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Nitrogen-bridged Ni(Ⅱ)porphyrinoid trimers with a central quinodiimine unit

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Chinese Chemical Letters 2022年第10期33卷 4545-4548页

作者： Kaisheng Wang Boyu Xiao Ling Xu Mingbo Zhou takayuki tanaka Atsuhiro Osuka Jianxin Song College of Chemistry and Chemical Engineering Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research(Ministry of Education of China)Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan ProvinceHunan Normal UniversityChangsha 410081China Department of Chemistry Graduate School of Science Kyoto UniversityKyoto 606-8502Japan

Buchwald-Hartwig amination of 5,15-dibromo and 5,10-dibromo Ni(Ⅱ)porphyrins with 5-amino Ni(Ⅱ)porphyrin gave linear and bent trimers 4Ni and 5Ni with a central quinodiimine-type Ni(Ⅱ)*** structures of 4Ni and 5Ni have been confirmed by X-ray diffraction analysis in both *** formation of unusual products 4Ni and 5Ni has been ascribed to facile oxidation of 5,15-and 5,10-amino Ni(Ⅱ)porphyrin *** of 4Ni and 5Ni under proper conditions gave NH-bridged Ni(Ⅱ)porphyrin trimers 4Ni-2H and 5Ni-2H in high *** 4Ni and 5Ni exhibit the lowest energy band as compared with 4Ni-2H and *** the bent trimer 5Ni exhibits a broad absorption tail beyond 1400 nm.

关键词： Porphyrinoid trimer Aminoporphyrins Buchwald-Hartwig amination Reduction Charge transfer

Power-Assisted Cart Control Method with Motor Torque Limiter Based on Prediction of Torque Saturation

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Journal of Energy and Power Engineering 2012年第8期6卷 1349-1357页

作者： Norihiro Kobayashi takayuki tanaka Shun' ichi Kaneko Graduate School of Information Science and Technology Hokkaido University Sapporo 060-0814 Japan

In this article, a method to control power-assisted carts with motor torque limiter that achieves the desired load-reduction ratio even if torque saturation occurs, is proposed to reduce the size and power consumption of power-assist systems. This method uses the ratio of the assist-force impulse to the operator-force impulse as an indicator for evaluating proposed method. Proposed method predicts the needs of the operator and delivers the desired load-reduction ratio by predicting operation. The results show that the target load-reduction ratio can be obtained with proposed control method and indicate that the target load-reduction ratio can be obtained with 80% force. By applying our proposed method, short available time of power-assisted carts will be improved.

关键词： Torque saturation power assisted cart minimum jerk model energy regeneration.

Local Retouching of Images by Histogram-based Similarity Evaluation

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Local Retouching of Images by Histogram-based Similarity Eva...

考虑空气悬挂系统滞后特性的准静态曲线通过分析程序

第二届亚洲机械电子学学术会议

作者： Shun’ichi Kaneko takayuki tanaka Hokkaido University Kita 14Nishi 9Kita-kuSapporoJapan

Quality of local regions in the scene could be deteriorated by the effects of ill-conditioned lighting effects and *** develop a method to improve the quality of local *** local region of the image is firstly selected by an algorithm that is based on similarity evaluation of the *** the histogram of brightness and saturation of the local region are expanded using the histogram equalization,both the brightness and saturation are *** the next step,based on the distance from the point selected by user,the improved data are combined with the original image. The local part of the image is naturally merged with the surrotmding scenes.

关键词： Local region similarity evaluation histogram equalization brightness saturation merge

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国外铁道机车与动车 2022年第3期 21-26页

作者： [日]takayuki tanaka 刘志荣(译) 不详

鉴于空气悬挂作为二系悬挂广泛应用于铁道车辆,其滞后特性对车辆运行特性(包括在曲线运行时轮载不必要的变化)可能会造成一定影响。考虑到空气悬挂滞后特性,为了能够准确、快速地预测车辆曲线通过性能,该研究提出基于可详细表达非线性... 详细信息

鉴于空气悬挂作为二系悬挂广泛应用于铁道车辆,其滞后特性对车辆运行特性(包括在曲线运行时轮载不必要的变化)可能会造成一定影响。考虑到空气悬挂滞后特性,为了能够准确、快速地预测车辆曲线通过性能,该研究提出基于可详细表达非线性气流特性的热力空气悬挂系统模型的新准静态曲线通过分析方法。该方法可以消除现有全动态仿真模型与高计算强度相关的限制,适用于长距离的车辆运行仿真。

关键词：空气悬挂车辆动态曲线通过耦合仿真

A single atom photocatalyst co-doped with potassium and gallium for enhancing photocatalytic hydrogen peroxide synthesis

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Nano Research 2024年第8期17卷 7027-7038页

作者： Wenan Cai Yuichiro tanaka Xing Zhu Teruhisa Ohno Department of Applied Chemistry Faculty of EngineeringKyushu Institute of TechnologyKitakyushu 804-8550Japan College of Bioresources Chemical and Materials Engineering Shaanxi University of Science&TechnologyXi’an 710021China

Polymer carbon nitride(PCN)is widely used in ***,pristine PCN has disadvantages such as insufficient visible light absorption and low photogenerated carrier separation efficiency that greatly limited the photocatalytic *** a non-toxic metal,gallium has the potential to solve the defects of *** ions coordinated with nitrogen in carbon nitride to form Ga-N active sites and improved the photocatalytic *** doped potassium ions form a transmission channel for charge redistribution and transfer between adjacent layers,which is beneficial for better separation of photoexcited *** this study,a series of PCN co-doped with gallium and potassium(Ga-K-PCN)were *** experimental results indicated photocatalytic generation of hydrogen peroxide proceeds through the 2e−oxygen reduction reaction ***,Nyquist plots and photocurrent results further proved that the presence of Ga-N sites and potassium ion doping could significantly improve the separation/transfer of intra-planar and interlayer charge carriers and thus enhance photocatalytic *** Ga10-K3-PCN photocatalysts promoted yield of H_(2)O_(2),with reactivity at 28.2μmol/(g·h)and solar-to-chemical conversion efficiency at 0.64%,surpassed that of a typical photo-catalyst based on PCN(0.18%).

关键词： photocatalysis gallium oxygen reduction reaction H_(2)O_(2) production

Fabrication of Mie-resonant silicon nanoparticles using laser annealing for surface-enhanced fluorescence spectroscopy

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Microsystems & Nanoengineering 2024年第2期10卷 133-141页

作者： Tatsuya Fukuta Ryo Kato Takuo tanaka Taka-aki Yano Institute of Post-LED Photonics Tokushima University2-1 Minami-JosanjimaTokushima770-8506Japan Innovative Photon Manipulation Research Team RIKEN Center for Advanced PhotonicsWakoSaitama351-0198Japan Metamaterials Laboratory RIKEN Cluster for Pioneering ResearchWakoSaitama351-0109Japan

Silicon nanostructures with unique Mie resonances have garnered considerable attention in the field of ***,we present a simple and efficient method for the fabrication of silicon(Si)nanoparticle substrates using continuous-wave(CW)laser *** resulting silicon nanoparticles exhibit Mie resonances in the visible region,and their resonant wavelengths can be precisely ***,laser-annealed silicon nanoparticle substrates show a 60-fold enhancement in *** tunable and fluorescence-enhancing silicon nanoparticle platform has tremendous potential for highly sensitive fluorescence sensing and biomedical imaging applications.

关键词： nanoparticles annealing resonant

Metabolomics in liver diseases: A novel alternative for liver biopsy?

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World Journal of Hepatology 2024年第1期16卷 12-16页

作者： Yasuo tanaka Department of Gastroenterology National Center for Global Health and MedicineTokyo 162-8655Japan

Hepatitis C virus(HCV)remains a significant public health problem as it can cause acute and chronic *** HCV infection is a major cause of liver fibrosis,and evaluation of liver fibrosis is essential because the prognosis of patients with chronic HCV infection is closely related to the stage of *** fibrosis is traditionally evaluated based on pathological analysis of biopsy specimens,which is considered the gold ***,liver biopsy is invasive and susceptible to sampling error and inter-and intraobserver variation in pathological interpretation;it is also ***,noninvasive diagnostic investigations have been developed,including the use of fibrotic markers,scoring systems based on routine blood tests,and transient elastography with magnetic resonance imaging or ***,metabolomics,an emerging technology,has been used to detect the fibrosis *** this editorial,I comment on the article titled“Metabolomics in chronic hepatitis C:Decoding fibrosis grading and underlying pathways”by Ferrasi et al published in the recent issue of the World Journal of Hepatology.I discuss previous studies on the use of metabolome analysis for the diagnosis of HCV-related liver fibrosis and the potential development of biopsy-free diagnostic techniques.

关键词： Metabolomics Hepatitis C virus Liver fibrosis Liver cirrhosis Serum biomarker

Exploiting fly models to investigate rare human neurological disorders

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Neural Regeneration Research 2025年第1期20卷 21-28页

作者： Tomomi tanaka Hyung-Lok Chung Department of Neurology Houston Methodist Research InstituteHoustonTXUSA Department of Neurology Weill Cornell Medical CollegeNew YorkNYUSA

Rare neurological diseases,while individually are rare,collectively impact millions globally,leading to diverse and often severe neurological *** attributed to genetic mutations that disrupt protein function or structure,understanding their genetic basis is crucial for accurate diagnosis and targeted *** investigate the underlying pathogenesis of these conditions,researchers often use non-mammalian model organisms,such as Drosophila(fruit flies),which is valued for their genetic manipulability,cost-efficiency,and preservation of genes and biological functions across evolutionary *** tools available in Drosophila,including CRISPR-Cas9,offer a means to manipulate gene expression,allowing for a deep exploration of the genetic underpinnings of rare neurological *** boasts a versatile genetic toolkit,rapid generation turnover,and ease of large-scale experimentation,making it an invaluable resource for identifying potential drug *** can expose flies carrying disease-associated mutations to various compounds,rapidly pinpointing promising therapeutic agents for further investigation in mammalian models and,ultimately,clinical *** this comprehensive review,we explore rare neurological diseases where fly research has significantly contributed to our understanding of their genetic basis,pathophysiology,and potential therapeutic *** discuss rare diseases associated with both neuron-expressed and glial-expressed *** cases include mutations in CDK19 resulting in epilepsy and developmental delay,mutations in TIAM1 leading to a neurodevelopmental disorder with seizures and language delay,and mutations in IRF2BPL causing seizures,a neurodevelopmental disorder with regression,loss of speech,and abnormal *** we explore mutations in EMC1 related to cerebellar atrophy,visual impairment,psychomotor retardation,and gain-of-function mutations in ACOX1 causing Mitchell ***-of-fun

关键词： ACOX1 Drosophila melanogaster glia lipid metabolism model organisms neuroinflammation neurologic disorders neuron rare disease VLCFA

Nash Equilibrium of a Fixed-Sum Two-Player Game

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American Journal of Computational Mathematics 2024年第3期14卷 346-357页

作者： Yoshihiro tanaka Faculty of Economics Hokkaido University Sapporo Japan

It is well established that Nash equilibrium exists within the framework of mixed strategies in strategic-form non-cooperative games. However, finding the Nash equilibrium generally belongs to the class of problems known as PPAD (Polynomial Parity Argument on Directed graphs), for which no polynomial-time solution methods are known, even for two-player games. This paper demonstrates that in fixed-sum two-player games (including zero-sum games), the Nash equilibrium forms a convex set, and has a unique expected payoff. Furthermore, these equilibria are Pareto optimal. Additionally, it is shown that the Nash equilibrium of fixed-sum two-player games can theoretically be found in polynomial time using the principal-dual interior point method, a solution method of linear programming.

关键词： Nash Equilibrium Fixed-Sum Two-Player Game Principal-Dual Interior Point Method