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A New Field Protocol for Determination of Forest Structure, Biodiversity and Heath Status by Means of GPS Tools: A Case Study from Gaza Forest 被引量:4
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作者 Yasser El-Nahhal 《Open Journal of Ecology》 2017年第1期69-83,共15页
This article describes the application of GPS, image processing analysis and statistical tools for determination of forest structure and biodiversity. The idea is based on determination of forest area using GPS tools,... This article describes the application of GPS, image processing analysis and statistical tools for determination of forest structure and biodiversity. The idea is based on determination of forest area using GPS tools, then taking representative plots “samples” about 5% - 10% of the forest and counting the tree species in each plot (sample). This process enables the estimation of species population in each plot. The sum of all species population enables the calculation of relative density of each species. Multiplying species population with plot number of the forest enables the calculations of total species population in the forest. Calculating the relative density enables the determination of dominant, co-dominant, suppressed and flour structure of the forest. To determine the age of the forest, we apply our method on determining the diameter of trees and grouping them to four groups, this enables the estimation of dominant age within single species. From these data, we can estimate the age of the forest. This field protocol is easy and applicable and provides good results in estimating structure, age and biodiversity in the forest. 展开更多
关键词 FOREST tree Counts tree Age BIODIVERSITY Health STATUS field protocol
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一种应用层协议解析加速算法 被引量:4
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作者 李军 倪宏 +1 位作者 陈君 王玲芳 《四川大学学报(工程科学版)》 EI CAS CSCD 北大核心 2014年第4期87-93,共7页
为解决WEB应用服务端高并发压力时应用层协议解析带来的性能和稳定性问题,通过统计分析发现一些应用层协议(如RTSP、HTTP、SSDP等)结构具有字段数量有限、字段名称固定、名称与分割符之间内容为该字段值以及结构非固定等特征,提出一种... 为解决WEB应用服务端高并发压力时应用层协议解析带来的性能和稳定性问题,通过统计分析发现一些应用层协议(如RTSP、HTTP、SSDP等)结构具有字段数量有限、字段名称固定、名称与分割符之间内容为该字段值以及结构非固定等特征,提出一种协议字段树结构,基于该结构提出一种应用层协议内容解析加速算法,在解析过程中不会出现匹配失败及回溯情况。针对具有上述特征的应用层协议,通过与传统的协议解析方法及多模字符串匹配算法实验对比,结果显示,提出的基于协议字段树结构的解析加速算法解析性能比传统的解析方法平均提升16.5%以上,算法适用于高并发压力下ASCII及二进制形式的协议内容解析,具有良好的扩展性。 展开更多
关键词 应用层协议解析 协议字段树 协议分割符 字符串匹配
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