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Funabot-Suit:A bio-inspired and McKibben muscle-actuated suit for natural kinesthetic perception

Biomimetic Intelligence & Robotics 2023年第4期3卷 29-39页

作者： Yanhong Peng Yusuke Sakai koki nakagawa Yuki Funabora Tadayoshi Aoyama Kenta Yokoe Shinji Doki Department of Information and Communication Engineering Graduate School of EngineeringNagoya UniversityNagoya 4648601Japan Department of Micro-Nano Mechanical Science and Engineering Graduate School of EngineeringNagoya UniversityNagoya 4648601Japan

In recent years,there has been extensive utilization of actuators driven by artificial muscles in wearable ***,the muscle distribution configurations of most wearable devices have been specifically designed and are difficult to ***,wearable devices that allow direct installation of actuators onto existing clothing are better suited for a wider range of application *** letter presents the development and evaluation of Funabot-Suit,a human muscle configuration inspired wearable assist device that employs McKibben artificial muscles to induce natural kinesthetic perception in the wearer’s *** integrating thin McKibben muscles into an existing motion capture suit,the Funabot-Suit is capable of generating four fundamental motions:forward and backward bending,and left and right *** suit’s performance was assessed through experiments involving three subjects who wore the suit while standing and seated,with the subjects reporting the direction of their kinesthetic *** subjects also rated the perceived ease of kinesthetic perception direction on a five-point *** results demonstrate that the Funabot-Suit successfully induces kinesthetic perceptions for the wearer,with a one hundred percent detection ratio for accurate responses in the command direction across all subjects and *** observed variations in the sensitivity of left–right and up-down sensations,which can be attributed to the positioning of artificial muscles and individual differences.

关键词： Bio-inspired robotics Actuators Soft robotics Artificial muscles Haptic interfaces Kinesthetic perception

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Enhancing Offensive Language Detection with Data Augmentation and Knowledge Distillation

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Research 2024年第2期6卷 29-40页

作者： Jiawen Deng Zhuang Chen Hao Sun Zhexin Zhang Jincenzi Wu Satoshi nakagawa Fuji Ren Minlie Huang The CoAl group DCSTInstitute for Artificial InteligenceState Key Lab of Intelligent Technology and SystemsBeijing National Research Center for Information Science and TechnologyTsinghua UniversityBeijing 100084China Graduate School of Information Science&Technology The University of Tokyo.Tokyo 1138654Japan School of Computer Science and Engineering University of Electronic Science and Technology of ChinaChengduSichuan611731China

Offensive language detection has received important attention and plays a crucial role in promoting healthy communication on social platforms,as well as promoting the safe deployment of large language *** data is the basis for developing detectors;however,the available offense-related dataset in Chinese is severely limited in terms of data scale and coverage when compared to English *** significantly affects the accuracy of Chinese offensive language detectors in practical applications,especially when dealing with hard cases or out-of-domain *** alleviate the limitations posed by available datasets,we introduce AugCOLD(Augmented Chinese Offensive Language Dataset),a large-scale unsupervised dataset containing 1 million samples gathered by data crawling and model ***,we employ a multiteacher distillation framework to enhance detection performance with unsupervised *** is,we build multiple teachers with publicly accessible datasets and use them to assign soft labels to *** soft labels serve as a bridge for knowledge to be distilled from both AugCOLD and multiteacher to the student network,i.e.,the final offensive *** conduct experiments on multiple public test sets and our well-designed hard tests,demonstrating that our proposal can effectively improve the generalization and robustness of the offensive language detector.

关键词： COLD dealing limitations

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Unveiling a novel metal-to-metal transition in LuH_(2):Critically challenging superconductivity claims in lutetium hydrides

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Matter and Radiation at Extremes 2024年第3期9卷 65-73页

作者： Dong Wang Ningning Wang Caoshun Zhang Chunsheng Xia Weicheng Guo Xia Yin Kejun Bu Takeshi nakagawa Jianbo Zhang Federico Gorelli Philip Dalladay-Simpson Thomas Meier Xujie Lü Liling Sun Jinguang Cheng Qiaoshi Zeng Yang Ding Ho-kwang Mao Center for High-Pressure Science and Technology Advanced Research Beijing 100094China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China Shanghai Key Laboratory of Material Frontiers Research in Extreme Environments(MFree) Shanghai Advanced Research in Physical Sciences(SHARPS)Shanghai 201203China

Following the recent report by Dasenbrock-Gammon et al.[Nature 615,244–250(2023)]of near-ambient superconductivity in nitrogendoped lutetium trihydride(LuH_(3-δ)N_(ε)),significant debate has emerged surrounding the composition and interpretation of the observed sharp resistance ***,we meticulously revisit these claims through comprehensive characterization and *** definitively identify the reported material as lutetium dihydride(LuH_(2)),resolving the ambiguity surrounding its *** similar conditions(270–295 K and 1–2 GPa),we replicate the reported sharp decrease in electrical resistance with a 30%success rate,aligning with the observations by Dasenbrock-Gammon et ***,our extensive investigations reveal this phenomenon to be a novel pressure-induced metal-to-metal transition intrinsic to LuH_(2),distinct from ***,nitrogen doping exerts minimal impact on this *** work not only elucidates the fundamental properties of LuH_(2)andLuH_(3),but also critically challenges the notion of superconductivity in these lutetium hydride *** findings pave the way for future research on lutetium hydride systems,while emphasizing the crucial importance of rigorous verification in claims of ambient-temperature superconductivity.

关键词： resistance hydride superconductivity

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Ultrafast dynamics in photo-excited Mott insulator Sr_(3)Ir_(2)O_7 at high pressure

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Chinese Physics B 2024年第1期33卷 149-155页

作者：尹霞张建波王东 Takeshi nakagawa 夏春生张曹顺郭伟程昌峻丁阳 Center for High-Pressure Science and Technology Advanced Research Beijing 100094China College of Physics and Information Technology Shaanxi Normal UniversityXi'an 710119China

High-pressure ultrafast dynamics,as a new crossed research direction,are sensitive to subtle non-equilibrium state changes that might be unresolved by equilibrium states measurements,providing crucial information for studying delicate phase transitions caused by complex interactions in Mott *** time-resolved transient reflectivity measurements,we identified the new phases in the spin–orbit Mott insulator Sr_(3)Ir_(2)O_7 at 300 K that was previously unidentified using conventional approaches such as x-ray *** pressure-dependent variation of the amplitude and lifetime obtained by fitting the reflectivity?R/R reveal the changes of electronic structure caused by lattice distortions,and reflect the critical phenomena of phase *** findings demonstrate the importance of ultrafast nonequilibrium dynamics under extreme conditions for understanding the phase transition of Mott insulators.

关键词： ultrafast dynamics high pressure phase transition Mott insulator

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Prediction of Photosynthetic Carbon Assimilation Rate of Individual Rice Leaves under Changes in Light Environment Using BLSTM-Augmented LSTM

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Computer Modeling in Engineering & Sciences 2022年第12期133卷 557-577页

作者： Masayuki Honda Kenichi Tatsumi Masaki nakagawa Graduate School of Bio-Applications and Systems Engineering Tokyo University of Agriculture and TechnologyKoganei City184-8588Japan Institute of Agriculture Tokyo University of Agriculture and TechnologyFuchu City183-0054Japan Institute of Engineering Tokyo University of Agriculture and TechnologyKoganei City184-8588Japan

A model to predict photosynthetic carbon assimilation rate(A)with high accuracy is important for forecasting crop yield and *** short-term memory(LSTM),a neural network suitable for time-series data,enables prediction with high accuracy but requires mesophyll *** addition,for practical use,it is desirable to have a technique that can predict A from easily available *** this study,we propose a BLSTM augmented LSTM(BALSTM)model,which utilizes bi-directional LSTM(BLSTM)to indirectly reproduce the mesophyll variables required for *** most significant feature of the proposed model is that its hybrid architecture uses only three relatively easy-to-collect external environmental variables—photosynthetic photon flux density(Q_(in)),ambient CO_(2) concentration(C_(a)),and temperature(T_(air))—to generate mesophyll CO_(2) concentration(C_(i))and stomatal conductance to water vapor(g_(sw))as intermediate ***,A is predicted by applying the obtained intermediate outputs to the learning ***,in this study,1)BALSTM(Q_(in),C_(a),T_(air))had a significantly higher A prediction accuracy than LSTM(Q_(in),C_(a),T_(air))in case of using only Q_(in),C_(a),and T_(air);2)BALSTMC_(i),g_(sw),which had C_(i) and g_(sw) as intermediate products,had the highest A prediction accuracy compared with other candidates;and 3)for samples where LSTM(Q_(in),C_(a),T_(air))had poor prediction accuracy,BALSTMC_(i),g_(sw)(Q_(in),C_(a),T_(air))clearly improved the ***,it was found that incorrect predictions may be formed when certain factors are not reflected in the data(e.g.,timing,cultivar,and growth stage)or when the training data distribution that accounts for these factors differs from the predicted data ***,a robust model should be constructed in the future to improve the prediction accuracy of A by conducting gasexchange measurements(including a wide range of external environmental values)and by increasing the

关键词： Hybrid prediction model assimilation rate leaf internal variables recurrent neural network fluctuating light environments rice

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生物质和塑料加氢脱氧制备燃料和化学品的双金属催化剂研究进展

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Chinese Journal of Catalysis 2024年第7期62卷 1-31页

作者：刘露杰刘奔中川善直刘斯宝王亮藪下瑞帆冨重圭一浙江大学化学工程与生物工程学院生物质化工教育部重点实验室浙江杭州310027 日本东北大学(Tohoku University)工学部应用化学系仙台日本福建师范大学环境与资源学院聚合物资源绿色循环利用教育部工程研究中心福建省污染控制与资源循环利用重点实验室福建福州350007 日本东北大学(Tohoku University)材料科学高等研究所仙台日本

在全球致力于实现碳中和的大背景下,生物质和废弃塑料的高值化利用已成为科研领域的研究热点.加氢脱氧反应(HDO),作为实现这一目标的重要途径之一,通过精准解离C-O/C-C键,为生产燃料和化学品提供了有效方法.在HDO过程中,C-O键的氢解及... 详细信息

在全球致力于实现碳中和的大背景下,生物质和废弃塑料的高值化利用已成为科研领域的研究热点.加氢脱氧反应(HDO),作为实现这一目标的重要途径之一,通过精准解离C-O/C-C键,为生产燃料和化学品提供了有效方法.在HDO过程中,C-O键的氢解及不饱和键的氢化是主要步骤,而C-C键的氢解则是需要避免的副反应.与简单的氢化反应相比,HDO过程需要具有双功能特性的催化剂,特别是当目标产物为含氧化合物时,催化剂的区域选择性至关重要.近年来,双金属催化剂在生物质及其衍生物以及含氧塑料废弃物和聚合物的HDO过程中的应用受到广泛关注.通过深入理解金属纳米颗粒与金属氧化物之间的协同作用和强相互作用,双金属催化剂的理性设计取得了显著进展.特别是,部分金属氧化物(如ReO_(x),WO_(x),MoO_(x),FeO_(x))与贵金属(如Ir,Pt,Ru)之间存在的强相互作用,不仅促进了C-O键的断裂,还有效保留了C-C键,为催化剂的高活性和高选择性奠定了基础.通过调整催化剂组成、使用小比表面积的载体等方法,可以进一步优化催化剂性能.本综述聚焦于金属氧化物改性的贵金属催化剂在HDO反应中的最新研究进展,特别是总结了Ir、Pt和Ru基催化剂在HDO反应中的应用.由于这类催化剂的结构和性能能够精确控制,并且每种催化剂都具备独特的选择性,因此被广泛应用于生物质衍生物和塑料废弃物的HDO过程中.本文总结了双金属催化剂的结构特点、HDO反应机制、催化剂结构与催化性能之间的关联,以及这些催化剂在高附加值化学品生产中的实际应用.我们以甘油和1,2-丙二醇的氢解为模型反应,深入探讨了基于Ir、Pt和Ru的双金属催化剂的催化性能、结构特点和催化机理.这些催化剂在温和条件下实现了高效的氢脱氧反应,有效抑制了C-C键的断裂,并优化了化学选择性和区域选择性.双金属催化剂在生物质精炼和塑料/聚合物转化方面展现出广泛的适用性.本文还介绍了其在木质纤维素衍生原料、羰基化合物以及聚碳酸酯等塑料中的应用.然而,双金属催化剂的稳定性在实际应用中仍面临挑战,如金属烧结、浸出、积碳及金属-金属氧化物界面的重构等问题.因此,未来的研究重点是开发高效的再生方法和高度稳定的催化剂.综上所述,金属氧化物改性的贵金属催化剂在HDO反应中展现出巨大潜力.通过深入研究和优化,有望为生物质和塑料的高值化利用提供有效解决方案.本文旨在为双金属催化剂的理性设计和优化提供参考,以期推动生物质和塑料的高值化利用技术的进一步发展和应用.

关键词：加氢脱氧氢解双金属催化剂生物质衍生物塑料废弃物

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Safety and feasibility of laparoscopic pancreatoduodenectomy

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Hepatobiliary Surgery and Nutrition 2022年第2期11卷 330-332页

作者： Nobuhiko nakagawa Yuichi Nagakawa Shingo Kozono Department of Gastrointestinal and Pediatric Surgery Tokyo Medical UniversityTokyoJapan

Laparoscopic pancreaticoduodenectomy(LPD)has been safely performed by experts with favorable surgical ***,the feasibility of LPD remains *** is generally considered a challenging operation that requires advanced laparoscopic *** particular,pancreatic reconstruction can be safely performed by only laparoscopic ***,guidelines created by LPD experts are valuable in indicating the future direction of *** et *** practical guidelines regarding the safety and feasibility of LPD with 28 international experts from eight countries(1).To create these guidelines,the first summit on minimally invasive pancreatico-biliary surgery was held in Wuhan,China,to promote the development of *** on a systematic literature review and expert opinions,16 statements were created by the *** statements provide useful guidelines not only for surgical trainees who will attempt LPD but also for specialized *** expert consensus will contribute to the safe implementation of LPDs in the future.

关键词： laparoscopic specialized safely

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Increased utilization and mass activity of PtRu on reduced graphene oxide by heat treatment of its aerogel followed by composite with nanomaterials

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Carbon Resources Conversion 2023年第3期6卷 205-214页

作者： Kenta Dejima Hirokazu Ishitobi He Gao Mai Saito Nobuyoshi nakagawa Graduate School of Science and Technology Gunma University1-5-1Tenjin-choKiryuGunma 376-8515Japan Division of Environmental Engineering Science Gunma University1-5-1Tenjin-choKiryuGunma 376-8515Japan Faculty of Science and Technology Gunma University1-5-1Tenjin-choKiryuGunma 376-8515Japan

The method to increase PtRu utilization and its catalytic activity of PtRu nanoparticles supported on reduced graphene oxide(RGO)by avoiding its restacking was proposed with the aim of developing an active catalyst for a direct methanol fuel *** heat treatment at 200◦C of the GO aerogel(GOA)prepared by freeze drying of GO ice was introduced to weaken the attractive force of the hydrogen bonding between the GO sheets followed by the composite with the nanoparticles,i.e.,ketjenblack(KB),TiO_(2)and Ti_(4)O_(7),at different weight *** catalyst supported on the heat-treated GOA(RGOA),PtRu/RGOA,improved the PtRu utilization to some extent and also increased the ECSA and mass activity compared to that of PtRu/*** had fewer oxygen functional groups,especially the epoxy *** to the treatment and composite,the PtRu utilization was increased from 66.5%for PtRu/RGO to 128.6%for PtRu/RGOA+Ti_(4)O_(7)(4:1)and the mass activity was improved from 50.7 A/g-PtRu for PtRu/RGO to 130.5 A/g-PtRu for PtRu/RGOA+Ti_(4)O_(7)(1:1).The Ti_(4)O_(7)nanoparticles showed the best catalytic performance for the composite suggesting that the strong interaction between Ti_(4)O_(7)and the Pt nanoparticles was effective due to its high electronic conductivity.

关键词： Reduced graphene oxide Restacking Catalyst utilization Mass activity Composite catalyst Methanol oxidation Ti4O7

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A weeding-duration model for Abies sachalinensis plantations in Hok-kaido, northern Japan

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Journal of Forestry Research 2013年第1期24卷 131-136页

作者： Masahiko nakagawa Doto Station Forestry Research InstituteHokkaido Research OrganizationShintoku-choHokkaido081-0038Japan

I developed a weeding-duration model for Sakhalin fir （Abies sachalinensis （Fr. Schmidt） Masters） plantations that employs a generalized linear model. The number of years following planting that weeding is necessary is the response variable, and elevation, slope steepness, maximum snow depth, annual precipitation, geology, soil, site index, slope aspect, and vegetation type are explanatory variables. Among the explanatory variables, geology, soil, slope aspect, and vegetation type are categorical data. A Poisson distribution is assumed for the response variable, with a log-link function. Elevation, slope steepness, maximum snow depth, annual precipitation, site index, and vegetation type had a significant effect on weeding duration. Among the eight models with the smallest Akaike information criterion （AIC）, I chose the model with no multicollinearity among the explanatory variables. The weeding-duration model includes site index, maximum snow depth, slope steepness （angle） and vegetation type as explanatory variables; elevation and annual precipitation were not included in the selected model because of multicollinearity with maximum snow depth. This model is useful for cost-benefit analyses of afforestation or reforestation with Abies sachalinensis.

关键词： Abies sachalinensis plantation snow depth site index weeding

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On the Numerical Modeling of the Deep Mantle Water Cycle in Global-Scale Mantle Dynamics:The Effects of the Water Solubility Limit of Lower Mantle Minerals

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Journal of Earth Science 2017年第4期28卷 563-577页

作者： Takashi nakagawa Department of Mathematical Science and Advanced Technology Japan Agency for Marine-Earth Science and TechnologyYokohama 236-0001Japan

Water is the most important component in Earth system evolution. Here, I review the current understanding of the fate of water in the mantle dynamics system based on high-pressure and temperature experiments, geochemical analyses, seismological and geomagnetic observations, and nu- merical modeling of both regional- and giobal-scale mantle dynamics. In addition, as a numerical ex- ample, I show that the water solubility of the deep mantle is strongly sensitive to global-scale water cir- culation in the mantle. In a numerical example shown here, water solubility maps as functions of tem- perature and pressure are extremely important for revealing the hydrous structures in both the mantle transition zone and the deep mantle. Particularly, the water solubility limit of lower mantle minerals should be not so large as ~100 ppm for the mantle transition zone to get the largest hydrous reservoir in the giobal-scale mantle dynamics system. This result is consistent with the current view of mantle water circulation provided by mineral physics, which is also found as a hydrous basaltic crust in the deep mantle and the water enhancement of the mantle transition zone simultaneously. In this paper, I also discuss some unresolved issues associated with mantle water circulation, its influence on the onset and stability of plate motion, and the requirements for developing Earth system evolution in mantle dy- namics simulations.

关键词： numerical modeling mantle convection water cycle water solubility limit.

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