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预测图象最佳压缩编码的实现方法
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作者 陈心海 周传华 《山东工业大学学报》 1995年第4期372-376,共5页
对二维二阶线性预测图象的最佳压缩编码(Huffman编码)的实现方法作了深入的研究.对预测误差图象的直方图合并技术进行了理论分析和推导.改进了Huffman码树的建立方法.并对14幅图象进行了编、解码实验.结果表明,... 对二维二阶线性预测图象的最佳压缩编码(Huffman编码)的实现方法作了深入的研究.对预测误差图象的直方图合并技术进行了理论分析和推导.改进了Huffman码树的建立方法.并对14幅图象进行了编、解码实验.结果表明,图象的信息无丢失,平均码长由8hit/pel下降到5.443bit/pel,压缩比为1.47,编码时间约8s/幅. 展开更多
关键词 编码 信息保持编码 预测图象 最佳压缩编码
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Study on the forecast method for underground coal mine
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作者 孙继平 任慧 +1 位作者 任兰铸 王坤 《Journal of Coal Science & Engineering(China)》 2006年第2期94-96,共3页
At present,coal mine fires were forecasted with some temperature,smog,CO,CO_2,etc,however,this method can't meet the requirements for safe production of coalmines in monitoring accuracy and validity.Overcoming the... At present,coal mine fires were forecasted with some temperature,smog,CO,CO_2,etc,however,this method can't meet the requirements for safe production of coalmines in monitoring accuracy and validity.Overcoming these problems of foregone moni-toring methods,using multi-parameters which include fire image,smog,CO,CO_2,O_2,etc,the paper put forward a synthetical analysis monitor with advanced technology of neuralnetwork.The research and application of this method has significance in theory and prac-tical value for coal mine fire forecast. 展开更多
关键词 mine fire fire image multi-parameters FORECAST
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