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An Electronic Approach to Materials Design

Journal of Materials Science & Technology 2003年第Z1期19卷 73-76页

作者： masahiko morinaga yoshinori murata hiroshi yukawa Department of Materials Science and Engineering Graduate School of Engineering Nagoya UniversityNagoya 464-8603 Japan Department of Materials Science and Engineering Graduate School of Engineering Nagoya UniversityNagoya 464-8603 Japan Department of Materials Science and Engineering Graduate School of Engineering Nagoya UniversityNagoya 464-8603 Japan

A molecular orbital approach to materials design has recently made great progress. This approach is based onthe electronic structure calculations by the DV-Xα cluster method. In this paper recent progress in this approachis reviewed. In particular, it is stressed that New PHACOMP approach is useful for predicting the formation oftopologically close-packed (TCP) phases (e.g., σ phase andμ phase ) in nickel based superalloys. Compared to thecurrent PHACOMP, New PHACOMP provides a better tool for designing those alloys which are free from such TCPprecipitates at service temperatures. In addition, the d-electrons concept is shown for alloy design and development.

关键词： High temperature materials, Ni based superalloys, Alloy design, Molecular orbital method

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Effects of age on survival and morbidity in gastric cancer patients undergoing gastrectomy

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World Journal of Gastrointestinal Oncology 2017年第6期9卷 257-262页

作者： yoshinori Fujiwara Shuichi Fukuda Masanori Tsujie Hajime Ishikawa Kotaro Kitani Keisuke Inoue Masao yukawa Masatoshi Inoue Department of Digestive Surgery Nara HospitalKindai University School of Medicine Department of Digestive Surgery Kawasaki Medical School

To evaluate clinicopathological features and surgical outcomes of gastric cancer in elderly and non-elderly patients after inverse probability of treatment weighting (IPTW) method using propensity score. METHODSWe enrolled a total of 448 patients with histologically confirmed primary gastric carcinoma who received gastrectomies. Of these, 115 patients were aged > 80 years old (Group A), and 333 patients were aged < 79 years old (Group B). We compared the surgical outcomes and survival of the two groups after IPTW. RESULTSPostoperative complications, especially respiratory complications and hospital deaths, were significantly more common in Group A than in Group B (P < 0.05). Overall survival (OS) was significantly lower in Group A patients than in Group B patients. Among the subset of patients who had pathological Stage I disease, OS was significantly lower in Group A (P < 0.05) than Group B, whereas cause-specific survival was almost equal in the two groups. In multivariate analysis, pathological stage, histology, and extent of lymph node dissection were independent prognostic values for OS. CONCLUSIONWhen the gastrectomy was performed in gastric cancer patients, we should recognized high mortality and comorbidities in that of elderly. More extensive lymph node dissection might improve prognoses of elderly gastric cancer patients.

关键词： Gastric cancer Mortality Morbidity Elderly Lymphadenectomy Propensity score matching Prognosis Survival

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基于锻造系统的弯曲件增量锻造

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锻压技术 2008年第3期33卷 1-3页

作者：王新云夏巨谌胡国安吉田佳典汤川伸树石川孝司华中科技大学材料成形与模具技术国家重点实验室湖北武汉430074 名古屋大学材料科学与工程系爱知名古屋464-8603

采用机器人与伺服压力机联动控制的方式,构建了锻造系统,在简单平面模具中进行长轴形棒材的弯曲成形试验。忽略金属的横向流动,推导出弯曲角度与压下次数及压下率之间的关系式。随后在锻造系统中进行了增量锻造试验,得到了弯曲形状试件... 详细信息

采用机器人与伺服压力机联动控制的方式,构建了锻造系统,在简单平面模具中进行长轴形棒材的弯曲成形试验。忽略金属的横向流动,推导出弯曲角度与压下次数及压下率之间的关系式。随后在锻造系统中进行了增量锻造试验,得到了弯曲形状试件。结果发现:在较高压下率和较多压下次数的情况下,试验结果与推导公式一致性较好;另外,更小的单次压下长度,可以得到更小的弯曲半径。

关键词：增量锻造锻造系统弯曲成形

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