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信息安全与通信保密 1990年第1期12卷 74-78页

作者： Frank Hoornaert Marc Decroos joos vandewalle Rene Govaerts 王晓鸣

本文描述了RSA算法的硬件实现,是用120比特的位片处理器来实现的,这些处理器无需其它电路就可连在一起,以获得任意字长。对512比特的操作数,取幂运算少于30微秒。

关键词：取幂 RSA 密码学乘法运算预先计算电子签名接口卡通信结构数据通路进位加法

Factors associated with decreased compliance after on-site extracorporeal membrane oxygenation cannulation for acute respiratory distress syndrome:A retrospective,observational cohort study

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Journal of Intensive Medicine 2024年第2期4卷 194-201页

作者： Sylvain Le Pape Florent Joly François Arrivé Jean-Pierre Frat Maeva Rodriguez Maïa joos Laura Marchasson Mathilde Wairy Arnaud WThille Rémi Coudroy Centre Hospitalier Universitaire de Poitiers Service de Médecine Intensive RéanimationPoitiersFrance INSERM Centre d'Investigation Clinique 1402 IS-ALIVE Research GroupUniversitéde PoitiersPoitiersFrance

Background Extracorporeal membrane oxygenation(ECMO)for acute respiratory distress syndrome(ARDS)is systematically associated with decreased respiratory system compliance(CRS).It remains unclear whether transportation to the referral ECMO center,changes in ventilatory mode or settings to achieve ultra-protective ventilation,or the natural evolution of ARDS drives this change in respiratory ***,we assessed the precise moment when CRS decreases after ECMO cannulation and identified factors associated with decreased *** To rule out the effect of transportation and the different modes of ventilation on CRS,we conducted a retrospective,single-center,observational cohort study from January 2013 to May 2020,on 22 patients with severe ARDS requiring on-site ECMO and ventilated in pressure-controlled mode to achieve ultra-protective *** was assessed at different time points ranging from 12 h before ECMO cannulation to 72 h after ECMO *** primary outcome was the relative change in CRS between 3 h before and 3 h after ECMO *** secondary outcomes included variables associated with the relative changes in CRS within the first 3 h after ECMO cannulation and the relative changes in CRS at each time *** CRS decreased within the first 3 h after ECMO cannulation(−28.3%,95%confidence interval[CI]:−38.8 to−17.9,P<0.001),while the decrease was mild before and after these first 3 h after ECMO *** achieve ultra-protective ventilation,respiratory rate decreased in the mean by–13 breaths/min(95%CI:−15 to−11)and driving pressure by−8.3 cmH2O(95%CI:−11.2 to−5.3),resulting in decreased tidal volume by−3.3 mL/kg of predicted body weight(95%CI:−3.9 to−2.6)as compared to before ECMO cannulation(P<0.001 for all).Plateau pressure reduction,driving pressure reduction,and tidal volume reduction were significantly associated with decreased CRS after ECMO cannulation,whereas neither respiratory rate,positive end-expiratory pr

关键词： Acute respiratory distress syndrome Extracorporeal membrane oxygenation Driving pressure Respiratory compliance

Review on Efficacy and Health Services Research Studies of Complementary and Alternative Medicine in Inflammatory Bowel Disease

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Chinese Journal of Integrative Medicine 2011年第6期17卷 403-409页

作者： Stefanie joos Department of General Practice and Health Services Research University Medical Hospital Heidelberg Voβstrasse 2 69120 HeidelbergGermany

Objective：To assess the evidence of the use and efficacy for complementary and alternative medicine（CAM） in inflammatory bowel disease（IBD）. Methods：A systematic literature search in MEDLINE was performed for randomized controlled trials（RCTs） in Crohn＇s disease and ulcerative ***,a selective literature search for health services research studies on the use of CAM in patients with IBD was ***：Health services research studies showed a high use of CAM in adult and pediatric patients with IBD *** contrast to the high use among IBD patients,there was a lack of high-quality data for many of the used CAM *** most of the studies showed positive results,the methodological quality of most studies was rather low;therefore,the results had to be interpreted with *** there were many studies for probiotics and fish oil,RCTs for the highly used method homeopathy, for most herbal products,and for traditional Chinese medicine methods apart from acupuncture RCTs were completely ***：The lack of high-quality studies might be the consequence of the problems associated with the funding of clinical trials involving ***,having the high user rates in mind,high-quality studies assessing efficacy and safety of those methods are urgently ***,there is a need for better representation of CAM in undergraduate and postgraduate medical education.

关键词： complementary and alternative medicine inflammatory bowel disease Crohn's disease ulcerative colitis health services research health services research

Acupuncture treatment in gastrointestinal diseases: A systematic review

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World Journal of Gastroenterology 2007年第25期13卷 3417-3424页

作者： Antonius Schneider Konrad Streitberger Stefanie joos University Hospital Heidelberg Department of General Practice and Health Services Research Germany University Hospital Heidelberg Department of Anaesthesiology Germany

The purpose of this work was to assess the evidence for effectiveness of acupuncture （AC） treatment in gastrointestinal diseases. A systematic review of the Medline-cited literature for clinical trials was performed up to May 2006. Controlled trials assessing acupuncture point stimulation for patients with gastrointestinal diseases were considered for inclusion. The search identified 18 relevant trials meeting the inclusion criteria. Two irritable bowel syndrome （IBS） trials, 1 Crohn＇s disease and 1 colitis ulcerosa trial had a robust random controlled trial （RCT） design. In regard to other gastrointestinal disorders, study quality was poor. In all trials, quality of life （QoL） improved significantly independently from the kind of acupuncture, real or sham. Real AC was significantly superior to sham acupuncture with regard to disease activity scores in the Crohn and Colitis trials. Efficacy of acupuncture related to QoL in IBS may be explained by unspecific effects. This is the same for QoL in inflammatory bowel diseases （IBD）, whereas specific acupuncture effects may be found in clinical scores. Further trials for IBDs and in particular for all other gastrointestinal disorders would be necessary to evaluate the efficacy of acupuncture treatment. However, it must be discussed on what terms patients benefit when this harmless and obviously powerful therapy with regard to QoL is demystified by further placebo controlled trials.

关键词： Irritable bowel syndrome Inflammatorybowel disease Gastrointestinal disease Placebo Acupuncture

Newton-Multigrid for Biological Reaction-Diffusion Problems with Random Coefficients

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Numerical Mathematics(Theory,Methods and Applications) 2012年第1期5卷 62-84页

作者： Eveline Rosseel Nico Scheerlinck Stefan vandewalle Computer Science Department Katholieke Universiteit LeuvenCelestijnenlaan 200AB-3001 LeuvenBelgium

An algebraic Newton-multigrid method is proposed in order to efficiently solve systems of nonlinear reaction-diffusion problems with stochastic *** problems model the conversion of starch into sugars in growing *** stochastic system is first converted into a large coupled system of deterministic equations by applying a stochastic Galerkin finite element *** method leads to high-order accurate stochastic solutions.A stable and high-order time discretization is obtained by applying a fully implicit Runge-Kutta *** Newton linearization,a point-based algebraic multigrid solution method is *** order to decrease the computational cost,alternative multigrid preconditioners are *** results demonstrate the convergence properties,robustness and efficiency of the proposed multigrid methods.

关键词： Multigrid stochastic Galerkin finite element method reaction-diffusion problems implicit Runge-Kutta method and PDEs with random coefficients

Nonlinear Stochastic Galerkin and Collocation Methods:Application to a Ferromagnetic Cylinder Rotating at High Speed

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Communications in Computational Physics 2010年第10期8卷 947-975页

作者： Eveline Rosseel Herbert De Gersem Stefan vandewalle Computer Science Department K.U.LeuvenCelestijnenlaan 200A3001 LeuvenBelgium Faculty of Sciences K.U.LeuvenEtienne Sabbelaan 538500 KortrijkBelgium

The stochastic Galerkin and stochastic collocation method are two state-ofthe-art methods for solving partial differential equations(PDE)containing random *** the latter method,which is based on sampling,can straightforwardly be applied to nonlinear stochastic PDEs,this is nontrivial for the stochastic Galerkin method and approximations are *** this paper,both methods are used for constructing high-order solutions of a nonlinear stochastic PDE representing the magnetic vector potential in a ferromagnetic rotating *** model can be used for designing solid-rotor induction machines in various machining tools.A precise design requires to take ferromagnetic saturation effects into account and uncertainty on the nonlinear magnetic material *** issues of the stochastic Galerkin method are addressed and a numerical comparison of the computational cost and accuracy of both methods is *** stochastic Galerkin method requires in general less stochastic unknowns than the stochastic collocation approach to reach a certain level of accuracy,however at a higher computational cost.

关键词： Nonlinear PDE with random coefficients polynomial chaos stochastic collocation method stochastic Galerkin method electromagnetics

Experimental and Numerical Analysis of Natural Bio and Syngas Swirl Flames in a Model Gas Turbine Combustor

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Journal of Thermal Science 2016年第5期25卷 460-469页

作者： S.Iqbal A.C.Benim S.Fischer F.joos D.KluB A.Wiedermann CFS Dept.Mechanical and Process Eng.Düsseldorf University of Applied Sciences Laboratory of Turbomachinery Helmut Schmidt University Viessmann Werke Berlin GmbH Engineering Gas Turbines MAN Diesel and Turbo SE

Turbulent reacting flows in a generic swirl gas turbine combustor model are investigated both numerically and *** the investigation,an emphasis is placed upon the external flue gas recirculation,which is a promising technology for increasing the efficiency of the carbon capture and storage process,which,however,can change the combustion behaviour significantly.A further emphasis is placed upon the investigation of alternative fuels such as biogas and syngas in comparison to the conventional natural *** are also investigated numerically using the open source CFD software *** the numerical simulations,a laminar flamelet model based on mixture fraction and reaction progress variable is *** turbulence model,the SST model is used within a URANS *** results are compared with the experimental data,where a fair agreement is observed.

关键词： Gas turbine combustion turbulent combustion URANS laminar flamelet method

Role of the brain in the control of erection

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Asian Journal of Andrology 2006年第3期8卷 259-264,385页

作者： Yasin Temel Sepehr Hafizi SonnyTan VeerleVisser-vandewalle Department of Neurosurgery European Graduate School of Neuroscience(EURON)University Hospital Maastricht6202 AZ Maastrichtthe Netherlands Department of Pharmacology University of OxfordMansfield RoadOxfordOX1 3QTUK

In contrast to the spinal control of erection,relatively little is known about the brain *** the present review,we have outlined the role of brain structures involved in penile erection and provided a synopsis on the brain circuit of *** from both animal and human studies are *** suggests that the most important structures are the frontal lobe,cingulate gyrus,amygdala,thalamus and *** the brain circuit of erection,the thalamus serves as a gate-controller in which all relevant information is evaluated and further processed to higher and lower centres.

关键词： penile erection brain spinal circuit

New Trends in Olefin Production

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Engineering 2017年第2期3卷 171-178页

作者： Ismael Amghizar Laurien A. vandewalle Kevin M. Van Geem Guy B. Matin Laboratory for Chemical Technology Ghent University Ghent B-9052 Belgium

Most olefins （e.g., ethylene and propylene） will continue to be produced through steam cracking （SC） ofhydrocarbons in the coming decade. In an uncertain commodity market, the chemical industry is investingvery little in alternative technologies and feedstocks because of their current lack of economic viability,despite decreasing crude oil reserves and the recognition of global warming. In this perspective, some of themost promising alternatives are compared with the conventional SC process, and the major bottlenecks ofeach of the competing processes are highlighted. These technologies emerge especially from the abundanceof cheap propane, ethane, and methane from shale gas and stranded gas. From an economic point of view,methane is an interesting starting material, if chemicals can be produced from it. The huge availability ofcrude oil and the expected substantial decline in the demand for fuels imply that the future for proventechnologies such as Fischer-Tropsch synthesis （FFS） or methanol to gasoline is not bright. The abundance ofcheap ethane and the large availability of crude oil, on the other hand, have caused the SC industry to shiftto these two extremes, making room for the on-purpose production of light olefins, such as by the catalyticdehydrogenation of orooane.

关键词： Olefin production Steam cracking Methane conversionShale gas CO2 emissions

Dropping the pilot? A design strategy for a CFB reactor

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Dropping the pilot? A design strategy for a CFB reactor