查询词典 trace elements

To estimate the high signal to noise ratio in every recorded trace using quantitative method and erase the recorded traces with low signal to noise ratio so as to form a standard trace with high signal to noise ratio.

在形成标准道时，利用定量估计信噪比的方法，对每个记录道分段进行信噪比估计，剔除信噪比低的记录段从而形成高信噪比的标准道。

Applied widely in the data encryption, pseudorandom sequences can be generated not only by hardware but also by trace function, and it is found that the sequences generated by trace function are much better than those generated by hardware, especially in the aspects of correlation properties.

摘要伪随机序列被广泛应用于数据加密，它既能利用硬件产生，也可以利用有限域上的迹函数来生成，并且由后者生成的序列的密码特性远远优于前者，特别是在相关函数方面更是如此。

Basing on the separation of trace plutonium from uranium matrix,the operating parameters of MC-ICP-MS were studied and optimized for determining the isotope ratio of trace plutonium, such as the adjustment of resolution, selection of mode of ion extraction, elimination of background and interference, etc.

本工作在铀钚化学分离的基础上，对影响MC-ICP-MS法精确测量痕量钚同位素丰度比值的仪器条件进行了优化，研究了仪器分辨率、离子提取模式的选择、"背景和干扰"等参数的影响，探索研究了MC-ICP-MS上质量偏倚的校正方法。

Based on analysis of generation algorithms of cutter－ contact point trace in NC machining of sculptured surfaces,in this paper,a property on continuity of cutter－ contact point trace is suggested and proved.

在分析国内外关于自由曲面数控加工中刀位点轨迹生成算法的基础上，提出了一个关于刀触点轨迹连续性的命题并加以证明。

Achieved the true maxim power point trace of solar array by adapting an improvedMPPT control, which trace the load power instead of the power of solar array.

分析了发生孤岛效应的原因，采用了基于主动频率偏移方式实现孤岛效应防止。6。

A memory model describes, given a program and an execution trace of that program, whether the execution trace is a legal execution of the program.

内存模型描述给定程序的某个特定的执行轨迹是否是该程序的一个合法执行。

Among these are four axial bundles, a branch trace, a lateral and a median leaf trace diverge in acropetal sequence, repeated regularly at alternate nodes.

一个枝迹，一个侧生叶迹和一个中间叶迹分散在向顶的序列中，在连续的节上重复。

Collagenase activity was defined as the radioactivity extractable by 50% dioxane. Clostridial collagenase was used as a standard. The lower limit of this assay method was 0.01 units of clostridial collagenase. Among 17 glaucoma eyes, 6 had trace collagenase activity (around 0.01 units) in aqueous humor; and for cataract eyes, 8 out of 27 had trace collagenase acitivty.

我们所采用之测量方法可侦测出约0.01单位以上的胶原酵素；一般前房液之胶原酵含量非常低，许多患者无法以我们之方法利得胶原酵素之存在：17位青光眼患者中，只有6位可於其前房液中到得约0.01单往之胶原酵素；27位白内障急者中，有8位可测得微量胶原酵素；二者在统计学上与太大差异存在。

In this research, we used Trifluoroacetic anhydride as a derivatizing agent to esterify the trace glycerol in biodiesel, followed by the determination of trace glycerol using microwave assisted headspace SPME extraction technique combined with GC-ECD.

本研究利用三氟醋酸酐与生质柴油中的微量甘油进行酯化反应，反应后的衍生物以本实验室开发的微波辅助顶空固相微萃取装置采样，并以气相层析仪搭配电子捕捉侦测器作分析。

The topologic architecture of metazoan trace fossils may be subdivided into 3 clusters, 8 basic topologic configurations, 3 combined topologic configurations and 21 topoichnologic kinds, which are considered to be related to ethologic classifications of trace fossils in origin.

后生动物遗迹的拓扑结构可归并为3 族、8 种基本拓扑型、3 种组合拓扑型和21 种拓扑遗迹类，它们与习性类有较好的成因联系。

Chinese traditional virtue is humility and wariness,the compliment and praise to the others should be declination

中国人的传统美德是谦虚谨慎，对别人的恭维和夸奖应是推辞。如

We bought this house on the never-never.

我们以分期付款的方式买下这座房子。