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Wyświetlanie 1-10 z 10
Tytuł:
Electronic Structure of Ternary Antimonides GdNiSb
Autorzy:
Wei, X.
Hu, X.
Dai, Y.
Lei, T.
Chu, S.
Deng, J.
Powiązania:
https://bibliotekanauki.pl/articles/1505358.pdf
Data publikacji:
2011-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.-b
71.15.Ap
71.15.Mb
71.20.Eh
71.20.Lp
Opis:
In the paper density functional theory method was applied to explore the electronic and magnetic properties of the GdNiSb in low-temperature phase with cubic MgAsAg-type structure and in the high-temperature phase. The calculations were performed by first principles full-relativistic full potential local orbital method within the local spin density approximation. The calculations results show the metallic character of GdNiSb compound in the high-temperature phase with hexagonal $AlB_2$-type structure. For the low-temperature phase of the cubic GdNiSb system, they indicate a semiconducting behavior. The density of states below the Fermi level is greater in high-temperature phase than in low-temperature one, the calculated magnetic moment is in good agreement with an available experimental value.
Źródło:
Acta Physica Polonica A; 2011, 119, 3; 405-407
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Research on Characterization of Crushability for Foundry Sand Particles
Autorzy:
Dai, Y.
Ma, Q. Y.
Li, X. H.
Zhang, X.
Hu, F. P.
Zhang, Y.
Xie, W. D.
Powiązania:
https://bibliotekanauki.pl/articles/379689.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry sand particle
mechanical load
AFS grain fineness
crushability
piasek odlewniczy
obciążenie mechaniczne
rozdrobnienie ziarna
Opis:
In this paper, crushability of foundry sand particles was studied. Three kinds of in-service silica sands in foundry enterprises selected as the study object, and foundry sand particles were subjected to mechanical load and thermal load during service were analyzed. A set of methods for simulating mechanical load and thermal load by milling and thermal-cold cycling were designed and researched, which were used to characterize the crushability for silica sand particles, the microstructure was observed by SEM. According to the user’s experience in actual application, the crushability of Sand C was the best and then Sand B, the last Sand A. The results indicated that mechanical load, thermal load and thermal-mechanical load can all be used to characterize the crushability of foundry sand particles. Microscopic appearances can qualitatively characterize the crushability of foundry sand particles to a certain extent, combining with the additions and cracks which are observed on the surface.
Źródło:
Archives of Foundry Engineering; 2017, 17, 4; 231-235
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Ageratina adenophora on hepatic and pulmonic pathological lesions in horses
Autorzy:
Gu, X.L.
Dai, F.Y.
Xiao, X.
Li, G.Z.
Zhang, L.M.
Qu, W.J.
Powiązania:
https://bibliotekanauki.pl/articles/2087129.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Ageratina adenophora
liver
lung
horse
toxicity
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 4; 611-613
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the Extrinsic Fabry-Perot Interference (EFPI) technology for optical fiber sensing technology of mine gas
Technologia EFPI wykrywania obecności gazów przy pomocy specjalnych włókien
Autorzy:
Zhou, M. R.
Dai, H.
Ling, D. Y.
Ye, Y. L.
Powiązania:
https://bibliotekanauki.pl/articles/348694.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
EFPI
gaz kopalniany
czujniki z włóknami optycznymi
mine gas
fiber optical sensors
Opis:
Along with the expansion of the mining capacity, the mine gas accident is more and more. There are still many shortages and defects in gas monitoring system in the previous gas concentration monitoring method. Therefore, we propose the optical fiber sensing technology of mine gas method based on Extrinsic Fabry-Perot Interferometer (EFPI) technology. According to the analysis of interference spectrum from EFPI fiber optic sensor, the varying information is obtained. Then the concentration of the gas is calculated, by Beer Law and the relations between light intensity and concentration of gas. The method implements the high resolution of optical fiber sensing, and avoids the light interference and so on. This method, which can eliminate all kinds of interference in monitoring gas concentration, is a new method on measuring the concentration of gas at harsh environments under coal mine. It has extremely high security and strong anti-interference capability. The method works well in inflammable and explosive environment, which has an important significance for safety production in the coal.
Wraz z rozwojem górnictwa w górnictwie występuje coraz więcej wypadków. Obserwuje się wciąż brak lub wadliwe działanie systemów monitorujących zawartość gazów w kopalniach. Dlatego autorzy niniejszej pracy zaproponowali technologię wykrywania obecności gazów przy pomocy specjalnych włókien przy pomocy interferometru Fabry-Perot'a EFPI. Koncentrację gazów oblicza się przy pomocy prawa Beer'a, z zależności pomiędzy intensywnością światła w czujniku optycznym, a stężeniem gazu. Metoda ta pozwala na wdrożenie do górnictwa metod wykrywania gazów przy wykorzystaniu włókien optycznych, wykluczając jednocześnie zjawisko interferencji świetlnej i temu podobnych. Metoda ta, eliminuje wszelkiego rodzaju interferencję w monitorowaniu stężenia gazów jest nowatorską metodą pomiaru stężenia gazów w kopalniach podziemnych. Metoda ta również zapewnia bezpieczeństwo. Metoda ta sprawdza się zarówno w środowisku gdzie nie ma zagrożenia gazowego, jak również w środowisku gdzie mogą wystąpić gazy wybuchowe, co jest bardzo ważne dla zapewnienia bezpieczeństwa pracy przy produkcji węgla.
Źródło:
AGH Journal of Mining and Geoengineering; 2012, 36, 3; 501-507
1732-6702
Pojawia się w:
AGH Journal of Mining and Geoengineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and Characterization of 1-(1-chlorocyclopropyl)-2-(1,2,4-triazol-1-yl)ethan-1-one
Autorzy:
Ji, H.
Niu, Y.
Liu, D.
Wang, W.
Dai, C.
Powiązania:
https://bibliotekanauki.pl/articles/778677.pdf
Data publikacji:
2017
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
prothioconazole
1,2,4-triazole
N-alkylation reaction
Opis:
A simple and efficient method to prepare 1-(1-chlorocyclopropyl)-2-(1,2,4-triazol-1-yl)ethan-1-one via nucleophilic substitution of 2-chloro-1-(1-chlorocyclopropyl)ethanone and 1,2,4-triazole is described. The title compound is the key intermediate required for the synthesis of prothioconazole, a promising agricultural fungicide. By exploring changes in the reaction time, temperature, ratio of starting reagents, acid binding agent, and the nature of phase transfer catalyst, the reaction conditions could be optimized to afford the desired N-alkylated material in near-quantitative yield. The ultimate yield of the product after recrystallization was 93%, with a purity of 99% based on its characterization by Gas Chromatography-Mass Spectrometer (GC-MS), Fourier Transform infrared spectroscopy (IR), Proton Magnetic Resonance (1H NMR), and Carbon-13 Nuclear Magnetic Resonance (13C NMR). The synthetic process is suitable for industrial application, with the advantages of high yield and facile preparation under mild operating conditions.
Źródło:
Polish Journal of Chemical Technology; 2017, 19, 1; 41-47
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method for probing the refractive index change in photorefractive crystals
Autorzy:
Fu, M.
Gao, C.
Wang, X.
Cui, Y.
Dai, S
Powiązania:
https://bibliotekanauki.pl/articles/174913.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Fourier transform profilometry
refractive index change
photorefractive effect
Opis:
A method for probing refractive index changes in photorefractive crystals using an interferometric technique and digital image processing was proposed. Based on equal thickness interference in LiNbO3 crystal and Fourier transform profilometry, we obtained phase value changes in interferograms induced by a photorefractive effect, and further calculated refractive index changes. The maximal values for extraordinary light (e-light) and ordinary light (o-light) are 6.6×10–4 and 1.2×10–4, respectively.
Źródło:
Optica Applicata; 2013, 43, 4; 731-737
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on the impact of electric vehicle charging load on nodal voltage deviation
Autorzy:
Ma, G.
Jiang, L.
Chen, Y.
Dai, C.
Ju, R.
Powiązania:
https://bibliotekanauki.pl/articles/141119.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
distribution network
electric vehicle charging load (EVCL)
stochastic load
voltage deviation
Opis:
The promotion and application of electric vehicles will contribute to the solution of several problems, such as energy shortage and environmental pollution, and the achievement of country economy and energy security. But a large-scale vehicle-to-grid system may cause adverse effects in the distribution network operation, the power network planning and such other parts. First, this paper collects the factors that influence the electric vehicle charging load and establishes the EV charging load model with a Monte- Carlo method. Then, we analyze the effect that the EV charging load made on the nodal voltage deviation under different permeability based on the IEEE30 node system. At last, this research gets the conclusion that the nodal voltage deviation is closely related to EV permeability, node type and node location. This research conclusion will provide practical guidance to the charging station planning.
Źródło:
Archives of Electrical Engineering; 2017, 66, 3; 495-505
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on the State of Internal Stress and Strain of TATB-based Polymer Bonded Explosive Using Strain Markers and Cone-Beam Computed Tomography
Autorzy:
Dai, B.
Lan, L.-G.
Zhang, W.-B.
Tian, Y.
Powiązania:
https://bibliotekanauki.pl/articles/358613.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
technology of materials
testing and analysis
compression molding
polymer bonded explosive
stress state
strain ellipsoid
X-ray tomography
Opis:
Precise measurement of the inner structural strain of polymer bonded explosive (PBXs) granules during compression molding is highly desirable in order to investigate the inner stress distribution field and its underlying generation mechanism, with the aim of improving the stress distribution uniformity. In this contribution, TATB-based (1,3,5-triamino-2,4,6-trinitrobenzene) PBX granules were formulated and the stress-strain state of the PBX granules during the warm molding process was analyzed. Strain markers were implanted at different locations and the deformation characteristics and regularity of the embedded spherical strain markers were obtained by X-ray micro-tomography. Thus the local strain states at different locations could be obtained, and the local stress state could be deduced. The results showed that axisymmetric deformation occurred in all of the strain markers, where the flat strain ellipsoids were mainly compressed uni-axially. In the central region, the stress was mainly in an axial direction, and the shear force was small. Not only axial stresses, but also large shear stresses in the surrounding region of the cylindrical grains were present. The stress gradient in the central region was greater than that in the surrounding region. The stress was greater in the surrounding region because this region was squeezed by the mold. The maximum strain degree was 44.8% larger than the minimum strain degree. The local stress increment in each region was quantified. The stress increments of the three axes were in the range 14.2-19.5 MPa. This study examined the feasibility of evaluating the inner stress–strain state of PBX granules in a quantitative manner, which is significant in determining the inner strain and stress distribution in PBX granules during the molding process.
Źródło:
Central European Journal of Energetic Materials; 2017, 14, 3; 688-707
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of a linear epitope in the capsid protein of goose astrovirus with monoclonal antibody
Autorzy:
Dai, G.
Huang, X.
Liu, Q.
Li, Y.
Zhang, L.
Han, K.
Yang, J.
Liu, Y.
Xue, F.
Zhao, D.
Powiązania:
https://bibliotekanauki.pl/articles/16647377.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
epitope
goose astrovirus
capsid protein
monoclonal antibody
Opis:
Goose astrovirus (GoAstV) is a novel avastrovirus that typically causes gosling gout and results in 2 to 20% mortality. GoAstV capsid protein is the sole structural protein, which is responsible for viral attachment, assembly, maturation as well as eliciting host antibodies. However, the epitopes within capsid protein have not been well studied. In this study, a monoclonal antibody, named 1D7, was generated against GoAstV capsid protein by hybridoma technology. Western blot results showed that this MAb could react with recombinant capsid protein expressed in E. coli. Also, it recognized the precursor of capsid protein, VP90 and VP70, in GoAstV-infected cells. Besides, excellent specificity of MAb 1D7 was further demonstrated in indirect immunofluorescence assay and immunohistochemical analysis. Epitope mapping results revealed that MAb 1D7 recognized the epitope 33QKVY 36 within Cap protein. Sequence alignment indicated that 33QKVY 36 is a conserved epitope among the isolates of goose astrovirus type 2 (GoAstV-2), suggesting the potential for its use in GoAstV-2 specific diagnostic assay. These findings may provide some insight into a function of the GoAstV capsid protein and further contribute to the development of diagnostic methods for GoAstV infection.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 4; 579-587
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Different Ignition Responses of Powdery and Bulky 1,3,5-Triamino-2,4,6-trinitrobenzene (TATB) Based Polymer-bonded Explosives under Ultra-high Voltage Electrostatic Discharge
Autorzy:
Lyu, Z.
Long, X.
Li, Z.
Dai, X.
Deng, C.
He, S.
Li, M.
Yao, K.
Wen, Y.
Powiązania:
https://bibliotekanauki.pl/articles/358240.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
electrostatic spark sensitivity
ultra-high voltage electrostatic discharge
thermal effect
electric field effect
Opis:
The electric spark induced ignition mechanism for explosives needs further study. The ignition of powdery and bulky TATB by electrostatic discharge (ESD) was investigated. Up to 200 kV ultra-high voltage ESD was applied to powdery and bulky explosives of two TATB-based polymer-bonded explosives (named PBX-1 and PBX-2). The results showed that the spark sensitivities of powdery and bulky explosives are extremely different for the same formulation. The 50% ignition voltages of powdery PBX-1 and PBX-2 were 10.8 kV and 8.5 kV, respectively, while the values for the bulky samples (tablets) were not less than 200 kV. Both heat and the electric field can be transmitted into the powdery samples, on the other hand only the electric field can be transmitted into the bulk samples. The electric field has a smaller contribution while the heat has a larger contribution to the ignition during an ESD, i.e., the thermal effect plays a main role in the ignition process. Our experimental results are in good agreement with recent results calculated by density functional theory.
Źródło:
Central European Journal of Energetic Materials; 2018, 15, 2; 283-298
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-10 z 10

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