding in the depocentre and least terrigenous influx. The massive coral dominated Endophyllum columna-Stringophyllum (Stringophyllum) isactis association, developed in the initial regressive phase, forms a distinctive biostromal unit at the top of the Burdekin Formation. The Lekanophyllum association developed at the base of the Cultivation Gully Formation in a very shallow nearshore environment with a large terrigendus influx as a result of the basin wide, relatively rapid regression. It is characterised by the abundant occurrence of solitary corals and large sized, cerioid Endophyllum columna, which often formed micro-atolls. Rugose corals were better adapted than stromatoporoids to survive of mud inllux.
Kopalny zapis środkowodewońskiejj transgresji morskiej (maximum we wczesnym żywecie) w północnej części stanu Queensland pozwala na prześledzenie sukcesji zespołów koralowców w miarę rozwoju i zaniku zbiornika morskiego. Pierwsze korale pojawiły się w tym regionie podczas sedymentacji wapnistych piaskowców w stropie Big Bend Arkose. Dominują w tym zespole pojedyncze korale Grypophyllum i Chostophyllum; występuje tam również swobodnie leżąca na dnie Calceola. Jest to epoka największego zróżnicowania gatunkowego korali, ale większość z nich to formy pojedyncze, z niewielkim udziałem gałązkowych. Pełnomorskim warunkom niewątpliwie odpowiada nadległa formacja Burdekin, sięgająca 500 m miąższości. Udział korali pojedynczych zmniejsza się stopniowo (wraz z tym i zróżnicowanie taksonomiczne zespołów), pojawiają się natomiast masywne kolonie. Biostromy z koralami i stromatoporami rozprzestrzeniały się w jej trakcie ku obszarom uprzednio przybrzeżnym. Stadium transgresywne reprezentuje dolna część formacji z koralami Dendrostella trigemme i Disphgllum; stadium regresywne część górna z koloniami. Endophyllum columna; w obydwu spory udział mają korale o masywnych koloniach. Pośrodku występuje zespół maximum transgresji zdominowany przez korale pojedyncze i gałązkowe. Korale, glony i stromatopory były głównym źródłem osadu wapiennego. Zapis regresji kontynuuje nadległa formacja Cultivation Gully, złożona z wapiennych mułowców, łupków i drobnoziarnistych piaskowców, odpowiadająca stosunkowo szybkiej fazie regresywnej. Dopływ terrygenicznego materiału klastycznego był głównym czynnikiem, który doprowadził do zaniku sedymentacji węglanowej na szelfie. Korale czteropromienne stosunkowo lepiej od stromatopor znosiły dopływ piasku i mułu, tworząc małe biostromy nawet w płytkich przybrzeżnych środowiskach piaszczystych.
Źródło:
Acta Palaeontologica Polonica; 1996, 41, 1; 59-88
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of autonomous distributed manufacturing systems (ADiMS) concept and example of its application in the casting industry
Autorzy:
Martawirya, Y. Y.
Powiązania:
https://bibliotekanauki.pl/articles/246966.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
manufacturing systems
application software
casting industry
autonomous holon
Opis:
This research deals with the development of Autonomous Distributed Manufacturing Systems (ADiMS) Concept and an example of its application in the casting industry. ADiMS is a manufacturing system concept developed to increase the flexibility of the system. In ADiMS, each of the manufacturing system elements (holon) had been modelled as an intelligent element with the result that each element had capability to manage Information, communicate each other, and to make decision. The whole manufacturing problems arę solved by each element and coordination among them. In the modelling at the developed application software, UML (Unified Modelling Language) was used, where each element of manufacturing system was modelled as a class as in the Object Oriented Programming (OOP) concept. As a case study, the development of the concept analysis and application software to manage casting industry, that has a piston ring as its main product, was carried out. The application software that had been developed, that still in aproto type stage, has five main functions that are an order management system, Quality Assurance, Warehouse management, Jig & Fixture Storage Area management, and Sand Casting Area management functions. Inside each function, there are several objects that working together with coordination among each others. The application showed that all main functions can make communication through the database server. The developed application that discussed at this research has a client - server technology. The same web-based system with the n-tier technology is still in the development stage now.
Źródło:
Journal of KONES; 2010, 17, 2; 299-307
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of thermodynamic mechanism of interfacial adsorption on purifying air-conditioning engineering under intensification of electric field
Autorzy:
Chen, Y.-Y.
Powiązania:
https://bibliotekanauki.pl/articles/240795.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
interfacial adsorption
thermodynamics
Gibbs
purifying air-conditioning engineering
electric field
adsorpcja międzyfazowa
termodynamika
oczyszczanie
klimatyzacja
pole elektryczne
Opis:
As a kind of mass transfer process as well as the basis of separating and purifying mixtures, interfacial adsorption has been widely applied to fields like chemical industry, medical industry and purification engineering in recent years. Influencing factors of interfacial adsorption, in addition to the traditional temperature, intensity of pressure, amount of substance and concentration, also include external fields, such as magnetic field, electric field and electromagnetic field, etc. Starting from the point of thermodynamics and taking the Gibbs adsorption as the model, the combination of energy axiom and the first law of thermodynamics was applied to boundary phase, and thus the theoretical expression for the volume of interface absorption under electric field as well as the mathematical relationship between surface tension and electric field intensity was obtained. In addition, according to the obtained theoretical expression, the volume of interface absorption of ethanol solution under different electric field intensities and concentrations was calculated. Moreover, the mechanism of interfacial adsorption was described from the perspective of thermodynamics and the influence of electric field on interfacial adsorption was explained reasonably, aiming to further discuss the influence of thermodynamic mechanism of interfacial adsorption on purifying air-conditioning engineering under intensification of electric field.
Źródło:
Archives of Thermodynamics; 2016, 37, 4; 105-119
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and simulation of an air conditioning project in a hospital based on computational fluid dynamics
Plan i symulacja projektu klimatyzacji w szpitalu, na podstawie obliczeniowej mechaniki płynów
Autorzy:
Ding, X. R.
Guo, Y. Y.
Chen, Y. Y.
Powiązania:
https://bibliotekanauki.pl/articles/230580.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
szpital
sala operacyjna
klimatyzacja
mechanika płynów
CFD
symulacja numeryczna
model turbulencji
projekt
hospital
operating room
air conditioning
fluid mechanics
numerical simulation
turbulence model
design
Opis:
This study aims to design a novel air cleaning facility which conforms to the current situation in China, and moreover can satisfy our demand on air purification under the condition of poor air quality, as well as discuss the development means of a prototype product. Air conditions in the operating room of a hospital were measured as the research subject of this study. First, a suitable turbulence model and boundary conditions were selected and computational fluid dynamics (CFD) software was used to simulate indoor air distribution. The analysis and comparison of the simulation results suggested that increasing the area of air supply outlets and the number of return air inlets would not only increase the area of unidirectional flow region in main flow region, but also avoid an indoor vortex and turbulivity of the operating area. Based on the summary of heat and humidity management methods, the system operation mode and relevant parameter technologies as well as the characteristics of the thermal-humidity load of the operating room were analyzed and compiled. According to the load value and parameters of indoor design obtained after our calculations, the airflow distribution of purifying the air-conditioning system in a clean operating room was designed and checked. The research results suggested that the application of a secondary return air system in the summer could reduce energy consumption and be consistent with the concept of primary humidity control. This study analyzed the feasibility and energy conservation properties of cleaning air-conditioning technology in operating rooms, proposed some solutions to the problem, and performed a feasible simulation, which provides a reference for practical engineering.
Przedmiotem tego badania była czysta sala operacyjna. Zastosowano technologię czystej klimatyzacji. Obciążenie chłodnicze czystej klimatyzacji w okresie letnim zostało obliczone przy użyciu praktycznej metody obciążenia chłodniczego klimatyzacji oraz oprogramowania służącego do obliczania zużycia energii. Wyniki obliczeń zostały porównane i przeanalizowane. Model rozprowadzania powietrza był symulowany za pomocą Airpak 3.0, a symulowane wyniki zostały przeanalizowane.
Źródło:
Archives of Civil Engineering; 2017, 63, 2; 23-38
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wrażenia z Rosji
Autorzy:
(y.).
Powiązania:
Gazeta Polska. Dziennik Informacyjny Polaków na Bliskim Wschodzie 1942, nr 117, s. 3
Data publikacji:
1942
Tematy:
Polskie Siły Zbrojne w ZSRR (1941-1942)
Układ Sikorski-Majski (1941)
Polacy
II wojna światowa (1939-1945)
Umowa międzynarodowa
Opis:
Na marginesie art. J. Szczyrka zamieszcz. w "Robotnik Polski" (Londyn). - 1942, 15 III. Także apel o pomoc dla Polaków w ZSRR.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Network representation of the game of life
Autorzy:
Kayama, Y.
Imamura, Y.
Powiązania:
https://bibliotekanauki.pl/articles/91565.pdf
Data publikacji:
2011
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
Game of Life
Life
network representation
network theory
Life pattern
clustered network
Wolfram’s class IV rule
Opis:
The Game of Life (Life) is one of the most famous cellular automata. The main purpose of this article is to present a network representation of Life as an application of the approach proposed in our previous papers. This network representation has made it possible to investigate Life using a network theory. Some well-known Life patterns are illustrated by using the corresponding clustered networks. The visualization of Life’s rest state reveals the underlying tension as a complex network. The typical network parameters show the characteristics of Life as a Wolfram’s class IV rule. In particular, the in-degree distribution of the derived network from a Life’s rest state shows a scale-free nature, which could be related to the evidence of self-organized criticality.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2011, 1, 3; 233-240
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Operators in divergence form and their Friedrichs and Krein extensions
Autorzy:
Arlinskii, Y.
Kovalev, Y.
Powiązania:
https://bibliotekanauki.pl/articles/254828.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
symmetric operator
divergence form
Friedrichs extension
Krein extension
Opis:
For a densely defined nonnegative symmetric operator A = L*(2)L1 in a Hilbert space, constructed from a pair L1 ⊂ L2 of closed operators, we give expressions for the Friedrichs and Krein nonnegative selfadjoint extensions. Some conditions for the equality (L*(2)L1)* = L*(1)L2 are obtained. Applications to 1D nonnegative Hamiltonians, corresponding to point interactions, are given.
Źródło:
Opuscula Mathematica; 2011, 31, 4; 501-517
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cyclical reverse thermosiphon
Autorzy:
Dobriansky, Y.
Yohanis, Y.
Powiązania:
https://bibliotekanauki.pl/articles/240851.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cyrkulacja cieczy
obieg
termosyfon odwrotny
wymiana ciepła
Liquid circulation loop
Passive heat transfer downward
reverse thermosiphon
Opis:
We describe the development of a new type of heat exchanger. This heat exchanger operates using reverse thermosiphon action and consists of a self-acting and self-controlled liquid circulation loop with heat transfer in a downward direction, opposite to the direction of natural convection. This process moves a heat-carrying hot liquid downwards with the help of local heat transferred through the loop. This flow loop is partly filled with liquid and the upper part of the loop contains vapour from the liquid heat-carrier. The pressure difference in the saturated vapour is used to move the heated liquid downwards. The principles of action and the possibility of developing such a device using laboratory experimental methods are presented.
Źródło:
Archives of Thermodynamics; 2010, 31, 1; 3-32
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Auto mission planning system design for imaging satellites and its applications in environmental field
Autorzy:
He, Y.
Wang, Y.
Chen, Y.
Xing, L.
Powiązania:
https://bibliotekanauki.pl/articles/258754.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
systems engineering
imaging satellite
meteorological monitoring
space-ground integration
Opis:
Satellite hardware has reached a level of development that enables imaging satellites to realize applications in the area of meteorology and environmental monitoring. As the requirements in terms of feasibility and the actual profit achieved by satellite applications increase, we need to comprehensively consider the actual status, constraints, unpredictable information, and complicated requirements. The management of this complex information and the allocation of satellite resources to realize image acquisition have become essential for enhancing the efficiency of satellite instrumentation. In view of this, we designed a satellite auto mission planning system, which includes two sub-systems: the imaging satellite itself and the ground base, and these systems would then collaborate to process complicated missions: the satellite mainly focuses on mission planning and functions according to actual parameters, whereas the ground base provides auxiliary information, management, and control. Based on the requirements analysis, we have devised the application scenarios, main module, and key techniques. Comparison of the simulation results of the system, confirmed the feasibility and optimization efficiency of the system framework, which also stimulates new thinking for the method of monitoring environment and design of mission planning systems.
Źródło:
Polish Maritime Research; 2016, S 1; 59-70
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ecological Compensation Standard for Non-point Pollution from Farmland
Propozycja standardu ekologicznej kompensacji dla obszarowych zanieczyszczeń z rolnictwa
Autorzy:
Zhang, Y.
Ji, Y.
Zhou, Y.
Sun, H.
Powiązania:
https://bibliotekanauki.pl/articles/371753.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Komitet Człowiek i Środowisko PAN
Tematy:
ecological compensation standard
nitrogen
non-point pollution
optimal ecological economic nitrogen application amount
standard kompensacji ekologicznej
azot
obszarowe źródła zanieczyszczeń
optymalna ekologicznie ilość stosowanego azotu
Opis:
Non-point source water pollution mainly comes from farmland chemical fertilizers which has become an obstacle of agricultural sustainability and ecological health. As a public policy tool for assessing global ecological crisis and environmental pollution, ecological compensation is important for regional agricultural sustainability. Ecological compensation that farmers receive from governments is based on their reduction of fertilizer application at optimal ecological and economic levels. In this study we estimated the ecological compensation standards for nitrogen non-point pollution in Yixng city with contingent valuation method and cost-benefit method. Results showed that the range of theoretical values of ecological compensation of nitrogen in Yixing City depended upon its optimal ecological and economic nitrogen application levels. The willingness of farmers to accept the compensation was positively correlated with their farming experience and education. There were about half of farmers willing to accept the compensation. Based on the present study, we found Yixing’s ecological compensation standard for controlling nitrogen non-point pollution was 620.0 yuan/hm2 at the current economic development level.
Obszarowe zanieczyszczeń wód z rolnictwa pochodzą ze stosowania nawozów sztucznych, stanowiących prze-szkodę na drodze do osiągnięcia rolniczej zrównoważoności i równowagi ekologicznej. W tym kontekście ekologiczna kompensacja, stanowiąca narzędzie polityczne do oceny kryzysu ekologicznego i ogólnego poziomu zanieczyszczenia środowiska, okazuje się także ważna w wymiarze lokalnej zrównoważoności rolniczej. Wysokość świadczeń, które rolniczy dostają od władz, jest uwarunkowana poziomem redukcji stosowania nawozów, którego celem jest osiągnięcie poziomu optymalnego zarówno zer strony ekologicznej, jak i ekonomicznej. W tym artykule, przy pomocy Metoda wyceny warunkowej i metody kosztów i korzyści, ustaliliśmy standardy ekologicznej kompensacji dla miasta Yixng. Otrzymane rezultaty pozwalają na stwierdzenie, że zakres teoretycznych wartości ekologicznej kompensacji dla azotu w Yixing zależy od ustalenia optymalnych ekologicznych i ekonomicznych pozimów stosowania azotu. Zainteresowanie rolników otrzymaniem odszkodowania okazało się być pozytywnie skorelowane z ich doświadczeniem rolniczym i poziomem wykształcenia. Chęć jego otrzymania zgłosiła połowa z nich. Ustaliliśmy ponadto, że standard ekologicznej kompensacji dla Yixing odnoszący się kontrolowania ob-szarowych zanieczyszczeń związanych z nawozami azotowymi wynosi 620.0 yuan/hm2 , przy założeniu obecnego poziomu rozwoju ekonomicznego.
Źródło:
Problemy Ekorozwoju; 2017, 12, 1; 139-146
1895-6912
Pojawia się w:
Problemy Ekorozwoju
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Expression of the highly pathogenic porcine reproductive and respiratory syndrome virus (HP-PRRSV) in various types of cells in thymic tissues
Autorzy:
Liu, Q.
Yu, Y.-Y.
Wang, H.-Y.
Powiązania:
https://bibliotekanauki.pl/articles/16539177.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
pig
thymus
highly pathogenic porcine reproductive and respiratory syndromevirus
immunofluorescence double labeling method
target cells
Opis:
Thymus, an important central immune organ in pigs, is the site of T lymphocyte development and maturation and an important target organ for infection and replication of various pathogens. Highly pathogenic porcine reproductive and respiratory syndrome virus (HP-PRRSV) infection results in severe thymic atrophy in piglets. This study aimed to explore the effects of HP-PRRSV on the thymic structure of piglets to elucidate the pathogenesis of thymic atrophy induced by HP-PRRSV. In this study, histopathological techniques and immunofluorescence double staining techniques were used to analyze thymic tissues infected by HP-PRRSV to explore the structural changes of thymus caused by the viral infection and its target cell types. An antibody of cluster of differentiation (CD) 3 (CD3), CD20, CD80, or calgranulin + calprotectin was applied to identify T cells, B cells, dendritic cells (DCs), and macrophages, respectively. The results indicated that a variety of cell components in the thymic tissue were diffusely damaged after viral infection. In the infected thymic tissue, CD80- or calgranulin + calprotectin- -labeled cells supported the HP-PRRSV infection, whereas CD3-labeled T cells and CD20- -labeled B cells did not support the viral infection. The results showed that HP-PRRSV caused the reduction of visible cell components in the thymic tissue, and the virus attacked CD80- and calgranulin + calprotectin-positive cells (such as DCs and macrophages) in the thymic tissue, which played an important role in the pathogenesis of thymus atrophy. These results lay the foundation for elucidating the immunosuppression of piglets after infection with HP-PRRSV.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 2; 287-294
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of differentiation time of mesenchymal-stem-cell to tenocyte under a cyclic stretching with a microgrooved culture membrane and selected measurement cells
Autorzy:
Morita, Y.
Yamashita, T.
Toku, Y.
Yu, Y.
Powiązania:
https://bibliotekanauki.pl/articles/307018.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
różnicowanie
kości
stymulacja mechaniczna
hBMSC
cyclic stretch
differentiation
differentiation time
human bone marrow-derived mesenchymal stem cell
mechanical stimulus
tenocyte
Opis:
There is a need for efficient stem cell-to-tenocyte differentiation techniques for tendon tissue engineering. More than 1 week is required for tenogenic differentiation with chemical stimuli, including co-culturing. Research has begun to examine the utility of mechanical stimuli, which reduces the differentiation time to several days. However, the precise length of time required to differentiate human bone marrow-derived mesenchymal stem cells (hBMSCs) into tenocytes has not been clarified. Understanding the precise time required is important for future tissue engineering projects. Therefore, in this study, a method was developed to more precisely determine the length of time required to differentiate hBMSCs into tenocytes with cyclic stretching stimulus. Methods: First, it had to be determined how stretching stimulation affected the cells. Microgrooved culture membranes were used to suppress cell orientation behavior. Then, only cells oriented parallel to the microgrooves were selected and evaluated for protein synthesis levels for differentiation. Results: The results revealed that growing cells on the microgrooved membrane and selecting optimally-oriented cells for measurement improved the accuracy of the differentiation evaluation, and that hBMSCs differentiated into tenocytes in approximately 10 h. Conclusions: The differentiation time corresponded to the time required for cellular cytoskeleton reorganization and cellular morphology alterations. This suggests that cells, when subjected to mechanical stimulus, secrete mRNAs and proteins for both cytoskeleton reorganization and differentiation.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 1; 3-10
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selective flotation of siderite and quartz from a carbonate-containing refractory iron ore using a novel amino-acid-based collector
Autorzy:
Gu, X.
Zhu, Y.
Li, Y.
Han, Y.
Powiązania:
https://bibliotekanauki.pl/articles/110222.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
flotation
quartz
hematite
siderite
refractory iron ores
molecular simulation
Opis:
A novel and highly-efficient amino-acid-based collector, α-ethylenediamine lauric acid (α-EDA-LA), was studied to selectively beneficiate carbonate-containing refractory hematite ores. Single mineral and synthetic mixture flotation tests were carried out to investigate its floating performance. Zeta potential, fourier transform infrared spectroscopy (FTIR) and Density Functional Theory-based molecular simulation were used to identify the adsorption mechanism. The flotation results showed that quartz could be collected effectively at pH 11.0-12.0 in the reverse flotation. For siderite, the recovery peaked at 83.4% at pH 8.0, where siderite presented different floatability from magnetite and hematite. Exploiting such difference, the separation of siderite could be achieved. Zeta-potential measurements showed that α-EDA-LA adsorption on the surfaces of siderite and quartz decreased the corresponding zeta potentials at pH of 8.0-10.0 and 8.0-12.0, respectively. This means the adsorption overcome the electrostatic repulsion between α-EDA-LA and the mineral surfaces. The molecular simulation indicated that no chemisorption took place between α-EDA-LA and quartz. FTIR analysis suggested that α-EDA-LA was adsorbed on quartz via hydrogen bonding. The adsorption of α-EDA-LA on siderite surface was dominated by chemisorption, while further enhanced by hydrogen bonding. This study filled the gap in the research on siderite flotation reagents and its adsorption mechanism.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 3; 803-813
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of integrated product model for supporting production monitoring system on an automobile assembly industry
Autorzy:
Raharno, S.
Martawirya, Y. Y.
Powiązania:
https://bibliotekanauki.pl/articles/246032.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
integrated product data model
production monitoring system
production information system
automobile assembly industry
Opis:
Making a good production planning is a first step to produce products in effective and efficient ways. A good production planning needs information about the real conditions in the shop-floor. Without knowing the actual conditions in the shop-floor, it will be difficult to plan production well. In order to know the conditions of the shop-floor, a production monitoring system is needed. This paper deals with development of integrated product model for supporting production monitoring system on an automobile assembly industry. The integration of information between the production controls with the shop-floor is needed to build a production monitoring system. One way to integrate the two systems is by using a product model that is a representation of a real product. In general, the research method used in this research is the development of product models and other related models. The modelling concept used in this research is object oriented modelling. After that, this research also has developed a database in accordance with the developed models and interfaces used to manipulate them. The main proposed models in this research are the product type model and the product model. The product type model is the product model that represents the product designs. On the other hand, the product model is a model that represents the actual products. If the data on the product type model is relatively static, then the data on the product model is dynamic depending on the state of the real product. Each product model will have production sequence processes in accordance with the sequence processes of the represented product. Each time a process of real product is finished, and then the related process model in the product model will be updated. The condition of the processes that has occurred in the shop-floor will be known by manipulating data of the product models.
Źródło:
Journal of KONES; 2011, 18, 3; 367-374
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł

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