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Numerical simulation and method study of X-ray litho-density logging

Nuclear Science and Techniques 2020年第12期31卷 129-138页

作者： Hua-Wei Yu Yu-Xin Zhang Xiang-Hong Chen Wen-Ding Wang chao-zhuo Liu Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580China School of Geosciences China University of Petroleum(East China)Qingdao 266580China College of Science China University of Petroleum(East China)Qingdao 266580China

To effectively replace the isotope radiation source in litho-density logging,this study presents a method for measuring the formation density and photoelectric absorption index(Pe)using a switchable X-ray ***,the gamma-ray litho-density logging(GLD)method for measuring formation density and Pe using chemical sources is ***,a benchmark verification based on the X-ray litho-density logging tool prototype and data published by Simon(In:Paper presented at the SPWLA 59th annual logging symposium,London,UK,2018)was carried out using Monte Carlo numerical ***,the impacts of the photoelectric effect and detector statistical error on the GLD method were ***,based on a theoretical analysis,the formation density and Pe measurement algorithm(double energy window(DEW)method)was improved,which was found to be suitable for X-ray litho-density ***,the results obtained using this algorithm were compared with those obtained using the GLD *** results indicate that owing to the impact of photoelectric effect and detector statistical error on the density energy window,the accuracy of formation density and Pe measurement using the GLD method is relatively low,with the uncertainty in formation density and Pe measurement reaching 2.620±0.047 g/cm3 and 4.090±0.580 b/e,*** comparison,the DEW method can improve the accuracy of density and Pe measurement to 0.006 g/cm3 and 0.065 b/e,respectively,as the photoelectric effect in the density window is corrected using the counts in the lithology window of the energy *** study aims to provide a new theoretical foundation for processing X-ray litho-density logs in the future.

关键词： X-ray controllable source Litho-density logging Monte Carlo simulation

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Sub-solvus Cellular Recrystallization and P Phase Formation in a Single-Crystal Superalloy Containing Re

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Acta Metallurgica Sinica(English Letters) 2015年第1期28卷 72-76页

作者： Long-chao zhuo Ming Huang Ji-Chun Xiong Jia-Rong Li Jing Zhu The State Key Laboratory of New Ceramics and Fine Processing Laboratory of Advanced Materials (MOE) School of Materials Science and Engineering National Center for Electron Microscopy in Beijing Tsinghua University Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Institute of Aeronautical Materials

Sub-solvus recrystallization behavior of a second-generation single-crystal superalloy has been studied by transmission electron microcopy and scanning transmission electron microcopy. Surface local stress facilitated cellular recrystallization accompanied with formation of twin structure and TCP phase of P during annealing at sub-solvus temperature of 1,100 °C. The precipitation of P phase is considered to be attributed to the coarsening of c0 phase in the recrystallized aggregates which lower the activation energy for atomic migration.

关键词： Nickel-based single-crystal superalloys Interfaces Recrystallization Twin boundary STEM

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Effect of Deformation Temperature on Deformation Mechanism of Fe-6.5Si Alloys with Different Initial Microstructures

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Journal of Iron and Steel Research International 2016年第4期23卷 344-349页

作者： Hua-dong FU Yuan-ke MO Long-chao zhuo Zhi-hao ZHANG Jian-xin XIE Institute for Advanced Materials and Technology University of Science and Technology Beijing School of Materials Science and Engineering Xi'an University of Technology

Deformation behaviors and mechanisms under different temperatures for columnar-grained Fe 6.5Si （mass%） alloys fabricated by directional solidification and equiaxed grained Fe-6.5Si alloy fabricated by forging were comparatively investigated. The results showed that, with increasing the deformation temperature from 300℃ to 500℃, the elongation increased from 2.9% to 30.1% for the equiaxed-grained Fe-6.5Si alloy, while from 6.6% to about 51% for the columnar-grained Fe-6.5Si alloy. The deformation mode of equiaxed-grained Fe 6.5Si alloy trans ferred from nearly negligible plastic deformation to large plastic deformation dominated by dislocation slipping. Comparatively, the deformation mode of the columnar grained alloy transferred from nearly negligible plastic deformation to plastic deformation dominated by the twining, and finally to plastic deformation dominated by dislocation slipping. Meanwhile, compared with the alloy with equiaxed grains, it was found that ultimate tensile strength and elongation could be increased simultaneously, which was ascribed for the twinning deformation in columnar-grained Fe-6.5Si al loy. This work would assist us to further understand the plastic deformation mechanism of Fe-6.5Si alloy and pro vide more clues for high-efficiency production of the alloy.

关键词： Fe-6.5Si alloy deformation behavior microstructure control mechanical property tensile deformation

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Effect of Warm Rolling on Micro-deformation Behavior and Mechanical Properties of Columnar-grained Fe-6.5 mass%Si Alloy

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Journal of Iron and Steel Research International 2016年第3期23卷 225-230页

Micro-deformation behavior and mechanical properties of columnar-grained Fe-6.5 mass%Si alloy before and after warm rolling were investigated by means of micro-indentation and three-point bending *** results show that the columnar-grained Fe-6.5mass%Si alloy before warm rolling presents sink-in mode of micro-indentation,while pile-up mode with a number of arc-shaped deformation bands exists in the warm-rolled *** with that of the alloy before warm rolling,the maximum bending fracture stress and maximum bending fracture deflection of the warm-rolled alloy are increased by 96% and 50%,*** different micro-deformation behavior and mechanical properties of the columnar-grained Fe-6.5mass%Si alloy are ascribed to the changes of dislocation density,dislocation configuration and long-range order degree,which significantly improve the room temperature plasticity of the alloy after warm rolling.

关键词： Fe-6.5mass%Si alloy warm rolling micro-deformation mechanical property

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基于灰色关联度和主成分分析的涪陵区茎瘤芥种植气候适宜性评估

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农学学报 2024年第8期14卷 89-95页

作者：倪超李新江吴思颖向涛徐东卓超栾松郭志重庆市涪陵区气象局重庆408000 重庆舍特气象应用研究所有限责任公司重庆404100

为了确定茎瘤芥(榨菜)在涪陵区的适宜种植区域,通过利用灰色关联度和主成分分析方法,结合19个生物气候指标,开展其气候适宜性分析,对涪陵区各乡镇村社的种植气候适宜性进行综合评估。研究发现,等权关联和综合评价模型的结果均支持将涪陵... 详细信息

为了确定茎瘤芥(榨菜)在涪陵区的适宜种植区域,通过利用灰色关联度和主成分分析方法,结合19个生物气候指标,开展其气候适宜性分析,对涪陵区各乡镇村社的种植气候适宜性进行综合评估。研究发现,等权关联和综合评价模型的结果均支持将涪陵区421个村社的种植气候适宜性划分为3类:Ⅰ类为高适宜区(λ≥0.913),包括新妙、石沱东南部、义和、马鞍南部、龙桥、崇义、江北、南沱西北部、百胜东南部、珍溪东南部、白涛部分地区、荔枝部分地区、江东部分地区;Ⅱ类为中适宜区(0.764≤λ<0.913),包括增福、石沱西北部、义和北部、李渡、马鞍北部、蔺市北部、荔枝大部分、江东南部、白涛东北部、焦石西南部;Ⅲ类为低适宜区(λ<0.764),包括龙潭、同乐、青羊、马武、大木、武陵山、罗云、焦石、百胜西北部、珍溪西北部。结果表明,涪陵西北、东北地区是茎瘤芥种植的较佳适宜地。通过研究,为涪陵区茎瘤芥生产的合理布局提供决策参考,有助于促进茎瘤芥产业健康持续发展。

关键词：灰色关联度气候适宜性主成分分析种植茎瘤芥涪陵区

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2020-2021年中国10所教学医院院内感染常见病原菌分布和耐药监测

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中华检验医学杂志 2024年第6期47卷 619-628页

作者：李曙光鲁炳怀褚云卓张嵘曾吉苏丹虹卓超金炎徐修礼廖康胡志东王辉北京大学人民医院检验科北京100044 中日友好医院呼吸与危重症医学科二部临床微生物与感染实验室北京100029 中国医科大学附属第一医院检验科沈阳110001 浙江大学医学院附属第二医院检验科杭州310009 华中科技大学同济医学院附属普爱医院检验科武汉430033 广州医科大学附属第一医院检验科广州510120 广州医科大学附属第一医院呼吸疾病国家重点实验室广州510120 山东省立医院检验科济南250021 空军军医大学西京医院检验科西安710032 中山大学附属第一医院检验科广州510080 天津医科大学总医院医学检验科天津300052

目的监测2020—2021年我国引起院内感染的主要病原菌的病原谱分布和对主要抗菌药物的敏感性。方法回顾性收集来自我国10家教学医院的引起院内血流感染(BSI,670株)、医院获得性肺炎(HAP,394株)和院内腹腔感染(IAI,247株)的病原菌1311株... 详细信息

目的监测2020—2021年我国引起院内感染的主要病原菌的病原谱分布和对主要抗菌药物的敏感性。方法回顾性收集来自我国10家教学医院的引起院内血流感染(BSI,670株)、医院获得性肺炎(HAP,394株)和院内腹腔感染(IAI,247株)的病原菌1311株。经中心实验室复核菌株后,对临床常见菌株进行抗菌药物药敏试验,采用琼脂稀释法或微量肉汤稀释法测定菌株的最低抑菌浓度(MIC),药敏折点采用美国临床和实验室标准协会2023年M100(第33版)标准。使用χ^(2)检验进行率的比较。结果BSI最主要的致病菌是大肠埃希菌(21.2%,142/670)、肺炎克雷伯菌(14.9%,100/670)和金黄色葡萄球菌(11.5%,77/670);HAP最主要致病菌是肺炎克雷伯菌(27.7%,109/394)、鲍曼不动杆菌(22.1%,87/394)和铜绿假单胞菌(18.3%,72/394);IAI最主要的致病菌是大肠埃希菌(24.3%,60/247)、屎肠球菌和肺炎克雷伯菌(均为14.6%,36/247)。金黄色葡萄球菌对替加环素、利奈唑胺、达托霉素和糖肽类抗菌药物均表现为敏感。甲氧西林耐药的金黄色葡萄球菌(MRSA)和凝固酶阴性葡萄球菌(MRCNS)的检出率分别为36.5%(42/115)和74.5%(38/51)。屎肠球菌和粪肠球菌对万古霉素的耐药率分别为3.3%(3/90)和1.9%(1/53)。肺炎克雷伯菌和大肠埃希菌中超广谱β内酰胺酶的检出率分别为23.7%(58/245)和60.5%(130/215),碳青霉烯耐药株的检出率分别为29.8%(73/245)和4.2%(9/215),对替加环素的耐药率分别为1.6%(4/245)和0,对黏菌素的耐药率分别为1.6%(4/245)和2.8%(6/215),对头孢他啶/阿维巴坦的耐药率分别为2.0%(5/245)和2.3%(5/215)。鲍曼不动杆菌除对黏菌素(98.8%,161/163)和替加环素(89.6%,146/163)表现出较高的敏感性,对其他抗菌药物均表现出较高的耐药率,碳青霉烯耐药株的检出率达到76.7%(125/163)。碳青霉烯耐药的铜绿假单胞菌检出率为28.4%(33/116);黏菌素、阿米卡星和头孢他啶/阿维巴坦对铜绿假单胞菌表现出较强的抗菌活性,敏感率分别为99.1%(115/116)、94.0%(109/116)和83.6%(97/116)。结论引起院内感染的主要病原菌是肺炎克雷伯菌、大肠埃希菌、鲍曼不动杆菌、铜绿假单胞菌和金黄色葡萄球菌。替加环素、黏菌素和头孢他啶/阿维巴坦对大部分常见革兰阴性杆菌表现出较强的抗菌活性。鲍曼不动杆菌耐药问题依然严重。碳青霉烯耐药的肠杆菌目细菌检出率继续升高,需继续加强抗菌药物合理应用及医院感染防控。

关键词：医院内感染细菌感染血流感染医院获得性肺炎腹腔感染抗菌药物药敏试验耐药性

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Furazolidone-induced pulmonary toxicity in Helicobacter pylori infection:Two case reports

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World Journal of Clinical Cases 2023年第12期11卷 2832-2838页

作者： Yao Ye Zi-Ling Shi zhuo-chao Ren Yi-Lan Sun Geriatric Medicine Center Department of Pulmonary and Critical Care MedicineZhejiang Provincial People’s HospitalAffiliated People’s HospitalHangzhou Medical CollegeHangzhou 310014Zhejiang ProvinceChina Graduate School of Clinical Medicine Bengbu Medical CollegeBengbu 233000Anhui ProvinceChina

BACKGROUND Helicobacter pylori(***)infection is a global problem,causing significant morbidity and *** is recommended to eradicate *** infections in China owing to the highly associated antibiotic *** SUMMARY This article presents two cases of lung injury caused by furazolidone treatment of *** infection and the relevant literature *** patients developed symptoms,including fever,cough,and fatigue after receiving a course of furazolidone for *** *** computed tomography showed bilateral interstitial *** studies revealed elevated blood eosinophil *** discontinuing furazolidone with or without the use of corticosteroids,the symptoms improved rapidly.A PubMed database literature search revealed three reported cases of lung injury suggestive of furazolidone-induced pulmonary *** Clinicians should be aware of the side effects associated with the administration of furazolidone to eradicate *** infection.

关键词： Furazolidone Helicobacter pylori infection Pulmonary hypersensitivity Case report

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血浆氨基酸水平及CD64感染指数鉴别AECOPD重症患者合并细菌感染的临床价值

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热带医学杂志 2024年第5期24卷 685-688,703页

作者：谢栩硕杨玲卓超张浩温焕连广州医科大学附属第一医院感染内科广东广州510120

目的探究慢性阻塞性肺疾病急性加重(AECOPD)重症患者合并细菌感染后,血浆氨基酸水平及CD64感染指数变化。方法回顾性分析2022年1-12月广州医科大学附属第一医院收治的75例AECOPD重症患者的临床资料,根据患者是否合并细菌感染分为感染组(... 详细信息

目的探究慢性阻塞性肺疾病急性加重(AECOPD)重症患者合并细菌感染后,血浆氨基酸水平及CD64感染指数变化。方法回顾性分析2022年1-12月广州医科大学附属第一医院收治的75例AECOPD重症患者的临床资料,根据患者是否合并细菌感染分为感染组(n=41)及未感染组(n=34),比较感染组与未感染组患者血浆必需氨基酸、非必需氨基酸水平差异,使用受试者工作特征(ROC)曲线分析差异有统计学意义的氨基酸种类对AECOPD重症患者合并细菌感染的诊断效能。比较两组患者炎症指标[CD64感染指数、可溶性髓系细胞触发受体-1(sTREM-1)、C反应蛋白(CRP)]水平差异,ROC曲线分析CD64感染指数、sTREM-1、CRP对AECOPD重症患者合并细菌感染的诊断效能。结果感染组患者苏氨酸、精氨酸、甘氨酸、天冬酰胺、瓜氨酸、谷氨酸、组氨酸、蛋氨酸、丝氨酸水平均高于未感染组,差异均有统计学意义(t=3.363、2.730、5.923、3.191、5.823、6.356、2.374、5.011、6.352,P均<0.05)。ROC曲线显示,谷氨酸、丝氨酸、甘氨酸、瓜氨酸、蛋氨酸、精氨酸、苏氨酸、组氨酸、天冬酰胺对AECOPD重症患者合并细菌感染的诊断效能曲线下面积(AUC)分别为0.875、0.848、0.840、0.828、0.802、0.761、0.670、0.638、0.602,差异有统计学意义(P<0.05);感染组患者CD64感染指数、sTREM-1、CRP水平均高于未感染组,差异均有统计学意义(t=11.855、6.826、3.166,P均<0.05);ROC曲线显示,CD64感染指数、sTREM-1、CRP对AECOPD重症患者合并细菌感染的诊断效能AUC分别为0.977、0.798、0.693,差异有统计学意义(P<0.05)。结论部分氨基酸、CD64感染指数、sTREM-1、CRP在AECOPD重症发生细菌感染后会发生显著变化,且具有一定辅助诊断细菌感染的价值。

关键词：慢性阻塞性肺疾病急性加重细菌感染氨基酸 CD64感染指数

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Nonlinear amplitude versus angle inversion for transversely isotropic media with vertical symmetry axis using new weak anisotropy approximation equations

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Petroleum Science 2020年第3期17卷 628-644页

作者： Lin Zhou zhuo-chao Chen Jing-Ye Li Xiao-Hong Chen Xing-Ye Liu Jian-Ping Liao Hunan Provincial Key Laboratory of Shale Gas Resource Utilization Hunan University of Science and TechnologyXiangtan 411201HunanChina State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China National Engineering Laboratory for Offshore Oil Exploration.China University of Petroleum Beijing 102249China College of Geology and Environment Xi'anUniversity of Science and TechnologyXi'an 710054ShaanxiChina

In VTI media,the conventional inversion methods based on the existing approximation formulas are difficult to accurately estimate the anisotropic parameters of reservoirs,even more so for unconventional reservoirs with strong seismic ***,the above problems can be solved by utilizing the exact reflection coefficients ***,their complicated expression increases the difficulty in calculating the Jacobian matrix when applying them to the Bayesian deterministic ***,the new reduced approximation equations starting from the exact equations are derived here by linearizing the slowness *** relatively simple form and satisfactory calculation accuracy make the reduced equations easy to apply for inversion while ensuring the accuracy of the inversion *** addition,the blockiness constraint,which follows the differentiable Laplace distribution,is added to the prior model to improve contrasts between ***,the concept of GLI and an iterative reweighted least-squares algorithm is combined to solve the objective ***,we obtain the iterative solution expression of the elastic parameters and anisotropy parameters and achieve nonlinear AVA inversion based on the reduced *** test results of synthetic data and field data show that the proposed method can accurately obtain the VTI parameters from prestack AVA seismic data.

关键词： Transversely isotropic media with vertical symmetry axis(VTI) New reduced approximation equations Differentiable Laplace distribution Blockiness constraint

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Thermal Annealing Behavior of Helium in Ti Films Deposited by Magnetron Sputtering

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Chinese Physics Letters 2012年第1期29卷 64-67页

作者： ZHANG Lei HE Zhi-Jiang LIU chao-zhuo WANG Xu-Fei SHI Li-Qun Applied Ion Beam Physics Laboratory Institute of Modern PhysicsFudan UniversityShanghai 200433

Helium contents of up to 30at.% are prepared in sputter-deposited Ti *** annealing behaviors of helium including the depth profiles and the evolution of helium bubbles in the films at different temperatures are examined by ion beam analysis including Rutherford backscattering spectrometry (RBS) and elastic recoil detection analysis (ERDA),as well as thermal helium desorption spectroscopy (THDS).It is found that the energy spreading induced by structural inhomogeneities in the spectra of RBS and ERDA as well as the increment in the width of spectra occurs,which corresponds to the change of stopping cross-section of helium atoms in the Ti film due to the change of physical-state of helium in the evolution of helium *** ion beam analysis on the helium evolution is consistent with the THDS *** beam technique opens interesting possibilities in the characterizing on the growth of helium bubbles.

关键词： measurement. THDS increment

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