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大试样
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  large sized specimens
     The oxidation resistance of unfired Al-Si-containing low carbon Al2O3-β-SiAlON material(MAC-F)was investigated using high temperature thermogravimetric analyzer for large sized specimens,and the oxidation resistance of this material is compared with unfired Al-Si-containing Al2O3-C material(MAC-S).
     采用大试样高温热重分析仪研究了不烧Al-Si复合低碳Al2O3-β-SiAlON材料(MAC-F)的抗氧化性,并与Al-Si复合不烧铝碳滑板材料(MAC-S)进行了比较。
短句来源
     The structure and characteristics of the high temperature thermogravimetric analyzer(TGA) for large sized specimens and its application in researches of oxidation resistance and nitridation reaction were introduced.
     介绍了大试样高温热重分析仪的结构和特点以及在抗氧化性和氮化反应研究中的实际应用。
短句来源
  large specimen
     KIc obtained from the large specimen is 496 kg/mm3/2 and KIc's obtained from the JIc's of the small specimens are within 504 kg/mm3/2 ±5%. Both the single-specimen method and the resistance curve method are used in JIc determination.
     由 大试样测得的KIc为496kg/mm3/2,由小试样测得J1c后换算成的KIc为504kg/mm3/2±5%, 在JIc测定中同时采用单试样法及阻力曲线法。
短句来源
  “大试样”译为未确定词的双语例句
     The apparatus accepts samples with maximum dimensions of 100 mm×100 mm×180 mm,maximum mass 5000 g,and maximum experimental temperature 1600 ℃.
     该仪器允许的最大试样尺寸为100mm×100mm×180mm,最大试样质量为5000g,最高试验温度达1600℃。
短句来源
     Tensile deformation of remolded loess increases with dry density increasing under same water condition.
     试样干密度对重塑黄土拉伸变形的影响:试样含水率相同干密度越大,试样拉伸变形越大。
短句来源
     For nanometer CuO/ZrO_2 catalyst, the desulphurization rate of samples improves with the increment of specific surface area.
     对于纳米CuO/ZrO_2催化剂而言,比表面积越大,试样的脱硫率越高;
短句来源
     It is emphaticaly discussed in this paper about how to reasonably shorten the tcmperature retention time for quench heating large test pieces of No, 45 steel with sizes ofφ19O×250mm andφ320×300mm at production conditions.
     本文重点对45钢大试样:φ190×250mm、320×300mm在生产条件下,合理缩短淬火加热的保温时间进行了研究。
短句来源
     Aiming at the severe corrosion fatigue tendency of the pipeline in-service,a new low-cycle corrosion fatigue method of using a large purely-bended sample(480 mm×38 mm×12 mm) was developed.
     针对在役管道严重的腐蚀疲劳倾向性,比较前人相关的研究方法,提出了一种以大试样(480 mm×38 mm×12 mm)纯弯曲来研究低周腐蚀疲劳的新方法。
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  相似匹配句对
     Larger size of specimen leads to brittle response of specimen.
     试样尺寸越,脆性增强。
短句来源
     THE MEASUREMENT OF THERMAL EXP ANSION COEFFICIENT OF SOME LARGE SIZE OF SPECIMEN AT LOW TEMPERATURE
     低温试样热胀系数测试
短句来源
     Big and Good Matter
     好事
短句来源
     A Big Cheater
     骗子
短句来源
     pretreatnlent of sample;
     试样的预处理;
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  large sized specimens
The present structure estimation methods are rather long-termed and expensive; moreover, they are sometimes impossible to use in reason of difficulty of sampling large sized specimens.
      
  large specimen
While there are a number of methods to estimate this angle, x-ray diffraction (XRD) techniques have recently obtained a lot of attention because of their ability to provide information averaged over a significantly large specimen volume.
      
Although low intensity excitation-, without such fading-, was used, the acriflavine-SO2 staining procedure showed large specimen to specimen variability regarding both mean fluorescence intensities and coefficients of variation (CV).
      
A method for large specimen cryosectioning is described.
      
The main advantage of the method lies in the possibility to obtain two-dimensional chemical information from large specimen areas as well as from features on a nanometer scale.
      
Some attention is given to thermal fatigue, where fracture results primarily from a large specimen temperature rise due to hysteresis heating.
      
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In this paper the general approximate method is applied to calculate the stress intensity factor of the 9th-grade disk of 31-25-2 type steam turbine with a radial crack at the corner of the key-slot, and the fracture toughness of the disk material 34CrNi3Mo steel is determined. KIc obtained from the large specimen is 496 kg/mm3/2 and KIc's obtained from the JIc's of the small specimens are within 504 kg/mm3/2 ±5%. Both the single-specimen method and the resistance curve method are used in JIc determination....

In this paper the general approximate method is applied to calculate the stress intensity factor of the 9th-grade disk of 31-25-2 type steam turbine with a radial crack at the corner of the key-slot, and the fracture toughness of the disk material 34CrNi3Mo steel is determined. KIc obtained from the large specimen is 496 kg/mm3/2 and KIc's obtained from the JIc's of the small specimens are within 504 kg/mm3/2 ±5%. Both the single-specimen method and the resistance curve method are used in JIc determination. According to the KI of the disk with a crack at the key-slot and the KIc of the disk material, the critical length of the crack at the key-slot of the 9th-grade disk of 31-25-2 type steam turbine is determined to be 63.5mm, while the critical length of the crack measured from the fracture section of a similar disk is 65-70mm. The good coincidence shows that the results of the calculation and the experiment are reliable.

本文采用普遍适用的近似方法,计算了31-25-2型汽轮机9级叶轮在键槽圆角处有径向裂纹 情况下的应力强度因子KI,并且介绍了叶轮材料34CrNi3Mo钢的断裂韧性测试方法及结果。由 大试样测得的KIc为496kg/mm3/2,由小试样测得J1c后换算成的KIc为504kg/mm3/2±5%, 在JIc测定中同时采用单试样法及阻力曲线法。根据叶轮键槽裂纹KI的计算结果及叶轮材料KIC 的测定结果,确定31-25-2型汽轮机9级叶轮键槽裂纹的临界长度为63.5mm,而类似叶轮飞裂后 断口实测临界裂纹长度为65~70mm,二者符合较好,说明计算与实验结果是可靠的。

The characteristics of the ferroelectric hysteresis loop and its methods of measuring it are dis(?)ussed in detail in this paper. They are the fr(?)quencycompensation method, the resistance-compensation method, the phase shiftcompensation method and the line(?)r compensation method. The paper shows that, for such specimens, in which ferroelectric behaviour is very obvious, or in which conductance and dielectric loss are not very large, satisfactory results can be obtained by the resistance compensation method....

The characteristics of the ferroelectric hysteresis loop and its methods of measuring it are dis(?)ussed in detail in this paper. They are the fr(?)quencycompensation method, the resistance-compensation method, the phase shiftcompensation method and the line(?)r compensation method. The paper shows that, for such specimens, in which ferroelectric behaviour is very obvious, or in which conductance and dielectric loss are not very large, satisfactory results can be obtained by the resistance compensation method. But for other specimens, in which ferroelectric behaviour is very weak, or the dielectric loss is very large, the lincar-compensation method is recommended. The paper shows that, in order to obtain precise measurement of the spontaneous polarization P_s and the coercive field E_(?), it is very important to eliminate the influence of the phase shift difference due to the measuring system and the oscillograph amplifiers.

本文分析了电滞回线的特征及其测量方法,讨论和比较了频率补偿法、电阻补偿法、移相补偿法和线性补偿法的优缺点及其适用范围.本文指出,对于铁电性质较明显,电导与介质损耗不很大的试样,电阻补偿法可以获得满意的结果.但对于铁电性质微弱或电导与介质损耗很大的样品,则推荐采用线性补偿法.本文指出,为了准确地测定铁电体的自发极化强度P_s和矫顽电场强度E_c,消除测量系统和示波放大器的相移差是很重要的.

In the present paper the plastic part of the J-integral was derived on the base of the model of pure power hardening materials. The new expression found was J_p=-(U_p)/B((1/p )((?)p) /((?) q)) An attempt was also made to elucidate the thoretical basis and the approximity nature of the expression in current useJ_p =2U_p/B(w-α)· This later expression could be arrived at by assuming (1/p ((?)p) /((?) α)_△≈(1/pL ((?)pL) /((?) α)) and substituting it in the new expression.In this paper J-integral tesistance curves...

In the present paper the plastic part of the J-integral was derived on the base of the model of pure power hardening materials. The new expression found was J_p=-(U_p)/B((1/p )((?)p) /((?) q)) An attempt was also made to elucidate the thoretical basis and the approximity nature of the expression in current useJ_p =2U_p/B(w-α)· This later expression could be arrived at by assuming (1/p ((?)p) /((?) α)_△≈(1/pL ((?)pL) /((?) α)) and substituting it in the new expression.In this paper J-integral tesistance curves of four kinds of materials were quoted from our laboratory. It was found from the curves that: (1) within a quite wide range of the specimen sizes the plane strain resistance curve seems to be an inherent characteristic of the materials; (2) to the composition, heat treatment and microstructutre of the materials tested the crack initiation toughness is not so sensitive as the resistance curve; (3) for predicting K_(?) of large specimen with the aid of resistance curve, different points thn should be used for the two types of materials. For one type, K_(?) is related to the highest point (saturation point), for the other type to the initial point of the resistance curve.

本文根据纯幂硬化材料模型导出了J积分的塑性部分,又根据的假定,试图说明常用的Jp=2Up/B(W-a)计算式的理论根据和近似性。本文搜集了本实验室对四种材料所散的J积分阻力曲线,结果表明:(1)在相当大的试样尺寸变化范围内,阻力曲线近似为材料特性(2)某些材料的起裂韧性对成分,热处理和微观组织结构不敏感,而阻力曲线则不然(3)用阻力曲线预言大试样K_(IC)时,要区分两种类型材料,其K_(IC)分别相应阻力曲线最高点(饱和点)和起裂点。

 
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