Study on one-dimensional consolidation of saturated soil with semi-pirviovs boundaries and under cyclic loading

The variation of effective stress ratio of stratfied soil with semi-pervious boundaries and under cyclic loading was analyzed on the basis of Terzaghi's one-dimensional consolidation assumptions. A solution by Laplace Transform was obtained for the case when the soil was under time-varied loading. With numerical inversion of Laplace Transform, some useful results were obtained for several kinds of commonly encountered loadings. The results can be meaningful in engineering practice.     

基于小波变换的数字监控图像增强的分析

小波变换因其所具有的多分辨率分析能力和时频局部化能力，使其在数字图像处理应用中具有非常大的优势．本文给出了一种基于小波变换的数字监控图像增强的方法，它具有一定的实用和参考价值．     

幂等距阵的对角化问题

本对幂等距阵的对角化给出两种证明，并利用距阵的秩来求线性变换的核和像的维数。     

Bayesian Quantile Structural Equation Models

Structural equation modeling is a common multivariate technique for the assessment of the interrelationships among latent variables. Structural equation models have been extensively applied to behavioral, medical, and social sciences. Basic structural equation models consist of a measurement equation for characterizing latent variables through multiple observed variables and a mean regression-type structural equation for investigating how explanatory latent variables influence outcomes of interest. However, the conventional structural equation does not provide a comprehensive analysis of the relationship between latent variables. In this article, we introduce the quantile regression method into structural equation models to assess the conditional quantile of the outcome latent variable given the explanatory latent variables and covariates. The estimation is conducted in a Bayesian framework with Markov Chain Monte Carlo algorithm. The posterior inference is performed with the help of asymmetric Laplace distribution. A simulation shows that the proposed method performs satisfactorily. An application to a study of chronic kidney disease is presented.     

一种基于DCT域与图像置乱的数字水印算法研究

提出了一种将水印图像进行Arnold置乱后嵌入到经DCT域进行变化的载体图像中的数字水印算法。算法研究结果表明水印具有较好的不可见性及健壮性。同时,文中采用不同图像处理方式对嵌入水印后的图像进行了攻击实验,实验表明该算法对于JPEG压缩具有较好的鲁棒性。     

基于Matlab的RLC阻尼振荡电路建模与仿真研究

通过建立RLC阻尼振荡电路的系统模型,得到三种不同的阻尼振荡类型及其通解的形式,利用M atlab程序对后两类阻尼振荡电路的时域和频域进行编程描述,对此两者仿真波形,证实了两种方法的有效性,同时指出了第5条临界阻尼非振荡波形失真的原因。     

梅祖麟《有中国特色的汉语历史音韵学》讲辞质疑

章太炎、黄侃、王力诸前贤,对上古音的研究,成果斐然,贡献很大。有人蔑之为“根本不是语言学”,不仅无知,而且轻狂。     

对我国增值税转型问题的思考

我国的生产型增值税转型为消费型增值税已进入了成熟阶段，增值税的转型是适应我国经济发展需要的必然选择。本文探讨了增值税转型对中国经济的影响。     

论我国学校教育督导评估范式的转型策略

建立适应新课程范式的学校教育督导评估范式,应该从理念上建构“一切为了学生发展”的科学发展观;在功能上应体现民主协商、过程激励和持续发展;在体制上建立与教育行政部门并行的教育督导评估机构,健全学校自我评估制度,建立第三方评估制度;在职能上实现由“重督向重导”转型,突出指导性、服务性;在队伍素质上规范管理,实施准入制度、完善督学制度;在模式上积极创新和采用灵活多样的个性化评估模式,尊重学校差异,支持学校特色发展;在方法上主要由传统量化评估方法转向以质性评估方法统整量化评估方法;在评估结果上建立公开、开放、民主的教育督导评估结果报告和反馈制度。     

Refreshing File Aggregate of Distributed Data Warehouse in Sets of Electric Apparatus

Integrating heterogeneous data sources is a precondition to share data for enterprises. Highly-efficient data updating can both save system expenses, and offer real-time data. It is one of the hot issues to modify data rapidly in the pre-processing area of the data warehouse. An extract transform loading design is proposed based on a new data algorithm called Diff-Match, which is developed by utilizing mode matching and data-filtering technology. It can accelerate data renewal, filter the heterogeneous data, and seek out different sets of data. Its efficiency has been proved by its successful application in an enterprise of electric apparatus groups.