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Advances in Digital Front-End and Software RF Processing:Part I

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ZTE Communications 2011年第3期9卷 1-2页

作者： Mikko Valkama Serioja Ovidiu TatuTomohisa wada

One of the biggest technology trends in wireless broadband, radar, sonar, and broadcasting systems is software radio frequency processing and digital front-end. This trend encompasses a broad range of topics, from circuit design and signal processing to system integration. It includes digital up-conversion （DUC） and down-conversion （DDC）, digital predistortion （DPD）,

关键词： RF Advances in Digital Front-End and Software RF Processing SDR

尼日利亚卡诺市高中生对物理学课程掌握情况的性别差异评估

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尼日利亚卡诺市高中生对物理学课程掌握情况的性别差异评估

作者： Suleiman Bashir wada 华东师范大学

学位级别：硕士

本研究的主要目的是评估尼日利亚卡诺市高中生对物理学课程掌握情况的性别差异。本研究随机抽取了该市8所提供物理课程的混合中学,从随机抽取的341名学生中,分别随机抽取了170名女生和171名男生。本研究使用的问卷工具改编自Ololobou（2... 详细信息

本研究的主要目的是评估尼日利亚卡诺市高中生对物理学课程掌握情况的性别差异。本研究随机抽取了该市8所提供物理课程的混合中学,从随机抽取的341名学生中,分别随机抽取了170名女生和171名男生。本研究使用的问卷工具改编自Ololobou（2010）“物理学教育目标和领域”（Educational Goals and Domains of Physics）一文,其中提出了物理学教育领域的相关问题,包括知识、态度、价值观和技能。在此基础上,本研究提出了四个研究问题和四个研究假设,通过使用SPSS21.0版本收集和分析数据回答研究问题,通过独立样本t检验验证研究假设。研究结果表明,男女高中生在掌握物理学的知识、态度和价值观方面都没有明显差异,但是,在掌握物理学的技能方面,男女高中生之间存在显著差异,女生比男生表现更好。作者建议应该在各级教育中减少性别差异现象。政府、家长、教师及其他教育利益相关者应该共同合作采取措施,如向发达国家借鉴学习,组织研讨会、公开讲座、会议和讨论会等。教育政策制定者应该雇用专业的物理教师,并且应该教导学生取得优秀学习成绩的重要性。

关键词：性别差异学生学习成绩物理教育课程设计

Experimental Evaluation of the Post-ultimate Strength Behavior of a Ship＇s Hull Girder in Waves

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Journal of Marine Science and Application 2012年第1期11卷 34-43页

作者： Kazuhiro Iijima Ryota wada Masahiko Fujikubo Department of Naval Architecture and Ocean Engineering Osaka UniversityOsaka 565-0871Japan

Experimental investigations into the collapse behavior of a box-shape hull girder subjected to extreme wave-induced loads are *** experiment was performed using a scaled model in a *** the middle of the scaled model,sacrificial specimens with circular pillar and trough shapes which respectively show different bending moment-displacement characteristics were mounted to compare the dynamic collapse characteristics of the hull girder in *** specimens were designed by using finite element(FE)-*** to the tank tests,static four-point-bending tests were conducted to detect the load-carrying capacity of the hull *** was shown that the load-carrying capacity of a ship including reduction of the capacity after the ultimate strength can be reproduced experimentally by employing the trough type *** tests using these specimens were performed under a focused wave in which the hull girder collapses under once and repetitive focused *** was shown from the multiple collapse tests that the increase rate of collapse becomes higher once the load-carrying capacity enters the reduction path while the increase rate is lower before reaching the ultimate strength.

关键词： post-ultimate strength collapse behavior experimental evaluation load-carrying capacity hull girder

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黄山短尾猴的左右手倾向(英文)

动物学报 2007年第3期53卷 570-574页

作者： Kunio WATANABE Kazuo wada 李进华 Primate ResearchInstitute Kyoto University Kanrin 41-2 Inuyama Aichi 484-8506 Japan 西北大学生命科学学院安徽大学生命科学院合肥230039

就取食过程中惯用左手还是右手的问题,我们对安徽省黄山的一群短尾猴进行了研究。结果发现在调查的33只个体中,9只惯用右手取食,11只惯用左手取食,另外13只对左右手的使用没有偏好。而且短尾猴在左右手的偏好方面也没有性别或年龄的差... 详细信息

就取食过程中惯用左手还是右手的问题,我们对安徽省黄山的一群短尾猴进行了研究。结果发现在调查的33只个体中,9只惯用右手取食,11只惯用左手取食,另外13只对左右手的使用没有偏好。而且短尾猴在左右手的偏好方面也没有性别或年龄的差异。以往的一些研究表明猕猴类动物习惯于用左手取食,但是研究群的短尾猴并没有表现出这种倾向。我们将短尾猴的研究结果与猕猴属其它种类进行了比较,并讨论了猕猴属在这一行为上的多样性。

关键词：短尾猴惯用手偏向性黄山

How many donor colonies should be cross-fertilized for nursery farming of sexually propagated corals?

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Natural Resources 2014年第10期5卷 521-526页

作者： Kenji Iwao Naohisa wada Aki Ohdera Makoto Omori Akajima Marine Science Laboratory Zamamison Okinawa Japan Department of Biology Eberly College of Science The Pennsylvania State University University Park USA Department of Marine Science and Resources College of Bioresource Science Nihon University Kameino Fujisawa Japan

Coral reef restoration approaches have often utilized adult colonies as sources for fragments (i.e. clones) to be transplanted. Although restoration through this method is fast and cheap, it has been pointed out that it may reduce genetic diversity of the restored population. Low genetic diversity is a concern for reef restoration when seed fragments are raised asexually from only a few donor colonies. This can lead to lower fertilization rates among seed fragments, and reducing the longterm benefits of reef restoration in particular areas. Additionally, low genetic diversity can compound the effects of increased ocean temperature and other environmental stressors, further jeopardizing the health of a reef. An alternative approach through sexually propagated coral cultures and out-plantings can alleviate this problem. Sexually produced offsprings are more genetically diverse. They can be produced in far greater numbers than coral fragments and do not imply destructive methods. Ongoing research at the Akajima Marine Science Laboratory in Okinawa, Japan has helped to improve the production and maintenance of sexually propagated larval cultures. Our results show that crosses between gametes from 6 or more colonies will provide the highest fertilization rate (>95%). Based on the results, we suggest the use of 6 or more donor colonies for practical gamete fertilization in sexually derived coral culture.

关键词： Acropora Coral Farming Coral Reefs Gamete Fertilization Genetic Diversity Reef Rehabilitation

Collective Calculation of Actual Values of Non-Photochemical Quenching from Their Apparent Values after Chloroplast Movement and Photoinhibition

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American Journal of Plant Sciences 2015年第11期6卷 1792-1805页

作者： Ichiro Kasajima Noriyuki Suetsugu Masamitsu wada Kentaro Takahara Institute for Environmental Science and Technology Saitama University Saitama Japan Institute of Molecular and Cellular Biosciences University of Tokyo Tokyo Japan Graduate School of Science and Engineering Saitama University Saitama Japan Department of Agriculture Iwate University Morioka Japan Department of Biology Faculty of Sciences Kyushu University Fukuoka Japan Graduate School of Biostudies Kyoto University Kyoto Japan

Chlorophyll fluorescence parameters such as Fv/Fm, NPQ and ΦII (YII) are widely used to estimate the fitness and photosynthetic activity of plant leaves and non-photochemical dissipation of excessive excitation energy in photosystem II. The effect of chloroplast movement on these fluorescence parameters reduces the accuracy of estimations of the size of de-excitation processes, but there is no method to calculate correct parameters from altered (fluctuated) parameters. Chloroplast movement was recently identified as the “middle” kinetic component of NPQ. In this paper, we devised a complex but reasonable mathematical method to remove the effect of chloroplast movement on fluorescence parameters, based on our previously reported fluorescence theory. The fraction of “S fluctuation” (designated as σ) was estimated from fluorescence observations and used to calculate the non-fluctuated Fs and F′m. fluorescence yields. From the σ values, the fractional change of light absorbance by a leaf caused by chloroplast movement was estimated at 70% - 100%, which varied according to the experimental conditions and plant species. The effect of photoinhibition on fluorescence parameters was also examined in this paper. The photochemical and non-photochemical de-excitation sizes during photoinhibition (measured by the parameters qPI and qSlow) changed on a single regression line. Using this correlation, qPI and qSlow can be predicted from Fv/Fm, and the non-fluctuated Fm and Fo values can be estimated from the fluctuated F″m and F″o values.

关键词： Arabidopsis thaliana Chlorophyll Fluorescence Non-Photochemical Quenching Rice

Investigation of Shunt Active Power Filters in Railway Systems, Substation Installation

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Journal of Energy and Power Engineering 2013年第10期7卷 1974-1979页

作者： wada Hosny Han-Eol Parjk Joong-Ho Song School of Architecture Computing and Engineering University o fEast London London E16-2RD Docklands England Department of Electrical Engineering and Information Technology Seoul National University of Science and Technology Seoul139-743 South Korea

This paper investigates the performance of SAPFs （shunt active power filters） which are introduced in order to address the quality issues in electrified railway supply systems. These filters can be installed at either the S/S （substation） end or at the SP （sectioning post） of the railway feeding power system. In this investigation novel control algorithms, based on the synchronously rotating frame of reference, are proposed for the case when the SAPF is installed at the substation end and its performance is assessed. The effectiveness of the proposed control algorithms are illustrated via Matlab/SimPower computer simulations and validated via comparisons with other publications. This investigation demonstrated that when the SAPF is installed at the substation side, it can effectively compensate for the higher harmonic supply current. In addition, the reactive power demand is fully compensated for, leading to close to unity power factor. However, the voltage drop/sag at the locomotive power supply feed point is only partially compensated for.

关键词： AC electrified railway systems shunt active power filters substation installation.

A simulation study of a windowless gas-stripping room in an E//B neutral particle analyzer

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Nuclear Science and Techniques 2021年第7期32卷 22-30页

作者： Yuan Luo Wei-Ping Lin Pei-Pei Ren Guo-Feng Qu Jing-Jun Zhu Xing-Quan Liu Xiao-Bing Luo Zhu An Roy wada Lin-Ge Zang Yu-Fan Qu Zhong-Bing Shi Key Laboratory of Radiation Physics and Technology of the Ministry of Education Institute of Nuclear Science and TechnologySichuan UniversityChengdu 610064China Cyclotron Institute Texas A&M UniversityCollege StationTX 77843USA School of Physics Henan Normal UniversityXinxiang 453007China Southwestern Institute of Physics Chengdu 610064China

The neutral particle analyzer(NPA)is one of the crucial diagnostic devices in a Tokamak *** stripping unit is one of the main parts of the NPA.A windowless gas-stripping room with two differential pipes has been constructed in a parallel electric and magnetic fields(E//B)*** pressure distributions in the stripping chamber are simulated by ANSYS Fluent together with MolFlow+.Based on the pressure distributions obtained from the simulation,the stripping efficiency of the E//B NPA is studied using *** reaction physics is modified to track the charge state of each particle in a cross-section-based method in *** transmission rates(R)and stripping efficiencies f_(+1)are examined for particle energies ranging from 20 to 200 keV with the input pressure(P_(0)),ranging from 20 to 400 *** to the combined global efficiency,R×f_(+1),P_(0)=240 Pa is obtained as the optimum pressure for the maximum global efficiency in the incident energy range investigated.

关键词： Neutral particle analyzer Windowless gas-stripping chamber Stripping efficiency Ansys Fluent MolFlow+ GEANT4

Stress-Induced Flowering in Pharbitis—A Review

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American Journal of Plant Sciences 2013年第12期4卷 74-79页

作者： Kaede C. wada Mizuki Yamada Kiyotoshi Takeno Department of Applied Biological Chemistry Faculty of Agriculture Niigata University Niigata Japan Graduate School of Science and Technology Niigata University Niigata Japan Graduate School of Science and Technology Niigata University Niigata Japan Department of Biology Faculty of Science Niigata University Niigata Japan

Many plant species are induced to flower by stress. Stress-induced flowering has been studied mostly in the short-day plant pharbitis (also called Japanese morning glory;Ipomoea nil, formerly Pharbitis nil). In this article, physiological characteristics, the regulation by salicylic acid (SA) and the expression of flowering-related genes in stress-induced flowering in pharbitis are reviewed. Pharbitis flowered under long-days in response to poor nutrition or low temperature. The pharbitis plants induced to flower by stress reached anthesis, fruited and produced fertile seeds. The progeny of the stressed plants developed normally. Grafting experiments indicated that a transmissible flowering stimulus is involved in poor nutrition stress-induced flowering. Aminooxyacetic acid (AOA), a phenylalanine ammonia-lyase (PAL) inhibitor, inhibited the stress-induced flowering, and this inhibition was overcome by SA. Stress induced PAL activity and SA biosynthesis. PnFT2, a pharbitis ortholog of the flowering gene FLOWERING LOCUS T of Arabidopsis thaliana, was expressed when the plants were induced to flower by stress. The overexpression of PnFT2 induced flowering, and PnFT2RNAi inhibited it. AOA inhibited PnFT2 expression induced by stress, and SA eliminated this inhibitory effect. SA enhanced PnFT2 expression under poor nutrition but not under non-stressful conditions. Therefore, stress may induce the production of SA and other unknown factor(s) that may work in combination to induce PnFT2 expression and flowering.

关键词： Flowering Pharbitis PnFT Salicylic Acid Stress