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石英     
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  quartz
    STUDIES CONDUCTED DURING 1960-61 ON THE INCREASE OF NEUTRON DIFFRACTION INTENSITY IN VIBRATING QUARTZ PLATES
    1960—1961年观察到的压电振荡对石英单晶片进行中子衍射的影响
短句来源
    Development of a low noise 3.39μm He-Ne laser with quartz discharge tubes of separate sections
    石英分段放电管低噪声3.39微米氦-氖激光器的研制
短句来源
    The Frequency Dependence of the Attenuation of Longitudinal Ultrasonic Waves in Synthetic Quartz at 4.2K, 77K and 300K
    在4.2K、77K、300K温度下石英晶体中超声纵波衰减与频率的关系
短句来源
    Laser Effect on the Surface of Quartz
    石英表面的激光效应
短句来源
    ANALYSIS OF FREQUENCY SPECTRUM OF COUPLED T-TYPE WAVE IN AT-CUT QUARTZ VIBRATOR
    AT切型石英振子耦合T型波的频谱分析和能陷判据
短句来源
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  silica
    Analysis on additional a-o diffraction in fused silica a-o Q-switches
    熔石英材料声光Q开关中附加声光衍射现象的分析
短句来源
    1.08μm superradiation in Nd-doped silica fiber
    掺钕石英光纤中的1.08μm超辐射
短句来源
    Experiment on frequency up-conversion in Er_(3+) doped silica fibers
    掺E~(3+)石英光纤中频率上转换的实验研究
短句来源
    Resonance enhanced stimulated four-photon mixing in Er~(3+) doped silica fibers
    掺Er~(3+)石英光纤中的共振增强受激四光子混频
短句来源
    Influence of Er~(3+) and Yb~(3+)/Er~(3+) doping on SHG in silica fibers
    Er~(3+)和Yb~(3+)/Er~(3+)掺杂对石英光纤中倍频的影响
短句来源
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  fused quartz
    2.The optical transmission spectra of BaTiO3 thin films annealed at different temperatures on fused quartz substrates are measured.
    3.采用溶胶-凝胶技术在SiO2/Si(111)和熔石英衬底上制备了等价离子掺杂(Sr2+和Pb2+)的BaTiO3薄膜,并研究了不同掺杂比例对BaTiO3薄膜结构和性质的影响。
短句来源
    Ba_(0.95) Pb_(0.05)TiO_3(BPT)thin films were grown on (100)Si and fused quartz substrates by sol-gel process.
    采用溶胶-凝胶(Sol-Gel)技术在(100)Si及石英衬底上制备了Ba0.95Pb0.05TiO3(BPT)铁电薄膜。
短句来源
    Dispersion characteristics of fused quartz prism and its applications in solid-state lasers
    熔石英棱镜的色散特性和在固体激光器中的应用
短句来源
    The transmission characteristics of the radiation from a UV XeCl excimer lager through fused quartz fibers have been investigated.
    本文研究了紫外XeCl准分子激光(308nm)在石英光纤中的传输特性.
短句来源
    A fused quartz blazed grating of 1200 lines/mm with blazed angle 5°10' was fabricated by holograph-ion ham etching technique. The exposure, development and etch conditions for fabricating grating are inverstigated. The finished blazed grating is tested on a Seya-Namioka monochromator for photochemistry at National Synchrotron Radiation Laboratory.
    采用全息-离子束刻蚀微细加工技术在石英基板上成功地刻蚀出了1200线/mm、闪耀角5°10’的锯齿槽形闪耀光栅.对全息光刻、显影等掩模制作工艺和离子束刻蚀参数的控制等进行了讨论,还给出了在同步辐射光化学光束线上的测试结果.
短句来源
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  crystal quartz
    Ordinary refractive indices of crystal quartz at the laser wavelength λ=336.5578 μm is discriminated by measuring the phase difference with HCN laser interferometer.
    用HCN激光干涉仪,通过测量位相差的方法,简单地确认了激光波长为336.5578μm的石英晶体寻常光折射率n_0。
短句来源
    Wavelength tuning is realized from 810 to 890 nm continuously by a two plate crystal quartz birefringent filter (BRF).
    在腔内加入一石英双折射滤光片(BRF)作为调谐元件,波长可在810~890nm范围内连续可调。
短句来源

 

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  quartz
The PI solutions were micro-contact printed with the elastomeric PDMS replica on quartz slides.
      
Good surface-relief-grating structures were formed on the quartz slides.
      
The quartz slides covered with surface-relief-grating polymide (PI) films were then assembled into liquid crystal (LC) cells.
      
Diagnose Parameters of Plasma Induced by Femtosecond Laser Pulse in Quartz and Glasses
      
Electron plasma induced by a focused femtosecond pulse (130 fs, 800 nm) in quartz, fused silica, K9 glass, and Soda Lime glass was investigated by pump-probe technology.
      
更多          
  silica
Preparation and Evaluation of 3,5-Dinitrobenzoyl-Bonded Silica Gel Stationary Phase for HPLC
      
In this paper, a new preparation method of 3,5-dinitrobenzoyl-bonded silica gel stationary phase (DNB) for HPLC was developed by using N-(β-aminoethyl)-γ-aminopropyl-methyldimethoxy silane as coupling reagent.
      
The samples were extracted with methanol-water (volume ratio), The extracts were cleaned up with a column of silica gel.
      
Water-borne raspberry-like PMMA/SiO2 nanocom-posite particles were prepared via free radical copolymerization of methyl methacrylate (MMA) with 1-vinylimidazole (1-VID) in the presence of ultrafine aqueous silica sols.
      
The average particle sizes and the silica contents of the nanocomposite particles were in the ranges from 120-330 nm and 15%-20%, respectively.
      
更多          
  fused quartz
Adsorption isotherm of cationic polyelectrolyte, poly(styrene-co-dimethylaminopropylmaleimide), (molecular mass is 2 × 104) on the surface of fused quartz in aqueous 10-4 M KCl solution at pH 3 was measured by the method of capillary electrokinetics.
      
The Effect of Composition of Water-Ethanol Solutions on the Kinetics of Coagulation of Fused Quartz Suspensions
      
The effect of composition of water-ethanol solutions containing 0-96 vol % alcohol on the coagulation kinetics of dilute fused quartz suspensions is studied using flow ultramicroscopy technique.
      
Regularities of the Two-Layer Adsorption of Anionic Surfactant and Cationic Polyelectrolyte on the Fused Quartz Surface
      
Permittivities of Ftoroplast-4 fluoroplastic, fused quartz, single-crystal quartz, and other dielectrics measured in a frequency band of 10-70 GHz are presented.
      
更多          
  crystal quartz
Permittivities of Ftoroplast-4 fluoroplastic, fused quartz, single-crystal quartz, and other dielectrics measured in a frequency band of 10-70 GHz are presented.
      
KTN thin films prepared by pulsed laser deposition on transparent single crystal quartz (100)
      
Finally, measurements have been made on some single-crystal quartz specimens using an automated open resonator measurement system at 8mm band.
      
Raman scattering by hot and thermal polaritons in crystal quartz
      
coherent Raman scattering by polaritons driven by a CO2 laser, has been used to obtain the dispersion curve and its width inq-space of the polariton associated to theE-phonon at 1065 cm-1 in crystal quartz.
      
更多          
  其他


By sublimation of NaCl crystals of high purity in vacuum at a temperature near its melting point single NaCl crystals of macroscopic size were grown at zones of somewhat lower temperatures. Oriented overgrowths up to 1 mm thick were obtained over the whole cleavage faces of the crystals, but the deposition was much

半个世纪以来,从NaCl的蒸汽生长其单晶体的企图并没有得到正面的结果,解理面上的取向性结晶也尚未有超过数个分子层者。对于从溶液结晶出来时NaCl晶面发展的顺序,或者相对的重要性的研究已有肯定的结果。关于晶核或生长驼峰发端的位置从几率上看应在晶面何处的时尚理论未能从NaCl自溶液中结晶出来的实验加以证实或否定。 为探索从蒸汽相生长NaCl单晶体的规律,本实验初步获得较大尺度的单晶体,并同时使取向性晶面上结晶达到1毫米以上的厚度。 升华蒸汽来源于高纯度的从熔融体结晶出来的单晶体,并使母晶和结晶基面保持在近于NaCl熔点的温度。蒸发和结晶系在放置于两相邻接的电炉中的真空石英管内的不同温度区域进行的。我们观察了结晶区域内各分区结晶的特征,以及管端造形对于晶体方位和粒度大小的影响。观察到晶面出现几率的顺序为100>111>120>122>110。其中111对于120的优势显然不如在溶液中结晶时那样肯定,但目前尚未得到足够的几率上的根据来倒易这个顺序。122为气成单晶上新发现的晶面。122面可能在三种情况下出现: a)以自然面的形式出现; b)做为晶体与其载荷基底或载荷晶面的接触面; c)在形成交互生长时与另...

半个世纪以来,从NaCl的蒸汽生长其单晶体的企图并没有得到正面的结果,解理面上的取向性结晶也尚未有超过数个分子层者。对于从溶液结晶出来时NaCl晶面发展的顺序,或者相对的重要性的研究已有肯定的结果。关于晶核或生长驼峰发端的位置从几率上看应在晶面何处的时尚理论未能从NaCl自溶液中结晶出来的实验加以证实或否定。 为探索从蒸汽相生长NaCl单晶体的规律,本实验初步获得较大尺度的单晶体,并同时使取向性晶面上结晶达到1毫米以上的厚度。 升华蒸汽来源于高纯度的从熔融体结晶出来的单晶体,并使母晶和结晶基面保持在近于NaCl熔点的温度。蒸发和结晶系在放置于两相邻接的电炉中的真空石英管内的不同温度区域进行的。我们观察了结晶区域内各分区结晶的特征,以及管端造形对于晶体方位和粒度大小的影响。观察到晶面出现几率的顺序为100>111>120>122>110。其中111对于120的优势显然不如在溶液中结晶时那样肯定,但目前尚未得到足够的几率上的根据来倒易这个顺序。122为气成单晶上新发现的晶面。122面可能在三种情况下出现: a)以自然面的形式出现; b)做为晶体与其载荷基底或载荷晶面的接触面; c)在形成交互生长时与另一晶体的100面为共面。 本实验发见一种新的规律性的插生关系,它与自溶液中结晶出来的NaCl晶

The impurity distribution to be expected in a pulled crystal of silicon is investigated theoretically for the general case that the starting material may contain various donor and accepter impurities and the grown crystal as well as the crucible may have non-uniform cross-sections. Equations determining the distributions of the various impurities are set up, taking account of effects of crucible contamination, impurity evaporation and segregation. It is shown that the solutions can be expressed as linear combinations...

The impurity distribution to be expected in a pulled crystal of silicon is investigated theoretically for the general case that the starting material may contain various donor and accepter impurities and the grown crystal as well as the crucible may have non-uniform cross-sections. Equations determining the distributions of the various impurities are set up, taking account of effects of crucible contamination, impurity evaporation and segregation. It is shown that the solutions can be expressed as linear combinations of certain characteristic functions (depending on shape of the crucible and the crystal grown) with appropriate coefficients which are directly related to the impurity concentrations in the starting material and the crucible contamination coefficient. Three crystals are grown and the longitudinal distributions of conductivity are measured. The characteristic functions are calculated for each case from the shapes of the crystal and the crucible. By comparison of the theoretical impurity distributions with the measured conductivity distributions, the appropriate coefficients of linear combinations can be determined. In this way, one obtains an approximate estimate of the crucible contamination coefficient, the impurity contents in the starting material as well as the distributions of the different impurities in the crystals grown. The crucible contamination coefficient thus determined agree with values estimated by other methods.

对于原材料含有多种杂质,石英坩埚对熔硅有沾污,晶体截面和坩埚截面并非常数的情况,分析和计算了拉硅单晶时熔体中杂质浓度的变化和单晶中的杂质分布。理论上必须同时考虑多种杂质的污沾、蒸发和分凝过程。实验测定了硅单晶中电阻率分布,与理论相符合。利用这里提出的分析方法,可以确定出石英坩埚的沾污率,并可粗略估计单晶中各种杂质的分布情况以及原材料所合杂质的情况。并且利用复拉单晶的办法,试验了几种测定坩埚沾污率的方法。各种方法所测得的坩埚沾污率值相近,为(1.0—1.5)×10~(11)硼原子/秒·厘米,相应的石英坩埚硼合量约为10~(-6)克硼/克石英

The oscillating frequency range of quartz crystal at basic oscillator circuits is analyzed and the critical frequency is introduced.It is shown that the oscillating frequencies of the three basic oscillator circuits Iie between the series resonance and the critical frequencies of the crystal, and generally it cannot be oscillated on. the parallel resonance frequency of the crystal.General formulas of the oscillating frequencies of the three basic oscillator circuits and the required transconductance of the tube...

The oscillating frequency range of quartz crystal at basic oscillator circuits is analyzed and the critical frequency is introduced.It is shown that the oscillating frequencies of the three basic oscillator circuits Iie between the series resonance and the critical frequencies of the crystal, and generally it cannot be oscillated on. the parallel resonance frequency of the crystal.General formulas of the oscillating frequencies of the three basic oscillator circuits and the required transconductance of the tube are given.Finally, the ideal oscillating range is discussed and it is thought that the frequency stability of any types of oscillator increases as the oscillating frequency approaching to the series resonance frequency of the crystal.

本文用解析的方法分析了石英晶体在基本振荡电路中的振荡范围,引入临界频率概念,并证明三种基本振荡电路的振荡频率都在晶体的串联谱振频率与临界频率之间,而在一般情况下,不可能振荡在晶体的并联谐振频率上。文中还给出了三种基本振荡电路的振荡频率的普遍公式。最后讨论了理想的振荡范围,认为不论何种振荡器,其振荡频率愈接近晶体的串联谐振频率,由于电路元件不稳定引起的频率漂移就愈小。

 
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