分布参数

On the basis of the FEM simulation results, the forming mechanism of tube stagger spinning is studied. The studied mainly include the stress and strain distribution law, the influence of key process parameters on the spinning forces and diameter dimensions, and the main simulation defects.

主要的工作包括：应力应变分布规律研究；关键工艺参数对旋压力、内径尺寸精度的影响规律研究；以及对旋压模拟中的损伤缺陷、不贴芯模缺陷和隆起缺陷的产生原因和防上措施的研究。

As the main part of this thesis, based on RSJ model, a symmetric DC SQUID is theoretically studied through two-dimensional Fokker-Planck equations, by using the "potential condition" in the case of steady state, the stationary probability distribution function of this system is obtained firstly in the accurate theory, meanwhile, the expressions of all the SQUID characteristics functions are obtained, for example, the circulating current, total normalized voltage and transfer function.

作为本论文的主体工作，我们以RSJ模型为基础，利用二维Fokker—Planck方程从理论上研究了对称型双结超导量子干涉器件，利用定态条件下的"势条件"得到了系统定态概率分布的精确解析表达式，进而得到了该系统所有特性函数如环路电流、总电压、调制函数的统计表达式，利用数值计算讨论了各种参数对DC SoL71D系统特性的影响。

Statistical inference when the functional form of the distribution is not specified.

非参数推断：分布的函数形式未知时的统计推断。

By applying the theory of infinite series, this paper proves a factorial inequality and proposes an improved upper bound of the parameter on Stirling s formula.

应用级数理论证明了一个关于阶乘的不等式，从而给出Stirling公式中参数的一个改进上界，并在此基础上，对一个有关产品检测的古典概率———二项分布的近似计算问题进行了讨论

Base on the classical problem of the theory of optimal stopping──the secretary problem,k-th choice problem is worked out(k managers choose k secretaries ).The optimal stopping rule is given,and we proved that the optimal value of probability is the kth item of Poisson distribution with parameter k.i.e.e￣-K/k!.

从最优停止理论的经典问题──秘书问题出发，构想了K个经理从N个姑娘中各选一秘书的问题，证明了其最优规则，得出了概率最优值是参数为K的泊松分布的第K项，即e￣k￣k／k从！

In this paper,the sum of products equality is proved,and the density function of the linear combination of tow-parameters exponential random variable s is presented.

证明了一个关于积和的等式，并由此推导出双参数指数型随机变量的线性组合的概率分布密度函数

Therefore, the heat exchange situation of rear superheater is much badly and temperature exceeding and pipe explosion frequently occur.

经常出现超温爆管的现象，为了能够尽可能避免这种现象的出现，必须要知道后屏过热器管屏的金属壁温和管内工质的状态参数的二维分布。

Based on Berry and Tabor's theory,we studied the sensitivity of the level distribution function P on the coupling.

利用Berry和Tabor理论，研究了该系统的能级分布函数P对系统中耦合参数的敏感性。

With the help of tensor analysis theory, the velocity field and the strain rate field during the tri-walled tube forming process are deduced, and the energy rate and the needed driving force are determined.

运用数学物理方法，遵循能量守恒定律对卷焊管电阻直热式钎焊过程进行了稳态分析，求得了焊接区上的温度分布及钎焊各工艺参数间的关系，并进一步探讨了钎焊温度波动控制策略及方法。

the article examines the characteristics of foreign exchange returns distribution,coupling with kinds of foreign exchange datas, figures out parameters of model by using variance gamma model.the empirically results ofkolmogorov-smirnov test and goodness of fit chi-square test shows that v.g.

本文运用方差gamma模型对外汇收益分布特征进行对比拟合分析，并结合几种被选汇率数据对模型参数进行估计。ks检验和卡方拟合优度检验的实证结果表明v.g。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。