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balls
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     Test Analysis on Contact Fatigue Life of Si_3N_4 Ceramic Balls and GCr15 Steel Balls
     Si_3N_4陶瓷与GCr15钢接触疲劳对比试验分析
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     Analysis on Cause for Defects of Si_3N_4 Ceramic Balls in Batch Manufacture
     Si_3N_4陶瓷批量加工缺陷原因分析
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     Effect of debris contamination on Si_3N_4 ceramic fatigue balls
     污染颗粒对Si_3N_4陶瓷疲劳影响的研究
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     According to the processing parameters, the solder Sn-37Pb, Sn-45Pb, Sn-0.7Cu and Sn-3.8Ag-0.7Cu solder balls have been prepared.
     根据确定的工艺参数,制备Sn-37Pb、Sn-45Pb、Sn-0.7Cu 和Sn-3.8Ag-0.7Cu焊
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     The balls sintered in 1510℃ have the best combination properties,with a density of 18.17 g/cm3,balls diameter variable of 0.12mm,crushing pressure of 54kN,compression rate of 30.6%.
     在1510℃下烧结的钨合金综合性能较好,其密度为18.17g/cm3,直径变化量为0.12mm,压溃压力为54kN,压缩率为30.6%。
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  “balls”译为未确定词的双语例句
     FATOU PROPERTY ON HARMONIC MAPS FROM COMPLETE MANIFOLDS WITH NONNEGATIVE CURVATURE AT INFINITY INTO CONVEX BALLS
     FATOU PROPERTY ON HARMONIC MAPS FROM COMPLETE MANIFOLDS WITH NONNEGATIVE CURVATURE AT INFINITY INTO CONVEX BALLS
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     The results of XRD showed that the components of balls werea- quartz, cristobalite, Fe_2O_3, Ca_2Al_2SiO_7, NaAlSi_3O_8, CaAl_2Si_2O_8, KAlSi_3O_8 and 3Al_2O_3·2SiO_2, etc.
     XRD检测表明其相组成为a-石英、方石英、Fe_2O_3、Ca_2Al_2SiO_7、NaAlSi_3O_8、CaAl_2Si_2O_8、KAlSi_3O_8和3Al_2O_3·2SiO_2等。
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     Activity attracted farmers were balls (21.40%), body building (14.30%), chess (11.71%), sport news (10.58%), sport traveling (10.20%) and playing dragon and lion dance (9.60%) in order.
     农民感兴趣的活动分别为球类活动(21.40%)、健身健美(14.30%)、体育棋牌(11.71%)、体育新闻(10.58%)、体育游园(10.20%)和舞龙舞狮(9.60%)等。
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     Balls into bins allocator algorithm
     Balls into bins分配器算法
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     Application of TQ Antiwear Cast Iron Balls in a φ3.2m×4.5m Ball Mill
     TQ抗磨铸铁球在φ3.2m×4.5m球磨机的工业试验
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  相似匹配句对
     Five Balls in Life
     生活中的五个球
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     Answer: Health Balls.
     答案是掌上健身球。
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  balls
Balls and quasi-metrics: A space of homogeneous type modeling the real analysis related to the Monge-Ampère equation
      
Since all of these convergence balls have the same center x*, they can be viewed as a homocentric ball.
      
The exchausted hot air is directly used to dry bearing balls.
      
An example demonstrates that the balls of initial states for which the latter property follows from the results are large enough to be used in actual computations.
      
No contamination of the mixture by the material of the balls and vessel during mechanical treatment was detected.
      
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The isothermal transformation of austenite in a ball-bearing steel within thetemperature range between martensite point M and room temperature has been investigated by electrical resistance measurements.The steel employed was ofcommercial production containing 1.43% Cr and 1.02% C and its martensite pointis 159℃ when quenched from 1100℃.The specimen was first quenched toroom temperature(in which state it contained 17% retained austenite),and thenupquenched to isothermal bath in which its transformation...

The isothermal transformation of austenite in a ball-bearing steel within thetemperature range between martensite point M and room temperature has been investigated by electrical resistance measurements.The steel employed was ofcommercial production containing 1.43% Cr and 1.02% C and its martensite pointis 159℃ when quenched from 1100℃.The specimen was first quenched toroom temperature(in which state it contained 17% retained austenite),and thenupquenched to isothermal bath in which its transformation was followed.Theeffect of tempering of martensite was eliminated by employing two specimens ofdifferent martensite contents.1)By comparing the kinetics of isothermal transformation below and abovemartensite point,it was concluded that isothermal transformation below M pointtakes place by the martensite process and not by intermediate transformation(bainitic),in.spite of the presence of large amount of martensite and relativelyhigh temperature at which the transformation takes place.2)From kinetics considerations it appears that isothermal transformationof retained austenite to martensite takes place not by the formation of new nuc-lei but mainly by the growth of already existing martensite.This would alsoinfer that coherency between martensite and austenite is not destroyed(or notcompletely destroyed)during quenching transformation.3)The tempering of martensite appears to be the controlling process forthe isothermal transformation of retained austenite to martensite,such that theelastic strain energy relaxed by tempering of martensite exceeds the difference offree energies between the two phases.The activation energy of tempering ofmartensite within the temperature range considered(below 150℃)was found tobe 13,300 cal/mol,which compares favourably well with the value of 16,000 cal/molas given by Averbach and Cohen in 1953.4)The results show that isothermal keeping for prolonged duration at theneighbourhood of 100℃ brings about maximum amount of transformation of re-tained austenite.That is,at either higher or lower temperatures and for a speci-fied time,the amount of austenite-martensite transformation is less.This is signifi-cant for practical heat-treating of precision gauges and tools for which dimen-sional stability is important and high temperature tempering may not be de-sirable for hardness consideration.

用电阻法研究了含1.43%Cr,1.02%C的滚珠钢在室温到马氏体点(159℃)温度范围内奥氏体等温转变过程。结果指出在这一温度范围内的等温转变是以马氏体转变的形式进行的,而不产生中温转变形式的等温转变。当样品由1100℃淬火至室温后再“上淬”至低于马氏体点的温度进行等温保持时,部分的残留奥氏体即等温转变为马氏体。根据动力学的考虑,这一转变很可能不是通过形成新的晶核,而是已有马氏体晶体的长大过程。同时,这种转变主要受已有马氏体回火过程的控制。在100℃左右长期等温保持时可以得到最大的残留奥氏体转变量。更高或更低的温度,在同一时间内转变量都较100℃左右为小,这可作为精密量具刃具实际热处理的参考。

The changes in the spontaneous electrical activity and in various kinds of evoked potentials of the cerebral cortex of the rabbit were studied during the period of post-natal development. Continuous spontaneous electrical potential changes of the cerebral cortex are first detectable about one week after birth. They attain the adult pattern about the end of the third week. Local application of 2% strychnine sulphate solution can already generate "strychnine spikes" during the first few days after birth, though...

The changes in the spontaneous electrical activity and in various kinds of evoked potentials of the cerebral cortex of the rabbit were studied during the period of post-natal development. Continuous spontaneous electrical potential changes of the cerebral cortex are first detectable about one week after birth. They attain the adult pattern about the end of the third week. Local application of 2% strychnine sulphate solution can already generate "strychnine spikes" during the first few days after birth, though there is much longer lag in their onset than in adult animal. The spikes are also of smaller voltage, slower time course and lower frequency. Among the evoked potentials, the response due to direct electrical stimulation of the cortex is the first to become elicitable, in a number of rabbits on the very first day after birth. The response of one hemisphere due to the stimulation of corresponding points of the other hemisphere and also the cortical response to antidromic stimulation of the pyramidal tract usually become obtainable a little later, but all within the first week. One or two days before the opening of the eyes which occurs about twelve days after birth, visual stimulation can already evoke typical responses in the visual cortex. A number of baby rabbits were ,born and continuously kept in the dark room while a number of others had their eye balls destroyed shortly after birth: by these means the effect of lack of light stimulation on the maturation of the electrical activity of the visual cortex was tested. The result was negative. The author is indebted to Prof. T. P. Feng for guidance throughout this work.

本工作觀察在出生後發育時期中小兔大腦皮層自發電位的成熟過程和被激起的電位的出現與變化。初生的小兔,用番木龞鹼溶液直接塗在大腦皮層土郎能引起番木龞鹼波,但是在出生後一週左右大腦皮層才開始有連續的電位變化。在出生後的第三週末第四週初時小兔大腦皮層的自發電位的圖形已與從大免得到的相仿。在大腦皮層各種被激起的電位變化中,直接刺激大腦皮層所引起的負電位出現得最早。通過胼胝體所引起的電位變化以及刺激錐體束在大腦皮層引起的電位變化都在小兔出生後一週內出現,這兩種電位初出現時都缺少相當於在成年兔得到的相應的反应中,由於突觸後反應所引起的那些部分。兔在出生後的12天左右睜眼。在出生後10天左右用光線刺激眼睛已能在大腦皮層視區引起反應,使眼睛不見光或摘除眼睛對視區電位變化的成熟看不出有影響。

A second-approximation solution for the pressure distribution between two elastic bodies in contact is presented. In addition to the terms used by Hertz as the description of a general surface of contact, the present theory will contain the next higher-order terms of its Taylor's series expansion, such that the coefficients of the Hertz second power terms as well as the dominant fourth-power term is satisfied. Hence, the second order effect is a correction to Hertz theory which increases both with the increase...

A second-approximation solution for the pressure distribution between two elastic bodies in contact is presented. In addition to the terms used by Hertz as the description of a general surface of contact, the present theory will contain the next higher-order terms of its Taylor's series expansion, such that the coefficients of the Hertz second power terms as well as the dominant fourth-power term is satisfied. Hence, the second order effect is a correction to Hertz theory which increases both with the increase of normal load and with the increase of eccentricity of the contact. ellipse. method of change of variables is adopted in the process of integration. The solution, thus obtained, agrees exactly with that obtained by Cattaneo when reduced to his special case of two solids of revolution in contact.To illustrate the usefulness of the present theory, the problem of contact between a ball and the outer race of a ball bearing is studied. Curves are plotted to show that the relative magnitude of the second order effect varies with the shape ratio of the contact ellipse at various normal loads.

本文中提供了關於彈性接觸體間壓力分佈的一個二次近似解。解中的高次量效應是對赫芝理論的一個改進;它的影響隨着外力或接觸椭圓面偏心率的增加而顯得更重要。因此這個解在某些實際應用上如滚珠軸承中滾珠与珠槽間的接觸問題,是较需要的。同時當接觸體均為迴轉體這一特殊情况下、本文解答就同凱泰尼奥之解,完全一致。

 
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