Lihan TONG Weijia LI Qingxia YANG Liyuan CHEN Peng CHEN
Yinan YANG
Myung-Hyun KIM Seungkwang LEE
Shuoyan LIU Chao LI Yuxin LIU Yanqiu WANG
Takumi INABA Takatsugu ONO Koji INOUE Satoshi KAWAKAMI
Martin LUKAC Saadat NURSULTAN Georgiy KRYLOV Oliver KESZOCZE Abilmansur RAKHMETTULAYEV Michitaka KAMEYAMA
Zheqing ZHANG Hao ZHOU Chuan LI Weiwei JIANG
Liu ZHANG Zilong WANG Yindong CHEN
Wenxia Bao An Lin Hua Huang Xianjun Yang Hemu Chen
Fengshan ZHAO Qin LIU Takeshi IKENAGA
Haruhiko KAIYA Shinpei OGATA Shinpei HAYASHI
Jiakai LI Jianyong DUAN Hao WANG Li HE Qing ZHANG
Yuxin HUANG Yuanlin YANG Enchang ZHU Yin LIANG Yantuan XIAN
Naohito MATSUMOTO Kazuhiro KURITA Masashi KIYOMI
Na XING Lu LI Ye ZHANG Shiyi YANG
Zhe Wang Zhe-Ming Lu Hao Luo Yang-Ming Zheng
Rina TAGAMI Hiroki KOBAYASHI Shuichi AKIZUKI Manabu HASHIMOTO
Tomohiro KOBAYASHI Tomomi MATSUI
Shin-ichi NAKANO
Hongzhi XU Binlian ZHANG
Weizhi WANG Lei XIA Zhuo ZHANG Xiankai MENG
Yuka KO Katsuhito SUDOH Sakriani SAKTI Satoshi NAKAMURA
Rinka KAWANO Masaki KAWAMURA
Zhishuo ZHANG Chengxiang TAN Xueyan ZHAO Min YANG
Peng WANG Guifen CHEN Zhiyao SUN
Zeyuan JU Zhipeng LIU Yu GAO Haotian LI Qianhang DU Kota YOSHIKAWA Shangce GAO
Ji WU Ruoxi YU Kazuteru NAMBA
Hao WANG Yao Ma Jianyong Duan Li HE Xin Li
Shijie WANG Xuejiao HU Sheng LIU Ming LI Yang LI Sidan DU
Arata KANEKO Htoo Htoo Sandi KYAW Kunihiro FUJIYOSHI Keiichi KANEKO
Qi LIU Bo WANG Shihan TAN Shurong ZOU Wenyi GE
HanYu Zhang Tomoji Kishi
Shinobu NAGAYAMA Tsutomu SASAO Jon T. BUTLER
Yoon Hak KIM
Takashi HIRAYAMA Rin SUZUKI Katsuhisa YAMANAKA Yasuaki NISHITANI
Yosuke IIJIMA Atsunori OKADA Yasushi YUMINAKA
Batnasan Luvaanjalba Elaine Yi-Ling Wu
KuanChao CHU Satoshi YAMAZAKI Hideki NAKAYAMA
Shenglei LI Haoran LUO Tengfei SHAO Reiko HISHIYAMA
Yasushi YUMINAKA Kazuharu NAKAJIMA Yosuke IIJIMA
Chunbo Liu Liyin Wang Zhikai Zhang Chunmiao Xiang Zhaojun Gu Zhi Wang Shuang Wang
Jia-ji JIANG Hai-bin WAN Hong-min SUN Tuan-fa QIN Zheng-qiang WANG
Yuhao LIU Zhenzhong CHU Lifei WEI
Ken ASANO Masanori NATSUI Takahiro HANYU
Shuto HASEGAWA Koichiro ENOMOTO Taeko MIZUTANI Yuri OKANO Takenori TANAKA Osamu SAKAI
Zhewei XU Mizuho IWAIHARA
Takao WAHO Akihisa KOYAMA Hitoshi HAYASHI
Taisei SAITO Kota ANDO Tetsuya ASAI
Shiyu YANG Tetsuya KANDA Daniel M. GERMAN Yoshiki HIGO
Tsutomu SASAO
Jiyeon LEE
Koichi MORIYAMA Akira OTSUKA
Hongliang FU Qianqian LI Huawei TAO Chunhua ZHU Yue XIE Ruxue GUO
Gao WANG Gaoli WANG Siwei SUN
Hua HUANG Yiwen SHAN Chuan LI Zhi WANG
Zhi LIU Heng WANG Yuan LI Hongyun LU Hongyuan JING Mengmeng ZHANG
Tomoyasu NAKANO Masataka GOTO
Hyebong CHOI Joel SHIN Jeongho KIM Samuel YOON Hyeonmin PARK Hyejin CHO Jiyoung JUNG
Xianglong LI Yuan LI Jieyuan ZHANG Xinhai XU Donghong LIU
Haoran LUO Tengfei SHAO Shenglei LI Reiko HISHIYAMA
Chang SUN Yitong LIU Hongwen YANG
Ji XI Yue XIE Pengxu JIANG Wei JIANG
Ming PAN
Some problems in formal language theory are considered and are shown to be deterministic exponential time complete. They include the problems for a given context-free grammar G, a nondeterministic finite automaton M, a deterministic pushdown automaton MD, of determining whether L(G)
Moritoshi YASUNAGA Hiroaki KITANO
The Memory-Based Reasoning (MBR) is one of the mainstay approaches in massively parallel artificial intelligence research. However, it has not been explored from the viewpoint of hardware implementation. This paper demonstrates high robustness of the MBR, which is suitable for hardware implementation using Wafer Scale Integration (WSI) technology, and proposes a design of WSI-MBR hardware. The robustness is evaluated by a newly developed WSI-MBR simulator in the English pronunciation reasoning task, generally known as MBRTalk. The results show that defects or other fluctuations of device parameters have only minor impacts on the performances of the WSI-MBR. Moreover, it is found that in order to get higher reasoning accuracy, the size of the MBR database is much more crucial than the computation resolution. These features are proved to be caused by the fact that MBR does not rely upon each single data unit but upon a bulk data set. Robustness in the other MBR tasks can be evaluated in the same manner as discussed in this paper. The proposed WSI-MBR processor takes advantage of benefits discovered in the simulation results. The most area-demanding circuits--that is, multipliers and adders--are designed by analog circuits. It is expected that the 1.7 million processors will be integrated onto the 8-inch silicon wafer by the 0.3 µm SRAM technology.
This paper describes a text-independent speaker recognition method using predictive neural networks. For text-independent speaker recognition, an ergodic model which allows transitions to any other state, including selftransitions, is adopted as the speaker model and one predictive neural network is assigned to each state. The proposed method was compared to quantization distortion based methods, HMM based methods, and a discriminative neural network based method through text-independent speaker identification experiments on 24 female speakers. The proposed method gave the highest identification rate of 100.0%, and the effectiveness of predictive neural networks for representing speaker individuality was clarified.
Hiroshi HAMADA Satoshi MIKI Ryohei NAKATSU
A new method is proposed for automatically evaluating the English pronunciation quality of non-native speakers. It is assumed that pronunciation can be rated using three criteria: the static characteristics of phonetic spectra, the dynamic structure of spectrum sequences, and the prosodic characteristics of utterances. The evaluation uses speech recognition techniques to compare the English words pronounced by a non-native speaker with those pronounced by a native speaker. Three evaluation measures are proposed to rate pronunciation quality. (1) The standard deviation of the mapping vectors, which map the codebook vectors of the non-native speaker onto the vector space of the native speaker, is used to evaluate the static phonetic spectra characteristics. (2) The spectral distance between words pronounced by the non-native speaker and those pronounced by the native speaker obtained by the DTW method is used to evaluate the dynamic characteristics of spectral sequences. (3) The differences in fundamental frequency and speech power between the pronunciation of the native and non-native speaker are used as the criteria for evaluating prosodic characteristics. Evaluation experiments are carried out using 441 words spoken by 10 Japanese speakers and 10 native speakers. One half of the 441 words was used to evaluate static phonetic spectra characteristics, and the other half was used to evaluate the dynamic characteristics of spectral sequences, as well as the prosodic characteristics. Based on the experimental results, the correlation between the evaluation scores and the scores determined by human judgement is found to be 0.90.
We consider an asymptotically sparsely encoded associative memory. Patterns are encoded by n-dimensional vectors of
Simone GARDELLA Ryoichi HASHIMOTO Tohru KUMAGAI Mitsuo WADA
A discrete-time neuron model having a refractory period and containing a binary hysteresis output function is introduced. A detailed mathematical analysis of the output response is carried out and the necessary and sufficient condition which a sequence must satisfy in order to be designated as a periodic response of the neuron model under a constant or periodic stimulation is given.
The properties of the Haar Transform (HT) are discussed based on the Wavelet Transform theory. A system with two channels at resolution 2-1 and 2-2 for detecting paroxysm-spike in human's EEG is presented according to the multiresolution properties of the HT. The system adopts a coarse-to-fine strategy. First, it performs the coarse recognition on the 2-2 channel for selecting the candidate of spike in terms of rather relaxed criterion. Then, if the candidate appears, the fine recognition on the 2-1 channel is carried out for detecting spike in terms of stricter criterion. Three features of spike are extracted by investigating its intrinsic properties based on the HT. In the case of having no knowledge of prior probability of the presence of spike, the Neyman-Pearson criteria is applied to determining thresholds on the basis of the probability distribution of background and spike obtained by the results of statistical analysis to minimize error probability. The HT coefficients at resolution 2-2 and 2-1 can be computed individually and the data are compressed with 4:1 and 2:1 respectively. A half wave is regarded as the basic recognition unit so as to be capable of detecting negative and positive spikes simultaneously. The system provides a means of pattern recognition for non-stationary signal including sharp variation points in the transform domain. It is specially suitable and efficient to recognize the transient wave with small probability of occurrence in non-stationary signal. The practical examples show the performance of the system.
This paper presents a new algorithm for finding the kth-shortest paths between a specified pair of vertices in a directed graph with arcs having non-negative costs.
An adaptive algorithm is presented for fuzzy clustering of data. Partitioning is fuzzified by addition of an entropy term to objective functions. The proposed method produces more convex membership functions than those given by the fuzzy c-means algorithm.