Special Section on Nonlinear Theory and Its Applications ======================================================== . FOREWORD ....................................................... 1267 Tetsuo NISHI PAPERS ====== . A Study of the Pendulum Equation with a Periodic Impulsive Force --Bifurcation and Control-- .............................. 1269 Tetsushi UETA, Hiroshi KAWAKAMI, and Ikuro MORITA . Bifurcations in a Coupled Rossler System ....................... 1276 Tetsuya YOSHINAGA, Hiroyuki KITAJIMA, and Hiroshi KAWAKAMI . Bifurcation of the Delay Lock Loop in Spread Spectrum Communication ....................................................... 1281 Jiro ISHIKAWA, Hisato FUJISAKA, and Chikara SATO . Experiments of Secure Communications Via Chaotic Synchronization of Phase-Locked Loops ............................................. 1286 Atsushi SATO and Tetsuro ENDO . Prediction of Chaotic Time Series with Noise ................... 1291 Tohru IKEGUCHI and Kazuyuki AIHARA . On the Number of Solutions of a Class of Nonlinear Equations Related to Neural Networks with Tapered Connections .................... 1299 Tetsuo NISHI and Norikazu TAKAHASHI . Analysis of Switching Dynamics with Competing Neural Networks .. 1306 Klaus-Robert MUNLLER, Jens KOHLMORGEN, and Klaus PAWELZIK . Rotation Invariant Detection of Moving and Standing Objects Using Analogic Cellular Neural Network Algorithms Based on Ring-Codes 1316 Csaba REKECZKY, Akio USHIDA, and TamaLs ROSKA . Constructive, Destructive and Simplified Learning Methods of Fuzzy Inference ...................................................... 1331 Hiromi MIYAJIMA, Kazuya KISHIDA, and Shinya FUKUMOTO . A Priori Estimation of Newton Type Homotopy Method for Calculating an Optimal Solution of Convex Optimization Problem ............. 1339 Mitsunori MAKINO LETTER ====== . Implementation of T-Model Neural-Based PCM Encoders Using MOS Charge-Mode Circuits ........................................... 1345 Zheng TANG, Hirofumi HEBISHIMA, Okihiko ISHIZUKA, and Koichi TANNO Regular Section =============== PAPERS ====== [Analog Signal Processing] . A Design of Switched-Current Auto-Tuning Filter and Its Analysis ....................................................... 1350 Yoshito OHUCHI, Takahiro INOUE, and Hiroaki FUJINO [Digital Signal Processing] . AFast Projection Algorithm for Adaptive Filtering .............. 1355 Masashi TANAKA, Yutaka KANEDA, Shoji MAKINO, and Junji KOJIMA . A Representation Method of the Convergence Characteristic of the LMS Algorithm Using Tap-Input Vectors .............................. 1362 Kiyoshi NISHIKAWA and Hitoshi KIYA . Synthesizing Eficient VLSI Array Processors from Iterative Algorithms by Excluding Pseudo-Dependences ..................... 1369 Yeong-Sheng CHEN, Sheng-De WANG, and Kuo-Chun SU [Neural Networks] . A Mathematical Solution to a Network Designing Problem ......... 1381 Yoshikane TAKAHASHI LETTERS ======= [Analog Signal Processing] . Simulation and Design of the LC Resonant Circuit Security Tags . 1412 Kiyoshi INUI, Masanobu KOMINAMI, and Hiroji KUSAKA [Digital Signal Processing] . Statistical Analysis of a Simple Constrained High-Order Yule-Walker Tone Frequency Estimator ....................................... 1415 Yegui XIAO and Yoshiaki TADOKORO [Systems and Control] . Linear Systems Analysis of Blood Clotting System ............... 1419 Hirohumi HIRAYAMA, Kiyono YOSHII, Hidetomo OJIMA, Norikazu KAWAI, Shintaro GOTOH,and Yuzo FUKUYAMA [Artificial Intelligence and Knowledge] . Improvement of Noise Tolerance in Fuzzy ART Using a Weighted Sum and a Fuzzy AND Operation .......................................... 1432 Chang Joo LEE, Sang Yun LEE, and Choong Woong LEE [Neural Networks] . Synchronization Phenomena in RC Oscillators Coupled by One Resistor ....................................................... 1435 Seiichiro MORO, Yoshifumi NISHIO, and Shinsaku MORI . ABSTRACTS (IEICE Trans., Vol.J78-A, No.10 in Japanese) ......... 1440