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原始密度
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  “原始密度”译为未确定词的双语例句
     The C/C-SiC composites have relatively high stationary friction coefficient. The sample whose preform density is1.47g/cm3 is suitable to be used as braking materials.
     C/C-SiC复合材料有比较高的静摩擦系数,几组试样中预制体原始密度为1.47g/cm3的材料较适合作为刹车材料使用。
     (2) The change trend of wood density along radial direction for two species were same: mature wood >juvenile wood > overmature wood. The difference in three density between juvenile and mature Larch wood as well as between mature wood and overmature wood reached 0.01 level of significance.
     (2) 两种木材的原始密度、气干密度和全干密度沿径向的变化趋势一致,均为成熟材>幼龄材>过熟材,其中落叶松木材的三项密度在幼龄材与成熟材之间以及成熟材与过熟材之间均达0.01水平差异显著。
短句来源
     This means it is time for thinning. It is not reasonable to calaulate the thinning strength by original density, so it is determined by the different amounts of remaining trees. During production we check the number of remaining trees with a tabled on the improved B. E.
     杨桦次生林的间伐强度,不宜用原始密度计算,我们用不同保留株数确定,间伐生产中保留株数,我们用改进的B.E.
短句来源
     The effects of the initial stoichiometry, initial density, particle size of silicon, and initial temperature on the spin combustion process were studied mainly in Ni-Si system. In Ti-Ni system, the effects of preheating temperature and initial stoichiometry of compact on combustion process and mode were studied.
     主要研究了Ni Si系统中原始化学配比、坯体的原始密度、硅颗粒尺寸及起始温度对螺旋燃烧工艺的影响以及Ti Ni系统中预热温度及原始化学配比对燃烧工艺及模式的影响。
短句来源
     The C/C-SiC composites have relatively high stationary friction coefficient. The sample whose preform density is 1.47g/cm3 is suitable to be used as braking materials.
     C/C-SiC复合材料有比较高的静摩擦系数,几组试样中预制体原始密度为1.47g/cm3的材料较适合作为刹车材料使用。
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  相似匹配句对
     Density of utility.
     效用密度
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     f mutated by nitrous acid, the bio-activity of the bacterium T.
     f菌和原始T .
短句来源
     The line density and area density have been counted.
     区的密度
短句来源
     Relativity Between Acoustic Densitometry of Ultrasonography and Original Myocardial Radio Frequency Signal
     联机声学密度定量与心肌原始射频信号强度的相关性
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     atreme. A is relatively primitive.
     A是较原始的 .
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  ordinary density
The physical reason for such a sharp change in the magnetoabsorption coefficient as compared with the expected result for the ordinary density of states in a quantizing magnetic field is that the electronic excitations are quasi-one-dimensional.
      
The iterative scheme shows how, in practice, density estimation from indirect observations may be performed by simply correcting an appropriate ordinary density estimator.
      
Instead, the liquid plasma model simply requires a very ordinary density throughout the body of the Sun.
      
  absolute density
The growth exponent for the minority is related to its absolute density and temperature because of its small density.
      
We present systematic studies on the absolute density of hydrogen cluster beams produced by using Laval-nozzles.
      
It is assumed that, for those prey animals whose percentage in the total prey of a predator is fairly high, the percentage proportionally approximates the real fluctuations in their (absolute) density.
      
Our results clearly demonstrate that absolute density is a poor predictor of roe deer performance and supports the view that habitat quality has an overwhelming importance for determining fawn body mass in roe deer populations.
      
In three patients with chronic obstructive pulmonary disease and in one healthy subject, absolute density of selected lung regions was measured in the supine position by the Compton scatter technique.
      
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The total work of compaction of powders, from zero strain(ε= 0) to in-finite strain (ε= ∞), is derived in this paper to be: a_(total)= Mw (1/d_0-1/d_m) Γ(m + 1)where M is the modulus of compaction of powder, w is the weight of powder,d_0 is the initial density of powder, d_m is the theoretical density of densemetal, m is the index of non-linearity and Γ(m + 1) is the gamma functionof (m + 1). Γ(m + 1) = ∫_0~∞ e~(-8)ε~mdεwhere ε is the strain of compaction, ε=ln((d_m-d_0)d)/((d_m-d)d_0)and d is the green density...

The total work of compaction of powders, from zero strain(ε= 0) to in-finite strain (ε= ∞), is derived in this paper to be: a_(total)= Mw (1/d_0-1/d_m) Γ(m + 1)where M is the modulus of compaction of powder, w is the weight of powder,d_0 is the initial density of powder, d_m is the theoretical density of densemetal, m is the index of non-linearity and Γ(m + 1) is the gamma functionof (m + 1). Γ(m + 1) = ∫_0~∞ e~(-8)ε~mdεwhere ε is the strain of compaction, ε=ln((d_m-d_0)d)/((d_m-d)d_0)and d is the green density of powder compact.The actual work of compaction of powders from ε_1 to ε_2 is derived to be: a = Mw (1/d_0-1/d_m)∫ε_1ε~2 e~(-ε)ε~mdεwhere ∫_(ε_1)~(ε_2)e~(-ε)ε~mdεis the incomplete gamma function of (m + 1), the numer-ical value of which can be evaluated by computers. Examples of calculations for the work of compaction on tungsten powderare given and tabulated.

本文导出了粉体从应变为0(ε=0)到应变无穷大(ε=∞)时的压制总功: α_总=MW(1/d_o-1/d_m)Γ(m+1)式中,M是粉末压制模量,W是粉末的重量,d_o是粉末的原始密度,d_m是致密金属的理论密度,Γ(m+1)是m+1的Γ函数, Γ(m+1)=∫_0~ ∞e~(-ε)ε~mdεε是压制应变, ε=ln(d_m-d_o)d/(d_m-d)d_od是压坯密度,m是非线性指数。还导出了应变从ε_1到ε_2时实际的粉末压制功, α=∫_(ε_1)~(ε_2)e~(-ε)ε~mdε式中,∫_(ε_1)~(ε_2)e~(-ε)ε~mdε是m+1的不完全Γ函数,其函数值可由电子计算机近似求得。文中列表给出了钨粉压制功的计算实例。

The principle of density method for determining the creep damage is based on the creep occuring in metal in the form of voids thus reducing the density of rhe metal. The first density of 12Cr1MoV steel relates to the early stage structure of the initial pipe. The form, dimension and quantity of voids are observed, and the change of density ratio(expressed in percentage) is obtained in different stage of creep. Then the remainder of the service life of the pipe is estmated. If the ratio exceeds 0.2 percent, the...

The principle of density method for determining the creep damage is based on the creep occuring in metal in the form of voids thus reducing the density of rhe metal. The first density of 12Cr1MoV steel relates to the early stage structure of the initial pipe. The form, dimension and quantity of voids are observed, and the change of density ratio(expressed in percentage) is obtained in different stage of creep. Then the remainder of the service life of the pipe is estmated. If the ratio exceeds 0.2 percent, the pipe should be changed. This method is simple and efficicient.

密度法测定蠕变损伤的原理是根据金属中蠕变损伤产生微孔使得密度下降。蠕变损伤积累和钢的相对密度变化△ρ/ρ0%是一致的。当△ρ/ρ0%<0.3%时损伤是均匀的,密度法与定量金相法的结果相同。12CrlMoV钢原始密度ρ0值和管子的原始组织有关。在不同蠕变阶段分析微孔的形态、大小和数量以及密度变化△ρ/ρ0%,得到管道的剩余寿命,并确定管子的退役依据。如钢中产生微孔链并且△ρ/ρ0%达0.2%,管子就要尽快地更换。密度法对于监督火电厂主蒸汽管道是十分简便而有效的。

Under an ideal roll-condition,the friction-coefficient of dense metals can be calculated by the formula as μ=a/2[1-(4S_nh/Δh)~(1/2) ]~(-1) ,where a is the critical angle of nip,S_n the forward slip determined experimentally and Δh the rolling reduction.Based on the mass constancy of the porous metal under deformation,in this paper,a modified formula for calculating the μ has been proposed,given by μ=a/2[1-(4(S_n+1-K)/KΔh)~(1/2) ]~(-1) ,where K is a modified index taking dinsification into account.The latter...

Under an ideal roll-condition,the friction-coefficient of dense metals can be calculated by the formula as μ=a/2[1-(4S_nh/Δh)~(1/2) ]~(-1) ,where a is the critical angle of nip,S_n the forward slip determined experimentally and Δh the rolling reduction.Based on the mass constancy of the porous metal under deformation,in this paper,a modified formula for calculating the μ has been proposed,given by μ=a/2[1-(4(S_n+1-K)/KΔh)~(1/2) ]~(-1) ,where K is a modified index taking dinsification into account.The latter formula may be considered as an universal for it would be the same as the former(here K exactly becomes 1) when used to the dense metals.The values of forward slip were measured experimentally on copper powder

致密金属在理想轧制条件下.摩擦系数可由下式确定:μ=α/2[1-(4S_nh/Δh)~(1/2) ]~(-1) ,α是临界咬入角,S_n 是由实验测定的前滑值。Δh 为轧制压下量。本文根据有孔金属变形质量不变的原理,对上式进行修正,得到计算摩擦系数的新公式:μ=α/2[1-(4(S_n+1-K)h/KΔh)~(1/2) ]~(-1) ,K 是考虑:致密化的修正系数,它等于有孔金属轧制时,对应中性角的板坯密度与轧制带材的最终密度之比。该式也适用于致密金属轧制(K=1) ,因而是一个普遍公式。实验测定铜粉烧结坯冷轧的前滑值是随轧制板坯的原始密度增大而增大;按上式计算的摩擦系数则随轧带的密度增大而减小。

 
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