标上

Based on marking status, the structure , theory and problems of the galvanometer scanning laser mark system are elaborated with emphasis on hardware and software.

在总结激光打标现状的基础上，着重从硬件软件两个方面阐述了振镜扫描激光标刻系统的组成、工作原理及存在的问题，通过举例展现了激光标记的优点，并对其发展趋势进行了展望。

But the ruled surfaces in R^3 or R(superscript 3 subscript 1) have vanishing Gauss curvature if and only if they are developable.

这与低维情形绝然不同，在R^3或R(上标 3 下标 1)中只有当直纹面是可展时，高斯曲率才为0。

The results indicated that under photooxidation condition, the addition of "RuBP regeneration system" and sodium glycolate increased qP and Φ, while R5P, DHAP and HCO(superscript – subscript 3) increased qN, compared to nonphotooxidative control.

结果表明，光氧化条件下外加"RuBP再生系统"和乙醇酸钠可提高qP和Φ，而R5P、DHAP和HCO(上标–下标 3)可提高qN，显示其对光氧化下叶绿体PSII活性有一定程度的保护作用。

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It has been used to determine copper ion in waste water samples from hydrometallurgy of copper. The relative standard deviation (n=8) for the determination results of two samples were 0.8% and 1.4% and the recovery were 101% and 100%, respectively.

该离子选择性电极已用于湿法冶金废水中Cu(上标 2+)的分析，两个样品测定结果的相对标准偏差(n=8)分别为0.8%和101%，加标回收率分别为101%和100%。

For Lorentzian hypersurfaces in the Lorentzian sphere, the situation is different from in, the hypersurface may has complex eigenvalues.

对洛伦兹球面S(上标 n+1 下标 1)中的洛伦兹等参超曲面，情况有所不同，可能会有复的特征值。

The analytic expression for such kind of hypersurfaces is given. Consequently, any umbilical Lorentzian isoparametric hypersurfaces of type Ⅱ with minimal polynomial^2 of A are the parallel hypersurface of M.

并且形算子A的最小多项式为(λ0a)^2的任何Ⅱ型全脐洛伦兹等参超曲面局部地与上述超曲面的平行超曲面叠合，从而完成了S(上标 n+1 下标 1)中的Ⅱ型全脐洛伦兹等参超曲面的分类。

This project cut down the quantity of campaigner of index word and reduces the complexity of automatic indexing in pre-processing.(2) Based on analyzing the relevance of index word, the paper presents a new text categorization model, which is based on the relevance of index term.

这该方案以帕欧理论为依据，减少了自动标引过程中预处理信息量，从而降低了文本标引的复杂度；(2)在对标引词的相关性进行全面分析的基础上，提出了一种新的文本分类的模型——基于标引词相关度的文本分类。

The necessary and sufficient condition for the existence of 2-dimensional minimal realization is given, which is described by the relation of elements of the infinite sequence and is easy to check.

给出了存在2维最小实现的充要条件，该条件是用无穷序列｛g｝(上标∞下标 0)元素之间的关系描述的，因而容易判断；同时，用涂奉生提出的结构标准形和最小实现算法给出了2维最小实现的构造方法，从而完全解决了2维最小实现问题。

Based on the cross-ratio invariance theorem, a new method for acquiring characteristic points in the calibration of line structure-light sensor was proposed.

提出了一种基于双重交比不变性的线结构光传感器标定点获取的方法，利用该方法和设计的标定靶标，可方便的获取大量的高精度的标定点，解决了线结构光传感器标定点不易产生且数量少的问题，从而可以在一定程度上提高标定的精度。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷