试论以用户为核心的地震科技信息服务

论述了以用户为核心开展地震科技信息服务的新思路，结合实际工作探讨了提高地震科技信息服务质量的方法。     

A VESSEL LICENSING FEE AS AN ALTERNATIVE PROPOSAL FOR A DEEP DRAFT WATERWAY USER CHARGE1

ABSTRACT: Congress, with the support of the Reagan Administration, is considering the imposition of a user fee on deep draft waterways and ports. Two major bills emerged in the 98th Congress and proposes a tax on import-export value while the other proposes a tax on import-export tonnage. This paper proposes and discusses another user fee alternative, a vessel licensing system. It outlines the advantages of such a fee system under a set of assumed objectives and discusses the range of possible license charge levels under a cost recovery target of $250 million.