In this paper, the propagating geometry and the w av eform of the GPS reflected signals are expatiated in detail. Furthermore, the pr inciple and the method of retrieving sea surface wind are presented. In order to te...In this paper, the propagating geometry and the w av eform of the GPS reflected signals are expatiated in detail. Furthermore, the pr inciple and the method of retrieving sea surface wind are presented. In order to test the feasibility of retrieval, the experiment data obtained by NASA in Hurr icane Michael are used. The result shows that the retrieval accuracy of wind spe ed is about 2 m/s.展开更多
发电设备的可靠性状态对电厂机组稳定运行和安全生产有着深远的影响,选用模糊综合评判法对设备可靠性状态进行评价,搭建了模糊综合评判方法的数学模型。针对不同权重系数确定方法计算综合评判矩阵导致评语集区间划分困难问题,对每个数...发电设备的可靠性状态对电厂机组稳定运行和安全生产有着深远的影响,选用模糊综合评判法对设备可靠性状态进行评价,搭建了模糊综合评判方法的数学模型。针对不同权重系数确定方法计算综合评判矩阵导致评语集区间划分困难问题,对每个数据点定义惩罚因子,采用可变惩罚因子最小二乘支持向量机(variable penalty factor least square support vector machine,VPF-LSSVM)优化模糊综合评判法,使用往日已知设备状态的点检数据,采用模糊综合评判法计算所得评判矩阵训练VPF-LSSVM模型,用于日后未知设备状态的直接定性归类,取代评语集。以白银热电1号机组汽动给水泵为例对实现过程进行介绍与分析,并与以给水泵运行参数直接作为特征向量输入的VPF-LSSVM分类识别结果进行对比,验证了优化模糊综合评判法的优越性。该算法对于设备可靠性等级评价及状态监测具有一定的借鉴意义。展开更多
文摘In this paper, the propagating geometry and the w av eform of the GPS reflected signals are expatiated in detail. Furthermore, the pr inciple and the method of retrieving sea surface wind are presented. In order to test the feasibility of retrieval, the experiment data obtained by NASA in Hurr icane Michael are used. The result shows that the retrieval accuracy of wind spe ed is about 2 m/s.
文摘发电设备的可靠性状态对电厂机组稳定运行和安全生产有着深远的影响,选用模糊综合评判法对设备可靠性状态进行评价,搭建了模糊综合评判方法的数学模型。针对不同权重系数确定方法计算综合评判矩阵导致评语集区间划分困难问题,对每个数据点定义惩罚因子,采用可变惩罚因子最小二乘支持向量机(variable penalty factor least square support vector machine,VPF-LSSVM)优化模糊综合评判法,使用往日已知设备状态的点检数据,采用模糊综合评判法计算所得评判矩阵训练VPF-LSSVM模型,用于日后未知设备状态的直接定性归类,取代评语集。以白银热电1号机组汽动给水泵为例对实现过程进行介绍与分析,并与以给水泵运行参数直接作为特征向量输入的VPF-LSSVM分类识别结果进行对比,验证了优化模糊综合评判法的优越性。该算法对于设备可靠性等级评价及状态监测具有一定的借鉴意义。
