http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
STM investigation of porphyrin isomers on metal substrates
T. Terui,T. Kamikado,Y. Okuno,H. Suzuki,S. Mashiko 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
We performed scanning tunneling microscopy (STM) experiments on mono- or sub-monolayer deposited porphyrin moleculeson metal substrates. We observed substitution-dependent structure changes of the molecules. Obtaining STM images of thestructure and arrangement of functional molecules would contribute valuable information towards creation of nano-molecular-devices. scanning probe microscopy (SPM) shows the greatest potential for reaching this goal, at present. STM is able to obtainimages with nano-meter resolution of molecules on metal surfaces. These high-resolution images reveal the molecular structure andarrangement of the molecules on the surface and contain information about the moleculesubstrate interaction and the moleculemolecule interaction. STM will be useful for the assembly of nano-devices made from molecules on a substrate.
Defending and Detecting Audio Adversarial Example using Frame Offsets
( Yongkang Gong ),( Diqun Yan ),( Terui Mao ),( Donghua Wang ),( Rangding Wang ) 한국인터넷정보학회 2021 KSII Transactions on Internet and Information Syst Vol.15 No.4
Machine learning models are vulnerable to adversarial examples generated by adding a deliberately designed perturbation to a benign sample. Particularly, for automatic speech recognition (ASR) system, a benign audio which sounds normal could be decoded as a harmful command due to potential adversarial attacks. In this paper, we focus on the countermeasures against audio adversarial examples. By analyzing the characteristics of ASR systems, we find that frame offsets with silence clip appended at the beginning of an audio can degenerate adversarial perturbations to normal noise. For various scenarios, we exploit frame offsets by different strategies such as defending, detecting and hybrid strategy. Compared with the previous methods, our proposed method can defense audio adversarial example in a simpler, more generic and efficient way. Evaluated on three state-of-the-arts adversarial attacks against different ASR systems respectively, the experimental results demonstrate that the proposed method can effectively improve the robustness of ASR systems.
Establishment of Laser Sintering Technique for Titanium Powder
Miura Hideshi,Takemasu Teruie,Uemura Makoto,Otsu Masaaki 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
This paper investigates the characteristic of single-layered and multi-layered compacts made by selective laser sintering using titanium powder (TILOP45 and TILOP150, Sumitomo Titanium Corp.) There were few defects in smooth surface of laser sintered specimen in vacuum as compared to the laser sintered specimen in argon. Maximum tensile strength of singlelayered compact was about 200MPa. Multi-layered compacts show the density of around 75% and the adhesive bonding was not observed between layers, resulted in 70MPa of maximum bending strength and 50MPa of maximum tensile strength.
Tomoaki Okuda,Daiki Shishido,Yoshihiro Terui,Kentaro Fujioka,Ryoma Isobe,Yusuke Iwaki,Koji Funato,Kozo Inoue 한국대기환경학회 2018 Asian Journal of Atmospheric Environment (AJAE) Vol.12 No.1
Filter-based sampling techniques are the conventional way to collect particulate matter, but particles collected and entangled in the filter fibers are difficult to be removed and thus not suited for the following cell- and animal-based exposure experiments. Collecting aerosol particles in powder form using a cyclone instead of a filter would be a possible way to solve this problem. We developed a hybrid virtual-impactor/cyclone high-volume fine and coarse particle sampler and assessed its performance. The developed system achieved 50% collection efficiency with components having the following aerodynamic cut-off diameters: virtual impactor, 2.4 μm; fine-particle cyclone, 0.18-0.30 μm; and coarse-particle cyclone, 0.7 μm. The virtual impactor used in our set-up had good PM2.5 separation performance, comparable to that reported for a conventional real impactor. The newly developed sampler can collect fine and coarse particles simultaneously, in combination with exposure testing with collected fine- and coarse- particulate matter samples, should help researchers to elucidate the mechanism by which airborne particles result in adverse health effect in detail.