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hollow
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  空心
    shell thickness of the hollow titania microspheres increased from 20-25 nm to 45-50 nm with increasing the volume ratios of titanium tetrabutoxide to ethanol from 1:20 to 1:10. The void sizes of these hollow microspheres were determined and 15%-20 % smaller than the diameters of the polystyrene template.
    实验发现:当钛酸四丁酯与乙醇的体积比从1:20提高到1:10时,二氧化钛空心微球的球壳厚度从20-25nm增加到45-50nm; 以不同粒径的聚苯乙烯粒子作模板,可以得到不同内孔直径的二氧化钛空心微球,其内孔直径比聚苯乙烯模板直径小15%-20%.
    TEM observations showed that the as-obtained CdS hollow spheres have uniform size and diameters of 340 nm, 450 nm and 800 nm, respectively.
    透射电镜分析结果表明,以直径250.340和600nm的PSA乳胶粒为模板,所得CdS空心球的粒径均匀,直径分别为340、450和800nm。
    The products were characterized by XRD, FESEM and TEM. It was found that the mesoporous hollow spheres were of the sizes of 200-500 nm and the shell thickness of about 50-100 nm with disordered wormhole framework, the mesoporous solid spheres were of the sizes of 200 -300nm.
    FESEM以及TEM观察表明二氧化钛空心球的直径为200-500 nm,其壁厚约为50-100 nm; 二氧化钛实心球的直径大约为200-300 nm.
    Hollow sphere reinforced 6061 Al matrix composites, with porosity of 50% , were fabricated by squeeze-casting technology.
    本文选用空心球体与6061Al合金,采用挤压铸造法制备了孔隙率为50%的6061Al基微孔复合材料。
    The 70vol% hollow ceramic particle/6061Al composites have been fabricated by squeeze casting technology and the damping capacity of the composites were investigated by bending-vibration method.
    采用挤压铸造法制备了70%(体积分教)空心陶瓷/6061Al复合材料,采用弯曲共振法测试了复合材料的阻尼性能。
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  中空
    Study on Synthesis of Inorganic/Organic Nanocomposite Materials and Hollow Materials
    无机/有机纳米复合材料及中空材料的合成研究
短句来源
    Studies on the Controlled Growth and Mechanism of Hollow/Porous ZnO Nanostructures
    中空/多孔氧化锌纳米结构的形态控制及其机理研究
短句来源
    Study of Poly(Phthalazinone Ether Sulfone Ketone)(PPESK) Hollow Fiber Ultrafiltration and Nanofiltration Membranes
    PPESK中空纤维超滤膜、纳滤膜的研究
短句来源
    The result showed that the temperature of oil less than 80℃, content of surfactant between 1%-15% and curing temperature of phenolic resin higher than 80℃ will be favored for phenolic resin to form and keep the hollow spherical shape.
    实验结果表明,油相温度不高于80℃、乳化剂浓度介于1%-15%之间、酚醛树脂固化温度高于80℃均有利于酚醛树脂形成并维持中空的微球形状。
    Research on kapok/3D crimp hollow polyester composition buoyancy materials
    木棉/三维卷曲中空涤纶复合浮力材料的探讨
短句来源
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  中空的
    The result showed that the temperature of oil less than 80℃, content of surfactant between 1%-15% and curing temperature of phenolic resin higher than 80℃ will be favored for phenolic resin to form and keep the hollow spherical shape.
    实验结果表明,油相温度不高于80℃、乳化剂浓度介于1%-15%之间、酚醛树脂固化温度高于80℃均有利于酚醛树脂形成并维持中空的微球形状。
    TiO_2 layers compart the bamboo-shaped nanotubes, transect the hollow regions at intervals ranged from 80 to 300 nm.
    竹节状纳米管是由TiO_2层分隔而成的,间隔为80~300nm的许多中空的空间格组成。
短句来源
    The results indicate that CNTs grown using CH4 and H2 as reaction gases are bent and hollow,with a large average diameter and a low.
    结果表明,用CH_4和H_2为反应气体制备的碳纳米管是弯曲和中空的,它们的直径较大,生长速率较低;
短句来源
    Cobalt acetate acting as catalyst precursor can yield high-purity (about 80%-90%) carbon nanotubes with good microstructures and hollow channels.
    以乙酸钴为前驱体可以得到纯度较高(约80%~90%)、微观结构较好的管腔中空的碳纳米管。
短句来源
    Particularly,a very good positive effect is observed on producing super light xonotlite secondary particles by using ZrOCl_2·8H_2O as an additive. The secondary particles have a hollow structure and large diameter. Subsequently ,very fine xonotlite fibers could also be produced by such a method.
    加入适当少量ZrOCl2·8H2O的添加剂后进一步可以获得结构中空的大直径超轻硬硅钙石二次粒子及良好的硬硅钙石纤维。
短句来源
  “hollow”译为未确定词的双语例句
    The Normalised Load for Hollow Cylinder with Inner Hoop Crack and Jet Nozzle with a Corner Crack
    含环向内裂纹圆筒和喷嘴角裂纹体的标准载荷
短句来源
    It shows the hollow cenospheres were integrated,well-proportioned in the aluminum matrix. The shielding effectiveness (SE) was comparative to that of the traditional material-permalloy 1J50. The value of SE for both materials was equal to 106dB when f=300kHz.
    电磁屏蔽性能测试表明,在0.3MHz-1.5GHz的频率范围内,材料的电磁屏蔽性能与传统的屏蔽材料1J50相仿,当f=300KHz时,两者的屏蔽效能均达到106dB。
    Preparation of Core-Shell Polystyrene/ Silica Composite Microspheres and Hollow Silica Spheres
    核-壳式聚苯乙烯/二氧化硅复合微球及空腔硅球的制备
短句来源
    Solving Wave Propagation along Axis Direction in Piezoelectric Hollow Cylinder by Integral Average Method
    用积分平均方法求解压电圆柱壳内波的轴向传播
短句来源
    The result indicates that it is possible to use high frequency electromagnetic field to prepare the solid stick and hollow column Al—Si and Al—Mg_2Si particle reinforced composite material, in which the primary Si and Mg_2Si present the gradient distribution along radius direction.
    试验结果表明:利用高频磁场的分离机理可以制备初晶Si及初生Mg_2Si颗粒沿径向呈梯度分布的棒状及管状Al基复合材料。
短句来源
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  hollow
High-resolution transmission electron microscopy observation indicates that the nanocapsules are hollow-structured with a wall thickness of about 6 nm.
      
New approaches to stimuli-responsive polymeric micelles and hollow spheres
      
This article briefly describes some new approaches to stimuli-sensitive polymeric micelles and hollow spheres, which were developed in the authors' laboratory in recent years.
      
This hollow structure shows perfect reversible size-pH dependence.
      
Hollow spheres of PNIPAM network were then obtained by biodegradation of the PCL core.
      
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We have developed two types of hollow superconducting NbTi composites, one of which is stranded, the other monolithic. The composites is discribed briefly in this paper fabricating process.

我们已经研制出两种型式的中空复合NbTi超导体,一种是绞缆型,另一种是整体型。本文简短地介绍了研制工艺。

The authors have established in this paper a“Wall-like Model”for the foam electric conductivity,which regards foam system as that of combinations of gaseous liquid elements with uniform hollow cubes arranged in shape of bricks.The“Wall- like Model Formula”can be expressed as K=D/(1.8) by means of mathematical deriva- tion,the result of which is very near to those of experiments when the blow ratio is between 5.5 to 11(including those of usually used in the techniques of foam resin finishing). In the experiments...

The authors have established in this paper a“Wall-like Model”for the foam electric conductivity,which regards foam system as that of combinations of gaseous liquid elements with uniform hollow cubes arranged in shape of bricks.The“Wall- like Model Formula”can be expressed as K=D/(1.8) by means of mathematical deriva- tion,the result of which is very near to those of experiments when the blow ratio is between 5.5 to 11(including those of usually used in the techniques of foam resin finishing). In the experiments of foam resin finishing,the related curves between the blow ratio (ρ_0)/[p] and the conductivity ratio (K_0)/K under different foaming methods,different temperatures and different formulations have been tested and determined by authors.

本文建立了泡沫电导率“墙式模型”,该模型将泡沫体系视为由大小均一的空心正立方体气液单元,以砖墙形式排列而成的聚集体系。经数学推导得到“墙式模型”表达式K=D/1.8,该结论在泡沫发泡倍率5.5—11之间(包含了泡沫树脂整理工艺常用的发泡倍率范围),对实验结果有较好的拟合程度。在泡沫树脂整理实验范围内,测定了不同发泡方式、不同温度、不同处方下的泡沫发泡倍率ρ_0/[ρ]对电导率比k_0/k的关系曲线。

It is widely recognized that the weight of a structural component is inversely proportional to the specific strength or the specific stiffness of the material selected and that these properties of materials are the most important parameters to be considered in material s selection.The relation between a structural weight and strength or modulus of elasticity of materials under the conditions of a plate under tension, bending of a beam, a column subjected to compression and a hollow cylinder under internal...

It is widely recognized that the weight of a structural component is inversely proportional to the specific strength or the specific stiffness of the material selected and that these properties of materials are the most important parameters to be considered in material s selection.The relation between a structural weight and strength or modulus of elasticity of materials under the conditions of a plate under tension, bending of a beam, a column subjected to compression and a hollow cylinder under internal pressure are analysed and appropriate expressions for effective specific strength and effective specific stiffness are obtained. In general, these two parameters are given as σx/ρ or Ey/ρ (x, y≤l) respectively, and are recommended as criteria for optimizing materials selection, in place of the specific strength σ/ρ and specific stiffness E/ρ applied commonly. Based on these expressions, it seems more effective to decrease the density of a material rather than to raise its strength or modulus of elasticity if weight is the critical problem for a design. From this point of view, it may be said that the history of developing aerospace materials is also the history of successively decreasing the densities of materials.

通常结构件的重量与所用材料的比强度或比刚度成反比,因此比强度、比刚度就成为材料选择的主要参数。本文分析了板材、型材在拉伸、弯曲作用下以及受压杆件、内压圆筒件的构件重量和材料强度、弹性模量之间的关系,求得合理的有效比强度、有效比刚度的表达式。根据计算,这两个参数可以分别表示为o~x/ρ或E~y/ρ(x,y≤1)。作者建议采用这两个参数代替常用的o/ρ和E/p,作为优化材料选择的准则。 基于以上表达式,对于重量成为设计的严重问题来说,降低材料的密度比提高材料的强度或弹性模量更为有效。从这个意义上说,宇航材料的发展史也就是材料密度不断降低的历史。

 
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