hspice高人帮忙看一下

请hspice高人帮忙看一下
这是仿真lis文件：
.model vpnp_2x2 pnp
+subs=1
+is =9.0104e-19
+bf =2.1
+nf =1.01
+vaf=66.68
+ikf=6.1895e-04
+ise=2.1107e-18
+ne =4.8704
+br =0.345
+nr =1.01
+var=20.0
+ikr=3.742e-04
+isc=9.8451e-16
+nc =1.1413
+rb =47.1213
+irb=0.1
+rbm=1.0
+re =46.0732
+rc =40.2048
+xti=4.86
+xtb=1.29
+eg =1.12
+cje=8.25e-15
+vje=0.827
+mje=0.406
+cjc=2.87e-14
+vjc=0.502
+mjc=0.263
+nkf=0.4797
+tref =25.0
想问下+is =9.0104e-19
+ise=2.1107e-18是什么意思！有什么区别！
如果具体用到Ibe=Isexp(Vbe/Vt-1)时是用上面的is和ise哪个呀！

Too tough a question for me. Good luck.