新型外套管式节点试验研究及简化设计

为研究外套管式节点的抗震性能,进行3个十字形足尺构件的低周反复试验,并对主要试验数据进行分析总结;采用ANASYS有限元与试验结果进行对比分析。结果表明：分析模型与试验结果吻合较好。通过有限元模型分析结果和屈服线理论,确定加劲肋厚度和外套管厚度的设计方法。     

Improving the transfer of near infrared prediction models by orthogonal methods

Eight calibration transfer methods based on the removal of orthogonal signal were compared for the standardization of whole soybean protein and oil models. Dynamic orthogonal projection (DOP), transfer by orthogonal projection (TOP), error removal by orthogonal subtraction (EROS), orthogonal signal correction (OSC), and orthogonal projections to latent structures (O-PLS) as well as the modification and extension of some of these methods were compared in the transfer of models in intra and inter-brand situations using two Foss Infratecs and two Bruins OmegAnalyzerGs. For each brand, a master was designated and its models transferred onto the second unit of its network and the two units of the second brand. Calibration models were transferable from brand to brand with similar or better precision than when each instrument was calibrated on its own calibration set (for Infratec 1229, the relative predictive determinant (RPD) increased in intra and inter-brand calibration transfer situations from 10.42 to 11.45 and 10.57, with DOP and EROS respectively). Performance of each method was different across parameters, instruments, and validation sets. DOP modifications on the determination of the difference matrix showed promising results while TOP and EROS extensions to include variability specifically present in certain crop years did not bring any beneficial effects.     

催化转换器在线诊断功能标定

针对国家标准GB 18352.3-2005的要求,在传统的利用三元催化转换器储氧能力进行OBD诊断方法的基础上,开发出一种新的三元催化转换器OBD诊断数值算法。使用此数值算法对捷达1.6轿车进行车载诊断OBD系统标定。试验结果表明,三元催化转换器的诊断结果完全满足国家标准要求,对排放结果没有影响。     

浅谈铁路DWDM网络的应用与运维

自20世纪90年代DWDM系统商用以来,已迅速成为长途传输的主流方式.2000年以来,铁路以8横8纵为基础,相继建成了五大DWDM基础光传输网络环.如今伴随DWDM技术的广泛普及,传输网的维护与传统方式相比也有了较大区别.通过分析DWDM优势,以及铁路应用现状,结合相关文献和工作经验与大家讨论一下几种DWDM故障判断与定位的常用方法.     

用光监控通道实现WDM网络的管理

比较了WDM网络特征信息的几种传输方法,给出了适合在监控信道中传输的开销内容。在此基础上,以城域WDM网络为例,给出了OSC中各种开销的处理过程和城域WDM网中OSC子系统的实现实例。为了适应智能光网络管理的需要,未来的光监控通道需要大约100Mbps的带宽。     

Effects of loading transition metal(Mn,Cr,Fe,Cu) oxides on oxygen storage/release properties of CeO_2-ZrO_2 solid solution

Cerium zirconium-based(CZ) oxygen storage materials(OSMs) play a crucial role in three-way catalysts(TWCs),while CZ needs to be modified to satisfy more rigorous emission standard.In this study,transition metal(TMs=Mn,Cr,Fe,Cu) oxides modified CZ were prepared by incipient wetness impregnation method to improve the oxygen storage capacity of CZ-based materials.To clearly illustrate the influence of TM oxides,N_2 adsorption-desorption,X-ray diffraction(XRD),oxygen storage capacity(OSC),temperature programmed reduction by H_2(H_2-TPR) and X-ray photoelectron spectroscopy(XPS) were used to characterize the physical and chemical properties of samples.It is found that,all modified CZ have higher OSC,lower reduction temperatures than those of pristine CZ.Interaction between TMOs and CZ take precedence over specific surface to influence OSC.Notably,FeO_x/CZ has the highest OSC,which is about 1.9 times that of CZ and it could be attributed to synergistic effect between FeO_x and CZ;CuO_x/CZ has the lowest reduction temperature which is 168℃lower than that of CZ,and it can be explained by hydrogen spillover effect.     

制备方法对Ce_(0.67)Zr_(0.33)O_2固溶体性能的影响

用氧化共沉淀法、均匀共沉淀法和柠檬酸溶胶-凝胶法制备了Ce_(0.67)Zr_(0.33)O_2固溶体,并将经和900℃焙烧后的固溶体进行了XRD、BET、Raman、H_2-TPR和储氧量(OSC)表征。结果表明,氧化共沉淀法和柠檬酸溶胶-凝胶法制备的Ce_(0.67)Zr_(0.33)O_2固溶体的储氧量、比表面积均高于均匀共沉淀法,且制备的固溶体经900℃焙烧4 h后未出现相分离,具有良好的热稳定性。     

Effect of Manganese Doping on Oxygen Storage Capacity of Ceria-Zirconia Mixed Oxides

CeO2-ZrO2-MnOx mixed oxide series were prepared by sol-gel method. CO pulse and CO-O2 cycle measurements were carried out to examine the oxygen storage complete capacity （OSCC） and dynamic oxygen storage capacity （OSC） of the samples. The doping method brought about strong interactions between manganese oxide and ceria, both in the bulk and on the surface. Only a small part of Mn cations are incorporated into the ceria lattice to form solid solutions and the remaining are left on the surface as finely dispersed Mn3O4. The OSC behaviors of the materials are influenced by the doping amount of Mn and the solubility of Mn in the CeO2 lattice. The OSC is more easily affected by available contents of oxygen storage components when the measurement frequency is low. Comparatively, the concentration of lattice defects, which affects the mobility of bulk oxygen, is the determining factor under high frequency.     

动态DWDM系统中的OSC子系统研究与实现

基于STM-1和MPLS流量工程的OSC是未来DWDM系统向网状网发展的必然选择.论述了OSC在DWDM系统中的位置,定义基于E1的光监控帧格式,并描述了具体实现电路.     

基于切片分组网（SPN）的彩光技术及组网方案

随着5G的规模部署,对传输网络提出更大带宽、更低时延的要求。作为面向5G的综合业务承载平台,切片分组网（SPN）统一承载无线业务、家庭宽带业务和政企专线业务等,业务量的激增迫使SPN汇聚层和核心层急需大带宽长距传输技术。对SPN彩光技术及组网方案进行研究,包括业务需求、技术方案、组网方案、产业及标准进展等,并进行实验室和现网测试,验证SPN彩光组网功能和性能。