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8篇 您的检索式:作者名="CHRISTIAN BOHM"
    题名 作者 年代 出处 被引量
1Search in high-dimensional spaces-index structures for improving the performance of multimedia databases显示文摘Christian Bohm 2001ACM Computing Surveys2001,33,3:1
2Rote of integrin-linked kinase for functional capacity of endothelial progenitor ceils in palients with stable coronary artery disease显示文摘Christian Werner Michael Bohm Erik B 2008Biochem Biophysic Res Commun2008,377,:1
3Searching in high-dimensional spaces: Index structures for improving the performance of multimedia databases 显示文摘CHRISTIAN BOHM STEFAN BERCHTOLD DANIEL KEIM 2001ACM Computing Surveys2001,33,3:1
4Modeling and analysis of the ocean dynamic with Gaussian complex network显示文摘The techniques for oceanographic observation have made great progress in both space-time coverage and quality, which make the observation data present some characteristics of big data. We explore the essence of global ocean dynamic via constructing a complex network with regard to sea surface temperature. The global ocean is divided into discrete regions to represent the nodes of the network. To understand the ocean dynamic behavior, we introduce the Gaussian mixture models to describe the nodes as limit-cycle oscillators. The interacting dynamical oscillators form the complex network that simulates the ocean as a stochastic system. Gaussian probability matching is suggested to measure the behavior similarity of regions. Complex network statistical characteristics of the network are analyzed in terms of degree distribution, clustering coefficient and betweenness. Experimental results show a pronounced sensitivity of network characteristics to the climatic anomaly in the oceanic circulation. Particularly, the betweenness reveals the main pathways to transfer thermal energy of El Niño–Southern oscillation. Our works provide new insights into the physical processes of ocean dynamic, as well as climate changes and ocean anomalies.孙鑫 于勇波 杨玉婷 董军宇 Christian Bohm 陈学恩 2020Chinese Physics B2020,29,10:1
5Searching in highdimensional spaces index structures for improving the performance of multimedia databases显示文摘Christian Bohm Stefan Berchtold Daniel A Keim 2001ACM Computing Surveys (CSUR)2001,933,3:1
6Searching in high-dimensional spaces:index structures for improving the performance of multimedia databases显示文摘Bohm Christian Berchtold Stefan Keim Daniel 2001ACM Computing Surveys2001,33,3:1
7Highly efficient passive Tesla valves for microfluidic applications显示文摘A multistage optimization method is developed yielding Tesla valves that are efficient even at low flow rates,characteristic,e.g.,for almost all microfluidic systems,where passive valves have intrinsic advantages over active ones.We report on optimized structures that show a diodicity of up to 1.8 already at flow rates of 20μl s^(−1) corresponding to a Reynolds number of 36.Centerpiece of the design is a topological optimization based on the finite element method.It is set-up to yield easy-to-fabricate valve structures with a small footprint that can be directly used in microfluidic systems.Our numerical two-dimensional optimization takes into account the finite height of the channel approximately by means of a so-called shallow-channel approximation.Based on the threedimensionally extruded optimized designs,various test structures were fabricated using standard,widely available microsystem manufacturing techniques.The manufacturing process is described in detail since it can be used for the production of similar cost-effective microfluidic systems.For the experimentally fabricated chips,the efficiency of the different valve designs,i.e.,the diodicity defined as the ratio of the measured pressure drops in backward and forward flow directions,respectively,is measured and compared to theoretical predictions obtained from full 3D calculations of the Tesla valves.Good agreement is found.In addition to the direct measurement of the diodicities,the flow profiles in the fabricated test structures are determined using a two-dimensional microscopic particle image velocimetry(μPIV)method.Again,a reasonable good agreement of the measured flow profiles with simulated predictions is observed.Sebastian Bohm Hai Binh Phi Ayaka Moriyama Erich Runge Steffen Strehle Jörg König Christian Cierpka Lars Dittrich 2022Microsystems & Nanoengineering2022,8,5:0
8SIMETAL COREX^(■)——current status and development显示文摘The paper will give an overview about the COREX? plants in operation,show the new developments and findings for the COREX? process i.e.areal gas distribution and coal briquetting and the status of the FINEX? technology will be given.Christian BOHM Wolfgang GRILL Hado HECKMANN 2010Baosteel Technical Research2010,4,S1:0
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