极限质量

极限质量控制型苗木验收方案的研究

Study on a Sampling Plan of Limit Quality Control for Nursery Stock

关于按极限质量的多水平计数连续抽样方案

A Multi-level Continuous Sampling Plan by Attributes on the Basis of Limit Quality

采用极限质量分数电导率比较了大港、中东、塔河常压渣油各组分的导电能力和渣油体系的胶体稳定性。

The limiting mass fraction conductivity was obtained by extrapolating the curve of mass fraction conductivity vs the mass fraction of the component-benzene solutions .

通过引入弹道极限质量比的概念，定量地比较了非球形弹丸和等效直径球形弹丸破坏能力的大小。

By introducing the conception of ballistic limit mass ratio , the executions of non-spherical projectiles are made a qualitative comparison with that of spherical projectiles .

利用简并费米统计理论，并考虑到电子运动的相对论效应，求出白矮星的极限质量&Chan-drasekhar极限质量，并进一步讨论了这一极限质量在恒星演化过程中的意义。

Using degenerate Fermi statistics theory and considering the relativistic effect of electronic move - ment , this paper derives limited mass of White Dwarf Stars-Chandrasekhar limit , and then discusses the importance of Chandrasekhar limit in the stellar evolution process .

改进系统并保持原系统光学性能参数，在空间频率20lp/mm处，光学传递函数（MTF）保持在0.78以上，接近衍射极限，成像质量高而稳定。

The theoretical polychromatic modulation transfer function ( MTF ) is above 0.78 at space frequency of 20 lp / mm and is near to the diffraction-limitation .

中心极限定理在质量控制中的应用

Application of Central Limit Theorem in Quality Control

管材与不同部位模具间隙是影响薄壁管数控弯曲过程成形极限和成形质量的重要因素。

Clearance between tube and various dies is of great importance to influence forming limit and quality during thin-walled NC bending process .

借助于二元光学器件的独特性质，系统在仅使用两片锗透镜的情况下得到了接近衍射极限的光学质量。

The designed system benefits from the specialities of binary optical elements and approaches diffraction limitation by use of only two germanium lenses .

从结果看，该系统成像质量达到了衍射极限，成像质量稳定，体现了谐衍射元件消色差和消热差等性能。（4）离轴三反射镜光学系统研究。

The results show the imaging quality is near the diffraction-limitation and is stable . The designed system possesses good athermal and achromatic ability . ( 4 ) Design of off-axis three-mirror reflective optical system .

此系统能在4°视场内获得接近衍射极限的成像质量，各视场的波前差均小于1/4波长，光学传递函数接近衍射极限。

This system could achieve fine imaging quality that approaches diffraction limit over 4 ° field of view and the wave front aberration of each field is less than 1 / 4 wavelength , so that the modulation transfer function is approached to the diffraction limit .

最终获得了重复频率40Hz、单脉冲能量大于400mJ、近衍射极限的高光束质量激光输出。

More than 400 mJ , 40 Hz output laser with near diffraction limited beam quality was obtained .

DPSSL以其效率高，频率稳定性高好，线宽窄，达到衍射极限光束，光束质量高，使用寿命长等特点，具有广阔的应用领域。

DPSSL has wide applications because of its high efficiency , high frequency stability , narrow line width , high beam quality , long service life and the diffraction limit of laser beam .

极限编程中的质量控制

Quality Control in Extreme Programming

定义了激光光束衍射远场光斑压缩前后的能量比以及能量密度比来衡量超衍射极限激光光束的质量。

The ratio of the power and the ratio of the power density are firstly defined to evaluate the quality of the beam beyond the diffraction limits .

提出了一种能有效减小拉深件最大厚度变薄量，提高拉深成形极限及拉深件质量的夹紧式拉深模具结构，并已用于实际生产中。

In this paper , a kind of clamping drawing die is brought forward which can effectively improve the forming limit in drawing process and the quality of the drawing part , and reduce the maxim thickness thinning rate as well .