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密度计算
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  density calculation
     EXPERIMENTAL VERIFICATION AND COMPARISON OF THREE AXIS DENSITY CALCULATION FORMULAS
     三个轴密度计算公式的实验验证和比较
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     A METHOD OF MUD DENSITY CALCULATION FOR BOREHOLE CONTRACTION CONTROL IN ROCK SALT DRILLING
     控制盐层井眼收缩速率的泥浆密度计算方法(UP法)
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     DENSITY CALCULATION AND CALIBRATION OF COMPENSATED DENSITY TOOL
     补偿密度测井仪的刻度与密度计算
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     Then, by a comprehensive consideration of the influence of steam state equation, surface tension and water density calculation method on the calculation of liquid droplet critical radius a specific mode for calculatiing liquid droplet critical radius under a supersaturation state was developed.
     然后综合考虑了水蒸气状态方程、表面张力计算方法和水的密度计算方法对计算临界液滴半径的影响,进而得出了计算过饱和状态下临界液滴半径的具体形式。
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     Plasma density calculation based on the HCN waveform data
     基于HCN波形数据的等离子体密度计算方法
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  density calculating
     MULTIPLE FLUX ROPE EVENTS AT THE HIGH-LATITUDE MAGNETOPAUSE ON JANUARY 26, 2001:CURRENT DENSITY CALCULATING
     2001年1月26日高纬磁层顶通量管事件的观测研究——空间电流密度计算及分析
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     To this kind of machine, the air-gap magnetic flux density distribution along the circumference and axes length is studied respectively. As a result, the equivalent magnetic flux leakage coefficient and the equivalent air-gap magnetic flux density calculating coefficient, which are important for the motor design, are put forward and calculated.
     分别对其气隙磁通密度沿周向和轴向的分布进行了分析研究 ,提出了该种电动机所特有的等效漏磁系数和等效气隙磁通密度计算系数的概念和计算方法 .
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  density and calculate
     Methods The corn poison bait of 0.005%bromadiolone was put for 4 d, the 100 division powder board was used to determine the rat density and calculate the rate of deratization and the rebounding rate of rat density.
     方法采用饱和投毒法,0.005%溴敌隆玉米毒饵连投4d,用100格粉板法测定鼠密度,计算灭鼠率和鼠密度回升率。
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     And using the powder trace method to determine the field rat density and calculate the deratization effect.
     用粉迹法测定现场鼠密度,计算校正灭鼠率。
短句来源
     Methods The group feeding method wa s used to determine the palatability of the poison bait and the laboratory derat ization effect. And the powder trace method was used to determine the field rat density and calculate the deratization effect.
     方法 用群饲养有选择给饵法测定毒饵的适口性及实验室灭鼠效果,用粉迹法测定现场鼠密度,计算灭鼠率。
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  “密度计算”译为未确定词的双语例句
     Study on the Calculation of Density of Na~+,K~+,Mg~(++),Ca~(++)∥Cl~--H_2O System
     Na~+,K~+,Mg~(++),Ca~(++)∥Cl~--H_2O体系溶液密度计算研究
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     Calculation on Density of States and Electrochemical Performance of Li_xNi_(0.5)Co_(0.5)O_2
     Li_xNi_(0.5)Co_(0.5)O_2的态密度计算及电化学性能研究
短句来源
     Calculation of electron density on γ-Fe(111),Co(0001),Ni(111),C(0001) crystal plane and valence electron structure analysis of catalyst action
     γ-Fe(111),Co(0001),Ni(111),C(0001)晶面电子密度计算及触媒作用优劣的价电子结构分析
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     The density of the solutions for three types of inorganic salts, which are of ion structures of A(Ⅰ)B(Ⅰ),A(Ⅰ) 2B(Ⅱ),A(Ⅱ)B(Ⅰ) 2, has been discussed.
     探讨了3种离子构型[A(Ⅰ)B(Ⅰ),A(Ⅰ)2B(Ⅱ)和A(Ⅱ)B(Ⅰ)2型]无机盐溶液的密度计算方法。
短句来源
     The longstanding discrepancy between theoretical calculations and experimental data in K +- 6 Li elastic scattering may be improved in the framework of Glauber theory, concerning the relatively loosely bound nuclear density distribution.
     在 Glauber理论框架下 ,考虑了 6Li核束缚相对松散的核密度 ,计算了 K+-6Li弹性散射截面比 RT,改进了理论计算和实验数据长期存在的偏差 ,这表明本文对 6Li核密度分布“长尾巴”的特殊考虑是必要的 .
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  density calculation
A summary of the experimentalE(K) data for both the conduction and valence bands in Ag is given and compared with a recent local density calculation.
      
Single particle wavefunctions determined from a local density calculation of the C60 and KC60 ground states are used for evaluation of microscopic wavelength dependent polarizabilities and absorption spectrum with a sum-over-states approach.
      
The charge density calculation by MNDO method shows that in the pyrimidine ring of arylazopyrimidine, the peripheral m-N(uncoordinated) carries a high negative charge which may retard the nucleophilic association rate.
      
The uncertainty in density calculation of the present equation of state is 0.7% in the liquid phase, and that in pressure calculation is 0.3% in the vapor phase.
      
Electron Density Calculation Using the Contact Block Reduction Method
      
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The crystal structure of sodium tetraselenite has a monoclinic unit cell with a=5.90A, b=4.82A, c=10.19A, β = 91°20', which contains 2 {NaH3(SeO2)2}. The space group is Gs2-Pn.The equatorial Weissenberg photograph h0l indicates that the projection of the structure onto the plane (010) has a pseudo plane group p6m and a pseudo unit cell with a' = 5.94A, b'=5.90A, r' = 119°50'. The pseudo plane group helped to fix the selenium and sodium atoms in the projection (Figure 1) and the Patterson projectionP(v, w) gave...

The crystal structure of sodium tetraselenite has a monoclinic unit cell with a=5.90A, b=4.82A, c=10.19A, β = 91°20', which contains 2 {NaH3(SeO2)2}. The space group is Gs2-Pn.The equatorial Weissenberg photograph h0l indicates that the projection of the structure onto the plane (010) has a pseudo plane group p6m and a pseudo unit cell with a' = 5.94A, b'=5.90A, r' = 119°50'. The pseudo plane group helped to fix the selenium and sodium atoms in the projection (Figure 1) and the Patterson projectionP(v, w) gave the values of their y coordinates. Then, the selenium and sodium atomswere seen to be distributed according to the space group C2h5 - P21/m. The oxygenatoms were located by a modified Fourier method. The Fourier projections p(x,z) and p(y, 2) (Figure 2 and 3) confirm the structure (Table 2 and Figure 4) satisfactorily.The pyramidal molecule SeO(OH)2 and ion [SeO2(OH)]- in the crystal correspond to the symmetrical structure formulaerespectively, where Se-OH = 1.75-1.82A and Se = O = 1.66-1.69A (Figure 5). The molecules SeO(OH)2 and ions [SeO2(OH)]- are linked through the hydrogen bonds O-H…O = 2.46-2.83A to form infinite chains of composition H3(SeO3)2 (Figure 6) and these chains are held together laterally by the sodium ions between them. The sodium ions are coordinated octahedrally by oxygen atoms (Figure 7).

单斜晶体NaH_3(SeO_3)_2的晶胞参数为α=5.90(?),b=4.82(?),c=10.19(?),β=91°20′。晶胞中含有2{NaH_3(SeO_3)_2}。密度的计算值和观测值各为3.22_4和3.21±0.01克/厘米~3。根据系统消光,晶体结构中存在着滑移面n。最后根据全部原子的坐标值肯定晶体的空间群为C_3~2—Pn。 根据Weissenberg图hOl上各衍射点的分布情况,可为结构在(010)面上的投影引出一个a′=5.94(?),b′=5.90(?),γ′=119°50′的假六方单位,投影的假二维空间群为p6m。假六方单位的a′=1/2(c-α),b′=α如图1中所示。Patterson投影P(u,w)肯定了图1中Se和Na原子的x,z坐标,而P(v,w)给出了它们的y坐标。从这些坐标值看来,晶体中的Se和Na原子系按空间群C_(2h)~5-P2_1/n分布。依靠上述重原子的坐标值并按空间群C_2h~5计算了电子密度分布函数ρ(x,z)和ρ(y,z)。计算结果指出,晶胞中的O原子系按空间群C_3~2分布。最后按空间群C_3~2对上述电子密度分布函数逐步进行修改,使O原子有了明确的表...

单斜晶体NaH_3(SeO_3)_2的晶胞参数为α=5.90(?),b=4.82(?),c=10.19(?),β=91°20′。晶胞中含有2{NaH_3(SeO_3)_2}。密度的计算值和观测值各为3.22_4和3.21±0.01克/厘米~3。根据系统消光,晶体结构中存在着滑移面n。最后根据全部原子的坐标值肯定晶体的空间群为C_3~2—Pn。 根据Weissenberg图hOl上各衍射点的分布情况,可为结构在(010)面上的投影引出一个a′=5.94(?),b′=5.90(?),γ′=119°50′的假六方单位,投影的假二维空间群为p6m。假六方单位的a′=1/2(c-α),b′=α如图1中所示。Patterson投影P(u,w)肯定了图1中Se和Na原子的x,z坐标,而P(v,w)给出了它们的y坐标。从这些坐标值看来,晶体中的Se和Na原子系按空间群C_(2h)~5-P2_1/n分布。依靠上述重原子的坐标值并按空间群C_2h~5计算了电子密度分布函数ρ(x,z)和ρ(y,z)。计算结果指出,晶胞中的O原子系按空间群C_3~2分布。最后按空间群C_3~2对上述电子密度分布函数逐步进行修改,使O原子有了明确的表现,并取得了图2和图3中的结果。晶胞中各原子的坐标值按空间群C_3~2列于表2中。晶体结构示出于图4中。 晶体中三角锥形的分子SeO(OH)_2和离子[SeO_2(OH)]各相当于对称结构式 其中Se—OH=1.75—1.82(?),Se=O=1.66—1.69(?)(图5)。分子SeO(OH)_2和离子[SeO_2(

An X-ray examination of the reddish-brown coloured rhombohedral crystals of the tris-thiourea complex of molybdenum(Ⅲ) chloride MoCl3tu3 (tu=CS(NH2)2) gives the following crystallographic duta: a=8 .78A. c=17.56A, containing 3 MoCl3tu3 per unit cell (pobs=1.83 g/cm3. Pcnlc=1 .73 g/cm3), and belonging to the space group C34-R3. On the basis of the Patterson projection P0 (u. w) we have been able to determine the structure of this non-centro--symmetrical crystal with R=18% for the (hol) diffraction data In this...

An X-ray examination of the reddish-brown coloured rhombohedral crystals of the tris-thiourea complex of molybdenum(Ⅲ) chloride MoCl3tu3 (tu=CS(NH2)2) gives the following crystallographic duta: a=8 .78A. c=17.56A, containing 3 MoCl3tu3 per unit cell (pobs=1.83 g/cm3. Pcnlc=1 .73 g/cm3), and belonging to the space group C34-R3. On the basis of the Patterson projection P0 (u. w) we have been able to determine the structure of this non-centro--symmetrical crystal with R=18% for the (hol) diffraction data In this crystal each Mo atom is octahedrally linked with 3 Cl ions and 3 thiourea S atomt. arranged in the cis manner so as to meet the 3-jold requirement of the crystallographic symmetry. The relevant bond lengths and bond angles are as follows: Mo-Cl 2.40A Mo-S 2,44A.

我们应用单晶X射线衍射方法研究了Mo(tu)3Cl3的晶体结构。晶体的空间群为C34-R3;单胞参数力:a=8.78A,C=17.56A。晶体的密度用排量法测得为 1.83g/cm3,单胞内含有三个Mo(tu)3Cl3(密度计算值为1.83g/cm3)。结构的测定主要是通过Patterson投影和电子密度投影的计算来解决的。研究结构表明,在Mo(tu)3Cl3分子中,MO原子和三个Cl原子、三个硫脲的S原子直接配位,这六个原子按顺式排布在八面体的顶点上,因此分子具有三次轴的对称性,而整个晶体是由一层一层的分子所构成的。

After various formulae used to calculate economic current density ofaluminum busbars having been discussed, this paper points out that there isnot yet such an idea of profitability in capital cost on the prevailingcalculations at home, thus giving rise to a waste of capital cost about 60%.Moreover, all the relevant formulae above mentioned have not taken theitem of floating capital into account so far, and an increase of loss by 8%should be caused. Hence, a modified formula is deduced as follows D_b=(dq/(ρTk(1+nb/(365)))((q-q_c)/(Nq)+b))~(1/2)...

After various formulae used to calculate economic current density ofaluminum busbars having been discussed, this paper points out that there isnot yet such an idea of profitability in capital cost on the prevailingcalculations at home, thus giving rise to a waste of capital cost about 60%.Moreover, all the relevant formulae above mentioned have not taken theitem of floating capital into account so far, and an increase of loss by 8%should be caused. Hence, a modified formula is deduced as follows D_b=(dq/(ρTk(1+nb/(365)))((q-q_c)/(Nq)+b))~(1/2) A/mm~/Under the condition of our country, value of D_b calculated are 0.30-0.36A/mm~2. This paper suggests further that the point of minimum cost isnot the optimum control condition. The general formula for optimum controlcondition may be dQ/(dZ)= -Bwhere B the profitability of the total capital for enterprises of same kind.

本文分析了国内外母线经济电流密度的计算公式指出,对我国影响最广的算法中没有资金收益率概 念。这将会造成2/3的投资浪费。还指出,迄今为止的所有公式中都没把流动资金计入在内,这将增 加8%的消耗损失。本文导出下列公式计算母线经济电流密度: D_b=(dq/ρTk(1+n·b/365)(q-q_c/Nq+b))~(1/2) A/mm~2 结合我国情况计算了D_b ,约为0.30—0.36A/mm~2。 本文还指出成本极小值不是最佳控制条件,提出下式为最佳控制基本公式: dQ/dZ=-B B为同类企业总资金收益率。

 
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