查询词典 attenuation factor

X-ray tube spectrum model;spectrum reconstruction;attenuation data

X射线球管光谱模型；光谱重建；衰减数据

A physical meaningful seven-parameter X-ray tube spectrum model is firstly established. Then model parameters are calculated from attenuation data so that X-ray tube spectra can be reconstructed.

该方法首先建立一个具有物理意义的7参数球管光谱模型，再通过测量的光谱衰减数据求解模型参数，进而重建光谱。

Finally, a design example of optical system used for smog attenuation testing system is given to illustrate the effect of spherical aberration on the image beam waist.

最后通过激光羽烟衰减测试系统中聚光光学系统的设计实例说明了球差对高斯光束像方束腰的影响。

Radius variation of image beam waist due to spherical aberration, which varies with the position of objective beam waist, and optical system focus is analyzed with the form of curve. At last,a design example of optical system used for laser plume attenuation testing system is given to illustrate the effect of spherical aberration on the image beam waist.

本文还提出了在设计过程中存在的球差对激光束像方束腰的影响，对其进行了理论分析，并给出了数学模型，总结出高斯光束的像方束腰半径与物方束腰位置、光学系统焦距之间的关系，并对本光学系统的设计进行了验算。

With the theoretical model of spherical grain dynamics of sparse two-phase flow in single dimension, computing formulas of velocity′s attenuation and scattering distance were built for explosive residue grains in horizontal. Then, a simplified theoretical model on distribution of explosive residue was put forward on the basis of a spherical space with radius equalling to maximum horizontal scattering distance of explosive residue grains with certain diameter.

为了对残留物颗粒的飞散运动及分布规律进行理论分析，利用球形颗粒一维稀疏二相流动力学模型，研究得到炸药残留物颗粒的速度衰减及水平飞散距离计算公式；在此基础上，建立了以某粒径残留物颗粒水平运动极限距离为半径的炸药残留物颗粒球面空间分布简化理论模型。

The best corrected visual acuity was hand motions vision. Biomicroscopy revealed a small posterior subcapsular cataract in both eyes. On funduscopy, both eyes showed waxy pale appearance to the optic nerve head, vessel attenuation, diffuse bone spicule pigmentation in the retina beyond the superior and inferior vascular arcades.

裂隙灯下见双眼晶体后极部后囊膜下皮质轻度混浊，直接检眼镜下可视盘蜡黄色，边界清楚，视网膜血管变细，视网膜色污秽，上下血管弓以外视网膜可见大量骨细胞样色素沉着，左眼后极部黄斑区呈金箔样反光。D-15色彩排列试验不能查。

Furthermore, the parameters of the pulse stacker, such as attenuation and time delay, etc, were worked out.

在此基础上，计算获得了脉冲堆积器的衰减系数、延时等控制参数。

Looked from the institutional transition process, the regional advance gradually of institutional transition leads to the regional difference of institutional structure, and because of the slow of inner-regional attenuation of traditional planning economic system, its new market economic system forms stagnantly, whereas sea-side region is contrary,.

从制度转型进程来看，制度转型的区域渐进引致制度结构的区际差异，内陆地区的传统计划体制衰减速度比较缓慢，从而新的市场经济体制的形成滞后，而沿海地区则相反；从制度创新的地区分布来看，沿海地区往往是制度创新的先导地区，在制度创新极和经济增长潜力相吻合的沿海地区，则有较高的经济增长速度。因此，制度变迁与地区经济增长之间有着重要的内在逻辑关系。

The mass thickness and surface homogeneity of the stannum attenuation foil can meet the request of soft X-ray laser experiment.

质量厚度和表面均匀性的测试结果均符合软X光激光实验的要求。

Firstly, a necessary and sufficient condition for an uncertain multi-channel descriptor system to be robustly stabilizable with a specified disturbance attenuation level is derived in terms of a strict nonlinear matrix inequality.

主要考虑分散H输出反馈控制问题。推导出了使不确定多通道奇异系统能鲁棒稳定且满足一定的性能指标的充分必要条件，没有等式约束的非线性矩阵不等式条件。

Pradeep Indulkar, a senior official at the Maharashtra state Home Ministry say 101 human were killed and 287 injured.

马哈拉施特拉邦内政部高级官员Pradeep Indulkar称，有101人在冲突中丧生，287人受伤。

Mark Frei, a senior vice president of West, says 80% of West's homeagents have some college education, compared with 30% of those whowork in office-based call centers.

Frei说，该公司80%在家办公的人员都拥有本科学位，而在公司电话中心工作的人中只有30%拥有本科学位。