基于小波估计和直方图特征的LSB匹配分析

针对隐写分析中的难点——空域LSB匹配隐写进行检测和分析,描述LSB匹配加性隐写的特点,将匹配隐写建模为图像受到一定强度的脉冲噪声干扰,采用小波变换对退化的图像进行恢复作为载体的估计。对检测图像和恢复图像提取多个直方图特征比值作为特征向量,利用支持向量机对500幅高质量未压缩的自然图像组成的载体、载密图像库进行检测,结果证明该算法在低嵌入率下可获得较好的检测效果。     

On the probability theory on MV algebras

 The paper contains a review of some results concerning probability theory on MV algebras (laws of large numbers, central limit theorem, martingale convergence theorem). Also some algebraic and methodical aspects are discussed.     

Measuring the economic benefits of the Youngsan River Restoration Project in Kwangju,Korea, using contingent valuation

This study examines the economic benefits of a river restoration project in the Youngsan River, Kwangju, Korea, using a contingent valuation method. It employs a spike model to address the high proportion of zero responses. The results indicate that a household's annual mean willingness to pay is KRW3410 in Kwangju and KRW1744 in other regions. The resulting benefit-cost ratio is 2.29, indicating that the project would be socially profitable, and that households appear willing to support it financially.     

宽频介电谱仪热激励去极化电流功能研究

利用宽频介电谱仪拓展热激励去极化电流模块测量介质材料的TSDC操作简单实用,它不仅容易把材料中的各种不同活化能或弛豫时间的荷电粒子区分开,并且能从TSDC谱中直接得出被测材料的介电性能以及相关微观参数,这为研究材料内部机理提供了一条捷径。     

A weighted H1 seminorm regularization method for Fredholm integral equations of the first kind

Many problems in mathematics and engineering lead to Fredholm integral equations of the first kind, e.g. signal and image processing. These kinds of equations are difficult to solve numerically since they are ill-posed. Therefore, regularization is required to obtain a reasonable approximate solution. This paper presents a new regularization method based on a weighted H¹ seminorm. Details of numerical implementation are given. Numerical examples, including one-dimensional and two-dimensional integral equations, are presented to illustrate the efficiency of the proposed approach. Numerical results show that the proposed regularization method can restore edges as well as details.     

浅析金鸡拦河闸重建工程的环境保护与防治控制

论述了泉州市金鸡拦河闸重建工程的意义,分析了重建工程对河道上下游水生态环境的影响,提出了环境保护与污染防治措施。     

80 kt/a硫铁矿制酸扩建装置采用的新技术措施

针对采用水洗净化工艺的某80kt/a硫铁矿制酸装置的扩建设计，介绍了其中主要改扩建工段及设备采用的新技术措施，设计中对原料工段、沸腾炉、文氏管、泡沫塔、转化器、换热器等进行了改进，满足了厂方两期建设产量不同的要求。     

DTM320／580型磨煤机传动齿轮轴断裂原因分析及防范措施

介绍了DTM580/320型磨煤机传动齿轮轴断裂的情况,并进行了分析;找到了断裂的原因,提出了防范措施。     

基于PLC的配料计量装置的设计

冶金生产中，各种原料之间的配比精度对生产过程的稳定和产品的质量有重要的影响。目前使用的配料系统计量精度低，瞬时物料流量波动大，系统复杂。本文介绍的计量装置的计量过程是对料斗内物料的减少量进行计量，以减重秤为主，配料精度达到0．5％级。     

Solaris下综合教务系统的管理和维护

对于Solaris下综合教务系统的管理和维护,本文从系统的优化调整,备份、恢复策略,系统安全保护措施等三个方面进行了探讨。