系数

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。

The results of laboratory reconstituted permeability tests show that the permeability coefficient of remolded marlite samples is greater than that of the reconstituted clay rock when their dry densities are the same with natural water content.

室内重塑渗透试验结果表明：天然含水率下相同干密度的重塑泥灰岩的渗透系数大于黏土岩，其渗透系数随干密度的增大而减小的速率小于黏土岩，且测得重塑膨胀岩样渗透系数均小于场地的原位渗透系数。

In incorporation with Jilin province science and technology department item "Study of Industry Technological Advance Systemic Effect and Frame of Jilin Province industry Technology Incidence Establishment", about national interindustry incidence relation ,research is carried out in the paper as follows:On the base of national 1997 years input-output production table ,figures out direct consumption matrix of coefficients and matrices of middle input rate.

本文结合吉林省科学技术厅课题《产业技术进步系统效应及吉林省产业技术关联表编制框架研究》对我国的产业关联关系做了如下研究：在我国1997年投入产出表的数据基础上，计算出直接消耗系数矩阵及中间投入率矩阵，并将图分析法用于产业间关联关系的研究中；在计算完全消耗系数矩阵后，计算出各产业部门的感应度系数和影响力系数，并做了波及效果分析；本文经过对各种测算技术进步方法的比较，首次采用前沿生产函数中的数据包络分析方法分析投入产出模型中的产业间技术关联；机械设备制造业具有较高的物质关联性和技术关联性，同时波及效果显著，把含有高新技术的机械设备制造业作为主导产业发展，可以提高整个工业的技术装备水平。

In this paper eighteen examples, which are designed strictly owning to currently Codefor seismic design of buildings of my country, are used to analyze the structure earthquakeresponse under the horizontal seismic load (nabla load distribution pattern) by Push-overanalytical method. The corresponding structural influencing coefficient, the displacementamplification factor, the overstength and ductility factors are analyzed taking into accountthe factors changing, such as level number, span length, span number.

本文严格按我国《建筑抗震设计规范》设计了18个多层钢框架，并以此为例，采用Push-over方法分析了结构在水平荷载作用下的地震反应，得出了多层钢框架的结构影响系数、结构延性和超强系数以及位移放大系数，并讨论了这些系数随着结构层数、跨度及跨数的变化规律。

Numerical simulation and shaking table tests for acceleration response of piles in liquefiable ground were performed under three earthquake events.

结果表明：三种地震输入下，自下而上沿桩-柱墩长度方向，加速度峰值放大系数变化基本一致且均出现在10～20s时段内，加速度时程曲线的形状也极其相似；压缩0.15g El Centro波输入下加速度反应在砂土层与黏土层过渡带有增大趋势、在地表则有一定程度减小，且压缩0.15g El Centro波较0.15g El Centro波输入下均偏小，0.15g El Cen-tro波输入下自下而上桩的加速度时程幅值和峰值放大系数的试验值、计算值均一直有较大幅度增大；0.5g El Centro波输入下，加速度时程幅值的计算值和试验值在桩折断位置之下一直增大、至砂土层与黏土层过渡带则大大减小，加速度峰值放大系数的试验值和计算值在砂土层与黏土层过渡带突变增大、而在地表则明显减小，且较0.15g El Centro波输入下桩的峰值放大系数要偏小。

Finally, the method is demonstrated with some oil derrick.

首先，应用当量损伤系数作为判别损伤是否存在与程度大小的综合评价指标，建立了损伤刚度矩阵；其次，确定了应力与当量损伤系数之间的函数关系，推导了应力残差矩阵对当量损伤系数的灵敏度表达式；然后，构造了基于应力的目标函数，提出应用正算过程和优化方法反演识别当量损伤系数；最后，用该方法对某石油井架进行了损伤识别。

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。

When these coefficients are quadratic functions of the porosity, specific constituent orthogonal weighting coefficients are derived from these orthogonal conditions along with a discussion about how to extend the applicable range of the constituent orthogonal weighting coefficients in the orthogonal coordinates. Based on the combination of the theory of critical porosity and the constituent model, it presents a specific example of the constituent model that includes two transforming points. The reasonability of above-mentioned theories is shown by comparison of theoretical calculations and measured data on effective elastic moduli of clean sandstone or sandstone analogs saturated with pure water.

再次，结合弹性模量组分关系方程与正交基函数理论，推导组分加权系数的正交条件；基于正交条件，提出组分加权系数为孔隙度二次多项式时正交组分加权系数的构造方法以及正交组分加权系数适用范围的拓展方法；结合临界孔隙度理论，提出一个基于两个状态分界点的组分模型实例；比较组分模型的计算结果与前人关于砂岩弹性模量的实验结果，证明了组分孔隙介质模型理论的合理性。

The results showed that the environmental temperature and the direction of particle paving were key factors influencing diffusion coefficient.With environmental temperature increasing,the moisture diffusion coefficient enlarge evidently,and the diffusion efficient parrel to the particleboard surface is higher than that verticle to the particleboard surface.

结果表明：环境温度和刨花的铺装方向是影响扩散系数的主要因素，随着环境温度的提高，水分扩散系数明显增大：平行于板面的扩散系数高于垂直板面的扩散系数。

In a system consisting of 20% PEG 400 and 12% magnesium sulfate, the partition coefficient of PGA was less than 0.01, PGA almost completely partitioned into the magnesium sulfate-rich bottom phase. Meanwhile, the partition coefficient of cephalexin was 6.7, the partition coefficients of phenylglycine methyl ester and 7-ADCA were 1.5 and 1.2, respectively.

通过考察头孢氨苄、苯甘氨酸甲酯和7-氨基脱乙酰氧基头孢烷酸(7-ADCA)在ATPS中的分配行为建立了一个含20%PEG 400和12%硫酸镁的ATPS，在此体系中头孢氨苄的分配系数为6.7，苯甘氨酸甲酯的分配系数为1.5，7-ADCA的分配系数为1.2，且青霉素酰化酶的分配系数小於0.01。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。