查询词典 Valence

Experimental investigations and theoretical analyses on the structure and electromagnetic properties of the samples were systematically made with XRD~ DTA~ VSM and resistance measurements. The valence electron structures of the Feu solid solutions were calculated by means of the empirical electron theory of solid and molecules.

利用XRD、DTA、VSM及不同温度下的电阻测量，对合金材料的结构、电磁学性能等进行了实验和理论研究，用固体与分子经验电子理论计算了Fe-Cu合金的价电子结构。

Whereas the calculation result of electric structure shows that the front valence electron of face (001) of gibbsite is active correspondingly. That is there may be some activity points on this face.

氢氧化铝的(001)面的前线价电子较为活跃，其晶面可能存在与铝酸钠溶液中不同形态的铝酸根离子或者是晶体生长基元发生键合的"活性点"。

Pure iron specimens were implanted by nitrogen ions with a fluence of 7×1017 ions/cm2 using ion beam implantation at an extracted voltage of 40kV.Composition and valence studies were carried out by X-ray photoemission spectroscopy;Glancing angle X-ray diffraction was employed to examine the phase transformation.

采用40kV的氮等离子体离子注入工业纯铁，注入剂量为7×1017ions/cm2，X射线光电子能谱研究表面注入层元素的成分和价态，X射线衍射分析注入层的物相转变，采用恒电位极化腐蚀试验研究了离子注入后材料在人工模拟体液中腐蚀行为。

The result showed that the one-valence cationsaccelerate the hydration process of α-hemihydrate gypsum greatly because they improvethe dispersed degree of α-hemihydrate gypsum particles due to the remarkable effect ofincreasing theζpotential; the effects of bivalent and trivalent cations on ζpotentialdecrease in turn, compared with monovalent cations, the effects on both the disperseddegree of α-hemihydrate gypsum particles and the setting time of paste are little.

研究还表明：由于一价阳离子能较大程度地提高石膏浆体的ζ电位，因而有效地提高了石膏颗粒的分散程度，对α半水石膏的水化加速作用很大，而二、三价离子对石膏浆体的ζ电位影响依次减小，对半水石膏颗粒的分散程度和浆体凝结时间的影响均不如一价阳离子作用大。

And the Randic-Kier index,χ, is defined as,χ=∑C, whereC, and δ is the calculated valence delta for the carbon atom or heteroatom.

上标 mχ定义为χ∑C，子图项，δ为碳原子或杂原子价点价。

Valence characterized by the transfer of electrons from atoms of one element to atoms of another during the formation of an ionic bond between the atoms.

电价在原子间形成离子键的过程中，由电子从一种元素的原子转移到另一种元素的原子所表示的价

A plausible charge distribution of Fe and Mo valence states is proposed, and the stability of the compounds is discussed. Polycrystalline samples of 〓(0.8≤x≤1. 5) are prepared by solid-state reaction at high temperature. The alteration of the relative content between Fe and Mo in 〓 exhibits a significant effect on the crystal structure and the ionic ordering of the compounds.

采用传统高温固相烧结反应法合成了非化学配比的双钙钛矿型〓系列化合物。X射线粉末衍射数据分析结果表明，非化学配比的双钙钛矿结构〓（0.8≤x≤1.5）系列化合物的晶体结构随着Fe含量x的变化在x=1.2附近有一个由四方14/mmm对称向立方Fm〓m对称的结构结构相变发生。

Studies on the characterization of molecular sieves showed that Co and Mn incorporated into the framework by isomorphous substitution of Al and both of them had the same valence (+2) in the as-synthesized and calcined samples.

它们在分子筛焙烧去除模板剂过程中价态不发生变化，均为+2价。

The n-type gate modulation could be explained by the bending effect of valence band in the Schottky-barrier junction. The photoconductive diode and optical switch behavior was demonstrated for the first time from a C/CNX multi-walled nanotube junction with a Schottky barrier. Theconductivity of nanotube can be reversibly changed by 3 to 4 orders of magnitude when the 5 mW cm2 white lights was turned on and off.

器件原理是栅极静电场调节碳纳米管和CNx纳米管间的Schottky势垒的高度和宽度，从而影响载流子的传输。8首次利用单根CN万／C纳米管作为半导体材料制备了Schottky光导二极管和光开关。

The x-ray photoelectron spectroscopy of La-Pr-Mn-O reveals that the valence state of Pr include Pr〓, which indicates that the La-Pr-Mn-0 manganite is another new electron-doped CMR compound.

XPS谱研究表明：La-Pr-Mn-O中有pr〓存在，而且这种材料几乎在整个掺杂范围都是单相。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。