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1214篇 您的检索式:作者名="Uhlmann"
    题名 作者 年代 出处 被引量
1离心力补偿卡盘高速回转夹紧特性研究显示文摘通过对高速切削过程中卡盘和工件的受力与变形分析,建立了离心力补偿卡盘夹紧力变化的理论分析计算模型,并进行了实验验证。研究了卡盘的实际夹紧力变化、离心力补偿效率、夹紧力迟滞等高速回转夹紧特性,指出了卡盘设计和使用中应注意的问题,为更加合理有效地发挥离心力补偿卡盘的高速潜能、提高高速车削过程的安全性提供了科学的技术依据。冯平法 郁鼎文 吴志军 Uhlmann E 2007中国机械工程2007,18,14:15
2高速旋转卡盘及工件刚度对动态夹紧力的影响显示文摘为解决高速车削对工件夹紧系统要求越来越高的问题,采用理论分析、有限元计算和实验研究相结合的方法定量分析了高速旋转卡盘和工件刚度对动态夹紧力的影响规律。研究表明:并非100%的卡爪离心力转化为卡盘的动态夹紧力损失,工件刚度越低,动态夹紧力损失越小。卡盘通过其径向刚度和弯曲刚度综合影响动态夹紧力变化,高的卡盘单元径向刚度对降低动态夹紧力损失有利;在工件刚度较大时,采用较低的卡盘弯曲刚度有助于降低动态夹紧力损失。该文的计算模型具有较高的精度,对提高高速车削过程的安全性并充分发挥卡盘的高速潜能以及高速卡盘的优化设计与应用具有重要意义。冯平法 郁鼎文 吴志军 Uhlmann E 2007清华大学学报(自然科学版)2007,47,8:6
3难加工材料的超声波磨削显示文摘对由陶瓷、玻璃、硬质合金、金属陶瓷、人造聚晶金刚石或纤维强化复合材料制成的工件进行切削加工,尤其是要形成复杂轮廓外形的工件时,已经证实这种加工任务是特别困难的。超声波辅助磨削加工是一种创新的工艺方法,采用这种方法可以快速和精密地加工这些难加工材料。Eckart Uhlmann Sven-Erik Holl 1999机电信息(北京)1999,,2:2
4脑卒中血栓切除术后血压与短期和长期功能转归的相关性显示文摘缺血性脑卒中机械性血栓切除术后的转归可能受血压的影响。该研究旨在评估全身麻醉期间和清醒镇静期间血压变化与机械性血栓切除术后功能性转归的关系。血管内治疗脑卒中的镇静与气管插管研究是一项涉及血压目标值的,比较在全身麻醉与在清醒镇静的条件下行机械血栓切除疗效的单中心随机试验。刘青 叶鹏 Schnenberger S Uhlmann L Ungerer M Pfaff J Nagel S Klose C Bendszus M Wick W Ringleb PA Kieser M Mhlenbruch MA Bsel J 2018中华高血压杂志2018,26,7:2
5Semiautomated 3D Root Segmentation and Evaluation Based on X-Ray CT Imagery显示文摘Background.Computed X-ray tomography(CTX)is a high-end nondestructive approach for the visual assessment of root architecture in soil.Nevertheless,in order to evaluate high-resolution CTX data of root architectures,manual segmentation of the depicted root systems from large-scale volume data is currently necessary,which is both time consuming and error prone.The duration of such a segmentation is of importance,especially for time-resolved growth analysis,where several instances of a plant need to be segmented and evaluated.Specifically,in our application,the contrast between soil and root data varies due to different growth stages and watering situations at the time of scanning.Additionally,the root system itself is expanding in length and in the diameter of individual roots.Objective.For semiautomated and robust root system segmentation from CTX data,we propose the RootForce approach,which is an extension of Frangi’s“multi-scale vesselness”method and integrates a 3D local variance.It allows a precise delineation of roots with diameters down to severalμm in pots with varying diameters.Additionally,RootForce is not limited to the segmentation of small below-ground organs,but is also able to handle storage roots with a diameter larger than 40 voxels.Results.Using CTX volume data of full-grown bean plants as well as time-resolved(3D+time)growth studies of cassava plants,RootForce produces similar(and much faster)results compared to manual segmentation of the regarded root architectures.Furthermore,RootForce enables the user to obtain traits not possible to be calculated before,such as total root volume(Vroot),total root length(Lroot),root volume over depth,root growth angles(θmin,θmean,andθmax),root surrounding soil density Dsoil,or form fraction F.Discussion.The proposed RootForce tool can provide a higher efficiency for the semiautomatic high-throughput assessment of the root architectures of different types of plants from large-scale CTX.Furthermore,for all datasets within a growth experiment,only a single set of parameters is needed.Thus,the proposed tool can be used for a wide range of growth experiments in the field of plant phenotyping.Stefan Gerth Joelle Claußen Anja Eggert Norbert Wörlein Michael Waininger Thomas Wittenberg Norman Uhlmann 2021Plant Phenomics2021,3,1:2
6Advances in Modeling and Simulation of Grinding Processes显示文摘E. Brinksmeier J.C. Aurich E. Govekar C. Heinzel H.-W. Hoffmeister F. Klocke J. Peters R. Rentsch D.J. Stephenson E. Uhlmann K. Weinert M. Wittmann 2006CIRP Annals - Manufacturing Technology2006,,2:2
7A new method for the nonlinear transformation of means and covariances in filters and estimators显示文摘Juiier S Uhlmann J Durrant-Whyte H F 2000IEEE Transactions on Automatic Control2000,45,3:1
8Unscented Filtering and Nonlinear Estimation 显示文摘Julier S J Uhlmann J K 2004Proceedings of the IEEE2004,92,3:1
9Unscented filtering and nonlinear estimation显示文摘Julier S J Uhlmann J K 2004Proc of the IEEE Aerospace and Electronic Systems2004,92,3:1
10A new method for the nonlinear transformation of means and covariances in filters and estimators显示文摘Simon J Julier Jeffrey K Uhlmann 2000IEEE Trans on AC2000,45,3:1
11显示文摘Uhlmann D R Suratwala T Davidson K 1997J Non-Cryst Solids1997,218,:1
12A New Method for the Nonlinear Transformation of Means and Covarianees in Filters and Estimators 显示文摘Julier S J Uhlmann J K 2000IEEE Trans on AC2000,45,3:1
13A new method for the nonlinear transformation of means and covariances in filters and estimators 显示文摘SIMON JULIER JEFFREY UHLMANN HUGH F DURRANT-WHYTE 2000IEEE Transactions on Automatic Control2000,45,3:1
14Unscented filtering and nonlinear estimation显示文摘Julier S J Uhlmann J K 2004Proceedings of the IEEE2004,92,3:1
15Biofeedback treatment patients with refractory epilepsy: changes in depression and control orientation 显示文摘Uhlmann C Froscher W 2001Seizure2001,10,1:1
16Unscented filtering and nonlinear estimation显示文摘Julier S J Uhlmann J K 2004Proceedings of the IEEE2004,92,3:1
17Unscented Filtering and Nonlinear Estimation显示文摘Simon J J Uhlmann J K 2004Proceedings of the IEEE2004,92,3:1
18A new approach for the nonlinear transformation of means and covariances in filters and estimators显示文摘JULIER S J UHLMANN J K DURRANT-WHYTE H F 2000IEEE Transactions on Automatic Control2000,45,3:1
19A new app roach for the nonlinear transformat ion of means and covariances in filters and estimators显示文摘JULIER S J UHLMANN J K DURRANT-WIfYTE H F 2000IEEE Trans o11 Automatic Control2000,45,3:1
20Unscented filtering and non- linear estimation显示文摘Julier S J Uhlmann J K 2004Proceedings of the IEEE2004,92,3:1
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