一种基于视频的DEW水印算法

采用差分能量水印(DEW)算法,对视频数字作品进行了数字水印的嵌入、检测和提取研究。实验结果表明,该算法计算简单、速度快、易于实现,视频信号里可编码的数据量大,可以隐藏较多的信息,并且还可以满足水印的实时嵌入和提取。     

谈压缩映象原理及其应用

文章介绍了压缩映象原理及其在解决线性方程组、隐函数存在性、常微分方程和Volterra积分方程解的存在唯一性等四个方面的重要应用.     

具有非线性边界条件的拟线性系统的奇摄动

本文研究具有非线性边界条件的拟线性系统的奇摄动，在适应的假设条件下利用微分不等式理论证明了摄动解的存在唯一性，并给出了解的按分量直到O（ε^N 1）阶的一致有效的估计。     

拟Riccati方程的可积性

利用不变量思想,研究微分方程y′=P(x)yn Q(x)yn-1 R(x)y S(x)的可积性,给出可积的条件.     

考虑半轴齿轮摩擦力矩条件下的差速器转矩分配原理

在考虑差速器半轴齿轮摩擦力矩条件下，根据对半轴齿轮的受力分析，重新确定了差速器内摩擦力矩所含内容，进一步论述了差速器转矩分配原理。     

An efficient method for parallel CRC automatic generation

The State Transition Equation (STE) based method to automatically generate the parallel CRC circuits for any generator polynomial or required amount of parallelism is presented. The parallel CRC circuit so generated is partially optimized before being fed to synthesis tools and works properly in our LAN transceiver. Compared with the cascading method, the proposed method gives better timing results and significantly reduces the synthesis time, in particular. Project (No. 60271010) supported by the National Natural Science Foundation of China     

关于清代著名数学家李善兰

介绍清代著名数学家李善兰的主要成就,并给出了两点注记.     

Time to seize the digital evolution: Adoption of blockchain in operations and supply chain management among Malaysian SMEs

This study aims to investigate the effects of relative advantage, complexity, upper management support, cost, market dynamics, competitive pressure and regulatory support on blockchain adoption for operations and supply chain management among Small-Medium Enterprises (SMEs) in Malaysia. Unlike existing studies that employed linear models with Technology Acceptance Model or United Theory of Acceptance and Use of Technology that ignores the organisational and environmental factors, we adopted the Technology, Organisation and Environment Framework that covers the technological dimensions of relative advantage and complexity, organisational dimensions of upper management support and cost and environmental dimensions of market dynamics, competitive pressure and regulatory support. Empirical data from 194 SMEs were investigated and ranked using a nonlinear non-compensatory PLS-ANN approach. Competitive pressure, complexity, cost and relative have significant effects on behavioural intention. Market dynamics, regulatory support and upper management support were insignificant predictors. SMEs often lack resources for technological investments but faces same requirements for streamlining business processes to optimise returns and blockchain presents a viable option for SMEs’ sustainability due to its features of immutability, transparency and security that have the potential to revolutionise businesses. This study contributes new knowledge to the literature on factors that affect blockchain adoption and justifications were discussed accordingly.     

Accessible service delivery of child welfare services and differential response models

This article presents the results of a study of the impacts of accessible neighborhood and school service delivery formats for front-line child protection services within a flexible response model of child welfare in southwest Ontario, Canada. More specifically, this article looks at the contributions that these accessible service delivery models made to: (a) clients willingness to ask for help, (b) establishing constructive helping relationships, (c) accessing services and supports, (d) bridging the gap between mandated and supportive services, and (e) community engagement. The article also shows how the existing child protection service template constrained the accomplishments possible through these service delivery innovations. Accessible and central service delivery sites differed in notable ways in each of these areas.     

On nonlinear systems diagnosis using differential and algebraic methods

In this paper we tackle the diagnosis problem in nonlinear systems under failure using differential algebra. Three examples are presented in order to apply the proposed methodology. Numerical simulations of these examples are presented to illustrate the effectiveness of the suggested approach.