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球径     
相关语句
  ball diameter
     It is of benefit to fineing of WC-Co composite that the ratio of ball to powder is 15:1, the ball diameter is 8 mm and 12 mm, absolute alcohol with low surface tension is used as grinding medium and its amount is 12 ml, and the milling speed is 250 r/min.
     试验表明,球料比为15:1、球径8 mm和12 mm的球比1:1,球磨介质为12 ml无水乙醇及球磨机转速为250 r/min,有利于细化WC-Co复合粉末。
短句来源
     How to add balls by mass average ball diameter
     如何用质量平均球径补球
短句来源
     The accurate numerical value of contact stress in outer raceway and ball diameter under high-speed was achieved with the finite element analysis method of Hertz contact.
     用Hertz接触问题的有限元法分析方法,得到高速下球径与外圈接触应力的数值解。
短句来源
     A New Method for Measuring Tiny Ball Diameter
     一种微球球径测量的新方法
短句来源
     The designer has raised stricter requirement to quality and examining than the standards because that the maximum inscribed ball diameter of the two fork tubs is 102 m,the geological conditions of the surrounding rock are unfavorable as well as its construction schedule is pressing.
     2个岔管最大内接球径为10 2m,加上围岩地质条件差、工期紧等原因,设计提出了高于规范规定的质量和检测要求。
短句来源
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  sphere diameter
     Large Internal sphere diameter measurement on line
     大型内球面球径的在线测量
短句来源
     A new method is advanced to calibrate the sensitivity and zero point in multi-passage sphere diameter gauge with two standard spheres.
     提出了用两只标准球同时标定具有多个测量通道的球径测量仪各通道的灵敏度和零点的一种新方法,避免了各通道单独标定的繁杂过程。
短句来源
     In this paper, the curve which denotes the relations between sphere diameter, cold speed and distance from quenching end, is established by the author's test.
     通过试验,本文建立了球径、冷速与至水冷端距离三者之间的关系曲线。
短句来源
     Research on calibrating the multi-passage sphere diameter gauge with two standard spheres
     基于双标准球的多通道球径测量仪的标定
短句来源
     This method has been successfully used in the calibrating process of pneumatic sphere diameter gauge with six passage. This method is simple,practical and reliable and can be applied to other multi passage measurement systems.
     该方法已成功地应用在具有六个测量通道的气动球径量规的标定过程 ,具有简单、实用、可靠的特点 ,并可推广应用于各种多通道测量系统
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  spherical diameter
     Gauss distribution function was utilized to describe the distribution of the mean percentage of the equivalent spherical diameter (BSD) of marine phytoplankton.
     本文首先利用显微测微法计确定浮游植物粒径分布的大致范围,并以此为指导,利用库尔特计数法得到浮游植物的粒径分布状况和中值等效球径
短句来源
     3.Reduction of RBC area,circumference,diameter,and spherical diameter of rats were only induced by IDA and exercise under IDA.
     3.红细胞面积、周长、直径和球径仅在铁缺乏情况下缩小;
短句来源
     The structure of a radial spherical plain bearing GEZ101ES was optimized making use of ANSYS finite element method. The optimized spherical diameter for the GEZ101ES bearing was obtained under static load and unchanged assembly dimensions, by changing the value of the spherical diameter.
     利用ANSYS有限元软件对向心关节轴承GEZ101ES进行结构优化,在装配尺寸不变的条件下,通过改变球径尺寸,得到了静载荷条件下向心关节轴承球径的优化值;
短句来源
     It was found that when the spherical diameter of the spherical bearings decreased by 1 mm, the 3rd primary stress under the rated static load decreased from 1623.4 MPa to 1150.1 MPa, which indicated that the optimization of the spherical bearing contributed to greatly decrease the normal stress applied onto the bearing.
     结果表明:将球径减小1.0mm时,关节轴承所受的最大压应力从1623.4MPa减小到1150.1MPa;
短句来源
  ball size
     Study on Effect of Ball Size Precision on Metallurgical Performance of Beneficiation
     球径精确化对选矿指标的影响研究
短句来源
     A horizontal high energy stirring ball miller is used to prepare sheet zinc powder. Under the dry ball milling conditions, milling time, temperature, rotation speed, the ratio of ball and materials, ball size and atmosphere are investigated. The corresponding conditions are agreed on as follow: ball size:3mm;
     选择卧式高能搅拌球磨机为本研究的粉碎设备,采用干式搅拌高能球磨,分别考察了球磨机转速、球磨时间和温度、球料比、球径和球磨气氛对粉末性能的影响,确定了球磨的工艺条件:球径3mm;
短句来源
     In this paper,it's discussed that the ball size has a optimization to different monosized ore by the mill of different ball size,which has a best product size characteristic.
     研究了不同粒级的物料在不同的钢球尺寸作用下都存在一个最适宜球径 ,使得其产品粒度特性最好。
短句来源
     A novel method on loading and adding balls in ball mill is established by accurate ball size theory.
     用球径精确化理论改进现有选厂球磨机的装补球方法。
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      ball diameter
    A ball diameter of exactly 1/4 inch diameter makes it possible to machine a corresponding socket of metal very cheaply.
          
    By varying the ball density while keeping the ball diameter and the charge ratio constant, the collision energy was independently controlled.
          
    Choice of proper Young's modulus and ball diameter enables artificial grain boundaries to be created, producing appropriate domain refinement and loss reduction.
          
    The dependence of various parameters on the indenting ball diameter and bearing of the anisotropy due to sheet extrusion is elaborated.
          
    Again I varied parameters such as ball diameter, laser color, and the distance from the bearing to the detection screen.
          
    更多          
      sphere diameter
    In this case, at given density and temperature, the only parameter of the theory is the hard-sphere diameter.
          
    The hard-sphere diameter has been determined from the dependence of the interproton interaction on the distance and the known temperature of the system.
          
    The floating and sinking of different density spheres in a gas-solid fluidized bed was investigated by changing the superficial air velocity, bed height, particle diameter and sphere diameter.
          
    Implications of the present results are discussed for simulations reported in the literature in which the Brownian step size was chosen equal to the sphere diameter.
          
    This method allows testing separately the distinct influences of parameters like soot volume fraction, sphere diameter, optical path length or aggregate shape.
          
    更多          
      spherical diameter
    The equivalent spherical diameter (ESD) of the coated Pd metal particles is estimated to be 50.
          
    Minimal threshold concentrations for feeding were found, depending on the size of the food offered and ranging from 5.8 μgC I-1 for Lauderia borealis (28.7 μm spherical diameter) to 47.1 μgC 1-1 for Chlamydomonas sp.
          
    On a cruise from 19-29 April, 1979, clearance rates were estimated by monitoring the decrease in concentration of particles with a multi-channel Coulter Counter TA II over a particle size range of 2 to 32 μm equivalent spherical diameter (E.S.D.).
          
    We measured in situ settling velocities of 49 to 190 m d-1 and calculated porosities of 0.99931 to 0.99984 (±>amp;gt;0.03%) for 12, newly-formed diatom flocs ranging from 0.19 to 4.2 cm3 in volume and 7 to 22 mm in equivalent spherical diameter.
          
    Nanociliates (>amp;lt;20μm equivalent spherical diameter, ESD) dominated abundance, but microciliates (>amp;gt; 20μm ESD) dominated biomass.Strombidium, Strobilidium, Tontonia andLaboea species were conspicuous taxa.
          
    更多          
      ball size
    The extent of the lesion may be influenced by the change of both the ball size and the posture of animals.
          
    A method for calculating load distribution over rolling bodies depending on their position relative to the load vector and the bearing ball size is presented.
          
    With regard to hand aperture, there was an effect of ball size, with the hand being opened to a wider aperture for each increase in ball size.
          
    In a series of experiments we manipulated a local (ball size) and a global (focus of expansion) component of the visual flow but also the egocentric orientation of the ball.
          
    With metal-on-metal bearings, the volumetric wear has been reduced 20-100 times from those with polyethylene, and there is no penalty for the large ball size.
          
    更多          


    In this paper the influence of Pr number, shape and thermal conductivity of the packing material and the bed height on the heat transfer coefficients of the packed beds have been thoroughly studied when air and water were cooled through packed tubes. In order to offer the data for the design of fixed bed, catalytic reactors and packed heat exchangers operated at high space velocity, high Re number was adopted.

    填充床层之传热系数包括二重阻力,即床层内部的传热阻力和床层与管壁界面间薄膜的传热阻力。本文以空气和水为传热介质,使其流过填充床层冷却,改变操作条件和床层构造,考察了Pr准数,床层高度、填充物的导热系数和形状对於传热系数的影响。由於高速固定床接触反应器和填充热交换器逐渐在工业上取得了应用,高线速下的传热数据需要迫切,因此试验的范围采用了较大的Re准数。 玻璃或磁质等低导热系数球状填充物的传热系数可归纳成: 试验范围: D_p/D_t=0.08~0.5; L/D_t=10~30; Re=250~6500; Pr=0.722~4.8 铜、铁等高导热系数球状填充物的传热系数可归纳成: 试验范围; D_p/D_t=0.1~0.5; Re=300~10,000;   L/D_t=10~30 在此范围内所有试验皆经过二次以上的重复试验,误差一般不大於5%。 以圆柱体为填充物的传热系数,仅须将修正Re准数中的几何量D_p,改成与圆球具有相同的几何表面面积的球径D'_p即可。 以上二式说明流体的物理性质即Pr准数对传热系数的影响不很显著,床层高度对传热系数的影响:低...

    填充床层之传热系数包括二重阻力,即床层内部的传热阻力和床层与管壁界面间薄膜的传热阻力。本文以空气和水为传热介质,使其流过填充床层冷却,改变操作条件和床层构造,考察了Pr准数,床层高度、填充物的导热系数和形状对於传热系数的影响。由於高速固定床接触反应器和填充热交换器逐渐在工业上取得了应用,高线速下的传热数据需要迫切,因此试验的范围采用了较大的Re准数。 玻璃或磁质等低导热系数球状填充物的传热系数可归纳成: 试验范围: D_p/D_t=0.08~0.5; L/D_t=10~30; Re=250~6500; Pr=0.722~4.8 铜、铁等高导热系数球状填充物的传热系数可归纳成: 试验范围; D_p/D_t=0.1~0.5; Re=300~10,000;   L/D_t=10~30 在此范围内所有试验皆经过二次以上的重复试验,误差一般不大於5%。 以圆柱体为填充物的传热系数,仅须将修正Re准数中的几何量D_p,改成与圆球具有相同的几何表面面积的球径D'_p即可。 以上二式说明流体的物理性质即Pr准数对传热系数的影响不很显著,床层高度对传热系数的影响:低导热系数填充物的传热系数随L/D_t比率之减小而逐渐增大,L/D_t>30,影响甚微,L/D_t=20,误差约7%,L/D_t=10,误差可达15%;高导热系数填充物的传热系数随L/D_t的增大略有增大的趋势,但影响?

    The present article deals with the important morphological characters of the eggs, larvae and metamorphosed fries of two flat fishes, Paralichthys olivaceus (T. & S.) and Zebrias zebra (Bloch), based mainly upon the living specimens reared successfully in our laboratory since 1959. Besides, the diagonostic characteristics for the identification of the eggs of P. olvaceus, the characteristics common to the eggs and larvae of the genera Paralichthys, important characters of the eggs and larvae of Zebrias zebra,...

    The present article deals with the important morphological characters of the eggs, larvae and metamorphosed fries of two flat fishes, Paralichthys olivaceus (T. & S.) and Zebrias zebra (Bloch), based mainly upon the living specimens reared successfully in our laboratory since 1959. Besides, the diagonostic characteristics for the identification of the eggs of P. olvaceus, the characteristics common to the eggs and larvae of the genera Paralichthys, important characters of the eggs and larvae of Zebrias zebra, and the relationships between the eye and the anterior end of the dorsal fin in P. olivaceus and in Zebrias zebra during the migration of the eye are discussed.

    本文主要根据1959年以来在实验室内饲养的活材料,对牙鲆(鲆科)和条鳎(鳎科)两种鲽形目鱼类卵子及仔、稚鱼各种重要阶段的形态特征作了描述,以供鉴定之用。这两种鱼类仔鱼变态期和条鳎卵的详细形态特征均未见记载。 1.牙鲆 卵浮性,呈圆球形;卵膜光滑,无粘性;卵黄均匀。卵径0.83—1.10毫米,生殖初期的最大。油球一个,球径.0.15—0.22毫米,也是初期最大。胚体、鳍褶和卵黄囊上的色素分布广而分散。初孵仔鱼全长2.07—2.44毫米;肌节12(13)+26,体部及鳍褶上色素分散,21对肌节以后的鳍褶上没有色素。仔鱼时期背、臀鳍褶边缘出现扫帚状黄、黑色素。仔、稚鱼无鳔;其鳍前端的6—7根鳍条首先发育,形成冠状幼鳍。全长12.7—14.6毫米(孵化后约30天)、右眼转过头顶时,鳍式巳与成鱼完全一致;此时稚鱼已由水平游泳转变为底层活动。全长14.0毫米以上时(孵化后约35天),右眼已完全转到左侧(有眼侧);全长达到20.3—25.5毫米(约孵化后42—45天)时,鳞片完全长出。 2.条鳎 卵子也是浮性、圆球形的。卵径为1.45—1.68毫米。油球小而多,10—60个左右。胚体上黄色素极多。卵膜无粘性,有...

    本文主要根据1959年以来在实验室内饲养的活材料,对牙鲆(鲆科)和条鳎(鳎科)两种鲽形目鱼类卵子及仔、稚鱼各种重要阶段的形态特征作了描述,以供鉴定之用。这两种鱼类仔鱼变态期和条鳎卵的详细形态特征均未见记载。 1.牙鲆 卵浮性,呈圆球形;卵膜光滑,无粘性;卵黄均匀。卵径0.83—1.10毫米,生殖初期的最大。油球一个,球径.0.15—0.22毫米,也是初期最大。胚体、鳍褶和卵黄囊上的色素分布广而分散。初孵仔鱼全长2.07—2.44毫米;肌节12(13)+26,体部及鳍褶上色素分散,21对肌节以后的鳍褶上没有色素。仔鱼时期背、臀鳍褶边缘出现扫帚状黄、黑色素。仔、稚鱼无鳔;其鳍前端的6—7根鳍条首先发育,形成冠状幼鳍。全长12.7—14.6毫米(孵化后约30天)、右眼转过头顶时,鳍式巳与成鱼完全一致;此时稚鱼已由水平游泳转变为底层活动。全长14.0毫米以上时(孵化后约35天),右眼已完全转到左侧(有眼侧);全长达到20.3—25.5毫米(约孵化后42—45天)时,鳞片完全长出。 2.条鳎 卵子也是浮性、圆球形的。卵径为1.45—1.68毫米。油球小而多,10—60个左右。胚体上黄色素极多。卵膜无粘性,有很大的六角形网纹,其对角距为0.17—0.20毫米。初孵仔鱼全长3.5毫米,肌节10+44。孵化后3—4天,在背鳍褶上出现2—3个峯状色素斑;消化道前端的背侧

    The endurance of rare earth-magnesium nodular cast iron to fracture under static and dynamic loads is shown to be more accurately represented by the parameters of fracture mechanics rather than by impact toughness. Parameters such as K_(Ic), da/dN and AK_(th) are represented. With a view to clarifying the effect of various metallographic structures upon the fracture toughness of the material, the rate of spheroidization, the morphology of graphite, the size of spherulites, the matrix structure, etc. were separately...

    The endurance of rare earth-magnesium nodular cast iron to fracture under static and dynamic loads is shown to be more accurately represented by the parameters of fracture mechanics rather than by impact toughness. Parameters such as K_(Ic), da/dN and AK_(th) are represented. With a view to clarifying the effect of various metallographic structures upon the fracture toughness of the material, the rate of spheroidization, the morphology of graphite, the size of spherulites, the matrix structure, etc. were separately examined. At the same time, crack propagation characteristics for different stages of fatigue fracture were also investigated. It is recommended that nodular cast iron could be in greater strength and better toughness provided that its microstructure is improved.

    本文指出,用断裂力学参数代替冲击韧性更能正确反映球铁承受静、动载荷抗断能力。介绍了稀土镁球铁K_(Ic),da/dN,△K_(th)等参数的测定方法和特点,研究了金相组织如球化率、石墨形态、球径、基体组织等对球铁断裂韧性的影响,对强韧球铁应具有的冶金结构进行了探讨。同时,对疲劳断裂过程各个阶段的裂纹扩展特性进行了观察。作者认为,改善球铁的金相组织有可能在强度和韧性方面出现较大突破。

     
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