共搜索到8857条信息，每页显示10条信息，共886页。用时：0小时0分0秒406毫秒
......
Impact coefficient and reliability of mid-span continuous beam bridge under action of extra heavy vehicle with low speedLIU Bo(刘波)1, 2, WANG You-zhi(王有志)1, HU Peng(胡朋)3, YUAN Quan(袁泉)1(1. School... show that deck roughness has an important function in the effect of the vehicle on the bridge. When an extra heavy vehicle passes through the continuous beam bridge at a low speed of 5 km/h, the impact......
. By the measurement of contact angle, it is indicated that monoclinic and hexagonal pyrrhotites float well and are easily activated by Cu2+ when dithiophosphate is used as the collector. Using sodium diethyl... flotation occurring at about 300 mV (vs SHE). Key words: flotation; pyrrhotite; pulp potential; contact angle 1 Introduction Pyrrhotite is a common sulphide mineral which has a disordered NiAs structure......
......
Impact of Yb3+/Er3+ ions on crystallization of phosphosilicate glass melts鲁强1,刘树江1,曹万强2,赵萍11. Key Laboratory of Processing and Testing Technology of Glass & Functional Ceramics of Shandong Province... for nucleation ΔG* as a function of reduced temperature T/Tm were calculated with an assumption of wetting angle θ=90o, Yb3+/Er3+ doped melt tended to firstly nucleate as compared to undoped melt at small......
Impact of Yb3+/Er3+ ions on crystallization of phosphosilicate glass melts鲁强1,刘树江1,曹万强2,赵萍11. Key Laboratory of Processing and Testing Technology of Glass & Functional Ceramics of Shandong Province... for nucleation ΔG* as a function of reduced temperature T/Tm were calculated with an assumption of wetting angle θ=90o, Yb3+/Er3+ doped melt tended to firstly nucleate as compared to undoped melt at small......
) Abstract: The mechanical properties, microstructure and impact property of Ti-6Al-3Nb-2Zr-1Mo alloy plate with thickness of 10 mm after annealing at 800, 840, 880, 920 and 1 040 ℃ were studied. The results show that the best annealing schedule is (880-920 ℃, 1 h, AC), in order to ensure the high comprehensive performance of Ti-6321 alloy. Key words: Ti-6Al-3Nb-2Zr-1Mo; impact properties; heat......
Determining role of heterogeneous microstructure in lowering yield ratio and enhancing impact toughness in high-strength low-alloy steelYi-shuang Yu1,Bin Hu1,Min-liang Gao1,Zhen-jia Xie1,Xue-quan... consisting of soft intercritical ferrite and hard tempered martensite, resulting in a low yield ratio(YR) and high impact toughness in a high-strength low-alloy steel. The initial yielding and subsequent......
Application of artificial neural network for calculating anisotropic friction angle of sands and effect on slope stabilityHamed Farshbaf Aghajani, Hossein Salehzadeh, Habib Shahnazari(School of Civil... angle and the loading orientation. All principal stress rotation tests in the literatures were processed via an artificial neural network. Then, with sensitivity analysis, the effect of intrinsic soil......
......
