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fec
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  前向纠错
     The interim standard [TIA/EIA/IS-787] of the satellite ATM for forward error correction (FEC) adopts a method of dynamic and adaptive RS coding.
     卫星ATM的标准[TIA/EIA/IS-787]中规定, 前向纠错码(Forward Error Correction,FEC)采用动态和适当的RS编码。
短句来源
     So far there are two kinds of technique used for error control: FEC (Forward Error Correction) and ARQ (Automatic Repeat Request).
     迄今为止,有两种主要的差错控制机制:前向纠错编码(FEC,Forward Error Correction)和自动重传请求(ARQ,Automatic Repeat Request)。
短句来源
     Therefore for guaranteeing video quality, FEC (Forward Error Correction) can be adopted to improve the reliability of video data transmission;
     因此为了保证视频质量,可以采用前向纠错编码(FEC:Forward Error Correction)来提高视频数据传输的可靠性;
短句来源
     Double-binary Turbo code is one of the FEC methods for multi-carrier OFDM physical layer of 802.16 standard which supports the WMAN.
     双二元Turbo码(double-binary Turbo code)是支持无线城域网(WMAN)的802.16d标准中多载波OFDM系统物理层采用的前向纠错码方案之一。
短句来源
     Experiment of error-free 8×10 Gb/s 2 015 km transmission without foward error correction(FEC) and electric relay were demonstrated.
     652光纤上无前向纠错(FEC)无电中继实现8×10 Gb/s零误码传输。
短句来源
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  铁碳
     At the temperature 1400℃, the pellets can transform to chrome or Cr 7C 3, or (Fe·Cr) 7C 3 with the existing of Fe C compound. Thus the pellets can be detoxicated thoroughly and recycled for the reuse of Cr, Fe elements.
     在1400℃熔炼还原后的铬渣球团,可使铬全部还原成金属铬或Cr7C3,在铁碳化合物存在的情况下,可形成(Fe·Cr)7C3,铬渣彻底解毒,并能回收铬渣中的Cr、Fe等元素。
短句来源
     Then,under the most favorable working condition,we futher treated the wastewater by the above method,resulting in the removal rate of colors and CODcr reaching about 80% and 55%,repectively. The condition is as follows: pH=3.00,reaction time=40 min,mass ratio of Fe&C to wastewater=0.2,Fe:C=3,and the temperature=30℃.
     接着在pH=3.00,处理时间40m in,铁碳加入量:废水(质量比)=1:5,铁:碳=3:1,温度=300C的最佳工艺条件下,用铁碳内电解法进一步对废水进行了处理,COD cr可以进一步下降到6948.38m g/L,COD cr去除率接近55%,色度去除率达80%。
短句来源
     According to the data of the melting heat of iron, the author corrected the solidus of FeC binary phase diagram in the rich iron end,and according to the corrected solidus e-valuated the carbon content at point H in 0.06 4%,the distribution ratio of carbon content in solid and liquid phasc is 0.12。
     根据铁的熔化热数据,校正了铁碳二元相图富铁端的固相线,并根据校正后的固相线,求出H点的碳含量为0.064%,结晶时碳在固、液相中的分配比为0.12。
短句来源
     The reaction mechanism and technological process of the experiment on treatment of printing and dyeing wastewater with Fe C micro electrolysis are introduced in this article. The optimum process conditions are found by several series of contrastive experiments, the primary factors and existing problems on influencing removal efficiency are analysed.
     介绍了铁碳微电解法处理印染废水试验的反应机理、工艺流程 ,通过多组对比实验所得数据 ,从中找出实验的最佳工艺条件 ,并分析了影响处理效果的主要因素和存在问题。
短句来源
     Three dimensional temperature filed,for CW laser surface remelting of Al Si and Fe C alloy and the eutectic coupled zone at the condition of rapid solidification,has been calculated by numerical simulation,to get the eutectic coupled zone of f nf alloy at the condition of rapid solidification through by the two kinds of typical f nf alloy,in this paper.
     本文对连续激光表面重熔铝硅、铁碳合金温度场的变化 ,及快速凝固的微观组织形态的演绎进行了数值模拟 ,以期通过对这两种典型的f nf系合金的研究 ,得到f nf系合金在激光表面重熔下微观组织形态演绎的共同特征。
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  “fec”译为未确定词的双语例句
     2)in Mn -Fe -C systems,ε Fe C =582/T+0.0204,ε Fe C =1776/T+0.4760and e Fe C =8.3134/T+0.0018.
     2)Mn-Fe-C系,εFeC=582/T+0.0204,εFeC=1776/T+0.4760和eFeC=8.3134/T+0.0018。
短句来源
     Theoretical study on the reaction of Fe(~5D/~3D)+CH_2(~1A_1)→FeC+H_2
     Fe(~5D/~3D)+CH_2(~1A_1)→FeC+H_2的理论研究
短句来源
     Structural Study of Mixed Cluster (C_5H_5FeC_5H_4C_2Ph)Co_2(CO)_6
     混合簇合物(G_5H_5FeC_5H_4C_2Ph)Co_2(CO)_6的结构研究
短句来源
     The Crystal and Moleculer Structure of [(C_5H_5FeC_5H_4)_2CR,R~1](R=CH_3,R~1=C_3H_7,CH_2-ph)
     [(C_5H_5FeC_5H_4)_2CR,R′](R=CH_3;R′=C_3H_7,CH_2Ph)的晶体和分子结构
短句来源
     2)in Mn -C and Mn -Fe -C systems,lnγ 0C =-1.9335,ε C C =11.4624,e C C =0.1771,ε Fe C =0.3545,ε Fe C =1.4914,e Fe C =0.0066;
     (2)Mn-C系和Mn-Fe-C系,lnγ0C=-1.9335,εCC=11.4624,eCC=0.1771,εFeC=0.3545,εFeC=1.4914,eFeC=0.0066;
短句来源
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  fec
Kinetic investigations of the anodic dissolution of white iron, containing ferritic (99.975% Fe) and cementite (Fe3C) phases, oxalic acid environment evidence that the alloy is passivated due to the formation of a FeC2O4 polylayer.
      
The optimum geometry calculated for the (CpFe)2C60H10 complex is used for modeling of the structure of the quasi-linear macromolecule [-FeC60H10-]n, (I).
      
The band structure of the spectrum of this macromolecule is compared with the spectra of the hypothetical molecules [-FeCp-]n and [-FeC20-]n.
      
Theoretical study of the structure and stability of the heme dimer (FeC34H32N4O4)2 and its ion (FeC34H32N4O4)2+
      
The computation results are compared with the analogous calculated data on monomeric heme and hemin+, as well as the previously considered dimeric ferriporphyrin X molecule and ion FeC34H31O4N4)20, +.
      
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X-ray identification of phases of nitriding surface deposits reveals that the deposits are α-Fe、Fe2N、Fe4N, FeC and Fe3O4, and that the dissociation reactions of FeN→Fe2N→Fe3N→Fe4N are proved correct during nitriding, Electron probe analysis of nitriding layer of carbon steels demonstrates that maximum nitrogen concentration lies between the diffusion layer and matrix, while the concentration of carbon in the nitriding layer is higher than the matrix, hence the phenomeion of carbon back diffusion from matrix...

X-ray identification of phases of nitriding surface deposits reveals that the deposits are α-Fe、Fe2N、Fe4N, FeC and Fe3O4, and that the dissociation reactions of FeN→Fe2N→Fe3N→Fe4N are proved correct during nitriding, Electron probe analysis of nitriding layer of carbon steels demonstrates that maximum nitrogen concentration lies between the diffusion layer and matrix, while the concentration of carbon in the nitriding layer is higher than the matrix, hence the phenomeion of carbon back diffusion from matrix to nitri ding layer is present. The resultant obtained from observation of bombardment surface with an electron microscope is found to conform to that gained with an ordinary metallographic microscope[1].

对氮化表面沉积物进行x射线物相鉴定,发现沉积物为a-Fe、Fe_2N、Fe_4N、FeC以及Fe_3O_4,说明氮化时FeN→Fe_2N→Fe_3N→Fe_4N的分解反应是正确的。碳钢氮化层电子探针分析表明,氮浓度极大值位于扩散层与基体组织之间,而碳浓度较基体组织高,可能存在碳由基体组织向氮化层反向扩散的问题。用电子显微镜观察轰击表面,得到与金相显微镜观察相一致的结论。用x射线测定了离子轰击点阵静畸变,发现离子轰击和高温回火(520℃)产生ε→ε+r’的转变。

The magnetoplumbite structure La_x Zn_xBa_((1-x)) Fe_((12-x))O_(19) ferrites were prepared by chemical coprecipitating from mixed chlorides solution using ammonicum oxalate as a precipitant. The phase transition and magnetic properties have been studied during sintering procees. The main results are as follows: 1) Solid solution of the(La, Ba, Zn, Fe)C_2O_4°nH_2O based on FeC_2O_4° 2H_2O can be formed when the substituted quantily of La ions is less than 0.8. 2) The temperature forming La_xZn_xBa_((1-x))Fe_((12-x))O_(19)...

The magnetoplumbite structure La_x Zn_xBa_((1-x)) Fe_((12-x))O_(19) ferrites were prepared by chemical coprecipitating from mixed chlorides solution using ammonicum oxalate as a precipitant. The phase transition and magnetic properties have been studied during sintering procees. The main results are as follows: 1) Solid solution of the(La, Ba, Zn, Fe)C_2O_4°nH_2O based on FeC_2O_4° 2H_2O can be formed when the substituted quantily of La ions is less than 0.8. 2) The temperature forming La_xZn_xBa_((1-x))Fe_((12-x))O_(19) phase increases with the increasing 3) When the value of x in the La_xZn_xBa_((1-x))Fe_((12-x))O_(19) increases, the specific magnetization at room temperature increases and the Curie point decreases.

采用草酸盐化学共沉淀工艺制备了La_xZn_xBa_((1-x))Fe_((12-x))O_(19)磁铅石型铁氧体,研究了烧结过程的相变与磁性,主要结论如下: 1)当La的置换量小于0.8时,基本上可以形成FeC_2O_4·2H_2O为基的(La, Ba, Zn, Fe)草酸盐固溶体。 2)La_xZn_xBa_((1-x))Fe_((12-x))O_(19)相的生成温度随x值的增加(x≥0.8)而升高。 3)L2_xZn_xBa_((1-x))Fe_((12-x)O_(19)的室温比磁化强度随x值的增加(z≤0.8)而增大,居里温度随x值的增加而降低。

The magnetoplumbite structure La_xZn_xBa_(1-x)Fe_(12-x)O_(19)febrites were prepared by chemical coprecipitating from mixed chlorides solution using am- monicum oxalate as a precipitant.The phase transition and magnetic properties have been studied during sintering procees.The main results are as follows: 1)Solid solutions,of the(La,Ba,Zn,Fe)C_2O_4·n_H_2O based on FEC_2O_4. 2H_2O can be formed when the substituted quantity of La ions is less than 0.8. 2)The temperature forming La_xZn_xBa_(1-x)Fe_(12-x)O_(19)phase...

The magnetoplumbite structure La_xZn_xBa_(1-x)Fe_(12-x)O_(19)febrites were prepared by chemical coprecipitating from mixed chlorides solution using am- monicum oxalate as a precipitant.The phase transition and magnetic properties have been studied during sintering procees.The main results are as follows: 1)Solid solutions,of the(La,Ba,Zn,Fe)C_2O_4·n_H_2O based on FEC_2O_4. 2H_2O can be formed when the substituted quantity of La ions is less than 0.8. 2)The temperature forming La_xZn_xBa_(1-x)Fe_(12-x)O_(19)phase increases with the increasing x. 3)When the value of x in the La_xZn_xBa_(1-x)Fe_(12-x)O_(19)increases,the specific magnetization at room temperature increases and the Curie point decre- ases.

采用草酸盐化学共沉淀工艺制备了 La_x Zn_x Ba_(1-x)Fe_(12-x)O_(19)磁铅石型铁氧体,研究了烧结过程的相变与磁性,主要结论如下:1) 当 La 的置换量小于0.8时,基本上可以形成 FeC_2O_4·2H_2O 为基的(La,Ba,Zn,Fe)草酸盐固溶体。2)La_x Zn_x Ba_(1-x)Fe_(12-x)O_(19)相的生成温度随 x 值的增加(x(?)0.8)而升高。3)La_x Zn_x Ba_(1-x)Fe_(12-x)O_(19)的室温比磁化强度随 x 值的增加(x(?)0.8)而增大,居里温度随 x 值的增加而降低。

 
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