1·At last, we we prove the decomposition and synthetize theorems of general fuzzy rough approximation operator.
最后，给出了广义模糊粗糙近似算子的分解与合成定理。
2·Using tri-functionality polyoxytrimethylene alcohol ether and polyethylene glycol, synthetize polyurethane elastomer with water absorption expansion rate of0~200%.
采用三官能度的聚氧化丙烯醚醇、聚乙二醇，合成了吸水膨胀率在0～200%的聚氨酯弹性体。
3·Objective:To synthetize methotrexate-bisphosphonates conjugate by adaptation of directed couple method, and to identify its structure, bone target tropism and the effect of drug on osteoblast.
目的：应用无桥直接偶联模式合成靶向抗骨肿瘤偶联物甲氨蝶呤-偕二磷酸，并对其进行结构鉴定，了解其体外骨靶向性及对人成骨细胞毒性的影响。
4·Organic aluminium can choose aluminium methoxide which has low cost and is easy to synthetize; inorganic salt can be served as basic sintetics, thus greatly lowering raw material cost;
有机铝可选择价格低、易合成的甲醇铝，而无机盐作为基本合成原料，可大大降低了原料成本；