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从Modula到Oberon

软件 1989年第1期10卷 54-61页

作者： wirth,N 武尚新

Long-term results of an anatomically implanted hip arthroplasty with a short stem prosthesis (MiniHip^(TM))

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World Journal of Orthopedics 2018年第10期9卷 210-219页

作者： Lars V von Engelhardt Andreas Breil-wirth Christian Kothny Jorn Bengt Seeger Christian Grasselli Joerg Jerosch Faculty of Health University of Witten/Herdecke Department of Trauma Surgery Orthopedics and Sports Medicine Katholisches Karl-Leisner Klinikum Department of Orthopedics Trauma Surgery and Sports MedicineJohanna Etienne Hospital Munich Ortho Center Department of Orthopaedics and Orthopaedic Surgery University Hospital Giessen and Marburg Department of Orthopaedics and Traumatology Waldburg-Zeil Clinic Tettnang

AIM To evaluate the clinical and radiological outcome nineand ten years after short-stemmed, bone preserving and anatomical hip arthroplasty with the MiniHip^(TM) system. METHODS In a prospective study, 186 patients underwent hip arthroplasty with a partial neck preserving short stem(MiniHip^(TM), Corin). Elderly patients were not excluded from this study, thus the mean age at the time of surgery was 59.3 years(range 32 to 82 years). Surgery and the follow-up assessments were performed at two Centers. Up until now, the mean follow-up was 112.5 ± 8.2 mo. The Oxford Hip Score(OHS) and the Hip Dysfunction Osteoarthritis and Outcome Score(HOOS) was assessed pre-and each year after surgery. The clinical follow-up was accompanied by standardized a.p. and axial radiological examinations. Periprosthetic lucencies, hypertrophies within the Gruen zones one to fourteen were assessed. A subsidence of the stem was investigated according to Morray and heterotopic ossifications were assessed according to *** The OHS and HOOS improved from 18 ± 3.3 to 46 ± 2.0 and from 30 ± 8.3 to 95 ± 4.6 points, P 0.05). Two stems were revised due to a symptomatic subsidence four and twelve months postoperatively. Thus, the survivorship for aseptic loosening at nine to ten years was 98.66%. Including one stem revision due to a symptomatic exostosis, bursitis and thigh pain as well as one revision because of a septic stem loosening, the overall survival for the stem with revision for any reason was 97.32%. Besides one asymptomatic patient, radiological signs of a proximal stress-shielding, such as bone resorptions within the proximal Gruen zones, were not noticed. Findings suggesting a distal loading, e.g., bony hypertrophies or bone appositions of more than 2 mm, were also not detected. CONCLUSION Regarding these first long-term results on the MiniHip^(TM), the implant performed excee

关键词： Primary hip arthroplasty Long-term results Short stem endoprothesis Prospective follow-up study Stress-shielding

Hip Arthroscopy in Children under the Age of Ten

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Open Journal of Orthopedics 2013年第1期3卷 41-48页

作者： Oliver Eberhardt Thomas wirth Francisco Fernandez Fernandez Orthopaedic Department Olgahospital Stuttgart Stuttgart Germany.

Arthroscopic hip surgery has become an established diagnostic and therapeutic method for addressing different hip pathologies. This paper focuses on hip arthroscopy for treating hip disorders in children under the age of 10. Arthroscopic hip surgery was performed 30 times on 24 children to address various hip pathologies. Indications were septic arthritis, benign soft tissue tumors, traumatic and congenital hip dislocation, juvenile idiopathic arthritis and osteochondroma of the acetabulum. Diagnostic arthroscopy was technically feasible in all cases. All cases of septic arthritis were successful treated using arthroscopic lavage and antibiotics. In the miscellaneous cases (benign fibrous tumor, juvenile idiopathic arthritis, osteochondroma congenital hip dislocations and traumatic hip dislocation) 4 hips had additional open surgery including surgical dislocation with synovectomy, open reduction and stabilization of the fractured posterior rim of the acetabulum, acetabulopasty and open resection of an osteochondroma with acetabuloplasty. In conclusion arthroscopic hip surgery is an additional diagnostic and therapeutic method that is suitable for treating different hip pathologies in children under the age of 10. Primary treatment of septic arthritis can be done easy by hip arthroscopy. Using cannulated mini arthroscopic hip instruments (2.7 mm), the range of application can be expanded to include treatment of very young infants. Hip arthroscopy can reduce the need of open surgery but cannot replace bony procedures in hip surgery.

关键词： Hip Arthroscopy Hip Disorders Arthroscopic Surgery Minimal Invasive Surgery

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陶瓷铝合金制动盘的开发

国外铁道车辆 1996年第3期33卷 46-48页

作者： X.wirth 于学辉

介绍德国研制的陶瓷铝合金制动盘,可以在高速列车、普通客车、轻轨客车及货物列车上使用。该制动盘可大大降低重量,提高预期使用寿命,并可显著地降低运营、维护成本。

关键词：制动盘陶瓷铁路机车铝合金

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Ceres网：一种低费用的计算机网络

软件 1990年第7期11卷 526-536页

作者： wirth,N 曹利华

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Oberon系统

软件 1990年第3期11卷 232-264页

作者： wirth,N 刑雅芬

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硬件体系结构与程序设计语言的相互支撑

计算机科学 1989年第4期16卷 65-68,15页

作者： N. wirth 徐宝文

程序设计语言与操作系统引入抽象概念使程序员可以忽略实现细节。支撑抽象的主要目的不只是提高实现效率,而且也提供必要的保护以避免违背抽象。由于对效率的狂热追求,第二个目的被忽视了。种种迹象表明,近来一些声称为简单而有效的设... 详细信息

程序设计语言与操作系统引入抽象概念使程序员可以忽略实现细节。支撑抽象的主要目的不只是提高实现效率,而且也提供必要的保护以避免违背抽象。由于对效率的狂热追求,第二个目的被忽视了。种种迹象表明,近来一些声称为简单而有效的设计是通过把代码生成与适当的保护这两者的复杂问题推卸给编译程序来达到效率的。软件设计与硬件设计的共同特点是其复杂性,这是通过通常的测试与模拟所控制不了的。硬件设计可以采用那些类似于程序设计中所使用的证明技术,从而利用程序设计方法学的研究成果。

关键词：体系结构程序设计硬件

EVALUATING EFFECTIVENESS OF MITIGATION OPTIONS FOR REDUCING GREENHOUSE GAS EMISSIONS FROM ENTERIC FERMENTATION

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EVALUATING EFFECTIVENESS OF MITIGATION OPTIONS FOR REDUCING ...

Effects of Flicker in a Distribution Grid with High PV Penetration

第三届国际甲烷与氧化亚氮减排技术大会

作者： Tom wirth Michael Gibbs Diana Pape U.S.Environmental Protection Agency

This paper summarizes an approach for evaluating the effectiveness of projects and programs designed to reduce greenhouse gas emissions from ruminant *** the principal greenhouse gas produced by ruminant livestock,methane is the focus of this *** livestock produce methane through a normal digestive process called’enteric fermentation’.During this process,bacteria in the digestive system break down feed into products that can be used by the animal for energy and *** amount of methane produced depends primarily on the animal’s type of digestive system and the amount and type of feed the animal *** paper focuses on estimating emission reductions from changes in animal management *** particular,the paper summarizes the approach as documented in the *** report entitled Evaluating the Greenhouse Gas Impacts of Ruminant Livestock Efficiency Projects（US EPA 2003a）.

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Journal of Energy and Power Engineering 2014年第12期8卷 2001-2011页

作者： Andreas Spring Georg wirth Gerd Becker Robert Pardatscher Rolf Witzmann Department of Electrical Engineering University of Applied Sciences Munich Munich 80335 Germany Department of Electrical Engineering and Information Technology Technische Universitat Miinchen Munich 80333 Germany

The quantity of installed PV （photovoltaic） systems in the German distribution grid is still increasing. In some areas, the installed PV capacity exceeds 5 kW per HC （house connection）. Therefore, the load flow changes its characteristics and leads to new requirements for the grid. In some areas, the power feedback is higher than the delivery and the installed PV capacity becomes the decisive factor for grid planning. This paper discusses the impact of PV systems on the flicker level. The focus hereby is on the correlation among the flicker level, the grid voltage and the meteorological parameters. Different approaches to investigate if there is an influence of PV systems on the maximum flicker are taken into account. Furthermore, an investigation if the normative limit is exceeded will be shown.

关键词： Grid integration stability PV.