This paper researches the application of morphology reconstruction algorithm in dim point target detection and tracing, mainly in background estimation and post processing stage after detection.

重点研究了形态学重构算法在微弱目标检测和跟踪中的应用，主要体现在对原始图像的背景估计过程和检测后处理过程。

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This article summarizes the accuracy and coverage evaluation survey (A. C. E. survey) of the American census 2000. It includes sampling design, post-stratification, dual-system estimation and so on.

本文概要地叙述了美国2000年人口普查后所进行的准确性和数字评估调查（A.C.E。调查）。它包括：抽样设计、事后分层、双系统估计等等。

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With the ANN toolbox of MATLAB6.5, a three-layer BP network model for earthquake economic loss estimation is built up. This model is applicable to fast estimation of post-quake economic loss.

应用MATLAB6.5神经网络工具箱，建立了适用于震后经济损失快速评估的三层BP神经网络地震灾害经济评估模型。

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Using desired fertility constructed from both retrospective and prospective questions, together with instrumental variables estimation, it is shown this strong result is not affected by either ex-post rationalization of births nor the dependence of desired fertility on contraceptive access or cost.

FORBES: UN Population Predictions: Up To 15 Billion by 2100