用 MOCVD方法生长了 In Ga As/ In Ga As P多量子阱微碟激光器外延片 ,用光刻、干法刻蚀和湿法刻蚀等现代化的微加工技术制备出直径 9.5μm的 In Ga As/ In Ga As P微碟激光器 ,并详细介绍了整个制备工艺过程 .在液氮温度下用氩离子激...用 MOCVD方法生长了 In Ga As/ In Ga As P多量子阱微碟激光器外延片 ,用光刻、干法刻蚀和湿法刻蚀等现代化的微加工技术制备出直径 9.5μm的 In Ga As/ In Ga As P微碟激光器 ,并详细介绍了整个制备工艺过程 .在液氮温度下用氩离子激光器泵浦方式实现了低阈值光泵激射 ,测出单个微碟激光器的阈值光功率为 15 0μW,激射波长约为 1.6μm,品质因数 Q=80 0 ,激射光谱线宽为 2 nm,同时指出微碟激光器激射线宽比 F-展开更多
This paper presents the derivation of an analytical model for a multi-queue nodes network router, which is referred to as the multi-queue nodes （mQN） model. In this model, expressions are derived to calculate two pe...This paper presents the derivation of an analytical model for a multi-queue nodes network router, which is referred to as the multi-queue nodes （mQN） model. In this model, expressions are derived to calculate two performance metrics, namely, the queue node and system utilization factors. In order to demonstrate the flexibility and effectiveness of the mQN model in analyzing the performance of an mQN network router, two scenarios are performed. These scenarios investigated the variation of queue nodes and system utilization factors against queue nodes dropping probability for various system sizes and packets arrival routing probabilities. The performed scenarios demonstrated that the mQN analytical model is more flexible and effective when compared with experimental tests and computer simulations in assessing the performance of an mQN network router.展开更多
【目的】地貌是地球表层系统最重要的自然地理要素,其形态划分对地学空间分异研究具有重要意义。【方法】以山西省西山矿区作为研究区,利用该区ALOS 12.5 m DEM数据,通过窗口递增分析和均值变点分析得到地形因子最佳分析窗口为13×1...【目的】地貌是地球表层系统最重要的自然地理要素,其形态划分对地学空间分异研究具有重要意义。【方法】以山西省西山矿区作为研究区,利用该区ALOS 12.5 m DEM数据,通过窗口递增分析和均值变点分析得到地形因子最佳分析窗口为13×13(0.0264 km^(2));利用相关性分析获得最佳地形因子为地形起伏度、海拔高度、坡度、地表切割深度和地表粗糙度;利用区域统计分析得到典型地形因子的分布状况,结合叠加分析提取了西山矿区30种地貌类型,其中浅切割陡小起伏中山为主要地貌,占总面积比为21.23%.【结果】通过与1∶100万地貌类型图的图斑数和地貌分类界线对比,得出地貌类型增加了21类,图斑数目增加了296个,分类界线更为准确,验证了研究结果具有一定可靠性和可行性。【结论】本地貌划分方法较以往更加科学可行,为进一步研究西山矿区灾害防治、开发利用等问题提供了数据参考。展开更多
文摘用 MOCVD方法生长了 In Ga As/ In Ga As P多量子阱微碟激光器外延片 ,用光刻、干法刻蚀和湿法刻蚀等现代化的微加工技术制备出直径 9.5μm的 In Ga As/ In Ga As P微碟激光器 ,并详细介绍了整个制备工艺过程 .在液氮温度下用氩离子激光器泵浦方式实现了低阈值光泵激射 ,测出单个微碟激光器的阈值光功率为 15 0μW,激射波长约为 1.6μm,品质因数 Q=80 0 ,激射光谱线宽为 2 nm,同时指出微碟激光器激射线宽比 F-
文摘This paper presents the derivation of an analytical model for a multi-queue nodes network router, which is referred to as the multi-queue nodes （mQN） model. In this model, expressions are derived to calculate two performance metrics, namely, the queue node and system utilization factors. In order to demonstrate the flexibility and effectiveness of the mQN model in analyzing the performance of an mQN network router, two scenarios are performed. These scenarios investigated the variation of queue nodes and system utilization factors against queue nodes dropping probability for various system sizes and packets arrival routing probabilities. The performed scenarios demonstrated that the mQN analytical model is more flexible and effective when compared with experimental tests and computer simulations in assessing the performance of an mQN network router.
文摘【目的】地貌是地球表层系统最重要的自然地理要素,其形态划分对地学空间分异研究具有重要意义。【方法】以山西省西山矿区作为研究区,利用该区ALOS 12.5 m DEM数据,通过窗口递增分析和均值变点分析得到地形因子最佳分析窗口为13×13(0.0264 km^(2));利用相关性分析获得最佳地形因子为地形起伏度、海拔高度、坡度、地表切割深度和地表粗糙度;利用区域统计分析得到典型地形因子的分布状况,结合叠加分析提取了西山矿区30种地貌类型,其中浅切割陡小起伏中山为主要地貌,占总面积比为21.23%.【结果】通过与1∶100万地貌类型图的图斑数和地貌分类界线对比,得出地貌类型增加了21类,图斑数目增加了296个,分类界线更为准确,验证了研究结果具有一定可靠性和可行性。【结论】本地貌划分方法较以往更加科学可行,为进一步研究西山矿区灾害防治、开发利用等问题提供了数据参考。
