1·The result indicated that support vector machine method has the obvious superiority in the forecast of breast cancer incidence rate based on gain quantity of trace element.
结果表明：在根据微量元素摄入量进行乳腺癌发病率预测方面，支持向量机方法有明显的优势。
2·The quantity of trace arsenic in grain and soil was determined by hydride nondispersion atomic fluorescence method.
本文采用氢化物无色散原子荧光法测定粮食和土壤中微量砷含量。
3·Trace-quantity phenol in raw water was removed rapidly and effectively by PAC absorption and bio-degradation.
PAC和活性污泥微生物对水中微量苯酚均有快速良好的去除效果。