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中文摘要：
首先提出当前电子图书馆由于系统异构造成的兼容问题，然后就Z39．50、OAI-PM H和OpenURL等协议及标准对整合异构系统及所含资源的作用和效果进行详细分析，并就使用OAI-PM H协议进行系统整合的步骤和方法加以说明，最后对电子图书馆的联合检索应用前景进行总结和展望。
英文摘要：
In this thesis ,a statement is given in the first place on the compatibility problems coursed by heterogeneous systems using by current electronic libraries .Then a detailed analysis on the efficacy and effect of Z39 .50 ,OAI-PMH and OpenURL on integrating heterogeneous systems with resources contained by them is made .There follow the steps and methods of integrating systems based on OAI-PM H protocol .Finally ,this paper comes to an conclusion of the application of union research of electronic libraries .
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