如何强制NHibernate识别未通过NHibernate进行的db更改

I am implementing NHibernate into an existing web application. However, we have some other processes that do bulk inserting and updating on the database. How can I make NHibernate aware that changes are occurring on the backend db that were not initiated through NHibernate?I am implementing NHibernate into an existing w