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喷雾热分解法制备氧化锆纤维的过程研究 被引量:10
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作者 周晓东 古宏晨 ZHANGSC 《无机材料学报》 SCIE EI CAS CSCD 北大核心 1998年第3期401-406,共6页
本文研究了喷雾热解法制备氧化锆纤维的过程.用醋酸氧锆为前驱体能够制备出直径1~2μm、长度1~5cm的氧化锆纤维.研究了前驱体溶液浓度、表面张力、粘度对产品形貌的影响.通过控制操作条件,可以得到实心或空心纤维.
关键词 氧化锆纤维 喷雾热分解 无机纤维
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矿井提升中减速度检测方法的动力学分析 被引量:9
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作者 姜耀东 葛世荣 TadGolosinski 《中国矿业大学学报》 EI CAS CSCD 北大核心 1999年第5期473-478,共6页
研究了提升容器在运行过程中与井筒装备相互作用的动力学性质,建立了矿井提升过程中罐笼的3 种基本动力学模型,即冲撞模型、非直线模型和凸出模型,以对应于罐道局部的变形和弯曲、罐道由于连接安装误差或井筒局部围岩变形而导致在... 研究了提升容器在运行过程中与井筒装备相互作用的动力学性质,建立了矿井提升过程中罐笼的3 种基本动力学模型,即冲撞模型、非直线模型和凸出模型,以对应于罐道局部的变形和弯曲、罐道由于连接安装误差或井筒局部围岩变形而导致在整体上的非直线形式以及罐道在连接接头处的凸出不平或局部的严重锈蚀等3 种不同的井筒钢轨罐道的缺陷形式.同时根据理论分析和现场调查,进一步提出了用加速度的速率变化作为判别罐笼是否安全运行的基本准则.研究表明,与现有的直接用加速度数值作为判别的准则相比,新的判别准则能更好地描述井筒钢轨罐道所存在缺陷的程度.作为应用,文中给出了几个在澳大利亚的现场检测的实例. 展开更多
关键词 矿井提升 检测方法 动力学模型 减速度
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地震荷载作用下桥梁碰撞的简化线性计算方法 被引量:1
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作者 穆翠玲 王文俊 MuHuimin 《国外桥梁》 2001年第4期41-44,共4页
地震荷载作用下 ,桥梁伸缩缝处的碰撞反应为一个复杂的非线性问题 ,提出了一种简化的线性计算方法 (等效能量阻尼法 ) ,从随机理论的角度推导出简化计算公式。并对一座实桥进行非线性有限元分析 。
关键词 桥梁 碰撞 地震荷载 等效阻尼 计算方法 伸缩缝
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Degradation of 2,6-di-tert-butylphenol by an isolated high-efficiency bacterium strain 被引量:1
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作者 ZHANGYa-lei FANGZhen-weit +3 位作者 XUDe-qiang XIAOYi-ping ZHAOJian-fu QIANGZhi-min 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2005年第2期271-275,共5页
An aerobic bacterium strain, F-3-4, capable of effectively degrading 2,6-di-tert-butylphenol(2,6-DTBP), was isolated and screened out from an acrylic fiber wastewater and the biofilm in the wastewater treatment facili... An aerobic bacterium strain, F-3-4, capable of effectively degrading 2,6-di-tert-butylphenol(2,6-DTBP), was isolated and screened out from an acrylic fiber wastewater and the biofilm in the wastewater treatment facilities. This strain was identified as Alcaligenes sp. through morphological, physiological and biochemical examinations. After cultivation, the strain was enhanced by 26.3% in its degradation capacity for 2,6-DTBP. Results indicated that the strain was able to utilize 2,6-DTBP, lysine, lactamine, citrate, n-utenedioic acid and malic acid as the sole carbon and energy source, alkalinize acetamide, asparagine, L-histidine, acetate, citrate and propionate, but failed to utilize glucose, D-fructose, D-seminose, D-xylose, serine and phenylalanine as the sole carbon and energy source. The optimal growth conditions were determined to be: temperature 37℃, pH 7.0, inoculum size 0.1% and shaker rotary speed 250 r/min. Under the optimal conditions, the degradation kinetics of 2,6-DTBP with an initial concentration of 100 mg/L was studied. Results indicated that 62.4% of 2,6-DTBP was removed after 11 d. The degradation kinetics could be expressed by Eckenfelder equation with a half life of 9.38 d. In addition, the initial concentration of 2,6-DTBP played an important role on the degradation ability of the strain. The maximum initial concentration of 2,6-DTBP was determined to be 200 mg/L. Above this level, the strain was overloaded and exhibited significant inhibition. 展开更多
关键词 2 6-DI-TERT-BUTYLPHENOL bacterium strain Alcaligenes sp. ISOLATION
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高压水射流辅助破碎煤和矿石 被引量:3
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作者 M.穆祖尔基维兹 陈广振 韩跃新 《国外金属矿选矿》 1994年第5期1-9,共9页
在美国密苏里Rolla大学高压实验室进行的研究表明高压水射流能够用来采掘煤和矿石、切割材料,也能用于破碎煤和矿石。如果将目前普遍应用的压力破碎原理转变为另一种原理,即颗粒在内部水射流压力作用下,通过使其内部原来存在的裂缝... 在美国密苏里Rolla大学高压实验室进行的研究表明高压水射流能够用来采掘煤和矿石、切割材料,也能用于破碎煤和矿石。如果将目前普遍应用的压力破碎原理转变为另一种原理,即颗粒在内部水射流压力作用下,通过使其内部原来存在的裂缝或裂纹的拉伸扩展而实现颗粒破裂,那么在破碎方面就会取得新的进展。我们在一些试验中对这一想法进行了研究。试验包括在有或没有压力载荷的情况下将不同的水射流作用于煤和岩石样品上。 展开更多
关键词 水射流破碎 矿石
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Corrosion of Refractory Alumina-Graphite and Alumina-Graphite-Zirconia in Slag Containing Titania
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作者 XUYuan LIUQing-cai +2 位作者 BAIChen-guang CHENDeng-fu JosephWNewkirk 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2004年第2期4-8,共5页
The wettability of the molten steel/Na 2O Li 2O SiO 2 B 2O 3 slag system was studied by a sessile drop method. It was found that the variation of the interfacial tension with the temperature in the molten stee... The wettability of the molten steel/Na 2O Li 2O SiO 2 B 2O 3 slag system was studied by a sessile drop method. It was found that the variation of the interfacial tension with the temperature in the molten steel/slag system is pretty little in the temperature range of 1 803-1 873 K. The interfacial tension remarkably decreases with increasing the oxygen content and/or sulfur content in molten steel. The contact angle for the molten steel/slag system is 153°-173°. 展开更多
关键词 WETTABILITY interfacial tension contact angle SLAG molten steel
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LATTICE DEFORMATION AND PHASE TRANSFORMATION FROM NANO-SCALE ANATASE TO NANO-SCALE RUTILE TiO_2 PREPARED BY A SOL-GEL TECHNIQUE 被引量:1
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作者 YanqunShao DianTang +2 位作者 JinghuaSun YekunLee WeihaoXiong 《China Particuology》 SCIE EI CAS CSCD 2004年第3期119-123,共5页
Nano-scale rutile phase was transformed from nano-scale anatase upon heating, which was prepared by a sol-gel technique. The XRD data corresponding to the anatase and rutile phases were analyzed and the grain sizes of... Nano-scale rutile phase was transformed from nano-scale anatase upon heating, which was prepared by a sol-gel technique. The XRD data corresponding to the anatase and rutile phases were analyzed and the grain sizes of as-derived phases were calculated by Sherrer equation. The lattice parameters of the as-derived anatase and rutile unit cells were calculated and compared with those of standard lattice parameters on PDF cards. It was shown that the smaller the grain sizes, the larger the lattice deformation. The lattice parameter a has the negative deviation from the standard and the lattice parameter c has the positive deviation for both phases. The particles sizes had preferential in-fluence on the longer parameter between the lattice parameters of a and c. With increasing temperatures, the lattice parameters of a and c in both phases approached to the equilibrium state. The larger lattice deformation facilitated the nucleation process, which lowered the transformation temperature. During the transformation from nano-scale anatase to rutile, besides the mechanism involving retention of the {112} pseudo-close-packed planes of oxygen in anatase as the {100} pseudo-close-packed planes in rutile, the new phase occurred by relaxation of lattice deformation and adjustment of the atomic sites in parent phase. The orientation relationships were suggested to be anatase {101}//rutile {101} and anatase <201>//rutile<111>, and the habit plane was anatase (101). 展开更多
关键词 nano-scale materials ANATASE RUTILE phase transformation TIO2 sol-gel technique
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