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closest packing
相关语句
  最紧密堆积
     ON THE RELATION BETWEEN THE STRUCTURES OF CLOSEST PACKING OF OXYGEN ANIONS AND THE MEAN REFRACTIVE INDICES OF MINERALS
     氧离子的最紧密堆积构造与矿物的平均折光率之关系
短句来源
     According to the principle of closest packing of oxygen and the principle of cations filling tetrahedral and octahedral cavities and based on the types of closest packing structure of simple oxides such as chrysoberyl, spinel and nolanite, this paper discusses in detail the crystal structure constructing principle of the closest packing structure types of complex oxide minerals such as pengzhizhongite, nigerite, taaffeite, hogbomite, etc.
     从氧原子最紧密堆积以及阳离子充填四面体和八面体空隙原理出发 ,以简单氧化物矿物最紧密堆积结构类型金绿宝石、尖晶石、铁钒矿为基础 ,深入讨论了复杂氧化物矿物最紧密堆积结构类型彭志忠石、尼日利亚石、塔菲石、黑铝镁铁 (钛 )矿等晶体结构构筑原理。
短句来源
  “closest packing”译为未确定词的双语例句
     The closest packing crystal plane of SiC crystal is the lowest energy interface in SiC and molten aluminum.
     对复合材料中界面本征结构的研究表明,SiC晶体中的最密排面与铝熔体之间具有最低的界面能。
短句来源
     The Construction of Crystal Structure Models Based on Closest Packing of Equal Diameter Sphere and Their Uses
     以等径园球密堆积为基础的晶体结构模型的制作与使用
短句来源
     The Fe1-xO-based catalyst for ammonia synthesis was invented by professor Liuhuazhang in 1986, which has many advantage such as high activity and easy reduce etc. We all know that the Wustite structure is non-stoichiometric ferrous oxide, and there are tetrahedron and octahedron interspace formed by oxygen anion cubic closest packing.
     合成氨用Fe_(1-x)O基催化剂具有活性高、易还原等优点,而其结构上的非整比性、晶格的缺位及其氧离子密堆积的立方体中四面体和八面体空隙为掺杂改性提供了有利的结构条件。
短句来源
     Wustite (Fe_(1-x)O) is a classical example of non-stoichiometric oxides. Which is mainly applied to catalyst for ammonia synthesis in industry. There are tetrahedron and octahedron interspace formed by oxygen anion cubic closest packing.
     维氏体(Fe_(1-x)O)是典型的非整比氧化物,在工业上主要应用于合成氨催化剂,其结构上的非整比性、晶格的缺位及其氧离子密堆积的立方体中四面体和八面体空隙为掺杂改性提供了有利的结构条件,维氏体在热力学上属于亚稳相,在570℃以下,发生歧化反应而生成Fe和Fe_3O_4。
短句来源
     The stage interface came from partial area of SiC particulate and one of the facets was always the closest packing crystal plane(0001).
     台阶界面产生于SiC颗粒上的局部区域。 台阶上两个相交的小平面,其中之一是六方SiC晶体中的(0001)最密排面。
短句来源
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  相似匹配句对
     sterilization and packing.
     灭菌、包装。
短句来源
     Packing in Digraph
     有向图的满装
短句来源
     ON THE RELATION BETWEEN THE STRUCTURES OF CLOSEST PACKING OF OXYGEN ANIONS AND THE MEAN REFRACTIVE INDICES OF MINERALS
     氧离子的最紧密堆积构造与矿物的平均折光率之关系
短句来源
     The Construction of Crystal Structure Models Based on Closest Packing of Equal Diameter Sphere and Their Uses
     以等径园球密堆积为基础的晶体结构模型的制作与使用
短句来源
     The Chinese Closest to F1
     冲向F1
短句来源
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  closest packing
Consideration of the martensitic nucleation process as a sequence of steps which take the particle from maximum to minimum coherency leads to the hypothesis that the first step in martensitic nucleation is faulting on planes of closest packing.
      
Consideration of the martensitic nucleation process as a sequence of steps which take the particle from maximum to minimum coherency leads to the hypothesis that the first step in martensitic nucleation is faulting on planes of closest packing.
      
Closest packing of self-protecting singlets is found to occur around critical doping; closest packing of paired self-protecting singlets around optimum doping.
      
High densities are achieved due to regions of the closest packing (η = 0.74) emerging in the models.
      
The structure of the cesium salt is ionic with interstitial H2O molecules and double-layer closest packing of anions.
      
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The structure of Zn(IO_3)_2 crystal has been determined by means of Ⅹ-ray powder diffraction method.It belongs to monoclinic system.The space group is P112_1.Lattice constants are: α=5.469A,b=2α=10.938A,c=5.1158A,γ=120°.The density is equal to 5.08g/cm~3.There are two formula units per unit cell.18 atoms in a unit cell are situated at the 9 sets 2(a) positions respectively.Their atomic parameters are: The crystal structure of Zn(IO_3)_2 consists of IO_3~- triangular pyramidals and slightly distorted ZnO_6 octahedrons.The...

The structure of Zn(IO_3)_2 crystal has been determined by means of Ⅹ-ray powder diffraction method.It belongs to monoclinic system.The space group is P112_1.Lattice constants are: α=5.469A,b=2α=10.938A,c=5.1158A,γ=120°.The density is equal to 5.08g/cm~3.There are two formula units per unit cell.18 atoms in a unit cell are situated at the 9 sets 2(a) positions respectively.Their atomic parameters are: The crystal structure of Zn(IO_3)_2 consists of IO_3~- triangular pyramidals and slightly distorted ZnO_6 octahedrons.The average length of three short bonds in two independent IO_3~- is 1.81A with average bond angle about 98.4°.The iodate ions form a nearly regular hexagonal closest-packed array,with iodine atoms at z=0 and 1/2.The resulting distorted octahedral interstices are occupied by zine ions which lie out of the iodine planes.All O→I vectors in IO_3~- have a component directed antiparallel to the c lattice vector. The mutual relation between the structures of α-LiIO_3,Mg(IO_3)_2,LiIO_3-Mg (IO_3)_2 solid solution,Zn(IO_3)_2 and α-Cu(IO_3)_2 crystals has also been discussed

本文用X射线粉末衍射方法测定了Zn(IO_3)_2的晶体结构。Zn(IO_3)_2属单斜晶系,空间群为P112_1,点阵常数为:a=5.469A,b=2a=10.938A,c=5.1158A,γ=120°。单胞体积v=265.027A~3,ρ为5.08g/cm_3。每单胞含2个化合式单位,18个原子分别占据九组2(a)等效位置。测定了原子参数。 Zn(IO_3)_2晶体由IO_3~-三角锥体和略带畸变的ZnO_6八面体组成。IO_3~-中的I-O平均键长1.81A,键角98.4°,形成近似六角密排列,I~v分布在z=O和z=(1/2)的平面。Zn~(2+)略偏离I~v原子的平面,IO_3~-的所有O→I矢量都具有与c点阵矢量反平行的分量。本文讨论了极性晶体α-LiIO_3,Mg(IO_3)_2,Zn(IO_3)_2,LiIO_3-Mg(IO_3)_2,α-Cu(IO_3)_2晶体结构之间的相互关系。

Lindsleyite and mathiasite occur in kimberlites in Shangdong Province. Theirspace group is R3 with cell parameters a=0.9133nm, a=69.14°and a=0.9119nm,a= 69.18°respectively. Their formulae, determined by microprobe analysis, areBa_(0.58)K_(0.11)Sr_(0.16)Ca_(0.12)Ce_(0.01)La_(0.16)Ti_(11.8)Cr_(4.00)Fe_(2.19)~(3+)Mg_(1.65)Nb_(0.27)Zr_(0.63)V_(0.15)Al_(0.09)Si_(0.05)O_(38)andK_(0.47)Ba_(0.36)Sr_(0.13)Ca_(0.12)Ce_(0.12)Ti_(12.10)Fe_(2.06)~(2+)Mg_(1.71)Zr_(0.72)Cr_(3.96)Al_(0.17)O_(38) respectively. For lind-sleyite...

Lindsleyite and mathiasite occur in kimberlites in Shangdong Province. Theirspace group is R3 with cell parameters a=0.9133nm, a=69.14°and a=0.9119nm,a= 69.18°respectively. Their formulae, determined by microprobe analysis, areBa_(0.58)K_(0.11)Sr_(0.16)Ca_(0.12)Ce_(0.01)La_(0.16)Ti_(11.8)Cr_(4.00)Fe_(2.19)~(3+)Mg_(1.65)Nb_(0.27)Zr_(0.63)V_(0.15)Al_(0.09)Si_(0.05)O_(38)andK_(0.47)Ba_(0.36)Sr_(0.13)Ca_(0.12)Ce_(0.12)Ti_(12.10)Fe_(2.06)~(2+)Mg_(1.71)Zr_(0.72)Cr_(3.96)Al_(0.17)O_(38) respectively. For lind-sleyite and mathiasite, the structures were solved by using 1659 and 1559 date ofdiffraction, refined to the R values of 0.088 and 0.056, respectively. Lindsleyite andmathiaslte are isostructural with clichtonite, with a structure characterized by anine-layer(hhc——) oxygen closest packing in which the large cations such as Baand K occupy an anion site in a rhombohedral unit cell and the remaining smallcations fill the voids of 19 octahedrons and 2 tetrahedzons. A comparison is madeof the site occupancies and average bond lengths for seven crichtonite-group min-erals. The unit-cell edge, a_(rh), is associated with the M (1)-O bond length and largecation radius. The sizes of M(4)O_6 and M(5)O_6 are affected by the average bondlengths of M (1)-O, M (2)-O and M (3)-O.Finally the crystal structure and crys-tal chemistry of the crichtonite-group mineral are discussed.

本文通过结构的测定和修正。确定了各阳离子特别是Zr_+~4在钛钡铬石、钛钾铬石(蒙山矿)中的结晶学位置,证实了这两个矿物是锶铁钛矿族的分别以大阳离子Ba和K为主的两种新矿物。通过与锶铁钛矿族其他矿物的晶体结构和晶体化学特征进行对比,探讨了这两个矿物中M(4)-O M(5)O平均键长较同族其他矿物的偏大的原因,以及该族矿物晶胞的实际形态与理想形态(据最紧密堆积原理推测的)相比在堆积层内有些伸长而在堆积方向则有些收缩的原因。由于结构中较独立的M(0),M(1),M(2)配位位置的存在,故使具有共同结构特征的锶铁钛矿族矿物种类繁多,且化学成分复杂。

The densities of the mixtures of N,N-Dimethylformamide (DMF) and water(w)have been measured at ten temperatures from 278. 15K to 318. 15K with the vibra-tingtube density meter(Anton Paar Model DMA602). Then the excess molal volumes V~Eof solutions and apparent and partial molal volumes of DMF over the range of molefraction 0-1 have been determined. Comparing these quantities as functions of molefraction of mixtures with the standard entropies of transfer for NaCl from water toDMF-H_2O mixtures as function of...

The densities of the mixtures of N,N-Dimethylformamide (DMF) and water(w)have been measured at ten temperatures from 278. 15K to 318. 15K with the vibra-tingtube density meter(Anton Paar Model DMA602). Then the excess molal volumes V~Eof solutions and apparent and partial molal volumes of DMF over the range of molefraction 0-1 have been determined. Comparing these quantities as functions of molefraction of mixtures with the standard entropies of transfer for NaCl from water toDMF-H_2O mixtures as function of mole fraction of mixed solvent we found out thereis a correspondence between the V_(DMF) varied with x and the standard entropies oftransfer of NaCl. Both have the extremes at x=0. 075. Therefore the structure of so-lution have been discussed. It might be considered that monomeric DMF moleculeshave been trapped in a quasi-clathrate "cage" made up of 12 water molecules at x=0.075 forming the possible closest packing of particles.

本文应用振动管式密度计,测定了278.15—318.15K范围内10个温度下,DMF-H_2溶液的密度随组成的变化.根据密度值求出溶液的超额体积VE;在全部浓度的范围内不同组成下DMF的表观摩尔体积φv及偏摩尔体积V_(DMF);及VE、φv和V_(DMF)随组成变化的规律.发现V_(DMF)随x_(DMF)的变化与NaCl由水至DMF-H_2O溶液的转移熵有对应的变化规律,均在x_(DMF)≈0.075处有极值,从而进一步对DMF-H_2O的液体结构进行了讨论,认为当x_(DMF)=0.075时,单个DMF分子可能嵌入12个水分子组成的分子笼中,从而形成最紧密结构。

 
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