基于多时相遥感影像的城市演变分析

以宁波市为例,利用十年间4个不同时相的遥感数据资料,在提取不同时期的中心城区范围线的基础上,从用地结构的变化入手进行分析城市空间发展的变化进程、规律,为促进城市理性增长和保障城市总体规划提供参考,对城市演变进行分析对城市未来的发展规划及合理布局具有借鉴意义。     

城市人性空间解析

在当前的城市规划中注重物质空间的规划设计,但能同时关照到人的身体与心灵的设计才是人性化设计追求的目标。城市需要人性空间,人性空间是对日常生活与人的关怀与尊重,对宜人小尺度的推敲,以及对历史文脉的探求。其核心在于空间场所的塑造和历史文化的滋养,由物质空间与自然人文等多重维度共同构成。     

Polychlorinated naphthalenes in air and snow in the Norwegian Arctic: a local source or an Eastern Arctic phenomenon?

PCNs were measured in air and snow during separate field campaigns at Ny-Alesund (April 2001) and Troms? (February/March 2003) in the Norwegian Arctic. Air concentrations ranged from 27 to 48 and 9 to 47 pg sigmaPCN m(-3) for Ny-Alesund (n=6) and Troms? (n=10), respectively. These concentrations (including the tri-chlorinated naphthalenes) greatly exceeded concentrations previously measured in the Canadian Arctic, but did fall within the upper range of concentrations observed over the eastern Arctic Ocean and regional seas. Local sources appear to be affecting concentrations observed at both sites, with the presence of several hexa-chlorinated naphthalenes at Troms? probably attributed to local/regional sources. Use of air mass back trajectories at Troms? revealed that background air concentrations in the Norwegian Arctic are likely to range between <9 and 20 pg sigmaPCN m(-3) and that contemporary concentrations derived close to potential sources (i.e. arctic towns) may equal or exceed those of PCBs. The mean concentration in surface snow was 350 and 240 pg sigmaPCN L(-1) (meltwater) (or 0.014 and 0.01 pg g(-1) (snow)) at Ny-Alesund and Troms?, respectively. The wide variation in concentrations observed between fresh snowfalls could be explained by different snow densities (as a surrogate of snow surface area), rather than attributed to varying air concentrations. A statistically significant inverse relationship was found between snow density and concentrations of tri- to penta-chlorinated homologues and compliments similar findings for the polychlorinated biphenyls (PCBs). This suggests that the vapour-sorbed quantity changes rapidly with snow ageing/compaction; with implications for the fate of these chemicals in the Arctic.     

混凝土早期强度推算法及实用分析

本文对＂成熟度法＂、＂等温强度龄期曲线法＂及＂等效龄期法＂介绍了其实际应用方法。通过实例对比计算发现三者有很大差距，并对差距产生的原因进行了初步分析，对其今后的使用提供了参考数据。     

高校研究生的心理适应及对策

随着高校研究生扩大招生 ,越来越多的学生加入到了研究生的队伍 ,面对迥然不同的教育模式 ,越来越多的学生表现出心理不适应。本文对其不适应的原因进行了深入分析 ,并从多角度提出了研究生心理调适的对策。     

我国现行结构抗火设计的问题及对策

分析了我国现行的结构抗火设计方法存在的与实际情况相差较大的弊端 ,叙述了我国结构抗火设计方面的理论与实验研究现状 ,提出了解决结构抗火设计及其研究有关方面的方法与对策     

家得宝目标——中国家居建材零售业魁首

全球最大的家居建材零售商——美国家得宝(The Home Depot)8月26日在北京宣布,对于去年12月13日从天津家世界家居建材超市有限公司(下称"家世界")收购而来的12家分店的整合工作已经完毕,家得宝由此正式进入中国市场。家得宝在中国     

布正伟新作八人谈——建筑创作多元化的理性概括：读布正伟先生《建筑视界论》有感

刚拿到这本书时．以为只是布正伟先生四十多年建筑创作生涯文论的汇总的集子．但稍静下来翻阅便发现，呈现给读者的《建筑视界论——现代建筑创作平台建构的理念与实践》为广大建筑师展示的是一幅将文化研析、城市体验、环境设计、职业修养融为一体的建筑创作理论的“风情画”．从而使国人关注的建筑创作的多元化理念得到尽情的阐发。     

Enzymatic biosensor for nitrite detection based on direct electron transfer by CPO-ILEMB/Au@MoS2/GC

Journal of Applied Electrochemistry - A novel nitrite electrochemical biosensor is constructed by glassy carbon electrodes (GC) coated by chloroperoxidase (CPO) -Au nanoparticles-MoS2 nanoflowers...     

Gas-Phase Treatment of Dump Tailings from Metallurgical Plants in Nitrating Media to Enhance Nickel Extraction

Theoretical Foundations of Chemical Engineering - A new approach to the processing of the dump waste product stored in the tailings dumps of the nickel production enterprise Punda Gourda (Cuba) has...