摘要：为研究冷弯薄壁型钢-钢板剪力墙结构的抗震性能,对冷弯薄壁型钢边柱内置薄钢板剪力墙进行低周往复加载试验,对比不同边柱截面厚度及截面形式对其抗震性能的影响。试验中得到了冷弯薄壁型钢-钢板剪力墙的破坏形态、荷载-位移滞回曲线、骨架曲线、荷载及位移特征值,并对结构的破坏特征、延性、耗能能力、承载力及刚度退化进行分析。结果表明:冷弯薄壁型钢-钢板剪力墙具有良好的抗震性能;增加边柱截面厚度及选用帽形边柱均可提高剪力墙的承载力、刚度及耗能性能。计算3个试件受剪承载力设计值和弹性抗侧刚度,其值均高于常用冷弯薄壁组合墙体的;结合破坏特征提出冷弯薄壁型钢-钢板剪力墙3个受力阶段;边柱对剪力墙破坏起控制因素,工程设计中应保证边柱承载能力,宜采用"强边柱、弱钢板"的设计理念。

摘要：Deinococcus radiodurans’high resistance to various stressors combined with its ability to utilize sustainable carbon sources makes it an attractive bacterial chassis for synthetic biology and industrial ***,to fully harness the capabilities of this microbe,further strain engineering and tool development are *** for creating seamless genome modifications are an essential part of the microbial genetic toolkit to enable strain ***,we report the development of the SLICER method,which can be used to create seamless gene deletions in *** process involves(a)integration of a seamless deletion cassette replacing a target gene,(b)introduction of the pSLICER plasmid to mediate cassette excision by I-SceI endonuclease cleavage and homologous recombination,and(c)curing of the helper *** demonstrate the utility of SLICER for creating multiple gene deletions in *** by sequentially targeting 5 putative restriction-modification system genes,recycling the same selective and screening markers for each subsequent *** we observed no significant increase in transformation efficiency for most of the knockout strains,we demonstrated SLICER as a promising method to create a fully restriction-minus strain to expand the synthetic biology applications of ***,including its potential as an in vivo DnA assembly platform.

摘要：承受荷载的钢结构在火灾下可发生明显的蠕变变形,钢结构中的焊接残余应力在火灾下也会一定程度地释放,因而高温蠕变变形和残余应力会对钢柱的耐火性能产生影响。为了准确地对高强度Q460钢柱进行抗火设计,有必要定量分析高温蠕变和残余应力释放对钢柱承载力的影响。采用电炉对2根焊接H形Q460钢柱进行耐火试验,得到无保护Q460钢柱在不同荷载水平下轴向位移、跨中侧向位移及温度随时间的变化曲线,并得到破坏时的临界温度。引入高温蠕变和残余应力,采用AnSYS有限元软件建立Q460钢柱耐火分析模型并对其火灾响应进行分析,通过试验数据验证模型的可靠性。利用有限元模型分析了ISO-834标准火灾下Q460钢柱在不同长细比、荷载比、初弯曲和升温速率下临界温度的变化。结果表明,荷载比的增大、初弯曲的增大以及升温速率的降低会降低Q460钢柱的临界温度。根据参数分析结果提出考虑蠕变影响的高强度Q460钢柱临界温度计算方法,可供结构抗火设计参考。

摘要：提出一种软件定义控制系统(software defined control system,SDCS),它是一种基于全连通群的全分布式控制器方案,其特点是控制任务被虚拟化为多个虚拟控制任务(virtual control tasks,VCTs)后分布在无线网络中具有计算和存储功能的节点上。无线网络的拓扑结构本质上是不稳定的,通过构建可迁移节点集,在虚拟控制任务和节点之间建立动态映射关系,以应对潜在的节点故障对控制系统功能和性能的影响。将映射关系调整过程等效为外部方波脉冲扰动,分析了节点故障引起的映射关系的改变对系统稳态和动态性能的影响。所提方案中无线网络充当一个动态的分布式控制器,而非使用某一特定核心节点执行控制任务,上述控制器分布式设计以及动态映射关系提升了控制系统的灵活性和可靠性。最后在MATLAB/Simulink中进行了仿真分析,结果显示了所提方案的可用性及有效性。

摘要：In this feasibility study, we investigate the viability of using Liquefied natural Gas （LnG） fuel in an open type Ro-Ro passenger ferry and the associated potential challenges with regard to the vessel safety systems. We recommend an appropriate methodology for converting existing ships to run on LnG fuel, discuss all the necessary modifications to the ship’s safety systems, and also evaluate the relevant ship evacuation procedures. We outline the basic requirements with which the ship already complies for each safety system and analyze the additional restrictions that must be taken into consideration for the use of LnG fuel. Appropriate actions are recommended. Furthermore, we carry out a hazard identification study. Overall, we clearly demonstrate the technical feasibility of the investigated scenario. Minimal modifications to the ship’s safety systems are required to comply with existing safety rules for this specific type of ship.

摘要：为探讨钢渣掺量对膏体早期强度和流变特性的影响效果,设计不同钢渣掺量的膏体早期强度与流变特性实验,使用XRD、TG/DTG和SEM等手段研究胶凝材料的水化产物,利用Zeta电位和pH计分析料浆屈服应力与黏度变化机理。结果表明,钢渣掺量由30%增至50%时,膏体早期(3 d、7 d、14 d和28 d)强度先增大后减小,钢渣掺量为35%时强度最优,养护28 d的净浆试样质量总损失为23.40%,水化产物更多,结构更致密。随钢渣掺量的增大,试样的屈服应力和黏度一直增大,固体颗粒间引力大和需要外力破坏絮凝结构是料浆屈服应力高的原因,而固体颗粒间的摩擦加剧是造成料浆黏度高的重要原因。

摘要：循证实践正在成为西方心理治疗发展的主流方向。但如何理解循证实践的"证据"仍是见仁见智。部分社会大众甚至心理学专家仅将"循证"当作一种"修辞"或"时尚",顾名思义地界定"证据",或按主观信仰随意地选择与应用"证据"。文章以"证据"为研究焦点,试图建构系统理解"证据"的全面图景,探讨了心理治疗循证实践中关于"证据"的4个基本问题:(1)从历史考察与理论分析的视角出发,探讨了"心理治疗为什么需要证据";(2)从证据的类型范围、生产者及存在形式三个视角,描述了"心理治疗存在哪些证据";(3)从证据的科学程度、研究设计的严谨程度及解决实践问题的契合程度出发,阐述了"哪些证据才是好的证据";(4)从6个步骤推广证据及创新研究设计两个方面展开,分析了"在现实世界中如何推广与应用证据"。

摘要：Corrugated reactors are known for their use in applications requiring UV-exposure, whereby media flowing within the corrugated channel react with a photo-active catalyst impregnated on the surface （i.e. TiO2）. The performance in these systems is dependent on catalyst properties and reactivity for a given light source, in conjunc-tion with the coupled transport of reactants within the media and photons falling incident to the catalyst surface. Experimental and computational analyses of local mass transfer and radiation pattems for a broad range of corrugation angles, depths, and non-idealities introduced during manufacture （i.e. fold curvature） are thus integrated to the design and optimization of these systems. This work explores techniques for determining incident energy distribu-tions on the surface of corrugated reactor geometries with non-ideal cross-sectional profiles, and the local and overall mass transfer rates obtained using computational fluid dynamics and experimental analysis. By examining the reaction kinetics for the photo-degradation of 4-chlorophenol over a TiO2 catalyst, the effects of surface area, energy incidence with photon recapture, and local mass transfer on overall reactor performance are presented to highlight ootimization concerns for these tvoes of reactors.

摘要：对中加护理教学中有关案例教学、健康手册或健康促进方案的设计、参与研究课题培养学生理论与实践相结合能力的方式进行比较,认为国内高等护理教育可根据国情,参考加拿大护理课堂教学中好的经验及不足之处,发展适合具有中国特色的课堂教学方法,为提高学生理论与实践相结合能力提供良好的环境。

摘要：创新和创新区已日益成为城市经济发展和城市竞争力的重要元素,在科技和人才日渐成为激发城市创新型经济,及促进城市活力的主导甚至决定性因素的当今时代,尤为如此。通过对欧洲、北美和亚洲三个不同类型的科技型创新区国际最佳实践的系统梳理,甄别出用以打造一个科技型创新区的共通性要素、标准和原则。国际最佳实践证明,科技型创新区的人本化构建正在成为一种主流趋势,即综合考虑人在各阶段、各层次等多样化需求的基础上,通过对文化要素的有效鉴别和这些要素之间的作用机理,使它们有机融合并系统嵌入到创新区的空间打造中。结论表明:要成功打造一个科技型创新区,必须考虑并重视七大要素,即创意人才、企业集群、能动设施、资金保障、运营管理、空间结构和文化氛围。基于此,提出对中国科技型创新区建设与发展的五大启示,即愿景导向下的持续培育、前瞻性定位、人本化空间布局、创新激发型活动安排和多利益群体参与。最后,还提出要从四个方面进行互动关联研究,以构建空间/地方人本化打造的完整理论体系。