我国档案馆口述档案资源采集模式及其比较

我国各级各类档案馆开展的口述档案资源采集实践中,逐渐形成了自采模式、社会征集模式和合作模式。这三种模式在口述历史开展的目的、口述档案管理的规范性、口述档案资源采集的成本和口述档案著作权的归属等方面存在各自的特点和一定的差异,对口述档案资源的管理和开发利用工作产生了一定的影响。因此,档案馆在选择口述档案资源采集模式时,需对比分析各模式的特点与差异,根据自身实际情况和需求选择合适的采集模式。

Removal of noises from electromagnetic radiation of coal or rock with EEMD-adaptive morphological filter

The electromagnetic radiation （EMR） signal collected by monitoring system during coal or rock dynamic disaster may be interferred easily by electromagnetic noises in mines. The noises have a direct influence on the recognition and analysis of the EMR signal features during the disaster. With the aim of removing these noises, an ensemble empirical mode decomposition （EEMD） adaptive morphological filter was proposed. From the result of the simulation and the experiment, it is shown that the method can restrain the random noise and white Gaussian noise mixed with EMR signal effectively. The filter is highly useful for improving the robustness of the coal or rock dynamic disaster monitoring system.