Limited knowledge of the disease, its focal distribution and the fact that it affects mainly poor rural communities contribute to low reporting of cases.
对该病的知识有限、其局部性分布以及它主要影响贫穷的农村社区这一事实是造成病例报告水平低的一些因素。
The significance of the method proposed by the authors to analyze source fault by using the data of focal distribution and mechanism of an earthquake sequence has been discussed.
文中讨论了作者所提出的利用地震序列的震源分布和震源机制资料分析震源断层的意义。
The centroid position of the focal spot directly depending on intensity distribution and phase slope distribution of near field is derived and its physical meaning is described.
进一步推导了焦斑质心位置对光束近场强度分布和相位斜率分布的依赖关系式，并对该式清晰的物理意义进行了阐述。
A new analysis method is proposed for calculating the flux density distribution on focal plane of solar concentrators.
提出一种计算太阳能聚光器聚光焦斑能流密度分布的新方法。
The axial intensity distribution and focal shift of H-G beams with even mode Numbers are analyzed and illustrated with detailed numerical examples.
利用数值计算详细分析和说明了偶数模厄米高斯光束的轴上光强分布和焦移。
The paper introduces the distribution and utilization of confined water of intermediate focal depth in Huaibei plain, and analyses some relevant questions about it.
介绍淮北平原在中深层地下水分布及开发利用，对与中深层地下水开发利用相关问题进行了分析。
The research result shows the location accuracy by the method is better and improves more than original location result in residual error, evaluated error, epicenter distribution and focal depth.
研究结果初步表明该方法定位精度比较高，无论在残差、测定误差、震中分布还是震源深度方面，都比原来定位结果有较大改进。
The space frequency distribution on rear focal plane restores to the distribution of complex amplitude on image plane.
后焦面上的频率分布还原成像面上的光场复振幅空间分布。
When a target is placed in the focal plane of a focused aperture antenna, the backscattered power from the target may be greatly enhanced by properly choosing the aperture distribution.
当目标处于聚焦天线焦平面上时，可通过选择口径分布来提高目标的后向散射功率。
AIM: to probe into the dynamic progression of the space time distribution of neuronal apoptosis and necrosis in rats after focal cerebral infarction and compare their space time correlation.
目的：探讨大鼠局灶性脑梗死后神经细胞凋亡与坏死的时间、空间分布的动态演变及二者时空、时效关系的比较。
Methods the distribution and quantity of FAP-1 immunological positive cells in the brain were observed with immunohistochemistry method after focal ischemia.
方法应用免疫组化方法观察大鼠局灶性脑缺血后脑组织中FAP - 1蛋白免疫反应阳性细胞数量及分布。
The results indicate that with the increase of focal length, the intensity distribution on the focal plane varies from central-dip form to Gaussian distribution.
结果表明：随着聚焦距离的增加，焦面光强分布由中央凹陷状向高斯分布转变。
The on-axis intensity distribution was investigated in the focal region of partially coherent light focused by an annular lens.
从理论上研究部分相干光被一环形透镜聚焦，在焦点附近的轴上点的光强分布。
The analysis of focal mechanism for 70 events in the SB coastal China indicates that the principal compression axes of the recent stress field is characterized by a fan-shaped distribution.
本文分析了东南沿海地区70个震源机制结果，得到本区现代构造应力场的主压应力轴具有扇形分布的特征。
The distribution of focal depths of small earthquakes shows that focal faults of the two historical strong earthquakes should be shallow.
小震震源深度的分布情况表明，两次历史大震的震源断层可能都比较浅。
On the accurate and intuitional formula, each parameter related to axial optical intensity distribution and focal shifts is analyzed through numerical calculation.
通过数值计算，对各个参数对光强分布和焦移的影响进行了分析。
We analyzed the cause of focal depth distribution and explained the precursory mechanism of small and moderate earthquakes with occurrent condition and characteristics of strong earthquakes.
通过分析中小地震深度分布特征的原因，结合强震发生的条件和特性，对中小地震前兆机理进行了解释。
Furthermore, the approach can also be used to analyze the amplitude in the exit pupil of a camera lens and calculate the light intensity distribution on other focal planes.
该方法亦可用于分析光学系统出瞳振幅分布，数值计算其他焦面处的光强分布。
The results show that the intensity distribution of focused EFGB change quickly, especially near the focal point, and the spot will rotates quickly.
结果表明，EFGB聚焦后，近场光强分布变化很快，特别是焦点前后，光强分布会快速旋转。
Through focal mechanism analyses of mid small earthquakes occurred in Tengchong volcano areas, the spatial distribution of tectonic stress field, focal types and fracture types have been studied.
通过对腾冲火山区强震和中小地震震源机制解分析，对火山区构造应力场方向空间分布，以及震源类型和破裂特征作了研究。
Geological and geochemical anomaly features of the Xushan W-deposit are described in this paper with the focal points standing at geochemical anomaly zoning and distribution pattern.
本文叙述了江西徐山钨矿床地质地球化学特征，着重讨论了地球化学异常分带和异常模式。
The radiation flux distribution at the focal image is experimentally determined by a photographic technique. using the sun and moon as the radiation sources respectively.
实验研究采用摄影法，分别以太阳和月亮为光源拍摄焦平面上的像斑。
The average focal mechanism of the swarm area has been inversed from the spatial distribution of the polarities of 2177 P-wave initial motions in the Jaishi swarm.
根据伽师震群地震的2 1 77个P波初动方向记录，计算了伽师震群的平均震源机制解。
The average focal mechanism of the swarm area has been inversed from the spatial distribution of the polarities of 2177 P-wave initial motions in the Jaishi swarm.
根据伽师震群地震的2 1 77个P波初动方向记录，计算了伽师震群的平均震源机制解。
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