이온유 교수

PURPOSE: To investigate the application of a metasurface-inspired wireless coil and evaluate its performance in clinical knee MRI. METHODS: A metasurface surface coil is designed for knee MRI at 1.5T. The image SNR and uniformity are assessed using a water phantom. In vivo studies are performed on 10 healthy volunteers (age range, 24-30 y; three males) and two patients (ages 31 and 76 y; two males) with knee conditions. A commercial 4-channel flexible coil and a 12-channel knee coil are used for

这个工作瞄准为安装收获的压电的精力根据楼梯和适当的点的宽度变化在 U 类型楼梯发现行人走特征。在二种楼梯的行人的数字(一个人是有在宽度的 1.5 m 的楼梯，其它是有在宽度的 3 m 的楼梯)被由被划分成 30 厘米爠獥摩敵漠?的一个地区在楼梯上计算步的数字估计???猠来敲慧楴湯爠慯瑳湩?楴敭漠?′?猠来敲慧楴湯爠慯瑳湩?整灭牥瑡牵?景???桴?敳瑣潩?獩搠'糖锚摀邤?愠摮?湩牣慥敳?桔?敲潣浭湥敤?慶畬獥映牯?湡?氠敩眠瑩楨??污挠浯潰楳楴湯?敷敲挠慬楲楦摥戠?湥牥祧搭獩数獲???映？？

Taking into account the whole system structure and the component reliability estimation uncertainty, a system reliability estimation method based on probability and statistical theory for distributed monitoring systems is presented. The variance and confidence intervals of the system reliability estimation are obtained by expressing system reliability as a linear sum of products of higher order moments of component reliability estimates when the number of component or system survivals obeys bino

The word error probability of binary linear block codes is evaluated in Rayleigh fading channels with diversity reception for three decoding algorithms: error correction (EC), error/erasure correction (EEC), and maximum likelihood (ML) soft decoding algorithms. The performance advantage of EEC over EC in the required average SNR decreases as the number of diversity channels increases. The performance advantage of EEC over EC does not depend on the specific value of word error probability althoug

As a typical superplastic metallic material, Zn-Al eutectoid alloy has been well known, where fine-grained microstructure required for the occurrence of superplasticity is obtained by solution treatment, water-quenching and subsequent aging at an elevated temperature such as 200℃. Recently thermo-mechanically controlled process (TMCP), where hot rolling is conducted under temperature control, has also been reported to provide a fine-grained microstructure. As the critical cooling rate in this te

In this paper, we focus on the aggression of lane-changing of two-lane highway with a bus in real traffic condition. The fundamental diagrams (current-density) under different safety distance are presented. It is found that the aggression of lane-changing has an influence on the traffic flow and traffic states. We also find the times of lane-changing for different densities and it is clarified that the lane-changing behaviors happen frequently in the middle density.

这笔记以一致性提供最佳的摺过计划的一个理论理由。联合图案的集中的 L 2 差异价值的新更低的界限被获得，它能作为一个基准被使用寻找最佳的摺过计划。当更多的因素在起始的设计颠倒符号时，我们的数字结果证明这更低的界限比存在结果锋利。

Brain is the most complex organ of human beings. The complete understanding of human brains’ functions is an ongoing challenge for neuroscience. Although there are many techniques used for brain research, neuroscientists, physicists, and engineers are still exploring other access of research for applications. Terahertz(THz) spectroscopy and imaging may create such a space for brain research. THz spectroscopic technique, which is a novel medical imaging modality, attracts attention of biomedical

With recent attempts to improve quality and productivity, the prefabrication manufacturing system has been occupying an increasing share of the construction area. To minimize site work, material is more frequently being produced and partially assembled at a plant, and then installed at a site. For this reason, the production process is being divided and the materials are being delivered to the site after passing through multiple plants. With these changes in the production process, the materials

The mechanical balance process is the key process to eliminate the quadrature error and improve the performance of the cupped wave gyro.The conventional mechanical balance method for cupped wave gyro based on cup-wall trimming requires high control accuracy of trimming quantity,which increases the production cost and decreases the fabrication efficiency in large extent.However,it is hard to reach the high balance accuracy with the natural frequency split of mHz grade by using the conventional me