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| 1 | Current concepts in diagnosis and treatment of venous malformations显示文摘 | Judith N Ulrike E Siegmar R | 2014 | J Craniomaxillofac Surg2014，42，7： | 1 |
| 2 | Image-guided sphe-noid wing meningioma resection and simultaneous compu-ter-assisted cranio-orbital reconstruction:technical case report显示文摘 | Carsten W Ulrike E Siegmar Rt | 2007 | Neurosurgery2007，60，21： | 1 |
| 3 | Carbon nanotube actuators显示文摘 | Baughman R H Cui C X Zakhidov A A Iqbal Z Barisci J N Spinks G M Wallace G G Mazzoldi A De Rossi D Rinzler AG Jaschinski O Roth Siegmar Kertesz M | 1999 | Science1999，284，5418： | 1 |
| 4 | 显示文摘 | Mattew T A Siegmar D Kenneth D M | 2001 | J Mater Chem2001，11，： | 1 |
| 5 | The degree and kind of agglomeration affect carbon nanotube cytotoxicity显示文摘 | Peter Wick Pius Manser Ludwig K. Limbach Ursula Dettlaff-Weglikowska Frank Krumeich Siegmar Roth Wendelin J. Stark Arie Bruinink | 2006 | Toxicology Letters2006，，2： | 1 |
| 6 | Biomechanical analysis of stair ambulation in lower limb amputees显示文摘 | Thomas Schmalz Siegmar Blumentritt | 2007 | Gait & Posture2007，25，： | 1 |
| 7 | Modification of single-walled carbon nanotubes by hydrothermal显示文摘 | Georg S Duesberg Siegmar | 2003 | Chem Mater2003，15，17： | 1 |
| 8 | Current concepts in diagnosis and treatment of venous malformations 显示文摘 | Judith N Ulrike E Siegmar R | 2014 | J Craniomaxillofac Surg2014，，： | 1 |
| 9 | 重组人红细胞生成素治疗小儿慢性肾衰贫血显示文摘12例长期维持血液透析的慢性肾衰贫血患儿,每周静注3次重组人红细胞生成素(rHuEPO)。71.8±44.7u·kg^(-1)/次。治疗3.8±2.6个月后,红细胞压积(HCT)和血红蛋白(Hb)分别由0.21±0.01和67.9±2.8g/L升到0.31±0.02和102.4±6.0g/L(P均<0.001)。rHuEPO减量到35.7±14.6u·kg^(-1)/次,每周3次,HCT和Hb分别能维持在0.31±0.02和105.9±5.8g/L,铁蛋白也由治疗前838.8±141.1μg/L降到177.0±60.5μg/L(P<0.05)。整个治疗期间(4~36个月),所有患儿均不再输血,生活质量明显改善,无重要副作用。本文表明,初始小剂量rHuEPO静注可有效地治疗小儿慢性肾衰贫血。 | 朱松杰 Siegmar Devaux | 1996 | 广东医学1996，17，1： | 1 |
| 10 | Carbon nanostructures: An efficient hydrogen storage medium for fuel cells 显示文摘 | Kaylene A Siegmar R Michael H | 2001 | Fuel Cells Bulletin2001，4，38： | 1 |
| 11 | Current concepts in diagno- sis and treatment of venous malformations 显示文摘 | Judith N Ulrike E Siegmar R | 2014 | J Craniomaxillofac Surg2014，42，7： | 1 |
| 12 | Current concepts in diagnosis and treatment of venous malformations 显示文摘 | Judith N Ulrike E Siegmar R | 2014 | J Craniomaxillofac Surg2014，42，7： | 1 |
| 13 | Current concept in diagnosis and treatment of venous malforma- tion显示文摘 | JUDITH N ULRIKE E SIEGMAR R | 2014 | J Craniomaxillofac Surg2014，42，： | 1 |
| 14 | Growth and properties of few-layer graphene prepared by chemical vapor deposition显示文摘 | Hye Jin Park Jannik Meyer Siegmar Roth | 2010 | Carbon2010，48，4： | 1 |
| 15 | Formation of smectic and columnar liquid crystalline phases by cyclotriveratrylene (CTV) and cyclotetraveratrylene(CTTV) derivatives incorporating calamitic structural units显示文摘 | Ralph L Carsten T Siegmar D | 1997 | J Mater Chem1997，7，10： | 1 |
| 16 | Comparing two IBM implementations for the simulation of uniform packed beds显示文摘Nowadays,the design of fixed packed bed reactors still relies on empirical correlations,which,especially for small tube to particle diameter ratios,are mostly too inaccurate because of the presence of wall effects.Therefore,the simulation of fixed packed bed reactors plays an important role to predict and control the flow and process parameters in such,nowadays and in the future.Because of its straightforward applicability to non-uniform packings with particles of arbitrary shapes,the immersed boundary method(IBM)has advantages over other numerical methods and is used more and more frequently.This paper compares two approaches of IBMs for the simulation of fixed bed reactors with spherical shaped particles.The classic,smooth approach is compared to the straightforward to implement blocked-off method for velocity fields above the fixed bed for particle Reynolds numbers of 300 and 500.Results from experimental inline PIV-measurements of the reactor to be simulated serve as a basis for comparison.Very good agreement with the experiment is found for both simulation methodologies with higher resolutions,considering the more stable flow at a particle Reynolds number of 300.Differences in the different IBM approaches occurred for the more unsteady flow at a particle Reynolds number of 500.Compared to the blocked-off method,the smooth IBM reflects the formation of additional jets and recirculation zones better right above the bed,though increasing the fluid mesh resolution improves the accuracy of the blocked-off method.Overall,a more diffusive behaviour is found for the blocked-off simulations due to the stairstep representation,which is avoided by using interpolation stencils as in the smooth IBM.With higher mesh refinement in the blocked-off IBM this effect can be reduced,but this also increases the computational effort. | Christian Gorges Maximilian Brommer Christin Velten Siegmar Wirtz Enric Illana Mahiques Viktor Scherer Katharina Zahringer Berend van Wachem | 2024 | Particuology2024，86，3： | 0 |
| 17 | 内燃机车动力传动系统特征场和特征曲线场的计算图形显示文摘为了节约内燃机车燃油消耗,必须优化柴油机和传动装置的匹配。因而要对其共同工作的特征曲线场进行计算绘图,从而形成了有效的二维补偿计算,可以应用于特征曲线场的处理和驱动系统的模拟。 | SIEGMAR KGEL 文刀 | 1991 | 国外内燃机车1991，，5： | 0 |
| 18 | 199型米轨液力传动内燃机车显示文摘本文详细介绍了民主德国将110型内燃机车改造为新的米轨199型内燃机车的结构修改情况。除机车外形尺寸和一些主要部件作了修改外,还将二轴转向架改为三轴转向架,轴重由16.5t降为10t,轮径由1000mm改为850mm,最高速度由100km/h改为50km/h,通过最小曲线半径由100m改为50m。机车仍装用900kW的12KVD18/21型柴油机和GSR30/5.7型液力传动装置。但车轴齿轮箱改用AüK12.8型和AüK12.9型。已改造了2台样车,并作了试验。计划刊1992年要改造30台。 | Siegmar Seidewitz 韩才元 | 1990 | 国外内燃机车1990，，4： | 0 |
| 19 | Investigating the inflow into a granular bed using a locally resolved method显示文摘Discrete Element Method-Computational Fluid Dynamics(DEM/CFD)simulations of industrial-scale granular systems employ spatial averaging(porous media approach)for the fluid-particle interaction in the whole domain,which can lead to poor accuracy,for instance at flow inlets,as local particle bulk morphology is not resolved.This paper presents an approach where the interstitial flow in crucial areas with large gradients can be resolved locally in an otherwise unresolved domain,so that a mixed resolved-unresolved method is realized.As a generic example to show the feasibility and performance of the new approach,the inflow of ambient air into a flat-bottom hopper through a narrow orifice is investigated.In an experimental setup,the vertical profile of the pressure decay through the inlet and across the packing is chosen for com-parison with respective simulations.Results obtained with the conventional porous media method and the locally resolved approach are compared to these experiments for varying volume flow rates and for two different particle shapes.Spheres of different size as well as dodecahedrons are examined.It is found that although averaging methods already provide good approximations,the locally resolved method can improve the result especially when conventional drag laws are not applicable due to wall effects or if large velocity gradients exist. | Maximilian Brommer Maik Scharnowski Enric Illana Mahiques Siegmar Wirtz Viktor Scherer | 2024 | Particuology2024，85，2： | 0 |
| 20 | A numerical and experimental comparison of heat transfer in a quasi two-dimensional packed bed显示文摘Heat transfer plays a major role in many industrial processes taking place in packed beds.An accurate and reliable simulation of the heat exchange between particles is therefore crucial for a reliable operation and to optimize the processes in the bed.The discrete ordinates method(DOM)provides an established numerical technique to model radiative heat transfer in granular media that offers the possibility to consider the directional dependence of the radiation propagation.In this work,DOM is compared with Monte Carlo ray tracing,which provides an alternative method for heat transfer simulations.Geomet-rically simple configurations are used to investigate the influence of the angular discretization on the accuracy of the results and the computation time in both methods.The obtained insights are then transferred to a more complex configuration of a quasi two-dimensional test rig consisting of metal rods for which also experimental results are available.Our results show that both DOM and Monte Carlo ray tracing allow for an accurate simulation of heat transfer in packed beds.Monte Carlo ray tracing requires thereby computation times that are surprisingly competitive(although still somewhat slower)compared to DOM and allows for an easier computation of highly accurate reference solutions.In our preliminary comparison to the experimental test rig,Monte Carlo ray tracing also provides the advantage that it can more easily model highly specular materials such as stainless steel.Both methods are comparable for diffuse materials such as magnesium oxide. | Matthias Tyslik Mirko Ebert Martin Schiemann Siegmar Wirtz Christian Lessig | 2024 | Particuology2024，84，1： | 0 |
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