海南岛海岸线曲折漫长,研究其海岸线自然属性变化对海南岛海岸带资源保护开发意义重大.以1970-2016年间8期遥感影像提取的海岸线时空变迁数据为基础,计算海南岛海岸线纵深度变化量和年平均变化速率,分析46年来海南岛海岸线稳定性.结果 表明:46年来,海南岛海岸线发生了剧烈的变迁,由自然因素引起的岸线后退变化逐渐减小,而人工开发引起的岸线向海推进速度明显加剧,强烈岸进区岸线长度达到330.37 km,占海南岛岸线总长度的21.57％.针对研究成果,提出减少截弯取直、保护好现有岸线走势等岸线资源合理开发利用建议.

对现场应急指挥平台搭建的国内外现状及特点进行了描述,并且分析了平台搭建中通信信道及辅助研判等存在问题,最后提出了平台搭建关于应急设备标准、融合通信体系架构及现场应急指挥辅助系统建设的相关建议.通过本文的思考,有助于提升现场应急指挥平台搭建的整体实战能力,在"处突抢险救灾"中发挥出更大作用.

本文提出了一种基于纹理特征的围填海SAR图像分水岭分割方法,首先对机载MiniSAR图像进行灰度共生矩阵纹理滤波,获得纹理特征图像,再对纹理特征图像进行分水岭算法分割,将获得的形态学重建图像进行门限阈值分割,得到最后的二值化分割结果.该方法一方面通过调整灰度共生矩阵纹理滤波的窗口大小,抑制了斑点噪声的影响;另一方面,利用分水岭算法对边缘模糊杂乱图像的优势,提高了围填海信息提取的准确性.实验结果表明,本方法对高分辨率SAR图像围填海监测图像的分割效果良好.

A red tide survey of 14 voyages was made in the Red Tide-Monitoring Areas of Xincun Harbour in Lingshui, Hainan during the period from April to October 2011, and recorded therein were phytoplankton species composition, dominant species, density, Shanon-Wiener index （H＇） and other community characteristics, based on which the horizontal distribution and seasonal variation trend of the phytoplankton community were analyzed. The results showed that a total of 106 species were recorded, of which diatom was dominant. However, the dominant species changed with time. The number of phytoplankton individuals was significantly different in horizontal distribution, was higher inside the harbour than near the entrance, and was remarkably affected by temperature.

系统分析了地面防空武器从平台中心化作战体系到网络中心化作战体系的发展变化,并对网络化作战体系的体系结构及动态作战指挥控制网的生成和作战流程进行了讨论,同时对网络化作战体系的未来发展进行了展望。