aa = csr_matrix(orig) aa有如下属性: # 2代表第第一行有2个不为零的元素,# 3代表第第一和二行不为零的元素总共有3个# 6代表第第一、二和三行不为零的元素总共有6个indptr: array([0, 2, 3, 6], dtype=int32)# 0,2代表第一行中的位置0和2有非零元素# 2代表第二行中的位置2有非零元素...
(II) at different reaction times before and after carbon source stress/induction 表 3 碳源胁迫/诱导前后 EPS 重金属吸附的动力学参数 Table 3 Kinetic parameters of EPS heavy metal adsorption before and after carbon source stress/induction EPS 种类 Control-EPS HCOONa-EPS CH3COONa-EPS C6H12O6-EPS ...
Abstract:Usingsoilandweatheredsandasmatrix,twonorthernbroadleavedannualseedlingsAcerginnalaandAcer monowerepottedtostudytheinfluenceofsoilPbpollutiononphotosynthesisandchlorophyllfluorescence characteristicsinleavesofseedlingsbydesigning5kindsofPb 2+ concentration(0,100,500,1000,2000mg/kg).The resultshowedwithincreasing...