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Influence of Exposure at 750℃ on Room Temperature Tensile Ductility of Cast TiAl Alloy with the Directional Lamellar Microstructure

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Influence of Exposure at 750℃ on Room Temperature Tensile D...

中国材料大会2012

作者： Chunlei zhu Xiwen Zhang ji Zhang Beijing Key Laboratory of Advanced High Temperature Materials Central Iron & Steel Research Institute

ISBN: (纸本)9783037856086

in this study, based on cast Ti-47.5Al-2.5V-1.0Cr (at. %) alloy with the directional lamellar microstructure, the influence of exposure at 750℃ in air on room temperature tensile ductility was investigated as a function of time, ranging from1hr to 300hr, in order to determine the onset exposure time for a significant reduction in RT ductility and the fracture mechanism for the exposed specimens. The results indicated that this alloy could still retain more than 2.0% of its ductility after exposure at 750℃ for 150hr, and its ductility decreased to 1.58% and .0% even after exposure for 200hr and 300hr, respectively. High ductility for the directional lamellar microstructure could be retained after exposure for 150hr, which was attributed to its high crack origination and propagation resistance at specific lamellar orientation. And the fracture mechanism of the exposed specimen with this special structure would also be discussed.

关键词： Titanium aluminide Thermal exposure Ductility Directional lamellar microstructure Fracture mechanism

The Assessment of Financial Leasing Risk in Grid Corporation

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The Assessment of Financial Leasing Risk in Grid Corporation

2015 International Conference on Management Science,Education Technology,Arts,Social Science and Economics(MSETASSE 2015)

作者： zhu Guorong Feng Hao qin Honghao zhu Guodong Niu Dongxiao Electric Power Research Institute Zhejiang Electric Power Grid Corporation School of Economics and Management North China Electric Power University

There are certain risks while financial leasing address the needs of funds in power grid construction. It is possible to provide some references to the management of grid corporate financial leasing risks by assessing the risk of financial leasing. This paper analyzes the risk of financial leasing existing in grid companies, and constructs the index system of assessment of risks, and establishes the model of assessment of financial leasing risks in grid corporate by fuzzy comprehensive evaluation method. Finally, this paper verifies the validity of the model through an example, and proposes some strategies to decreasing financial leasing risks in grid corporate.

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某超深井油管接头断裂失效原因分析

石油工业技术监督 2024年第6期40卷 6-12页

作者：朱稿林胡瑞龙陈育丽马瑞锋许莞琪刘西西姬丙寅史交齐中石化西北油田分公司物资供应管理中心新疆轮台841600 中国石油长庆油田分公司物资供应处陕西榆林718500 西安三维应力工程技术有限公司陕西西安710075

随着石油工业勘探开发的不断深入,油气井开发工况趋于复杂,管柱失效问题日益凸显,已成为困扰石油工业后期可持续发展的一大难题。通过对油管接头断口处形貌、理化性能、显微组织和腐蚀产物进行分析,确定油管失效模式为塑性断裂特征,主... 详细信息

随着石油工业勘探开发的不断深入,油气井开发工况趋于复杂,管柱失效问题日益凸显,已成为困扰石油工业后期可持续发展的一大难题。通过对油管接头断口处形貌、理化性能、显微组织和腐蚀产物进行分析,确定油管失效模式为塑性断裂特征,主要原因是过载引起的屈服断裂失效;其次,CO_(2)与H_(2)S的耦合腐蚀反应与管体自身的材料缺陷也是油管发生断裂失效的重要原因,为油管接头断裂失效的进一步研究提供了理论依据及技术支撑。

关键词：管柱失效油管接头屈服断裂腐蚀

Prevalence of Tic Disorders for children in China:A Systematic Review and Meta Analysis

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Prevalence of Tic Disorders for children in China:A Systemat...

2016全国药物流行病学学术年会

作者： Yang Chunsong Zhang Lingli zhu Ping zhu Cairong Guo qin Department of Pharmacy Evidence-based Pharmacy CenterWest China Second HospitalKey Laboratory of Birth Defects and Related Diseases of Women and ChildrenSichuan University West China School of Public Health Sichuan University Department of Pediatrics West China second hospitalKey Laboratory of Birth Defects and Related Diseases of Women and ChildrenSichuan University

Objective:To depict the prevalence of Tic disorders（TD） for children in China and explore the influence of sex,age,geographic distribution and diagnostic criteria on the prevalence ***:We searched Pub Med,EMBASE,four Chinese electronic databases and relevant reference *** reviewers independently selected trials,assessed trial quality,and extracted the ***:We included 13 studies investigating 269 571 *** sample size ranged from 563 to 216 005 *** age of participants ranged from 3 to 16 *** Meta analysis of the prevalence of TD was 6.1%（95%CI:0.036-0.100,I2=49.7%）.The prevalence of transient tic disorder（TTD）,chronic tic disorder（CTD） and Tourette syndrome（TS） were 1.7%（95%CI:0.009-0.031,I2=49%）,1.2%（95%CI:0.007-0.022,I2=48.3%） and 0.3%（95%CI:0.001-0.008,I2=49.5%） *** prevalence of TD in boys（5.1%,95%CI:0.026-0.098,I2=49.3%） was higher than that in girls（2.4%,95%CI:0.009-0.065,I2=49.4%）.The prevalence of TD in urban（2.6%,95%CI:0.019-0.034,I2=35.5%） was higher than that in rural area（2.2%,95%CI:0.016-0.030,I2=33.9%）.The prevalence of TD in central China（10.7%,95%CI:0.043-0.242,I2=49.2%） was higher than that in North China（7.8%,95%CI:0.007-0.522,I2=49.9%） and East China（4.4%,95%CI:0.015-0.120,I2=49.8%）.Conclusions:TD is a common disease in China,with prevalence differing based on sex,age,and region.

关键词： Tic disorders Children Prevalence Meta analysis China

Aicardi-Goutières syndrome type 7 in a Chinese child:A case report

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World Journal of Clinical Cases 2023年第11期11卷 2452-2456页

作者： Shuang-zhu Lin jing-jing Yang Tian-Long Xie jia-Yi Li jia-Qi Ma Si Wu Na Wang Yong-ji Wang Diagnosis and Treatment Center for Children Affiliated Hospital of Changchun University of Chinese MedicineChangchun 130021Jilin ProvinceChina College of Traditional Chinese Medicine Changchun University of Chinese MedicineChangchun 130017Jilin ProvinceChina

BACKGROUND IFIH1 is a protein-coding *** associated with IFIH1 include Aicardi-Goutières syndrome(AGS)type 7 and Singleton-Merten syndrome type *** pathways include RIG-I/MDA5-mediated induction of the interferon(IFN)-α/βpathway and the innate immune *** type 7 is an autosomal dominant inflammatory disorder characterized by severe neurological *** infancy,most patients present with psychomotor retardation,axial hypotonia,spasticity,and brain imaging changes Laboratory assessments showed increased IFN-αactivity with upregulation of IFN signaling and IFN-stimulated gene *** patients develop normally in the early stage,and then have episodic neurological *** SUMMARY The 5-year-old girl presented with postpartum height and weight growth retardation,language retardation,brain atrophy,convulsions,and growth hormone *** samples were obtained from peripheral blood from the child and her parents for whole-exome sequencing and test of genome-wide copy number *** mutations in the IFIH1 gene were *** examination at admission found that language development was delayed,the reaction to name calling was average,there was no communication with people,but there was eye contact,no social smile,and no autonomous ***,the child had rich gesture language and body language,could understand instructions,had bad *** she wants to achieve something,she starts crying or *** examination showed no obvious abnormality,and abdominal examination was *** muscle strength and muscle tone were symmetrical and slightly *** reflexes exist,but pathological reflexes were not *** We reported the clinical characteristics of a Chinese child with a clinical diagnosis of AGS type 7,which expanded the mutational spectrum of the IFIH1 gene.

关键词： Aicardi-Goutières syndrome type 7 IFIH1 gene Children Case report

Association between Polymorphisms of MALAT1 and Blood Lead Levels in Lead-exposed Workers

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Biomedical and Environmental Sciences 2018年第7期31卷 527-530页

作者： QIAN Xiu Rong CHEN Lin LIU ji Ting zhu Bao Li ZHAO Qiu Ni DING En Min WANG Bo Shen ZHANG Heng Dong XU Ming School of Public Health Nantong University Nantong 226019 Jiangsu China Institute of Occupational Disease Prevention Jiangsu Provincial Center for Disease Prevention and Control Nanjing 210028 Jiangsu China Key Laboratory of Environmental Medicine and Engineering Ministry of Education School of Public Health Southeast University Nanjing 210009 Jiangsu China School of Public Health Suzhou University Suzhou 215021 Jiangsu China Nanjing center for disease prevention and control Nanjing 210003 Jiangsu China

Lead,a heavy metal,which is nonessential but may be harmful to the human body,has been widely used to manufacture many products for use in the modern ***-acid batteries have the advantages of low price,high safety,and... 详细信息

关键词： Association between Polymorphisms of MALAT1 and Blood Lead Levels in Lead-exposed Workers BLL

Berberine Ameliorates High-Fat Diet-Induced Non-Alcoholic Fatty Liver Disease in Rats via Activation of SIRT3/AMPK/ACC Pathway

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Current Medical Science 2019年第1期39卷 37-43页

作者： Yu-pei ZHANG Yuan-jun DENG Kai-rui TANG Run-sen CHEN Shu LIANG Yin-ji LIANG Li HAN Ling jiN Zi-en LIANG Yan-ning CHEN qin-he YANG School of Traditional Chinese Medicine Jinan UniversityGuangzhou 510632China Department of Traditional Chinese Medicine the First Affiliated Hospital of Jinan UniversityGuangzhou 510630China

This study aimed to verify the effects of berberine(BBR)on the fat metabolism proteins involved in the sirtuin 3(SIRT3)/adenosine 5'-monophosphate(AMP)-activated protein kinase(AMPK)/acetyl-CoA carboxylase(ACC)pathway in the liver tissues of rats with high-fat diet(HFD)-induced non-alcoholic fatty liver disease(NAFLD).Forty-eight rats were randomly divided into the normal control(NC)group,HFD group or BBR group,with 16 rats in each *** 8 and 16 weeks of treatment,serum and liver samples were ***,body parameters,biochemical parameters and liver pathology were *** expression levels of proteins involved in the SIRT3/AMPK/ACC pathway in the liver were detected by Western *** 8 and 16 weeks of a HFD,the successful establishment of rat models with different degrees of NAFLD was confirmed by hematoxylin and eosin(H&E)and Oil Red O *** rat models exhibited obesity and hyperlipidemia,and the protein expression levels of SIRT3,p-AMPK.p-ACC,and CPT-1A in the liver were significantly decreased compared to those in the NC *** concurrent administration of BBR with the HFD effectively improved serum and liver lipid profiles and ameliorated liver ***,the protein expression levels of SIRT3,p-AMPK,p-ACC,and CPT-1 A in the liver were significantly increased in the BBR group as compared with those in the HFD *** conclusion,our data suggest that the mechanism by which BBR ameliorates HFD-induced hepatic steatosis may be related to the activation of the SIRT3/AMPK/ACC pathway in the liver.

关键词： berberine non-alcoholic fatty liver disease sirtuin 3 lipid metabolism

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基于渗透特性的MSW颗粒组成和结构分析

中国环境科学 2019年第1期39卷 203-209页

作者：秦蕊柯瀚胡杰兰吉武浙江大学软弱土与环境土工教育部重点实验室浙江杭州310058 浙江大学岩土工程研究所浙江杭州310058

在南方某填埋场埋深5～30m范围内取6组重约5kg的试样,对其进行筛分与分拣,研究垃圾颗粒组成随埋深的变化规律,同时对不同荷载作用下的垃圾试样进行染色切片,对比分析上覆压力对垃圾内部结构的影响.结果表明:对于不同埋深的城市固体废弃... 详细信息

在南方某填埋场埋深5～30m范围内取6组重约5kg的试样,对其进行筛分与分拣,研究垃圾颗粒组成随埋深的变化规律,同时对不同荷载作用下的垃圾试样进行染色切片,对比分析上覆压力对垃圾内部结构的影响.结果表明:对于不同埋深的城市固体废弃物,细颗粒(0D,即粒径<2cm)所占比例最大,几乎均超过50%,粗粒中2D颗粒所占比例最高,而塑料在2D颗粒中占比最大;随着荷载的增大,细粒含量增加,大孔隙和优先流通道减小.上覆压力主要通过减少垃圾内部孔隙通道,进而减小渗透系数;2D颗粒在荷载的作用下能定向排列,使渗流路径发生曲折,进而导致渗流各向异性.2D颗粒的定向排列是垃圾渗流各向异性产生的关键因素,其中塑料又是其最重要的因素.

关键词：城市固体废弃物(MSW) 渗透特性颗粒组成 2D颗粒内部结构

A Dual-band Circularly Polarized Microstrip Antenna for Multi- system Satellite Positioning Applications

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A Dual-band Circularly Polarized Microstrip Antenna for Mult...

第四届中国卫星导航学术年会

作者： Yuehua Luo qing ji Yaning zhu Shanghai High Gain Information and Technology Co. Ltd.

This paper presents a dual-band circularly polarized microstrip antenna for multi-system satellite positioning applications. The antenna consists two 4-feeding patch antennas and the PCB. The antenna operating band covers GPS L1/L2/L2C、GLONASS L1/L2 and Beidou L/B1/B2/B3, with good circular polarization and omni-directional radiation.

关键词： microstrip antenna dual-band circular polarization 4-feeding