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浏览/检索结果: 共85条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Tourist management in national parks in the Czech-German borderland: Bohemian 'Switzerland' and Saxon 'Switzerland' 期刊论文  OAI收割 JOURNAL OF MOUNTAIN SCIENCE, 2020, 卷号: 17, 期号: 12, 页码: 2853-2879 作者:  Kolodziejczyk, Krzysztof   |  收藏  |  浏览/下载：13/0  |  提交时间：2023/02/17 National parks  Tourist management  Tourist trails  Bohemian ‘  Switzerland’  Saxon ‘  Switzerland’   Glacier mass variation and its effect on surface runoff in the Beida River catchment during 1957-2013 期刊论文  OAI收割 JOURNAL OF GLACIOLOGY, 2017, 卷号: 63, 期号: 239, 页码: 523-534 作者:  Wang, S (Wang, Sheng);  Yao, TD (Yao, Tandong);  Tian, LD (Tian, Lide);  Pu, JC (Pu, Jianchen);  Yao, TD   |  收藏  |  浏览/下载：25/0  |  提交时间：2018/07/09 SEA-LEVEL RISE  MOUNTAIN GLACIERS  TIBETAN PLATEAU  BALANCE MODEL  ICE CAPS  RADIATION  21ST-CENTURY  SWITZERLAND  SENSITIVITY  NORWAY   Application of a distributed degree-day model of glaciers in the upper reaches of the Beida River Basin 期刊论文  OAI收割 ENVIRONMENTAL EARTH SCIENCES, 2016, 卷号: 75, 期号: 6, 页码: 493 作者:  Wang, S (Wang, Sheng);  Wang, JF (Wang, Jinfeng);  Pu, JC (Pu, Jianchen);  Wang, S   |  收藏  |  浏览/下载：29/0  |  提交时间：2017/10/10 Sea-level Rise  Equilibrium-line Altitude  Surface-energy-balance  Mass-balance  Climate-change  Ice Caps  Sensitivity  Switzerland  Radiation  Darolla   A new genus of Rhinocerotidae (Mammalia, Perissodactyla) from the Oligocene of Europe 期刊论文  OAI收割 JOURNAL OF SYSTEMATIC PALAEONTOLOGY, 2013, 卷号: 11, 期号: 8, 页码: 947-972 作者:  Becker, Damien;  Antoine, Pierre-Olivier;  Maridet, Olivier 收藏  |  浏览/下载：26/0  |  提交时间：2014/12/12 Rhinocerotinae  Molassitherium delemontense gen  et sp  nov  cladistics  biostratigraphy  Jura Molasse  Switzerland   Synchrotron-based P K-edge XANES spectroscopy reveals rapid changes of phosphorus speciation in the topsoil of two glacier foreland chronosequences 期刊论文  OAI收割 GEOCHIMICA ET COSMOCHIMICA ACTA, 2013, 卷号: 108, 页码: 154-171 作者:  Prietzel, Joerg;  Duemig, Alexander;  Wu, Yanhong;  Zhou, Jun;  Klysubun, Wantana 收藏  |  浏览/下载：45/0  |  提交时间：2013/06/24 RAY-ABSORPTION SPECTROSCOPY  SOIL CHRONOSEQUENCE  DAMMA GLACIER  ORGANIC PHOSPHORUS  HAILUOGOU GLACIER  GONGGA MOUNTAIN  RAIN-FOREST  SWITZERLAND  LIMITATION  FRACTIONS   Application of interferometry measurement in large-scale optic-electrical theodolite (EI CONFERENCE) 会议论文  OAI收割 2012 International Conference on Sensors, Measurement and Intelligent Materials, ICSMIM 2012, December 26, 2012 - December 27, 2012, Guilin, China 作者:  Sun Z. 收藏  |  浏览/下载：39/0  |  提交时间：2013/03/25 Interferometry is a very important method in high accuracy measurement for optical system. This article briefly introduced the conception of interferometry and took a product of 4D Technology as an example to carry on the measurement. A large-scale optic-electrical Theodolite in assemblage was measured  and its primary mirror was 400mm in diameter. With the analysis of the results  some micro adjustments of the mechanical structure proceed  and it made the system perform better. The final results of the whole system is 1.061 in P-V value and 0.1136 in RMS value (=632.8nm)  this meets the demand of optical design and practical application. The result demonstrates that interferometry is a good way to be utilized and optimize in the procedure of assemble. (2013) Trans Tech Publications  Switzerland.   Reentry guidance based on parametric optimization (EI CONFERENCE) 会议论文  OAI收割 2012 International Conference on Mechatronics and Control Engineering, ICMCE 2012, November 29, 2012 - November 30, 2012, Guangzhou, China 作者:  Li D. 收藏  |  浏览/下载：161/0  |  提交时间：2013/03/25 This paper presents a parametric optimization approach to solve reentry guidance. Due to the various constraints imposed on the trajectory  original guidance problem can be converted into an optimal control problem with a merit function to be minimized. Direct implementation of method of variation and is too complex to get a reasonable result  while a numerical parametric optimization approach is feasible and efficient if we choose appropriate control variables as the optimization parameters and effective optimization algorithm. A simulation of the approach is performed to show its validity on reentry guidance problem: as the value of merit function converges to acceptable threshold  all constraints are hold. (2013) Trans Tech Publications  Switzerland.   Weighted data fusion algorithm in the application of visual measurement network system (EI CONFERENCE) 会议论文  OAI收割 2012 International Conference on Mechatronics and Control Engineering, ICMCE 2012, November 29, 2012 - November 30, 2012, Guangzhou, China 作者:  Zhang Y.-c.;  Zhou J. 收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25 For the problem on the deviation of actual measurement values between different network positions of visual measurement network system  so present the weighted data fusion algorithm. To distribute the weight coefficients according to the stability of eigenvector and fuse the coordinates  finally get the ultimate expression of fusion estimate. The experiment results present the maximum absolute tolerance of the fusion results is 0.039mm via the weighted data fusion algorithm  the maximum one via traditional data fusion algorithm of the center of point set is 0.056mm  Repeatedly measure 50 times  compared with the traditional algorithm  proposed weighted data fusion algorithm has much better precision and better stability. (2013) Trans Tech Publications  Switzerland.   Structural design of primary mirror subassembly for space telescope (EI CONFERENCE) 会议论文  OAI收割 2nd International Conference on Mechatronics and Applied Mechanics, ICMAM 2012, December 8, 2012 - December 9, 2012, Taiwan 作者:  Xu H. 收藏  |  浏览/下载：62/0  |  提交时间：2013/03/25 In order to design a large aperture primary mirror with the diameter of 1150 mm  the parameters impacting on gravity deformation of the mirror were analyzed and discussed in detail  including material selection  diameter-thickness ratio  the number of the support points  location selection and lightweight structure  etc. A novel space mirror structure system was put forward  and its back was opened and supported by six points on back. The dynamic and static and thermal characteristics were analyzed based on the finite element method. Analysis results showed the surface figure accuracy reached to RMS 14.5nm under the action of gravity load along the optical axis direction and the first-order natural frequency was 214Hz which met to the designed indexes requirements. (2013) Trans Tech Publications  Switzerland.   Engineering analysis and research on connection plate of vehicle radar antenna pedestal (EI CONFERENCE) 会议论文  OAI收割 3rd International Conference on Frontiers of Manufacturing and Design Science, ICFMD 2012, December 11, 2012 - December 13, 2012, Hong kong 作者:  Sun H.;  Sun H.;  Li Y.;  Li Y.;  Li Y. 收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25 According to the usage of vehicle radar antenna pedestal connection plate  this article analyzes and compares the structure characteristic of welding and casting. We decide to adopt the casting structure and use cast aluminium ZL101A. Based on the connection plate of using conditions  we analyze the deformation and stress of connection plate by the finite element analysis software. The design is in line with the material allowable requirements and to meet the requirements of the system stiffness. (2013) Trans Tech Publications  Switzerland.