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Wyszukujesz frazę "Feng, A." wg kryterium: Wszystkie pola


Tytuł:
Investigation and optimization of use of anionic collectors in direct flotation of bauxite ores
Autorzy:
Liu, C.
Feng, A.
Guo, Z.
Powiązania:
https://bibliotekanauki.pl/articles/110801.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
bauxite
collector
direct flotation
Opis:
Bauxite is the main raw material for the alumina industry. Direct flotation is the most widely used method for bauxite beneficiation. In this study, a large number of direct flotation tests were carried out using several anionic reagents. The testing concluded that vegetable oil acid (VOA), naphthenic acid (NA) and lauryl polyoxyethylene phosphate (AEP12) were the three outstanding collectors for bauxite direct flotation. ZMC collector was mixed and prepared using VOA, NA and AEP12, in which the mass ratio of VOA, NA and AEP12 was 1:1:0.5. When processing the bauxite ores of the mass ratio of Al2O3 to SiO2 (A/S) = 4.99, the A/S of the final concentrate was 7.08 and the recovery of Al2O3 was 90.22%. When processing ores of A/S = 4.5, the A/S of the final concentrate was 7.04 and the recovery of Al2O3 was 92.16%. Thus, it can be seen that properties and behaviors of the ZMC reagent were remarkable and met the demands of the “Lime-Bayer Process”.
Źródło:
Physicochemical Problems of Mineral Processing; 2016, 52, 2; 932-942
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
How Clean is Clean Enough? Maintaining Thermal Protective Clothing Under Field Conditions in the Oil and Gas Sector
Autorzy:
Crown, E. M.
Feng, A.
Xu, X.
Powiązania:
https://bibliotekanauki.pl/articles/90475.pdf
Data publikacji:
2004
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
protective clothing
decontamination
flammability
przemysł wydobywczy
gaz kopalniany
odzież ochronna
izolacja cieplna
tkaniny na odzież ochronną
Opis:
The purpose of this research was to develop practical care procedures to help maintain the protective quality of flame resistant workwear laundered by workers in the field. Based on observed field conditions, experiments were conducted that simulated domestic laundry procedures. The first experiment involved two flame resistant (FR) fabrics, contaminated or not contaminated with oil. Independent variables also included detergent type and laundry pre-treatment. Other laundry parameters were controlled. Results indicated that it is easier to maintain the FR performance of the FR-treated blend than it is for the aramid fabric. It is hypothesized that energy generated by initial ignition of oil on the specimens triggers the FR mechanism of the treatment, which in turn inhibits further combustion. A second experiment using larger specimens and a domestic washing machine also supported the hypothesized mechanism.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2004, 10, 3; 247-254
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comment on “An enigmatic, possibly chemosymbiotic, hexactinellid sponge from the early Cambrian of South China” by Joseph P. Botting, Lucy A. Muir, Xiang-Feng Li, and Jin-Pai Lin
Autorzy:
Zhuravlev, A.Y.
Vintaned, J.A.G.
Tabachnick, K.R.
Powiązania:
https://bibliotekanauki.pl/articles/945820.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Źródło:
Acta Palaeontologica Polonica; 2014, 59, 2; 475-476
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of sodium hexametaphosphate in flotation of a nickel ore
Autorzy:
Feng, B.
Wang, P.
Lu, Y.
Feng, Q.
Powiązania:
https://bibliotekanauki.pl/articles/109887.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
nickel ore
lizardite
flotation
concentration process
pentlandite
Opis:
In this work, a role of sodium hexametaphosphate (SHMP) in the flotation performance of a nickel ore was studied and mechanism was discussed in detail. The results showed that the presence of lizardite interferes with the flotation performance of pentlandite. The adsorption of SHMP at the lizardite/solution interface and the removal of magnesium ions from lizardite surface overcompensated the positive charge on the lizardite particle, and made its zeta potential negative. The interaction between lizardite and pentlandite changed from attractive to repulsive in the presence of SHMP. Thus, the addition of SHMP made the mixed sample of pentlandite and lizardite more dispersed, and significantly reduced the adverse effect of lizardite on the flotation of pentlandite. However, when the content of lizardite in the mixed ore was increased, the effect of SHMP weakened. Therefore, in flotation of a nickel ore containing a large amount of lizardite (46% w/w), SHMP usage is not suitable at the roughing stage due to the fact that lizardite in the pulp will consume most of the SHMP, and hence the removal of lizardite slimes from pentlandite surface become impossible. Based upon the results, SHMP usage is found to be suitable at the cleaning stage to improve the grade of concentrate.
Źródło:
Physicochemical Problems of Mineral Processing; 2016, 52, 1; 170-181
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of a novel transcript variant of human STAU1 gene
Autorzy:
Fa-hui, Nie
Hai-feng, Yao
Rui-feng, Qi
Xin, Li
Cai-bin, Wu
Powiązania:
https://bibliotekanauki.pl/articles/1040700.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
expression pattern
STAU1
Opis:
Human STAU1 is one member of the family of double-stranded RNA (dsRNA)-binding proteins. It is thought to function in transporting mRNA, controlling translation and eliciting mRNA decay in neurons, and to function in infection of influenza virus and human immunodeficiency virus type 1 (HIV-1). Four transcripts coding two isoforms have been identified before. In this study, we have isolated a novel transcript of STAU1, coding a novel isoform that has six amino acids more (SFPLKQ) than isoform a. In order to examine the tissue distribution of this novel isoform, we have performed RT-PCR experiments and the analysis showed that it was highly expressed in heart, liver, kidney and pancreas.
Źródło:
Acta Biochimica Polonica; 2008, 55, 3; 473-478
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Endogenous timing in a vertically differentiated mixed duopoly with Cournot competition
Autorzy:
Feng, L.
Gu, M.
Powiązania:
https://bibliotekanauki.pl/articles/229227.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
vertical differentiation
endogenous timing
public firm
private firms
Opis:
This paper compares the equilibrium outcomes under simultaneous and sequential output setting in a mixed duopoly in a vertically differentiated market. When the timing of the output game is determined endogenously, it is shown that simultaneous play in the quality stage with the public firm acting as the high-quality producer and simultaneous play in the second period in the output stage turn out to be the unique subgame perfect Nash equilibrium, which contrasts with the endogenous timing in a purely private duopoly.
Źródło:
Archives of Control Sciences; 2016, 26, 2; 161-175
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A stereological ubiquitiformal softening model for concrete
Autorzy:
Ou, Zhuo-Cheng
Li, Guan-Ying
Duan, Zhuo-Ping
Huang, Feng-Lei
Powiązania:
https://bibliotekanauki.pl/articles/281602.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
ubiquitiform
fractal
concrete
softening curve
Opis:
A stereological ubiquitiformal softening model for describing the softening behavior of concrete under quasi-static uniaxial tensile loadings is presented in this paper. In the model, both the damage evaluation process of fracture cross-sections and their distribution along the specimens axis are taken into account. The numerical results of a certain kind of full grade concrete made of crushed coarse aggregate are found to be in good agreement with the experimental data. Moreover, an experiental relation between the lower bound to the scale invariance of concrete and its tensile strength is also obtained by data fitting of the experimental data, which provides an effective approach to determine the lower bound to scale invariance of concrete.
Źródło:
Journal of Theoretical and Applied Mechanics; 2019, 57, 1; 27-35
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On global solutions to a nonlinear Alfvén wave equation
Autorzy:
Feng, XS.
Wei, F.
Powiązania:
https://bibliotekanauki.pl/articles/1311427.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
nonlinear Alfvén wave
existence and uniqueness of global solution
spatial asymptotic behavior
Opis:
We establish the global existence and uniqueness of smooth solutions to a nonlinear Alfvén wave equation arising in a finite-beta plasma. In addition, the spatial asymptotic behavior of the solution is discussed.
Źródło:
Annales Polonici Mathematici; 1995, 62, 2; 155-172
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties of New York/New Jersey Harbor Sediments
Autorzy:
Jones, K. W.
Feng, H.
Stern, E. A.
Neuhäusler, U.
Osán, J.
Marinkovic, N.
Song, Z.
Powiązania:
https://bibliotekanauki.pl/articles/2044657.pdf
Data publikacji:
2006-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
89.60.-k
89.20.-a
Opis:
Sediments found in waterways around the world may contain toxic compounds of anthropogenic origin that can harm the environment and human health. As a result, it is often necessary to remove them and find disposal methods that are environmentally and economically acceptable. Here, we report on results obtained in an experimental program to characterize the nature of the sediment contamination. The objective was to gain a better understanding of the properties of the sediments to develop better methods for understanding the fate and transport of the contaminants and for improving methods for their removal from the sediments. Our investigations made use of X-ray facilities at the Brookhaven National Synchrotron Light Source and the European Synchrotron Radiation Facility at Grenoble, France. The experiments included: measurements of the microstructure of the sediments using computed microtomography, X-ray absorption, and fluorescence microscopy with resolutions as low as 0.2 micrometers to obtain information on the relationships of organic and mineral components of the sediments and on the distribution of contaminants on the surfaces of the sediment grains, investigation of functional groups of chemical compounds using X-ray absorption near-edge spectroscopy and Fourier transform infrared spectroscopy. Scanning electron microscopy and electron probe measurements were made to ascertain the morphology of the sediment surfaces and the distribution of metals on individual sediment grains.
Źródło:
Acta Physica Polonica A; 2006, 109, 3; 279-286
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulation of spontaneously condensing flows in a plane turbine cascade
Autorzy:
Li, L.
Li, G.
Feng, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1986685.pdf
Data publikacji:
2002
Wydawca:
Politechnika Gdańska
Tematy:
wet steam
condensing flow
Eulerian/Eulerian model
numerical simulation
Opis:
The low efficiency of wet steam turbine is mainly attributed to wetness losses. To investigate the mechanisms which give rise to these losses, a fully Eulerian model has been developed for calculation of the wet steam flows with spontaneous condensation. In this model, the liquid phase is described with two conservation equations in Eulerian form and coupled with a solver of gas dynamics equations. With such a model, the existing code for simulation of single-phase flows can easily be changed to include wet steam two-phase flows in wet steam turbines. A numerical simulation of condensing flow in a plane turbine cascade is performed, and the numerical results are presented and compared with the experimental results.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2002, 6, 1; 209-216
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł

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