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The results show that dynamic softening is easy to occur in these ingots and flow stress becomes steady finally; the material constants of hot deformation are procedural parameters that stress-level coefficient α, strain rate sensibility exponent m and deformation activation energy Q are all increased with strain increasing, while stress exponent n is decreased gradually; the values α and m of the alloy homogenized are the biggest and the value n is the smallest, dynamic softening effect of the alloy is the most obvious, which can deform evenly; influence of strain on the value Q of the alloy homogenized is a little and the average value of Q is only 176.5kJ/mol, so the alloy is easy to deform; the alloy matrix shows the regular recrystallization grains when the strain is 50%; dislocation cell structure re-formed in the grains with increase of strain.

结果表明:经不同处理的Al-1Mn-1Mg合金均易发生动态软化并最终呈现稳态流变特征;热变形材料常数是过程量,随应变量的增加,应力水平参数α、应变速率敏感性指数m和热变形激活能 Q 随之增大,而应力指数 n 则逐渐减小;均匀化退火后,铝合金的α和m最大而n最小,动态软化效果最明显且变形均匀,在该状态下,铝合金的 Q 受变形量影响小,平均仅为176.5kJ/mol,易进行热变形;当应变量为0.7时,基体呈现规则的再结晶晶粒组织,随着应变量的增加,晶内重新形成了位错胞结构。

First, we have proved that the constraint of local constant gradient angles is equivalent to the minimization of total variation. Based on this, a stronger continuity constraint of gradient angle is presented. The interpolation formula (a 3-degree-PDE) derived from the constraint can ensure the continuity of level lines and reduce the width of edges. The contrast invariant of the regularizer of the formula is also proved.

首先证明了局部恒定的梯度角约束插等价于总变分最小化;在此基础上,提出一个具有更强连续性的梯度角约束,由这个约束条件导出的三阶偏微分方程使插的图像既可以保证水平线方向的连续性,又减小图像边缘的宽度;最后证明了插方程中正则项的对比不变性。

The difference of mean intraocular pressure among readings obtained with the lens in place, after lens removal and lens reinsertion were not statistically significant in bandage contact lens group and in low myopic contact lens group. But the high myopic contact lens group showed statistically significant difference of mean intraocular pressure obtained with the lens in place, after lens removal and lens reinsertion. In addition, the intraocular pressure readings measured immediately after myopic contact lens reinsertion revealed poor reliability.关键词 Tono-Pen , Soft contact lenses

我们把受测者分为三组:低度近视组,高度近视组和配戴治疗性隐形眼镜组,每组分别以受测者未戴隐形眼镜时的眼压做基准,而以其他三种情形的眼压分别与之比较,结果发现以Tono-Pen测量低度近视组和配戴治疗性隐形眼镜组的眼压可信度较高,但是戴上隐形眼镜之后马上测量的眼压较不准确,而高度近视组的测量则出现变异的现象,可信度较低。

In accordance with two learned values of current and relative slip frequency values the rotor time constant can be calculated.

根据两次不同的转差频率设定和经学习后得到的两个对应的定子电流学习,便可计算出转子时间常数辨识

In this paper, based on the minimum relative variables of attribute values, how the variety of attribute values affect the alternatives' ranking was discussed, and a quantitative express method was introduced ...

从属性最小变化量出发,结合实际案例研究了属性变化对方案排序的影响及其量化方法,采用该方法可以确定出每一个方案对属性改变的敏感性以及最敏感的方案。

The local minimum relative distances and the corresponding times, as well as the time when one space object enters and exits in the ellipsoidal region of another one are determined by solving the roots of the polynomials.

由A-N算法提出的准则不能直接计算插时间步长并可能导致丢根,对此根据多项式插误差理论提出了一种自适应的插时间步长选取方法。

The notion of - resolvent operator of set-valued mappings is introduced.

利用η-预解算子在有限维空间中探讨了集混合拟类变分不等式问题和广义集变分包含问题存在唯一解的条件;利用分析的方法在实Hilbert空间中讨论了集混合拟类变分不等式问题解集的非空性。

Considering the adaptation to the environment, some gene of the genomes is on active state which satisfy the condition of resonance, others are on silent state which unsatisfy the condition, and the situation can turned depending on whether resonance condition is satisfied or not.

在适应环境中,满足阈共振的基因组中的基因处於活动状态,不满足阈共振的基因组中的基因处於"沉默"状态,阈共振可使活动基因和"沉默"基因相互转化。

Generally speaking, the role of collecting revenue of stamp tax in all countries is in line with the capacity of wealth enrichment, the stronger enrichment capacity the more powerful role in collection mass fortunes.

税收管理领域存在常量,它是以个体样本均为中心乘以相应管理目标心理系数得到的区间而非精确

Around the finite solution problem of fuzzy differential equation, the fuzzy structure element method is put forward about the calculation of fuzzy analysis, and this method is applied to systematically study many problems such as formulation of fuzzy-valued function, difference of fuzzy-valued function, integration of fuzzy-valued function under the Riemann meaning, and the solution structure of fuzzy differential equation etc..

围绕模糊微分方程定解问题,提出了模糊分析计算的模糊结构元方法,并利用模糊结构元的方法对模糊函数的表述问题、模糊函数的微分、黎曼意义下的模糊函数积分以及模糊微分方程的解的结构等问题,进行了深入系统的研究。

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For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降,而后引起了信用卡大规模的亏损。

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