简介: 做为制造业领先指标(通常是三个月)的保留进口,the retained import figure does give a relatively good indication of the direction of the manufacturing and electronic activities and as such the Singapore economy. The indicator that reflects the domestic demand is the non-oil imports. It fell 19.3% in July,turning points in the economy are signalled by three consecutive months of LEI changes in the same direction. This leading indicator is like a lighthouse
简介: 做为制造业领先指标(通常是三个月)的保留进口,is still down. It fell15.6% for 1998. This spells weak manufacturing and electronics figures in the following two quarters. July’s total trade figures fell 9.1%,turning points in the economy are signalled by three consecutive months of LEI changes in the same direction. This leading indicator is like a lighthouse
简介:用不同于已有的方法证明了任意实Banach空间中一致Lipschitz强连接伪压缩算子在具误差的修正的Mann迭代和具误差的修正的Ishikawa迭代下收敛和稳定的等价性,其中迭代参数{βn}仅需limsupn→∞βn〈k/L(L+1),这推广和改进了目前需假设limn→∞βn=0和两迭代程序初始点的取值需相同条件下的已有结果.
简介:将约束总体最小二乘法(CTLS)应用到目标来波信号方向估计(DOA)中,通过将回波角度估计问题转化为约束总体最小二乘问题,采用一种新的迭代求解方法,可以快速求解,大大简化运算,并可快速收敛到全局最优解;在低中度SNR时,CTLS法估计精度要好于求根MUSIC法(ROOT—MUSIC)和基于总体最小二乘(TLS)改进子空间的超分辨方法的估计精度,在HSNR情况下接近克拉关-罗界(CRB),通过仿真结果对比,证明了CTLS方法在超分辨中的高分辨率性能和该方法的有效性。