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arXiv 2023年

作者： Yang, Bo Yoshioka, Nobuyuki Harada, Hiroyuki Hakkaku, Shigeo Tokunaga, Yuuki Hakoshima, Hideaki Yamamoto, Kaoru Endo, Suguru LIP6 Sorbonne Université 4 Place Jussieu Paris75005 France Graduate School of Information Science and Technology The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan Department of Applied Physics School of Engineering University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan Wako-shi Saitama351-0198 Japan JST PRESTO 4-1-8 Honcho Kawaguchi Saitama332-0012 Japan Department of Applied Physics and Physico-Informatics Keio University Hiyoshi 3-14-1 Kohoku Yokohama223-8522 Japan NTT Computer and Data Science Laboratories NTT Corporation 3-9-11 Midori-cho Musashino-shi Tokyo180-8585 Japan Center for Quantum Information and Quantum Biology Osaka University 1-3 Machikaneyama Toyonaka Osaka560-8531 Japan

There are considerable obstacles against realizing practical quantum computing: a significant amount of computation errors and the restricted qubit count. As a unified method of noise-agnostic quantum error mitigation (QEM) methods, i.e., the quantum subspace expansion and virtual purification, a generalized quantum subspace expansion (GSE) has recently been proposed that is significantly robust against stochastic and coherent errors. However, GSE requires entangled measurements between copies of the quantum states, which is a significant drawback under the current situation of the restricted number of qubits and their connectivity. In this work, we propose a resource-efficient implementation of GSE, which we name "Dual-GSE", circumventing significant overheads of state copies by constructing an ansatz of error-mitigated quantum states via dual-state purification. Remarkably, Dual-GSE can further simulate larger quantum systems beyond the size of available quantum hardware with a suitable ansatz construction inspired by divide-and-conquer methods that forge entanglement classically. This also significantly reduces the measurement overhead because we only need to measure subsystems’ Pauli operators. The proposed method is demonstrated by a numerical simulation of the eight-qubit transverse-field Ising model, showing that our method estimates the ground state energy with high precision under gate noise with low mitigation overhead and practical sampling cost. Copyright © 2023, The Authors. All rights reserved.

关键词： Ground state

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The Impact of the COVID-19 Pandemic in Indonesia (Face to face versus Online Learning)

The Impact of the COVID-19 Pandemic in Indonesia (Face to fa...

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Vocational Education and Electrical Engineering, International Conference on

作者： Dina Fitria Murad Rosilah Hassan Yaya Heryadi Bambang Dwi Wijanarko Titan BINUS Online Learning Bina Nusantara University Jakarta Indonesia Center for Cyber Security Faculty of Information Science & Technology Universiti Kebangsaan Malaysia UKM Bangi Selangor Malaysia BINUS Graduate Program-Doctor of Computer Science Bina Nusantara University Jakarta Indonesia

ISBN: (数字)9781728174341

ISBN: (纸本)9781728174358

Covid-19 pandemic is an international disaster that is experienced by almost all countries in the world. This has an impact on all lines of the life of each country. Among them is the education sector. Aside from efforts to solve this co-19 problem, the state must continue to maintain the stability and sustainability of the learning process that is the right of all citizens. Indonesia experienced the same thing. face to face learning “shock” and immediately take the fastest action by utilizing existing technology, but not all of them are ready. Using survey methods and adopting the theories of Delon and McLean, this study aims to determine the readiness of organizers, lectures, and students for current conditions, their readiness in undergoing the learning process while maintaining the quality of education and user satisfaction (instructors and students) towards learning. The results of this study prove that we all tend to be unprepared but strangely, on the other hand, the fact is that the positive things from this pandemic prove that education practitioners in Indonesia are better prepared by online learning because they are more comfortable and satisfied with online learning while supported by the government and a good system (96% of respondents) compared to face to face (4% of respondents).

关键词： COVID-19 Pandemics Education Media Tools Sustainable development Faces

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2-input/3-input all-optical switchable and/NOR logic gate

2-input/3-input all-optical switchable and/NOR logic gate

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Integrated Photonics Research, Silicon and Nanophotonics, IPRSN 2019

作者： Nabeyama, Akira Komatsu, Kosuke Hosoya, Gou Yashima, Hiroyuki Department of Management Science Faculty of Engineering Tokyo University of Science 6-3-1 Niijuku Katsushika-ku Tokyo125-8585 Japan Department of Management Science Graduate School of Engineering Graduate School of Tokyo University of Science 6-3-1 Niijuku Katsushika-ku Tokyo125-8585 Japan Department of Information and Computer Technology Faculty of Engineering Tokyo University of Science 6-3-1 Niijuku Katsushika-ku Tokyo125-8585 Japan

We propose a 2-input/3-input all-optical switchable AND/NOR logic gate. We perform a simulation to confirm that the output signal quality does not depend on the logical operators and the number of inputs. © 2019 ... 详细信息

ISBN: (纸本)9781943580644

关键词： Logic gates

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Object detection based approach for Automatic detection of Pneumonia

Object detection based approach for Automatic detection of P...

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International Conference on Advances in Big Data, Computing and Data Communication Systems (icABCD)

作者： Anand Nayyar Rachna Jain Yash Upadhyay Graduate School Faculty of Information Technology Duy Tan University Da Nang Viet Nam Computer Science and Engineering Bharati Vidyapeeth's College of Engineering New Delhi India

ISBN: (数字)9781728167701

ISBN: (纸本)9781728167718

Pneumonia is a bacterial, viral, or fungal infection that causes swelling of the tissues in one or both lungs. Diagnosis for pneumonia requires an expert to find anomalies in the X-ray images, as it is a widespread disease, and it is not always possible for doctors to review all the cases. Most of the caused deaths are due to late diagnosis or some human error, which leads to an incorrect diagnosis of the disease. In this paper, we propose a novel approach to make an automated diagnosis and identify infected regions in the lungs. The proposed method uses a Mask RCNN object detector, which can identify anomalies in the lungs and also detect whether that anomaly is a pneumonia infection or is some other type of lung disease. The experimental results state that our proposed method gets an IoU score of 0.155, which is about 9% improvement other methods, i.e., YOLOv3, UNet, and Resnet used for Pneumonia infected tissue identification.

关键词： Lung Diseases Training Solid modeling Machine learning Object detection X-ray imaging

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A TORA-based Wireless Protocol for MANET with Low Routing Overhead at Link Layer

A TORA-based Wireless Protocol for MANET with Low Routing Ov...

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IEEE Internatonal Conference on Mobile Adhoc and Sensor Systems (MASS)

作者： Biao Han Li Ding Yusheng Ji Xiaoyan Wang Baosheng Wang School of Computer National University of Defense Technology Changsha China Information Systems Architecture Research Division National Institute of Informatics Tokyo Japan Graduate School of Science and Engineering Ibaraki University Ibaraki Japan

ISBN: (数字)9781728198668

ISBN: (纸本)9781728198675

Mobile Ad hoc Network (MANET) is an emerging technology that allows users to transmit data without any physical infrastructure. Among those MANET protocols, Temporally Ordered Routing Algorithm (TORA) is an on-demand MANET routing protocol that attempts to find routes according to the directed acyclic graph (DAG). However, the TORA protocol requires strict synchronization. The routing overhead of TORA will increase linearly with the packet transmission rate. Motivated by Apple Wireless Direct Link (AWDL), we propose an ad hoc link-layer protocol called TORA-based Wireless Protocol (TWP) in this article. TWP can be deployed on embedded devices with Linux-kernel systems. Besides, it has unique frame structures and mechanisms. Also, it can implement synchronization and a TORA-like routing function at the link layer. We analyze the performance of TWP via experiments on Raspberry Pis. The results show that TWP can perform routing and data transmission successfully. It performs well in synchronization and can effectively reduce the routing overhead during the process of network routing.

关键词： Wireless communication Performance evaluation Wireless sensor networks Routing Routing protocols Synchronization Mobile ad hoc networks

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Reconfiguration of spanning trees with many or few leaves 28

Reconfiguration of spanning trees with many or few leaves

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28th Annual European Symposium on Algorithms, ESA 2020

作者： Bousquet, Nicolas Ito, Takehiro Kobayashi, Yusuke Mizuta, Haruka Ouvrard, Paul Suzuki, Akira Wasa, Kunihiro CNRS LIRIS Université de Lyon Université Claude Bernard Lyon 1 France Graduate School of Information Sciences Tohoku University Japan Research Institute for Mathematical Sciences Kyoto University Japan Univ. Bordeaux Bordeaux INP CNRS LaBRI TalenceUMR5800 France Department of Computer Science and Engineering Toyohashi University of Technology Japan

ISBN: (纸本)9783959771627

Let G be a graph and T1,T2 be two spanning trees of G. We say that T1 can be transformed into T2 via an edge flip if there exist two edges e ∈ T1 and f in T2 such that T2 = (T1 \e)∪f. Since spanning trees form a matroid, one can indeed transform a spanning tree into any other via a sequence of edge flips, as observed in [11]. We investigate the problem of determining, given two spanning trees T1,T2 with an additional property Π, if there exists an edge flip transformation from T1 to T2 keeping property Π all along. First we show that determining if there exists a transformation from T1 to T2 such that all the trees of the sequence have at most k (for any fixed k ≥ 3) leaves is PSPACE-complete. We then prove that determining if there exists a transformation from T1 to T2 such that all the trees of the sequence have at least k leaves (where k is part of the input) is PSPACE-complete even restricted to split, bipartite or planar graphs. We complete this result by showing that the problem becomes polynomial for cographs, interval graphs and when k = n-2. © Nicolas Bousquet, Takehiro Ito, Yusuke Kobayashi, Haruka Mizuta, Paul Ouvrard, Akira Suzuki, and Kunihiro Wasa

关键词： Polynomial approximation

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Exponential acceleration of macroscopic quantum tunneling in a Floquet Ising model

arXiv

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arXiv 2023年

作者： Grattan, George Barton, Brandon A. Feeney, Sean Mossi, Gianni Patnaik, Pratik Sagal, Jacob C. Carr, Lincoln D. Oganesyan, Vadim Kapit, Eliot Quantum Engineering Program Colorado School of Mines 1523 Illinois St CO Golden80401 United States Department of Computer Science Colorado School of Mines 1500 Illinois St CO Golden80401 United States Department of Applied Mathematics and Statistics Colorado School of Mines 1500 Illinois St CO Golden80401 United States Department of Physics Colorado School of Mines 1523 Illinois St CO Golden80401 United States KBR Inc. 601 Jefferson St. HoustonTX77002 United States NASA Ames Research Center Moffett FieldCA94035 United States Department of Physics and Astronomy College of Staten Island CUNY Staten IslandNY10314 United States Physics program and Initiative for the Theoretical Sciences The Graduate Center CUNY New YorkNY10016 United States Center for Computational Quantum Physics Flatiron Institute 162 5th Avenue New YorkNY10010 United States

The exponential suppression of macroscopic quantum tunneling (MQT) in the number of elements to be reconfigured is an essential element of broken symmetry phases. Slow MQT is also a core bottleneck in quantum algorithms, such as traversing an energy landscape in optimization, and adiabatic state preparation more generally. In this work, we demonstrate the possibility to accelerate MQT through Floquet engineering with the application of a uniform, high frequency transverse drive field. Using the ferromagnetic phase of the transverse field Ising model in one and two dimensions as a prototypical example, we identify three qualitatively distinct regimes as a function of drive strength: (i) for weak drive, the system exhibits exponentially slow MQT alongside robust magnetic order, as expected;(ii) at intermediate drive strength, we find polynomial decay of rates alongside vanishing magnetic order consistent with critical or paramagnetic state;(iii) at very strong drive strengths both the tunnelling rate and time-averaged magnetic order remain finite with increasing system size. We support these claims with extensive full wavefunction and matrix-product state numerical simulations, and theoretical analysis. An experimental test of these results presents a technologically important and novel scientific question accessible on NISQ-era quantum computers. © 2023, CC BY.

关键词： Ising model

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Passive Sole Constraining Method to Stabilize 3D Passive Dynamic Walking 2019

Passive Sole Constraining Method to Stabilize 3D Passive Dyn...

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Proceedings of the 2019 2nd International Conference on Control and Robot technology

作者： Naoto Mizoguchi Kazuyuki Hyodo Sadayoshi Mikami Graduate School of Systems Information Science Future University Hakodate Hakodate Hokkaido Japan Department of Computer Science and Engineering Fukuoka Institute of Technology Fukuoka Japan Department of Complex and Intelligent Systems Future University Hakodate Hakodate Hokkaido Japan

ISBN: (纸本)9781450372527

Inspired by the function of a toe and a lateral arch of a human foot, we propose a method to stabilize the biped walk by attaching unactuated toes and lateral arches. The toes and lateral arches work as adaptive braking of sagittal and lateral directions. They touch on the ground at the angle where the biped exceedingly inclines. After touching on the floor, the center of rotation changes at the landing positions. This change causes the reduction of the exceeding angular velocities toward sagittal and lateral directions. By setting appropriate heights of the toe and lateral arch during the swing phase, the walking robot is expected to be stabilized. To analyze the effects of the toe, we derived equations of motions and the state transition functions for a simplified 3D passive dynamic walker with toes. We clarified the potential stabilizing effect of the method from numerical simulations and preliminary experiments by a real-world biped with toes. Note that the proper setting of heights and the verification of the effect of lateral arches are on the way.

关键词： passive dynamic walk foot walk biped toe stability equations of motion

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JASMINE image simulator for high-precision astrometry and photometry

arXiv

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arXiv 2024年

作者： Kamizuka, Takafumi Kawahara, Hajime Ohsawa, Ryou Kataza, Hirokazu Kawata, Daisuke Yamada, Yoshiyuki Hirano, Teruyuki Miyakawa, Kohei Aizawa, Masataka Omiya, Masashi Yano, Taihei Kano, Ryouhei Wada, Takehiko Löffler, Wolfgang Biermann, Michael Ramos, Pau Isobe, Naoki Usui, Fumihiko Hattori, Kohei Yoshioka, Satoshi Tatekawa, Takayuki Izumiura, Hideyuki Fukui, Akihiko Miyoshi, Makoto Tatsumi, Daisuke Gouda, Naoteru Institute of Astronomy Graduate School of Science The University of Tokyo 2-21-1 Osawa Tokyo Mitaka181-0015 Japan Institute of Space and Astronautical Science Japan Aerospace Exploration Agency 3-1-1 Yoshinodai Chuo-ku Kanagawa Sagamihara252-5210 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Tokyo Mitaka181-8588 Japan Mullard Space Science Laboratory University College London Holmbury St. Mary Surrey DorkingRH5 6NT United Kingdom Department of Physics Kyoto University Kitashirakawa-oiwake-cho Sakyo-ku Kyoto606-8502 Japan Astrobiology Center 2-21-1 Osawa Tokyo Mitaka181-8588 Japan Tsung-Dao Lee Institute Shanghai Jiao Tong University Shengrong Road 520 Shanghai201210 China Astronomisches Rechen-Institut Zentrum für Astronomie Der Universität Heidelberg Mönchhofstr. 12-14 Heidelberg69120 Germany The Institute of Statistical Mathematics 10-3 Midori-cho Tokyo Tachikawa190-8562 Japan Department of Marine Electronics and Mechanical Engineering Tokyo University of Marine Science and Technology 4-5-7 Konan Minato-ku Tokyo108-8477 Japan Kochi College 200-1 Monobe Kochi Nankoku783-8508 Japan Waseda Research Institute for Science and Engineering Waseda University 1-104 Totsukamachi Shinjuku-ku Tokyo169-8050 Japan Subaru Telescope Okayama Branch National Astronomical Observatory of Japan 3037-5 Honjo Kamogata Okayama Asakuchi719-0232 Japan Astronomical Science Program The Graduate University for Advanced Studies SOKENDAI 2-21-1 Osawa Tokyo Mitaka181-8588 Japan

JASMINE is a Japanese planned space mission that aims to reveal the formation history of our Galaxy and discover habitable exoEarths. For these objectives, the JASMINE satellite performs high-precision astrometric observations of the Galactic bulge and high-precision transit monitoring of M-dwarfs in the near-infrared (1.0—1.6 µm in wavelength). For feasibility studies, we develop an image simulation software named JASMINE-imagesim, which produces realistic observation images. This software takes into account various factors such as the optical point spread function (PSF), telescope jitter caused by the satellite’s attitude control error (ACE), detector flat patterns, exposure timing differences between detector pixels, and various noise factors. As an example, we report a simulation for the feasibility study of astrometric observations using JASMINE-imagesim. The simulation confirms that the required position measurement accuracy of 4 milliarcseconds for a single exposure of 12.5-mag objects is achievable if the telescope pointing jitter uniformly dilutes the PSF across all stars in the field of view. On the other hand, the simulation also demonstrates that the combination of realistic pointing jitter and exposure timing differences in the detector can significantly degrade accuracy and prevent achieving the requirement. This means that certain countermeasures against this issue must be developed. This result implies that this kind of simulation is important for mission planning and advanced developments to realize more realistic simulations help us to identify critical issues and also devise effective solutions. © 2024, CC BY.

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Correction: Advancements in additive manufacturing for video laryngoscopes: a comprehensive scoping and technological review

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Systematic reviews 2024年第1期13卷 31页

作者： Ana Cristina Beitia Kraemer Moraes Chiara das Dores do Nascimento Everton Granemann Souza Mauricio Beitia Kraemer Mauricio Moraes Neftali Lenin Villarreal Carreno Evandro Piva Rafael Guerra Lund Pelotas Dental School Graduate Program in Dentistry Federal University of Pelotas Pelotas RS 96010‑560 Brazil. Master's Degree in Electronic and Computer Engineering Center for Social and Technological Sciences Catholic University of Pelotas Pelotas RS 96015‑560 Brazil. Faculty of Medicine São Francisco University Bragança Paulista SP 12916‑900 Brazil. Faculty of Medicine Federal University of Pelotas Pelotas RS 96010‑560 Brazil. Graduate Program in Materials Science and Engineering Technological Development Center Federal University of Pelotas Pelotas RS 96010‑610 Brazil. Pelotas Dental School Graduate Program in Dentistry Federal University of Pelotas Pelotas RS 96010‑560 Brazil. rafael.lund@***. Graduate Program in Materials Science and Engineering Technological Development Center Federal University of Pelotas Pelotas RS 96010‑610 Brazil. rafael.lund@***.

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