Autor: Zhou, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Optimized design and analysis of offshore Beidou maritime foundation reinforcement system pseudolite ranging-codes
Autorzy:: Su, D.
Zhou, A.
Zhou, Z.
Chen, W.
Powiązania:: https://bibliotekanauki.pl/articles/260498.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: Beidou pseudolite
ranging-codes
optimized
3-taps
Opis:: Under the bad sea conditions and weak Beidou navigation signal environment, it is difficult to locate the ship on the sea, and the Beidou navigation system can’t work well. Beidou pseudolite system can improve the performance of Beidou navigation system as a navigation signal transmitter fixed on the ground, the signal of which can improve satellite positioning constellation structure, and improve the system availability reliability and precision. In order to ensure the interoperability and non-correlation of the Beidou pseudolite and the Beidou navigation system, the pseudolite ranging-codes should be selected in the same code space of the satellite ranging-codes and the residual pseudo random code generated by the 2 taps design scheme does not satisfy the performance requirements of the ranging-codes. To solve this issue, a combined design scheme with 3 taps is proposed, and 12 kinds of pseudolite ranging-codes are optimally selected according to the optimum design parameters of ranging-codes. The waveform and correlation of the selected pseudolite ranging-codes are analyzed by MATLAB, the acquisition simulation is carried out by using the new pseudolite ranging-codes. The experimental results show that the new 3-taps based ranging codes design scheme behaves a good balance, correlation and spectral characteristics.
Źródło:: Polish Maritime Research; 2017, S 2; 45-52
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Application study on cooperative drainage technology for mining-affected pressure relief gas in overlaying adjacent seams
Badanie zastosowania połączonej technologii odprowadzania gazu dla gazu rozprężonego w przyległych pokładach złożowych
Autorzy:: Wang, K.
Zang, J.
Zhou, A.
Gao, H.
Powiązania:: https://bibliotekanauki.pl/articles/348651.pdf
Data publikacji:: 2012
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: przyległe pokłady węgla
odmetanowanie
wzbogacenie strefy
technologia łączonego odprowadzania gazu
overlaying adjacent seams
mining-affected pressure relief gas
zoning enrichment
cooperative drainage technology
Opis:: During the mining process of 12# coal seam in Yangquan mine area, gas quantity emitting from overlaying adjacent seams was high and gas concentration in upper corners and return airways of mining faces often exceeded limitation. To solve these problems, through the combination of theoretical study, numerical simulation and on-site observation, the high-low zoning enrichment law of the mining-affected pressure relief gas in overlaying adjacent seams of 12# coal seam was formulated. According to this law, the cooperative drainage technology was proposed, namely arranging the high-located and low-located boreholes to drain the gas respective in high and low enrichment zones. By applying the cooperative drainage technology, the safety production status of mining faces of 12# coal seam in Nanzhuang mine has been significantly ameliorated, advance efficiency, drainage rate and drainage quantity have been improved greatly, carbon emission has been reduced and the environment has been protected, resource utilization has been improved, the service life of the mine will be extended. In a word, good economic, social and environmental benefits have been achieved, meanwhile, a safe, efficient, and sustainable exploitation of the mine has been realized.
Podczas eksploatacji ściany nr 12 w Yangquan zanotowano dużą ilość gazu wydobywającego się z przyległych pokładów węgla. Koncentracja metanu w chodniku nadścianowym bardzo często przekraczała wartości dopuszczalne. Aby rozwiązać te problemy, sformułowano zasadę wysokiego/niskiego odmetanowania dla dekompresji metanu w przyległych do ściany nr 12 pokładach węgla na podstawie symulacji numerycznych oraz obserwacji. W odniesieniu do tej zasady zaproponowano technologię łączonego odprowadzania gazu poprzez otwory wiertnicze zlokalizowane odpowiednio na niższym i wyższym poziomie odpowiednich stref metanowości. Zastosowanie technologii odprowadzania łączonego przyczyniło się do znacznej poprawy bezpieczeństwa produkcji na przodku nr 12 kopalni Nanzhuang, zwiększenia wydajności, prędkości odprowadzania i ilości odprowadzanego gazu, obniżenia emisji dwutlenku węgla oraz lepszej ochrony środowiska, a także lepszego wykorzystania zasobów i wydłużenia okresu eksploatacji kopalni. Krótko mówiąc, uzyskano znaczne korzyści ekonomiczne, społeczne i środowiskowe, przy jednoczesnym zapewnieniu bezpiecznej, wydajnej i zrównoważonej eksploatacji kopalni.
Źródło:: AGH Journal of Mining and Geoengineering; 2012, 36, 3; 385-393
1732-6702
Pojawia się w:: AGH Journal of Mining and Geoengineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Experimental and mathematical investigations on unconfined compressive behaviour of costal soft soil under complicated freezing processes
Autorzy:: Wang, W.
Li, N.
Zhang, F.
Zhou, A.
Chi, S.
Powiązania:: https://bibliotekanauki.pl/articles/259246.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: costal soft soil
stress-strain curve model
unconfined compressive behavior
freezing-thawing circle
Opis:: In order to properly understand the effect of freezing-thawing circle (FTC) to mechanical behavior of costal soft soil (CSS), unconfined compressive test is conducted. Six kind FTC times are designed from zero to five. The tested data show that: (1) unconfined compressive strength of CCS decreases nonlinearly with more FTC, and the strength after five FTC times becomes about 22% of its original strength without any freezing-thawing experience; (2) stressstrain curves of all unconfined compressive samples can be well fitted by three-parameter hyperbolic model; (3) and relationship between two parameters and FTC times can be fitted by exponent function, while another parameter can be considered as 0.95. Consequently, one composite hyperbolic- exponent empirical formula is established in order to describe freezing-thawing-dependent stress-strain behavior of CSS. Finally, good agreements have been found between tested dada and simulated results.
Źródło:: Polish Maritime Research; 2016, 4; 112-116
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Precision acoustic navigation for remotely operated vehicles (ROV)
Autorzy:: Zieliński, A.
Zhou, L.
Powiązania:: https://bibliotekanauki.pl/articles/985799.pdf
Data publikacji:: 2005
Wydawca:: Polskie Towarzystwo Akustyczne
Opis:: The ability to navigate a ROV to exact bottom locations or along a precise path is essential to many scientific and engineering tasks. Bottom and water column surveys along a precise and repeatable trajectory allow the monitoring of chemical and physical variables, and the study of sedimentation processes and biological phenomena. Precise navigation is also required for high-resolution synthetic sonar observations and for placement and retrieval of various devices on the bottom. This paper reviews principles behind acoustic navigation and provides a survey of commercially available Ultra-Short Baseline (USBL) navigation systems. A novel high precision navigation system is proposed that offers several advantages over the surveyed systems. Specifically, the precise position and trajectory of a ROV tethered by a cable to a bottom node is obtained using sensitive phase measurement of an acoustic signal. Proof of this concept through shallow-water and deep-water prototypes will be carried out shortly at the University of Victoria.
Źródło:: Hydroacoustics; 2005, 8; 255-264
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Fast and unique Tucker decompositions via multiway blind source separation
Autorzy:: Zhou, G.
Cichocki, A.
Powiązania:: https://bibliotekanauki.pl/articles/201572.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Multiway Blind Source Separation (MBSS)
Multilinear Independent Component Analysis (MICA)
Constrained tensor decompositions
Tucker models
Nonnegative Tucker Decomposition (NTD)
Opis:: A multiway blind source separation (MBSS) method is developed to decompose large-scale tensor (multiway array) data. Benefitting from all kinds of well-established constrained low-rank matrix factorization methods, MBSS is quite flexible and able to extract unique and interpretable components with physical meaning. The multilinear structure of Tucker and the essential uniqueness of BSS methods allow MBSS to estimate each component matrix separately from an unfolding matrix in each mode. Consequently, alternating least squares (ALS) iterations, which are considered as the workhorse for tensor decompositions, can be avoided and various robust and efficient dimensionality reduction methods can be easily incorporated to pre-process the data, which makes MBSS extremely fast, especially for large-scale problems. Identification and uniqueness conditions are also discussed. Two practical issues dimensionality reduction and estimation of number of components are also addressed based on sparse and random fibers sampling. Extensive simulations confirmed the validity, flexibility, and high efficiency of the proposed method. We also demonstrated by simulations that the MBSS approach can successfully extract desired components while most existing algorithms may fail for ill-conditioned and large-scale problems.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 3; 389-405
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Optical solitons in birefringent fibers with parabolic law nonlinearity
Autorzy:: Zhou, Q.
Zhu, Q.
Biswas, A.
Powiązania:: https://bibliotekanauki.pl/articles/174318.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: solitons
parabolic law nonlinearity
birefringent fibers
Jacobian elliptic equation
Riccati
equation
Opis:: This paper studies the propagation of optical solitons through birefringent fibers with parabolic law nonlinearity. The Hamiltonian perturbations that are inter-modal dispersion, self-steepening, third-order dispersion and nonlinear dispersions are taken into account. Both, Riccati equation expansion method and Jacobian elliptic equation expansion method are used. Finally, analytical solutions that are Jacobian elliptic periodic traveling wave solutions, periodic solutions, unbounded solutions, singular solutions, bright and dark soliton solutions are obtained under several constraint conditions.
Źródło:: Optica Applicata; 2014, 44, 3; 399-409
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Boiling, steaming or rinsing? (the physics of chinese cuisine)
Gotować, gotować na parze czy może płukać? (fizyka kuchni chińskiej)
Autorzy:: Varlamov, A.
Zhou, Z.
Chen, Y.
Powiązania:: https://bibliotekanauki.pl/articles/129558.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:: complex organic molecules
proteins
damplings
heat transfer
temperature conductivity
Fourier law
Newton's law of cooling
złożone molekuły organiczne
proteiny
kluski
przenoszenie ciepła
przewodnictwo temperaturowe
prawo Fouriera
Newtonowskie prawo chłodzenia
Opis:: Some physical aspects of Chinese cuisine are discussed. We start from the cultural and historical particularities of Chinese cuisine and their food production technologies. What is the difference between raw and boiled meat? What is the difference in the physical processes of heat transfer during either the steaming of dumplings or during cooking them in boiling water? Why is it possible to cook meat stripes in a "hot pot" in ten seconds, whilst baking a turkey requires several hours? This article is devoted to a discussion of these questions.
W artykule zostały przedyskutowane niektóre aspekty kuchni chińskiej. Autorzy zaczynają od omówienia szczegółów kuchni chińskiej i technologii produkcji żywności. Autorzy zadają następujące pytania: jaka jest różnica pomiędzy mięsem surowym a gotowanym? Jaka jest różnica w fizyce procesu przenoszenia ciepła podczas przyrządzania klusków na parze wodnej a w gotującej się wodzie? Dla czego jest możliwe przyrządzanie kawałków mięsa w "gorącym garnku" w ciągu kilku sekund, podczas gdy po to, aby upiec indyka potrzebujemy kilku godzin? Artykuł ten udziela odpowiedzi na te i inne pytania.
Źródło:: Physics for Economy; 2018, 2, No.1; 55-68
2544-7742
2544-7750
Pojawia się w:: Physics for Economy
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Ocean average current measurement using acoustic phase monitoring
Autorzy:: Zieliński, A.
Zhou, L.
Butowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/331688.pdf
Data publikacji:: 2008
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: ocean-related activities
acoustic phase monitoring
hydroacoustic
Opis:: Knowledge of water currents is important in several ocean-related activities. Typically, current speed and direction are measured at a certain fixed location and depth (or depth profile) by a suitable current meter. In this paper, we propose a novel method for average current speed measurement along a path, based on acoustic phase monitoring. In this method, a transmitter and a receiver are installed at the ends of a designated path. A transmitted sinusoidal signal propagates along the path to the receiver. Intervening currents will introduce Doppler frequency shifts that can be measured as a rate of phase change in the received signal. The phase is recovered by means of a phase detector and unwrapping techniques. The desirable feature of the proposed method is that average current speed is monitored along the entire path. Moreover, the estimated frequency shift via the phase measurement achieves a higher accuracy in current measurement than does a measure of frequency directly by an FM demodulator.
Źródło:: Hydroacoustics; 2008, 11; 459-467
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Comparison of Flux Pinning in Single Crystals and Melt-Textured YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-x}$
Autorzy:: Puźniak, R.
Wiśniewski, A.
Baran, M.
Zhou, L.
Powiązania:: https://bibliotekanauki.pl/articles/2012973.pdf
Data publikacji:: 2000-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.60.Ge
74.60.Jg
74.72.Bk
Opis:: Flux pinning properties of single crystals and melt-textured samples of YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-x}$ were studied for external magnetic field oriented parallel and perpendicular to the CuO$\text{}_{2}$ planes (ab-planes). For H ∥ ab vortex behaviour is mainly determined by a very effective intrinsic pinning mechanism. The irreversibility line is located in the region of higher fields and temperatures in comparison with the irreversibility line for H ⊥ ab. In a single crystal for H ⊥ ab, we observed an increase in the critical current density j$\text{}_{c}$ with magnetic field - the so-called "fishtail effect" - in a very broad temperature range. For H ∥ ab, this effect is observed only at temperatures close to T$\text{}_{c}$, when the intrinsic pinning is much weaker.
Źródło:: Acta Physica Polonica A; 2000, 97, 3; 373-376
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Effect of pH and time on hydrodynamic properties of dodecylamine
Autorzy:: Zhou, X.
Tan, Y. H.
Finch, J. A.
Powiązania:: https://bibliotekanauki.pl/articles/109853.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: pH
dodecylamine
gas holdup
froth height
Frother function
Opis:: Gas holdup and froth height in the presence of dodecylamine (DDA, pKa = 10.63) are reported at three pH values. The results revealed a strong time effect for DDA: stability was reached at pH 3; not at natural pH, for example, gas holdup declining to the water only value; and at pH 11, while stability was reached quickly gas holdup was now less than in water alone indicating coalescence. In the first two cases, the time effect is attributed to loss of amine from the system as molecular amine, observed at natural pH as precipitates on the column wall. An argument for precipitation at pH < pKa is presented. At pH 11, coalescence is attributed to the oily nature of the molecular amine present as colloidal aggregates. Noting a difference in literature steady state gas holdup data at natural pH, it is speculated that varying steady states can be reached that corresponds to different levels of amine loss.
Źródło:: Physicochemical Problems of Mineral Processing; 2018, 54, 4; 1237-1244
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Yellowfin tuna (Thunnusalbacares) fishing ground forecasting model based on bayes classifier in the South China Sea
Autorzy:: Zhou, W.
Li, A.
Ji, S.
Qiu, Y.
Powiązania:: https://bibliotekanauki.pl/articles/258994.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: Bayes classifier
South China Sea
yellowfin tuna
fishing ground forecasting
Opis:: Using the yellowfin tuna (Thunnusalbacares,YFT)longline fishing catch data in the open South China Sea (SCS) provided by WCPFC, the optimum interpolation sea surface temperature (OISST) from CPC/NOAA and multi-satellites altimetric monthly averaged product sea surface height (SSH) released by CNES, eight alternative options based on Bayes classifier were made in this paper according to different strategies on the choice of environment factors and the levels of fishing zones to classify the YFT fishing ground in the open SCS. The classification results were compared with the actual ones for validation and analyzed to know how different plans impact on classification results and precision. The results of validation showed that the precision of the eight options were 71.4%, 75%, 70.8%, 74.4%, 66.7%, 68.5%, 57.7% and 63.7% in sequence, the first to sixth among them above 65% would meet the practical application needs basically. The alternatives which use SST and SSH simultaneously as the environmental factors have higher precision than which only use single SST environmental factor, and the consideration of adding SSH can improve the model precision to a certain extent. The options which use CPUE’s mean ± standard deviation as threshold have higher precision than which use CPUE’s 33.3%-quantile and 66.7%-quantile as the threshold
Źródło:: Polish Maritime Research; 2017, S 2; 140-146
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Comparative study on the classification methods for breast cancer diagnosis
Autorzy:: Qiu, Y.
Zhou, G.
Zhao, Q.
Cichocki, A.
Powiązania:: https://bibliotekanauki.pl/articles/200743.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: breast cancer
mammography
DDSM
comparative study
deep learning
rak piersi
mammografia
Badanie porównawcze
uczenie głębokie
Opis:: Digital mammography is one of the most widely used approaches for breast cancer diagnosis. Many researchers have demonstrated the superiority of machine learning methods in breast cancer diagnosis using different mammography databases. Since these methods often have different pros and cons, which may confuse doctors and researchers, an elaborate comparison and examination among them is urgently needed for practical breast cancer diagnosis. In this study, we conducted a comprehensive comparative study of the state-of-the-art machine learning methods that are promising in breast cancer diagnosis. For this purpose we analyze the largest mammography diagnosis database: Digital Database for Screening Mammography (DDSM). We considered various approaches for feature extraction including principal component analysis (PCA), nonnegative matrix factorization (NMF), spatial-temporal discriminant analysis (STDA) and those for classification including linear discriminant analysis (LDA), random forests (RaF), k-nearest neighbors (kNN), as well as deep learning methods including convolutional neural networks (CNN) and stacked sparse autoencoder (SSAE). This paper can serve as a guideline and useful clues for doctors who are going to select machine learning methods for their breast cancer computer-aided diagnosis (CAD) systems as well for researchers interested in developing more reliable and efficient methods for breast cancer diagnosis.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 6; 841-848
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Przykłady wykorzystania modelowania neuronowego w praktyce rolniczej
Examples of the use of neural modeling in agricultural practice
Autorzy:: Przybylak, A.
Boniecki, P.
Zaborowicz, M.
Mo, Zhou
Przybyl, K.
Powiązania:: https://bibliotekanauki.pl/articles/883761.pdf
Data publikacji:: 2013
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:: sieci neuronowe sztuczne
wykorzystanie
modelowanie neuronowe
modele klasyfikacyjne
system ObrazKoh
system Szkodniki
modele prognostyczne
system Neuronet
system Plon 1.0
system PrognozaPlony
system ProgAzot 1.1
Źródło:: Technika Rolnicza Ogrodnicza Leśna; 2013, 1
1732-1719
2719-4221
Pojawia się w:: Technika Rolnicza Ogrodnicza Leśna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Fabrication of $Si_{1-x}Ge_x$ Alloy on Silicon by Ge-Ion-Implantation and Short-Time-Annealing
Autorzy:: Gao, K.
Prucnal, S.
Mücklich, A.
Skorupa, W.
Zhou, S.
Powiązania:: https://bibliotekanauki.pl/articles/1400450.pdf
Data publikacji:: 2013-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.72.uf
78.55.Ap
68.37.Lp
Opis:: In our contribution we present the fabrication of $Si_{1-x}Ge_x$ alloy by ion-implantation and millisecond flash lamp annealing. The 100 keV Ge ions at the fluence of $10 \times 10^{16}, 5 \times 10^{16}$, and $3 \times 10^{16} cm^{-2}$ were implanted into monocrystalline (100)-oriented Si wafers covered by 50 nm thermal oxide. In the consequence, the 50 nm amorphous Ge rich Si layers were obtained. The recrystallization of the implanted layers and the $Si_{1-x}Ge_x$ alloying were accomplished by flash lamp annealing with the pulse duration of 20 ms. Flash lamp treatment at high energy densities leads to local melting of the Ge-rich silicon layer. Then the recrystallization takes place due to the millisecond range liquid phase epitaxy. Formation of the high quality monocrystalline $Si_{1-x}Ge_x$ layer was confirmed by the μ-Raman spectroscopy, the Rutherford backscattering channeling and cross-sectional transmission electron microscopy investigation. The μ-Raman spectra reveal three phonon modes located at around 293, 404, and $432 cm^{-1}$ corresponding to the Ge-Ge, Si-Ge and Si-Si in the $Si_{1-x}Ge_x$ alloy vibrational modes, respectively. Due to much higher carrier mobility in the $Si_{1-x}Ge_x$ layers than in silicon such system can be used for the fabrication of advanced microelectronic devices.
Źródło:: Acta Physica Polonica A; 2013, 123, 5; 858-861
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: A review on mineral waste for chemical-activated binders: mineralogical and chemical characteristics
Autorzy:: Sedira, N.
Castro-Gomes, J.
Kastiukas, G.
Zhou, X.
Vargas, A.
Powiązania:: https://bibliotekanauki.pl/articles/89164.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:: mineral waste
mining waste
alkali activated materials
alkaline solutions
chemical composition
Opis:: This review discusses the potential of alkali-activated materials obtained from mineral waste. A brief historical background on alkali-activated materials is presented. Recent advances in the development of binders obtained from mineral wastes and alkali-activated solutions are described. The scope of this state of the art review is to identify current knowledge in support that mineral waste can be used for the production of alkali-activated binders. In addition, this review identifies the chemical activators that can be effectively utilized for such purposes in the age when wastes are still viewed by industry as dis-posable. Some mineral wastes which are discussed can be viewed as a new resource for recycling and recovery which will offer important economic and social benefits.
Źródło:: Mining Science; 2017, 24; 29-58
2300-9586
2353-5423
Pojawia się w:: Mining Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 16.

Tytuł:: Dark and singular optical solitons with competing nonlocal nonlinearities
Autorzy:: Zhou, Q.
Liu, L.
Zhang, H.
Mirzazadeh, M.
Bhrawy, A. H.
Zerrad, E.
Moshokoa, S.
Biswas, A.
Powiązania:: https://bibliotekanauki.pl/articles/949415.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: solitons
parabolic law nonlinearity
competing nonlinearities
Opis:: In this work, we study the dynamics of optical solitons in a synthetic nonlocal nonlinear media. The nonlinear dynamical model which describes the propagation of optical solitons in the weakly nonlocal nonlinear media with parabolic law nonlinearity is investigated analytically. The tool of integration that is the Riccati equation mapping approach is introduced to extract exact traveling wave solutions. As a result, an explicit dark soliton, singular soliton and periodic solutions are derived.
Źródło:: Optica Applicata; 2016, 46, 1; 79-86
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 17.

Tytuł:: Image compression-encryption algorithm combining compressive sensing with log operation
Autorzy:: Chen, R.-L.
Zhou, Y.
Luo, M.
Zhang, A.-D.
Gong, L.-H.
Powiązania:: https://bibliotekanauki.pl/articles/174009.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: image encryption
image compression
compressive sensing
log operation
Opis:: Based on compressive sensing and log operation, a new image compression-encryption algorithm is proposed, which accomplishes encryption and compression simultaneously. The proposed image compression-encryption algorithm takes advantage of not only the physical realizability of partial Hadamard matrix, but also the resistance of the chosen-plaintext attack since all the elements in the partial Hadamard matrix are 1, –1 or log 1 = 0. The proposed algorithm is sensitive to the key and it can resist various common attacks. The simulation results verify the validity and reliability of the proposed image compression-encryption algorithm.
Źródło:: Optica Applicata; 2018, 48, 4; 563-573
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 18.

Tytuł:: Embedded Solitons and Conservation Law with $χ^{(2)}$ and $χ^{(3)}$ Nonlinear Susceptibilities
Autorzy:: Savescu, M.
Kara, A.
Kumar, S.
Krishnan, E.
Zaka Ullah, M.
Moshokoa, S.
Zhou, Qin
Biswas, A.
Powiązania:: https://bibliotekanauki.pl/articles/1398312.pdf
Data publikacji:: 2017-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: solitons
χ^{(2)}
conservation laws
Opis:: This paper studies embedded solitons that are confined to continuous spectrum, with $χ^{(2)}$ and $χ^{(3)}$ nonlinear susceptibilities. Bright and singular soliton solutions are obtained by the method of undetermined coefficients. Subsequently, the Lie symmetry analysis and mapping method retrieves additional solutions to the model such as shock waves, singular solitons, cnoidal waves, and several others. Finally, a conservation law for this model is secured through the Lie symmetry analysis.
Źródło:: Acta Physica Polonica A; 2017, 131, 2; 297-303
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 19.

Tytuł:: III-V Quantum Dots in Dielectrics Made by Ion Implantation and Flash Lamp Annealing
Autorzy:: Prucnal, S.
Turek, M.
Gao, K.
Zhou, S.
Pyszniak, K.
Droździel, A.
Żuk, J.
Skorupa, W.
Powiązania:: https://bibliotekanauki.pl/articles/1400484.pdf
Data publikacji:: 2013-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.30.Fs
78.67.Hc
81.05.Ea
81.07.Ta
81.15.Lm
Opis:: Different semiconductor nanocrystals synthesized in dielectrics on silicon are very interesting for applications in non-volatile memories and photovoltaics. In this paper we present an overview of microstructural and opto-electronic properties of different III-V quantum dots embedded in $SiO_2$ and $Si_3N_4$ made by sequential ion implantation and millisecond range flash lamp annealing. It is shown that within 20 ms post-implantation annealing high quality crystalline III-V quantum dots can be formed in different matrices. Formation of crystalline III-V quantum dots was confirmed by cross-section transmission electron microscopy, photoluminescence and μ-Raman spectroscopy. Flash lamp annealing is essentially a single-flash-single-wafer technique whose main attributes are the ease and control of processing over large wafer batches.
Źródło:: Acta Physica Polonica A; 2013, 123, 5; 935-938
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 20.

Tytuł:: Influence of Flash Lamp Annealing on the Optical Properties of CIGS Layer
Autorzy:: Prucnal, S.
Jiao, F.
Reichel, D.
Zhao, K.
Cornelius, S.
Turek, M.
Pyszniak, K.
Drozdziel, A.
Skorupa, W.
Helm, M.
Zhou, S.
Powiązania:: https://bibliotekanauki.pl/articles/1199248.pdf
Data publikacji:: 2014-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 88.40.jn
61.72.Cc
78.55.Hx
Opis:: Copper indium gallium diselenide (CIGS) becomes more significant for solar cell applications as an alternative to silicon. The quality of the layer has a critical impact on the final efficiency of the solar cell. An influence of the post-deposition millisecond range flash lamp annealing on the optical and microstructural properties of the CIGS films was investigated. Based on the Raman and photoluminescence spectroscopy, it is shown that flash lamp annealing reduces the defect concentration and leads to an increase of the photoluminescence intensity by a factor of six compared to the nonannealed sample. Moreover, after flash lamp annealing the degradation of the photoluminescence is significantly suppressed and the absolute absorption in the wavelength range of 200-1200 nm increases by 25%.
Źródło:: Acta Physica Polonica A; 2014, 125, 6; 1404-1407
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki