Magnetic Micro Electro-mechanical Systems (Magnetic MEMS) provide transducer capabilities ranging from thin-film storage devices and micro sensors to micro actuator solutions. This paper provides an overview over magn...
Magnetic Micro Electro-mechanical Systems (Magnetic MEMS) provide transducer capabilities ranging from thin-film storage devices and micro sensors to micro actuator solutions. This paper provides an overview over magnetic thin-film devices developed at the Institute for Microtechnology at the Leibniz Universitaet Hannover`s Center for Production technology (PZH) in Garbsen, Germany. In the area of datastorage, it presents a microcoil for opticaldatastorage. In the field of micro sensors it shows two inductive length measurement systems, an eddy current proximity sensor and a micro strain gauge for force measurements. Micro actuators built as linear positioners and as tilting platforms, as well as a new actuator principle based on the magnetic shape memory (MSM) effect conclude the paper.
红树林生态系统地上生物量是碳储量评估和气候变化研究必需的基础数据之一,其估算方法是蓝碳研究的热点。遥感以其宏观、综合、动态、快速、可重复等特点,已成为红树林地上生物量估算的主要技术手段。本文综合国内外相关研究进展,分析了光学遥感、微波雷达、激光雷达(Light Detection and Ranging,LiDAR)数据源在红树林生物量估算的应用现状,以及多源遥感数据融合应用的优势;总结了基于遥感的统计模型、过程模型和间接法3种生物量估算方法的研究现状;从多源遥感数据的融合、发展机器学习算法和遥感过程模型、长时序分析,以及建立红树林地面调查数据集等角度对红树林生物量遥感估算进行展望。
Due to recent advances made in datastorage, cloud computing, and Blu-ray mastering technology, it is now straight forward to calculate, store, transfer, and print bitmapped holograms that use terabytes of data and te...
Due to recent advances made in datastorage, cloud computing, and Blu-ray mastering technology, it is now straight forward to calculate, store, transfer, and print bitmapped holograms that use terabytes of data and tera-pixels of information. This presentation reports on the potential of using the phase transition mastering (PTM) process to construct bitmapped, computer generated holograms with spatial resolutions of 5000 line-pairs/mm (70 nm pixel width). In particular, for Blu-ray disk production, Sony has developed a complete process that could be alternately deployed in holographic applications. The PTM process uses a 405 nm laser to write phase patterns onto a layer of imperfect transition metal oxides that is deposited onto an 8 inch silicon wafer. After the master hologram has been constructed, its imprint can then be cheaply mass produced with the same process as Blu-ray disks or embossed holograms. Unlike traditional binary holograms made with expensive e-beam lithography, the PTM process has the potential for multiple phase levels using inexpensive optics similar to consumer-grade desktop Blu-ray writers. This PTM process could revolutionise holography for entertainment, industrial, and scientific applications.
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