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-Verlag Berlin Heidelberg 2012 Abstract: A new approach for peak-to-average power ratio (PAPR) reduction in orthogonal frequency division multiplexing (OFDM) systems was proposed. This approach is based... in the literature while at the same time improves the PAPR reduction performance by about 0.3 dB. Key words: orthogonal frequency division multiplexing (OFDM); peak-to-average power ratio (PAPR); computational......
of the double-parameter reduction method is the matching reduction principle of the slope with different angles. This principle is represented by the ratio of the reduction parameter of the cohesion...A strength reduction method based on double reduction parameters and its applicationYUAN Wei(袁维), BAI Bing(白冰), LI Xiao-chun(李小春), WANG Hai-bin(汪海滨) (State Key Laboratory of Geomechanics......
J. Cent. South Univ. (2017) 24: 203-216 DOI: 10.1007/s11771-017-3421-0 Vertical-to-horizontal response spectral ratio for offshore ground motions: Analysis and simplified design equation CHEN Bao... in vertical component between onshore and offshore motions, the vertical-to-horizontal peak ground acceleration ratio (V/H PGA ratio) and vertical-to-horizontal response spectral ratio (V/H) were......
are 99.6%, 99.8%, 97.0% and 97.3%, respectively. Key words: bismuth oxide residue; reduction smelting; FeO-SiO2-CaO ternary slag system; recovery ratio 1 Introduction Bismuth is a kind of green metals... Results and discussion 3.1 Effect of coal powder amount on reduction smelting The effects of reductive coal powder amount on metal recovery ratio were investigated by reduction smelting at 1200 °C for 40......
J. Cent. South Univ. (2021) 28: 1534-1545 DOI: https://doi.org/10.1007/s11771-021-4713-y Improved designed method of pervious concrete based on optimal volume ratio of paste to aggregate BA Ming... concrete. The improved design method is mainly based on the optimal volume ratio of paste to aggregate (VRPA), which was determined by testing the average thickness of cement paste coating aggregate......
Warm hydroforming of magnesium alloy tube with large expansion ratio LIU Gang(刘 钢), TANG Ze-jun(汤泽军), HE Zhu-bin(何祝斌), YUAN Shi-jian(苑世剑) School of Materials Science and Engineering, Harbin... alloy tubular part with a large expansion ratio. Effects of temperature on the mechanical properties and formability were studied by uniaxial tensile test and hydraulic bulge test. Total elongation......
and carbothermal reduction methods. Compared with fusion method,carbothermal reduction method owns lots of merits such as more simple process, lower price equipments, higher energy usage ratio, and lower... (mass ratio of reacted Al2O3 to total Al2O3) and the yield of SiC (mass ratio of Si ion in SiC to Si ion in total SiO2) are the important indexes of carbothermal reduction process of tailings......
: Isothermal experiments on the reduction of Fe2O3-Cr2O3-NiO (molar ratio of Fe-to-Cr-to-Ni is 3:2:2) by graphite were carried out at 1350–1550°C, and effects of various factors on reduction degree were... that the fast reduction of carbon-bearing chromite pellet can be achieved above 1300 °C, the reduction reaction of iron is easier than that of chromium and the mole ratio of C-to-O=1.2 is better......
Mineral sulphide-lime reactions and effect of CaO/C mole ratio during carbothermic reduction of complex mineral sulphidesYotamu Stephen Rainford HaraInstitute for Materials Research(IMR),School...) and the effect of CaO/C mole ratio during carbothermic reduction(MS+CaO+C=M+CaS+CO(g)) were investigated for complex froth flotation mineral sulphide concentrates.Phases in the partially and fully reacted......
A reduction approach to prepare ZnSe nanocrystallites JIANG Hai-qing(姜海青)1, 2, CHE Jun(车 俊)2, LI Zhi-min(李智敏)1, YAO Xi(姚 熹)2 1. School of Technical Physics, Xidian University, Xi’an 710071, China... nanocrystallites powders were successfully prepared by reduction method with H2SeO4 or H2SeO3 as selenium source and Zn(Ac)2·H2O as zinc source. The reaction mechanism was also discussed through XRD......