Baiju, and Thomas, thanks for your respon ...
but, it works, with add method name_get

code name_get :

def name_get(self, cr, uid, ids, context=None):
        if context is None:
            context = {}
        res = []
        for record in self.browse(cr, uid, ids, context=context):
            tit = "[%s] %s" % (record.name, record.ket)
            res.append((record.id, tit))
        return res

I hope, if I have difficult, you can help me ...
hehe.

You can create a new function field which concatenate the 2 others.

In the new api i think you have to add the compute attribute to a new field which will also concatenate the 2 others. 

Here is the new api docs :http://odoo-new-api-guide-line.readthedocs.org/en/latest/fields.html#field-types