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Abstract: Technical progress of uranium extraction in recent years is introduced, including new processes such as uranium extraction by supercritical CO2 fluid, calixarene, capillary electrophoresis, oscillation; application of novel extractants and absor
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文摘:介绍了近年来铀提取方面的技术进展，包括提铀新工艺:超临界CO2流体提取铀,杯芳烃提铀,毛细管电泳分离铀,振荡法萃取铀；各国新型萃取剂和吸附剂的应用及三废治理。 |
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Abstract: Technology of computer and Internet has been widely applied in various trades, which, materially and technically, provides supports for colleges to set up electronic reading rooms and to expand functions in information service.
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摘要:计算机、网络技术的应用，为高校图书馆建设电子阅览室，拓展信息服务功能提供了有力的物质和技术保障。 |
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Abstract: Temperature field of hollow ingot solidification is simulated by FEM.To different mould,effect of heat transfer coefficient between inner sleeve and cooling medium and thickness of core refractory on final position of solidification,the highest
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文摘:对空心钢锭凝固过程的温度场进行了有限元分析，对不同锭型结构的芯部换热系数、耐火材料厚度对最终凝固位置、内筒壁最高温度及缩孔疏松的影响进行了对比，并讨论了耐火材料典型部位的温度随凝固时间的变化。 |
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Abstract: Temporal properties of the second-ordre process with a Chirped incident pulse are theoretically calculated.The chirp influences the irradiance and the pulse shape of the second harmonic wave with large phase mismatch.The phase distortion of all
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文摘:讨论了在大相位失谐下,基波为频率啁啾脉冲的二次谐波产生过程,结果表明选取合适的啁啾参量可以使二次谐波的光强提高,但同时会使其波形和相位发生变化.三波相位的畸变主要取决于入射的基波啁啾脉冲,而与相位匹配的失谐量关系不大. |
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Abstract: Temporal relational database model is extended from relational database by adding time processing，and Temporal object-orient database model is extended from object-orient database by adding time processing.
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文摘:时态关系数据库在关系数据库的基础上扩充了对时间数据的处理，而时态面向对象数据库则是在面向对象数据库的基础上扩充了对时间数据的处理。 |
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Abstract: Tensile reducer is one of the necessary apparatuses during the pipe production process at present.This paper deduces a multi-variation formula by using the energy principle and adopting upper limit method.The formula can be used to calculate the
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文摘:张减机是钢管生产中不可缺少的设备之一.本文从一般能量原理出发，采用上限法推导出一个多变量公式，利用该公式可求解电机功率、张力系数、轧辊转速、出口钢管壁厚、孔型椭圆度等参数，并且从理论上计算出电机负功率的存在. |
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Abstract: Tertiary butylhydroquinone were synthesized by means of alkanisation with actalyst of cation exchange resin in this paper,and discusses several effective fators to the yield of tertiary butylhydroquinone,including the type of cation exchange res
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文摘:以强酸型阳离子交换树脂为催化剂通过烷基化合成叔丁基对苯二酚，并系统地研究了树脂型号、物料比、反应时间等因素对合成收率的影响，确定了最佳反应条件。 |
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Abstract: Tesco, the leading UK supermarket, has targets DIY in non-food drive recently. The article introduces its features in non-food product selling.
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摘要：介绍了英国零售业巨头塔斯科近年来在发展大卖场非食品类商品领域销售方面形成的一些特色。 |
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Abstract: That the prevention measures are not enough at the prop-drawing operation in the stope is analysed at this paper,and the structure and the site application effect of DTH push-protecter are introduced.
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文摘:分析了回采工作面回柱放顶作业中防护措施的不足，介绍了DTH推护器的结构和现场应用效果。 |
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Abstract: The 15 rice traces in the pottery of Dulingao ruin were studied with scanning microscope.The like - indiea in grain shape and like - japonica of bi - peaked tubercle and the few remaining charac-ters of O. rufipogon of Chaling area were observed
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文摘:用扫描电镜对独岭坳遗址红烧土中解剖出来的15粒水稻印痕进行观察研究，发现粒形似籼而双峰乳突纵横排列特征近于粳稻，尚留有茶陵野稻的某些特征，认定为属于二向演化的原始小粒栽培粳稻类型。 |
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Abstract: The 2＃ rock detonator dynamite Cu-steel combined plate and testprocess of welding parameter are introduced.The particular semi-cylinder experiment method is introduced.The test result is applied in production and good benefit is obtained.
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文摘:介绍了尝试应用2＃岩石炸药爆炸焊接铜钢复合板及得出其工艺参数的试验过程，采用了独特的半圆柱试验方法,试验结果应用于实际生产中，获得了良好的经济效益。 |
