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数据分析与知识发现 2019年第7期3卷 14-22页

作者：李柯佐々木勇和南京大学信息管理学院南京210046 大阪大学大学院情报科学研究科大阪565-0871

【目的】构建基于多维小波聚类的空间文本数据情感分析模型,实现文本情感和空间位置的综合分析。【方法】将Yelp数据集进行整合以构建空间文本数据库,使用基于词典的情感分析方法构建特征向量。提出使用多维小波聚类的混合算法和文本–... 详细信息

【目的】构建基于多维小波聚类的空间文本数据情感分析模型,实现文本情感和空间位置的综合分析。【方法】将Yelp数据集进行整合以构建空间文本数据库,使用基于词典的情感分析方法构建特征向量。提出使用多维小波聚类的混合算法和文本–空间算法两种模型并进行分析。【结果】实验结果验证了使用db2和bior2.2小波基函数的多维小波聚类算法比DBSCAN和K-means算法在空间文本数据挖掘中能识别出更精确的聚类集合,且在十万级至千万级数据聚类中速度最佳。【局限】情感分析部分使用一元语言模型,缺乏对语句层面意义的分析。【结论】本文所提文本–空间算法模型能有效挖掘多维空间文本数据的情感倾向分布;混合算法模型为空间文本数据推荐系统提供了同时计算空间接近性和情感相似性的有效方案。

关键词：空间文本数据情感分布分析小波变换聚类

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Case of plasmablastic lymphoma of the sigmoid colon and literature review

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World Journal of Gastroenterology 2015年第24期21卷 7598-7603页

作者： Tomoko Haramura Masashi Haraguchi Junji Irie Shinichiro Ito Hirotaka Tokai Kazumasa Noda Masachika Kitajima Shigeki Minami Keiji Inoue yuya sasaki Koichi Oshima Susumu Eguchi Department of Surgery Nagasaki Harbor Medical Center City Hospital Department of Pathology Nagasaki Harbor Medical Center City Hospital Department of Pathology Kurume University Department of Surgery Nagasaki University Graduate School of Biomedical Sciences

Plasmablastic lymphoma(PBL) is a rare form of nonHodgkin's lymphoma that is associated with human immunodeficiency virus(HIV) infection. Although PBL is most commonly observed in the oral cavity of HIV-positive patients, it can also be observed at extra-oral sites in HIV-negative patients. This report represents an unusual case of HIV-negative PBL that occurred in the sigmoid colon. This patient had a history of systemic lupus erythematosus and an underlying immunosuppressive state from long term steroid therapy. The lymphoma cells were positive for CD138, kappa light chain restriction and Epstein-Barr virus and negative for CD20/L26, CD3, CD79 a, UCHL1(CD45RO) and cytokeratin(AE1/AE3). The patient died approximately 2 mo after the operation. In the present paper, we review cases of PBL of the colon in HIVnegative patients.

关键词： Plasmablastic lymphoma Sigmoid colon Humanimmunodeficiency virus-negative Immunosuppressive state Extra-oral site

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Local recurrence after successful endoscopic submucosal dissection for rectal mucinous mucosal adenocarcinoma:A case report

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World Journal of Gastrointestinal Oncology 2023年第1期15卷 186-194页

作者： Yuki Murakami Hiroki Tanabe Yusuke Ono yuya Sugiyama Yu Kobayashi Takehito Kunogi Takahiro sasaki Keitaro Takahashi Katsuyoshi Ando Nobuhiro Ueno Shin Kashima Sayaka Yuzawa Kentaro Moriichi Yusuke Mizukami Mikihiro Fujiya Toshikatsu Okumura Division of Metabolism and Biosystemic Science Department of Gastroenterology and Hematology/OncologyDepartment of MedicineAsahikawa Medical UniversityAsahikawa 078-8510HokkaidoJapan Institute of Biomedical Research Sapporo-Higashi Tokushukai HospitaSapporo 065-0033HokkaidoJapan Department of Diagnostic Pathology Asahikawa Medical UniversityAsahikawa 078-8510HokkaidoJapan

BACKGROUND Mucinous adenocarcinoma of the colorectum is a rare histological subtype characterized by an abundant mucinous *** tumors are frequently diagnosed at an advanced stage,which indicates an aggressive ***,few case reports have been published,and little information is available concerning genetic alterations in mucinous *** SUMMARY A 76-year-old man underwent en bloc endoscopic submucosal dissection(ESD)for the management of a type 0-Is+IIa *** examination revealed an intramucosal mucinous adenocarcinoma with signet-ring cell carcinoma and well-to-moderately differentiated tubular *** years after the ESD,local recurrence was detected by an endoscopic examination,revealing a new 0-Is+IIa lesion with a phenotype similar to the previously resected ***-ESD was chosen for the management of the recurrent tumor,and the histological examination showed positive tumor infiltration at the vertical *** surgical resection was performed for the curative *** analysis showed pathogenic alterations in RNF43 and TP53 in the adenoma and an additional SMAD4 alteration in the *** This mucinous mucosal adenocarcinoma case was suggested to have an aggressive phenotype and a careful and close follow-up are required.

关键词： Rectal cancer Mucinous adenocarcinoma Endoscopic submucosal dissectio TP53 Colitic cancer pathway Case report

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Maps of International Research Collaboration in Clean Energy

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Journal of Energy and Power Engineering 2013年第3期7卷 480-490页

作者： Ichiro Sakata Hajime sasaki Hiroko Nakamura yuya Kajikawa Todai Policy Alternatives Research Institute The University of Tokyo Tokyo 113-0011 Japan Innovation Poliey Research Center Institute for Engineering Innovation The University of Tokyo Tokyo 113-8656 Japan

Clean energy is the most promising technology for sustainable growth. The development of clean energy requires a considerable amount of R & D (research & development) expenditure and various core technologies, and therefore, international research collaboration is necessary for prompt and efficient development. The study is aimed at establishing a knowledge base that can help to prepare international research collaboration policies for solving global challenges effectively. The authors demonstrate the research capacity and international research collaboration in solar cell and fuel cell technologies, using global research network diagrams gathered from 35,322 and 33,136 academic papers, respectively. The diagrams include the data of research competency and co-authorship. More than 6,000 institutions and 100 countries are involved in each field. Based on the diagrams, the technologies are compared and international collaboration is analyzed. A valley of research collaboration in Asia is identified for both technologies. Then, science and education policies that influence the structures are discussed.

关键词：国际合作能源领域燃料电池技术地图清洁能源研究能力太阳能电池持续增长

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