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In this paper, the progresses acquired in the studies of natural analogy are summarized, including a comparison of structural properties, radiation damage and chemical composition between uraninite and UO2, combination and paragenesis of alteration products of uraninite, chemical composition of uraninite and its secondary phases, mobility of analogy elements in the process of uraninite alteration. In addition, the problems in next studies are pointed out, e. g., characterization of micro-structure of secondary uranium minerals, high-resolution analyses of trance elements distributed in original and secondary uranium minerals using laser microprobe analyzer, composition of underground water, simulation experiments.

系统地总结了天然类比研究的现状，包括沥青铀矿与UO2的可比性、沥青铀矿风化产物的共生组合和共生次序、沥青铀矿及其风化产物的化学成分特征、沥青铀矿风化过程中类比元素的迁移性等；并初步指出了进一步研究的方向，如铀酰矿物的微结构研究、类比元素在沥青铀矿和铀酰矿物中分布的激光探针研究、地下水成分分析、模拟实验等。

Characterization of the catalysts indicates that the Cu species is more stable in the VCe1-xCux-NaCl than those in the supported catalysts, and the reduced copper species with low valance might be the active sites.

通过各种表征手段表明，在复合氧化物中铜物种能够以孤立的状态稳定存在，经过还原后，还原态的低价态铜物种可能是反应的活性中心。

We give a new 2-D graphical representation of protein sequences based on nucleotide triplet codons in the half complex plane, which has no degeneracy. Meanwhile using main characterization of complex vector: module and phase, we give a kind of numerical description of protein sequences.

利用这三个递归公式给出了RNA二级结构序列的1-D、2-D和3-D图形表示，进一步利用1-D图形表示给出了关于RNA二级结构序列频谱分析的方法。

Electropolymerized pyrrole to polypyrrole was fabricated on gold electrodes and used as sensors. Cyclic voltammeter was applied to the characterization of the sensing material Ppy.

本文以电聚合方式，将吡咯聚合成的感测材料聚吡咯(polypyrrole， Ppy)薄膜镀制於金电极上，聚合完成的Ppy薄膜再经过循环伏安仪来作定性分析。

This introduces several basic manipulative techniques of preparative chemistry and quantitative volumetric analysis including preparation and characterization of a derivative, recrystallization, determination of equivalent weight by using titration and determination of melting points.

这里介绍了几个基本的合成技术和定量分析法，包括衍生物的合成及其结构表徵，再结晶，用滴定法确定等当量和熔点测定。

311 Is the first of a three-term laboratory subject sequence for chemistry majors. Experimental work emphasizes development of fundamental laboratory skills and techniques: volumetric and colorimetric analysis; nuclear magnetic resonance; preparation, purification, and characterization of chemical substances; and data analysis.

5.311课程是主修化学的学生们三个学期的实验课程中的第一门，也是基础的一门，实验室里的工作十分强调基础实验技能与技术的培养：容积计量分析与色度分析；核磁共振；物质制备；物质提纯；物质的化学性质；数据分析。

A new characterization method has been established for the vulcanization procedure in reactive blending RMAs.

建立了以流变仪表征橡胶在沥青中的硫化过程的新方法。

It analyses the characterization of typical type curve and the influential factor of well-test curve ,which includes non-dimensional offsetting, non-dimensional length of horizontal welk equivalency pressure point, interporosity flow coefficient, storativity ratio and the boundary condition.

分析了双重介质水平井典型曲线特征以及影响水平井试井曲线特征的因素，得到了其影响因素主要有无因次偏心距、无因次水平井长度、等价压力点、储能系数、窜流系数以及油藏的边界条件。

Well log dependent reservoir characterization is a important part of reservoir description.

基于测井资料解释的储集层描述是油藏描述的重要组成部分。

Overall, this work has completed a combined collagen immobilized process in wet cell system, followed by on-line XPS characterization.

本研究确认可在真空湿室反应室系统完成固定蛋白质程序，以及即时表面结构分析。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。