共搜索到24422条信息,每页显示10条信息,共2443页。用时:0小时0分0秒312毫秒
三级钢筋钒合金化的实践与研究刘玉伟1(1.河北省承德市承钢公司炼钢厂)摘 要:承钢冶炼三级钢试验了钒铁,氮化钒和氮化钒铁3种不同的钒合金,钢筋性能均满足用户要求.通过对比分析其成分控制,认为对于钒吸收率,氮化钒铁最高,氮化钒次之,钒铁最低.对比其钢筋性能,在碳当量相同时,认为加氮化钒的钢筋其屈服强度和抗拉强度最高,氮化钒铁次之,钒铁最低,对低成本冶炼三级钢具有指导意义.关键词:三级钢筋; 氮化钒铁; 吸收率; 性能......
of statistical parameters reveals the superiority of the PLSR model over SVMR one.Key words:tunnel boring machine (TBM); performance prediction; rate of penetration (ROP); support vector machine (SVM...Utilizing partial least square and support vector machine for TBM penetration rate prediction in hard rock conditionsGAO Li(高栗)1, 2, LI Xi-bing(李夕兵)1(1. School of Resources and Safety Engineering......
with different channels and error correction codes. Analysis on the performance measures confirm that the Turbo + CC code in 4×4 configurations exhibits better performance. Key words: bit error rate (BER..., leading to high data rate as well as high performance and it has larger utilization in high-speed wireless transmission [25]. The increase in the transmission bandwidth efficiency of the combined MIMO-OFDM......
that the transition load is found for a constant sliding velocity. When the loads are higher than the transition load, the wear rate increases sharply. The composites exhibit superior wear resistance...: magnesium matrix composite; whisker; wear mechanism; wear rate 金属基复合材料的耐磨性在磨粒磨损和有润滑的情况下优于基体[1?7].SHARMA等[1]指出,AZ91镁合金中引入长石颗粒可以明显改善其耐磨性能.LIM 等[2]研究发现加入Al2O3颗粒能使合金的耐磨性最高提高1.8倍.上述报道在增强相体积分数较低的情况下,增强体......
instrument. The electrochemical properties of these alloys such as discharge capacity, cycling performance and high rate dischargeability were investigated by battery testing instruments in alkaline...Electrochemical performance of alloys Ho5Fe3Co12 and Ho33.3Co66.7赵允红,何维,张永志,曾令民Key Laboratory of Nonferrous Metal Materials and New Processing Technology, College of Materials Science and Engineering......
instrument. The electrochemical properties of these alloys such as discharge capacity, cycling performance and high rate dischargeability were investigated by battery testing instruments in alkaline...Electrochemical performance of alloys Ho5Fe3Co12 and Ho33.3Co66.7赵允红,何维,张永志,曾令民Key Laboratory of Nonferrous Metal Materials and New Processing Technology, College of Materials Science and Engineering......
Transformation and performance of granular sequence batch reactor under conventional organic loading rate conditionZHONG Chen(钟晨)1, WANG Ya-qin(王亚芹)1, Lü Jun-ping(吕俊平)1, LI Yao-chen(李耀辰)1, WANG..., China)Abstract:Laboratory experiments were conducted to investigate the transformation and performance of a granular sequence batch reactor (SBR) under the conventional organic loading rate (OLR......
Vanadium-doped TiO2-B/anatase mesoporous nanotubes with improved rate and cycle performance for rechargeable lithium and sodium batteriesD.P.Opra1,S.V.Gnedenkov1,A.A.Sokolov1,2,A.B.Podgorbunsky1,A..., demonstrating superior rate characteristics for secondary lithium batteries. Furthermore, V-doped Ti O2-B/anatase mesoporous nanotubes show promise performance as anode material for sodium-ion batteries......
J. Cent. South Univ. (2016) 23: 3092-3099 DOI: 10.1007/s11771-016-3374-8 Preparation and photocatalytic performance of ZnO/ZnGa2O4 composite microspheres ZHANG Li(张丽)1, DAI Chao-hua(戴超华)1, ZHANG Xiu... and the calcination temperature of 400 °C. The maximum photocatalytic degradation rate of MO was 97.1% within 60 min under the simulated sunlight irradiation, which is greatly higher than that of ZnO......
Performance of M-QAM, M-DPSK and M-PSK with MRC diversity in a Nakagami-m fading channelAlam S. M. Shamsul Alam, Choi GoangSeog(Department of Information and Communication Engineering,Chosun... Nakagami-m fading channels. Moreover, the ASER was estimated and evaluated by using the maximal ratio-combining (MRC) diversity technique. Simulation results show that an error rate of the fading channel......