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Accuracy of Helicobacter pylori serology in two peptic ulcer populations and in healthy controls

World Journal of Gastroenterology 2008年第32期14卷 5039-5045页

作者： Rolv-Ole Lindsetmo Roar Johnsen Tor jac.Eide Tore Gutteberg Hanne Haukland Husum Arthur Revhaug Department of Gastrointestinal Surgery University Hospital of North Norway and Institute of Clinical Medicine Troms University Institute of Public Health and General Practice Norwegian University of Science and Technology Department of Pathology National Hospital Department of Microbiology University Hospital of North Norway

AIM： To estimate the test characteristics of Heli- cobacter pylori （H pylori） serology and of c14-urea breath test （c14-UBT） in two different peptic ulcer populations and in community controls. Second, the aim was to explore the association between the level of Hpylori IgG antibodies and severity of inflammation as to active peptic ulceration in the same populations. METHODS： Vagotomized （n = 83）, medically treated peptic ulcer patients （n = 73） and one reference group of community controls （n = 88） were gastroscoped. H pylori status was determined by histology, bacterial growth, c14-UBT and serology. Based on the updated Sydney System, cumulative scores from biopsies from the prepyloruos, incisura angularis, corpus and fundus were calculated. RESULTS： The prevalence of Hpylori infection varied from 70% to 79%. The c14-UBT had high accuracy compared to the serology test. The sensitivity of the serology test was good, but the specificity was low （41%-71%）. The association between H pylori IgG antibodies and scores of gastric mucosal inflammation and current or previous peptic ulcer were weak. cONcLUSION： The accuracy of cI4-UBT to diagnose Hpylori infection was good, and the clinical utility of a negative H pylori serology test was substantial, while the gain in clinical information of a positive test was meagre. Positive H pylori titres could not distinguish between subjects with or those without active peptic ulceration.

关键词： c14-urea breath test Gastric inflammation Helicobacter pylori serology Peptic ulcers Test characteristics

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“双碳”背景下新能源汽车企业财务风险分析——以江淮汽车为例

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现代工业经济和信息化 2024年第1期14卷 258-260页

作者：石雨西藏民族大学财经学院陕西咸阳712000

随着“双碳”战略目标的推进与国家政策的扶持,新能源汽车产业规模的迅速扩大,企业的资金需求和投资规模也在增加,这导致新能源汽车企业面临着较大的财务风险。基于此,对江淮汽车的财务风险进行评估,并应用Z-Score模型对江淮汽车2018—2... 详细信息

随着“双碳”战略目标的推进与国家政策的扶持,新能源汽车产业规模的迅速扩大,企业的资金需求和投资规模也在增加,这导致新能源汽车企业面临着较大的财务风险。基于此,对江淮汽车的财务风险进行评估,并应用Z-Score模型对江淮汽车2018—2022年的财务指标进行分析,旨在发现企业在财务风险控制中的缺陷。

关键词：财务风险 Z-Score模型江淮汽车

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基于ANSYS的某车架有限元分析和轻量化设计

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内燃机与配件 2024年第11期 63-66页

作者：于晓燕朔州职业技术学院山西朔州038300

车架作为汽车的主要承载部件,其在移动时所受的载荷十分复杂,其强度刚度及稳定性的变化直接影响着整个行车的安全性和舒适性。车架设计的重点之一,就是在保证车架的力学强度,刚度和动力学稳定性的基础上,尽可能地把重量降到最轻,设计得... 详细信息

车架作为汽车的主要承载部件,其在移动时所受的载荷十分复杂,其强度刚度及稳定性的变化直接影响着整个行车的安全性和舒适性。车架设计的重点之一,就是在保证车架的力学强度,刚度和动力学稳定性的基础上,尽可能地把重量降到最轻,设计得更合理,并且尽可能地减少车架的过渡部分残余应力集中。本论文ansys分析为核心,在对江淮货车车架进行建模,对其进行满载弯曲,紧急制动,紧急转向等常见工作情况的应力及变形进行有限元分析,实现对整个车架进行轻量化和参数化设计。

关键词： ANSYS 有限元分析车架轻量化

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Progress and challenges in genome-wide studies to understand the genetics of diabetic retinopathy

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Annals of Eye Science 2018年第1期3卷 318-330页

作者： Kathryn P.Burdon Bennet J.Mccomish jac.c.charlesworth Menzies Institute for Medical Research University of TasmaniaHobartAustralia

There are many advantages to understanding the genetics of human *** markers can be used to calculate the risk of developing a disease,and elucidation of genetic risk factors can pinpoint the molecular aetiology of disease,which can facilitate the development of targeted *** retinopathy(DR)is a common complication of diabetes that has a significant impact on quality of *** has a clear genetic component,but determination of the genetic risk factors has proven *** date,genome-wide studies for DR have been conducted on relatively small patient cohorts compared to other complex eye diseases and replication of genetic findings has been *** disease is highly heterogeneous,confounding attempts to classify patients into appropriate groups for genetic analysis and making direct comparisons between studies *** studies to determine the genetic causes of DR will need to focus on larger sample sizes,detailed phenotyping and appropriate classification of *** co-operation and meta-analyses combining data from multiple studies will be critical to the discovery of genetic risk loci for DR.

关键词： Genome-wide association study diabetic complications genetic risk factors diabetic retinopathy(DR)

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Hydrogen embrittlement of X80 pipeline steel in H2S environment: Effect of hydrogen charging time, hydrogen-trapped state and hydrogen charging–releasing–recharging cycles

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International Journal of Minerals,Metallurgy and Materials 2020年第1期27卷 63-73页

作者： Peng-peng Bai Jie Zhou Bing-wei Luo Shu-qi Zheng Peng-yan Wang yu Tian State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China State Key Laboratory of Tribology Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China jac.Volkswagen Automotive co. Ltd.Hefei 230601China SINOPEc Tenth construction company Ltd.Qingdao 266555China

This study investigated the susceptibility of X80 pipeline steel to hydrogen embrittlement given different hydrogen pre-charging times and hydrogen charging–releasing–recharging cycles in H2S *** fracture strain of the steel samples decreased with increasing hydrogen pre-charging time;this steel degradation could almost be recovered after diffusible hydrogen was removed when the hydrogen pre-charging time wascoverable degeneration occurred when the hydrogen pre-charging time extended to 16–30 ***,nanovoid formation meant that the hydrogen damage to the steel under intermittent hydrogen pre-charging–releasing–recharging conditions was more serious than that under continuous hydrogen pre-charging *** study illustrated that the mechanical degradation of steel is inevitable in an H2S environment even if diffusible hydrogen is removed or visible hydrogen-induced cracking is ***,the steel samples showed premature fractures and exhibited a hydrogen fatigue effect because the repeated entry and release of diffusible hydrogen promoted the formation of vacancies that aggregated into *** results provide valuable information on the mechanical degradation of steel in an H2S environment,regarding the change rules of steel mechanical properties under different hydrogen pre-charging times and hydrogen charging–releasing–recharging cycles.

关键词： high-strength steel hydrogen embrittlement corrosion hydrogen diffusion

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由磁共振成像评估的主动脉弓脉搏波传导速度是心血管事件的预测因子:多种族动脉粥样硬化研究

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中华高血压杂志 2017年第8期25卷 724-724页

作者：刘莉叶鹏 Ohyama Y Ambale-Venkatesh B Noda c Kim JY Tanami Y Teixido-Tura G chugh AR Redheuil A Liu cY Wu cO Hundley WG Bluemke DA Guallar E Lima jac

通过磁共振成像评估的主动脉弓脉搏波传导速度（pulse wave velocity,PWV）对心血管病事件的预测价值尚未完全确定。为了评估多种族动脉粥样硬化研究（multi-ethnic study of atherosclerosis,MESA）受试者中主动脉弓PWV与心血管病的关... 详细信息

通过磁共振成像评估的主动脉弓脉搏波传导速度（pulse wave velocity,PWV）对心血管病事件的预测价值尚未完全确定。为了评估多种族动脉粥样硬化研究（multi-ethnic study of atherosclerosis,MESA）受试者中主动脉弓PWV与心血管病的关系,Ohyama等纳入3527例MESA受试者[基线时平均年龄为（62±10）岁,47%为男性],

关键词：脉搏波传导速度磁共振成像心血管病事件心血管事件预测价值 ethnic 四分位间距交互作用

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真丝及粘胶提花织物染色最佳工艺研究

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山东纺织科技 2017年第3期58卷 16-18页

作者：余杰嘉兴职业技术学院浙江嘉兴314000

文章针对目前真丝及粘胶提花织物染色工艺较为繁琐,染色不匀的情况,探究了使用分浴和同浴的染色工艺时,酸性染料和直接染料的工艺配方及流程,试验发现采用酸性染料与直接染料同浴染色,织物的上染效果较好,为相关企业提供一定参考。

关键词：真丝提花粘胶织物酸性染料直接染料分浴同浴

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一类非幂零极小惯量任意符号模式矩阵

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山西大学学报(自然科学版) 2010年第3期33卷 339-342页

作者：梅银珍高玉斌中北大学数学系

如果一个惯量任意符号模式的任意一个或多个非零元被零取代后所得到的符号模式不是惯量任意的,则这个惯量任意符号模式称为极小惯量任意符号模式(MIAP).文献[1]中In-jac.im等给出一类不可约的惯量任意符号模式ψ2k+1(k≥2),并证明了当k=... 详细信息

如果一个惯量任意符号模式的任意一个或多个非零元被零取代后所得到的符号模式不是惯量任意的,则这个惯量任意符号模式称为极小惯量任意符号模式(MIAP).文献[1]中In-jac.im等给出一类不可约的惯量任意符号模式ψ2k+1(k≥2),并证明了当k=2,3时是(MIAP).文章将证明k≥4时ψ2k+1也是(MIAP).

关键词：符号模式惯量任意极小惯量任意

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