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Study of inclusive baryon-antibaryon pair production of p or Λ in two-photon processes

Zeitschrift für Physik C: Particles and Fields 1995年第1期69卷 597-606页

作者： Uehara, S. Abe, K. Amako, K. Arai, Y. Arima, T. Asano, Y. Chiba, M. Chiba, Y. Daigo, M. Fukawa, M. Fukushima, Y. Haba, J. Hamasaki, H. Hanai, H. Hemmi, Y. Higuchi, M. Hinode, F. Hirose, T. Homma, Y. Hosoda, N. Ishihara, N. Iwata, Y. Kanzaki, J. Kikuchi, R. Kondo, T. Korhonen, T.T. Kurashige, H. Matsuda, E.K. Matsui, T. Miura, M. Miyake, K. Mori, S. Nagashima, Y. Nakagawa, Y. Nakamura, T. Nakano, I. Odaka, S. Ogawa, K. Ohama, T. Ohsugi, T. Ohyama, H. Okabe, K. Okamoto, A. Ono, A. Oyama, T. Pennanen, J. Sakamoto, H. Sakuda, M. Sato, M. Sato, N. Shioden, M. Shirai, J. Shirakata, M. Sumiyoshi, T. Takada, Y. Takasaki, F. Takita, M. Tamura, N. Tatsumi, D. Tobimatsu, K. Tsuboyama, T. Unno, Y. Watanabe, T. Watase, Y. Yabuki, F. Yamada, Y. Yamagata, T. Yonezawa, Y. Yoshida, H. Yusa, K. KEK National Laboratory for High Energy Physics Tsukuba 305 Oho 1-1 Japan Department of Physics Tohoku University Sendai 980 Aza-Aoba Aramaki Aoba-ku Japan Institute of Applied Physics University of Tsukuba Tsukuba 305 Tennoudai 1-1-1 Japan Department of Physics Tokyo Metropolitan University Hachioji 192-03 Minami-Ohsawa 1-1 Japan Yasuda Women's Junior College Hiroshima 731-01 Yasuhigashi 6-13-1 Asa-Minami-ku Japan Faculty of Economics Toyama University Toyama 930 3190 Gofuku Japan Department of Physics Osaka University Toyonaka 560 Machikaneyama 1-1 Japan Department of Physics Kyoto University Kyoto 606 Oiwake-cho Kita-Shirakawa Sakyo-ku Japan Department of Applied Physics Tohoku-Gakuin University Tagajo 985 Chuo 1-13-1 Japan School of Applied Medical Science Kobe University Kobe 654-01 Tomogaoka 7-10-2 Suma-ku Japan Department of Physics Hiroshima University Higashi-Hiroshima 724 Kagamiyama 1-3-1 Japan Research Institute for High Energy Physics Helsinki University Helsinki SF-00170 Siltavuorenpenger 20C Finland Department of Physics Okayama University Okayama 700 Tsushimanaka 3-1-1 Japan Division of Natural Sciences International Christian University Mitaka 181 Ohsawa 3-10-2 Japan Faculty of Engineering Miyazaki University Miyazaki 889-01 Gakuen-Kibanadai-Nishi 1-1 Japan Institute of Physics University of Tsukuba Tsukuba 305 Tennoudai 1-1-1 Japan Hiroshima National College of Maritime Technology Hiroshima-ken 725-02 Higashino-cho 4272-1 Japan Faculty of Cross-Cultural Studies Kobe University Kobe 657 Tsurukabuto 1-2-1 Nada-ku Japan Department of Electronic and Computer Engineering Ibaraki College of Technology Hitachinaka 312 Nakane Japan Center for Information Science Kogakuin University Tokyo 163-91 Nishi-Shinjuku 1-24-2 Shinjuku-ku Japan Department of Physics Kogakuin University Tokyo 192 Nakano-cho 2665-1 Hachioji Japan Tsukuba College of Technology Tsukuba 305 Kasuga 4-1 Japan Naruto Universi

Inclusive baryon-antibaryon pair production was studied in two-photon events which were collected at the e + e - collider TRISTAN, and correspond to an integrated luminosity of 303 pb-1. Correlations between a baryon ...

Inclusive baryon-antibaryon pair production was studied in two-photon events which were collected at the e⁺ e^- collider TRISTAN, and correspond to an integrated luminosity of 303 pb^-1. Correlations between a baryon and an antibaryon were studied for their flavors (p or Λ) and their momentum vectors. The experimental results were compared with the expectations from a jet-fragmentation Monte Carlo simulation. We have found that although the ratios of the cross sections of different baryon-flavor combinations are consistent with the Monte Carlo expectations, the cross section shows an excess over the Monte Carlo expectation in a low invariant-mass region of final-state particles at large angles, that indicates a significant contribution from higher-order QCD or non-perturbative effects. The experimental data show no narrow azimuthal-angle correlation, which is expected from a jet-fragmentation Monte Carlo. A search for exclusive Λ pair production has also been made. We have no candidates and have obtained the upper limit for the cross section. © 1996 Springer-Verlag.

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CLASSIFICATION OF LANDSAT REMOTE-SENSING IMAGES BY A FUZZY UNSUPERVISED CLUSTERING-ALGORITHM

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information scienceS-APPLICATIONS 1994年第2期1卷 97-116页

作者： SHIH, FY CHEN, GP Computer Vision Laboratory Department of Computer and Information Science New Jersey Institute of Technology Newark New Jersey 07102 USA

The classification of each pixel in a Landsat image to one of the land cover types by conventional clustering techniques is highly inappropriate due to the low resolution of Landsat images and the multiplicity of terrain. The concept of fuzzy logic provides a flexible solution to this problem. This paper presents a new two-pass unsupervised clustering algorithm incorporated the fuzzy theory. In the first pass the mean vectors of different land cover types representing their geographic attributes are derived. In the second pass the membership grade of a pixel belonging to different land cover types is computed based on the distance between its gray-value vector and the mean vector of each type. Experimental results show that the developed fuzzy clustering algorithm produces more reasonable phenomenon interpretation than the traditional hard partition techniques.

关键词： Image analysis

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FULLY PARALLEL THINNING WITH TOLERANCE TO BOUNDARY NOISE

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PATTERN RECOGNITION 1994年第12期27卷 1677-1695页

作者： SHIH, FY WONG, WT Computer Vision Laboratory Department of Computer and Information Science New Jersey Institute of Technology Newark NJ 07102 U.S.A.

A new fully parallel thinning algorithm is developed and evaluated in this paper to solve the noise spurs problem and preserve geometric properties efficiently. The algorithm not only prevents the excessive erosions but also lessens the creation of spurious end points for an image with boundary noise. When two input images are similar in shape but with boundary noise, our skeletons produced appear more consistent in topology as compared to those using other algorithms. Although a few additional neighbors other than 3 x 3 are considered in the deletability conditions, the smoothing procedure prior to thinning is avoided. The parallel thinning algorithm runs very fast and can be implemented in real time. Several English and Chinese characters and the difficult patterns often illustrated in the literature are also experimented to show the efficiency and consistency of our algorithm.

关键词： IMAGE PROCESSING THINNING PARALLEL ALGORITHM SKELETON PATTERN RECOGNITION

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Planning the optimal set of views using the max-min principle 3rd

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3rd European Conference on computer vision, ECCV 1994

作者： Maver, Jasna Leonardis, Aleš Solina, Franc Computer Vision Laboratory Faculty of Electrical Engineering and Computer Science University of Ljubljana Tržaška 25 Ljubljana61001 Slovenia

ISBN: (纸本)9783540579571

We present an approach to a typical task of active sensing, namely how to successively position the sensor in order to accomplish a given task. The approach is data driven since it is only the data that provides the information for planning the next views, and no a priori knowledge about the constituents of the scene is necessary. We applied our approach to the task of determining the 3-D coordinates of vertices of object silhouettes in the image under orthographic projection. © Springer-Verlag Berlin Heidelberg 1994.

关键词： computer vision

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Multiagent fault‐diagnosis expert system in power systems

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European Transactions on Electrical Power 1995年第5期5卷 341-347页

作者： Wang, J.P. Trécat, J. Dr. Jianping Wang is a doctor fellow in the Faculte Polytechnique de Mons in Belgium. His current research field is parallel processing applications in power systems. Dr. Wang obtained his BS degree from Southwest Jiaotong University in P.R. Chinain 1982. From 1982 to 1990 he was appointed as an assistant lecturer. lecturer and associate professor respectively in the electrical engineering department of Southwest Jiaotong University. He obtained his Ph.D in the FacultC Polytechnique de Mons in July of 1993. (BD Dolez 3 1 FPMS B-7000 Mons Belgium T +32-65/37 41 87 Fax +32-65/37 43 00) Professor J. Trécat is a director in the power system laboratory in the Faculty Polytechnique de Mons. He obtained his Ph.D in the University of Manchester Institute of Science and Technology(UM1ST) in U.K. in 1970. He has been working in the fields of power system automation artificial intelligence application and computer vision in the Facult6 Polytechnique de Mons since 1970. He is a senior member of IEEE and he has made much contribution both in electrical engineering education and research. (BD Dolez 3 I FPMS B-7000 Mons T +32-651374185. Fax +32-6513743 00)

In order to solve the speed problem and shallow reasoning problem met in current research in fault diagnosis expert system, this paper presents a model based parallel fault diagnosis expert system for energy management systems (EMS). The Petri net model, which corresponds to the relationship between power system components and their protection systems, has been used for the inference in fault diagnosis. A multiagent parallel processing expert system, which is based on five transputers in Sun workstation, has been built for fault diagnosis purposes. The test results show that this expert system is not only fast but also has better performances. Copyright © 1995 John Wiley & Sons, Ltd.

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A direct recovery of superquadric models range images using recover-and-select paradigm 3rd

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3rd European Conference on computer vision, ECCV 1994

作者： Leonardis, Aleš Solina, Franc Macerl, Alenka Computer Vision Laboratory Faculty of Electrical Engineering and Computer Science University of Ljubljana Tržiaška 25 Ljubljana61001 Slovenia Hermes-Soft d.o.o. Ljubljana Slovenia

ISBN: (纸本)9783540579564

We present a novel approach to reliable and efficient recovery of part-descriptions from range images. We show that a set of superquadric models can be directly recovered from unsegmented range data, as opposed to methods which attempt the recovery of volumetric models only after the data has been pre-segmented using extensive pre-processing. The approach is based on the recover-and-select paradigm which consists of two intertwined stages: model-recovery and model-selection. At the model-recovery stage a redundant set of superquadrics is initiated in the image and allowed to grow, which involves an iterative procedure combining data classification and parameter estimation. All the recovered models are passed to the model-selection procedure where only the models resulting in the simplest overall description are selected. © Springer-Verlag Berlin Heidelberg 1994.

关键词： Recovery

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A direct part-level segmentation of range images using volumetric models

A direct part-level segmentation of range images using volum...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： F. Solina A. Leonardis A. Macerl Computer Vision Laboratory Faculty of Electrical Engineering and Computer Science University of Ljubljana Ljubljana Slovenia

Volumetric part models play an important part in robotic applications such as grasping, path planning, object avoidance, and modeling kinematic chains. The authors present a novel method for reliable and efficient recovery of part-descriptions in terms of superquadric models from range images. In contrast to usual approaches which perform the recovery of volumetric models in several steps (from curves, surfaces to volumes), the authors show that a direct recovery is possible. This is achieved by combining two existing methods: recover-and-select paradigm and recovery of superquadric models. A redundant set of superquadratics is initiated in the image and only the recovered models resulting in the simplest overall description are selected. The author show the results on several real range images.< >

关键词： Image segmentation Kinematics Shape Grasping Manipulators Robot vision systems Robot sensing systems Legged locomotion Orbital robotics Robot control

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Requirements for a real-Time image processing language

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Annual Review in Automatic Programming 1994年第C期18卷 175-180页

作者： Laplante, P Marlowe, T Stoyenko, A Department of Mathematics and Computer Science Fairleigh Dickinson University Madison NJ 07940 United States also research faculty of the Real-Time Computing Laboratory (CIS NJIT) United States Department of Mathematics and Computer Science Seton Hall University South Orange NJ 07079 United States also research faculty of the Real-Time Computing Laboratory (CIS NJIT) United States Real-Time Computing Laboratory Department of Computer and Information Science New Jersey Institute of Technology Newark NJ 07102 United States

In this paper we discuss issues in real-time image processing, including applications, approaches and hardware. In particular, we discuss the failure of existing programming languages to support these considerations a... 详细信息

关键词： image processing multimedia programming languages real-time virtual reality

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Polynomial-time algorithms for computing characteristic strings 5th

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5th Annual Symposium on Combinatorial Pattern Matching, CPM 1994

作者： Ito, Minoru Shimizu, Kuniyasu Nakanishi, Michio Hashimoto, Akihiro Graduate School of Information Science Nara Institute of Science and Technology Ikoma Nara630-01 Japan Information Systems Engineering Laboratory TOSHIBA Corporation OmeTokyo198 Japan Department of Information and Computer Sciences Faculty of Engineering Science Osaka University Toyonaka Osaka560 Japan

ISBN: (纸本)9783540580942

The difference between two strings is the minimum number of editing steps (insertions, deletions, changes) that convert one string into the other. Let S be a finite set of strings, let T be a subset of S, and let 5 be a positive integer. A 5-characteristic string of T under S is a string that is a common substring of T and that has at least ~-differences from any substring of any string in S - T. In this paper, the following result is presented. It can be decided in O(||T||+l2 · |S-T|+1·δ·||S-T||) time whether or not there exists a 8-characteristic string of T under S, where I denotes the length of a shortest string in T, IS-TI the cardinality of S-T, and ||T|| the size of T. If such a string exits, then all the shortest 5-characteristic strings of T under S can also be obtained in that time. © Springer-Verlag Berlin Heidelberg 1994.

关键词： Pattern matching

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Subpixel edge estimation using geometrical edge models with noise miniaturization

Subpixel edge estimation using geometrical edge models with ...

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IEEE Southwest Symposium on Image Analysis and Interpretation

作者： D.C.D. Hung O.R. Mitchell Computer Vision Laboratory Department of Computer Information Science New Jersey Institute of Technology Newark NJ USA Department of Electrical Engineering University of Texas Arlington Arlington TX USA

The significant disadvantage for traditional contour representation is as the resolution is reduced the effort of undersampling is proportional enlarged. The goal of this study is to improve edge detection results, especially for those corner points in low resolution. This study describes a method, which is based on 4-connected pixel-wise linearization, for finding contours from low resolution video images. This allows a more accurate inspection and identification of objects from image data. In practice, geometrical models are used to manipulate this linearization. A method is employed for examining the corner points as well.< >

关键词： Solid modeling Image edge detection computer vision Image resolution Laboratories information science Pixel Inspection Object recognition Brightness

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