查询词典 trace elements

When propagating light\|ray passes through two fixed points in the gradient index mediums and a cuspidal variable\|point （at this point the trace equation of propagating light\|ray is non\|differentiable） at the borderline of two different GRIN mediums, the mathematical relationship, which the trace equation of propagating light\|ray and borderline equation of two different GRIN mediums should satisfy, is derived by the Fermat's principle and calculus of variation.

当光线通过梯度折射率介质中两个固定点和两个GRIN介质界线上的可动尖点（光线轨迹方程的不可微点）时，由费马原理和变分法运算推得传输光线的轨迹方程与两种不同GRIN介质的界线方程应满足的微分关系式。

Using this system can determinate exactly trace tin and trace germanium simultaneous and eliminated the disturbing of theirs each other.

在该体系下，可以比较准确的测定出同时存在于溶液中的微量锡与微量锗的含量，消除了两者之间的相互干扰。

The idea that experience leaves some trace in the brain goes back at least to Plato's Theaetetus metaphor of a stamp on wax, and in 1904 the German scholar Richard Semon gave that ghostly trace a name: the engram.

其实，有关体验会给大脑留下某些痕迹的想法，最早可以追溯到柏拉图有关蜡上印记的比喻中，而到了1904年，德国学者塞蒙把这种精神性的痕迹命名为：记忆印迹。

The trace element contents of Eupatorium lindleyanum DC in different parts in different harvest periods and their correlation to their pharmacological activities were analyzed by determining the pH value and trace element contents of Eupatorium lindleyanum DC in planting field.

方法］通过则定了野马追种植大田内土壤的pH值及其微量元素的含量，分析了野马追不同采收期各部位的微量元素含量以及其与药理活性间的相关性。

A method for determining trace Cu is described based on the catalytic effect of trace copper on the decolorizing oxidation reaction of acid fuchsin by potassium periodate in the presence of a,a'-dipyridyl.

本文研究了在α，α′-联吡啶存在下，铜离子催化高碘酸钾氧化酸性品红褪色的新指示反应及动力学条件，建立了催化光度法测定痕量铜的方法。

The representation of sequences is very helpful for the research of their linear complexity,so this paper we first research trace representation of periodic sequences,and the trace representation of a New Generalized Cyclotomic Sequence of order two of length pq is given,then for 2~mp~n period binary sequences,where p is an odd prime and 2 is a primitive root modulo p~2,we present a relation-ship between the linear complexity and the minimum value k for which the k-error linear complexity is strictly less than the linear complexity and have the upper bound and lower bound of the value k, finally we discuss the k-error linear complexity of legendre sequences,also have the upper bound and lower bound of the value k,and discusses the situation where the linear complexity drop again for some Legendre sequences.

序列的表达形式对于其线性复杂度的研究是十分有帮助的，本文我们首先研究的是周期序列的迹表示，给出了2阶pq长度的扩展分圆序列的迹表示，然后讨论了周期为2~mp~n(m≥2)序列的线性复杂度与使得线性复杂度变小的最小的k值的关系，给出了k值的上界和下界，这里p为奇素数，2是模p~2的本原根，并通过例子讨论了其线性复杂度的稳定性，最后对Legendre序列k-错线性复杂度进行了分析，也给出了k值的上界和下界，并对某些Legendre序列讨论了线性复杂度再次下降的情况。

The separation and enrichment of trace tin and trace germanium was researched in this paper.

本文主要阐述的是微量锡与微量锗分离与富集的研究。

After cloud Milky Way et al. do obeisance into his hanger-on, that kind constrains the strength is pulled out by a faint trace leaves, that steadfast belief also in a faint trace vacillation.

在云天河等人拜入他门下后，那种压抑的力量被一丝丝抽离，那种坚定不移的信仰也在一丝丝动摇。

But only a trace of transition metal ions incorporate into the framework of zeolites may provide very interesting catalytic property. Therefore the characterization of a trace of heteroatom in zeolite is very important.

然而，即使很少量的杂原子进入到沸石骨架内就会引起催化性质的较大变化，因此微量杂原子的表征也十分重要。

Powder sets of needles hidden in the trace lines needle, needle and the needle remaining trace comparison revealed.

擞和针在绣欣赏品上多用来绣树干和石头。11、擞和针：针法组织与散套大同小异，不同的是散套针线条重叠，擞和针线条平铺。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。