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A Bitcoin Address Multi-Classification Mechanism Based on Bipartite Graph-Based Maximization Consensus

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Computer Modeling in Engineering & Sciences 2024年第4期139卷 783-800页

作者： Lejun Zhang Junjie Zhang Kentaroh toyoda Yuan Liu Jing Qiu Zhihong Tian Ran Guo College of Information Engineering Yangzhou UniversityYangzhou225127China Cyberspace Institute Advanced Technology Guangzhou UniversityGuangzhou510006China Research and Development Center for E-Learning Ministry of EducationBeijing100039China Institute of High Performance Computing(IHPC) Agency for ScienceTechnology and Research(A∗STAR)Singapore138632Singapore School of Physics and Materials Science Guangzhou UniversityGuangzhou510006China

Bitcoin is widely used as the most classic electronic currency for various electronic services such as exchanges,gambling,marketplaces,and also scams such as high-yield investment *** the services operated by a Bitcoin address can help determine the risk level of that address and build an alert model *** engineering can also be used to flesh out labeled addresses and to analyze the current state of Bitcoin in a small *** this paper,we address the problem of identifying multiple classes of Bitcoin services,and for the poor classification of individual addresses that do not have significant features,we propose a Bitcoin address identification scheme based on joint multi-model prediction using the mapping relationship between addresses and *** innovation of the method is to(1)Extract as many valuable features as possible when an address is given to facilitate the multi-class service identification task.(2)Unlike the general supervised model approach,this paper proposes a joint prediction scheme for multiple learners based on address-entity mapping ***,after obtaining the overall features,the address classification and entity clustering tasks are performed separately,and the results are subjected to graph-basedmaximization *** final result ismade to baseline the individual address classification results while satisfying the constraint of having similarly behaving entities as far as *** testing and evaluating over 26,000 Bitcoin addresses,our feature extraction method captures more useful *** addition,the combined multi-learner model obtained results that exceeded the baseline classifier reaching an accuracy of 77.4%.

关键词： Bitcoin multi-service classification graph maximization consensus data security

Porphyrin/Fullerene Porous Molecular Cocrystal Featuring a Robust One-Dimensional Channel

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Precision Chemistry 2024年第9期2卷 480-487页

作者： Nobuhiro Sato Ryojun toyoda Tetsu Sato Zi Lang Goo Shinya Takaishi Koki Chida Takeharu Yoshii Hirotomo Nishihara Kunihisa Sugimoto Ryota Sakamoto Department of Chemistry Graduate School of ScienceTohoku UniversitySendai 980-8578Japan Department of Chemistry Kindai UniversityOsaka 577-8502Japan Institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendaiMiyagi 980-8577Japan Institute of Multidisciplinary Research for Advanced Materials and Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendaiMiyagi 980-8577Japan Division for the Establishment of Frontier Sciences of Organization for Advanced Studies Tohoku UniversitySendai 980-8577Japan

Microporous molecular crystals are promising materials because of their designable porosity as well as their resistance to chemical and other ***,we developed microporous molecular cocrystals by taking advantage of the specific interactions between porphyrins and fullerene ***-crystal X-ray diffraction analysis revealed that one nickel(II)porphyrin interacts with two fullerene molecules to form a two-dimensional honeycomb network with an eclipsed stacking mode,providing onedimensional void *** the pores were activated by heat treatment or mechanical grinding,the prepared cocrystal can incorporate gas and solvent molecules reversibly while maintaining its ***,it retained its single-crystallinity in the presence of water,acid−base,or high *** findings in this study expand the availability of molecular crystals based on intermolecular interactions as porous materials,which are expected to work under conditions that have not been applicable to other molecule-based porous materials.

关键词： Microporous molecular crystal intermolecular interaction gas adsorption chemical stability high-pressure resistance

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利用择形分子筛异构化亚甲基二苯胺

Chinese Journal of Catalysis 2024年第7期62卷 124-130页

作者： Sam Van Minnebruggen Ka Yan Cheung Trees De Baerdemaeker Niels Van Velthoven Matthias Degelin Galahad O’Rourke Hiroto toyoda Andree Iemhoff Imke Muller Andrei-Nicolae Parvulescu Torsten Mattke Jens Ferbitz 吴勤明肖丰收 Toshiyuki Yokoi Nils Bottke Dirk De Vos 巴斯夫股份有限公司膜分离、吸附、催化和光谱学可持续解决方案中心(cMACS) 比利时巴斯夫股份有限公司研究组德国东京工业大学纳米空间催化研究所横滨日本浙江大学化学系浙江杭州310028

亚甲基二苯胺(MDA)被广泛用作生产聚氨酯和聚异氰脲酸酯的中间体.然而,当前MDA的生产工艺在控制(4,4’/(2,4’+2,2’))异构体比例方面还存在局限.其中,4,4’-MDA被认为是最有价值的异构体.尽管2,4'-MDA在市场上也有一定的需求,但如果能... 详细信息

亚甲基二苯胺(MDA)被广泛用作生产聚氨酯和聚异氰脲酸酯的中间体.然而,当前MDA的生产工艺在控制(4,4’/(2,4’+2,2’))异构体比例方面还存在局限.其中,4,4’-MDA被认为是最有价值的异构体.尽管2,4'-MDA在市场上也有一定的需求,但如果能将其有效地转化为4,4'-MDA,将能显著提升其附加值.本文在使用苯胺的条件下,利用β分子筛等催化剂,通过双分子机制,可以选择性地将2,4'-MDA异构化为4,4'-MDA.尽管实验显示,多种酸性沸石具有较高的异构化活性,但MCM-68(具有MSE拓扑结构)的催化性能尤为出色,它不仅展现出高异构化活性,而且具有很好的选择性.MCM-68主要催化2,4'-MDA异构化为4,4'-MDA,而2,2'-MDA和低聚物的形成则可以忽略不计.本文还深入探讨了该择形作用的原因,并详细研究了酸位置在MSE分子筛孔道限制中的关键作用.

关键词：铝分布多相催化异构化亚甲基二苯胺聚氨酯择形

Formation and Annealing of BaTiO_3 and SrTiO_3 Nanoparticles in KOH Solution

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Journal of Materials Science & Technology 2010年第1期26卷 33-38页

作者： Tomoki Tsumura Keiichi Matsuoka Masahiro toyoda Department of Applied Chemistry Faculty of EngineeringOita University

Barium titanate （BaTiO3） and strontium titanate （SrTiO3） nanoparticles were synthesized separately through hydrothermal reaction of crystalline TiO2 particles and corresponding alkaline earth hydroxides, Ba（OH）2 and St（OH）2 respectively, in 50 mol·dm^-3 KOH solution at 150℃. Each structural evolution of BaTiO3 and SrTiO3 during the hydrothermal treatment was investigated by X-ray diffraction （XRD）, field emission scanning electron microscopy （FE-SEM）, field emission transmission electron microscopy （FE-TEM） and thermogravimetry- differential analysis （TG-DTA）. In the BaTiO3 system, round particles with cubic perovskite-type structure were obtained within 1 h. However, these particles were gradually dissolved and then were re-precipitated in the form of cube-shape BaTiO3 particles with a smaller lattice constant ac than that of the former phase. After the BaTiO3 particles formed firstly have disappeared completely, or the two phases coexistence stage with different lattice constant ac passed, lattice constant ac of BaTiO3 phase re-precipitated continuously decreased with annealing time. In contrast, once SrTiO3 particles are formed, the lattice constant ac decreased continuously throughout the reaction. The result indicates that SrTiO3 particles were annealed without dissolution and precipitation process under the present condition.

关键词： BaTiO3 SrTiO3 Nanoparticle Hydrothermal reaction

A new algorithm based on metaheuristics for data clustering

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第12期11卷 921-926页

作者： Tsutomu SHOHDOHJI Fumihiko YANO Yoshiaki toyoda Department of Computer and Information Engineering Faculty of EngineeringNippon Institute of Technology Division of Integrated Sciences J.F.Oberlin University Aoyama Gakuin University

This paper presents a new algorithm for clustering a large amount of *** improved the ant colony clustering algorithm that uses an ant’s swarm intelligence,and tried to overcome the weakness of the classical cluster analysis *** our proposed algorithm,improvements in the efficiency of an agent operation were achieved,and a new function "cluster condensation" was *** proposed algorithm is a processing method by which a cluster size is reduced by uniting similar objects and incorporating them into the cluster *** with classical cluster analysis methods,the number of steps required to complete the clustering can be suppressed to 1% or less by performing this procedure,and the dispersion of the result can also be ***,our clustering algorithm has the advantage of being possible even in a small-field cluster *** addition,the number of objects that exist in the field decreases because the cluster condenses;therefore,it becomes possible to add an object to a space that has become *** other words,first,the majority of data is put on *** are then clustered,gradually adding parts of the standby data to the clustering *** method can be adopted for a large amount of *** experiments confirmed that our proposed algorithm can theoretically applied to an unrestricted volume of data.

关键词： Metaheuristics Ant colony clustering Data clustering Swarm intelligence

Molecular mechanisms of transcription and replication of the influenza A virus genome

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Frontiers in Biology 2011年第6期6卷 446-461页

作者： Shijian ZHANG Tetsuya toyoda Shanghai Medical College of Fudan University Shanghai 200032China Choju Medical Institute Fukushimura Hospital19-14 AzanakayamaNoyori-choToyohashiAichi 441-8124Japan Infectious Disease Regulation Project Tokyo Metropolitan Institute of Medical Sciences1-6Kamikitazawa 2-chomeSetagaya-kuTokyo156-8506Japan

Influenza Avirus is one of the major pathogens that pose a large threat to human health worldwide and has caused *** A virus is the Orthomyxoviridae prototype,and has 8 segmented negative-sense singlestranded RNA(vRNA)as its *** virus RNA polymerase(RdRp)consists of three subunits PB2,PB1 and PA,and catalyzes both transcription and ***,intensive biochemical and structural analysis of its RdRp has been *** this paper,we review the details from the biochemical analysis of the purified influenza virus RdRp and the classical ribonucleoprotein complex,as well as piece together their structures to form an overall picture.

关键词： influenza virus RNA polymerase ribonucleoprotein complex transcription replication

Experimental investigation on cohesionless sandy bank failure resulting from water level rising

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International Journal of Sediment Research 2018年第1期33卷 47-56页

作者： Ryosuke Arai Kazuyuki Ota Takahiro Sato Yasushi toyoda Fluid Dynamics Sector Central Research Institute of Electric Power Industry

In the last decade, sediment replenishment forming cohesionless sandy banks below dams has become an increasingly common practice in Japan to compensate for sediment deficits downstream. The erosion process of the placed cohesionless sediment is a combination of lateral toe-erosion and the following mass failure. To explore cohesionless bank failure mechanisms, a series of experiments was done in a soil tank using a compacted sandy soil mass exposed to an increasing water level. Two types of uniform sand(D50= 0.40 mm and 0.17 mm) and two bank heights（50 cm and 25 cm） were used under the condition of a constant bank slope of 75°. The three dimensional（3D） geometry of the bank after failure was measured using a handheld 3D scanner. The motion of bank failure was captured using the particle image velocimetry（PIV） technique, and the matric suction was measured by tensiometers. The compacted sandy soil was eroded by loss of matric suction accompanying the rise in water level which subsequently caused rotational slide and cantilever toppling failure due to destabilization of the bank. The effect of erosion protection resulting from the slumped blocks after these failures is discussed in the light of different failure mechanisms. Tensile strength is analyzed by inverse calculation of cantilever toppling failure events. The tensile strength had non-linear relation with degree of saturation and showed a *** findings of the study show that it is important to incorporate the non-linear relation of tensile strength into stability analysis of cantilever toppling failure and prediction of tension crack depth within unsaturated cohesionless banks.

关键词： Riverbank erosion Matric suction Cohesionless bank Tensile strength

Conserved balance of hepatocyte nuclear DNA content in mononuclear and binuclear hepatocyte populations during the course of chronic viral hepatitis

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World Journal of Gastroenterology 2006年第28期12卷 4546-4548页

作者： Hidenori toyoda Takashi Kumada Olivier Bregerie Christian Brechot Chantal Desdouets Department of Gastroenterology Ogaki Municipal HospitalOgakiJapan Inserm U370-Pasteur Institute CHU NeckerParisFrance

AIM： TO analyze the percentages of hepatocytes with increased nuclear DNA content, i.e., tetraploid （4n） and octoploid （Sn） nuclei, and then compared mononuclear and binuclear hepatocyte populations： METHODS： The percentages of mononuclear diploid （2n）, 4n, and 8n hepatocytes and those of binuclear 2 × 2n, 2 × 4n, and 2 × 8n hepatocytes were determined with a method that can simultaneously measure hepatocyte nuclear DNA content and binuclearity in 62 patients with chronic hepatitis B or C. The percentage of 4n and 8n hepatocytes in the mononuclear hepatocyte population was compared with the percentage of 2 × 4n and 2 × 8n hepatocytes in the binuclear hepatocyte population. RESULTS： The percentages of 4n and 8n hepatocytes in mononuclear hepatocytes and 2 ×4n and 2 × 8n hepatocytes in binuclear hepatocytes were similar, regardless of the activity or fibrosis grade of chronic hepatitis and regardless of the infecting virus. CONCLUSION： The distribution of nuclear DNA content within mononuclear and binuclear hepatocyte populations was conserved during the course of chronic viral hepatitis.

关键词： Chronic viral hepatitis Hepatocyte binuclearity Hepatocyte ploidy Nuclear DNA content

Intracranial hemorrhage in patients treated with bevacizumab:Report of two cases

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World Journal of Gastroenterology 2011年第39期17卷 4440-4444页

作者： Takeshi Nishimura Makoto Furihata Hideyuki Kubo Masao Tani Senichiro Agawa Ryuhei Setoyama Tomikatsu toyoda Department of Surgery the Mutual Aid Association for Teachers and Officials Sanraku Hospital Department of Neurosurgery Tokyo Koseinenkin Hospital

Treatment with bevacizumab,an antiangiogenic agent,in patients with metastatic or unresectable colorectal cancer was approved less than 4 years ago in *** improves the survival of patients with metastatic colorectal cancer;however,it may lead to complications such as bleeding,which are sometimes *** should be administered only after careful consideration because the potential risks of therapy outweigh its ***,pharma-ceutical companies do not recommend bevacizumab therapy for patients with brain *** some reports support the cautious use of bevacizumab,others report that it is not always necessary to prohibit its use in patients with metastases to the central nervous system(CNS),including the ***,bevacizumab therapy in colorectal cancer patients with brain metastases is controversial,and it is unclear whether brainmetastases are a risk factor for intracranial hemor-rhage during anti-vascular endothelial growth factor(VEGF)*** report a 64-year-old man and a 65-year-old man with recurrent colorectal cancer with-out brain metastases;these patients developed multifocal and solitary intracranial hemorrhage,respectively,after the administration of *** findings suggest that intracranial hemorrhage can occur even if the patient does not have brain metastases prior to bevacizumab treatment and also suggest that brain metastases are not a risk factor for intracranial hemor-rhage with bevacizumab *** findings also question the necessity of excluding patients with brain metastases from clinical trials on anti-VEGF therapy.

关键词： Anti-vascular endothelial growth factor ther-apy Bevacizumab Central nervous system Colorectal cancer Intracranial hemorrhage