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Tytuł:
Jeszcze jedna funkcja mikrobiologicznych ogniw paliwowych w oczyszczaniu ścieków: wytwarzanie wody o wysokiej jakości
One more function for microbial fuel cells in treating wastewater: producing high-quality water
Autorzy:
He, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1217973.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
mikrobiologiczne ogniwa paliwowe
bioenergia
osmoza wymuszona
membrany
oczyszczanie ścieków
microbial fuel cells
bioenergy
forward osmosis
membrane
wastewater treatment
Opis:
Zrównoważona technologia oczyszczania ścieków powinna skutecznie obniżać stężenie zanieczyszczeń, odzyskiwać energię i minimalizować zrzut cieczy. Potencjalnym kandydatem na taką technologię jest mikrobiologiczne ogniwo paliwowe (MFC - ang. Microbial Fuel Cell), które może wytwarzać bioelektryczność bezpośrednio z oczyszczania ścieków. Jednak oczyszczony ściek z MFC nie jest ponownie wykorzystywany z powodu niezadowalającej jakości wody. Do wytwarzania wody o wysokiej jakości za pomocą MFC zaproponowaliśmy i zbadaliśmy dwie metody wykorzystujące zintegrowane technologie membranowe. W szczególności osmotyczne MFC, w których wykorzystuje się osmozę wymuszoną (ang. forward osmosis) i MFC, okazały się wykonalne w badaniach na skalę laboratoryjną. Nowa funkcja polegająca na wytwarzaniu wody o wysokiej jakości, choć nadal stanowiąca duże wyzwanie, czyni z MFC obiecującą metodę ekologicznie zrównoważonego oczyszczania ścieków.
A sustainable wastewater treatment technology should effectively reduce contaminant concentration, recovery energy contents and minimize liquid discharge. A potential candidate for such a technology is a microbial fuel cell (MFC) that can produce bioelectricity directly from wastewater treatment. However, the treated effluent from MFCs is not reused because of unsatisfied water quality. To produce high-quality water using MFCs, we proposed and studied two approaches with integrated membrane technologies. Especially, the osmotic MFCs that take advantage of both forward osmosis and MFCs have been proven feasible with bench-scale studies. The new function of producing high-quality water, although still very challengeable, will make MFCs a promising approach for sustainable wastewater treatment.
Źródło:
Chemik; 2012, 66, 1; 3-10
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of low-sidelobe beampattern controlling methods for acoustic transmitting array of underwater vehicles
Autorzy:
He, Z.
Shi, Q.
Wu, S.
Powiązania:
https://bibliotekanauki.pl/articles/258624.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
underwater unmanned vehicles
detecting and positioning
acoustic transducer
complex array
low-sidelobe beamforming
Opis:
In underwater unmanned vehicles, complex acoustic transducer arrays are always used to transmitting sound waves to detect and position underwater targets. Two methods of obtaining low-sidelobe transmitting beampatterns for acoustic transmitting arrays of underwater vehicles are investigated. The first method is the boundary element model optimization method which used the boundary element theory together with the optimization method to calculate the driving voltage weighting vector of the array. The second method is the measured receiving array manifold vector optimization method which used the measured receiving array manifold vectors and optimization method to calculate the weighting vector. Both methods can take into account the baffle effect and mutual interactions among elements of complex acoustic arrays. Computer simulation together with experiments are carried out for typical complex arrays. The results agree well and show that the two methods are both able to obtain a lower sidelobe transmitting beampattern than the conventional beamforming method, and the source level for each transmitting beam is maximized in constraint of the maximum driving voltage of array elements being constant. The effect of the second method performs even better than that of the first method, which is more suitable for practical application. The methods are very useful for the improvement of detecting and positioning capability of underwater unmanned vehicles.
Źródło:
Polish Maritime Research; 2017, S 2; 103-110
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of ship rolling motion on take-off aerodynamic characteristics of aircraft
Autorzy:
He, Z.
Sun, X.
Gu, X.
Powiązania:
https://bibliotekanauki.pl/articles/259257.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship rolling motion
ski-jump take-off
Meshless method
WALE turbulence model
aerodynamic characteristics
Opis:
Ship motion is an important factor affecting on the safety of ski-jump take-off. The simplified frigate ship SFS1 was numerically simulated, and the results were compared with the experimental data, the feasibility of the calculation method was verified; Meshless method and WALE turbulence model were used to simulate the process of aircraft skijump take-off, aerodynamic characteristics under different rolling conditions during the aircraft ski-jump take-off process were presented. The results showed that: the influence of ship rolling motion on lift coefficient, drag coefficient and pitching moment was small, side force and rolling moment were greatly affected by rolling motion; the region of downwash with the maximum speed was about 10 m from the bow; the safety of ski-jump take-off was greatly affected when aircraft was close to the bow within 20 m.
Źródło:
Polish Maritime Research; 2018, S 2; 23-29
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mass transfer process of leaching weathered crust elution-deposited rare earth ore with magnesium salts
Autorzy:
Chen, Z.
Zhang, Z.
He, Z.
Chi, R.
Powiązania:
https://bibliotekanauki.pl/articles/110343.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
mass transfer
magnesium salts
theory plate
weathered crust elution-deposited rare earth ore
Opis:
In order to optimize the leaching process of weathered crust elution-deposited rare earth ore with magnesium salts, the influence of different flow rate, concentration of magnesium ions, initial pH of magnesium salts solution and experimental temperature on the mass transfer process of rare earth and aluminum was investigated in the case of using magnesium salts as leaching agent. The relationship between the flow rate μ and the HETP (Height Equivalent of Theoretical Plate) is in accordance with the Van Deemter equation when magnesium salts were used as leaching agent. The optimum condition for rare earth and aluminum were 0.4 cm3/min of flow rate and 0.2 mol/dm3 of magnesium ion concentration of magnesium sulfate, magnesium chloride and magnesium nitrate respectively. Under this condition the mass transfer efficiency of rare earth and aluminum with three kinds of magnesium salts follow the order of Mg(NO3)2>Mg(Cl)2>MgSO4. High temperature contributes to improving the mass transfer efficiency of rare earth and aluminum. Magnesium nitrate as the leaching agent can get the highest leaching mass transfer efficiency of rare earth and magnesium sulfate as the leaching agent can make the impurity leaching and mass transfer efficiency of Al is the lowest.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 3; 1004-1013
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Depth-resolved measurement of the compression displacement fields on the front and rear surfaces of an epoxy sample
Autorzy:
Zhang, W.
Dong, B.
He, Z.
Xie, S.
Zhou, Y.
Powiązania:
https://bibliotekanauki.pl/articles/174399.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
depth-resolved measurement
compression displacement field
wavenumber-scanning interferometry
epoxy
Opis:
Compression is one of the typical parameters measured in material mechanics. In this research, the compression displacement fields on the front and rear surfaces of an epoxy sample are measured by using a tilt depth-resolved wavenumber-scanning Michelson interferometer. The light source is a distributed feedback laser diode, the wavenumber of which can be modulated to about 1.017 × 104 m–1 by the temperature without mode hopping. A random-sampling Fourier transform is designed to evaluate the phase differences before and after the applied loads. Experimental results show that the depth-resolved measurement of the compression displacement field is of high accuracy. It can be used to analyze force propagation inside resin-based composites.
Źródło:
Optica Applicata; 2018, 48, 2; 311-323
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of HMX via Nitrolysis of DPT Catalyzed by Acidic Ionic Liquids
Autorzy:
He, Z.
Luo, J.
Lu, Ch.
Xu, R.
Li, J.
Powiązania:
https://bibliotekanauki.pl/articles/358495.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
DPT
HMX
nitrolysis
ionic liquid
Opis:
The direct nitrolysis of DPT to synthesize HMX with ionic liquids (ILs) as catalysts was investigated. The results showed that [Et3NH] HSO4 was the best catalyst among 18 ILs used and the yield of HMX was up to 61% against 45% without IL. The ILs could be effciently recovered by simple distillation and extraction after reaction without any apparent loss of catalytic activity even after 10 times recycling.
Źródło:
Central European Journal of Energetic Materials; 2011, 8, 2; 83-91
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A velocity measurement method based on scaling parameter estimation of chaotic system
Autorzy:
Liu, L.
Hu, J.
He, Z.
Han, C.
Li, H.
Li, J.
Powiązania:
https://bibliotekanauki.pl/articles/220466.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
signal processing
parameter estimation
chaos
synchronization
Opis:
In this paper, we propose a new method of measuring the target velocity by estimating the scaling parameter of a chaos-generating system. First, we derive the relation between the target velocity and the scaling parameter of the chaos-generating system. Then a new method for scaling parameter estimation of the chaotic system is proposed by exploiting the chaotic synchronization property. Finally, numerical simulations show the effectiveness of the proposed method in target velocity measurement.
Źródło:
Metrology and Measurement Systems; 2011, 18, 2; 275-281
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrostatic Hazards Assessment of Nitramine Explosives: Resistivity, Charge Accumulation and Discharge Sensitivity
Autorzy:
Peng, Q.
Cao, W.
Zhou, W.
He, Z.
Jiang, W.
Chen, W.
Powiązania:
https://bibliotekanauki.pl/articles/358757.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
nitramine explosives
electrostatic hazards
resistivity
charging characteristics
electrostatic discharge sensitivity
Opis:
The electrostatic hazards of nitramine explosives (RDX, HMX) were assessed in this paper. The resistivities of different particle-size RDX and HMX were tested by a device designed and manufactured according to the standard ISO/IEC 80079-20-2:2016. This work shows that the resistivities of uncompacted RDX and HMX increase as the particle size decreases. Charging characteristics test experiments were also carried out using a so-called sieve method. Using this method, the influence of aperture size on charge accumulation of RDX was studied, and the characteristics of electrostatic accumulation of different particle-size RDX and HMX sieved with 50 mesh standard sieve were compared. The results show that the absolute value of the charge accumulation increases as the mesh number increases (i.e. the aperture size decreases), and increases as the particle size is decreased, indicating that nano-sized RDX and nano-sized HMX accumulate static electricity more easily than conventional micron-sized ones. Finally, the electrostatic discharge (ESD) sensitivity of nano-sized RDX and nano-sized HMX was investigated. Nano-sized nitramine explosives were found to have a higher ESD sensitivity than micron-sized ones.
Źródło:
Central European Journal of Energetic Materials; 2016, 13, 3; 755-769
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineralogical and chemical characteristics of the lead-zinc tailing and contaminated soil from the mine tailing pond in Hunan Province (China)
Autorzy:
Li, C.
Zeng, L.
Fu, J.
Chen, J.
He, J.
He, Z.
Powiązania:
https://bibliotekanauki.pl/articles/110442.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
mineralogical characteristics
chemical fractionation
remediation
Opis:
The mineralogical and chemical characteristics of heavy metals in tailings and soils is an imperative for potential ecological risk assessment of metals to environment and heavy metals pollution prevention and control. The lead-zinc tailing and contaminated soil in and near the tailing pond were sampeled from a mine tailing pond in Hunan province (China), in which the chemical composition, phase composition and thermal behavior of tailing and soil were investigated. Furthermore, the petrography of lead-zinc tailing and chemical fractionations of Pb and Zn in the contaminated soil were studied in details. The mineral phases of lead-zinc tailing were galena, pyrite, chalcopyrite, sphalerite, quartz and fluorite, as distinguished by the reflected light microscopy and further proofed by the scanning electron microscope-energy dispersive spectrometer under the back scattered electron mode. Chemical fractionations were carried out by the European Community Bureau of Reference (BCR) sequential extraction procedure for Pb and Zn in the soil and the mild acido-soluble (F1), reducible (F2), oxidizable (F3), and residual (F4) fractions were 5.90, 75.24, 4.90 and 13.96% for Pb, and 47.74, 34.06, 9.59 and 8.61% for Zn, respectively. Subsequently, the individual contamination factor (ICF) of Pb and Zn were calculated as 6.16 and 10.61, respectively. The DTPA-available content of Pb and Zn in the contaminated soil were 39.9 and 170.7 mg·kg-1, respectively. The study provided a base for selecting remediation strategies in the studied area.
Źródło:
Physicochemical Problems of Mineral Processing; 2017, 53, 2; 1133-1147
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving Triggering Characteristics for a Surface-Flashover Triggered Vacuum Switch
Autorzy:
He, Z.
Wang, L.
Li, F.
Yao, W.
Dong, M.
Zhao, C.
Powiązania:
https://bibliotekanauki.pl/articles/1807889.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
52.80.Vp
52.75.Kq
52.25.Mq
Opis:
A surface-breakdown triggered vacuum switch with parallel disk electrodes and semiconductor surface flashover trigger electrode has many advantages, it is easy to be triggered and machined. The resistance of the trigger gap has been increased in terms of modifying the thickness of the semiconductor layer and improving coating process technology. The trigger gap resistance, trigger voltage and trigger waveforms were experimentally tested. The results show that the triggering characteristics can be improved by increasing the trigger resistance.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 1019-1021
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Survival potential of Phytophthora infestans sporangia in relation to environmental factors and late blight occurrence
Autorzy:
Olanya, O.M.
Anwar, M.
He, Z.
Larkin, R.P.
Honeycutt, C.W.
Powiązania:
https://bibliotekanauki.pl/articles/65009.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
survival
Phytophthora infestans
sporangia
environmental factor
late blight
occurrence
climate variability
potato
tomato
Opis:
Potato is an important crop globally and late blight (Phytophthora infestans) often results in severe crop loss. The cost for late blight control can be in excess of $210 million in the United States. We utilised a non-parametric density distribution analysis of local temperature (T) and relative humidity (RH), from 2005 to 2009, to assess and validate sporangia survival potential using survival model and late blight risks during the potato cropping season at Presque Isle, in the northern part of the state of Maine, USA. Modelbased analyses showed that ambient temperatures of 3−30°C and RH values of 45−100% were conducive for sporangia survival. Disease outbreaks and risk periods coincided with a high sporangia survival probability (15−35%). Due to the omission of solar radiation (SR) in the computation of survival potential in previous research, we applied a Cox proportional model to estimate the probability of sporangia survival [i.e. hazard at a specific time H(t)] as a function of baseline hazard (H0) and the influencing parameters. The model is: H(t) = H0(t) × exp(0.067ET + 0.138T + 0.083RH + 0.001SR) where ET is exposure time. The survival model indicated that RH (β = 0.083) and T (β = 0.138) were significant (p < 0.05) factors in sporangia survival in comparison to SR (β = 0.001). The hazard ratio, indicative of sporangia survival risk, varied with the predictors. For the unit increase of T, sporangia survival hazard increased by 1.148 times. The Cox model and sporangia hazard probabilities can be used for short-term disease forecasts based on the risk period most conducive for pathogen survival and targeted fungicide applications for optimum late blight management.
Źródło:
Journal of Plant Protection Research; 2016, 56, 1
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of hadronic rescattering on the elliptic flow after the hydrodynamics model
Autorzy:
Ma, G.
Ma, Y.
Sa, B.
Cai, X.
He, Z.
Huang, H.
Long, J.
Shen, W.
Zhong, Ch.
Chen, J.
Zuo, J.
Zhang, S.
Shi, X.
Powiązania:
https://bibliotekanauki.pl/articles/148372.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
elliptic flow
hydrodynamic model
hadronic rescattering
LUCIAE model
Opis:
Abstract A hydrodynamics + hadronic rescattering model is used to simulate Au+Au collisions at 200 GeV and a Cooper-Frye method is adopted for hadronization. The effect of hadronic rescattering on elliptic flow V2 in 20 40% Au+Au collisions at 200 GeV has been investigated. It is found that the hadronic rescattering can suppress elliptic flow V2 and makes an asymmetric system in momentum space tend to be less anisotropic. The suppression effect becomes weak with increasing transverse momentum. In addition, the effect of hadronic rescattering on transverse momentum spectra and anisotropy of hadronic coordinate space is presented.
Źródło:
Nukleonika; 2006, 51,suppl.3; 21-27
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Koncepcja systemu programowania zapalników czasowych do 120 mm naboi z pociskiem HE w czołgu Leopard
Conception of the electronic fuses programming system for Leopard battle tank
Autorzy:
Magier, M.
Bazela, R.
Powiązania:
https://bibliotekanauki.pl/articles/235177.pdf
Data publikacji:
2009
Wydawca:
Wojskowy Instytut Techniczny Uzbrojenia
Tematy:
amunicja działowa
zapalniki czasowe
gun ammunition
fuses time
Opis:
W pracy przedstawiono koncepcję systemu programowania 120 mm naboju z pociskiem HE do armaty czołgu LEOPARD, przeznaczonego do zwalczania śmigłowców w zawisie oraz zgrupowań piechoty i sprzętu lekkiego z górnej półsfery z wykorzystaniem doświadczeń z dotychczas opracowanych i wprowadzonych do uzbrojenia zapalników elektronicznych. Opracowanie w/w systemu radykalnie zwiększy możliwości zwalczania celów powietrznych w zawisie (śmigłowce odpalające ppk) oraz zgrupowania piechoty za ukryciem z wykorzystanie istniejącej czołgowej amunicji odłamkowo-burzącej.
In this paper, we present the conception of the electronic fuses programming system for LEOPARD battle tank.
Źródło:
Problemy Techniki Uzbrojenia; 2009, R. 38, z. 111; 113-122
1230-3801
Pojawia się w:
Problemy Techniki Uzbrojenia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania poligonowe naboi z pociskami odłamkowo-burzącymi HE i ćwiczebnymi HE-TP do 120mm armaty czołgu Leopard 2A4
Field tests of live and training cartridges with high explosive-fragmentation projectiles for Leopard tank 2A4 main gun
Autorzy:
Kuśnierz, T.
Powiązania:
https://bibliotekanauki.pl/articles/234948.pdf
Data publikacji:
2012
Wydawca:
Wojskowy Instytut Techniczny Uzbrojenia
Tematy:
Leopard 2A4
pocisk odłamkowo-burzący
badania poligonowe
high-explosive shell
field tests
Opis:
W artykule przedstawiono wyniki badań poligonowych naboi z pociskami odłamkowoburzącymi He (Pz-511) i ćwiczebnymi HE-TP (PZ-521) przeznaczonymi do 120mm armat czołgów LEOPARD 2A4. Wymieniona amunicja została opracowana przez Wojskowy Instytut Techniczny Uzbrojenia i wdrożona do produkcji przez Zakłady Produkcji Specjalnej w Pionkach.
Some results of field tests of live (PZ-511) and training cartridges (PZ-521) with high explosive- fragmentation projectiles designated for LEOPARD 2A4 tank 120 mm gun are presented in the paper. The ammunition was developed by the Military Institute of Armament Technology and put into the manufacture process at the Works of Special Production in Pionki.
Źródło:
Problemy Techniki Uzbrojenia; 2012, 41, 121; 59-67
1230-3801
Pojawia się w:
Problemy Techniki Uzbrojenia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heinkel He 178 – pierwszy na świecie samolot z napędem turboodrzutowym
Autorzy:
Michalski, Hubert.
Powiązania:
Technika Wojskowa Historia 2021, nr 3, s. 46-56
Data publikacji:
2021
Tematy:
Heinkel, Ernst (1888-1958)
Luftwaffe
Samoloty
Heinkel He 178 (samolot)
Budowa i konstrukcje
Dane taktyczno-techniczne sprzętu wojskowego
Artykuł z czasopisma historycznego
Artykuł z czasopisma wojskowego
Opis:
27 sierpnia 1939 roku odbył się pierwszy lot doświadczalnego samolotu z napędem odrzutowym. Prace nad samolotem finansowane były przez firmę „Ernst Heinkel Flugzeugwerke” w Warnemünde. Autor artykułu szczegółowo przedstawia przebieg prac nad budową silnika turboodrzutowego oraz przebieg kariery Ernsta Heinkla, niemieckiego konstruktora lotniczego.
Fotografie, rysunki, tabele.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Elastic (hμ)$\text{}_{1s}$ + He$\text{}^{++}$ Scattering and the Influence of Adiabatic Corrections on (Heμh)$\text{}^{++}$ Bound States
Autorzy:
Gronowski, J.
Czapliński, W.
Popov, N.
Powiązania:
https://bibliotekanauki.pl/articles/2041542.pdf
Data publikacji:
2004-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
34.60.+z
36.10.Gv
Opis:
Cross-sections for elastic scattering of muonic hydrogen on helium nuclei, (hμ)$\text{}_{1s}$ + He$\text{}^{++}$, where h and He$\text{}^{++}$ stands for a hydrogen and a helium isotope nucleus, respectively, were calculated in the one-level adiabatic approximation for a range of collision energies from 0 to 50 eV. Bound states and energy levels of (hμHe)$\text{}^{++}$ molecular ions were also calculated and compared with their Born-Oppenheimer counterparts. It is shown that adiabatic corrections are responsible for proper positions of the Ramsauer-Townsend minima in (hμ)$\text{}_{1s}$+He$\text{}^{++}$ elastic scattering and, at the same time, they significantly influence bound states and energy levels of (Heμh)$\text{}^{++}$ and (Heπh)$\text{}^{++}$ ions. Calculations were performed in the frame of the phase-function method.
Źródło:
Acta Physica Polonica A; 2004, 106, 6; 795-816
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ewolucja twórczej pracy dydaktycznej nauczycieli akademickich: relacja z badań
Evolution of didactic creative work of academic teachers: qualitative research report
Autorzy:
Okraj, Zofia
Powiązania:
https://bibliotekanauki.pl/articles/2149023.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet w Białymstoku. Wydział Pedagogiki i Psychologii
Tematy:
ewolucja twórczej pracy dydaktycznej
teoria ESA H.E. Grubera
evolution of creative didactic work
H.E. Grubers’ ESA theory
Opis:
Celem artykułu jest prezentacja wyników badań nad doświadczeniami nauczycieli akademickich w twórczej pracy dydaktycznej w aspekcie dotyczącym jej ewolucji na przestrzeni lat. Badania zostały przeprowadzone przy wykorzystaniu podejścia teoretyczno-metodologicznego The Evolving Systems Approach to Creative Work Howarda E. Grubera. Analiza i interpretacja zebranego materiału badawczego pochodzącego z wywiadów semistrukturyzowanych, analizy treści publikacji oraz analizy zdjęć z zajęć dydaktycznych prowadzonych przez badanych nauczycieli pozwoliła wyróżnić dwie fazy w rozwoju twórczej pracy dydaktycznej: pierwszy – intuicyjny, związany z poszukiwaniem „własnej drogi” w obszarze wybranych podejść/metod/technik kształcenia i drugi, związany z „odnalezieniem przestrzeni dla twórczych rozwiązań dydaktycznych” oraz typowymi dla tego etapu: przejściami między rolami”, a także progresem i transferem wiedzy i umiejętności dotyczących proponowanych rozwiązań.
The aim of the article is to present results of research into academic teachers’ experiences connected with didactic creative work in the aspect including evolution of it. The Evolving Systems Approach to Creative Work by Howard E. Gruber. Analysis and interpretation of research material derived from: semi-structured interviews, content analysis concerning teachers’ publications, and analysis of photos from didactic classes led by teachers allowed to distinguish two phases in the development of their didactic work. The first: intuitional connected with searching of „my own way” in the area of chosen: approaches/methods/techniques of education and the second connected with founding the space for creative didactic solutions and typical for this phase: progress and transfer the knowledge and skills regarding didactic solution proposed by them.
Źródło:
Parezja. Czasopismo Forum Młodych Pedagogów przy Komitecie Nauk Pedagogicznych PAN; 2020, 1(13); 83-98
2353-7914
Pojawia się w:
Parezja. Czasopismo Forum Młodych Pedagogów przy Komitecie Nauk Pedagogicznych PAN
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving separation efficiency of 6-1 mm coal by introducing vibration energy to dense medium gas-solid fluidized bed
Autorzy:
He, J.
Zhao, Y.
Luo, Z.
Zhao, J.
Duan, C.
He, Y.
Powiązania:
https://bibliotekanauki.pl/articles/110018.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
vibration energy
dense medium gas-solid fluidized bed
fluidization quality
density uniformity
separation efficiency
Opis:
Effects of the vibration energy on the fluidization quality and separation performance of dense medium gas-solid fluidized bed were investigated experimentally. The magnetite powder with a wide size range of 0.3-0.074 mm was utilized as the basic medium solids. 6-1 mm fine coal sample from Yongcheng (China) was used to perform the separation experiments. The results indicate that the vibration amplitude A and superficial gas velocity U are greatly significant to the fluidization stability and the density distribution uniformity. Comparing with the bed without vibration, the optimal SP and Sρ values of 0.034 kPa and 0.018 g/cm3 are acquired in vibration bed with the operating factors of A = 1 mm, U = 1.8Umf, f = 15 Hz and Hs = 150 mm. The coal ash content was reduced from 27.84% to 9.50% at a separating density of 1.68 g/cm3 with a probable error E value of 0.505. The separation efficiency of 6-1mm fine coal is effectively improved by introducing vibration energy to dense medium gas-solid fluidized bed. The technology provides a novel approach to achieve high-efficiency separation of 6-1 mm fine coal in the arid and water-shortage areas.
Źródło:
Physicochemical Problems of Mineral Processing; 2015, 51, 1; 95-108
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurements of Double Differential Cross-Sections for He at Intermediate Energy
Autorzy:
Ozer, Z.
Olgac, F.
Ulu, M.
Aktas, B.
Dogan, M.
Powiązania:
https://bibliotekanauki.pl/articles/1194824.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
34.80.Dp
Opis:
Detailed studies on ionization of atoms and molecules by electron impact have made numerous contributions to understanding of the structure of atoms and molecules including the interaction between particles. After a ionizing collision a scattered electron, an ejected electron and a recoil ion is formed. Doubly differential cross-sections give detailed information for one of the outgoing electrons. In this study, we report the angular distribution of double differential cross-sections of ejected electrons from He in intermediate energy region.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 341-342
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Global convergence analysis of impulsive fractional order difference systems
Autorzy:
He, D.
Xu, L.
Powiązania:
https://bibliotekanauki.pl/articles/200405.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
impulsive fractional difference systems
discrete Mittag-Leffler function
Z-transform
convergence
konwergencja
funkcja Mittag-Lefflera
transformacja Z
Opis:
This paper is designed to deal with the convergence and stability analysis of impulsive Caputo fractional order difference systems. Using the Lyapunov functions, the Z-transforms of Caputo difference operators, and the properties of discrete Mittag-Leffler functions, some effective criteria are derived to guarantee the global convergence and the exponential stability of the addressed systems.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 5; 599-604
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Koncepcja zapalnika uderzeniowego do amunicji odłamkowo-burzącej wystrzeliwanej ze 120 mm samobieżnego moździerza RAK
The Conception of the Impact Fuse for HE Ammunition Fired From the RAK 120 mm Self-Propelled Mortar
Autorzy:
Bazela, R
Kupidura, Z
Zielenkiewicz, M
Powiązania:
https://bibliotekanauki.pl/articles/403654.pdf
Data publikacji:
2013
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
mechanika
zapalnik
amunicja odłamkowo-burząca
moździerz
mechanics
fuse
HE ammunition
mortar
Opis:
Artykuł zawiera koncepcję nowego zapalnika uderzeniowego do pocisków odłamkowo-burzących wystrzeliwanych ze 120 mm samobieżnego moździerza RAK. Przedstawiono budowę i zasadę działania podstawowych zespołów zapalnika.
In the paper the conception of new impact fuse for HE projectiles fired from the RAK 120 mm self-propelled mortar was presented. The structure and the principles of operation of basic units of the fuse were also shown.
Źródło:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2013, 4, 4 (14); 85-91
2081-5891
Pojawia się w:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vacancy Cluster Distributions in He Implanted Silicon Studied by Slow Positron Annihilation Spectroscopy
Autorzy:
Brusa, R. S.
Powiązania:
https://bibliotekanauki.pl/articles/2007921.pdf
Data publikacji:
1999-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.60.+z
78.70.Bj
71.55.Cn
Opis:
Doppler broadening measurements performed by a slow positron beam on p-type Si samples implanted with He at 20 keV and at a fluence of 5×10$\text{}^{15}$ and 2×10$\text{}^{16}$ cm$\text{}^{-2}$ are reviewed and discussed. The evolution of the open volume defects distribution was studied as a function of isochronal and isothermal annealing of the samples. In the as implanted samples the majority of the open volume defects produced by implantation was passivated by He. The open volume defects density decreases, reaching a minimum at 250°C. In the 250-650°C temperature range there is an increase in defects due to the appearance of vacancy clusters. At the higher annealing temperatures (700-900°C) the vacancy clusters disappear only in the samples implanted at 5×10$\text{}^{15}$ cm$\text{}^{-2}$.
Źródło:
Acta Physica Polonica A; 1999, 95, 4; 474-478
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mannose inhibition of nitrate uptake by wheat roots
Autorzy:
Li, J.-Z.
Cram, W.J.
He, G.-Y.
Powiązania:
https://bibliotekanauki.pl/articles/58372.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
mannose
inhibition
nitrate uptake
wheat
Triticum aestivum
plant root
Opis:
The effect of mannose on nitrate uptake was investigated by a new non-invasive technique. Under normal condition, nitrate uptake by wheat (Triticum aestivum L.) roots was about 1-7 µmol gfwt-1 h-1. After the addition of 10 mM mannose, net nitrate influx by wheat roots started to decrease and reached a new steady state at -40 ±50% of the control value after 73 min. After mannose supplied for 2 h, its removal caused net nitrate influx to be recovered to an original rate. Therefore, the inhibition of mannose on nitrate uptake is not due to the onset of programmed cell death because it starts too rapidly and it is reversible, however, it is probably due to Pi and consequent ATP depletion.
Źródło:
Acta Societatis Botanicorum Poloniae; 2010, 79, 2; 107-110
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A known-plaintext attack on iterative random phase encoding in fractional Fourier domains
Autorzy:
Yin, F.
He, Q.
Liu, Z.
Powiązania:
https://bibliotekanauki.pl/articles/174043.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
image encryption
phase encoding
known-plaintext attack
Opis:
Known-plaintext attack is considered for decrypting the image generated by iterative random phase encoding in fractional Fourier transform domains. The double random phase encoding in Fourier domains is introduced to design the known-plaintext attack procedure. The decryption test is explored without both fractional order and these random phase masks. Some numerical simulations are made to demonstrate the validity of the known-plaintext attack.
Źródło:
Optica Applicata; 2017, 47, 1; 131-139
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
,,Czynił to bardziej z głupoty, niż z innego powodu. Biskup Stefan z Niborka (1412-1495)
"He did it more due to his stupidity rather than any other reason". Bishop Stephanus von Neidenburg (1412-1495)
Autorzy:
Ciołek, Renata
Powiązania:
https://bibliotekanauki.pl/articles/2117696.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
An excerpt from the Preussische Chronik (approx. 1526-1530) by Simon Grunau is the oldest known message on collecting numismatic items in Prussia in the 15th century. Judging by Grunau's words Stephanus von Neidenburg (approx. 1412-1495), Bishop of Kulm, owned a coin collection that was remarkably significant for its owner. Yet, more important is the fact that it renders a possibility to decide on the attitude of the people of the time towards an interest in old coins. Such a passion was totally beyond comprehension. The chronicle says he had a rich collection of old and rare numismatic items. Grunau's comment that the bishop was interested in old coins due to his senility and stupidity is very important. It points out that at that time collecting activities in Poland were only in their infancy so even S. Grunau, a well–educated person, did not understand the bishop's passion for 'old and foreign' coins. Grunau mentioned the character of the collection: it contained coins of all countries. Thus perhaps the bishop's collecting passion was meant to accomplish a definite goal, perhaps just in part it was deliberate and pre-planned, not unintentional. However, it is probable that the collection comprised coins contemporary to the bishop. At that time all over Prussia issues from many countries occurred together with Teutonic coins. The bishop might have collected more interesting specimens which were then in 'circulation'. Moreover one cannot exclude that he also possessed ancient and medieval coins found in Prussia. Occurrence of Roman issues in medieval hoards was remarkably frequent. Thus one might suppose that even a single assemblage of this type being in Neidenburg's possession might have implied that he had coins from 'all countries'. The subjectivity of Simon Grunau's comments is worth emphasizing. Von Neidenburg's dances with young girls alongside his numismatic interests provided arguments against him. One might suppose that Grunau coloured at least part of information on the bishop. However, it would be difficult to presume that information on von Neidenburg's coin collection was a mere product of imagination. At that time coin collecting was such a rare phenomenon that Grunau could not have confabulated it. .
Źródło:
Wiadomości Numizmatyczne; 2005, 49, 1(179); 91-95
0043-5155
Pojawia się w:
Wiadomości Numizmatyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature Studies of Optical Birefringence in Molecular Liquids. I. Liquids with Linear Temperature Dependence
Autorzy:
Błaszczak, Z.
Doiari, A.
Powiązania:
https://bibliotekanauki.pl/articles/1920618.pdf
Data publikacji:
1992-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
35.20.My
42.60.He
78.20.Dj
Opis:
We report the first systematic study of the temperature dependence of optically induced birefringence in benzene, toluene, nitrobenzene, chlorobenzene, 2-bromoanisole, 2-methylbenzaldehyde, 3-methylbenzaldehyde, 3-chlorobenzaldehyde and cinnamaldehyde. The optical Kerr constants, relative to benzene, are measured in a broad temperature range. Refractive indices and densities of the liquids for the temperatures studied were also determined. For the above liquids the T$\text{}^{-1}$ temperature dependences of the optical Kerr constants have been found. From our measurements, the molar Kerr constants and the effective molecular anisotropies were calculated as functions of temperature. The mean values of the second-order optical hyperpolarizability have also been determined.
Źródło:
Acta Physica Polonica A; 1992, 81, 4-5; 475-484
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanisms for the improved flotation of inherently hydrophobic graphite in electrolyte solution
Autorzy:
Lai, Q.
Liao, Y.
Liu, Z.
He, Y.
Zhao, Y.
Powiązania:
https://bibliotekanauki.pl/articles/110761.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
flotation
graphite
low-grade
electrolyte
Opis:
It is well documented that unavoidable ions in a pulp such as Mg2+, Ca2+, and K+ have a significant effect on the interaction for particles, especially for flotation of metallic sulfide minerals and clay minerals. In this study, the effect of electrolytes on the flotation of inherently hydrophobic mineral-graphite was studied. It was found that the zeta potential showed a dramatic decrease, and the reagent adsorption capacity of mineral enhanced in the present of electrolytes. The possible mechanism responsible for improved recovery was investigated by electrokinetic, surface tension and ions adsorption tests. It is likely that the hydrophobic force is stronger than the electrostatic force due to the reduced potential of graphite. This might be in favor of the formation of hydrophobic oil film leading to an increase in the graphite floatability. The experiments provided a new spectacle to study inherently hydrophobic mineral processing with electrolyte solution.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 3; 944-954
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strong Laser Field Induced Modifications of Electron-Transfer Processes in Ne⁺-He Collisions
Autorzy:
Lu, Z.
Sun, Y.
Ma, L.
Liu, J.
Powiązania:
https://bibliotekanauki.pl/articles/1032308.pdf
Data publikacji:
2017-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.70.Jz
34.50.-s
Opis:
A strong laser field ( ≈ 10¹⁵ W/cm²) induced low-collisional-energy charge transfer process in Ne⁺-He system is explored. In the low collisional energy regime, the cross-section can be ≈ 10¯¹⁷ cm² which is about two orders of magnitude higher than the collision-only process. With increasing collisional energy the cross-section curve displays flattens and the charge capture tends to be practically independent of the laser detuning. In addition, we find that the capture probability in this Ne⁺-He system varies significantly with the laser polarization angle.
Źródło:
Acta Physica Polonica A; 2017, 131, 6; 1519-1524
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Underwater Explosion Performance of RDX/AP-based Aluminized Explosives
Autorzy:
Xiang, D.
Rong, J.
He, X.
Feng, Z.
Powiązania:
https://bibliotekanauki.pl/articles/358616.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
UNDEX
RDX/AP-based aluminized explosives
detonation
shock wave
Al/O ratio
Opis:
To understand the underwater explosion (UNDEX) performance of RDX/AP-based aluminized explosives, six formulations of the explosives were prepared, with Al content varying from 30% to 55% and ammonium perchlorate (AP) content from 45% to 20%. A series of UNDEX tests that used a 1 kg cylindrical charge was conducted underwater at a depth of 4.7 m. The pressure histories of the shock wave produced at different positions and the bubble periods were measured. The coefficients of the similarity law equation for the shock wave parameters were fitted with experimental data. The effect of the aluminum/oxygen (Al/O) ratio on the performance of the energy output structure for RDX/AP-based aluminized explosives is discussed. The bubble motion during UNDEX was simulated using MSC.DYTRAN software, and the radius-time curves of the bubbles were determined. The results show that AP influences the detonation reaction mechanism of RDX/AP-based aluminized explosives, which causes different UNDEX performances. The bubble energy of the RDX/AP-based aluminized explosive was higher than that of RDX-based and HMX-based aluminized explosives.
Źródło:
Central European Journal of Energetic Materials; 2017, 14, 1; 60-76
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Resonance Imaging at Low Magnetic Field Using Hyperpolarized $\text{}^{3}$He Gas
Autorzy:
Suchanek, M.
Cieślar, K.
Pałasz, T.
Suchanek, K.
Dohnalik, T.
Olejniczak, Z.
Powiązania:
https://bibliotekanauki.pl/articles/2042109.pdf
Data publikacji:
2005-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.80.Bx
67.65.+z
75.50.-y
87.61.-c
Opis:
A low magnetic field magnetic resonance imaging system for small animal lung imaging using hyperpolarized $\text{}^{3}$He gas is presented. The hyperpolarized $\text{}^{3}$He gas at 1 mbar pressure and 30% polarization is obtained by the metastability exchange optical pumping technique. The magnetic resonance imaging unit is based on a permanent magnet of open geometry, built from a new generation Nd-B-Fe magnetic material. It produces the magnetic field of 88 mT with homogeneity better than 50 ppm in the 10 cm diameter sphere, after application of passive shimming. The magnetic field gradients of 30 mT/m are generated by a set of biplanar, actively shielded gradient coils. The first $\text{}^{1}$H images of various biological objects, as well as $\text{}^{3}$He images of the rat lung in vivo obtained in the described system are shown. In terms of sensitivity and resolution, the technique is superior to conventional $\text{}^{1}$H magnetic resonance imaging, and offers great possibilities in early diagnosis of lung diseases.
Źródło:
Acta Physica Polonica A; 2005, 107, 3; 491-506
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ab Initio Study of He Migrations in Fcc Au-Ag Alloys
Autorzy:
Zhu, Z.
Zhang, Y.
Xie, J.
Yang, L.
Nie, J.
Zu, X.
Powiązania:
https://bibliotekanauki.pl/articles/1398923.pdf
Data publikacji:
2016-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
66.30.J-
81.05.Bx
71.15.Mb
Opis:
Ab initio calculations based on the density functional theory have been performed to investigate the migrations of interstitial helium (He) atoms in Au-Ag alloys with two different mass ratios (Au₃Ag₂ and AuAg). The results show that the migration mechanisms of He atoms mainly depend on the crystal structures of alloys, and their migration energy barriers are affected by the migration paths in Au-Ag alloys. He interstitials preferentially occupied the most stable sites, but it is difficult for He interstitials to migrate to nearest most stable sites via second stable positions at room temperature. When He atom is at the tetrahedral position which has higher formation energy, it possibly migrates to nearest tetrahedral positions directly for AuAg alloy. In addition, comparing the migration of He defects in the two alloys, we found that the properties of migration energy and relative stability of He atoms probably slightly depend on the mass-density of Au-Ag alloys.
Źródło:
Acta Physica Polonica A; 2016, 129, 6; 1151-1154
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two-stage classification approach for human detection in camera video in bulk ports
Autorzy:
Mi, C.
Zhang, Z.
He, X.
Huang, Y.
Mi, W.
Powiązania:
https://bibliotekanauki.pl/articles/259499.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Human Detection
Histograms of Oriented Gradients
Support Vector Machine
classification
Opis:
With the development of automation in ports, the video surveillance systems with automated human detection begun to be applied in open-air handling operation areas for safety and security. The accuracy of traditional human detection based on the video camera is not high enough to meet the requirements of operation surveillance. One of the key reasons is that Histograms of Oriented Gradients (HOG) features of the human body will show great different between front & back standing (F&B) and side standing (Side) human body. Therefore, the final training for classifier will only gain a few useful specific features which have contribution to classification and are insufficient to support effective classification, while using the HOG features directly extracted by the samples from different human postures. This paper proposes a two-stage classification method to improve the accuracy of human detection. In the first stage, during preprocessing classification, images is mainly divided into possible F&B human body and not F&B human body, and then they were put into the second-stage classification among side human and non-human recognition. The experimental results in Tianjin port show that the two-stage classifier can improve the classification accuracy of human detection obviously.
Źródło:
Polish Maritime Research; 2015, S 1; 163-170
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oscillator Strengths of the 1s2s$\text{}^{1}$S$\text{}^{e}$ → 1s2p$\text{}^{1}$P$\text{}^{0}$ Transition in He
Autorzy:
Tiwary, S. N.
Kumar, P.
Powiązania:
https://bibliotekanauki.pl/articles/1887915.pdf
Data publikacji:
1991-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
31.10.+z
Opis:
The paper presents configuration interaction (CI) calculations of both the length and velocity forms of the oscillator strengths for 1s2s$\text{}^{1}$S$\text{}^{e}$ → 1s2p$\text{}^{1}$P$\text{}^{0}$ transition in the He atom. For the first time the agreement between the length and velocity values to within about 0.045% has been achieved.
Źródło:
Acta Physica Polonica A; 1991, 80, 1; 23-28
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic calibration system for digital-display vibrometers based on machine vision
Autorzy:
He, W.
Xu, G.
Rong, Z.
Li, G.
Liu, M.
Powiązania:
https://bibliotekanauki.pl/articles/221163.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
image recognition
calibration
vibration measurement
machine vision
automatic testing
digital-display vibrometer
Opis:
Considering the low efficiency during the process of traditional calibration for digital-display vibrometers, an automatic calibration system for vibrometers based on machine vision is developed. First, an automatic vibration control system is established on the basis of a personal computer, and the output of a vibration exciter on which a digital-display vibrometer to be calibrated is installed, is automatically adjusted to vibrate at a preset vibration level and a preset frequency. Then the display of the vibrometer is captured by a digital camera and identified by means of image recognition. According to the vibration level of the exciter measured by a laser interferometer and the recognized display of the vibrometer, the properties of the vibrometer are calculated and output by the computer. Image recognition algorithms for the display of the vibrometer with a high recognition rate are presented, and the recognition for vibrating digits and alternating digits is especially analyzed in detail. Experimental results on the built-up system show that the prposed image recognition methods are very effective and the system could liberate operators from boring and intense calibration work for digital-display vibrometers.
Źródło:
Metrology and Measurement Systems; 2014, 21, 2; 317-328
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flotation separation of wolframite from quartz using N-oleoyl sarcosine acid as collector
Autorzy:
Xian-Ping, L.
Feng, B.
Xianwen, Z.
Li-Yying, L.
Zheng-He, X.
Powiązania:
https://bibliotekanauki.pl/articles/109444.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
flotation
N-oleoyl sarcosine acid
wolframite
quartz
Opis:
In this study the collecting power of N-oleoyl sarcosine acid towards wolframite and quartz was studied using flotation. The adsorption mechanism was also discussed based on the results from adsorption experiments, zeta potential measurements and infrared spectroscopy study. The flotation results showed that N-oleoyl sarcosine acid showed a good collecting power towards wolframite, and the optimal flotation pH = 7 was obtained. However, the collecting power of N-oleoyl sarcosine acid towards quartz was weak. Therefore, the flotation separation of wolframite from quartz can be performed using N-oleoyl sarcosine acid as a collector. The adsorption tests and electrokinetic studies showed that N-oleoyl sarcosine acid adsorbed only on the wolframite surface. Additionally, the results from the infrared spectroscopy study confirmed that N-oleoyl sarcosine acid is adsorbed on the wolframite surface, and the metal complex (ferriccarboxylate) maybe the major adsorbed species.
Źródło:
Physicochemical Problems of Mineral Processing; 2017, 53, 1; 34-41
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of polyacrylic acid on the surface properties of calcite and fluorite aiming at their selective flotation
Autorzy:
Zhang, C.
Gao, Z.
Hu, Y.
Sun, W.
Tang, H.
Yin, Z.
He, J.
Guan, Q.
Zhu, Y.
Powiązania:
https://bibliotekanauki.pl/articles/110577.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
calcite
fluorite
selective flotation
polyacrylic acid
Opis:
In this study, the polyacrylic acid (PAA) was studied as a selective depressant for calcite in the selective flotation of fluorite and calcite, and the implications of this process for the separation of fluorite ore were studied using micro-flotation tests, and the results were analyzed with Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) analyses. The flotation tests indicated that the preferential adsorption of PAA onto calcite rather than sodium oleate (NaOl) could selectively depress the flotation of calcite, allowing its separation from fluorite at pH 7. The zeta potential of calcite became more negative with the addition of PAA rather than with NaOl. However, the characteristic features of PAA adsorption were not observed for fluorite, suggesting that NaOl preferentially adsorbed on the surface of fluorite, or that PAA could be replaced by NaOl on the fluorite surface. FT-IR and XPS analysis were utilized to obtain a better understanding of the mechanism by which PAA was more strongly adsorbed on the calcite surface than NaOl. This was revealed to occur through chemical bonding between the carboxyl group of PAA and the hydroxyl groups of the Ca species on the calcite surface, modifying the structure of the adsorbed layer. A possible adsorption mechanism, along with a postulated adsorption mode for the surface interaction between PAA and calcite, is proposed.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 3; 868-877
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy-aware key management in mobile wireless sensor networks
Autorzy:
He, X.
Szalachowski, P.
Kotulski, Z.
Fotiou, N.
Marias, G. F.
Polyzos, G. C.
Meer de, H.
Powiązania:
https://bibliotekanauki.pl/articles/106190.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
wireless sensor networks
Diffie-Hellman key agreement
key management
Opis:
Wireless sensor networks have received wide attention recently across the indoor and outdoor applications. On the other hand, more and more application scenarios require sensor nodes to be mobile, which imposes new technological challenges for security. Key management is the core for secure data communications among the resource-constrained sensor nodes. In this paper, based on the Group Diffie-Hellman key agreement protocols and the energy level of each node in the network, we propose Energy Aware Group Diffie-Hellman key management protocol for mobile wireless sensor networks. The simulation results show that the proposed key management protocol provide significant improvement in maximizing the lifetime of networks.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2012, 12, 4; 83-96
1732-1360
2083-3628
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Controlled Synthesis and Application of Nano-energetic Materials Based on the Copper Oxide/Al System
Autorzy:
He, S.
Chen, J.
Yang, G.
Qiao, Z.
Li, J.
Powiązania:
https://bibliotekanauki.pl/articles/358254.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
nanoenergetic material
CuO/Al
laser ignition
plate-like
hollow sphere
Opis:
Nanothermite composites containing metal oxide and metal fuel are attracting attention due to their outstanding combustion characteristics. The morphology of metal oxide is important for the performance of nanothermite composites. In this paper, branch-, plate-, sphere-, and hollow sphere-like CuO nano/microstructures were synthesized via a facile hydrothermal process. The CuO/Al based nanothermites were prepared via ultrasonic mixing of the asobtained CuO products and nano-Al. The combustion behaviour of CuO/Al based nanothermites was analyzed by DSC and laser ignition. This study shows that this nanoscale mixing resulted in a large interfacial contact area and low diffusional resistance between the fuel and the oxidizer, and the reaction reflects large energy and laser ignition sensitivity.
Źródło:
Central European Journal of Energetic Materials; 2015, 12, 1; 129-144
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Study of the Effect of Furrows on Biosonar Beamforming in Aselliscus Stoliczkanus Bat
Autorzy:
He, W.
Feng, J.
Gao, L.
Zhang, Z.
Lu, H.
Powiązania:
https://bibliotekanauki.pl/articles/176802.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Aselliscus Stoliczkanus bat
furrows
frequency-selective characteristics
finite element method
beam pattern
Opis:
The Aselliscus Stoliczkanus bat, studied here, has intricately shaped structures surrounding the nostrils. These structures are hypothesised to have influence on animals’ acoustic radiation patterns. Using micro-tomography scanning technique, a 3D digital model of the noseleaf is reconstructed and biosonar beam pattern is analysed using a finite element method based on the 3D noseleaf model. The present research focuses on the conspicuous furrows in noseleaf, and our analysis allows to conclude the followings: a) structural details in noseleaf of Aselliscus Stoliczkanus bat can produce acoustic effects even if it is not adjacent to the nostrils, b) the furrows possess frequency-selective characteristics, c) the furrows have the function to manipulate the direction and width of the outgoing ultrasound wave.
Źródło:
Archives of Acoustics; 2017, 42, 3; 395-399
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie metody GC/TCD oznaczania He, Ne i Ar w wodach podziemnych do oceny ich wieku, na przykładzie wód z rejonu Buska-Zdroju
Application of GC/TCD method of He, Ne and Ar analysis in groundwater dating, using groundwater from Busko-Zdrój region as an example
Autorzy:
Najman, J.
Kotowski, T.
Kasela, T.
Bielewski, J.
Śliwka, I.
Powiązania:
https://bibliotekanauki.pl/articles/2075590.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
chromatografia gazowa
gazy szlachetne
datowanie wód podziemnych
gas chromatography
noble gases
groundwater dating
Opis:
The paper presents the method of chromatographic determination of noble gases concentrations (He, Ne and Ar) in groundwater. He concentration in groundwater is helpful in groundwater dating over a wide range of time. Ne and Ar concentrations are used to calculate excess air and recharge temperature of groundwater. Sulphide waters occurring in Cenomanian sediments in the southern part of the Miechów Trough in Busko-Zdrój, Krzyż and Kazimierza Wielka areas are the subject of research. The results of the noble gases concentrations measurements for boreholes: Busko C-1, Cudzynowice GT-1 and Wełecz S-6 are presented as well as the methodology of calculating concentrations of these gases and groundwater ages.
Źródło:
Przegląd Geologiczny; 2017, 65, 11/1; 1130--1133
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
„Mój przyjaciel z Haify powiedział, że gdy śni, nie śni o wrogu, lecz o sobie samym”. Studia nad konfliktem palestyńsko‑izraelskim jako wyzwanie dla studiów nad Zagładą
“My friend from Haifa said that when he dreamed, he dreamed not about the enemy, but about himself”. Studies on the Palestinian-Israeli Conflict as a Challenge for the Holocaust Studies
Autorzy:
Tomczok, Marta
Powiązania:
https://bibliotekanauki.pl/articles/699446.pdf
Data publikacji:
2018
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Tematy:
kruchość
żydowskość
syjonizm
Darwish
Godard
vulnerability
Jewishness
Zionism
Opis:
In the article, the author endeavours to describe the advantages of juxtaposing studies on the Palestinian-Israeli conflict with the Holocaust studies. Arguments for it are found in works in sociology and philosophy of prejudice and ethnic conflicts (Monika Bobako), reflections on memory and decolonisation (Michael Rothberg), and – especially – those on dual nationality as a philosophical issue (Judith Butler). However, the author primarily focuses on further developing Butler’s intriguing theory of vulnerability and applying it to fragility as a political, architectural, and existential problem. In order to do so, the author discusses the poetry of Mahmud Darwish (hardly present in Poland) and the film Notre musique by Jean-Luc Godard.
W artykule autorka próbuje opisać zalety wynikające z zestawienia studiów nad konfliktem palestyńsko-izraelskim z badaniami Zagłady. Argumentów dostarczają jej prace z zakresu socjologii i filozofii uprzedzeń oraz konfliktów etnicznych (Monika Bobako), refleksji nad pamięcią i dekolonizacją (Michael Rothberg), a szczególnie – nad dwunarodowością jako problemem filozoficznym (Judith Butler). Badaczka stara się jednak przede wszystkim rozwinąć ciekawą teorię wulnerabilności J. Butler i odnieść ją do kruchości jako problemu politycznego, architektonicznego i egzystencjalnego. W tym celu omawia słabo obecną w Polsce poezję Mahmuda Darwisha oraz film Nasza muzyka Jeana-Luca Godarda.
Źródło:
Narracje o Zagładzie; 2018, 4; 67-80
2450-4424
Pojawia się w:
Narracje o Zagładzie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Style kierowania menedżerów na przykładzie firmy pożyczkowej Partner Pożyczki Sp. z o.o.
He styles of management based on the example of Partner Pożyczki Sp. z o.o. credit company
Autorzy:
Olechnowicz-Czubińska, M.
Powiązania:
https://bibliotekanauki.pl/articles/203266.pdf
Data publikacji:
2014
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
osobowościowe style kierowania
sytuacyjne style kierowania
osobowościowo-sytuacyjne style kierowania
inteligencja emocjonalna
Opis:
Skuteczne kierowanie pracownikami w firmie stanowi coraz większe wyzwanie dla menedżerów. Duże znaczenie mają stosowane przez nich style kierowania. W artykule przedstawiono analizę dorobku literaturowego dotyczącego tego zagadnienia. Wyróżniono i omówiono osobowościowe, sytuacyjne oraz osobowościowo-sytuacyjne style kierowania. Zidentyfikowano style kierowania osób zatrudnionych na stanowiskach menedżerskich w firmie Partner Pożyczki Sp. z o.o.
Effective management of the employees in a company is quite a challenge for managers. The styles of their managing are of great importance. The article presents an analysis the literary works on the issue. It features and describes individualistic, situational and a mixture of both styles of management. The article also identifies the management styles of the executives in Partner Pożyczki Sp. z o.o. company.
Źródło:
Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie; 2014, 62; 115-125
0239-9415
Pojawia się w:
Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Depth Profiling of Defects in He Implanted $SiO_2$
Autorzy:
Mariazzi, S.
Toniutti, L.
Brusa, R.
Duarte Naia, M.
Karbowski, A.
Karwasz, G.
Powiązania:
https://bibliotekanauki.pl/articles/1812538.pdf
Data publikacji:
2008-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.60.+z
78.70.Bj
68.55.-a
61.82.Ms
61.72.J-
Opis:
Thin layer of $SiO_2$ thermally grown on p-type Si was implanted with $He^+$ ions at 30 keV with a dose of $5×10^{15}$ ions/$cm^2$. $SiO_2//Si$ samples were depth profiled by Doppler broadening positron annihilation spectroscopy to identify induced defects in the silicon oxide, at the interface and in the Si substrate. In one sample the silicon dioxide layer was removed by etching after implantation. It is shown that removing the silicon dioxide layer some more information about defects into the substrate can be found.
Źródło:
Acta Physica Polonica A; 2008, 113, 5; 1447-1453
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 97

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