Blind equalization based on RLS algorithm using adaptive forgetting factor for underwater acoustic channel

Blind equalization based on adaptive forgetting factor, recursive least squares （RLS） with constant modulus algorithm （CMA）, is investigated. The cost function of CMA is simplified to meet the second norm form to ensure the stability of RLS-CMA, and thus an improved RLS-CMA （RLS-SCMA） is established. To further improve its performance, a new adaptive forgetting factor RLS-SCMA （ARLS-SCMA） is proposed. In ARLS-SCMA, the forgetting factor varies with the output error of the blind equalizer during the iterative process, which leads to a faster convergence rate and a smaller steady-state error. The simulation results prove the effectiveness under the condition of the underwater acoustic channel.     

基于一张图的开发区建设用地精细化管理研究

以县管省级开发区为例,基于SOA架构,在ArcGIS平台上开发了建设用地精细化管理一张图平台,设计了开发区建设用地宗地数据的快速更新、浏览、查询、统计分析、专题制图等功能,其结果可通过计算机与互联网实时向开发区管委会、市国土资源局与省国土资源厅三级管理部门进行可视化传导,实现了开发区建设用地从审批、征收、供应到利用的全过程动态管理,为开发区建设用地管理的精细化提供了指导和参考。