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A novel lead-free relaxor with endotaxial nanostructures for capacitive energy storage

SusMat 2024年第1期4卷 116-125页

作者： Xiaoyan Dong Tengfei Hu xiaojunwu Jie Yin Zhengqian Fu Jiagang Wu College of Materials Science and Engineering Sichuan UniversityChengduP.R.China Analysis and Testing Center for Inorganic Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiP.R.China

Dielectric capacitors with a fast charging/discharging rate,high power density,and long-term stability are essential components in modern electrical ***,miniaturizing and integrating capacitors face a persistent challenge in improving their energy density(W_(rec))to satisfy the specifications of advanced electronic systems and *** this work,leveraging phase-field simulations,we judiciously designed a novel lead-free relaxor ferroelectric material for enhanced energy storage performance,featuring flexible distributed weakly polar endotaxial nanostructures(ENs)embedded within a strongly polar fluctuation *** matrix contributes to substantially enhanced polarization under an external electric field,and the randomly dispersed ENs effectively optimize breakdown phase proportion and provide a strong restoring force,which are advantageous in bolstering breakdown strength and minimizing ***,this relaxor ferroelectric system incorporating ENs achieves an exceptionally high W_(rec)value of 10.3 J/cm^(3),accompanied by a large energy storage efficiency(η)of 85.4%.This work introduces a promising avenue for designing new relaxor materials capable of capacitive energy storage with exceptional performance characteristics.

关键词： endotaxial nanostructure energy storage lead-free relaxor ferroelectric

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Numerical Investigation into the Air Flow Distributions of the Air Conditioning System in the Modular Data Center

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Advances in Applied Mathematics and Mechanics 2019年第1期11卷 91-107页

作者： Hao Dong Ziqiang Qin Shicheng Liu Yao Li Yingying Shen Haibo Wang Yitong Zong xiaojunwu Haiqing Si College of Aerospace Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China College of Civil Aviation and Flight Nanjing University of Aeronautics and AstronauticsNanjing 210016China China Aerodynamics Research and Development Center Mianyang 621000China

Data center plays an increasingly important role in everyday *** data center is becoming more and more powerful,energy consumption is also increasing *** air conditioning system occupies at least 50 percent of the total energy ***,delicate analysis on the air conditioning system could help to reduce energy consumption in data *** advanced Finite Volume Method with RNG k-ε model and convective heat exchange model is used in this paper to study the airflow and the temperature distribution of modular data center under different ***,the calculation formula of convective heat transfer coefficient for plate flow is adopted to simplify analysis;and fans on the back of racks are simplified to be walls with a certain pressure *** reveal that,in the case where air conditioners are arranged face-to-face,the temperature distribution on the back of racks is not uniform,and local high temperature points emerge near the side wall of air *** analyzing the distribution of air flow and temperature,geometric model is optimized by using a diagonal rack arrangement and drilling holes on the side *** the same energy consumption situation,the overall maximum temperature of the optimized model is reduced by 2.3℃ compared with that of the original one,and the maximum temperature on the server surface is reduced by 1℃.Based on the optimized model,the effect of the hot aisle distance on the temperature distribution is *** simulating four different cases with various distances of hot aisle of 100cm,120cm,130cm and 150cm,it is found that the temperature is generally lower and distributed more evenly in the case with 120cm hot aisle *** demonstrates that the distance of hot aisle has an effect on temperature.

关键词： Modular data center air conditioning temperature distribution hot/cold aisle CFD

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基于检疫机理的网络容侵QT模型的研究

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网络安全技术与应用 2005年第5期 44-46,52页

作者：肖俊武杨凡湖北工业大学计算机学院湖北430068

本文提出了一个基于检疫机理的网络容侵QT模型,为构建具有容侵能力的信息网络安全管理体系提供了理论指导,解决了一直困扰信息安全领域中的信息安全与信息服务两者之间矛盾和对立的问题,提供了极高的信息安全度和较高的信息服务质量。

关键词： T模型机理检疫安全管理体系信息安全理论指导信息网络信息服务服务质量安全度

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Determination of IgA,IgG,IgM Class-Specific Rheumatoid Factor and Its Clinical Evaluation

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Journal of Medical Colleges of PLA(China) 1989年第4期4卷 361-364页

作者：李晓军武建国 the Department of Clinical Immunology of General Hospital of Nanjing Command of PLA Nanjing Second Military Medical University Shanghai 200433 and Department of Clinical ImmunologyGeneral Hospital of Nanjing CommandPLANanjing 210002

Solid Phase enzyme-linked Immunosorbent assay（ELISA） for detectingclass-specific rheumatoid factor （RF） was *** rabbit lgG was used ascoating antigen and the presence of RF was demonstrated by F（ab’）2 fragment of anti-humanIg conjugated to horseradish peroxidase（HRP）.The results showed that high levels ofIgM-RF,IgG-RF and IgA-RF were found in patients with rheumatoid arthritis.A positive cor-relation existed between IgM-,IgG-,IgA-RF and disease *** presence of vasculitis al-so correlated positively with the levels of 3 class-specific RFs.

关键词： rheumatoid factor ELISA rheumatoid arthritis

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