Neither socioeconomic status, latrine density, population density nor study year had a significant influence on disease risk.
社会经济状况、公厕密度、人口密度以及研究年份都未对患病风险产生重大影响。
Using quadratic rotational regression combination design to study the influence on yield of the rape under the different nitrogen and density.
运用二因素五水平回归正交旋转组合设计，进行施氮量与密度对油菜产量影响的研究。
The model considered the influence of the crowd density on the evacuation capability, and the capacity of the egress was taken as a variable rather than a constant as former.
模型中考虑了人群密度对疏散能力的影响，改变以往把建筑出口疏散能力视为常数而带来的不能真实反应其疏散能力的状况。
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