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前驱
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  precursor
     Study on Preparation of CaTiO_3-based Microwave Dielectric Ceramics Via Polymeric Precursor Method
     聚合物前驱体法合成CaTiO_3基微波介质陶瓷的研究
短句来源
     The Properties of Alloy Element Introduced in Anodic Film by Hydrotalcite Precursor Method
     双羟基金属氧化物前驱体法引入合金元素制备铝复合阳极氧化膜及其性能研究
短句来源
     Study on the Basic Theory and Process of Coprecipitation by Salt Carbonate to Produce Mn-Zn Ferrite Precursor
     锰锌软磁铁氧体用前驱体碳酸盐共沉过程基础理论及工艺研究
短句来源
     PRECURSOR VACCUM-ULTRAVIOLET RADIATION AHEAD OF STRONG SHOCK WAVES IN SHOCK TUBE
     激波管中强激波的前驱真空紫外辐射
短句来源
     Pyrolysis of PLZT Citrate Precursor
     PLZT柠檬酸盐前驱体的热分解
短句来源
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  prodromal
     ②Among the patients with hepatic encephalopathy the level of nitric oxide in sera of Lethargy and Coma periods was (122.1±25.3)μmol/L,which was higher than that of Prodromal and Precoma periods,(87.4±22.6)μmol/L(P<0.01);
     ②肝性脑病昏睡期和昏迷期血清NO值为 (12 2 .1± 2 5.3) μmol/L ,较前驱期和昏迷前期患者血清NO值 (87.4± 2 2 .6 ) μmol/L为高 (P <0 .0 1) ;
短句来源
     The total sera positive rate was 97 . 44% ( 38 / 39 ) while only 35. 90 % ( 14/39) in prodromal period and exciting period , 94. 60% ( 35/37) in paralysis period .
     血清总阳性率为97.44%(38/39),但在前驱期和兴奋期仅为35.90%(14/39),麻痹期为94.60%(35/37)。
短句来源
     Conclusions SARS can be divided into five stages: incubation period 2 to 10 days,prodromal period 1 to 3 days,progressive period 4 to 7 days,advanced period 8 to 15 days were,convalescent period 16 to 24 days.
     结论 SARS患者可分 5期 :潜伏期 2~ 10d ,前驱期 1~ 3d ,进展期 4~ 7d ,极期 8~ 15d ,恢复期 16~ 2 4d。
短句来源
     The SOM prodromal period was averagely 3.8 months from suspected SOM to confirmed SOM.
     SOM的前驱期平均为3.8个月。
短句来源
     Results: The average age of onset was 36.0±11.9, all the 9 patients had the history of prodromal immunization or viral infections.
     结果:9例患者(男3例,女6例)平均起病年龄(36.0±11.9)岁,均有疫苗接种或前驱感染史诱因。
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  matrix precursor
     Studies on Pyrolysis Properties and Kinetics of Carbon Matrix Precursor CH_3ArCH_2NH_2
     碳前驱体CH_3ArCH_2NH_2的热解性能及动力学研究
短句来源
     Studies on Thermodynamics and Kinetics about Pyrolysis Mechanism of Carbon Matrix Precursor CH_3ArCH_2NH_2
     碳前驱体CH_3ArCH_2NH_2热解反应的热力学和动力学DFT研究
短句来源
     Based on the experiment, the pyrolysis mechanism of carbon matrix precursor CH 3ArCH 2NH 2 was further studied by quantum chemistry computation.
     在实验研究基础上 ,通过量子化学理论计算对碳前驱体 CH3 Ar CH2 NH2 的热裂解机理作了进一步的研究 .
短句来源
     Upon post treatment at 350℃, theoretical carbon yield of the C PF/SPF might reach 80%, showing an attractive possibility as a matrix precursor of C/C composites.
     基于TG—MS结果的理论计算表明 ,C—PF/SPF经 35 0℃热处理后的理论残碳率可达 80 % ,是一种具有应用前景的C/C复合材料用基体前驱
短句来源
     New matrix precursor for carbon-carbon composites—COPNA resin
     新型C/C复合材料基体前驱体—COPNA树脂
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  “前驱”译为未确定词的双语例句
     STUDY ON METHANOL SYNTHESIS OVER Cu-BASED CATALYSTS PREPARED BY AHTD——Ⅱ. PROPERTIES OF OXIDE PRECURSORS OF THE CATALYSTS
     AHTD法铜基催化剂合成甲醇的研究——Ⅱ.催化剂氧化态前驱体的性质
短句来源
     Raman and Infrared Spectra of ZY Perecursors
     ZY前驱体拉曼光谱和红外谱研究
短句来源
     Study on the Preparation Electronic Ceramic BaTiO_3 Powder by Liquid Phase Homogneous Precipitation Ⅱ.The Thermal Decomposition Machanism of BaTiO(C_2O_4 )_24H_2O
     电子陶瓷粉BaTiO_3的液相合成技术Ⅱ前驱体草酸氧钛钡热分解机理研究
短句来源
     THE STUDY OF RAMAN AND INFRARED SPECTRA OF ZY PRECURSORS
     ZY前驱体的拉曼和红外光谱研究
短句来源
     Study on the Calcination of the Titania Coated Mica Nacreous Pigments
     云母钛珠光颜料的液相合成技术 Ⅱ云母钛前驱体的热处理过程研究
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  precursor
The overall process involves three steps: preparation of insoluble carboxyl-containing grafted starch copolymer (ISC), formation of precursor (ISC-Co), decomposition of ISC-Co, and phase transition of Co3O4 nanoparticles.
      
The precursor was proved to be [Zn5(OH)6(CO3)2] by TG-DTG-DTA and IR analysis.
      
This precursor was calcined at 300°C for 1, 2 and 3 hours respectively, and then the nanocrystalline ZnO of different grain size were obtained.
      
Steam produced during the decomposition process accelerated the sintering of MgO, and MgO with surface area as high as 412 m2 · g-1 was obtained through calcining its precursor in flowing dry nitrogen at 520°C for 4 h.
      
ZrWMoO8 powders with different morphologies were obtained using ammonium tungstate, molybdate tungstate and zirconium tungstate as the starting materials by dehydrating the precursor ZrWMoO7(OH)2(H2O)2.
      
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  prodromal
These prodromal periods were compared with a recent control period during which the patient was in remission.
      
Prodromal periods were characterised by a significant increase in the number and magnitude of symptoms compared with those present during remission.
      
The observed prodromal symptoms underline emphatically the possibility of an early intervention in the course of the disease.
      
After non-specific prodromal symptoms, he developed the main clinical signs opsoclonus and myoclonus.
      
The prodromal stage takes several weeks and is unspecific.
      
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  matrix precursor
In this study, we investigated the influence of carbon nanofibers (CNFs) when mixed with phenolic matrix precursor on the microstructure and interlaminar shear strength (ILSS) of the ascured and carbonized composite specimens.
      
Their density and properties depend on the type and volume fraction of reinforcement, matrix precursor used and end heat treatment temperature.
      
The influence of adding pitch to resin as a matrix precursor on properties of carbon-carbon composites
      
4-directional carbon/carbon composites (4D C/C) were made from the matrix precursor of coal tar pitch through the process of impregnation and carbonization.
      
The C/C composites were prepared by filament winding method with a coal tar pitch as a matrix precursor, and followed by heat treatment at temperatures between 1000°C and 2800°C under argon flow.
      
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Reaction-bonded silicon nitride(RBSN) which contains both Y_2O_3 and Al_2O_3 may be usedas starting material to produce the engineering ceramics of dense silicon nitride by re-sin-tering at high temperature under one atmospheric pressure of nitrogen. (1) In view of the linear shrinkage, occurred during the re-sintering process and onbasis of the XRD and microstructure observations,the authors arrive at the conclusion thatthe re-sintering of RBSN at high temperature is controlled by liquid phase sintering me-chanism,...

Reaction-bonded silicon nitride(RBSN) which contains both Y_2O_3 and Al_2O_3 may be usedas starting material to produce the engineering ceramics of dense silicon nitride by re-sin-tering at high temperature under one atmospheric pressure of nitrogen. (1) In view of the linear shrinkage, occurred during the re-sintering process and onbasis of the XRD and microstructure observations,the authors arrive at the conclusion thatthe re-sintering of RBSN at high temperature is controlled by liquid phase sintering me-chanism, and that there is an apparent incubation period in the initial stage. (2) The SiO atmosphere produced by the powder bed is the requisite factor to retardthe thermal decomposition of silicon nitride. (3) In view of its small linear shrinkage(<6.5%), high bending strength (550~668MN/m~2), high Weibull modulus (28), the re-sintering of RBSN is considered to be a worthymethod in the production of engineering ceramics of silicon nitride.

本文采用添加 Y_2O_3 和 Al_2O_3 制备的反应烧结氮化硅(RBSN)作为前驱材料,在 1 atm 氮气中进行高温重烧结,可制得致密的氮化硅工程陶瓷。研究结果如下:(1)根据重烧结过程中的线收缩,X 射线衍射分析和微观结构的研究结果,认为反应烧结氮化硅的高温重烧结受液相烧结机理控制,同时在烧结的开始阶段有明显的诱导期存在;(2)由填料所产生的 SiO 气氛对控制氮化硅的热分解是必不可少的;(3)由于重烧结工艺使制品收缩小(<6.5%)、抗弯强度高(550~668MN/m~2)、Weibull模数大(28),因此它是一种制造氮化硅工程陶瓷的好方法。

The third paper provides a review and discussion on various explanations of the precursors of PKP, revealing that studies of the PKP may be of significance in seismic observations,and of certain value in the research on geodynamics and the structure of the Earth's Core.

文章综述介绍了有关 PKP 的前驱波的各种解释,并进行了相应的讨论,指出对 PKP 前驱波的研究不仅在地震观测上有重要意义,而且在研究地核结构和地球动力学方面也有一定的价值。

The technological Principle of Pretreatment of the graphite disc used in Synthe-sizing diamond by hydrostatic Pressure are described.It has been Proved on the grounds of thestructural character of graphite that some metalic ions can be led into the edge and holes ofthe crystal structure of graphite by Physicochemical method,so that an intermediate state(P-recursor of diamond crystal)tending to change into SP~3 hybrid state and favourablc to graphiteto-diamond transformation can be formed in graphite.The effect...

The technological Principle of Pretreatment of the graphite disc used in Synthe-sizing diamond by hydrostatic Pressure are described.It has been Proved on the grounds of thestructural character of graphite that some metalic ions can be led into the edge and holes ofthe crystal structure of graphite by Physicochemical method,so that an intermediate state(P-recursor of diamond crystal)tending to change into SP~3 hybrid state and favourablc to graphiteto-diamond transformation can be formed in graphite.The effect has been conformed in actualPractise.

本文叙述了静压法合成金刚石用石墨片前处理工艺的原理,通过石墨晶体特性的介绍,论证了用物理化学方法可以引入有催化作用的金属离子等进入石墨晶体结构边缘和空穴之中,使石墨晶体内存在一种向 sp~3杂化转化的中间状态——金刚石晶格的前驱体。这种石墨片,对合成金刚石十分有利。通过实际应用,已证明它的效果。

 
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