http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Keystroke dynamics-based user authentication by Japanese old poems
Takuya TSUJIMOTO,Yoshihiro KANEKO 대한전자공학회 2015 ITC-CSCC :International Technical Conference on Ci Vol.2015 No.6
Needless to say, computer systems should be more secure for our safe life and society nowadays. A keystroke dynamics-based user authentication is known as one of potentially valid biometrics. In our previous research, input text requiring about two hundred keystrokes provides less than 1% EER, Equal Error Rate, for fifty-one subjects. To improve data input situation, this paper deals with one third shorter texts. Those texts are Japanese old poems composed of 5-7-5-7-7 syllabaries. We have asked thirty-five subjects to type these poems requiring about sixty keystrokes each three times. By user authentication experiments, we have achieved around EER 4 to 7%.
Measurement of Dynamic Characteristics of an Inducer in Cavitating Conditions
Takuya Ashida,Keita Yamamoto,Koichi Yonezawa,Hironori Horiguchi,Yutaka Kawata,Yoshinobu Tsujimoto 한국유체기계학회 2017 International journal of fluid machinery and syste Vol.10 No.3
In liquid-propellant rockets, POGO instability can occur, in which a fluctuation of propellant supply to the engine, a thrust fluctuation, and a structural vibration are coupled. For the prediction of this instability, it is required to provide dynamic characteristics of the pump represented as the transfer matrix correlating the upstream and downstream pressure and flow rate fluctuations. In the present study, the flow rate fluctuation is evaluated from the fluctuation of pressure difference at the different locations assuming that the fluctuation is caused by the inertia of the flow rate fluctuation. The experiments were performed in some flow conditions, and it was shown that the tendencies of dynamic characteristics are related to excitation frequencies, cavitation numbers and flow rate coefficients.
Measurement of Dynamic Characteristics of an Inducer in Cavitating Conditions
Ashida, Takuya,Yamamoto, Keita,Yonezawa, Koichi,Horiguchi, Hironori,Kawata, Yutaka,Tsujimoto, Yoshinobu Korean Society for Fluid machinery 2017 International journal of fluid machinery and syste Vol.10 No.3
In liquid-propellant rockets, POGO instability can occur, in which a fluctuation of propellant supply to the engine, a thrust fluctuation, and a structural vibration are coupled. For the prediction of this instability, it is required to provide dynamic characteristics of the pump represented as the transfer matrix correlating the upstream and downstream pressure and flow rate fluctuations. In the present study, the flow rate fluctuation is evaluated from the fluctuation of pressure difference at the different locations assuming that the fluctuation is caused by the inertia of the flow rate fluctuation. The experiments were performed in some flow conditions, and it was shown that the tendencies of dynamic characteristics are related to excitation frequencies, cavitation numbers and flow rate coefficients.