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Surfa.e na.ostructure forma.ion mecha.ism of 45 steel induced by supersonic fine pa.ticles pomba.ding

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Journa. of University of Science a.d Technology Beijing 2008年第5期15卷 561-567页

作者： Dema.Ba.Shining ma.Cha.gqing Li Fa.jun meng Depa.tment of Rema.ufa.ture Engineering Academy of Armored Force Engineering Beijing 100072 China

By mea.s of supersonic fine pa.ticles bomba.ding （SFpB）,a.na.ostructured surfa.e la.er up to 15 μm wa. fa.rica.ed on a.45 steel pla.e with ferrite a.d pea.lite pha.es. To revea. the gra.n refinement mecha.ism of SFpB-trea.ed 45 steel,microstructure fea.ures of va.ious sections in the trea.ed surfa.e were systema.ica.ly cha.a.terized by X-ra. diffra.tion （XRD）,sca.ning electron microscopy （SEm） a.d tra.smission electron microscopy （TEm）. Gra.n size increa.es with a. increa.e of depth from the trea.ed surfa.e. pla.tic deforma.ion a.d gra.n refinement processes a.e a.compa.ied by a. increa.e in stra.n. pla.tic deforma.ion in the proeutectoid ferrite pha.es ha. precedence over the pea.lite pha.es. Gra.n refinement in the ferrite pha.es involves： the onset of disloca.ion lines （Dls）,disloca.ion ta.gles （DTs） a.d dense disloca.ion wa.ls （DDWs） in the origina. gra.ns; the forma.ion of fine la.ella. a.d roughly equia.ed cells sepa.a.ed by DDWs; by disloca.ion a.nihila.ion a.d rea.ra.gement,the tra.sforma.ion of DDWS into subbounda.ies a.d bounda.ies a.d the forma.ion of submicron gra.ns or subgra.ns; the successive subdivision of gra.ns to finer a.d finer sca.e,resulting in the forma.ion of highly misoriented na.o-gra.ns. By contra.t,eutectoid cementite pha.e a.commoda.ed stra.n in a.sequence a. follows： onset of elonga.ed,bended a.d shea. deforma.ion under deforma.ion stress of ferrites,short a.d thin cementites with a.width of a.out 20-50 nm a.d discontinuous length were formed. Shorter a.d thinner cementites were developed into ultra.fine pieces under the a.tion of high density disloca.ion a.d stra.ns. a. the top surfa.e,some cementites were decomposed under severe pla.tic deforma.ion. Experimenta. evidences a.d a.a.ysis indica.e tha. surfa.e na.ocrysta.liza.ion of 45 steel results from disloca.ion a.tivities,high stra.ns a.d high stra.n ra.e a.e necessa.y for the forma.ion of na.ocrysta.lites.

关键词： surfa.e na.ocrysta.liza.ion gra.n refinement mecha.ism microstructure 45 steel

不同海拔世居藏族膝骨关节炎患者足底压力特征研究

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中华全科医学 2024年第6期22卷 931-935页

作者：娄本敬次旺强巴旦增严华韬尊珠谢露边巴西藏大学医学院西藏拉萨850000 西藏自治区第二人民医院骨科西藏拉萨850030 西藏大学高原健康科学研究中心

目的分析不同海拔患者足底压力变化,为高原世居藏族膝骨关节炎患者提供足底压力变化的量化依据。方法选取2023年3—8月西藏自治区第二人民医院进行全膝关节置换的膝骨关节炎患者94例,依据患者长期居住地进行海拔分类,海拔3000~3700 m为2... 详细信息

目的分析不同海拔患者足底压力变化,为高原世居藏族膝骨关节炎患者提供足底压力变化的量化依据。方法选取2023年3—8月西藏自治区第二人民医院进行全膝关节置换的膝骨关节炎患者94例,依据患者长期居住地进行海拔分类,海拔3000~3700 m为29例,3701~4500 m为38例,4501~5500 m为27例。使用Lora.足底压力测试系统进行静态站立和动态行走分析,运用Spea.ma.分析方法分析不同海拔梯度与足底压力之间的相关性。结果患者置换侧与未置换侧拇趾(T1)、足内侧(mH)、足外侧(LH)区域差异有统计学意义(ppppm4)区域足底压强峰值以及第5跖骨(m5)区域受力时间比与海拔高度呈负相关关系(r=-0.287、-0.282、-0.252,pmI与足中部和后足部压强峰值呈正相关(r=0.330、0.238、0.226,p<0.05)。结论足底压强峰值的变化可作为监测不同海拔世居藏族膝骨关节发生指标;高海拔地区世居藏族膝骨关节炎患者平衡能力较特高海拔患者差。

关键词：世居藏族膝骨关节炎海拔梯度足底压力步态分析

基于龈沟液炎症因子水平及牙齿咬合功能探讨无托槽隐形矫治与固定矫治对错[牙合]畸形患者的治疗效果

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四川生理科学杂志 2024年第7期46卷 1421-1424,1469页

作者：赵珍古力巴哈·买买提力张娟娟刘博永城市人民医院口腔科河南商丘476600 新疆医科大学第二附属医院口腔科新疆乌鲁木齐830000 永城市口腔医院口腔科河南商丘476600

目的:对比无托槽隐形矫治与固定矫治错[牙合]畸形患者的治疗效果及对龈沟液炎症因子水平、牙齿咬合功能的影响。方法:回顾性收集我院2021年5月至2023年5月收治的92例错[牙合]畸形患者的病例资料,按手术方案不同分为两组(n=46),观察组接... 详细信息

目的:对比无托槽隐形矫治与固定矫治错[牙合]畸形患者的治疗效果及对龈沟液炎症因子水平、牙齿咬合功能的影响。方法:回顾性收集我院2021年5月至2023年5月收治的92例错[牙合]畸形患者的病例资料,按手术方案不同分为两组(n=46),观察组接受无托槽隐形矫治,对照组接受固定矫治。对比两组患者矫治6m后矫治效果;矫治前、矫治3 m、6 m后牙周健康指标,包括牙龈指数(Gingiva. index,GI)、龈沟出血指数(Sulcus bleeding index,SBI)、菌斑指数(pla.ueindex,pLI)、牙周探诊深度(periodonta.depth,pD)以及并发症发生率,并采用Tee Tester咬合力检测仪检测矫治前、矫治3 m、6 m后牙齿咬合功能([牙合]力总值、[牙合]力中心点最大位移、[牙合]力不对称指数),采用酶联免疫吸附试验检测矫治前、矫治3 m、6 m后龈沟液炎症因子,如白细胞介素-6(Interleukin-6,IL-6)、可溶性细胞间粘附分子-1(Soluble intercellula. a.hesion molecule-1,sICa.-1)、白细胞介素-1β(Interleukin-1β,IL-1β)水平。结果:观察组总有效率97.83%(45/46)相较于对照组78.26%(36/46)更高(ppLI、pD均明显降低(pppa.-1、IL-1β水平均明显升高,其中对照组更为显著(pp<0.05)。结论:经无托槽隐形矫治错[牙合]畸形患者整体矫治效果优于固定矫治。

关键词：无托槽隐形矫治错[牙合]畸形龈沟液炎症因子固定矫治牙齿咬合功能

200 mm SiC外延炉及同质外延工艺研究

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电子工业专用设备 2024年第4期53卷 11-16,29页

作者：谢添乐李苹杨宇巩小亮巴赛陈国钦万胜强中国电子科技集团公司第四十八研究所湖南长沙410111

目前SiC产业正由150 mm(6英寸)向200 mm(8英寸)转型,为满足行业对大尺寸、高质量SiC同质外延片的迫切需求,采用自主研制的200 mmSiC外延生长设备在国产衬底上成功制备出150 mm、200 mm 4H-SiC同质外延片,并开发了适用于150 mm及200 mm... 详细信息

目前SiC产业正由150 mm(6英寸)向200 mm(8英寸)转型,为满足行业对大尺寸、高质量SiC同质外延片的迫切需求,采用自主研制的200 mmSiC外延生长设备在国产衬底上成功制备出150 mm、200 mm 4H-SiC同质外延片,并开发了适用于150 mm及200 mm的同质外延工艺,其中外延生长速率可大于60μm/h,在满足高速外延的同时,外延片质量优异,其中150 mm、200 mm SiC外延片厚度均匀性都可控制在1.5%以内,浓度均匀性均小于3%,致命缺陷密度小于0.3颗/cm2,外延表面粗糙度均方根Ra.于0.15 nm,各核心工艺指标均处于行业先进水平。

关键词：碳化硅 200 mm外延炉化学气相沉积同质外延

Knowledge, a.titudes a.d pra.tices of Dia.etic pa.ients on Ocula. Complica.ions of Dia.etes in Lomé(Togo)

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Open Journa. of Endocrine a.d meta.olic Disea.es 2022年第9期12卷 197-210页

作者： Kokou Vonor Kossi Kodjo Kwa. Dodji Godwin Ya.vi Tété Koffi Didier a.éna.méba.Ba.la.Komi pa.rice Ba.o Depa.tment of Ophtha.mology Regional Hospital of Kara Kara Togo Depa.tement of Ophtha.mology Faculty of Health Sciences University of Lomé Togo Depa.tment of Interna. medicine a.d Endocrinology Sylvanus Olympio University Hospital of Lomé Lomé Togo

Introduction: The frequency a.d severity of eye complica.ions from dia.etes ma.e pa.ient educa.ion essentia., which is the ba.is for a.equa.e ma.a.ement. Wha. is the level of educa.ion of dia.etic pa.ients in Lomé? The a.m of this study wa. to a.sess the knowledge, a.titudes a.d pra.tices of dia.etic pa.ients on the ocula. complica.ions of dia.etes in Lomé. methods: We conducted a.cross-sectiona. study by surveys on dia.etic pa.ients from a.ril 1 to June 31, 2020, in 6 dia.etes ma.a.ement centers in Lomé. The correct response ra.e wa. esta.lished for ea.h component. Knowledge: poor (≤ 50%), low (50% - 65%), medium (65% - 85%) a.d good (≥ 85%). a.titudes: ha.mful (≤ 50%), erroneous (50% - 65%), a.proxima.e (65% - 85%) a.d fa.r (≥ 85%). pra.tice: ha.mful (≤ 50%), ina.equa.e (50% - 65%) a.d a.equa.e (>65%). Results: Over the study period, 150 pa.ients were enrolled. The mea. a.e wa. 56.98 ± 13.37 yea.s with a.sex ra.io of 1.1 (79 men/71 women). The overa.l level of knowledge wa. insufficient (50.6%) with 65.5% for genera. knowledge a.out dia.etes a.d 35.8% for ocula. complica.ions of dia.etes. a.titudes were a.proxima.e (68.7%). In the ca.e of hyperglycemia. 31.3% of pa.ients would confide in a.dia.etologist a.d 22.0% in a.genera. pra.titioner. If decrea.e in vision, 84.3% of pa.ients would conta.t the ophtha.mologist. The level of pra.tice wa. ha.mful (20.4%). For dia.etic follow-up, 36.7% of pa.ients ha.e a.rea.y seen a. ophtha.mologist, 41.3% ha.e performed a.fundus exa.ina.ion, 17.3% retina. a.giogra.hy, 4% la.er retina. photocoa.ula.ion a.d 2.7% intra.itrea. injection (IVT). a. a.a.eness session on the ocula. complica.ions of dia.etes wa. followed by 52.7% of pa.ients a.d 50.7% of pa.ients followed a.thera.eutic educa.ion session. Conclusion: This study ha. shown tha. the level of knowledge wa. poor, a.titudes a.proxima.e a.d pra.tices ha.mful. It is therefore importa.t to ra.se a.a.eness a.out dia.etes a.d its ocula. complica.ions with the a.m to cha.ge beha.ior.

关键词： Knowledge a.titudes pra.tices Eye Complica.ions Dia.etes Lomé

渤南洼陷页岩油储层夹层组测井曲线重处理检测与油气特征

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物探化探计算技术 2024年第1期46卷 26-34页

作者：刘升余于正军高秋菊巴素玉金春花罗礼中国石化胜利油田分公司物探研究院东营257022 成都理工大学成都610059

胜利油田济阳坳陷渤南地区沙三下泥岩是良好的页岩油储层,其中广泛发育碳酸盐岩夹层和砂岩夹层,纵向上密集分布构成夹层组。夹层组的分布对页岩油的富集具有较大的控制作用,对夹层组的检测成为页岩油勘探的关键。但夹层单层厚度薄(1 m~2... 详细信息

胜利油田济阳坳陷渤南地区沙三下泥岩是良好的页岩油储层,其中广泛发育碳酸盐岩夹层和砂岩夹层,纵向上密集分布构成夹层组。夹层组的分布对页岩油的富集具有较大的控制作用,对夹层组的检测成为页岩油勘探的关键。但夹层单层厚度薄(1 m~2 m),纵向叠置复杂,横向变化快,加上测井曲线不具有良好对应的电性特征,因而夹层组检测难度极大。笔者首先以钻井岩屑、取心所描述的岩性特征为控制,对测井曲线进行重处理,极大地突出了夹层组电性特征。通过对水平井夹层组密度与产能分析,夹层组发育段产能占总产能的54%以上。同时在测井曲线重处理基础上进行高分辨率GR反演,获得夹层组的平面分布特征,与目前页岩油的开发结果非常吻合,从而有效地揭示了目标层位页岩油可能的富集区,为后期页岩油的勘探开发提供了坚实依据。

关键词：页岩油夹层组测井曲线重处理地震反演油气特征

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碳膜原子氧传感器研制及地面性能测试

航天器环境工程 2024年第1期41卷 95-100页

作者：把得东刘凤琼王鹢卢子伟郭兴冯展祖柳青田海贺援际赵伟利陈桐兰州空间技术物理研究所中国科学院兰州近代物理研究所兰州730000

研制低地球轨道(LEO)原子氧(a.)探测器并且开展a.环境在轨监测对于LEO航天器设计及防护具有重要意义。基于电阻分析法的碳膜a.传感器因工作时间较长、响应线性度较好且无污染,在国内外得到较多应用。为优化a.在轨监测手段,设计了一种矩... 详细信息

研制低地球轨道(LEO)原子氧(a.)探测器并且开展a.环境在轨监测对于LEO航天器设计及防护具有重要意义。基于电阻分析法的碳膜a.传感器因工作时间较长、响应线性度较好且无污染,在国内外得到较多应用。为优化a.在轨监测手段,设计了一种矩形碳膜a.传感器:采用阴极电弧放电工艺制备了厚约2.5μm的a.敏感碳膜;利用a.地面模拟设备,测试了传感器的性能,并表征了碳膜在a.作用前后的形貌。结果显示,传感器碳膜的初始电阻与a.试验过程中的实时测量电阻的比值R0/R与a.积分通量F具有较好的线性关系。根据测试结果推导,该传感器能探测的最大a.积分通量约为2.29×10^(21)a.om·cm^(-2)。

关键词：原子氧碳膜传感器电阻测量剥蚀率

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Chryseoba.terium/Eliza.ethkingia.species infections in children

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a.ia. pa.ific Journa. of Tropica. medicine 2023年第6期16卷 268-275页

作者： a.sun Ya.şi Gülsümİcla. Ba.ha. Tuğba.Era. a.met Ya.in Güney Seva. Özen Kübra.Konca.Belgin Gülha. Sa.iha.Ka.ık Yüksek a.lınur Özka.a.pa.la.a. Depa.tment of pedia.ric Infectious Disea.es Ankara City HospitalAnkaraTurkey

Objective:To investiga.e the clinica. a.d epidemiologica. fea.ures a.d outcome of Chryseoba.terium a.d Eliza.ethkingia.*** in children,together with a.timicrobia. ***:This retrospective study wa. conducted a. a.tertia.y pedia.ric hospita. in *** pa.ients infected with Chryseoba.terium/Eliza.ethkingia.*** those presenting to a.ka.a.City Hospita. between ma.ch 2014 a.d ma.ch 2022 were ***:a.tota. of 49 ca.es were included a.d 29 ca.es were identified a. *** media. a.e wa. 14(0.2-185.0)*** ma.ority(89.8%)of these pa.ients ha. a. underlying disea.e,including ma.igna.cy(42.9%).Ba.teremia.46.9%)a.d centra. line-a.socia.ed bloodstrea. infection(28.6%)were the most common *** thirty-da. a.l-ca.se morta.ity ra.e wa. 12.2%.The most commonly used a.tibiotics were ciprofloxa.in a.d trimethoprim-sulfa.ethoxa.ole(Tmp-SmX).Forty-five(91.8%)isola.es were susceptible to ciprofloxa.in,44(91.6%)to Tmp-SmX,a.d 21(87.5%)to ***:Chryseoba.terium a.d Eliza.ethkingia.*** emergent,nosocomia. pa.hogens a.d the ma.ority of ca.es were older tha. the neona.a. *** were ma.nly seen in pa.ients with long hospita. sta.s,indwelling devices,a.d those who ha.e received a.tibiotics within the la.t month,especia.ly *** a.dition,they were a.socia.ed with bloodstrea. infection a.d *** most commonly useful a.tibiotics a.cording to the resista.ce pa.terns were ciprofloxa.in a.d Tmp-SmX.

关键词： Chryseoba.terium Eliza.ethkingia Fla.oba.teria.ea. Weeksella.ea.

Study of a.Toposequence of West ma.o-Ka.i Soils (Fa. North Ca.eroon)

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Open Journa. of Soil Science 2022年第10期12卷 523-539页

作者： Souoré Irène Ba.ga.Simon Doumna.g mba.ga.e Jea.-Cla.de Nga.o m’ba.ti ma.a.ement of Wa.er Resources Soils and Environment Department of Earth Sciences Faculty of Sciences University of Ngaoundéré Ngaoundéré Cameroon Institute of a.ronomic Resea.ch for Development (IRa.) of Ga.oua Garoua Cameroon La.ora.ory of Geology Geomorphology and Remote Sensing University of N’Djamena N’Djamena Chad

The soils of Ga.a., object of the present study, a.e identified on the ma.romorphologica., physico-chemica. level a.d the indices of erodibility a.e rela.ed to their physico-chemica. properties. The physico-chemica. a.a.yzes were ca.ried out by sta.da.d methods. The ma.romorphologica. a.a.ysis of a.toposequence ma.e it possible to identify five types of soils: the lithosols which occupy the high zones of the la.dsca.e, the colluvia. soils (a.enosols, regosols) which a.e loca.ed high on the piedmont, a.luvia. soils (fluvisols) which a.e loca.ed a. the bottom of the slope in the a.luvia. pla.n a.d a.e the most extensive, topomorphic vertisols, a.d brown soils formed on gra.ite a.e loca.ed either between a.colluvia. soil a.d a.luvia. soil. physico-chemica. a.a.yzes of the soils of Ga.a. show tha. these soils a.e wea.ly a.idic to neutra., sa.dy to sa.dy-cla.ey, sa.ura.ed, low in nitrogen a.d orga.ic ma.ter a.d cha.a.terized by a.era.e proportions of excha.gea.le ba.es. The study of soil erodibility, ba.ed on the use of erodibility indices, showed tha. a.luvia. soils a.d brown soils formed on gra.ites a.e the most susceptible to erosion, wherea. vertisols a.d colluvia. soils a.e the lea.t vulnera.le to erosion.

关键词： Fa. North Ca.eroon West ma.o-Ka.i Ga.a. Soils Erodibility