检索结果-南通市图书馆

胫骨高位截骨术失败后行全膝关节假体置换术的长期疗效观察

在线全文

学校读者我要写书评

暂无评论

中华创伤杂志 2009年第11期25卷 968-972页

作者：郭林杨柳 jean louis briard 段小军陈光兴张颖第三军医大学附属西南医院关节外科中心重庆400038

目的针对胫骨高位截骨术（high tibial osteotomy，HTO）失败后行全膝人工关节置换术（total knee arthroplasty，TKA）进行长期疗效观察，分析其远期临床疗效及术中注意事项。方法选择法国Medico—Chirurgical du Cedre中心1990年3月-1... 详细信息

目的针对胫骨高位截骨术（high tibial osteotomy，HTO）失败后行全膝人工关节置换术（total knee arthroplasty，TKA）进行长期疗效观察，分析其远期临床疗效及术中注意事项。方法选择法国Medico—Chirurgical du Cedre中心1990年3月-1992年6月18例（19膝）HTO术后失败的患者并行TKA治疗。所有关节均有内外侧间室退变，4例伴有外侧胫骨平台中度骨缺损。采用x线测量和膝关节协会评分系统（Knee Society Scoring System，KSS）评估手术疗效，x线测量包括髋膝踝角（hip knee ankle，HKA）、α角、β角、髌骨指数、胫骨平台后倾角等。结果TKA中11膝因HTO术后严重外翻和髌骨外侧半脱位而在TKA中行胫骨结节截骨及内移术；5膝因侧方软组织条件差或平衡不良而置人半限制型假体。随访时18例患者中2例死亡，获访16例（17膝）。无失访和翻修病例。7膝在随访时出现严重聚乙烯衬垫磨损，但临床症状较轻。随访时KSS平均147．2分，优良率82％。结论HTO术后行TKA临床疗效优良。但由于外翻畸形和髌股关节并发症多见，可能需采用胫骨结节截骨术并内移术；HTO术后外翻畸形为TKA软组织平衡和胫骨截骨造成一定困难，术前应准备置人限制性更高的假体。

关键词：关节成形术置换膝治疗失败胫骨高位截骨术

Scanning transmission electron microscopy and atom probe tomography analysis of non-stoichiometry long-period-stacking-ordered structures in Mg-Ni-Y/Sm alloys

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2024年第3期12卷 954-965页

作者： Yimeng Chen Manuel Legrée jean-louis Bobet Alexander Kvit CAMECA Instruments Inc MadisonWI 53711USA ICMCB Universitéde BordeauxPessacCEDEX 33608France NIAC&Materials Science Department University of WisconsinMadisonWI 53706USA

The long-period-stacking-ordered(LPSO)structure affects the mechanical,corrosion and hydrolysis properties of Mg *** current work employs high angle annular dark field-scanning transmission electron microscopy(HAADF-STEM)and atom probe tomography(APT)to investigate the structural and local chemical information of LPSO phases formed in Mg-Ni-Y/Sm ternary alloys after extended isothermal *** on the alloying elements and their concentrations,Mg-Ni-Y/Sm develops a two-phase LPSO+α-Mg structure in which the LPSO phase contains defects,hybrid LPSO structure,and Mg ***-STEM and APT indicate non-stoichiometric LPSO with incomplete Ni_(6)(Y/Sm)_(8) *** addition,the APT quantitatively determines the local composition of LPSO and confirms the presence of Ni within the Mg bonding *** results provide insight into a better understanding of the structure and hydrolysis properties of LPSO-Mg alloys.

关键词： Magnesium alloys Long-range ordering Atom probe tomography(APT) STEM HAADF Hydrolysis properties.

全膝关节置换术中股骨内髁滑移截骨治疗伴有关节外畸形的膝内翻

在线全文

学校读者我要写书评

暂无评论

骨科 2016年第5期7卷 308-312页

作者：陈昊郭林熊然古凌川罗江明杨柳 jean louis briard 第三军医大学附属西南医院关节外科中心重庆400038 法国鲁昂赛德尔矫形外科中心

目的探讨股骨内髁滑移截骨术（medial condyle sliding osteotomy,MCSO）在全膝关节置换术中纠正患者内翻膝关节外畸形的临床疗效。方法通过回顾性研究2013年1月至2015年12月在第三军医大学附属西南医院关节外科中心于全膝关节置换术... 详细信息

目的探讨股骨内髁滑移截骨术（medial condyle sliding osteotomy,MCSO）在全膝关节置换术中纠正患者内翻膝关节外畸形的临床疗效。方法通过回顾性研究2013年1月至2015年12月在第三军医大学附属西南医院关节外科中心于全膝关节置换术中采用MCSO在关节内纠正股骨侧的关节外内翻畸形的12例患者,统计该组患者手术前后的股骨远端外侧力线角（mechanical lateral distal femoral angle,m LDFA）、髋-膝-踝（hip-knee-ankle,HKA）角、疼痛视觉模拟量表（visual analogue scale,VAS）评分及美国膝关节协会（American Knee Society,AKS）综合评分系统中的膝评分和功能评分等,评价MCSO纠正关节外的内翻畸形的效果。结果本组患者随访6~40个月,无感染、骨折、假体松动、截骨不愈合等并发症发生。本组患者手术前后的m LDFA分别为117.4°±4.7°、91.6°±1.4°;手术前后的HKA角分别为167.2°±9.8°、179.6°±1.6°;手术前后的VAS评分分别为（6.4±1.1）分、（1.8±1.5）分;手术前后的AKS膝评分分别为（60.2±17.6）分、（92.6±9.4）分;手术前后的AKS功能评分分别为（69.4±21.3）分、（87.6±14.9）分。手术前后以上指标的差异均有统计学意义（均P〈0.05）。结论在合并关节外畸形的内翻膝的关节置换手术中,采用MCSO技术可以正确纠正内翻力线,更容易实现伸屈间隙平衡,达到满意的手术疗效。能有效避免对膝关节后内侧和内侧组织结构的过度松解,从而避免单纯依赖软组织松解而导致的屈曲位内侧间隙松弛及髌股关节对位不良等问题。

关键词：关节成形术,置换,膝内翻膝畸形截骨术

膝关节后交叉韧带保留型假体置换术15年远期疗效随访研究

在线全文

学校读者我要写书评

暂无评论

膝关节后交叉韧带保留型假体置换术15年远期疗效随访研究

Joint Management of Shared Resources, Issues and Conflicts of the Nso and Oku Tribes in the Ngongbaa Montane Forest Area, NWR of Cameroon

2009年中国运动医学与关节镜外科学术大会

作者：郭林杨柳 jean louis briard 段小军陈光兴戴刚第三军医大学西南医院关节外科中心

＜正＞目的:针对后交叉韧带（Posteriro Cruciate Ligament,PCL）保留型膝关节假体置换术进行15年以上临床随访研究,分析其临床疗效及失败原因。方法:随访Medico-Chirurgical du Cedre中心1990年9月至1992年3月在该中心行PCL保留型全膝...

＜正＞目的:针对后交叉韧带（Posteriro Cruciate Ligament,PCL）保留型膝关节假体置换术进行15年以上临床随访研究,分析其临床疗效及失败原因。方法:随访Medico-Chirurgical du Cedre中心1990年9月至1992年3月在该中心行PCL保留型全膝关节假体初次置换术的153例（178膝）患者。对其采用术后X线测量结合随访时国际膝关节协会临床评分评估手术疗效,X线测量包括HKA平均值、HKA绝对偏差、a角、b角、AP/AT指数、PDT

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Natural Resources 2024年第6期15卷 149-172页

作者： jean-louis Tatah Elvis Kah Department of Geography Faculty of Arts Letters and Social Sciences University of Yaounde I Yaounde Cameroon School of Geology and Mining Engineering University of Ngaoundere Ngaoundere Cameroon

Wherever people live together in or near homelands that harbour joint natural resources such as forest, water, minerals, oil etc., they must collaborate, co-exist and share these resources irrespective of their genetic, social, cultural, and political peculiarities. This is not always the case when self-interest, ethnic divisions, elitist politics, economic interest and power tussle set in. The Nso and Oku people who reside in the Ngongbaa Forest area constitute an example of joint management of resources where at one period, their relationship over the management of the Oku Mountain Forest was cordial and at another, the relationship became conflictive. This study was designed to study the influence of the KIFP forest management policies on the Nso indigenous forest Management system in Ngongbaa Forest, and its implications. The data collected for the study was secured through the administration of a questionnaire to residents of 10 villages adjacent to the Ngongbaa Forest, and forest users who carried out livelihood activities there between 1963 and 2015. These forest user groups include beekeepers, rat trappers, grazers, mushroom gatherers, ground honey/tree honey harvesters, carvers, etc. The investigation also extended to the traditional leaders of Nso and Oku who are in charge of the land tenure systems. The findings show that the Oku Mountain Forest is jointly owned by the Nso and Oku people. The Nso own the eastern half of the forest known as Ngongbaa Forest while the Oku own the western half, known as the Kilum Forest. The cordial relationship that existed between these people ensured the conservation of the forest. But the conflicts that later set in, especially due to the creation of the Kilum Mountain Forest Project in 1987 later changed to the Kilum Ijim Forest Project (KIFP) in 1992 sidelined the local communities which was contrary to the dispositions of the new Cameroon forest law enacted in 1994. Thus, the indigenous conservation practices became ig

关键词： Conflict Joint Management Shared Resources Ngongbaa Kilum Conservation

Statistical Study of the Geoeffectivity of Halo Coronal Mass Ejections Associated with X-Class Flares during Solar Cycles 23 and 24

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Applied Sciences 2024年第4期14卷 950-960页

作者： Younoussa Diakite Christian Zoundi M’Bi Kabore jean louis Zerbo Laboratoire de Chimie Analytique de Physique Spatiale et Energ&#233tique (L@CAPSE) Physics Department Universit&#233 Norbert Zongo Koudougou Burkina Faso Laboratoire de Maté riaux d&#8217H&#233liophysique et Environnement (LAMHE) Physics Department Universit&#233 Nazi Boni Bobo-Dioulasso Burkina Faso

By analysing a long series of data (1996-2019), we show that solar cycle 23 was more marked by violent solar flares and coronal mass ejections (CMEs) compared to solar cycle 24. In particular, the halo coronal mass ejections associated with X-class flares appear to be among the most energetic events in solar activity given the size of the flares, the speed of the CMEs and the intense geomagnetic storms they produce. Out of eighty-six (86) X-class halo CMEs, thirty-seven (37) or 43% are highly geoeffective;twenty-four (24) or approximately 28% are moderately geoeffective and twenty-five (25) or 29% are not geoeffective. Over the two solar cycles (1996 to 2019), 71% of storms were geoeffective and 29% were not. For solar cycle 23, about 78% of storms were geoeffective, while for solar cycle 24, about 56% were geoeffective. For the statistical study based on speed, 85 halo CMEs associated with X-class flares were selected because the CME of 6 December 2006 has no recorded speed value. For both solar cycles, 75.29% of the halo CMEs associated with X-class flares have a speed greater than 1000 km/s. The study showed that 42.18% of halo (X) CMEs with speeds above 1000 km/s could cause intense geomagnetic disturbances. These results show the contribution (in terms of speed) of each class of halo (X) CMEs to the perturbation of the Earth’s magnetic field. Coronal mass ejections then become one of the key indicators of solar activity, especially as they affect the Earth.

关键词： CME Halo (X) Geoeffectivity Geomagnetic Storm Solar Flare Solar Cycle

Experimental Assessment of the Thermal Performance of Two Corrugated Metal Roofs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Applied Sciences 2024年第9期14卷 2374-2392页

作者： Kouamé jean-louis Kouakou Ekoun Paul Magloire Koffi Bi Tra Désiré Zinla Prosper Gbaha Laboratoire des Procds Industriels de Synthse de lEnvironnement et des Energies Nouvelles Institut National Polytechnique Felix Houphout-Boigny Yamoussoukro Cte dIvoire

This experimental study is a contribution to the search for solutions to reduce indoor heat gain through sheet metal roofing in hot weather. It has evaluated the thermal impact of two different sheet metal roofs inside of two identical test buildings in sunny weather and cloudy weather conditions. Test building 1 has a single sheet corrugated roof and the building 2 is covered with roof made from top to bottom with corrugated sheet metal, a 12 mm thick serpentine copper tube in which water is circulated, a sheet of aluminium foil acting as a heat reflector, a 4 cm thick polystyrene panel and a 1.5 cm thick plywood. A maximum reduction of 15.1˚C in the temperature of the inner face of the test Building 2 roof was obtained comparatively to the temperature of the inner face of the test Building 1 roof consisting of a single sheet of metal at the warmest hours. In addition, the simple corrugated sheet metal roof of the test building generates high and varied temperatures inside the building. Whereas the proposed heat recovery roof favours low and relatively uniform temperatures inside the building. The proposed sheet metal roof construction technique is very effective in reducing the heat gain through the roof considerably;thus improving the thermal comfort inside sheet metal roofed dwellings. Hot water has been produced by recovering heat from the metal sheet of the roof of test building 2. The temperature of the hot water produced reached of 39˚C. This study could be also an alternative for the reduction of energy consumption due to the use of mechanical means for cooling of sheet metal roofed houses and the reduction of the use of fossil fuels for domestic hot water production.

关键词： Metal Roof Corrugated Time Lag Decrement Factor

Interpretation of Geological and Gravity Data from the Bamiléké Plateau (West-Cameroon): Implication for the Understanding of Its Underground Lithotectonic Geometry

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Geoscience and Environment Protection 2024年第9期12卷 283-314页

作者： louis Christian Kamgang Chendjou jean Victor Kenfack Jules Tcheumenak Kouémo Fidèle Koumetio Armand Kagou Dongmo Department of Earth Sciences Faculty of Science University of Dschang Dschang Cameroon Department of Earth Sciences Faculty of Sciences University of Douala Douala Cameroon Department of Physics Faculty of Sciences University of Dschang Dschang Cameroon

The Bamiléké Plateau represents a key domain in the understanding of the geodynamics associated with the central Cameroon shear. The study aimed to highlight the subsurface architecture of the plateaus basement setting with focus on high potential areas for hydrogeological and mining development projects. To this end, geological field observations were carried out. Since the structures sought were near-surface, a separation approach based on the upward continuation method was applied to the Bouguer anomaly grid. A set of processing techniques, including vertical derivative or DZ, analytical signal or SA and categorization of gravity signatures, was applied to generate the residual map. The synthesis geological model, obtained from analysis and interpretation of the various transformed maps and 2.5D modeling of two gravity profiles P1 and P2 highlights the following features: 1) intrusions of steep-sided granitic batholiths from Dschang to Bandjoun (profile P1), increasing in width from NW (Dschang) to SE (Bandjoun);2) larger volume batholiths with moderate sides located at Bafang and Bangangté (profile P1). These plutonic massifs were weakened by brittle deformation, which favored the emplacement of phonolite or anorthosite dykes within them. The emplacement of these dykes was accompanied by compressional faults with high dip between Dschang and Bandjoun and extensional faults with medium dip between Bafang and Bangangté. These fault zones (trending N85E to N95E) are ideal for hydrogeological investigations in a basement setting, as well as a series of dyke networks that could potentially be preferred zones for the circulation and accumulation of useful substances. The resulting geological sections P1 and P2 highlight the influence of granitic intrusions in the geological system of the study area, as well as the structural control associated with the various dyke intrusions. All the models obtained can serve as fundamental references for hydrogeological and mining e

关键词： Bamiléké Plateau Gravity Measurement Gravity Anomalies Lineaments

Lateral ring compression test applied to a small caliber steel jacket:Identification of a constitutive model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第6期36卷 133-148页

作者： Yann Coget Yael Demarty Christophe Czarnota Anthony Bracq jean-Sebastien Brest Alexis Rusinek French-German Research Institute of Saint-louis 5 Rue Du General Cassagnou68300 Saint-LouisFrance Laboratoire d'Etude des Microstructures et de Mecanique des Materiaux(LEM3) CNRSUniversite de LorraineArts&Metiers ParisTechF-57000 MetzFrance

The evolution of threats and scenarios requires continuous performance improvements of ballistic protections for armed *** a modeling point of view,it is necessary to use sufficiently precise material behavior models to accurately describe the phenomena observed during the impact of a projectile on a protective *** this context,the goal of this paper is to characterize the behavior of a small caliber steel jacket by combining experimental and numerical *** experimental method is based on the lateral compression of ring specimens directly machined from the thin and small *** speeds and temperatures are considered in a quasi-static regime in order to reveal the strain rate and temperature dependencies of the tested *** Finite Element Updating Method(FEMU)is *** results are coupled with an inverse optimization method and a finite element numerical model in order to determine the parameters of a constitutive model representative of the jacket *** of the present model are verified against experimental results and a parametric study as well as a discussion on the identified material parameters are *** results indicate that the strain hardening parameter can be neglected and the behavior of the thin steel jacket can be described by a modeling without strain hardening sensitivity.

关键词： Full metal jacket ammunition Lateral ring compression Inverse identification Numerical simulation