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Three kinds of mass attenuation coefficient have been used, which are the monoenergetic MAC at the mean energy of the MC simulated spectrum, the effective MAC of the Born approximation formula spectrum and the effective MAC of the MC simulated spectrum.

在密度提取中使用了3种不同的吸收系数-MC谱光子平均能量对应的单能质量吸收系数、波恩近似公式谱有效质量吸收系数和MC谱有效质量吸收系数。

Describes the composition and characteristics of ensure ordnance equipment ,analyzes the working process of value engineering in the period of the usage of ordnance equipment and shows the computing formula of quantified analyzing, ordnance equipment functional and cost coefficient.

阐述了军械装备使用保障费用的构成和特点,分析了价值工程在军械装备使用保障中的工作流程,给出了定量分析军械装备功能系数和成本系数的计算公式。

The article mostly discusses gas application burning excess air coefficient calculation methods, introduces different calculation formula application range, and giving examples in natural gas, liquefied petroleum gas and manufactured gas calculate its excess air coefficient on the same oxygen content of fuel gas, and the influences of excess air coefficient to air consumption and fuel gas production during burning process.

文章主要论述了燃气具燃烧过剩空气系数的计算方法,介绍了不同过剩空气系数计算公式的使用范围,并举例天然气、液化石油气和人工煤气三气种燃气具在测得烟气中相同氧含量时过剩空气系数的计算方法,以及过剩空气系数对燃气具在燃烧过程中消耗空气量和同时产生烟气量的影响。

The friction performances of carbon face were investigated with an inertia friction tester.The torque curve of carbon face was ideal,the coefficient of static friction was lower than that of dynamic in 0.28 MPa,the friction coefficient of static and dynamic decreased with the braking pressure increasing.To the fiber face,the coefficient of dynamic fric...

结果表明:碳质层的摩擦力矩在制动初期上升较快,中间过渡区平稳,尾部翘起较小;在制动压力小于0.28 MPa时静摩擦系数小于动摩擦系数,且动、静摩擦系数均随制动压力增加而减小;相对纤维层而言,采用碳质层摩擦时摩擦力矩曲线形态更好,连续制动时摩擦系数波动较小,磨损率低且能够有效保护偶件,是1种静/动摩擦系数比较低且适用于高载荷工况条件下使用的摩擦材料。

In our analyses andcalculations,the effects of impurities and defects on the growth process areattributed to a new effective surface tension which has different scalingbehavior from the original one,and the growth inhomogeneities are modeledby Delta function and screened Coulomb function,respectively.

在分析计算中,是通过引入新的有效表面张力系数,将杂质和缺陷对表面生长过程的影响归结为一个新的有效的表面张力系数,这个表面张力系数与原来的表面张力系数具有不同的标度行为,对非均一生长率则分别使用了Delta函数模型和屏蔽的库仑函数模型。

In order to obtain more general solution of second order linear differential equation with constant coefficients, which is important in theory and practice, on the basis of knowing a special of the second order linear differential equation with constant coefficients and by using the method of variation of constant, the second order linear differential equation with constant coefficients is transferred to the reduced differential equation and a general formula of the second order linear differential equation with constant coefficients is derived.

为了更多地得到理论上和应用上占有重要地位的二阶常系数线性非齐次微分方程的通解,这里使用常数变易法,在先求得二阶常系数线性齐次微分方程一个特解的情况下,将二阶常系数线性非齐次微分方程转化为可降阶的微分方程,从而给出了一种运算量较小的二阶常系数线性非齐次微分方程通解的一般公式,并且将通解公式进行了推广,实例证明该方法是可行的。

Wavelength calibration coefficients were calculated through regression analysis after several ordinal numbers of CCD's pixels corresponding to Mercury-Argon Lamp's spectral lines were measured. The residuals of certain spectral lines were computed using the coefficients measured and the ones from factory, the degree of fitting for regression equation was estimated using the new coefficients. The final results validated the wavelength calibration model.

在测量了多条光谱线对应的CCD像元的序数之后,使用回归分析得到波长定标的系数,连同光谱仪出厂时的波长定标系数,计算出了两组定标系数在给定的一些谱线位置处的残差,并利用实验所得的系数对回归方程进行了拟合优度检验,结果表明波长定标模型是有效的。

The yield of 〓-methoxyl or m-nitrocinnamic acids obtained from methoxycarbonylmethylenephosphonates and corresponding substituted benzaldehydes in the presence of is 11% or 13% higher than that obtained from those reactions without catalyst.

〓 [注:表中ρ、〓和C为式(2-5)中的相应系数和常数;γ为相关系数,F为F比值,〓为相应系数ρ、〓和C的偏差,〓和〓为相应系数的T检验,CL为置信水平,n为相关点数。表听数据系使用BJORK'S(1967)程序于Z-80计算机上计算结果。]

Secondly, the author has researched the wavelet coefficients distribution property based on the histgram of detail subimages, and proposed an adaptive image quantization algorithm according to local data distribution in every subimage. In this quantization procession, every subimage will be disparted to some sub-blocks, and the sub-blocks will be quantized with different quantizer according the coefficients distribution; when the bias is large, the sub-block will be quantized with high accuracy; when the bias is little, the sub-block will be quantized coarsely.

其次,作者通过对小波高频子带图像系数分布直方图的分析研究,根据高频子带图像中绝大多数系数的幅度很小、幅度大的系数出现的几率很小的特点,提出了一种基于子带图像局部数据分布特征的自适应量化算法:先把高频子带图像分成较小尺度子块,子块系数离散性越大,采用精度越高的量化器:子块系数分布越集中,使用精度较低的量化器。

Aimed at the characteristics that design conditions of the foundation structures of offshore long-span-bridges are different from that of common bridges, the partial factors, the target reliability indices and the factors of wind load in different design fields were all analyzed. Then, three levels of target reliability indices which are 1.5, 2.0 and 2.3 respectively, and the corresponding factors of frequent value and quasi-permanent value of live loads based on JCSS model code with JC method were suggested.

针对大型跨海桥梁基础结构正常使用极限状态的设计条件不同于一般桥梁的特点,对各类不同设计领域的设计分项系数、目标可靠度指标及风荷载系数进行了分析和比较;然后以JCSS模式规范为基础,通过可靠度计算的验算点法,经过多次试算,建议了目标可靠度指标分别为1.5、2.0和2.3的三级可靠度水平及相应的可变荷载频遇值系数和准永久值系数。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。