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Wyszukujesz frazę "Huang, L." wg kryterium: Autor


Tytuł:
An efficient algorithm for adaptive total variation based image decomposition and restoration
Autorzy:
Liu, X.
Huang, L.
Powiązania:
https://bibliotekanauki.pl/articles/330619.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
image decomposition
image restoration
adaptive total variation
H-1 norm
split Bregman method
dekompozycja obrazu
odtworzenie obrazu
wariacja zupełna adaptacyjna
metoda Bregmana
Opis:
With the aim to better preserve sharp edges and important structure features in the recovered image, this article researches an improved adaptive total variation regularization and H-1 norm fidelity based strategy for image decomposition and restoration. Computationally, for minimizing the proposed energy functional, we investigate an efficient numerical algorithm—the split Bregman method, and briefly prove its convergence. In addition, comparisons are also made with the classical OSV (Osher–Sole–Vese) model (Osher et al., 2003) and the TV-Gabor model (Aujol et al., 2006), in terms of the edge-preserving capability and the recovered results. Numerical experiments markedly demonstrate that our novel scheme yields significantly better outcomes in image decomposition and denoising than the existing models.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2014, 24, 2; 405-415
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Big data analysis and simulation of distributed marine green energy resources grid-connected system
Autorzy:
Tian, J.
Huang, L.
Powiązania:
https://bibliotekanauki.pl/articles/259959.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
distributed
ocean
green energy resources
grid-connected systems
big data analysis
Opis:
In order to improve the working stability of distributed marine green energy resources grid-connected system, we need the big data information mining and fusion processing of grid-connected system and the information integration and recognition of distributed marine green energy grid-connected system based on big data analysis method, and improve the output performance of energy grid-connected system. This paper proposed a big data analysis method of distributed marine green energy resources grid-connected system based on closed-loop information fusion and auto correlation characteristic information mining. This method realized the big data closed-loop operation and maintenance management of grid-connected system, and built the big data information collection model of marine green energy resources grid-connected system, and reconstructs the feature space of the collected big data, and constructed the characteristic equation of fuzzy data closed-loop operation and maintenance management in convex spaces, and used the adaptive feature fusion method to achieve the auto correlation characteristics mining of big data operation and maintenance information, and improved the ability of information scheduling and information mining of distributed marine green energy resources grid-connected system. Simulation results show that using this method for the big data analysis of distributed marine green energy resources grid-connected system and using the multidimensional analysis technology of big data can improve the ability of information scheduling and information mining of distributed marine green energy resources grid-connected system, realizing the information optimization scheduling of grid-connected system. The output performance of grid connected system has been improved.
Źródło:
Polish Maritime Research; 2017, S 3; 182-191
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biomechanical simulation of needle insertion into cornea based on distortion energy failure criterion
Autorzy:
Su, P.
Yang, Y.
Huang, L.
Powiązania:
https://bibliotekanauki.pl/articles/306549.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
rogówka
biomechanika
symulacja matematyczna
cornea
biomechanics
insertion force
suture
mathematical simulation
Opis:
Purpose: This paper is mainly about biomechanical behavior of needle insertion into cornea, and proposes a failure criterion to simulate the insertion process which has attracted considerable attention due to its importance for the minimally invasive treatment. Methods: In the process of needle insertion into cornea, tiny and complex insertion force is generated due to contact between needle and soft tissue. Based on the distortion energy theory, there is proposed a failure criterion of corneal material that can solve contact problem between rigid body and biological tissue in insertion simulation, where Cauchy stress of corneal material is the key to numerical calculation. A finite element model of in vivo cornea is built, and the cornea constrained by sclera is simplified to two layers containing epithelium and stroma. Considering the hyper-viscoelastic property of corneal material, insertion simulation is carried out. Results: By insertion experiment, the insertion force increases with insertion depth accompanying obvious fluctuations. Different insertion forces are generated at different speeds. The punctured locations are obvious in the force-displacement curves. The results of insertion simulation are generally consistent with experimental data. Maps of von Mises stress reflect the tissue injury of the cornea during insertion process, and punctured status corresponds to the point in the curves. Conclusions: The ability of this study to reproduce the behavior of needle insertion into cornea opens a promising perspective for the control of robotic surgery operation as well as the real-time simulation of corneal suture surgery.
Źródło:
Acta of Bioengineering and Biomechanics; 2016, 18, 1; 65-75
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the impact of 220 kV SISFCL on the distance protection for transmission line
Autorzy:
Luo, Y.
Shi, T.
Huang, L.
Powiązania:
https://bibliotekanauki.pl/articles/141728.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
SISFCL
distance protection
EMTDC/PSCAD
220 kV transmission line
setting method
Opis:
As the most typical application of superconducting technology, the Saturated Iron core Superconducting Fault Current Limiter (SISFCL) is a kind of ideal high voltage limiter, which can achieve noticeable limiting endless stream and has wide application prospect. However, the selectivity and sensitivity of the distance protection (DP) in the high voltage transmission network would be affected by the impedance characteristics of SISFCL. For these problems, firstly the structure and the working principle of the SISFCL are introduced briefly. Secondly, the impact mechanisms of 220 kV SISFCL on the original distance protection for the transmission line (TL) are analyzed. Then two methods of eliminating influences are deduced from the previous analysis and an improved setting method based on SISFCL for distance protection is proposed. Finally, we used EMTDC/PSCAD software to build the 220 kV SISFCL and distance protection model in the transmission network. The simulation results demonstrate that the proposed setting strategy can effectively improve the selectivity and sensitivity of distance protection and provide a reference for the practical applications of SISFCL applied to the transmission line.
Źródło:
Archives of Electrical Engineering; 2018, 67, 1; 151-163
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Copper adsorption reaction rate and ion exchange ratio during the copper activation of sphalerite
Autorzy:
Liu, J.
Luo, D.
Huang, L.
Wang, Y.
Wen, S.
Powiązania:
https://bibliotekanauki.pl/articles/110651.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sphalerite
copper activation
solution chemistry
ion exchange ratio
reaction rate
Opis:
A theoretical analysis method of the solution chemistry characteristic of Cu(II) at various pH values was developed. Using such method, the existence form of Cu species and their proportions in aqueous solution can be clearly determined. After that, the copper adsorption and ion exchange ratio (E) during the copper activation of sphalerite were investigated. The results indicated that the copper activation of sphalerite can be divided into two stages, i.e., the fast activation stage (t ≤4 min) and slow activation stage (t >4 min). The general form of the copper adsorption rate was determined as ΓCu=K1ln(t) +Γ1, which is confirmed by the data fitting of the fast activation stage. The lower activation pH results in higher ion exchange efficiency for Cu substituting Zn. For a strong acid pH of 4.1, the E maintains about 1:1 in the entire activation time range and is not dependent on the activation time. However, the value of E is greater than 1 under weak acidic (pH=6.2) and alkaline (pH=9.1) pH conditions and it significantly depends on the activation time. For such conditions, E decreases with increase in the activation time, which supports the ion exchange mechanism, but within short activation time, it is not a 1:1 ion exchange process.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 2; 377-385
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Short-term variation in zooplankton community from Daya Bay with outbreaks of Penilia avirostris
Autorzy:
Li, K.
Yin, J.
Tan, Y.
Huang, L.
Song, X.
Powiązania:
https://bibliotekanauki.pl/articles/47644.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
zooplankton
Penilia avirostris
outbreak
short-term variability
nuclear power plant
temporal variation
water temperature
salinity
chlorophyll a
aquaculture area
Daya Bay
Źródło:
Oceanologia; 2014, 56, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A polarization selective beam splitter based on a subwavelength multisubpart profile grating structure
Autorzy:
Xiao, Y.
Huang, L.
Wu, H.
Sun, X.
Xiao, W.
Duan, J.
Powiązania:
https://bibliotekanauki.pl/articles/174760.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
diffraction and gratings
polarizing beam splitter
PBS
leaky-mode resonance
LMR
Opis:
In this study, a polarization selective beam splitter constructed by only a single layer subwavelength multisubpart profile grating is presented. Rigorous coupled-wave analysis is adopted to investigate the properties of the structure. It is shown that for a transverse electric polarized wave, the device demonstrates very high reflectivity (>97%) from 1.46 to 1.58 μm; and for a transverse magnetic polarized wave, at the wavelength of 1.55 μm, it exhibits about 50/50 beam ratio under normal incidence. To evaluate the response of the polarizing beam splitters under variation in structure parameters, we also investigated the fabrication tolerances of the device.
Źródło:
Optica Applicata; 2016, 46, 4; 665-672
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential risk of Mesodinium rubrum bloom in the aquaculture area of Dapeng’ao cove, China: diurnal changes in the ciliate community structure in the surface water
Autorzy:
Liu, H.
Song, X.
Huang, L.
Tan, Y.
Zhong, Y.
Huang, J.R.
Powiązania:
https://bibliotekanauki.pl/articles/47949.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
potential risk
Mesodinium rubrum
bloom
aquaculture area
Dapeng'ao cove
China
diurnal change
ciliate community
surface water
heavy rainfall
water column
stratification
irradiance
Opis:
Diurnal changes in the structure of the ciliate community in surface waters were studied in the aquaculture area of Dapeng’ao cove, China. Two periods of heavy rainfall occurred during the study period, intensifying water column stratification and influencing the water’s properties. A total of 21 ciliate taxa from 15 genera were identified; the dominant species was Mesodinium rubrum. The maximum abundance of M. rubrum reached 3.92×104 indiv. dm−3, contributing 95.1% (mean value) to the total ciliate abundance. Diurnal changes in M. rubrum abundance were highly variable, the driving force probably being irradiance and food availability. The results suggest that M. rubrum may form blooms in aquaculture areas when there is a suitable physical regime with enriched nutrients, which is potentially harmful to the fish-farming industry.
Źródło:
Oceanologia; 2012, 54, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficient sulfidization of lead oxide at high temperature using pyrite as vulcanizing reagent
Autorzy:
Zheng, Y.-X.
Lv, J.-F.
Wang, H.
Wen, S.-M.
Huang, L.
Powiązania:
https://bibliotekanauki.pl/articles/110351.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
lead oxide
sulfidization roasting
pyrite
reaction mechanism
TG
Opis:
A sulfidization roasting-flotation process was usually viewed to be effective in treating the refractory oxide ore. In this paper, pyrite was proposed to be applied as a potential vulcanizing reagent to transform PbO or its surface to PbS based on feasibilities of technology and economy. The evolution process, phase and characteristics of crystal growth were investigated by TG, XRD and SEM-EDS, respectively, to interpret the interaction mechanism of lead oxide and pyrite at high temperature. It was found that the decomposition process of pyrite under argon atmosphere was a slow process of sulfur released from FeS2 to FexS, which made the process easier to be controlled. When PbO was introduced into the system, the initial solid-solid (PbO-FeS2) reaction and prevailing solid-gas (PbO-S2(g)) reaction occurred at about 500 °C and 700 °C, respectively. Combined with the SEM-EDS analyses results, the optimal temperature for the sulfidization of PbO should be in the range of 700-750 °C.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 2; 270-277
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inter-frame Prediction with Fast Weighted Low-rank Matrix Approximation
Autorzy:
Huang, Z. L.
Hsiao, H. F.
Powiązania:
https://bibliotekanauki.pl/articles/227337.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
inter-frame prediction
template matching
block matching
low-rank matrix approximation
weighted low rank
matrix approximation
Opis:
In the field of video coding, inter-frame prediction plays an important role in improving compression efficiency. The improved efficiency is achieved by finding predictors for video blocks such that the residual data can be close to zero as much as possible. For recent video coding standards, motion vectors are required for a decoder to locate the predictors during video reconstruction. Block matching algorithms are usually utilized in the stage of motion estimation to find such motion vectors. For decoder-side motion derivation, proper templates are defined and template matching algorithms are used to produce a predictor for each block such that the overhead of embedding coded motion vectors in bit-stream can be avoided. However, the conventional criteria of either block matching or template matching algorithms may lead to the generation of worse predictors. To enhance coding efficiency, a fast weighted low-rank matrix approximation approach to deriving decoder-side motion vectors for inter frame video coding is proposed in this paper. The proposed method first finds the dominating block candidates and their corresponding importance factors. Then, finding a predictor for each block is treated as a weighted low-rank matrix approximation problem, which is solved by the proposed column-repetition approach. Together with mode decision, the coder can switch to a better mode between the motion compensation by using either block matching or the proposed template matching scheme.
Źródło:
International Journal of Electronics and Telecommunications; 2013, 59, 1; 9-16
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An application of feedback linearization to the tracking and almost disturbance decoupling control of nonlinear system with uncertainties
Autorzy:
Chen, C.-C.
Huang, Y.-C
Lin, W.-J.
Shen, D.-C.
Huang, L.-A.
Powiązania:
https://bibliotekanauki.pl/articles/970382.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
almost disturbance decoupling
feedback linearizable
differential geometry approach
composite Lyapunov approach
Opis:
This paper studies the tracking and almost disturbance decoupling problem of nonlinear systems with uncertainties, based on the feedback linearization approach. The main contribution of this study is to construct a controller, under appropriate conditions, such that the resulting closed-loop system is valid for any initial condition and bounded tracking signal with the following characteristics: input-to-state stability with respect to disturbance inputs and almost disturbance decoupling, i.e., the influence of disturbances on the L2 norm of the output tracking error can be arbitrarily attenuated by changing some adjustable parameters. Two examples, which cannot be solved by the first paper on the almost disturbance decoupling problem, are proposed in this paper to exploit the fact that the tracking and the almost disturbance decoupling performances are easily achieved by the proposed approach. In order to demonstrate the practical applicability, the paper has investigated the AMIRA ball and beam system.
Źródło:
Control and Cybernetics; 2007, 36, 2; 385-403
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pharmacokinetics of diclofenac sodium injection in swine
Autorzy:
Yang, H.F.
Li, Y.J.
Li, Y.Y.
Huang, C.
Huang, L.X.
Bu, S.J.
Powiązania:
https://bibliotekanauki.pl/articles/2087550.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
diclofenac sodium injection
pharmacokinetics
bioavailability
swine
HPLC
Źródło:
Polish Journal of Veterinary Sciences; 2019, 2; 423-426
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Precise and High Speed Charge-Pump PLL Model Based on SystemC/SystemC-AMS
Autorzy:
Ma, K.
Van Leuken, R.
Vidojkovic, M.
Romme, J.
Rampu, S.
Pflug, H.
Huang, L.
Dolmans, G.
Powiązania:
https://bibliotekanauki.pl/articles/227120.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
SystemC/SystemC-AMS
phase locked loop PLL
radio frequency
mixed-signal modeling
hardware description language
Opis:
The Phase Locked Loop (PLL) has become an important part of electrical systems. When designing a PLL, an efficient and reliable simulation platform for system evaluation is needed. However, the closed loop simulation of a PLL is time consuming. To address this problem, in this paper, a new PLL model containing both digital and analog parts based on SystemC/SystemC-AMS (BETA version) is presented. Many imperfections such as Voltage Control Oscillator (VCO) noise or reference jitter are included in this model. By comparing with the Matlab model, the SystemC/SystemC-AMS model can dramatically reduce simulation time. Also, by comparing with Analog Devices ADI SimPLL simulation results, Cadence simulation results and real measurement results, the accuracy of the SystemC/SystemC-AMS model is demonstrated. The paper shows the feasibility of a unified design environment for mixed-signal modelling based on SystemC/SystemC-AMS in order to reduce the cost and design time of electrical systems.
Źródło:
International Journal of Electronics and Telecommunications; 2012, 58, 3; 225-232
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ubiquitiform in applied mechanics
Autorzy:
Ou, Z.-C.
Li, G.-Y.
Duan, Z.-P.
Huang, F-L.
Powiązania:
https://bibliotekanauki.pl/articles/279395.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
ubiquitiform
fractal
Hausdorff dimension
Opis:
We demonstrate that a physical object in nature should not be described as a fractal, despite an ideal mathematical object, rather a ubiquitiform (a terminology coined here for a finite order self-similar or self-affine structure). It is shown mathematically that a ubiquitiform must be of integral dimension, and that the Hausdorff dimension of the initial element of a fractal changes abruptly at the point at infinity, which results in divergence of the integral dimensional measure of the fractal and makes the fractal approximation to a ubiquitiform unreasonable. Therefore, instead of the existing fractal theory in applied mechanics, a new type of ubiquitiformal one is needed.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 1; 37-46
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accelerated storage degradation testing and failure mechanisms of aerospace electromagnetic relay
Badania przyspieszone degradacji w czasie składowania przekaźników elektromagnetycznych stosowanych w przemyśle lotniczym oraz mechanizmów ich uszkodzeń
Autorzy:
Wang, Z. B.
Shang, S.
Wang, J.-W.
Huang, Z.-L.
Sai, F.
Powiązania:
https://bibliotekanauki.pl/articles/302000.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
electrical contact
electromagnetic relay
failure mechanisms
storage reliability
degradation testing
Styk elektryczny
przekaźnik elektromagnetyczny
mechanizmy uszkodzeń
niezawodność składowania
badania degradacji
Opis:
It is difficult to obtain the failure data of high-reliability and long-lifetime aerospace electromagnetic relay (EMR), even if based on the traditional accelerated storage life testing method. Based on the reliability test technique, the scheme of accelerated degradation testing for aerospace EMR was designed. The test system of aerospace electromagnetic relay storage parameters under temperature-accelerated stress was designed and developed. The most past research on storage reliability of relay only focuses on the measurement of contact resistance. The relay time parameters (pick-up time, opening time, overtravel time, rebound duration time, etc.) which reflect main performance function were not monitored. So, in this study the relay time parameters and relay contact resistance were detected simultaneously. According to the analysis on experiment results of contact resistance, relay time parameters, the degradation phenomena of aerospace EMR in long-term storage are investigated, which provides the bases for determining degradation sensitive parameters. Finally, based on the structure and function of aerospace EMR, the storage failure mechanism is investigated by conductive properties themselves. The microscopic morphology and changes in chemical elements for relay contact surface was analyzed by SEM and EDX regularly, which provide references for the relay storage failure mechanism.
Ze względu na wysoką niezawodność i długi cykl życia przekaźników elektromagnetycznych stosowanych w przemyśle lotniczym (EMR), trudno jest uzyskać dane o ich uszkodzeniach, nawet gdy korzysta się z tradycyjnej metody przyspieszonych badań dopuszczalnego okresu składowania. W przedstawionym artykule, opracowano, w oparciu o technikę badania niezawodności, schemat przyspieszonego badania degradacji przekaźników elektromagnetycznych stosowanych w lotnictwie. Zaprojektowano i zpracowano system oceny parametrów składowania przekaźników elektromagnetycznych używanych w lotnictwie w warunkach przyspieszonych przy skrajnych temperaturach. Ostatnie badania nad niezawodnością składowania przekaźników koncentrują się wyłącznie na pomiarze rezystancji styku. Nie były w nich monitorowane parametry czasowe przekaźnika (czas załączania, czas otwarcia, czas opóźnienia, czas trwania odbicia itp.), które odzwierciedlają jego główne funkcje. W przedstawionych badaniach mierzono jednocześnie parametry czasowe przekaźników i rezystancję styków. W oparciu o analizę uzyskanych wyników doświadczeń, badano zjawiska degradacji EMR podczas ich długoterminowego składowania, co stanowiło podstawę do wyznaczenia parametrów wrażliwych na degradację. Wreszcie, w oparciu o strukturę i funkcje EMR, badano mechanizm powstawania uszkodzeń podczas ich składowania na podstawie właściwości przewodzących. Prowadzone regularnie metodami SEM i EDX analizy budowy mikroskopowej oraz przemian pierwiastków chemicznych zachodzących na powierzchni styków przekaźnika stanowią odniesienie dla badań mechanizmu powstawania uszkodzeń podczas składowania przekaźników.
Źródło:
Eksploatacja i Niezawodność; 2017, 19, 4; 530-541
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł

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