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基于有限元分析的可循环拉链邮袋仿真模拟研究

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包装工程 2022年第15期43卷 234-240页

作者：董迪邮政科学研究规划院有限公司北京100096 中国邮政集团有限公司邮政研究中心北京100096

目的设计质量、强度满足使用的可循环拉链邮袋,代替一次性邮袋,实现绿色发展理念。方法设计可循环拉链邮袋结构,基于有限元分析模拟拉链邮袋实际应用中真实物理系统。分析拉链邮袋在材质、夹具固定方式、负载3种影响因素下的应力、应变... 详细信息

目的设计质量、强度满足使用的可循环拉链邮袋,代替一次性邮袋,实现绿色发展理念。方法设计可循环拉链邮袋结构,基于有限元分析模拟拉链邮袋实际应用中真实物理系统。分析拉链邮袋在材质、夹具固定方式、负载3种影响因素下的应力、应变、变形情况,比较仿真结果,确定可循环拉链邮袋材质并验证。结果不同材质下,涤纶树脂(PET)变形量较小,高密度聚乙烯(HDPE)次之,聚丙烯(PP)变形量较大。不同固定方式下,袋口两短边夹具固定,袋口应力较集中,最大位移和应变较大,袋口四边夹具固定袋口变形较小、应力较小。不同负载下,负载与应力、位移、应变三者变化呈正相关,最大应力、位移、应变出现的位置较为稳定。结论借助有限元分析模拟拉链邮袋实际应用中受力情况,分析不同材质、夹具固定方式、负载情况下,可循环拉链邮袋力学性能,节省人力、物力,为实际应用提供依据,同时,证明了涤纶树脂(PET)可应用于可循环拉链邮袋的制作,为绿色、环保、可降解、可循环拉链邮袋的制作奠定基础,对限塑、绿色发展有着重要的意义。

关键词：可循环拉链邮袋有限元分析应力应变仿真模拟

Normal Forms of Symplectic Matrices

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Acta Mathematica Sinica,English Series 2000年第2期16卷 237-260页

作者： Yiming Long Nankai Institute of Mathematics.Nankai University,Tianjin 300071,P.R.China di dong Department of Mathematics.SUNY at Stony Brook,Stony Brook,NY 111794-3651,USA Associate Member of the ICTP Nankai Institute of Mathematics Nankai University Tianjin 300071 P. R. China Department of Mathematics SUNY at Stony Brook Stony Brook NY 111794-3651 USA

In this paper,we prove that for every symplectic matrix M possessing eigenvalues on the unit circle,there exists a symplectic matrix P such that P-1 MP is a symplectic matrix of the normal forms defined in this paper.

关键词： Normal form Symplectic matrix Eigenvalue Symplectic transformation

Role of yttrium content in twinning behavior of extruded Mg−Y sheets under tension/compression

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Transactions of Nonferrous Metals Society of China 2022年第11期32卷 3534-3549页

作者： Yan-qin CHAI dong-di YIN Shen HUA Guang-hao HUANG Hao ZHOU Jiang ZHENG Qu-dong WANG Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Nano and Heterogeneous Materials Center School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China Shenyang National Laboratory for Materials Science International Joint Laboratory for Light Alloys(Ministry of Education)College of Materials Science and EngineeringChongqing UniversityChongqing 400044China National Engineering Research Center of Light Alloys Net Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The influence of Y content on the grain-scale twinning behavior in extruded Mg−xY(x=0.5,1,5,wt.%)sheets under uniaxial tension and compression along the extruded direction was statistically *** automatic twin variant analysis was employed,based on large data sets obtained by electron backscatter diffraction(EBSD),including 2691 grains with 977 ***{1012}tension twinning(TTW)dominance and prevailing anomalous twinning behavior(Schmid factor(m)ding,indicating a promoted stochasticity of twin variant selection for more concentrated Mg−Y ***,the trend for the Y-content dependent anomalous twinning behavior was opposite in *** fractions of the anomalous TTWs were found to be well correlated with the maximum Schmid factor(m_(max))values of basal slip and prismatic slip in the corresponding parent grains for compression and tension,respectively,indicating that twinning and dislocation slip might be closely related in the present Mg−Y alloys.

关键词： Mg−RE alloys deformation twinning twin variant selection Schmid factor anomalous twin

Isolated synchronous Virchow lymph node metastasis of sigmoid cancer: A case report

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World Journal of Clinical Cases 2021年第32期9卷 9917-9925页

作者： Jian-Qiao Yang Liang Shang Le-Ping Li Hai-Yan Jing Kang-di dong Jian Jiao Chun-Shui Ye Hui-ChengRen Qin-Feng Xu Ping Huang Jin Liu Cheeloo College of Medicine Shandong UniversityJinan 250000Shandong ProvinceChina Department of Gastroenterological Surgery Shandong Provincial HospitalJinan 250000Shandong ProvinceChina Department of Gastrointestinal Surgery Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250000Shandong ProvinceChina Department of Gastrointestinal Surgery Shandong Provincial HospitalCheeloo College of MedicineShandong UniversityJinan 250000Shandong ProvinceChina Key Laboratory of Engineering of Shandong Province Shandong Provincial HospitalJinan 250000Shandong ProvinceChina Department of Pathology Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250000Shandong ProvinceChina Department of Gastroenterological Surgery Shandong Provincial HospitalShandong First Medical UniversityJinan 250000Shandong ProvinceChina Department of General Surgery Huaiyin Hospital Affiliated to Shandong Provincial HospitalJinan 250000Shandong ProvinceChina Department of Gastroenterology Shandong Provincial Hospital Shandong Affiliated to First Medical UniversityJinan 250000Shandong ProvinceChina Research Center for Experimental Nuclear Medicine School of Basic Medical SciencesShandong UniversityJinan 250021Shandong ProvinceChina

BACKGROUND Colorectal cancer(CRC)is one of the most common malignant tumors of the digestive *** metastases of this tumor are mostly confined to the regional lymph nodes,and distant supraclavicular lymph node metastases are very *** SUMMARY In this report,we describe a patient with sigmoid carcinoma and isolated synchronous supraclavicular lymph node metastases.A 56-year-old male presented with a left cervical mass that was confirmed as a lymph node metastasis from sigmoid cancer by several auxiliary *** 6 cycles of chemotherapy with the 5-fluorouracil,leucovorin and oxaliplatin+cetuximab regimen,the sigmoid colon tumor and Virchow’s lymph node metastasis were significantly smaller than before treatment,and no new metastatic sites were *** the effects of chemotherapy on quality of life,resection of the primary tumor was performed followed by 4 cycles of chemotherapy with the original chemotherapy ***’s lymph node dissection was selected by mutual consultation between the patient and *** the second surgery,the patient received capecitabine and cetuximab chemotherapy and did not experience recurrence or metastasis during *** In conclusion,supraclavicular lymph node metastasis without any other solid organ metastasis is a potential metastatic pathway for *** addition,after resection of the primary lesion,postoperative chemotherapy combined with supraclavicular lymph node dissection is feasible for the treatment of patients with CRC and isolated synchronous Virchow’s lymph node metastases.

关键词： Virchow’s lymph node Metastasis Colorectal cancer Case report

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老枪

山花 2009年第17期 89-96页

作者：第代着冬

在东边层叠的群山之上,幽蓝的天际裂开一道缝隙,一缕金色的霞光倾泻下来,像抖动的绸缎漾起大片光明。光芒所及,木耳寨浮出四野的沉默。牛铃声中,鸟雀亮开嗓子,大地从松弛中苏醒。炊烟长出屋顶,像一棵大树,接着长成一朵蘑菇,慢慢连成一片。

关键词：林树生火药枪酸枣树

基于DSpace构建传统蒙古文学科机构知识库平台

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计算机工程与科学 2010年第10期32卷 139-141,149页

作者：狄冬梅内蒙古大学图书馆内蒙古呼和浩特010021

本文主要阐述了基于DSpace构建传统蒙古文学科机构知识库的难点以及解决的技术路线,包括蒙古文数字资料的采集、存储、检索以及显示等。针对蒙古文的构词和语法等方面的特点,对开源搜索引擎Lucene进行改进——采用B树管理Term、简化了... 详细信息

本文主要阐述了基于DSpace构建传统蒙古文学科机构知识库的难点以及解决的技术路线,包括蒙古文数字资料的采集、存储、检索以及显示等。针对蒙古文的构词和语法等方面的特点,对开源搜索引擎Lucene进行改进——采用B树管理Term、简化了特征词权值的计算、采用EC方法确定了蒙古文停用词表,实现了基于Lucene的蒙古文检索。

关键词：机构知识库 DSpace 蒙古文

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基于ARM技术的小电流故障选线装置

电力系统保护与控制 2009年第3期37卷 64-68页

作者：董迪齐郑杨以涵华北电力大学电气与电子工程学院北京102206

根据故障选线的准确性和快速性对硬件系统的要求,提出了一种基于ARM(Advanced RISC Machines)技术的软硬件平台。装置采用32位嵌入式ARM微处理器LPC2214作为装置的控制核心。为提高选线方法适应性,软件算法将多种选线方法结合在一起,运... 详细信息

根据故障选线的准确性和快速性对硬件系统的要求,提出了一种基于ARM(Advanced RISC Machines)技术的软硬件平台。装置采用32位嵌入式ARM微处理器LPC2214作为装置的控制核心。为提高选线方法适应性,软件算法将多种选线方法结合在一起,运用模糊理论实现综合决策,得到综合智能选线结果。该平台充分利用了ARM处理器出色的实时中断响应和快速的运算速度,很好地实现了综合智能选线算法。现场运行结果表明,该装置运行稳定,选线快速可靠,适应性强,具有良好的性价比,是小电流接地系统中一种实用的选线装置。

关键词： ARM 小电流接地系统故障选线综合选线故障录波

The Applications of Artificial Intelligence in digestive System Neoplasms:A Review

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Health Data Science 2023年第1期3卷 1-16页

作者： Shuaitong Zhang Wei Mu di dong Jingwei Wei Mengjie Fang Lizhi Shao Yu Zhou Bingxi He Song Zhang Zhenyu Liu Jianhua Liu Jie Tian School of Engineering Medicine Beihang UniversityBeijingChina. Key Laboratory of Big Data-Based Precision Medicine Beihang UniversityMinistry of Industry and Information TechnologyBeijingChina. CAS Key Laboratory of Molecular Imaging Institute of AutomationChinese Academy of SciencesBeijingChina. Department of Oncology Guangdong Provincial People's Hospital/Second Clinical Medical College of Southern Medical University/Guangdong Academy of Medical SciencesGuangzhouGuangdongChina.

Importance:digestive system neoplasms(DSNs)are the leading cause of cancer-related mortality with a 5-year survival rate of less than 20%.Subjective evaluation of medical images including endoscopic images,whole slide images,computed tomography images,and magnetic resonance images plays a vital role in the clinical practice of DSNs,but with limited performance and increased workload of radiologists or *** application of artificial intelligence(AI)in medical image analysis holds promise to augment the visual interpretation of medical images,which could not only automate the complicated evaluation process but also convert medical images into quantitative imaging features that associated with tumor ***:We briefly introduce the methodology of AI for medical image analysis and then review its clinical applications including clinical auxiliary diagnosis,assessment of treatment response,and prognosis prediction on 4 typical DSNs including esophageal cancer,gastric cancer,colorectal cancer,and hepatocellular ***:AI technology has great potential in supporting the clinical diagnosis and treatment decision-making of *** technical issues should be overcome before its application into clinical practice of DSNs.

关键词： diagnosis neoplasms holds

Emergent management of penetrating trauma of aortic arch in a countryside hospital

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Chinese Journal of Traumatology 2011年第2期14卷 114-116页

作者： di dong-mei ZHANG Xiao-ying JING Huo-jun Department of Cardiovascular Surgery Third Affiliated Hospital of Suzhou University Changzhou 213003 Jingtan Chinese Medicine Hospital Jingtan 213200 Jiangsu Province China

According to the literature, only a small proportion of occurrences regarding penetrating trauma of the thoracic aorta can be treated successfully. Herein we reported our experience of a recent rescue of such a patient in a countryside hospital lacking advanced instruments for cardiopulmonary bypass operations. A 20-year-old male was admitted for a penetrating injury with disrupted innominate vein and right common carotid artery together with a 1.5-cm laceration on the aortic arch between the innominate artery and the left common carotid artery. The patient was successfully saved without the implementation of cardiopulmonary bypass. Presentation and management in this case were discussed.

关键词： Aorta, thoracic Wounds, stab Hospitals