prior to the vector construction, the availability of gene replacement was extensively tested in streptomyces . sp . fr-008 在载体构建之前,我们先在链霉菌fr-008中验证了基因置换方法的可行性。
the jacobian matrix of the 6-prrs parallel robot has been computed by two methods . one is differential coefficient based on symbol operation, the other is vector construction 对于6-prrs并联机器人的雅可比矩阵,分别使用了基于符号运算的微分构造法和矢量构造法进行求解,并验证了两种方法的正确性。
to interpolate the given ship offset data, the ship-hull surface is represented successfully by nurbs . the boundary conditions computation and knots vector construction are detailed in nurbs curve and surface interpolation 本文根据船体型值表的数据,用nurbs曲面来描述完整船体曲面,对插值曲面边界条件构造及节点矢量计算进行了研究,实现了船体曲线曲面的nurbs表达。