检索结果-内蒙古大学图书馆

22nd International Conference on Composite Materials, ICCM 2019

作者： Yamada, Kohei Yamamoto, Satoru Kanesaki, Manato Nishikawa, Masaaki Matsuda, Naoki Kawabe, Kazumasa Hojo, Masaki Industrial Technology Center of Fukui Prefecture 61-10 Kawaiwashizuka Fukui910-0102 Japan Department of System Engineering Faculty of Computer Science and Systems Engineering Okayama Prefectural University 111 Kuboki Soja Okayama719-1197 Japan Department of Mechanical Engineering and Science Kyoto University C3 Kyoto Daigaku-Katsura Nishikyo-ku Kyoto615-8540 Japan

In this study, impact tests and compressive after impact (CAI) tests of quasi-isotropic laminates, which had different ply thicknesses using thin-ply prepreg whose thickness was 0.02 mm, were conducted. The effects of ply thickness and impact energy on the damage modes in impact tests and CAI strength were investigated. Furthermore, a precise observation of failure by an impact load inside the laminates using X-ray computed tomography (X-ray CT) was carried out. Results confirmed that fiber breakages became a predominant damage mode by decreasing the ply thickness owing to constraining effect of neighbouring layers, while most of failures in thick-ply laminates were dominated by matrix damage such as matrix cracks and delamination. Moreover, when the ply thickness decreased, the decreasing rate of CAI strength became larger than that of thick-ply laminates owing to the accumulation of fiber breakage in thickness direction in the case of a high impact energy, while the CAI strength was improved when the impact energy was below 5 J/mm. © 2019 International Committee on Composite Materials. All rights reserved.

关键词： computerized tomography

来源：评论

学校读者我要写书评

暂无评论

A Study on 14 bit Digital Controlled Oscillator Using Switched Striped Inductor

A Study on 14 bit Digital Controlled Oscillator Using Switch...

引用

Asia-Pacific Conference on Microwave

作者： Mareshi Yagi Kiyotaka Komoku Takayuki Morishita Nobuyuki Itoh Graduate School of Computer Science and Systems Engineering Okayama Prefectural University 111 Kuboki Soja Japan Okayama Prefectural University 111 Kuboki Soja Japan

ISBN: (数字)9781728135175

ISBN: (纸本)9781728135182

Feasibility of a digital controlled oscillator (DCO) using a switched striped inductor has been examined. The existing DCO performs frequency control by a combination of a switched capacitor and a varactor, it is not fully digital controlled oscillator. Therefore, we focused on switched striped inductors that a minute inductance difference can be obtained by the combination of several values of the mutual inductance. The measurement results show an average frequency accuracy of 2.0 ppm and a maximum frequency accuracy of 26 ppm in the band of 12.4-12.6 GHz. Also, the phase noise of proposed DCO exhibits -98.0 dBc/Hz at 1-MHz offset from carrier. The process technology used in this work is ROHM 180 nm CMOS.

关键词： Inductance Inductors Conferences TV Switches

来源：评论

学校读者我要写书评

暂无评论

On the generalized derivations of bimodules

引用

Frontiers of Mathematics in China 2017年第1期12卷 135-142页

作者： Hiroaki KOMATSU Faculty of Computer Science and Systems Engineering Okayama Prefectural University Soja 719-1197 Japan

Recently, we introduced the notion of a generalized derivation from a bimodule to a bimodule. In this paper, we give a more general notion based on commutators which covers generalized derivations as a special case. U... 详细信息

关键词： Generalized derivation separable algebra extension

来源：评论

学校读者我要写书评

暂无评论

New Results of Synchronization Condition of the Non-Uniform Kuramoto Oscillators

New Results of Synchronization Condition of the Non-Uniform ...

引用

第37届中国控制会议

作者： Takayuki Shimohashi Xin Xin Shinsaku Izumi Taiga Yamasaki Faculty of Computer Science and Systems Engineering Okayama Prefectural University

This paper addresses the synchronization problem of the non-uniform Kuramoto oscillators,i.e.,the Kuramoto oscillators with non-homogeneous damping coefficients and coupling *** a solution to this problem,we present a new necessary condition for the synchronization of the n oscillators,and show that it is tighter than an existing necessary condition proposed in D ¨orfler and Bullo(SIAM Journal on Control and Optimization,vol.50,no.3,2012).For the oscillators of cases of n = 3,4,and 5,our numerical simulation investigations of 10000 systems for each case with the parameters generated randomly show that the conservativeness of the existing condition is reduced considerably by our newly presented condition.

关键词： Synchronization non-uniform Kuramoto oscillators non-homogeneous damping coefficients non-homogeneous coupling strengths

来源：评论

学校读者我要写书评

暂无评论

Analysis of Synchronization of n Metronomes on a Hanging Plate via Describing Function Method without Assumption on Amplitudes of Metronomes 36

Analysis of Synchronization of n Metronomes on a Hanging Pla...

引用

第36届中国控制会议

作者： Xin Xin Yoshinori Muraoka Shinsaku Izumi Taiga Yamasaki Faculty of Computer Science and Systems Engineering Okayama Prefectural University

ISBN: (纸本)9781538629185

This paper aims to analyze the synchronization phenomena in the system consisting of n identical metronomes on a hanging plate by using the describing function(DF) method, which deals with the driving torque as a discontinuous function of the angle and angular velocity of each metronome. Different from a previous study on the synchronization of the system with the first harmonic of the angle of each metronome having the same amplitude, this paper analyzes the synchronization without any assumption on the amplitudes of n metronomes. By investigating the relation between the motion of the hanging plate(common base) and n metronomes, this paper characterizes the synchronization phenomena by the following two types of synchronization:One is the inherent synchronization, whose frequency and amplitude of all synchronized metronomes are the same as those of a single metronome on a fixed base. The other is the non-inherent synchronization, which includes the in-phase synchronization with the same amplitude, and the synchronization with different amplitudes. The analytical results are validated by numerical simulation for three metronomes about the synchronization with the same or different amplitudes.

关键词： Synchronization metronomes pendulum clocks describing function phasor representation

来源：评论

学校读者我要写书评

暂无评论

Estimation of Machine Parameters in Superconducting Transformer using Differential Evolution

引用

Journal of Physics: Conference Series 2020年第1期1590卷

作者： T Yonenaka T Muraoka Y Ichiki E S Otabe Y Tokunaga Department of Computer Science and Electronics Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka 820-8502 Japan Faculty of Computer Science and Systems Engineering Okayama Prefectural University 111 Kuboki Soja Okayama 719-1197 Japan

To analyze the inrush current in a superconducting transformer, the machine parameters for the transformer were estimated from the measured current using a search algorithm. To address the large rising edge error in estimations performed using a genetic algorithm (GA), a differential evolution (DE) was used in this study. As a result, the estimated time was reduced to about 1/10 that obtained with GA, and the evaluation value indicating the difference between the measured value and the estimated value was reduced to about 1/2. Thus, it was possible to estimate with higher accuracy by using DE.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Properties of Knuth’s Quadratic Congruential Sequences with Modulus m = 2W p

Properties of Knuth’s Quadratic Congruential Sequences with...

引用

International Workshop on Signal Design and Its Applications in Communications (IWSDA)

作者： Takeru Miyazaki Shunsuke Araki Kohei Kawase Satoshi Uehara Yasuyuki Nogami Faculty of Environmental Engineering The University of Kitakyushu Kitakyushu Fukuoka Japan Faculty of Computer Science and Systems Engineering Kyushu Inst. of Technology Iizuka Fukuoka Japan Graduate School of Environmental Engineering The University of Kitakyushu Kitakyushu Fukuoka Japan Graduate School of Natural Science and Technology Okayama University Okayama Japan

The following topics are dealt with: binary sequences; set theory; computational complexity; matrix algebra; correlation methods; polynomials; error statistics; binary codes; random sequences; linear codes.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Relations Between Evaluations of NIST Tests and Lyapunov Exponents of Sequences Generated by the Piecewise Logistic Map over Integers

Relations Between Evaluations of NIST Tests and Lyapunov Exp...

引用

International Workshop on Signal Design and Its Applications in Communications (IWSDA)

作者： Sota Eguchi Takeru Miyazaki Shunsuke Araki Satoshi Uehara Yasuyuki Nogami Graduate School of Environmental Engineering The Univ. of Kitakyusyu Faculty of Environmental Engineering The Univ. of Kitakyushu Faculty of Computer Science and Systems Engineering Kyushu Inst. of Technology Graduate School of Natural Science and Technology Okayama University

In this paper, we focus on binary sequences obtained from piecewise logistic map over integers, and show the relation between the Lyapunov exponents of the maps and results of the NIST tests for the sequences. When the Lyapunov exponent is a negative value, we confirm that the branch diagram is sparse and the bit occurrence rate is also greatly biased. We also give a sample of that the positive/negative signs of the Lyapunov exponents mostly coincide on the evaluations of the NIST tests. From the branching diagram of the piecewise logistic map, we can moreover find that there are many good pseudorandom sequences generated by the individual control parameters of the map.

关键词： Logistics NIST Bifurcation Generators Environmental engineering Random sequences Indexes

来源：评论

学校读者我要写书评

暂无评论

A Speech-Driven Pupil Response System with Affective Expression Using Hemispherical Displays

A Speech-Driven Pupil Response System with Affective Express...

引用

IEEE International Symposium on Robot and Human Interactive Communication

作者： Yoshihiro SEJIMA Shoichi EGAWA Ryosuke MAEDA Yoichiro SATO Tomio WATANABE Faculty of Computer Science and System Engineering Okayama Prefectural University Soja-shi Okayama Japan Graduate School of Computer Science and Systems Engineering Okayama Prefectural University Soja-shi Okayama Japan

We developed an expressible pupil response inter face using hemispherical displays for enhancing human-robot communication. This interface looks like robot's eyeballs and expresses vivid pupil response by speech input. In particular, the interface can express exaggerated pupil response that human cannot express. In this study, for the basic research of realizing affinitive interaction in human-robot communication, we analyzed the pupil response with affective expression during utterance using a pupil measurement device. On the basis of the analysis result, we developed a speech-driven pupil response system with affective expression using hemispherical displays. This system expresses pupil response with various affective expression by speech input. We carried out an evaluation experiment by using a sensory evaluation with the system acting as the speaker. The result demonstrated that the system with affective expression is effective for enhancing affinitive interaction.

关键词： Three-dimensional displays Solid modeling Iris recognition computer science Face Robot sensing systems

来源：评论

学校读者我要写书评

暂无评论

An Entropy-Based Metric of Developer Contribution in Open Source Development and Its Application to Fault-Prone Program Analysis

引用

International Journal of Networked and Distributed Computing 2018年第3期6卷 118-132页

作者： Yamauchi, Kazuki Aman, Hirohisa Amasaki, Sousuke Yokogawa, Tomoyuki Kawahara, Minoru Graduate School of Science and Engineering Ehime University 3 Bunkyo-cho Matsuyama Ehime 790-8577 Japan Center for Information Technology Ehime University 3 Bunkyo-cho Matsuyama Ehime 790-8577 Japan Faculty of Computer Science and Systems Engineering Okayama Prefectural University 111 Kuboki Soja Okayama 719-1197 Japan Energia Communications Inc. Japan

To support successful quality managements of open source software (OSS) projects, this paper proposes to measure the balance of developers’ contributions to a source file as an entropy. Through an analysis of data collected from 10 popular OSS projects, the following trends are reported: a source file is more fault-prone as the developers’ contributions to the file are more imbalanced (lower entropy), and the proposed metric can be useful for predicting fault-prone programs. © the Authors 2018.

关键词： developer’s contribution entropy fault-prone program analysis Open source development

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：