查询词典 valence

Chemistry having more than one valence, or having a valence of 3 or higher.

具有一个以上的化合价的，或具有三价或更高价的。

Forbidden-band-width of mono-clinic phase of bismuth vanadate (mBiVO4) is high enough to 2.3-2.4 eV, it could be valence band to carry out entirely that hole band degrade organic pollutants,and the conduction band possesses high oxidizability to make for reduction of photoinduced electron,and oxidation potential of its valence band with 2.4 eV nearby could achieve decomposition of water and degradation of organic pollutants under visible light.

单斜晶相钒酸铋(mBiVO4)的禁带宽度为2.3 - 2.4 eV，它足够高的价带完全可以实现空穴对有机污染物的降解，并且导带位置也有利于光生电子的还原，具有较高的氧化能力，且其价带氧化电位位于2.4 eV附近，可实现在可见光下分解水和降解有机污染物。本文综述了mBiVO4应用于降解污染物、光解水产氧以及光电化学分解水的研究概况，及其在光催化降解有机物等领域的应用前景。

We found out one kind of new orange-red long afterglow material La2O2S: Eu3+, Mg, Zr.2 In the phosphor Gd2O2S, Mg, Ti which was prepared by high-temperature solid-state method, the orange afterglow phenomenon can be seen after illuminated with UV light.3 Using the high-temperature solid-state method, Gadolinium oxysulfide phosphors doped with rare earth ions were synthesized. We can observe the red or orange phosphorescence in Gd2O2S doped with Eu3+, Sm3+, Tm3+, Yb3+, Dy3+, Er3+, Nd3+or Ho3+. This is a new result of the long afterglow phosphors research.4 Using the microwave radiation method, the new Sm3+ doped gadolinium oxysulfide phosphor, which has the orange-red long afterglow emission after illuminated with UV light or visible light, was synthesized for the first time.5 In fluorescent materials YOX doped with europium ions, the long afterglow phenomenon wasnt observed but the blue luminescence of Eu2+ and red luminescence of Eu3+ are simultaneously examined. This is a new result of the valence stability and change of Eu2+ in yttrium oxyhalide .We systematically studied the effects of the host, addition agents and reaction atmosphere on the valence change and fluorescence property of europium ions.

经过系统的研究总结得到以下的结论与成果： 1采用高温固相反应法合成了一系列稀土离子掺杂的硫氧化镧发光粉，发现了该体系中Eu~(3+)的长余辉发光，从而得到一种迄今未见文献报道的红色长余辉发光材料：La_2O_2S：Eu~(3+)，Mg，Zr； 2在Gd_2O_2S，Mg，Ti磷光粉中观察到橙色的长余辉发光现象； 3采用高温固相反应法合成了一系列稀土离子掺杂的硫氧化钆磷光粉，在掺杂Eu~(3+)、Sm~(3+)、Tm~(3+)、Yb~(3+)、Dy~(3+)、Er~(3+)、Nd~(3+)、Ho~(3+)的Gd_2O_2S中观察到红色和橙色长余辉发光； 4首次采用微波法合成了Gd_2O_2S：Sm~(3+)，Mg，Ti磷光粉，该磷光粉经紫外或可见光激发后呈现明显的橙红色长余辉发光； 5在YOX中同时观察到Eu~(2+)和Eu~(3+)的发射，系统研究了基质、添加剂及反应气氛对Eu价态和发光的影响。

The colors of barrel plating are :triatomic chromiumblue/white/colorful/black zinc, chromium with a valence of sixblue/white/colorful/black zinc, pure copper, bright nickel, chemical nickel ,black nickel ,bronze, chromium and so on; the colors of the rack plating are : triatomic chromiumblue/white/colorful/black zinc, chromium with a valence of sixblue/white/colorful/black zinc, pure copper, bright nickel, chemical nickel ,black nickel ,bronze, chromium and so on.

随着市场发展需要，公司电镀生产线迁入博罗县石湾镇，投资设立金城五金电镀厂，总面积 9000平方米，专业加工电镀各种螺丝、五金件，设备齐全，实力雄厚，滚镀的颜色有：三价铬兰/白/彩/黑锌、六价铬兰/白/彩/黑锌、红铜、亮镍、化学镍、枪黑镍、青铜、青古铜、铬等不同颜色，挂镀的颜色有：三价铬兰/白/彩/黑锌、六价铬兰/白/彩/黑锌、红铜、亮镍、化学镍、枪黑镍、青铜、青古铜、铬等颜色，镀种齐全，月生产能力可达 800 余吨。

Inhibition efficiency of these inh ibitors decrease with the increase of free valence of N atom; Otherwise inhibiti on efficiency increase with the increase of summation of free valence in pyridin e ring .

这些缓蚀剂随着N原子自由价的增大，缓蚀效率降低；而随着吡啶环自由价之和的增加，缓蚀效率提高。

When examining the relative positions of the valence band and the conduction bands in Table 2, it is evident that it is in fact thermodynamically feasible for the generated electrons in titanium dioxide to be transferred to the lower lying conduction band of any the iron oxides phases present, while the photogenerated holes may also be transferred to the upper lying valence bands of the iron oxides.

当检查原子价的比较位置的时候表 2 的乐团和传导乐团，它是显然的那它事实上热力学能实行对钛二氧化物的被产生的电子被转移对比较低的横躺传导乐团任何的那氧化铁时期呈现，当 photogenerated的时候洞也可能被转移到上面的横躺原子价氧化铁的乐团。

One is low valence vanadium oxide thin films were deposited by direct current facing target magnetron sputtering firstly, and then thermal oxidated; the other is high valence vanadium oxide thin films were deposited by ion beam sputtering, then thermal deoxidated. Vanadium oxide thin films with phase transition were obtained at the lower thermal process temperature 300℃, which is compatible with MEMS technologys. The composition of VO_x thin film fabricated by first method includes mainly VO_2, V2O3 and VO_, the TCR is -2.25%/K, the TCR gradually increases with phase transition temperature decreases. The composition of VO_x thin film fabricated by the second method includes mainly VO_2, V2O5 and V2O3 , and the resulting VO_x thin filmTCR is -3.0%/K. The TCR of phase transition vanadium oxide thin films made by second method is higher than that made by first method for the existance of V2O5 in thin films.

分别采用直流对靶磁控溅射制备低价态氧化钒薄膜再附加热氧化处理的方式，和射频离子束溅射制备高价氧化钒薄膜附加热还原处理的方式获得了具有相变特性的氧化钒薄膜，第一种方式获得相变特性氧化钒薄膜的热处理温度最低为300℃，克服了以往高温条件下热处理不能与MEMS工艺兼容的缺点；相变特性氧化钒薄膜的组分以VO_2为主，含有V2O3和VO_，室温TCR为-2.25%/K；室温电阻温度系数随相变温度的降低逐渐升高；采用第二种方式获得的相变氧化钒薄膜的组分以VO_2为主，含有V2O5和V2O3，室温TCR可达-3.0%/K；分析发现，具有相变特性的氧化钒薄膜中含有V2O5时，室温电阻温度系数明显增大。

Using the valence electron orbit energy E(subscript i and number of valence electron shell n(subscript i, a new connectivity topological index (superscript mE was proposed from δ.

利用价电子轨道能量E和价电子层数n，构建了新的原子点价δ，由点价δ构建价电子轨道能量拓扑指数E。

High temperature is favorable to the formation of low valence state-As minerals and to the addition of As into pyrite crystal lattice, thus is favorable for the formation of P type of pyrite. However, at low temperature, high valence As minerals are easily formed and this case is not suitable for As to add into the pyrite crystal lattice to substitute S, thus the low temperature is beneficial to the formation of N type of pyrite.

As在白然界中的赋存状态与温度的关系表明：高温有利于形成低价态的As矿物，也有利于As呈低价态进入黄铁矿晶格中替代S而形成P型导电；低温则有利于形成高价态As的独立矿物，不利于As呈低价态进入黄铁矿晶格中替代S。，因而有利于形成N型导电。

The ability of carbon to form stable compounds in such astonishing numbers arises in that it utilizes its four valence electrons completely in the establishment of four covalence,its valence shell becomes saturated.

碳原子能够利用其全部四个价电子构成共价键，并形成稳定的饱和价电子层。这就导致碳元素能构成各类数目惊人的稳定化合物。注意本句使用的是&逆序&的翻译方法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。