FOR Witten invariants, there have been many studies (see refs. [1—9]). Numerical computer calculation of some Witten invariants τ_r (M) of several three-manifolds was done by Freed andGrompf and Neil.
Carbon nitride films are deposited on Si (001) substrates by reactive dc magnetron sputtering graphite in a pure N2 discharge. The structure of carbon nitride f
Based on the radiocarbon data of the moss peat banks in Fildes Peninsula, Antarctica, it was calculated that the mean rates of peat accumulation in the upper la
NIADDM中肾功能衰竭的发生率(俄克拉何马印第安人糖尿病的研究)[英]/LeeET… //Diabetes.-1994,43.-572~579糖尿病肾病是美国25~64岁人中依赖透析的终末期肾脏疾病(ESRD)的唯一最重要原因。虽然,已认识到ESR...
The incidence of renal
The compositions of daughter mineral of melt inclusion in beryls, which are from pegmatites of Keketuhai in Xinjiang and Mufushan in Hunan, have been analyzed b