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煤烟对食物、饮水氟污染的研究 总被引:2,自引:0,他引:2
测定了云南滇东“燃煤污染型”氟病区新、陈玉米(皮、饭)、饮用水(自然井水、泉水、室内缸水、开水)的含氟量,并对玉米、豆娄、辣椒进行水洗脱氟试验,结果证明由于用煤方式不当,造成室内食物、饮水的污染,发生氟中毒。 相似文献
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Numerical Investigation on Scattering of an Arbitrarily Incident Bessel Beam by Fractal Soot Aggregates 下载免费PDF全文
Scattering of an arbitrarily incident Bessel beam by fractal soot aggregates is numerically investigated. The incident beam is described by the vector expressions of the zero-order Bessel beam in combination with rotation Euler angles. The scattering problems involving fractal soot aggregates are formulated with a hybrid vector finite element-boundary integral-domain decomposition method. Some numerical results are included to show the scattering behaviors of fractal soot aggregates when they are illuminated by Bessel beams. 相似文献
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