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CO catalytic oxidation over Pd/CeO2 with different chemical states of Pd

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Rare Metals 2020年第7期39卷 800-805页

作者： guo-Feng Zhou Jian Ma shan Bai Li Wang Yun guo School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Research Institute of Industrial Catalysis East China University of Science and TechnologyShanghai 200237China Equipment R&D Center China Nuclear Power Technology Research InstituteShenzhen 518000China

Three Pd/CeO2 catalysts were,respectively,prepared by reduction-deposition and impregnation method(IMP)to investigate the effect of chemical state of Pd on CO *** kinds of surface Pd species,namely PdO and Pdδ+(2<δ≤4)in PdxCe1-xO2,were identified in all Pd/CeO2 samples although their relative ratios in each sample were *** PdxCe1-xO2 species were found to be very active for CO oxidation,and it could act as a channel by which active oxygen species can be transferred from CeO2 to Pd species for CO *** results reveal that the preparation method can severely influence the chemical state of Pd which can further determine the activity for CO oxidation.

关键词： Supported Pd catalyst CeO2 Chemical state of Pd CO oxidation

原发性免疫性血小板减少症患者血清微小RNA-155和微小RNA-146a表达情况及临床意义

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广西医学 2021年第4期43卷 451-454页

作者：孙桂芝贺韦东姬艳博刘丽丽竺青郭成山山东省血液中心机采成分科济南市250014 山东第一医科大学第一附属医院血液内科济南市250014 广东省深圳宝安区人民医院风湿免疫科深圳市518101

目的探讨原发性免疫性血小板减少症(pITP)患者血清微小RNA(miRNA)-155、miRNA-146a的表达情况及临床意义。方法选取130例pITP患者(观察组)及130例血小板捐献者(对照组)作为研究对象。采用实时荧光定量PCR检测所有研究对象血清miRNA-155... 详细信息

目的探讨原发性免疫性血小板减少症(pITP)患者血清微小RNA(miRNA)-155、miRNA-146a的表达情况及临床意义。方法选取130例pITP患者(观察组)及130例血小板捐献者(对照组)作为研究对象。采用实时荧光定量PCR检测所有研究对象血清miRNA-155、miRNA-146a表达水平。比较两组研究对象血小板相关参数、miRNA-155和miRNA-146a表达水平,并分析pITP患者血清miRNA-155、miRNA-146a表达水平与血小板计数、血小板分布宽度(PDW)及血小板平均体积(MPV)的相关性。采用Logistic回归分析影响pITP发生的因素。结果观察组血小板计数、血清miRNA-146a表达水平低于对照组,PDW、MPV及血清miRNA-155表达水平高于对照组(均P<0.05)。pITP患者血清miRNA-155表达水平与血小板计数呈负相关,与PDW、MPV均呈正相关(均P<0.05);血清miRNA-146a表达水平与血小板计数呈正相关,与PDW、MPV均呈负相关(均P<0.05)。血清miRNA-155高表达、血清miRNA-146a低表达均是影响pITP发生的独立危险因素(均P<0.05)。结论pITP患者血清miRNA-155表达水平升高,血清miRNA-146a表达水平下降,两者或在pITP的发生中发挥重要作用。

关键词：原发性免疫性血小板减少症微小RNA-155 微小RNA-146a 表达水平

单采献血者IL-28b基因多态性与隐匿性HBV感染相关性研究

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现代检验医学杂志 2021年第5期36卷 8-11,37页

作者：周娟竺青孙桂芝张红卫郭成山贺韦东陈敏山东省血液中心机采科济南250014 深圳市宝安区人民医院广东深圳518101

目的研究单采献血者白细胞介素-28b(IL-28b)基因多态性与隐匿性乙型肝炎病毒(HBV)感染(OBI)相关性。方法选择2016年1月~2019年12月山东省血液中心成功捐献血小板HbsAg(-)、核酸检测(NAT)无反应的献血者1158例为研究对象,提取献血者血液D... 详细信息

目的研究单采献血者白细胞介素-28b(IL-28b)基因多态性与隐匿性乙型肝炎病毒(HBV)感染(OBI)相关性。方法选择2016年1月~2019年12月山东省血液中心成功捐献血小板HbsAg(-)、核酸检测(NAT)无反应的献血者1158例为研究对象,提取献血者血液DNA,采用直接测序法进行IL-28b基因分型,cobas HBV定量核酸检测试剂盒检测血液HBV-DNA载量,Logistic回归分析IL-28b基因rs8099917位点、rs12979860位点多态性与OBI的关系。结果与非OBI比较,OBI献血者IL-28b基因rs8099917位点G等位基因频率、TG+GG基因型频率显著降低,T等位基因频率、TT基因型频率显著增加(χ^(2)=22.137,22.163,均P<0.01);rs12979860位点T等位基因频率、CT+TT基因型频率显著降低,C等位基因频率、CC基因型频率显著增加(χ^(2)=16.378,19.091,均P<0.01)。OBI献血者rs8099917位点,与TT基因型比较,TG+GG基因型患者HBV-DNA载量显著降低(t=5.257,P<0.01);rs12979860位点,与CC基因型比较,CT+TT基因患者HBV-DNA载量显著降低(t=17.398,P<0.01),以上比较差异均有统计学意义。Logistic回归分析结果显示,rs8099917位点,与TT基因型比较,TG+GG基因型可显著降低OBI发生风险(95%CI:0.288~0.843,P<0.05);rs12979860位点,与CC基因型比较,CT+TT基因型可显著降低OBI发生风险(95%CI:0.207~0.761,P<0.05)。结论单采献血者OBI可能与IL-28b基因rs8099917位点、rs12979860位点多态性有关。

关键词：单采献血者隐匿性乙型肝炎病毒感染白细胞介素-28b 基因多态性

Study on the Distribution of Frictional Forces on Z-yarn Continuous Implanted Preforms and Their Applications

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Chinese Journal of Mechanical Engineering 2022年第4期35卷 53-66页

作者： Zitong guo Zhongde shan Jihua Huang Debo Xue School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Nanjing University of Aeronautics and Astronautics Nanjing 210016China State Key Laboratory of Advanced Forming Technology and Equipment China Academy of Machinery Science and Technology Group Co.ltdBeijing 100083China School of Mechanical Engineering Shandong University of TechnologyZibo 255000China

To improve the quality and efciency of Z-directional 3D preform forming,the Z-yarn frictional force distribution model of the preform and its wear mechanism were *** this study,a tensile force measuring device was designed to measure the force required to replace the guide sleeve,which is equivalent to the Z-yarn frictional *** frictional force is proportional to the number of preform layers and is applied to the preform decreased from the corner,edge,sub-edge,and middle in order.A back propagation neural network model was established to predict the friction at diferent positions of the preform with diferent layers,and the error was within 1.9%.The wear of Z-yarn was studied at diferent frictional positions and after diferent times of successive implantation into the *** results showed that with an increase in the number of Z-yarn implantations and frictional forces,the amount of carbon fber bundle hairiness gradually increased,and the tensile fracture strength damage of the fber was increasingly afected by the frictional *** the corner position of the preform,when the number of implantations was 25,the fber fracture strength decreased non-linearly and substantially;in order to avoid fber fracturing in the implantation process,the Z-yarn needs to be replaced in time after 20–25 cycles of continuous *** study solves the problem of difculty in measuring the force required for individual replacements owing to the excessive number of guide sleeves,puts forward the relationship between fber wear,preform position,and implantation times,solves the phenomenon of fracture in the preform during Z-direction fber implantation,and realizes the continuous implantation of fbers.

关键词： Z-yarn implantation BP neural network Z-yarn wear

Rational design of diamond through microstructure engineering:From synthesis to applications

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Carbon Energy 2024年第7期6卷 94-122页

作者： Yalun Ku Wentao Huang Xing Li Li Wan Kuikui Zhang Longbin Yan Ying guo Shaobo cheng Chongxin shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Material PhysicsMinistry of EducationSchool of Physics and Laboratory of Zhongyuan LightZhengzhou UniversityZhengzhouChina Institute of Quantum Materials and Physics Henan Academy of SciencesZhengzhouChina

Diamond possesses excellent thermal conductivity and tunable ***,the high-pressure,high-temperature,and chemical vapor deposition methods are the most promising strategies for the commercial-scale production of synthetic *** diamond has been extensively employed in jewelry and cutting/grinding tasks,the realization of its high-end applications through microstructure engineering has long been ***,we discuss the microstructures encountered in diamond and further concentrate on cutting-edge investigations utilizing electron microscopy techniques to illuminate the transition mechanism between graphite and diamond during the synthesis and device *** impacts of distinct microstructures on the electrical applications of diamond,especially the photoelectrical,electrical,and thermal properties,are *** recently reported elastic and plastic deformations revealed through in situ microscopy techniques are also ***,the limitations,perspectives,and corresponding solutions are proposed.

关键词： diamond in situ microscopy microstructures phase transition structure-property relationship

Multi-party blind quantum computation protocol with mutual authentication in network

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Science China(Information Sciences) 2021年第6期64卷 158-171页

作者： Rui-Ting shan Xiubo CHEN Kai-guo YUAN Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and Telecommunications

Blind quantum computation(BQC) can ensure a client with limited quantum capability safely delegates computing tasks to a remote quantum server. In order to resist attacks from ignoring identity authentication in BQC protocols, it is necessary to guarantee the legality of both clients and servers in a multi-party BQC network. So we propose a multi-party BQC protocol involving three phases to distribute shared keys and authenticate identities. Firstly, by using the advantages of measurement device independent quantum key distribution(MDI-QKD), the registered client and the assigned server could share the initial key safely in registration phase. Secondly, with the help of semi-honest certificate authority(CA), mutual identity authentication phase realizes the two-way authentication from both sides through the shared key simultaneously. Thirdly, in the blind quantum computing phase, a registered client can complete his computing task by just measuring the qubits from the assigned server rather than preparing the qubits. Moreover,combined with first-in-first-out(FIFO) principle, clients' authentication and blind quantum computing can be processed in parallel. The protocol can also be applied in other multi-party BQC protocols with the universality of resource states. Compared with other BQC protocols, the reliability of the protocol with identity authentication is guaranteed, and the efficiency will be significantly reflected in real experiments.

关键词： blind quantum computation mutual identity authentication load balancer semi-trust CA quantum network

Effect of Cu Addition in Pipeline Steels on Microstructure,Mechanical Properties and Microbiologically Influenced Corrosion

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Acta Metallurgica Sinica(English Letters) 2017年第7期30卷 601-613页

作者： Xian-Bo Shi Wei Yan Mao-cheng Yan Wei Wang Zhen-guo Yang Yi-Yin shan Ke Yang Institute of Metal Research Chinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China

In the present study, Cu-modified pipeline steels were fabricated to mitigate MIC by the antimicrobial ability of Cu element. The microstructure, mechanical properties and the antimircobial performance of the Cu-modified steel were systematically investigated. The Cu-modified steels showed good antimicrobial performance with remarkable strength enhancement by nanoscale Cu-rich precipitates and good impact toughness without changing the original base microstructures after the optimal aging treatment of 500 °C/1 h.

关键词： Pipeline steel Cu addition Mechanical properties Microstructure Antimicrobial performance

Effect of Carbon Content on Mechanical Properties and Weather Resistance of High Performance Bridge Steels

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Journal of Iron and Steel Research International 2009年第6期16卷 63-69页

作者： guo Jia shanG cheng-jia YANG shan-wu WANG Ying WANG Lian-wei HE Xin-lai Material Science and Engineering School University of Science and Technology Beijing Beijing 100083 China Metallurgical and Ecological Engineering School University of Science and Technology Beijing Beijing 100083 China

The influence of carbon content on the mechanical properties of high yield strength bridge steel has been in- vestigated. The results show that the excellent mechanical properties and corrosion resistance are obtained for the steel with carbon content of 0.03% -0. 05% （mass percent）. According to the results, a new weathering bridge steel plate with carbon content of 0. 045% （mass percent） has been developed. The appropriate controlled cooling process should be taken due to the results of CCT （continuous cooling transformation） and TTT （time-temperature-transformation） to ensure both microstructure and mechanical properties. CCT curve of the newly developed steel shows that when accelerated cooling speed is higher than 5 ℃/s, the intermediate transformation products can be formed. The TTT curve displays that the intermediate transformation temperature ranges from 600 to 530 ℃. Yield strength of the newly developed steels reaches 500 MPa, and their elongation and toughness are excellent.

关键词： low-carbon bridge steel weathering steel intermediate transformation

Dietary resveratrol improves antioxidant status of sows and piglets and regulates antioxidant gene expression in placenta by Keap1-Nrf2 pathway and Sirt1

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Journal of Animal Science and Biotechnology 2018年第3期9卷 639-651页

作者： Qingwei Meng Tao guo Gaoqiang Li Shishuai Sun Shiqi He Baojing cheng Baoming Shi Anshan shan Institute of Animal Nutrition Northeast Agricultural University Harbin

Background: Resveratrol, a plant phenol, affords protection against inflammation and oxidative stress. The objective of this study was to investigate the effects of dietary resveratrol supplementation during pregnancy and lactation on the antioxidant status of sows and piglets and on antioxidant gene expression and pathway in ***: Forty sows were allotted to 2 dietary treatments 20 d after breeding. Sows were fed a control diet and a control diet with 300 mg/kg resveratrol. Oxidative stress biomarkers and antioxidant enzymes were measured in the placenta, milk, and plasma of sows and piglets. Antioxidant gene expression and protein expression of Kelch-like ECH-associated protein 1-Nuclear factor E2-related factor 2(Keap1-Nrf2), nuclear factor kappa B-p65(NFκB-p65) and sirtuin1(Sirt1) were quantified in the ***: Dietary resveratrol increased the litter and piglets weaning weights. Antioxidant status in the milk, placenta and plasma of sows and piglets was partially improved by dietary resveratrol. In placenta, Nrf2 protein expression was increased and Keap1 protein expression was decreased by dietary resveratrol. The m RNA expression of antioxidant genes including catalase(CAT), glutathione peroxidase 1(GPX1), GPX4, superoxide dismutase 1(SOD1)and heme oxygenase 1(HO1), and phase 2 detoxification genes, including glutamate-cysteine ligase modifier(GCLM), microsomal glutathione S-transferase 1(MGST1) and UDP glucuronosyltransferase family 1 member A1(UGT1 A1), was increased by dietary resveratrol. Dietary resveratrol also increased Sirt1 and phosphorylated NFκB-p65 protein expression in the placenta. We failed to observe any influences of dietary resveratrol on pro-inflammatory cytokine levels, including those of interleukin 1β(IL-1β), IL-6, IL-8 and tumor necrosis factor α(TNF-α). However, we observed that the m RNA expression of IL-8 in placenta was reduced by maternal resveratrol. In addition, dietary resveratrol showed interactive effects

关键词： Nrf2 Oxidative stress Piglet Placenta Resveratrol Sirt1 Sow