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β-方法
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  beta method
beta method of approximating the clearance as the product of volume of distribution and beta is considered for comparison.
      
beta method which assumes a single exponential disposition kinetics leads to excessive errors when applied in absolute clearance comparisons.
      


Through graphical investigation of Soviet coal and Chinese coal, the follow-ing important conclusions are obtained. (1) The inadequacy of old coal classification methods is discussed and anentirely new method of coal classification with volatile matter on combustiblebasis as abssicca and the coal characteristic coefficient β=2.35((H~P-0.126O~P+0.04N~P)/(C~P+0.375S_?~Pas ordinate is proposed, The graphical charts show perfectly satisfactory withthe different kinds of coal located in perfectly distinct areas of...

Through graphical investigation of Soviet coal and Chinese coal, the follow-ing important conclusions are obtained. (1) The inadequacy of old coal classification methods is discussed and anentirely new method of coal classification with volatile matter on combustiblebasis as abssicca and the coal characteristic coefficient β=2.35((H~P-0.126O~P+0.04N~P)/(C~P+0.375S_?~Pas ordinate is proposed, The graphical charts show perfectly satisfactory withthe different kinds of coal located in perfectly distinct areas of classification.Thus the detailed classification which the old methods fail to give out, is perfectlypossible with the new method. (2) The ultimate composition of coal on combustible basis, like C~2, 0~2, H~2,N~2 and the analytical moisture, W~a and their variation with the volatile matteron combustible basis and with each other is graphically investigated and it isfound that their variation with each other proceeded with distinct regularitywith the exception of sulphur and ash, so that their composition percentage canbe approximatety estimated with rough accuracy through these graphs and theclose check of analytical results of ultimate composition can be carried outthrough the use of these graphs. (3) a general relationship in the proximate and ultimate composition of the pure coal substance on combustible basis for typical Chinese coals can bederived with the following straight line formula for the average percentage of car-ben on combustible basis in terms of the volatile matter on combustible basisin the region of bituminous coal: C~2=93.3-(V~2/4.55) during (8

此文系用图解方法进行研究: (Ⅰ)煤的分类方法,以何种方法为最合适(图解图1—9); (Ⅱ)煤的成分变化是否有一定的规律,及其相互间是否有一定的关系(图解图10—20); (Ⅲ)煤的原素分析与实用分析间的关系(图解图21—23); (Ⅳ)煤的发热量的变化(图解图24—28); (Ⅴ)燃煤所需理论空气量、理论乾烟气量及湿烟气量的变化(图解图29—31)。原始资料系利用:(1)中国各地产煤实用分析; (2)中国东北区及华北区原素分析; (3)苏联全苏热工研究所公布的固体及液体燃料的计算特性数据; (4)英国及德国的数据。图解研究结果,得出结论: 1.新的煤分类方法,以纯燃质挥发物为分类基础而同时结合煤的特性系数β方法为最合适,或可认为近百年间国际间,对煤分类法的一个很重大的建议。 2.煤的成分变化,极有规律而成分间具有一定的关系。 3.煤的原素分析与实用分析间的关系,可用平均数值推演估计,而比较正确数据,可根据图解估计, 或可利用图解核对分析数据。 4.煤的发热量,即纯燃质氧弹发热量的变化极有规律,可用平均数据,利用近似公式推算,或按照肯定...

此文系用图解方法进行研究: (Ⅰ)煤的分类方法,以何种方法为最合适(图解图1—9); (Ⅱ)煤的成分变化是否有一定的规律,及其相互间是否有一定的关系(图解图10—20); (Ⅲ)煤的原素分析与实用分析间的关系(图解图21—23); (Ⅳ)煤的发热量的变化(图解图24—28); (Ⅴ)燃煤所需理论空气量、理论乾烟气量及湿烟气量的变化(图解图29—31)。原始资料系利用:(1)中国各地产煤实用分析; (2)中国东北区及华北区原素分析; (3)苏联全苏热工研究所公布的固体及液体燃料的计算特性数据; (4)英国及德国的数据。图解研究结果,得出结论: 1.新的煤分类方法,以纯燃质挥发物为分类基础而同时结合煤的特性系数β方法为最合适,或可认为近百年间国际间,对煤分类法的一个很重大的建议。 2.煤的成分变化,极有规律而成分间具有一定的关系。 3.煤的原素分析与实用分析间的关系,可用平均数值推演估计,而比较正确数据,可根据图解估计, 或可利用图解核对分析数据。 4.煤的发热量,即纯燃质氧弹发热量的变化极有规律,可用平均数据,利用近似公式推算,或按照肯定的煤的类别,根据图解来比较正确的估计,或利用图解核对试验的数据。 5.燃煤所需理论空气量,理论乾烟气量及湿烟气量均可用近似公式推算。

This paper describes the direct measurement of total bataactivity in water by use of liquid-scintillation counter.The integral spec-trum is extrapolated to zero discrimination threshold to obtain the totalbata activity.The detection efficiency for the radionuclides emitting β-rayswith a maximum of energy higher than 150 kew is approximately 100 percent.Both total bata activity and the estimated value of tritium concentra-tion can simultaneously be given in the measuring,which is not sensitiveto quenching effect....

This paper describes the direct measurement of total bataactivity in water by use of liquid-scintillation counter.The integral spec-trum is extrapolated to zero discrimination threshold to obtain the totalbata activity.The detection efficiency for the radionuclides emitting β-rayswith a maximum of energy higher than 150 kew is approximately 100 percent.Both total bata activity and the estimated value of tritium concentra-tion can simultaneously be given in the measuring,which is not sensitiveto quenching effect.

本文介绍了用液体闪烁计数器直接测量水中总β方法。该方法是将积分谱外推至零甄别阈处而得到总β放射性。对于 E_(βmax)>150千电子伏的β核素,其探测效率接近100%。此方法,一次测量可同时给出总β放射性和氚浓度的估算值,并且具有一定的抗猝灭效应的性能

By the multifunctional apparatus the measured thermophysical properties such as melting temperature,real specific heat,thermal conductivity and thermal diffusivity both in solid and liquid state and heat of fusion for seven phase change storage materials are reported in this paper.The thermostat-capillarimeter technique for measuring the volume expansion coeffecient of paraffin wax during phase transformation is also presented.It is observed that there is a relational expression between the enthalpy increment...

By the multifunctional apparatus the measured thermophysical properties such as melting temperature,real specific heat,thermal conductivity and thermal diffusivity both in solid and liquid state and heat of fusion for seven phase change storage materials are reported in this paper.The thermostat-capillarimeter technique for measuring the volume expansion coeffecient of paraffin wax during phase transformation is also presented.It is observed that there is a relational expression between the enthalpy increment and relative volume increment for paraffin wax.The propotionality factor for paraffin wax made in China is found to be 2500kJ/kg.

本文报道了用多功能热物性测定仪测定的石蜡等七种相变储热材料的t_f~*、γ、固相和液相的c_(ps)和c_(pl)、λ_s、λ_l、α_s、α_l。介绍了利用定温器——毛细管装置测定石蜡在相变过程中的体膨胀系数β方法。根据测定结果,找到了石蜡的c_p与β的比例关系,即在温度改变Δt时石蜡的焓增量ΔH与相对容积的增量Δ(?)之间的比例关系。所测国产石蜡的比例系数K为2500[千焦耳/千克]。

 
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