Exact analysis of class DE amplifier with FM and PWM control Hiroo Sekiya, Shinsaku Mori, and Iwao Sasase IEICE Trans. on Coomunications, vol.E86-B, no.10, pp.3082-3093, Oct. 2003. [Abstract | pdf] Design of generalized class E^2 dc/dc converter Hiroo Sekiya, Jianming Lu, and Takashi Yahagi International Journal of Circuit Theory and Applications, vol.31, no.3, pp.229-248, Aug. 2003. [Abstract | pdf] Noise Removal for Degraded Images with Impulse Noise Using Median Filters and Neural Filters (in Japanese) Noritaka Yamashita, Jianming Lu, Hiroo Sekiya, Takashi Yahagi IEEJ Transactions on Electronics, Infomation and Systems, vol.123, no.6, pp.1072-1079, June 2003. [Abstract | pdf]

A new algorithm for speeding up overcomplete blind source separation Xiaowei Zhang, Jianming Lu, Nuo Zhang, Hiroo Sekiya and Takashi Yahagi 2003 International Symposium on Intelligent Signal Processing and Communication System (ISPACS2003), pp.255-258, Dec. 2003. [Abstract | pdf] Pipelined successive interference cancellation with parallel processing for a DS/CDMA system Toshimichi Yokote, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi 5th Asia-Pacific Symposium on Information and Telecommunication Technologies(APSITT2003), pp.125-130, Nov. 2003. [Abstract | pdf] Class E inverter using thinned-out method Muzafar Bin Mohd Yusoff, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi International Telecommunications Energy Conference (INTELEC2003), pp.451-459, Oct. 2003. [Abstract | pdf] Phase control for resonant dc/dc converter with class DE inverter and class E rectifier Hiroo Sekiya, Shuichi Nemoto, Shuichi Nemoto, Jianming Lu, and Takashi Yahagi The 20th European Conference on Circuit Theory and Design (ECCTD2003), no.II, pp.121-124, Sept. 2003. [Abstract | pdf] Spectral subtraction based on speech/noise-dominant classification Yukihiro Nomura, Jianming Lu, Hiroo Sekiya, and Takashi Yahagi 2003 International Workshop on Acoustic Echo and Noise Control (IWAENC2003), pp.127-130, Sept. 2003. [Abstract | pdf] Design and analysis of class DE amplifier with any output Q, any duty ratio and switch on resistance Hiroo Sekiya, Satoki Oshikawa, Jianming Lu, and Takashi Yahagi 2003 IEEE International Symposium on Circuits and Systems (ISCAS2003), pp.III-280-283, May 2003. [Abstract | pdf] New partition-based filters for suppressing mixed high probability impulse and Gaussian noises in images Noritaka Yamashita, Hiroo Sekiya, Jianming LU, and Takashi Yahagi 2003 IEEE International Symposium on Circuits and Systems (ISCAS2003), pp.II-408-411, May 2003. [Abstract | pdf]

Phase control for resonant dc/dc converter with class DE inverter and class E rectifier (in Japanese) Shuichi Nemoto, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, vol.NLP2003-11, pp.1-6, June 2003. [Abstract | pdf] Pipelined successive interference cancellation with parallel processing for a DS/CDMA system (in Japanese) Toshimichi Yokote, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Wideband System, vol.103, no.138, pp.13-16, June 2003. [Abstract | pdf] Design of class DE amplifier with any output Q, any duty ratio and switch on resistance Satoki Oshikawa, Hiroo Sekiya, Jianming Lu, and Takashi Yahag 16th Workshop of Circuits and Systems at Karuizawa, pp.351-356, Apr. 2003. [Abstract | pdf] Partiton-based filters for suppressing mixed Gaussian and high probability impulse noises in images (in Japanese) Noritaka Yamashita, Jianming Lu, Hiroo Sekiya, and Takashi Yahagi The 16th Workshop on Circuits and Systems in Karuizawa, Apr. 2003. [Abstract | pdf] Design of class DE-E dc/dc converters with any output Q of the inverter, any duty ratio and switch on resistance (in Japanese) Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, pp.7-12, Feb. 2003. [Abstract | pdf]