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ods层数据对智慧运维应用指标支撑的判断方法探索

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通信与信息技术 2024年第1期 78-81,86页

作者：李泽华赵斌王平杨磊万生笑黄杰中国广电四川网络股份有限公司四川成都610041

通过对智慧运维大数据ods层中表及数据量、字段数据占比、关键字段规则检查分析手段,为快速判断ods层数据对智慧运维应用指标的支撑进行了探索。首先分析ods层的数据表,确定哪些表有数据,有数据表的数据量,然后分析有数据表的每个字段... 详细信息

通过对智慧运维大数据ods层中表及数据量、字段数据占比、关键字段规则检查分析手段,为快速判断ods层数据对智慧运维应用指标的支撑进行了探索。首先分析ods层的数据表,确定哪些表有数据,有数据表的数据量,然后分析有数据表的每个字段的数据占比,最后通过关键字段的规则设定,分析符合规则字段的数据量、数据占比和不符合规则字段的数据量,利用以上分析结果达到智慧运维应用指标支撑的快速判断和优化提升ods层数据质量的目的。

关键词：智慧运维应用 ods 关键字段 O域数据占比

Effects of aluminum and titanium on the microstructure of ods steels fabricated by hot pressing

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International Journal of Minerals,Metallurgy and Materials 2018年第10期25卷 1156-1165页

作者： Qian Zhao Li-ming Yu Yong-chang Liu Yuan Huang Zong-qing Ma Hui-jun Li State Key Lab of Hydraulic Engineering Simulation and Safety School of Materials Science & Engineering Tianjin University

Three oxide-dispersion-strengthened(ods)steels with compositions of Fe-14Cr-2W-0.2V-0.07Ta-0.3Y_2O_3(wt%,so as the follows)(14Y),Fe-14Cr-2W-0.2V-0.07Ta-1Al-0.3Y_2O_3(14YAl),and Fe-14Cr-2W-0.2V-0.07Ta-0.3Ti-0.3 Y_2O_3(14YTi)were fabricated by hot pressing.Transmission electron microscopy(TEM)was used to characterize the microstructures and nanoparticles of these ods steels.According to the TEM results,14Y,14YAl,and 14YTi ods steels present similar bimodal structures containing both large and small grains.The addition of Al or Ti has no obvious effect on the microstructure of the steels.The spatial and size distribution of the nanoparticles was also analyzed.The results indicate that the average size of nanoparticles in the 14YTi ods steel is smaller than that in the 14YAl ods steel.Nanoparticles such as Y_2O_3,Y_3Al_5O_(12) and YAlO_3,and Y_2Ti_2O_7 were identified in the 14Y,14YAl,and 14YTiods steels,respectively.

关键词： hot pressing ods steel mechanical alloying bimodal structure nanoparticle aluminum titanium

The synthetic strategies of hierarchical TS-1 zeolites for the oxidative desulfurization reactions

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Chinese Journal of Chemical Engineering 2020年第9期28卷 2227-2234页

作者： Guoju Yang Ji Han Yue Liu Ziyi Qiu Xiaoxin Chen State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China International Center of Future Science Jilm UniversityChangchun 130012China Department of Chemistry and Catalysis Research Center Technische Universitat MunchenLichtenbergstrasse 485747 GarchingGermany

With the increasingly stringent standards for limiting sulfide content in liquid fuels,oxidative desulfurization(ods)has become a promising ultra-deep desulfurization process in fuel desulfurization.TS-1 zeolites show great potential as catalysts for ods reactions,due to its remarkable oxidation activity at low temperatures and pressure.However,the inherent microporous structure of conventional TS-1 zeolites restricts the mass transportation and renders the active sites in the microporous space of TS-1 zeolites inaccessible for bulky aromatic organosulfur compounds.Fabrication of hierarchical TS-1 zeolites by incorporating meso-/macropores into microporous TS-1 zeolites is an effective strategy to improve mass transportability.In recent years,abundant efforts have been dedicated to developing synthetic strategies of hierarchical TS-1 zeolite,thereby improving its catalytic performance in the ods process.This mini-review addresses the synthetic methods of hierarchical TS-1 catalysts and their catalytic performance in the ods reactions.In addition,some current problems and prospects of synthesis routes for constructing hierarchical TS-1 catalysts have also been revised.We expect this mini-review to shed light on the more efficient preparation strategies of hierarchical TS-1 zeolites for the ods process.

关键词： Zeolites TS-1 Synthesis Hierarchical ods

Discrete dislocation plasticity analysis of dispersion strengthening in oxide dispersion strengthened(ods) steels

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Journal of Central South University 2014年第4期21卷 1249-1255页

作者： Akiyuki Takahashi Shota Sato Department of Mechanical Engineering Faculty of Science and TechnologyTokyo University of Science

A discrete dislocation plasticity analysis of dispersion strengthening in oxide dispersion strengthened(ods) steels was described. Parametric dislocation dynamics(PDD) simulation of the interaction between an edge dislocation and randomly distributed spherical dispersoids(Y2O3) in bcc iron was performed for measuring the influence of the dispersoid distribution on the critical resolved shear stress(CRSS). The dispersoid distribution was made using a method mimicking the Ostwald growth mechanism. Then, an edge dislocation was introduced, and was moved under a constant shear stress condition. The CRSS was extracted from the result of dislocation velocity under constant shear stress using the mobility(linear) relationship between the shear stress and the dislocation velocity. The results suggest that the dispersoid distribution gives a significant influence to the CRSS, and the influence of dislocation dipole, which forms just before finishing up the Orowan looping mechanism, is substantial in determining the CRSS, especially for the interaction with small dispersoids. Therefore, the well-known Orowan equation for determining the CRSS cannot give an accurate estimation, because the influence of the dislocation dipole in the process of the Orowan looping mechanism is not accounted for in the equation.

关键词：弥散强化刃型位错塑性分析 ods 氧化物离散剪切应力钢

基于高频动态响应的点阵夹芯结构损伤识别研究

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应用力学学报 2023年第4期40卷 873-882页

作者：赵倩冯侃江苏大学土木工程与力学学院镇江212013

针对点阵夹芯结构的脱焊损伤,提出了一种基于高频激励下结构ods(operational deflection shapes)的损伤检测方法。ods包含结构的整体动态响应特性,尤其是高频激励下损伤区域的局部振动信息。首先通过仿真计算出损伤局部区域的特征频率,... 详细信息

针对点阵夹芯结构的脱焊损伤,提出了一种基于高频激励下结构ods(operational deflection shapes)的损伤检测方法。ods包含结构的整体动态响应特性,尤其是高频激励下损伤区域的局部振动信息。首先通过仿真计算出损伤局部区域的特征频率,选取合适的高频宽频带激励损伤结构。然后,采用压电片与扫描式激光测振仪结合,检测高频稳态信号激励下损伤结构的动态响应,综合考虑频段内多个频率下的ods,由损伤成像中共振峰的位置,直接定位损伤。仿真与试验均验证了该方法识别损伤的有效性。

关键词：点阵夹芯结构 ods 损伤识别局部共振高频动态响应

Hardening of an ods Ferritic Steel after Helium Implantation and Thermal Annealing

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Chinese Physics Letters 2018年第5期35卷 82-86页

作者：苏长浩张崇宏杨义涛丁兆楠陈宇光 Akihiko Kimura Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 University of Chinese Academy of Sciences Beijing 100049 Institute of Advanced Energy Kyoto University Kyoto 611-0011 Japan

Specimens of an oxide dispersion strengthened（ods） ferritic steel（15 Cr-4 Al-0.6 Zr-0.1 Ti） are implanted with multiple-energy He ions at room temperature to create a damage plateau of 0.4 dpa for the average（corresponding to an He concentration of about 7000 appm） from the near surface to a depth about 1 um. The specimen is subsequently thermally annealed at 800°C for 1 h in a vacuum so that simple defects can be formed in the as-implanted state that has undergone significant recombination, meanwhile helium bubbles at nano-scale are formed. Hardness of the specimens are tested with the nano-indentation technique. A hardening by 25% is observed. Microstructures of the specimen after irradiation/annealing are investigated with transmission electron microscopy. Helium bubbles are generally located at dislocations and grain boundaries. Using the dispersed barrier strength model, the strength factor of helium bubbles in the ods ferritic steel is estimated to be between0.1 and 0.26, which is close to that of helium bubbles in austenitic steels.

关键词： Cr ods Hardening of an ods Ferritic Steel after Helium Implantation and Thermal Annealing

Tailoring the secondary phases and mechanical properties of ods steel by heat treatment

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Journal of Materials Science & Technology 2019年第6期35卷 1064-1073页

作者： Qian Zhao Zongqing Ma Liming Yu Huijun Li Chenxi Liu Chong Li Yongchang Liu State Key Lab of Hydraulic Engineering Simulation and Safety School of Materials Science & EngineeringTianjin University

The oxide dispersion strengthened(ods) steel with the nominal composition of Fe–14 Cr–2 W–0.3 Ti–0.2 V–0.07 Ta–0.3 Y2O3(wt%) was fabricated by mechanical alloying and hot isostatic pressing(HIP). In order to optimize the relative volume fraction of secondary phases, the as-HIPed ods steel was annealed at 800°C, 1000°C, 1200°C for 5 h, respectively. The microstructures and different secondary phases of the as-HIPed and annealed ods samples were identified by scanning electron microscopy(SEM), transmission electron microscopy(TEM), and X-ray diffraction(XRD). The tensile properties of all the ods steels at room temperature were also investigated. The results indicate that annealing is an effective way to control the microstructure and the integral secondary phases. The annealing process promotes the dissolution of M23C6 particles, thus promoting the precipitation of TiC.No obvious coarsening of Y2Ti2O7 nanoparticles can be observed during annealing. The tensile results indicate that the annealed ods sample with the optimized secondary phases and high density possesses the best mechanical properties.

关键词： ods steel Annealing Secondary phase Mechanical property

Preparation of Mo_2C nanoparticles dispersion-strengthened copper-based composite by EB-PVD

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Rare Metals 2014年第5期33卷 568-572页

作者： Xiao Li Guang-Ping Song Fan-Yu Bu Bin Xu Bai-Yang Lou Zhan Lin College of Materials Science and Engineering Zhejiang University of Technology Center for Composite Materials and Structures Harbin Institute of Technology

In this research, a nano-Mo2 C particle dispersion-strengthened copper alloy was prepared by a novel method, i.e., electron beam physical vapor deposition（EBPVD） which has advantages of simple technical process and low cost compared with the conventional mechanical alloying method. And the microstructure and properties of the material were investigated. The results show that the copper matrix is composed of columnar crystals with the average width of 7 lm, and the size of Mo2 C dispersoid is1–7 nm. The ultimate tensile strength of the material is486 MPa, and the electrical conductivity is 82 % IACS. As the temperature increases from 293 to 573 K, the material becomes more brittle.

关键词： Electron beam physical vapor deposition Dispersion-strengthened copper ods In-situ

High-frequency electropulse deposition of microcrystallized MGH754 ods alloy coatings

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Science China Chemistry 2000年第5期43卷 540-546页

作者：庞洪梅齐慧滨何业东王德仁李正伟 Corrosion Erosion and Surface Technology Laboratory Corrosion and Protection Center Beijing University of Science and Technology Beijing 100083 China

A simple but more efficient technique——high-frequency electropulse deposition——wasdeveloped to produce microcrystallized MGH754 ods alloy coatings on the 1Cr18Ni9Ti stainless steel substrate. The coating has a very fine grain size of 30—300 nm and metallurgical bonding with the substrate. Isothermal oxidation in air at 1 000℃ for 100 h shows that micro-crystallisation and dispersed oxide particles promote the selective oxidation of Cr greatly to form a protective and continuous Cr2O3 scale and also improve the scale spallation resistance dramatically, thus increasing the oxidation resistance of 1Cr18Ni9Ti.

关键词： high-frequency electro-spark deposition microcrystaliine ods alloy coatings oxidation.