public IEnumerable <ENodebView> QueryCollegeENodebs(string collegeName,
DateTime begin, DateTime end)
{
var ids = _repository.GetENodebIds(collegeName);
return((from id in ids
select _eNodebRepository.Get(id)
into eNodeb
where eNodeb != null
let stats = _alarmRepository.GetAllList(begin, end, eNodeb.ENodebId)
select ENodebView.ConstructView(eNodeb, stats)).ToList());
}