期刊文献+
共找到30篇文章
< 1 2 >
每页显示 20 50 100
基于弹塑性地震响应的轻型消能摇摆架-框架结构损伤性能分析 被引量:1
1
作者 杜永峰 祁磊 +1 位作者 包超 张文丽 《工程抗震与加固改造》 北大核心 2016年第1期98-104,共7页
轻型消能摇摆架-框架结构作为一种新的结构体系,要将其应用于工程实际中,还需要大量理论分析和试验研究的支持。本文以一栋5层钢筋混凝土框架结构为原型,利用Open Sees有限元软件建立钢筋混凝土(RC)框架结构、摇摆架-框架结构、轻型消... 轻型消能摇摆架-框架结构作为一种新的结构体系,要将其应用于工程实际中,还需要大量理论分析和试验研究的支持。本文以一栋5层钢筋混凝土框架结构为原型,利用Open Sees有限元软件建立钢筋混凝土(RC)框架结构、摇摆架-框架结构、轻型消能摇摆架-框架结构的模型。首先利用单条地震动对三种模型进行弹塑性动力时程分析,从而对其局部损伤进行研究;然后选用20条地震动对结构进行增量动力分析(IDA分析),利用概率统计分析方法对于三种模型的整体损伤情况进行统计和分析。依据损伤指数可以对结构局部和整体损伤分布情况做出较好的评判,分析结果表明:增设轻型摇摆架能够提高结构的抗震能力,改善结构损伤机制,添加自复位消能支撑更可以优化结构耗能机制,大幅降低结构整体损伤程度。 展开更多
关键词 轻型消能摇摆-框架结构 增量动力分析(IDA) 损伤指数 局部损伤 整体损伤
下载PDF
催化层掺杂共价有机框架材料提升高温聚电解质膜燃料电池性能 被引量:3
2
作者 田立亮 张玮琦 +5 位作者 解政 彭凯 马强 徐谦 Sivakumar Pasupathi 苏华能 《物理化学学报》 SCIE CAS CSCD 北大核心 2021年第9期218-224,共7页
基于磷酸掺杂聚苯并咪唑(PBI)高温聚电解质膜燃料电池(HT-PEMFC)具有环境耐受性好、水热管理简单等优点,被认为是未来PEMFC的发展方向。而减少其运行过程中磷酸电解质的流失是维持HT-PEMFC性能稳定性的关键因素。在本工作中,我们提出在... 基于磷酸掺杂聚苯并咪唑(PBI)高温聚电解质膜燃料电池(HT-PEMFC)具有环境耐受性好、水热管理简单等优点,被认为是未来PEMFC的发展方向。而减少其运行过程中磷酸电解质的流失是维持HT-PEMFC性能稳定性的关键因素。在本工作中,我们提出在电极催化层中引入一种席夫碱型(SNW-1)共价有机框架(COF)材料的策略来减少膜电极(MEA)中的磷酸流失,从而增强HT-PEMFC的耐久性。由于该COF材料中大量与磷酸分子匹配的微孔和特定的官能团结构,使其不仅拥有优越的磷酸保留能力,而且具有良好的质子传导能力,因此该HT-PEMFC在电池加速老化测试中展现出很好的稳定性。此外,发现在催化层中引入5%–10%的COF材料,可有效提高电极电化学活性面积并降低电池的欧姆内阻和电荷转移电阻,从而可进一步提高HT-PEMFC放电性能。在150℃、氢/空和常压操作条件下,工作电压0.6 V时催化层中添加10%COF材料的电池电流密度达到0.361 A·cm^(−2),较常规电池性能提升30%左右。该工作说明在催化层中掺杂适量COF材料有希望成为提升HT-PEMFC性能和耐久性的一种有效策略。 展开更多
关键词 高温聚电解质膜燃料电池 膜电极 有机框架 磷酸流失 稳定性
下载PDF
基于OptiStruct飞机装配型架框架结构的优化设计 被引量:2
3
作者 李凯旋 《航空制造技术》 2011年第8期73-75,79,共4页
建立了飞机装配型架框架优化设计的数学模型;首先对型架框架进行拓扑优化,确定框架的拓扑结构;然后对框架进行截面尺寸优化,确定梁的最终截面尺寸。通过与初始结构的对比,证明了优化设计所取得的效果。
关键词 飞机装配型框架 优化设计 数学模型 拓扑优化 尺寸优化
下载PDF
导轨框架势爬架在大层高建筑中的应用
4
作者 张国栋 《新材料·新装饰》 2020年第24期125-126,共2页
文章首先阐述了大层高建筑导轨框架势爬架的设计理念及优势,说明了导轨框架势爬架施工方案,分析了导轨框架势爬架的安装工作,提出了导轨框架势爬架的质量及安全控制措施。
关键词 大层高建筑 导轨框架势爬 施工方案
下载PDF
建筑施工中高支模工程施工技术应用与安全管理 被引量:11
5
作者 齐胜利 《居业》 2023年第8期32-34,共3页
针对太原市人民医院(晋源区人民医院)迁建工程项目二期工程康复诊疗中心B区,高支模工程安全专项施工方案的施工工艺技术、安全措施保证、验收标准以及应急处理措施等举措,通过参考相应技术标准和相关图纸设计可进行实施性工作。
关键词 高支模 体与框架 钢材 平板振捣器 脚手
下载PDF
长沙象山国际幼儿园装配式钢木混合结构关键问题研究 被引量:2
6
作者 陈宇 艾辉军 +3 位作者 王四清 夏心红 刘祥南 杨瑛 《建筑结构》 北大核心 2023年第23期63-71,56,共10页
长沙象山国际幼儿园为湖南首座绿色装配式钢木混合结构示范项目,采用胶合木框架支撑-钢框架混合结构,位于结构中部的钢框架和两侧的胶合木框架支撑结构水平连接,协同受力。对其钢木混合结构、木楼板振动舒适度、中庭网壳和旋转坡道结构... 长沙象山国际幼儿园为湖南首座绿色装配式钢木混合结构示范项目,采用胶合木框架支撑-钢框架混合结构,位于结构中部的钢框架和两侧的胶合木框架支撑结构水平连接,协同受力。对其钢木混合结构、木楼板振动舒适度、中庭网壳和旋转坡道结构、木结构单元房、防火设计进行了研究。结果表明:钢木混合结构整体模型考虑木搁栅楼板实际平面内刚度后,抗侧刚度有明显降低,但考虑木结构节点刚度和木搁栅楼板平面内刚度更多是影响构件内力和节点内力;提出了木楼板人致振动舒适度控制指标,经计算,班级活动室大跨木楼盖舒适度满足要求;对中庭伞状网壳中心圆筒与坡道的连接、结构稳定性、旋转坡道悬挑端舒适度进行专项分析,保证了其安全适用;对木结构单元房和主体构成的叠箱-框架(支撑)结构进行大震非线性时程分析,连接满足大震弹性要求;采取建筑消防设计、结构防火设计、防火构造措施等方法保证了项目防火性能优于规范要求。 展开更多
关键词 装配式结构 胶合木框架支撑-钢框架混合结构 木结构节点 木搁栅楼板 木结构单元房 舒适度分析
下载PDF
Framework for integration of SOA and Web2.0
7
作者 左美云 张子柯 李倩 《Journal of Southeast University(English Edition)》 EI CAS 2007年第3期418-420,共3页
To avoid the isolation between the external and the internal information of enterprise information systems, a four-layer integrated framework is proposed on the basis of integrating Web2. 0 and the service- oriented a... To avoid the isolation between the external and the internal information of enterprise information systems, a four-layer integrated framework is proposed on the basis of integrating Web2. 0 and the service- oriented architecture (SOA), which contains the data layer, the service layer, the presentation layer and the collaboration layer. The presentation layer plays the key role, converging the external information from the collaboration layer to the inside of information system (IS), and diffusing the internal information from the service layer to public users. This framework can also illustrate how users contribute to producing new services, and how web services are integrated to collaborate with public users. 展开更多
关键词 FRAMEWORK information system service-oriented architecture Web2. 0 INTEGRATION
下载PDF
CO_2/CH_4 and CH_4/N_2 separation on isomeric metal organic frameworks 被引量:6
8
作者 Xiaoqing Wang Libo Li +1 位作者 Jiangfeng Yang Jinping Li 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2016年第12期1687-1694,共8页
Two isomeric metal-organic frameworks(MOFs) with 2-dimensional(2D) and 3-dimensional(3D) topologies both comprised of Cu(Ⅱ) and OTf(OTf = trifluoromethanesulfonate) ions were synthesized and characterized.The CO_2,CH... Two isomeric metal-organic frameworks(MOFs) with 2-dimensional(2D) and 3-dimensional(3D) topologies both comprised of Cu(Ⅱ) and OTf(OTf = trifluoromethanesulfonate) ions were synthesized and characterized.The CO_2,CH_4 and N_2 adsorption properties of the two isomeric MOFs were investigated from 263 K to 298 K at0.1 MPa.The results showed that the 2D MOF exhibited a higher selectivity for CO_2 from CO_2/CH_4 and CH_4from CH_4/N_2 compared to the 3D MOF,even though it possessed a lower surface area and pore volume.The higher adsorption heats of gases on the 2D MOF inferred the strong adsorption potential energy in the layered MOFs.Dynamic separation experiments using CO_2/CH_4 and CH_4/N_2 mixtures on the two MOFs proved that the2 D MOF had a longer elution time than the 3D MOF as well as better separation abilities. 展开更多
关键词 Metal–organic frameworks Isomeric frameworks Adsorption Separation
下载PDF
Ionic covalent organic frameworks for highly effective catalysis 被引量:4
9
作者 HuiHua QianqianYana +4 位作者 MingWanga LiYub WeiPanc BaoshanWangd YananGao a 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第9期1437-1444,共8页
As an emerging class of crystalline porous materials, covalent organic frameworks(COFs) have been widely used as catalysts or catalyst supports. Flexible regulation of the pores and easy introduction of functional a... As an emerging class of crystalline porous materials, covalent organic frameworks(COFs) have been widely used as catalysts or catalyst supports. Flexible regulation of the pores and easy introduction of functional active sites onto the skeleton of COFs make them promising platforms for many catalysis applications. However, only a single function is generally observed in these COFs. Herein, we synthesized a negatively charged ionic COF(I-COF) and successfully incorporated functionalized counter ions, that is, metallic Mn2+ and a coordination complex of manganese(Ⅱ) bipyridine complexes([Mn(bpy)2]2+), via a simple ion exchange process. The resulting I-COFs can act as effective heterogeneous catalysts for epoxidation reactions. We envisage that with this type of ionic architecture, a variety of other functional cations could be exchanged into the frameworks, thus making the COF a versatile platform for different applications. 展开更多
关键词 Covalentorganic framework Ionicar chitecture Catalyst EPOXIDATION Porousmaterial
下载PDF
EU and international policies for hydrometeorological risks:Operational aspects and link to climate action
10
作者 Philippe QUEVAUVILLER Marco GEMMER 《Advances in Climate Change Research》 SCIE CSCD 2015年第1期74-79,共6页
Changes in hydrometeorological characteristics and risks have been observed and are projected to increase under climate change. These considerations are scientifically well studied and led to the development of a comp... Changes in hydrometeorological characteristics and risks have been observed and are projected to increase under climate change. These considerations are scientifically well studied and led to the development of a complex policy framework for adaptation and mitigation for hydrometeorological risks. Awareness for policy actions is growing worldwide but no legal framework is in place to tackle climate change impacts on water at a global scale. With the example of international frameworks and the legislation on EU-level, this article elaborates that hydrometeorological risks are not considered in the framework of one single policy. However, various policy instruments are directly or indirectly considering these risks at different operational levels. It is discussed that a tailor-made framework for hydrometeorological risks would improve coordination at international or national level. A major drawback for a single operational framework is that hydrometeorological risks are scientifically tackled in two large communities: the disaster risk reduction community and the climate change adaptation community, both of which are bound to different research and operational funding budgets. In future, disaster risk reduction and climate change adaptation will need been seen as a complementary set of actions that requires collaboration. 展开更多
关键词 Hydrometeorological risks Disaster risk reduction POLICY European Union
下载PDF
Optimum Design of Outrigger and Belt Truss Systems Using Genetic Algorithm 被引量:2
11
作者 Radu Hulea Bianca Parv Monica Nicoreac Bogdan Petrina 《Journal of Civil Engineering and Architecture》 2014年第6期709-715,共7页
There are many structural lateral systems used in tall buildings: rigid frames, braced frames, shear walls, tubular structures and core structures. The outrigger and belt truss systems are efficient structures for dr... There are many structural lateral systems used in tall buildings: rigid frames, braced frames, shear walls, tubular structures and core structures. The outrigger and belt truss systems are efficient structures for drift control and base moment reduction in tall buildings where the core alone is not rigid enough to resist lateral loads. Perimeter columns are mobilized for increasing the effective width of the structure, and they developed tension in the windward columns and compression in the leeward columns. Optimum locations for the outriggers have been studied because of the influence on the top displacement and base moment in the core. It was analyzed the optimal position for two to seven outriggers and belt trusses, aiming to achieve minimum bending moment and minimum drift. 展开更多
关键词 Outrigger system optimum location genetic algorithm.
下载PDF
T型角缝超声波探伤测位选择与层状撒裂判定
12
作者 李建利 《包钢科技》 1997年第4期122-124,共3页
本文介绍了框架结构中T型角焊缝超声波探伤检测位置的选择.角焊缝中出现层状撕裂时的波形显示,以便对层状撕裂进行正确判定.
关键词 角焊缝 层状撕裂 缺陷判定 超声波探伤 框架
下载PDF
Design and Implementation of University Fixed Assets Management System
13
作者 LiZHENG 《International Journal of Technology Management》 2015年第2期25-27,共3页
This paper uses the J2EE framework, and proposed the development methods of the fixed assets management system in the Spring platform and the Struts. At the same time, the paper elaborates on the fixed assets manageme... This paper uses the J2EE framework, and proposed the development methods of the fixed assets management system in the Spring platform and the Struts. At the same time, the paper elaborates on the fixed assets management system under the framework of Spring and Struts technology, and lists some core code and part function description. Through the operation of the system many times, proved that the technology can improve the safety and stability of the system, both the Spring and the Struts framework also made redundant code of the system to reduce, avoid the waste of resources, which make the system have better scalability and maintainability. 展开更多
关键词 University fixed assets management J2EE the Struts2 Spring Framework
下载PDF
Design of Dissipative Braces for an Existing Strategic Building with a Pushover Based Procedure
14
作者 Alessandro Vittorio Bergami Camillo Nuti 《Journal of Civil Engineering and Architecture》 2014年第7期815-823,共9页
The research presented in this paper deals with the seismic protection of existing frame structures by means of passive energy dissipation. An iterative displacement-based procedure, based on capacity spectrum, to des... The research presented in this paper deals with the seismic protection of existing frame structures by means of passive energy dissipation. An iterative displacement-based procedure, based on capacity spectrum, to design dissipative bracings for seismic retrofitting of the frame structures is described, and some applications are discussed. The procedure can be used with any typology of dissipative device and for different performance targets. In this work, the procedure has been applied, with both traditional pushover (load profile proportional to first mode) and multimodal pushover, to an existing RC (reinforced concrete) frame building. In the application, the buckling restrained braces have been used in order to prevent damages to both the structure and non structural elements. The use of multimodal pushover proves to be more effective than pushover based on single mode in case of medium rise RC frame building (higher than 30 m) but, once this building is retrofitted, and therefore regularized, with a bracing system, the difference between using monomodal or multimodal pushover becomes insignificant. 展开更多
关键词 Dissipative braces earthquake engineering energy dissipation seismic retrofitting.
下载PDF
Case Study of Service Oriented Enterprise Architecture Framework
15
作者 Nassir Dino Awel Dico +1 位作者 Dida Midekso Worku Alemu 《Computer Technology and Application》 2012年第3期240-249,共10页
Many organizations have now adopted Service Oriented Architecture (SOA) as an architectural style to help them with architecture, design and implementation of their core services and systems. Most of these organizat... Many organizations have now adopted Service Oriented Architecture (SOA) as an architectural style to help them with architecture, design and implementation of their core services and systems. Most of these organizations are challenged in integrating SOA style with their overall Enterprise Architecture work. This framework links an SOA style with the Enterprise Architecture (EA) methodologies to help organizations organize their SOA effort as a key part of their Enterprise Architecture. The case study demonstrates the implementation of architecture goal with organization vision in service oriented organizational structure using services that align Business with Technology. The framework is validated and has reserved the privileges of SOA and EA. 展开更多
关键词 SOA (service oriented architecture) EA (enterprise architecture) service oriented enterprise (SOE) SOE strategicarchitecture SOE domain architecture SOE solution architecture SOE lifecycle service oriented enterprise architecture (SOEA)framework.
下载PDF
Optimum design of lander structure based on finite element method
16
作者 王闯 刘荣强 +1 位作者 邓宗全 高海波 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2009年第1期21-26,共6页
Three kinds of possible structures of legged lander including monocoqe, semi-monocoqe and space frame are compared, and the lightest space frame structure is selected as the lander's structure. Then, a new lander ... Three kinds of possible structures of legged lander including monocoqe, semi-monocoqe and space frame are compared, and the lightest space frame structure is selected as the lander's structure. Then, a new lander with four-legged truss structure is proposed. In the premise of ensuring that the main and assistant structures of landing legs are not changed, six possible lander body structures of the new lander are put forward. Taking the section size of each component of lander as design variables, and taking the total mass of the structure as the objective function, the six structures are analyzed by using the software Altair. OptiStruct and the results show that the mass of the basic structure is the lightest, and it is selected as the final design scheme of lander due to its simple structure and convenient manufacture. The optimization on the selected lander structure is conducted, and the detailed results are presented. 展开更多
关键词 LANDER space frame OPTIMIZATION OptiStruct
下载PDF
Design and construction of high and large span cast-in-place reinforced concrete cantilever flowering frame beam
17
作者 WANG Rui ZHEN Liang +2 位作者 WAN Chao WU Jing SHEN Yan-jun 《Journal of Civil Engineering and Architecture》 2009年第5期58-62,共5页
The high and large span cast-in-place reinforced concrete cantilever structure of the office building of some court, which is located I-steel at the cantilever and used steel pipe scaffold as the support, has guarante... The high and large span cast-in-place reinforced concrete cantilever structure of the office building of some court, which is located I-steel at the cantilever and used steel pipe scaffold as the support, has guaranteed the frame body and structure security by the frame body calculating, on-site test and reasonable construction order. 展开更多
关键词 cast-in-place reinforced concrete support of cantilever structure high and long span design and construction
下载PDF
Generalized Frames and Frame Operators
18
作者 姚喜妍 杜鸿科 《Journal of Mathematical Research and Exposition》 CSCD 北大核心 2004年第2期203-208,共6页
In this paper, we introduce and study the generalized frame in a separableHilbert space H. Using operator-theoretic-methods, we give some conditions for a gen-eralized frame to be a tight frame, a dual frame, or an in... In this paper, we introduce and study the generalized frame in a separableHilbert space H. Using operator-theoretic-methods, we give some conditions for a gen-eralized frame to be a tight frame, a dual frame, or an independent frame in H. We alsoprove some results concerning generalized frame operators. 展开更多
关键词 Hilbert space generalized frame frame operator
下载PDF
Some Applications of Orthogonal Projections in Generalized Frames
19
作者 姚喜妍 杜鸿科 《Journal of Mathematical Research and Exposition》 CSCD 北大核心 2006年第2期227-232,共6页
Using operator-theoretic-methods, we give some characterizations for a dual generalized frame of a generalized frame in a separable Hilbert space H. We also prove a result concerning two strongly disjiont generalized ... Using operator-theoretic-methods, we give some characterizations for a dual generalized frame of a generalized frame in a separable Hilbert space H. We also prove a result concerning two strongly disjiont generalized frames. 展开更多
关键词 generalized frame dual generalized frame strongly disjiont orthogonal projection
下载PDF
创业者之歌
20
《时事报告》 1995年第2期1-1,共1页
创业者之歌改革、发展、稳定是我国当今时代的主旋律。诚如人民日报95新年献词所提出的,1994年是改革之年,发展之年,稳定之年。1995年将依然在改革中求发展,在发展中保持稳定,在稳定中加快我们前进的步伐。我们的目标是... 创业者之歌改革、发展、稳定是我国当今时代的主旋律。诚如人民日报95新年献词所提出的,1994年是改革之年,发展之年,稳定之年。1995年将依然在改革中求发展,在发展中保持稳定,在稳定中加快我们前进的步伐。我们的目标是建设有中国特色的社会主义,是新中国... 展开更多
关键词 创业者 创业精神 建设有中国特色的社会主义 理论与实践 强烈的时代感 思想解放 实事求 解放思想 认识和处理 框架架
原文传递
上一页 1 2 下一页 到第
使用帮助 返回顶部