高浓度深层渗碳碳分布数学模型建立与应用

在对高浓度深层渗碳的特点进行分析的基础上，考虑到碳化物的析出与溶解、温度与碳浓度对扩散系数的影响、气氛环境对碳传递系数的影响，提出了高浓度深层渗碳的数学模型，并导出了差分法求解方法。应用该模型实现了高浓度深层渗碳的计算机实时控制。     

连片叠前深度偏移处理技术在孤西地区的应用

孤西断裂带地质构造十分复杂,速度横向变化较大,该区已进行了三维连片处理,但潜山的构造背景及准确细致的构造形态仍不清楚,制约了对该区带的深入地质研究和评价。采用匹配滤波、叠前数据规则化等技术对叠前连片道集进行精细处理后,再进行叠前深度偏移迭代,并利用层析成像法对层速度模型进行校正,成像剖面信噪比较高、潜山归位准确,内幕清楚,发现和落实了多个圈闭构造。     

铁酸铜转化为硫酸铜的方法

在铜精粉的湿法冶金和生产硫酸铜的过程中，若焙烧温度控制不当，便会有大量的铁酸铜生成，而传统的湿法冶金和硫酸铜生产工艺，对此无能为力，不但造成资源的浪费，又增大了生产成本。     

北海市污水排海管海底敷设浅谈

在北海市红坎污水处理厂海洋放流管工程中，考虑到基本的水文、地形条件和排放口的合理布局及污水处理程度等因素，在确保北海近岸各水域功能的水质指标保持在一定范围内的基础上， 管长由原设计的９１２。８ｍ缩短为７５５ｍ，扩散器也由原来的４７根竖管改为３８根，管径由２ ２００ｍｍ缩小为１ ８００ｍｍ，管壁厚度由２２ｍｍ缩小为１６ｍｍ。施工方案从顶管法改为整体吊装沉管法。     

Two methods to solve the ionospheric electron concentration horizontal gradient at Chongqing

The electron concentration horizontal gradient vector of the ionosphere and its south-north and east-west components over Chongqing station are analyzed and calculated, using the first approximation, time correlation and space correlation and another approach introduced. And then, the validity of the two methods is analyzed and compared. Foundation item: Supported by the National Natural Science Foundation of China (69571020) and the Research Fund for the Doctoral Program of Higher Education (RFDP1999048602) Biography: Chong Yan-wen(1972-), male, Ph. D. candidate, research direction: ionospheric modeling and inversion.     

从《悬诗》看祖海尔的战争观

在伊斯兰教创教之前，阿拉伯半岛游牧人的生活中充斥着血亲复仇和部落战争，“阿拉伯人的日子”也正是对发生在各部族以及阿拉伯人与外民族之间战争的记录。正是在这个战争频繁、劫掠成性的年代，祖海尔在其《悬诗》中独树一帜，竭力反对战争，主张和平相处，实为难能可贵。     

Generalized reliability measures of Kalman filtering for precise point positioning

To deal with the adverse influence of model failures on Kalman filtering (KF) estimation, it is necessary to investigate the generalized reliability theory, including the model failure detection and identification method as well as the separability and reliability theories. Although the generalized reliability theory for the least square has been discussed for many decades, the generalized reliability theory of KF is not widely discussed. Compared with the least square, KF includes not only the measurement model, but also the dynamic model. In KF, the predicted value of the state parameters from the dynamic model is considered as pseudomeasurements and combined with the observed measurements to compose the form of the least square. According to the reliability of the least square, the generalized reliability of KF is derived. Then, the dynamic model failure of precise point positioning is simulated to demonstrate the usage of the generalized reliability theory. The results show that the adverse influence of the dynamic model failure is more severe than that of the measurement model. Moreover, it is recommended that the model failure identification should always be used even if the overall model test passes. It is shown that the derived generalized reliability measures are suitable for the generalized KF estimation.     

基于中值滤波去噪和小波融合的乳腺图像增强方法

将小波变换的多分辨率分析理论应用于图像融合中,提出了一种既能改善图像整体对比度,同时也能增强乳腺图像的组织细节结构的方法.实验结果说明了该方法的有效性.     

一种H．264／AVC去方块效应滤波算法

针对去方块效应滤波的边界强度判断争滤渡过程计算量大的情况，本文提出了一种新的去方块效应滤波算法，分别对边界强度判断和穗渡过程的算法进行优化。综合两部分的优化算法，通过实验结果得知，降低的算法复杂度乎均值达到了9．82％、峰值信噪比（PSNR）乎均值也增加了0．119dB。该算法既降低了算法的复杂度又改善了压缩后视频的质量。     

定量评估试题库的方法

以定量的方法对试题库进行了质量分析，该方法充分反映了试题的客观规律．这为试题库的建设与质量管理提供了科学的依据，从而能够获得稳定、可靠的标准试卷．