Wyniki wyszukiwania - BazTech

1

A Unified Approach to Multisource Data Analyses

Ravat F., Song J.

Fundamenta Informaticae

|

2018

|

Vol. 162, nr 4

311--359

EN

Classically, Data Warehouses (DWs) supports business analyses on data coming from the inside of an organization. Nevertheless, Lined Open Data(LOD) might sensibly complete these business analyses by providing complementary perspectives during a decision-making process. In this paper, we propose a conceptual modeling solution, named Unified Cube, which blends together multidimensional data from DWs and LOD datasets without materializing them in a stationary repository. We complete the conceptual modeling with an implementation framework which manages the relations between a Unified Cube and multiple data sources at both schema and instance levels. We also propose an analysis processing process which queries different sources in a transparent way to decision-makers. The practical value of our proposal is illustrated through real-world data and benchmarks.

2

Gas-sensing properties and in-situ diffuse-reflectance Fourier-transform infrared spectroscopy study of diethyl ether adsorption and reactions on SnO2 film

Wang N., Huang K., Song J.

Materials Science Poland

|

2017

|

Vol. 35, No. 2

265--274

EN

Diethyl ether is a common industrial reagent and medical anesthetic. It is necessary to carry out real-time monitoring of this molecule due to its harmful effects on human health. In this paper, a highly sensitive diethyl ether SnO2 gas-sensing material has been prepared by a sol-gel method. The gas sensitivity was tested by a home-made gas-sensing equipment. The surface adsorption and reaction processes between the SnO2 gas-sensing film and the diethyl ether have been studied by in situ diffuse-reflectance Fourier-transform infrared spectroscopy (DRFT-IR) at different temperatures. The results show that the SnO2 gas-sensing material has high sensitivity to diethyl ether, and the lowest detection limit can reach 1 ppm. Furthermore, ethyl (CH3CH2•), oxoethyl (CH3CH2O•), ethanol (CH3CH2OH), formaldehyde (HCHO), acetaldehyde (CH3CHO), ethylene (C2H4), H2O and CO2 surface species are formed during diethyl ether adsorption at different temperatures. A possible mechanism of the reaction process is discussed.

3

Structure and Properties of Modified Flax Yarn with Collagen

Sui Z., Pang W., Wei Y., Song J.

Fibres & Textiles in Eastern Europe

|

2015

|

Vol. 23, no. 1 (109)

30--34

EN

The structure and property changes of collagen modified flax yarn were investigated in order to improve the usability of flax yarn. First flax yarn was treated with sodium hydroxide solution and next with chloroacetic acid to get carboxymethyl flax yarn. Then the carboxymethyl flax yarn was grafted with gelatin protein solution to obtain modified flax yarn. Reactive blue dye was used for the dyeing test of the modified flax yarn. Its structure was characterized and analysed by FT-IR, X-ray diffraction and SEM. Meanwhile breaking strength and elongation at break of the modified flax yarn and the exhaustion rate and fixation rate of reactive blue dye was tested, respectively. The results show that the carboxymethyl flax yarn and gelatin protein are combined with a chemical bond. The different mass concentration of the gelatin solution has some influence on the grafting rate of flax yarn grafted with collagen. After modification of the flax yarn, the breaking strength shows a little loss, the elongation at break increases to a certain degree, and the exhaustion and fixation rate of the reactive dye increase significantly.

PL

Badano strukturę i zmiany właściwości przędz lnianych modyfikowanych kolagenem w celu polepszenia właściwości użytkowych. W pierwszej fazie przędze traktowano roztworem wodorotlenku sodu, a następnie kwasem chlorooctowym w celu otrzymania karboksymetylocelulozy. Otrzymaną przędzę szczepiono roztworem protein. Przędzę barwiono reaktywnym barwnikiem niebieskim. Właściwości strukturalne przędzy zbadano stosując spektroskopię FTIR, dyfrakcję rentgenowską i SEM. Stwierdzono, że zmodyfikowane przędze posiadają nieznacznie mniejszą wytrzymałość na rozciąganie, natomiast większe wydłużenie przy zerwaniu. Stwierdzono również, że zdolności barwienia wzrosły znacznie po modyfikacji.

4

A Study On The Metal Carbide Composite Diffusion Bonding For Mechanical Seal

Kim D.-K., Shon I.-J., Song J., Ryu W.-J., Shin H.-Ch., Kwon E.-Y., Shin H., Kang S.-J.

Archives of Metallurgy and Materials

|

2015

|

Vol. 60, iss. 2B

1479--1483

EN

Mechanical Seal use highly efficient alternative water having a great quantity of an aqueous solution and has an advantage no corrosion brine. Metal Carbide composites have been investigated as potential materials for high temperature structural applications and for application in the processing industry. The existing Mechanical seal material is a highly expensive carbide alloy, and it is difficult to take a price advantage. Therefore the study of replacing body area with inexpensive steel material excluding O-ring and contact area which demands high characteristics is needed. The development of WC-Ni base carbide alloy optimal bonding composition technique was accomplished in this study. To check out the influence of bonding temperature and time, bonding characteristics of sintering temperature was experimented. The bonding statuses of this test specimen were excellent. The hardness of specimen and bonding rate were measured using ultrasound equipment. In this work, Powder of WC (involved VC, Cr), Co and Mo2C mixed by attrition milling for 24hours. Nanostructured WC-27.6wt.%Ni-1.5wt.%Si-0.11wt.%VC-1.1wt.%B4C composite were fabricated at 1190°C by high temperature vacuum furnace. To check out the influence of bonding temperature and time, bonding characteristics of sintering temperature was experimented. Its relative density was about 99.7%. The mechanical properties (hardness and fracture toughness) were 87.2 HRA and 4.2 M·Pam1/2, respectively. The bonding status of this test specimen was excellent and the thickness of bonding layer was 20 ~30§ at 1050 and 1060°C bonding temperature.

5

Sprzętowe rozpoznawanie anomalii pracy agregatów napędzanych silnikami elektrycznymi

Song J., Nowicki R., Duyar A.

Napędy i Sterowanie

|

2014

|

R. 16, nr 1

96--106

PL

W dokumencie przedstawiono unikalną technologię umożliwiającą bardzo wczesne ostrzeganie o rozwijającym się uszkodzeniu maszyn i/lub urządzeń. Sprzętowa detekcja anomalii jest wykorzystywana celem zwiększenia zdolności produkcyjnych, a także sprawności energetycznej poprzez zapobieganie niespodziewanym przestojom. Prezentowane podejście wykorzystuje mechanizm detekcji uszkodzeń oparty na modelowaniu z wykorzystaniem technik analizy widmowej. Jako przykład zaprezentowano wybrane wyniki uzyskane w czasie wdrożenia w hucie.

EN

This paper presents a unique technology for early warning of pending failures of industrial equipment. The technology is used to increase productivity and energy efficiency by preventing unexpected downtime and faulty operation of equipment. The technology uses model based fault detection and diagnosis approach using system identification and spectral analysis techniques. As an example chosen results of an implementation for iron and steel industry are presented.

6

Fluorescent DNA probe based on CdTe/CdS/SiO2 core/multishell composite nanoparticles

Song J., Dai Z., Guo W., Li Y., Wang W.

Przegląd Elektrotechniczny

|

2013

|

R. 89, nr 1b

48--50

EN

A novel kind of fluorescent DNA Probe based on fluorescence resonance energy transfer (FRET) was presented in this paper when CdTe/CdS/SiO2 core/multishell fluorescent nanoparticles were as energy donors and Au nanoparticles (AuNPs) were as energy acceptors. The DNA probes were prepared when energy donors and acceptors were conjugated with two single-stranded complementary oligonucleotides respectively and hybridized with each other. Compared with the fluorescent intensity of single-stranded DNA (ssDNA) conjugated CdTe/CdS/SiO2 nanoparticles (CdTe/CdS/SiO2-DNA), the fluorescent intensity of DNA probe was significantly increased and the FRET efficiency was about 71%. The detection results indicated that this novel DNA probe had excellent detection and specificity of completely complementary target ssDNA.

PL

W pracy zaprezentowano nowy rodzaj fluoryzującej próbki DNA opartej o rezonansowe przenoszenie energii fluoryzacji (FRET), gdzie donorami energii są nanocząstki CdTe/CdS/SiO2 z jądrową fluorescencją powłokową a akceptorami energii nanocząstki Au (AuNPs). W przygotowanych próbkach DNA energia donora i akceptora są odpowiednio sprzężone z dwoma pojedynczo skręconymi komplementarnymi oligonukleotydami i hybrydyzowane ze sobą. Intensywność fluorescencji próbki DNA ze sprzężonymi nanocząstkami CdTe/CdS/SiO2 (CdTe/CdS/SiO2 -DNA) w porównaniu z próbką pojedynczo-skręconego DNA (ssDNA) znacząco wzrasta, Wydajność FRET wynosi około 71%. Wyniki wykrywalności wykazują, że nowa próbka DNA ma doskonałą wykrywalność i swoistość do całkowicie komplementarnego docelowego ssDNA.

7

Preparation, characterization and photocatalytic performances of materials based on CS2-modified titanate nanotubes

An H., Hu X., Zhu B., Song J., Zhao W., Zhang S., Huan W.

Materials Science Poland

|

2013

|

Vol. 31, No. 4

531--542

EN

CS2-modified titanate nanotubes (CS2/TiO2–NTs) are fabricated by reaction of CS2 and Ti–O2Na+ species on titanate nanotubes. Pb2+ ions are coated on the modified nanotubes by ion exchange (Pb/CS2/TiO2–NTs). The products are characterized by means of nitrogen adsorption-desorption isotherms at 77 K (BET method), transmission electron microscopy (TEM), X-ray photoelectron spectrometry (XPS), X-ray diffraction (XRD), atomic absorption spectrometry (AAS), and diffuse reflectance spectroscopy (DRS). The photocatalytic performances of the products are evaluated by monitoring their catalytic activities for degradation of methyl orange under UV light irradiation. The effects of calcination temperature and atmosphere on the photocatalytic performance are investigated. The results reveal that the photocatalytic activities of CS2/TiO2–NTs and Pb/CS2/TiO2–NTs are far higher than that of primary nanotubes, and the optimum calcination temperature is 500 °C under N2 atmosphere. It is also discovered that physically adsorbed Pb2+ ions affect the photocatalytic activity of Pb/CS2/TiO2–NTs obviously. The photocatalytic activity of washed Pb/CS2/TiO2–NTs is higher than that of the unwashed one under the same thermal treatment and reaction conditions.

8

Zastosowanie modelowania diagnostycznego dla wspomagania predykcyjnego utrzymania ruchu i zwiększenia efektywności energetycznej w hucie

Song J., Nowicki R., Duyar A.

Maszyny Elektryczne : zeszyty problemowe

|

2013

|

Nr 2(99)

233--240

PL

W dokumencie przedstawiono unikalną technologię umożliwiającą bardzo wczesne ostrzeganie o rozwijającym się uszkodzeniu maszyn i/lub urządzeń. Sprzętowa detekcja anomalii jest wykorzystywana celem zwiększenia zdolności produkcyjnych, a także sprawności energetycznej poprzez zapobieganie niespodziewanym przestojom. Prezentowane podejście wykorzystuje mechanizm detekcji uszkodzeń oparty na modelowaniu z wykorzystaniem technik analizy widmowej. Zaprezentowano wyniki uzyskane w czasie pilotażowego wdrożenia w hucie.

EN

This paper presents a unique technology for early warning of pending failures of industrial equipment. The technology is used to increase productivity and energy efficiency by preventing unexpected downtime and faulty operation of equipment. The technology uses model based fault detection and diagnosis approach using system identification and spectral analysis techniques. Implementation and case studies for iron and steel industry are presented.

9

Friction and wear reduction using lanthanum and boron compounds in oil

Song J., Xiyun C., Yunlong W., Xinjing C., Boshui C., Yinhua J., Guoxu C.

Applied Mechanics and Engineering

|

1999

|

Vol. 4, no spec.

183-188

EN

In the present paper, experimental results indicate that lanthanum dialkyldithiophosphate(LaDDP) and an organo-borate(OB) have excellent anti-wear and friction-reducing abilities. The boundary film composition, characterized by X-ray photoelectron spectroscopy(XPS)and Auger electron spectroscopy (AES), reveals that the anti-wear and friction layer containing [...] phosphate, sulphate and tribopolmer, pervent the rubbing pairs from contaction and result in better extreme-pressure and anti-wear behavior. Its tribological mechanism was suggested.

10

Tribological performances of gadolinium and boron compounds in oil

Boshui Ch., Song J., Yee Y., Junxiu D.

Tribologia

|

1998

|

z. 2

207-217

EN

Experimental results indicate that gadolinium dialkyldilhiophosphate (GdDDP) and an organo-borate (OB) exhibit exellent antiwear and friction-reducting abilities.Scanning Electron Microscopy (SEM) and Auger Electron Microscopy (A ES) analytical results demonstrate that the abilities are due to the formation of some tribochemicalspecies composed of elements gadolinium, boron, sulfur and phosphorus on friction surfaces,also to the production of a tribodiffusion layer of boron. Tribodiffusion of boron can be promoted by element gadolinium, increasing Vickers hardness and therefore improving wear-resistance of the friction pairs

PL

Wyniki badań eksperymentalnych wskazują, że dialkiliofosforan gadolinu (GdDDP) i organiczny boran (OB) posiadają doskonałe właściwości przeciwzużyciowe i przeciwtarciowe.Reultaty analiz na skanningowym mikroskopie elektronowym (SEM) oraz spektroskopie elektronów Augera (AES) pozwalają stwierdzić, że właściwości te wynikają z tworzenia sie na powierzchni tarcia związków zawirających gadolin, bor siarkę oraz fosfor oraz z powstawania tribodyfuzyjnej warstwy boru.Wywołana prawdopodobnie obecność gadolinu tribodyfuzja boru podwyższa twardość Vickersa, dzięki czemu zwiększona jest odporność skojarzenia na zużycie.

11

A stability based neural networks controller design method

Song J., Xu X., He X.

Control and Cybernetics

|

1998

|

Vol. 27, no 1

119-133

EN

The use of neural networks in control systems can be seen as a natural step in the evolution of control methodology to meet new challenges. Many attempts have been made to apply the neural networks to deal with non-linearities and uncertainties of the control systems. Research in neural network applications to control can be classified according to the major methods depending on structures of the control system, such as NN-based NON-linear System Identification, NN-based Supervised Control, NN-based Direct Control, NN-based Indirect Control, NN-based Adaptive Control, NN-based Self-learning Control, NN-based Fuzzy Control, and NN Variable Structure Control. All these control methods cannot, however, effectively guarantee system stability, i.e. none of these neural network controls, except for NN-based Variable Structure Control, is based on system stability. This also limits the application and development of the neural networks in control theory. The paper shows the effort to solve this difficulty and give a way for the design method of the stability based neural networks controller using Lyapunov second stability theorem. This kind of controller can not only guarantee system stability, but also fully compensate for the influence of system uncertainties and non-linearities.Simulation results also show the effectiveness of the controller.