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low wave number
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  低波数
     The results show that for 1D problem,the computational accuracy can reach magnitude of 10~(-7) for low wave number,and reach magnitude of 10~(-5) for high wave number.
     结果表明,对1D问题,低波数的精度达10-7量级,高波数的精度达10-5量级;
短句来源
     And the emerging hydrogen bond between -OH, -NH2 of MTGase and oxygen carbonyl of AOT induce electric dipole moment augmention so infrared absorption shifte to low wave number,i. e. 1136 cm-1 to 1127 cm-1 , 1113 cm-1 to 1105 cm-1.Chitosan-gelatin copolymer was synthesized by primary purified MTGase using elatin and chitosan.
     MTGase分子表面的-OH、-NH2等氢键供体与AOT非极性侧链上的羰基氧形成氢键,电偶极矩增大,致使其1138 cm-1红外吸收峰向低波数位移至1127 cm-1,1113 cm-1移至1105 cm-1,且吸收强度明显降低。
短句来源
     When using 782 nm laser source, there is no difference except for 1 601 cm -1. There are a lot of weakened lines and lines shifting about 4-10 cm -1 toward low wave number.
     发现对 782nm激发光源 ,除 16 0 1cm-1谱线强度减小外 ,其他无明显变化 ; 而对 5 14nm激发光源 :一是有许多条谱线强度减小 ,二是许多条谱线向低波数移动了 4~ 10cm-1波数左右。
短句来源
     But the intensity of lines of low wave number is strong and clear when excited by 782 nm laser source.
     低波数段 (小于 135 0cm-1) ,对应 782nm激发光源的拉曼谱线强而明显。
短句来源
     The BET surface areas of as-made Naβ samples decrease as the Si/Al ratio increase,and BET surface areas of Cu(I) β,Ag(I) β sorbents decrease comparing with the same Si/Al ratio Na β zeolite. FT-IR spectra of the samples show that the peak of framework vibration moves to low wave number as Cu(I),Ag(I) were inserted.
     Cu(I)、Ag(I)离子的引入使样品的红外骨架振动峰向低波数移动,与相同硅铝比的Naβ沸石相比,吸附剂的BET比表面积有所降低。
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  “low wave number”译为未确定词的双语例句
     The calculation of vibration frequencies shows that the vibration frequency of NO shifts towards low wave number about 50 cm-1 after adsorption.
     振动频率计算表明,NO吸附后NO振动频率红移约50cm-1。
短句来源
  相似匹配句对
     Low and N.
     Low和N .
短句来源
     Low-Noise Millimeter Wave Receivers
     低噪声毫米波接收机
短句来源
     PROPAGATION LAWS OF RADIATION WAVE IN THE LOW Z MATERIAL
     辐射波在低Z介质中的传播规律
短句来源
     dinger wave).
     dinger 孤立波)的形成。
短句来源
     Wave propagation
     波的传播
短句来源
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  low wave number
Raman measurement showed characteristic peaks of β-C3N4 in the low wave number region.
      
However, the internal solitons change the power exponent of the power spectra drastically, especially in the low wave number domain; they also break down the power law of the structure function and increase the intermittency parameter.
      
This phenomenon is shown to be intimately related to the possible existence of negative group velocity at low wave number, i.e.
      
While the anisotropy at small scale changes appreciably, there is no discernable change at the large scale when distance from the wall is increased as reflected in the collapses of spectra shear correlation coefficient at the low wave number.
      
The results indicate that, while the energy containing motion is shifted from low wave number to high wave number near the wall due to the interfering of the roughness strip with the near-wall structure, the reverse is the case in the outer region.
      
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Comparing the infrared absorption spectra of the typical crystals of albite, orthoclase,nepheline of 4-coordinated Al~(3+) ions and spodumene, kyanite, beryl of 6-coordinated Al~(3+) ions with that of R_2O-Al_2O_3-SiO_2 system glasses, it has been found that in the glasses theAl~(3+) ions are 4-coordinated when R_2O/Al_2O_3>>1. But it is different in Li_2O-Al_2O_3-SiO_2glasses that the coordination number of part of Al~(3+) ions may be 6. No anomaly related to the presence of mixed alkali was found on...

Comparing the infrared absorption spectra of the typical crystals of albite, orthoclase,nepheline of 4-coordinated Al~(3+) ions and spodumene, kyanite, beryl of 6-coordinated Al~(3+) ions with that of R_2O-Al_2O_3-SiO_2 system glasses, it has been found that in the glasses theAl~(3+) ions are 4-coordinated when R_2O/Al_2O_3>>1. But it is different in Li_2O-Al_2O_3-SiO_2glasses that the coordination number of part of Al~(3+) ions may be 6. No anomaly related to the presence of mixed alkali was found on the infrared andultra-violet absorption spectra for a series of alumino-silicate glasses. The principal peak at ca1000 cm~(-1) moves to lower wave numbers as the radii of network modifying ions are increas-ed. R_2O-Al_2O_3-SiO_2 system glasses have higher transmittance than R_2O-CaO-SiO_2 systemglasses in the ultraviolet region (330-350μm). Experimental data of the physico-chemicalproperties of R_2O-Al_2O_3-SiO_2 glasses showed that, in the presence of mixed alkali, someproperties (viscosity at low temperatures, coefficient of thermal expansion, water durabili-ty, etc.) gave out the mixed alkali effect, but for another properties (microhardness,acid or alkali durability, etc.) the mixed alkali effect would be inexplicit. According to the infrared absorption spectra, the structure model of R_2O-Al_2O_3-SiO_2was discussed. We have pointed out that, in order to obtain industrial alumino-silicateglasses with satisfactory stability, it is necessary to combine the eutectic compositions withstructural considerations, that is to say, the glasses must have the atomic groupmentof type R~+X·4Y(R~+=Na~+ or K~+, X=[AlO_4], Y=[SiO_4]). On account of lowering the meltingtemperature in production, the addition of certain excess quantity of Na_2O will be need-ed. Besides, the addition of K_2O or Li_2O will produce mixed alkali effect to improve theproperties of glass. The design of the glasses on the base of R_2O-Al_2O_3-SiO_2 have beendiscussed.

通过对具有[AlO_4]的钾长石、钠长石、霞石与具有[AlO_6]的锂辉石、兰晶石、绿柱石的典型晶体的红外光谱和R_2O-Al_2O_3-SiO_2系统玻璃的红外光谱对比,可以认为当R_2O/Al_2O_3≥1时,玻璃中的Al~(3+)处于[AlO_4]状态。而Li_2O-Al_2O_3-SiO_2系统玻璃的情况则有所不同,部分Al~(3+)可能处于[AlO_6]。实践表明:在红外光谱,紫外至近红外吸收光谱上,双碱铝硅酸盐玻璃并不表现出异常现象,但在1000厘米~(-1)波数左右的吸收带受到网络间隙离子半径大小的影响而有所位移。同分子组成的R_2O-Al_2O_3-SiO_2系统玻璃与Na_2O-CaO-SiO_2系统玻璃相比,在紫外波段(333~350毫微米)具有较高的透射率。对R_2O-Al_2O_3-SiO_2系统玻璃物理-化学性质的测定表明,一些性质(如低温粘度、热膨胀系数、抗水性等)显示出明显的双碱效应,而另一些性质(如显微硬度、抗酸性等)则并不明显。根据对红外光谱的研究,文中讨论了R_2O-Al_2O_3-SiO_2系统玻璃的结构模型。认为从结构的观点与相图中的低共熔点组成相结合,为使R_2O-A...

通过对具有[AlO_4]的钾长石、钠长石、霞石与具有[AlO_6]的锂辉石、兰晶石、绿柱石的典型晶体的红外光谱和R_2O-Al_2O_3-SiO_2系统玻璃的红外光谱对比,可以认为当R_2O/Al_2O_3≥1时,玻璃中的Al~(3+)处于[AlO_4]状态。而Li_2O-Al_2O_3-SiO_2系统玻璃的情况则有所不同,部分Al~(3+)可能处于[AlO_6]。实践表明:在红外光谱,紫外至近红外吸收光谱上,双碱铝硅酸盐玻璃并不表现出异常现象,但在1000厘米~(-1)波数左右的吸收带受到网络间隙离子半径大小的影响而有所位移。同分子组成的R_2O-Al_2O_3-SiO_2系统玻璃与Na_2O-CaO-SiO_2系统玻璃相比,在紫外波段(333~350毫微米)具有较高的透射率。对R_2O-Al_2O_3-SiO_2系统玻璃物理-化学性质的测定表明,一些性质(如低温粘度、热膨胀系数、抗水性等)显示出明显的双碱效应,而另一些性质(如显微硬度、抗酸性等)则并不明显。根据对红外光谱的研究,文中讨论了R_2O-Al_2O_3-SiO_2系统玻璃的结构模型。认为从结构的观点与相图中的低共熔点组成相结合,为使R_2O-Al_2O_3-SiO_2系统玻璃具有良好的稳定性质,玻璃应拥有R~+X·4Y(R~+:Na~+或K~+,X:[AlO_4 ],Y:[SiO_4])原子团结构型。在工业生产中玻璃的熔制温度必须较低,因而还应加入一定过量的Na_2O。此外,引入K_2O或Li_2O还可产生?

Pt/Al2O3 catalysts of different dispersion with adsorbed CO have been studied by infrared spectroscopy. A remarkable effect of particle size on the absorption band of linear CO was observed both in the presence or absence of co-adsorbed water. For catalysts of higher dispersion, only a single absorption band of linear CO emerged with its peak position at lower wave number, which was further shifted to the red side by co-adsorbed water. The red shift(v=40cm-1) results from the co-adsorbed water is much higher...

Pt/Al2O3 catalysts of different dispersion with adsorbed CO have been studied by infrared spectroscopy. A remarkable effect of particle size on the absorption band of linear CO was observed both in the presence or absence of co-adsorbed water. For catalysts of higher dispersion, only a single absorption band of linear CO emerged with its peak position at lower wave number, which was further shifted to the red side by co-adsorbed water. The red shift(v=40cm-1) results from the co-adsorbed water is much higher than that (v-15cm-1) reported in literature.?In the case of catalysts of lower dispersion, the co-adsorbed water splitted up clearly the absorption band of linear CO into two bands, a nonshifted band at high wave number and a shifted one at low wave number. But such effect is not observed in the case of Pt/SiO2 catalysts. A H-bonding model for explanation of the profound effect of co-adsorbed water on the absorption band of linear CO is proposed, it is suggested that in addition to the d-n back-donating bond between Pt site and adsorbed species of CO, a hydrogen bond between the adsorbed CO on Pt and the co - adsorbed water on alumina will be operative on Pt/Al2O3 catalysts.

利用红外光谱方法考察了在Pt/Al_2O_3催化剂上Pt晶粒大小和共吸附H_2O对CO吸附态的影响。共吸附H_2O可使CO在Pt/Al_2O_3上的线式吸收带产生远大于文献报道过的红移(△vco=40厘米~(-1) ),谱带宽化和强度增加,而在Pt/SiO_2催化剂上则没有发现类似的效应。还发现CO的吸收带位置因Pt粒子大小不同而异,当D_(pt)足够大时,在共吸附H_2O的作用下,CO在Pt/Al_2O_3上的线式吸收带分裂成双峰,其中高波数峰对H_2O的作用不敏感,低波数峰对H_2O的作用敏感。提出了Al_2O_3表面羟基可以和CO吸附态之间形成氢键的观点,可用以解释在Al_2O_3上高分散的Pt上和纯Pt金属表面上CO吸附态的不同特征。

The adsorbed surface species resulting from methanol decomposition on Ni-K/Al_2O_3 catalysts in the temperature range from room temperature to 300℃ were studied by infrared spectroscopy. Four different ty pes of surface species:(1) physically adsorbed methanol which can be removed by evacuation, (2) methoxide, (3) adsorbed carbon monoxide and (4) formate can be found on Ni/Al_2O_3.Besides these surface species, a stably adsorbed carbon monoxide species appear in the lower wave number region, surface bicarbonate...

The adsorbed surface species resulting from methanol decomposition on Ni-K/Al_2O_3 catalysts in the temperature range from room temperature to 300℃ were studied by infrared spectroscopy. Four different ty pes of surface species:(1) physically adsorbed methanol which can be removed by evacuation, (2) methoxide, (3) adsorbed carbon monoxide and (4) formate can be found on Ni/Al_2O_3.Besides these surface species, a stably adsorbed carbon monoxide species appear in the lower wave number region, surface bicarbonate and bidentate carbonate are observed on Ni-K/Al_2O_3. The stability and quantity of the surface species formed have close relation to the amount of potassium and temperature. In addition, the surface reactions occured on Ni-K/Al_2O_3 in methanol decomposition are discussed, and it is concluded that the surface methoxide is intermediate for methanol decomposition.

用红外光谱技术研究了室温至300℃时甲醇在Ni-K/Al_2O_3系催化剂上分解形成的吸附态。在Ni/Al_2O_3上形成了物理吸附甲醇、表面甲氧基、吸附一氧化碳和表面甲酸盐。除此以外,在Ni-K/Al_2O_3上还形成了一个稳定的一氧化碳吸附构型及表面碳酸氢盐和=配位碳酸盐。各种表面生成物的稳定性和生成量与催化剂中1K含量及温度之间的关系密切。另外,讨论了甲醇分解时在Ni-K/Al_2O_3系催化剂表面上发生的反应,确认甲醇分解的中间反应产物是表面甲氧基。

 
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