Autor: Yan, S. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Bivariate Hahn moments for image reconstruction
Autorzy:: Wu, H.
Yan, S.
Tematy:: bivariate Hahn moments
bivariate Hahn polynomials
image reconstruction
pattern recognition
odtworzenie obrazu
rozpoznawanie obrazu; Pokaż więcej
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Powiązania:: https://bibliotekanauki.pl/articles/331058.pdf Link otwiera się w nowym oknie
Opis:: This paper presents a new set of bivariate discrete orthogonal moments which are based on bivariate Hahn polynomials with non-separable basis. The polynomials are scaled to ensure numerical stability. Their computational aspects are discussed in detail. The principle of parameter selection is established by analyzing several plots of polynomials with different kinds of parameters. Appropriate parameters of binary images and a grayscale image are obtained through experimental results. The performance of the proposed moments in describing images is investigated through several image reconstruction experiments, including noisy and noise-free conditions. Comparisons with existing discrete orthogonal moments are also presented. The experimental results show that the proposed moments outperform slightly separable Hahn moments for higher orders.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A new approach to robust ﬁnite-time H∞ control of continuous-time Markov jump systems
Autorzy:: Yan, S.
Shen, M.
Fei, S.
Zhang, G.
Tematy:: Markov jump systems
partly known transition probabilities
rob ust ﬁnite-time H∞control; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Powiązania:: https://bibliotekanauki.pl/articles/206785.pdf Link otwiera się w nowym oknie
Opis:: This paper studies the robust ﬁnite-time H∞ state feedback control problem of continuous-time Markov jump systems (MJSs) subject to norm bounded uncertainties. Transition probabilities are allowed to be known, uncertain with known bounds or unknown. Based on the continuous transition probability property and the developed slack variable technique, Lyapunov variables are separatek from unknown transition probabilities and system matrices. With these separations, a relaxed method for robust ﬁnite-time H∞ controller design is proposed in terms of linear matrix inequalities (LMIs). Numerical examples are given to illustrate the eﬀectiveness of and the beneﬁt from the proposed method.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Influence of Bismuth Complex Catalysts on the Cure Reaction of Hydroxyl-terminated Polyether-based Polymer Bonded Explosives
Autorzy:: Ou, Y.
Jiao, Q.
Yan, S.
Zhu, Y.
Tematy:: HTPE
bismuth complex catalyst
pot-life
manufacture time reduction
mechanical and thermal characteristics; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:: https://bibliotekanauki.pl/articles/358587.pdf Link otwiera się w nowym oknie
Opis:: The kinetics of catalyzed urethane-forming reactions of hydroxyl-terminated polyether (HTPE) with toluene di-isocyanate (TDI) in the presence of bismuth complex catalysts was investigated by non-isothermal differential scanning calorimetry (DSC). Fourier transform infrared spectroscopy (FTIR) was employed to monitor the chemical interactions of relevant groups. The kinetic parameters, including the apparent activation energy (Ea) and reaction rate constants (k) at typical temperatures calculated by the Kissinger and Crane methods, were used to evaluate the catalytic activities of triphenylbismuth (TPB) and tris(3-ethoxyphenyl)bismuthine (TEPB). The variations of Ea were studied to obtain an insight into the consistency of catalytic mechanism for the bismuth complex catalysts. The viscosity build-up of HTPE-based polymer bonded explosive (PBX) slurry was then measured to verify the catalytic activity and the pot-life during an actual manufacturing process, which fitted with the kinetics of the catalyzed cure reaction. The cure process was evaluated by the hardness of the PBX grains maintained at a temperature below typical manufacturing conditions. The results showed that TEPB is an effective catalyst, reducing the Ea of the cure reaction and the manufacturing temperature and time with an acceptable pot-life. The mechanical, thermal characteristics and compatibility of the HTPE-based PBXs were also investigated. The results suggest that TEPB is compatible with HTPE-based PBXs and contributes to improving the mechanical properties and thermal safety.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The characteristics of radon and thoron concentration from soil gas in Shenzhen City of Southern China
Autorzy:: Wang, N.
Zheng, L.
Chu, X.
Li, S.
Yan, S.
Tematy:: 222Rn/220Rn
soil gas
radon mapping
China; Pokaż więcej
Wydawca:: Instytut Chemii i Techniki Jądrowej
Powiązania:: https://bibliotekanauki.pl/articles/148789.pdf Link otwiera się w nowym oknie
Opis:: Radon (222Rn) and thoron (220Rn) from soil gas are very significant factors that can affect the indoor radon level in the first floor or in the basement. China is one of the countries with the highest thorium content in the world. Therefore, it is very significant to study 222Rn/220Rn concentration in the soil in Shenzhen City (SC). A 222Rn/220Rn survey was performed using a portable radon monitor (model RAD7) at 69 sites, covered a total area of 1800 km2 in 2013 to get the original data for radon risk estimation in SC. The average values of 222Rn and 220Rn concentration of soil gas of the total 69 locations are 86 ± 72 kBq•m–3 and 118 ± 85 kBq•m–3, respectively. 222Rn/220Rn concentrations are related to geological lithology. 222Rn concentrations vary from 40 to 370 kBq•m–3 and from 15 to 118 kBq•m–3 in weathered granite products and sediments, respectively, while 220Rn concentrations are from 103 to 435 kBq•m–3 and 2.2 to 96 kBq•m–3. The higher 220Rn values were mainly observed at the sites covered by the weathered granite products. Comparing with the areas of high 222Rn concentration, the areas of high 220Rn values are larger. The distribution of 222Rn concentration in the vertical direction displays an exponential distribution mode, but there is no rule of 220Rn concentration. The investigation suggests that people should pay attention to 220Rn contribution in the radon mapping of SC, as well as in the indoor radon survey.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Fabrication of Nano- and Micron- Sized Spheres of CL-20 by Electrospray
Autorzy:: Yan, S.
Li, M.
Sun, L.
Jiao, Q.
Huang, R.
Tematy:: energetic materials
explosives
CL-20
electrospray
spherical particles; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Powiązania:: https://bibliotekanauki.pl/articles/358652.pdf Link otwiera się w nowym oknie
Opis:: The application of hexanitrohexaazaisowurtzitane (CL-20) in energetic materials will be expanded by its use as superfine particles. A method of fabricating nano- and micron-sized spheres of CL-20 by using electrospray is discussed. The effects of the precursor solution and the experimental conditions on the morphology and the crystal phase of the CL-20 particles are introduced. A variety of solvents was used to dissolve raw CL-20 for the preparation of the precursor solution with different CL-20 contents. The conductivity and viscosity of the precursor solutions were tested before the electrospray process. The electrostatic parameters were adjusted by changing the voltage and the distance between the nozzle and the plate. The morphology, crystal phase, mechanical sensitivity, density, and thermal stability of the raw CL-20 and the as-sprayed CL-20 samples were determined using scanning electron microscopy, X-ray diffraction, and differential scanning calorimetry (DSC). Furthermore, the density and the mechanical sensitivity were tested for the raw and the as-sprayed CL-20. DSC tests were conducted to compare the thermal stability and reactivity of the samples.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Global transcriptome analysis reveals genes associated with seedling advance growth traits in a selfed family of Chinese fir (Cunninghamia lanceolata)
Autorzy:: Deng, H.
Hu, D.
Wei, R.
Yan, S.
Wang, R.
Zheng, H.
Tematy:: Chinese fir
selfing
RNA-Seq
growth trait
hub gene; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Powiązania:: https://bibliotekanauki.pl/articles/2130183.pdf Link otwiera się w nowym oknie
Opis:: Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) is a major timber conifer species in southern China. In this study, we aimed to capture the rarely advanced phenomenon for selfing in this species and illustrated the underlying molecular mechanism, especially the hub gene-regulated networks and pathways, by global transcriptome analysis assays (RNA-Seq). Self-pollination trials revealed a wide variation of selfing effects among parents. Parent cx569 produced a selfed family with the best growth performance at the seedling stage. The growth-based extremely advanced (AD) (n=3) and depressed (DE) variants (n=3; different types) were then subjected to comparative RNA-Seq. The transcriptome data revealed more than 5000 differentially expressed genes (DEGs) for each comparison group (AD versus DE). Weighted gene co-expression network analysis (WGCNA) further identified more than 80 important DEGs that were significantly associated with growth traits in each comparison group. A subsequent enrichment analysis showed that the identified DEGs belonged to six main types, including xylem metabolism-related, sugar and energy metabolism-related, plant hormone signal transduction-related, stress response-related, cytochrome-related, and transcription factor genes. Ten hub genes represented by the ERF071, MYB-relate 305, WRKY6, WRKY31, PER3, LAC4, CESA8, CESA9, GID1, and PR1 genes were co-identified between AD and DE variants. These genes exhibited rather different expression patterns between AD and DE variants, especially of the transcription factor ERF071 gene that presented a low transcript level in the AD seedlings with only 4.45% activity compared to DE's. While, the plant hormone signal transduction GID1 gene was significantly upregulated in AD by about 20-fold when compared to DE's, and fold change of the lignin biosynthesis-related PER3, CESA9 and LAC4 gene expression parallel reached to 10–15 times in an upregulation pattern in AD seedlings. The set of hub gene-linked interaction networks and pathways revealed in this study may be responsible for the rarely advanced phenomenon for selfing at the seedling stage in Chinese fir.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Polish Journal of Chemistry. Vol. 74, no. 1 (2000)
Synthesis and crystal structure of tris-(1,10-phenanthroline) Nickel(II)dichromate
Autorzy:: Jiang, Z.-H.
Tang, J.-K.
Yan, S.-P.
Liao, D.-Z.
Gao, E.-Q.
Współwytwórcy:: Polskie Towarzystwo Chemiczne.
Polska Akademia Nauk. Komitet Nauk Chemicznych.
Wydawca:: Polish Chemical Society
Powiązania:: Polish Journal of Chemistry
Opis:: s. 137-140
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

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Skocz do pozycji: 8.

Tytuł:: Polish Journal of Chemistry. T. 73, no. 4 (1999)
Synthesis and Crystal Structure of [Cu(L)2](CIO4)2H2o (L=1,4,7-Triazacyclonane)
Autorzy:: Yao, X.-K.
Yan, H.-L.
Wang, G.-L.
Yan, S.-P.
Zhang, L.
Liao, D.-Z.
Współwytwórcy:: Polskie Towarzystwo Chemiczne.
Polska Akademia Nauk. Komitet Nauk Chemicznych.
Wydawca:: PWN
Powiązania:: Polish Journal of Chemistry
Opis:: p.753-756
s.753-756
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

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Skocz do pozycji: 9.

Tytuł:: Polish Journal of Chemistry. T. 74, no.7 (2000)
Polish Journal of Chemistry, Vol. 74, no. 7 (2000)
Molecular and crystal structure of [Co(en)2ox]SCN having spiral strings
Autorzy:: Wang, W. Z.
Yan, S. P.
Shen, H. Y.
Wang, G. L.
Liao, D. Z.
Jiang, Z. H.
Współwytwórcy:: Polskie Towarzystwo Chemiczne.
Polska Akademia Nauk. Komitet Nauk Chemicznych.
Wydawca:: PWN
Powiązania:: Polish Journal of Chemistry
Opis:: s. 1035-1039
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

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Skocz do pozycji: 10.

Tytuł:: Polish Journal of Chemistry. T. 74, no.11 (2000)
Synthesis, spectroscopic characterization and magnetic properties of nickel(II), cobalt(II) and manganese(II) complexes containing 4-amino-3,5-dimethyl-1,2,4-triazole and n-bridging thiocyanate
Autorzy:: Cheng P.
Jiang Z.-H
Liu X.
Tang, J.-K.
Wang, H.-M.
Cheng, P.
Liao D.-Z
Liao, D.-Z.
Jiang, Z.-H.
Yan, S.-P.
Yan S.-P.
Wang H.-M
Liu, X.
Tang J.-K.
Współwytwórcy:: Polska Akademia Nauk. Komitet Nauk Chemicznych.
Polskie Towarzystwo Chemiczne.
Wydawca:: Instytut Chemii Fizycznej PAN.
Institiute of Physical Chemistry PAS
Powiązania:: Polish Journal of Chemistry
Opis:: p. 1651-1654
s. 1651-1654
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

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