共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
某展览厅屋盖为斜放四角锥焊接空心球节点网架,平面尺寸36m×40m,高3m。网架采用地面组焊小拼单元、高空滑移就位、总拼的施工方案,安装时搭设满堂脚手架。为确保焊接质量,采取了相应的技术措施,技术经济效果良好。 相似文献
3.
4.
5.
红色纪念馆是记载重要历史事件、纪念伟大革命人物、传承红色革命精神的空间载体,引导观众产生情感共鸣是纪念馆设计的重要目标.在历史街区中的红色纪念馆设计,更加注重对街区历史文脉的解读和对纪念性建筑场所精神的表达.文章结合中国共产党第一次全国代表大会纪念馆建设实践,从建筑与新天地历史街区的城市关系出发,提出了保留城市肌理、统一空间尺度、塑造立面符号、遵循色彩材质、整合街区动线的五大设计原则,为其他历史街区红色纪念馆的新建与改建提供设计参考. 相似文献
6.
7.
8.
9.
本文以杭州奥体博览城网球主场馆的设计为例,针对体育建筑的可开启屋面设计技术进行了探讨。 相似文献
10.
11.
12.
13.
14.
Recent advances in removing phosphorus from wastewater and its future use as fertilizer (1997-2003) 总被引:37,自引:0,他引:37
Large quantities of phosphate present in wastewater is one of the main causes of eutrophication that negatively affects many natural water bodies, both fresh water and marine. It is desirable that water treatment facilities remove phosphorus from the wastewater before they are returned to the environment. Total removal or at least a significant reduction of phosphorus is obligatory, if not always fulfilled, in most countries. This comprehensive review summarizes the current status in phosphorus-removal technologies from the most common approaches, like metal precipitation, constructed wetland systems, adsorption by various microorganisms either in a free state or immobilized in polysaccharide gels, to enhanced biological phosphorus removal using activated sludge systems, and several innovative engineering solutions. As chemical precipitation renders the precipitates difficult, if not impossible, to recycle in an economical industrial manner, biological removal opens opportunities for recovering most of the phosphorus and beneficial applications of the product. This review includes the options of struvite (ammonium-magnesium-phosphate) and hydroxyapatite formation and other feasible options using, the now largely regarded contaminant, phosphorus in wastewater, as a raw material for the fertilizer industry. Besides updating our knowledge, this review critically evaluates the advantage and difficulties behind each treatment and indicates some of the most relevant open questions for future research. 相似文献
15.
《Planning》2014,(5):11-12
习近平主席关于构建丝绸之路经济带的倡议,启发我们对丝绸之路进行重新审视。从战略价值看,丝绸之路经济带是远远高于丝绸之路的一个全新的概念,是丝绸之路的升华,体现了我国战略方面的全新思维,将影响我国经济的长远部署,是经济领域事关我国世界地位的重要战略考虑,可以形成我国改革开放新的前沿,是影响未来世界的一件大事,探讨并落实丝绸之路经济带的构建和发展是我国很长一段时期内的重要任务。然而,如果没有物流的基础和支持作用,任何地区的发展和对外沟通都会受到制约,丝绸之路经济带的开发和建设必须物流先行,要下大力气进行现代物流系统建设。为更好地奠定丝绸之路经济带的物流基础,我们必须注重物流"桥头堡"的建设;注重当地公路、铁路的综合发展;认真解决能够促使丝绸之路经济带与世界经济直接进行交往和沟通的物流通道问题;配合西部地区城市化的发展,规划和建设物流中心;在进行物流系统建设的同时,除针对货物运输之外,还要解决东西部地区、西部地区与国际间人员的交往及观光旅游等需求;开展大规模物流国际合作,实现国内物流贯通,使物流以新的体制和结构内容来满足丝绸之路经济带的需要。 相似文献
16.
17.
18.
介绍了特种结构造粒塔悬空74.97m结构柔性悬索结构模板支撑体系的设计,有效利用了永久结构本身的承载能力,充分考虑到施工过程各项工况条件的影响。 相似文献
19.
Polixeni A. Iliopoulou 《Papers in Regional Science》1988,64(1):137-153
ABSTRACT In this paper an evaluation of the Regional Development Incentives Policy in Greece is presented for the 1972-87 period. The main argument in this evaluation is that the incentives polity had limited impact on private investment decisions and, instead, facilitated existing trends in the sectoral composition and spatial distribution of private investment. The empirical evidence in support of tins argument indicates that subsidised investment did not prefer the sectors and regions where the incentives were stronger, while its sectoral and spatial distribution was similar to nonsubsidised investment. A case study for one of the problem regions confirmed these results and gave rise to questions about the appropriateness of the incentives policy for the Greek regional problem. 相似文献