提高水旱灾害防御能力 为汉川跨越式发展提供有力保障

湖北省汉川市地处江汉平原腹地,有长江最大支流汉江横贯全境,是一个襟江带湖的平原水网地区;境内地势低洼,河渠纵横,素有＂水袋子＂和＂千里汉江,险在汉川＂之称,是一个洪涝灾害频发的地方。     

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.     

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...     

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.     

液氯汽化工艺的改进

通过对原有液氯汽化工艺的分析,找出了其存在的若干问题,针对这些问题,对液氯汽化工艺进行了改进,提出了液氯热水两级汽化,并应用于生产,取得了可观的经济效益,值得在氯化行业特别是中小企业推广应用。     

孕镶金刚石绳索取心钻头的研制与应用

为了达到绳索取心钻探对钻头的特殊要求,本文从分析钻头胎体性能出发,着重从胎体配方、金刚石参数、钻头水路系统等方面进行优化设计,通过多种配方的室内和野外试验对比,最后使得钻头具备良好的适应性,钻进硬-坚硬、中-弱研磨性岩层时克服了打滑现象,从而提高了钻头时效,延长了钻头寿命。     

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.     

The combined system for fuel supply of fuel cells on the basis of the aluminum-water hydrogen generator and the metal hybride hydrogen storage

The system for fuel supply of a hydrogen-air fuel cell on the basis of the aluminum-water hydrogen generator and hydride-forming alloy as an intermediate gas storage has been developed. For a series of general composition alloys LaNi_{4.5 − x} Al _x CO_0.5 service life evaluation tests with the use of highly wet hydrogen were carried out. The possibility of absorption and release of hydrogen by hydride-forming alloys with the rate that corresponds to technical parameters of the system has been shown, and it was found that hydrogen storage capacity is unaffected by high wetness of hydrogen.