An Information Hiding Algorithm Based on Bitmap Resource of Portable Executable File

An information hiding algorithm is proposed, which hides information by embedding secret data into the palette of bitmap resources of portable executable （PE） files. This algorithm has higher security than some traditional ones because of integrating secret data and bitmap resources together. Through analyzing the principle of bitmap resources parsing in an operating system and the layer of resource data in PE files, a safe and useful solution is presented to solve two problems that bitmap resources are incorrectly analyzed and other resources data are confused in the process of data embedding. The feasibility and effectiveness of the proposed algorithm are confirmed through computer experiments.     

中国古代土地所有权问题刍议

中国传统社会是一个农耕社会,土地是社会生活中最主要的物质资源.探讨了中国古代土地所有权存在的基础,认为中国古代土地所有权是一个复合概念,它包含了公权与私权的相互混合,其产生、消灭及其具体内容在本质上表现出一种在国家权力作用下的所有权与他物权的混合性特征.     

Unscented Kalman filtering in the additive noise case

The unscented Kalman filter(UKF) has four implementations in the additive noise case,according to whether the state is augmented with noise vectors and whether a new set of sigma points is redrawn from the predicted state(which is so-called resampling) for the observation prediction.This paper concerns the differences of performances for those implementations,such as accuracy,adaptability,computational complexity,etc.The conditionally equivalent relationships between the augmented and non-augmented unscente...     

柔性软管敷设过程及安装计算分析

柔性软管有水平敷设方式和垂直敷设方式,2种敷设方式均可划分为4个敷设过程。介绍软管具体敷设过程及特点,论述软管安装计算分析理论。针对工程项目实例,依据软管敷设过程,进行柔性软管安装计算分析,确定软管敷设工作所需关键参数。研究工作可对柔性软管在海洋石油工程上的应用提供参考。     

某高档别墅地下室渗漏治理与改进措施

通过对某别墅地下室渗漏水的治理过程,说明防水设计的重要性,特别阐述了应针对具体情况设计科学合理的防水构造的理念。     

青岛市体育中心游泳跳水馆防水技术

介绍了青岛市体育中心游泳跳水馆的防水设计方案和施工工艺.从工程质量来看,所采用的美国雷帝(LATICRETE)防水系统效果优异,达到了预期的要求.     

三相共补复合开关的研制

功率因素过低对电网及负载有极大负面影响,在感性负载两端并接电容是常见的无功补偿方法。针对电磁开关和电力电子开关投切电容器在无功补偿装置应用中存在的问题,从分析功率因素补偿意义入手,提出三相共补开关拓扑结构及其电路模型,分析投切过程冲击电流形成机理及其避免对策。研制了一种基于AVR单片机在电压过零时投切并应用于低压无功补偿装置的复合开关。该复合开关的优点是电压过零时投切,冲激电流小;每相过零时触发中断,响应迅速快;采用了atmega16作为主控芯片,样机测试果表明达到设计之要求。     

Zn‐MOF‐74 Derived N‐Doped Mesoporous Carbon as pH‐Universal Electrocatalyst for Oxygen Reduction Reaction

It is of increasing importance to explore new low‐cost and high‐activity electrocatalysts for oxygen reduction reaction (ORR), which have had a substantial impact across a diverse range of energy conversion system, including various fuel cell and metal–air batteries. Although engineering carbon nanostructures have been widely explored as a candidate class of Pt‐based ORR electrocatalysts owing to their proved high activity, outstanding stability, and ease of use, there still remains a daunting challenge to develop high activity metal‐free electrocatalysts in pH‐universal electrolyte system. Here, a reliable and controllable route amenable to prepare nitrogen‐doped porous carbon (NPC) with high yields and exceptional quality is described. The as‐prepared NPC shows advantages of high activity, high durability, and methanol‐tolerant as an efficient pH‐universal electrocatalyst for ORR, showing comparable or even better activity as compared with the commercial Pt/C catalysts not only in alkaline media but also in acidic and neutral electrolyte. Systematic electrochemical studies, combining with density functional theory calculation, demonstrate the unique nitrogen‐doping species and favorable pores in the as‐designed NPC synergistically contribute to the significantly improved catalytic activity in pH‐universal medium. The present work potentially presents an important breakthrough in developing ORR electrocatalysts for various fuel cells.     

基于大数据和AI的智能化PeOTN-CO价值分级建网创新与实践

对某省联通PeOTN-CO价值分级建网方法论及实践进行了论述,通过市场空间大数据分析、AI算法及存量政企专线路径和流量等分析,对全省综合业务接入区(CO)进行价值分级,提出聚类标杆配置模型,优先预覆盖高价值综合业务接入点,次优先覆盖中低价值区域,实现政企精品网的价值精准建网,进而全面实现以PeOTN技术为主的本地光网络边缘延伸,打造智能光网络,适配新基建时代的“大带宽”“低时延”等业务需求特征,有效降低网络成本并提高短期投资回报率。