查询词典 x-rays

Let x: M→S(superscript n+1)(n≥3) be a hypersurface in the (n+1)-dimensional unit sphere without umbilic points. Denote the Mbius metric, the Mbius form, the Blaschke form and the Mbius second fundamental form of x by G,Ф, A and B, repcectively, which are Mbius invariants in Mbius differential geometry.

设x： M→S(上标 n+1)(n≥3)是n+1-维单位球中的无脐点超曲面，Mbius不变量G，Ф，A和B分别表示x的Mbius度量，Mbius形式，Blaschke形式和Mbius第二基本形式。

It is concluded that the micro beam X-ray fluorescence spectrometer with X-ray lens can be used in the microanalysis of plan...

结果表明使用X光透镜的微束X射线荧光分析方法可以实现植物样品的微区分析，有助于进一步了解植物的生长与元素迁移的关系。

We utilized the electrochemistry, scanning electron micrograph, X-ray fluorescence spectroscopy and X-ray photoelectron spectroscopy to demonstrate this mechanism.

我们用电化学方法、扫描电镜、X射线光电子能谱和X射线荧光光谱法对此进行了证明。

3000W heater hybrid DMX-512 electronic temperature control signal control system Mirror Pipeline smoke output regulation approximately 3,000 cubic meters per minute bell smoke output X-4 LCD set When quantitative controller, five 5-meter line connecting an election accessories : remote X Boards

3000W混合加热器·DMX-512信号控制·电子温度控制系统·镜面管道技术·烟雾输出量调节·大约3000立方米/分钟的烟雾输出量·X-4液晶定时定量控制器，5米5芯连接线1条·选配件：X-3遥控套件

If ris also irreducible in Z_nand f~n~κ≡fmodn,r(xfor all f∈Z_nthen we call n a Carmichael number of orderκmodulo r.Denote the set of all such numbers by C_κ,r(x.Define C_κ=∪_r(xC_κ,r(x,where rpasses through all monic irreducible polynomials over Z of degreeκ.We call elements of the set C_κCarmichael numbers of orderκ.ZHU and SUN[Journal of Sichuan University,42;1(2005), 47-51]first gave a necessary condition for Carmichael numbers of order 3.Then they gave a sufficient condition for Carmichael numbers of order 3,but did not find any such numbers less than 10~8 satisfying the sufficient condition.At last,they asked three questions;1.is the necessary condition also sufficient?

f∈Z_n，就称n是模r的κ阶Carmichael数，用C_κ，r(x表示所有这种数的集合，定义C_κ=∪_r(xC_κ，r(x，这里r跑遍Z中所有κ次首一不可约多项式，C_κ里面的元素就称为κ阶Carmichael数，C_κ称为κ阶Carmichael数集，朱文余和孙琦[四川大学学报，42；1(2005)，47-51]首先给出了3阶Carmichael数的一个必要条件；然后又给出了这种数的一个充分条件，并发现10~8内没有满足此充分条件的这种数；最后他们提出三个问题；一、问必要条件是否也是充分的？

We suppose that C is a category with involution *, a is a morphism of Category C, h and k are inversive symmetrical morphisms of category C. If there is a morphism x, satisfyingthen x is called a general Moore-Penrose inverse of a on morphism h and k .

设C是具有对合*的范畴，α是范畴C的态射，h，k为范畴C的可逆对称态射，如果存在一个态射x，使得则称x为α的关于h，k的广义Moore-Penrose逆，记为α_~+。

Female mosaicism of the X chromosome has major implications for human health and disease and is the leading cause of female protection from X-linked genetic disorders.

女性作为X染色体的杂合子在人类的健康与疾病中及重要作用，并可避免X连锁遗产性疾病在女性中发生。

We also know that ArcSin is an odd function and therefore the second order term B*X*X is of no use in the approximation.

我们也知道 ArcSin 是一个奇函数，因此二次项 B*X*X 在近似中没有用。

X .. Open interval with lower bound x

x 。。||开放的间隔区间，下界是 x

Let X be a finite set and let be a family of distinct subsets of X; then the ordered pair H= is called a hypergraph.

设 X 是一个有限集合且ξ是 X 的相异部分集合所形成的集合族；则序对 H =称为一个超图形。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。