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三轴加卸载下混凝土损伤特性及抗渗性能研究
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作者 杨福见 滕茂 +1 位作者 宋秋强 丁祥 《人民长江》 北大核心 2024年第2期195-202,共8页
地下跨江隧道混凝土衬砌在其服役期间会承受车辆等循环荷载的作用,导致混凝土衬砌产生不同程度的力学损伤,从而弱化了混凝土衬砌的抗渗性能。为此,针对高性能混凝土开展了三轴循环加卸载试验,研究了三轴循环加卸载全过程中高性能混凝土... 地下跨江隧道混凝土衬砌在其服役期间会承受车辆等循环荷载的作用,导致混凝土衬砌产生不同程度的力学损伤,从而弱化了混凝土衬砌的抗渗性能。为此,针对高性能混凝土开展了三轴循环加卸载试验,研究了三轴循环加卸载全过程中高性能混凝土变形及力学特性、力学损伤特性及抗渗性能演化规律及机制。研究结果表明:①循环加卸载引起的混凝土力学损伤随循环次数的增加而逐渐增大,并与塑性应变呈现出良好的指数形式演化关系。②循环加卸载下混凝土渗透率演化规律可分为稳定期、迅速增长期、缓慢变化期3个阶段,其中,围压水平对渗透率演化的第一阶段和第三阶段有明显的影响。③Logistic经验模型可以很好地描述混凝土渗透率与力学损伤之间呈现出的3阶段演化规律。研究结果有助于了解三轴循环加卸载全过程中高性能混凝土抗渗性能及力学损伤演化机制,同时可为确定不同应力水平下混凝土结构物力学损伤及抗渗性能提供参考。 展开更多
关键词 高性能混凝土 力学性能 抗渗性能 力学损伤 损伤演化模型 经验模型
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乡村振兴战略背景下农村小学教师专业发展问题及对策研究
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作者 滕茂 曾素芳 《四川职业技术学院学报》 2023年第5期24-28,共5页
党的十九大对乡村振兴作出了重要战略部署,强调乡村教育振兴是乡村振兴的重要组成部分。农村教育发展的重点在教师,因此,推动农村小学教师的专业发展,是确保农村基础教育质量、实现乡村振兴不可忽视的重要举措。然而,由于地理位置等方... 党的十九大对乡村振兴作出了重要战略部署,强调乡村教育振兴是乡村振兴的重要组成部分。农村教育发展的重点在教师,因此,推动农村小学教师的专业发展,是确保农村基础教育质量、实现乡村振兴不可忽视的重要举措。然而,由于地理位置等方面的原因,农村小学教育普遍存在师资流失快、教师职业认同感不强、知识结构单一、教研能力薄弱,系统培训不足、乡村情怀相对缺乏等问题,急需从宏观的政府层面、中观的学校层面和微观的教师个人层面三方形成合力,力促乡村振兴与农村小学教师的专业发展相互促进,形成良性互动。 展开更多
关键词 教师专业发展 农村小学教师 乡村振兴
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Lymph node dissection in esophageal carcinoma: Minimally invasive esophagectomy vs open surgery 被引量:13
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作者 Bo Ye Chen-Xi Zhong +4 位作者 Yu Yang Wen-Tao Fang teng mao Chun-Yu Ji Zhi-Gang Li 《World Journal of Gastroenterology》 SCIE CAS 2016年第19期4750-4756,共7页
AIM: To compare lymph node dissection results of minimally invasive esophagectomy(MIE) and open surgery for esophageal squamous cell carcinoma.METHODS: We retrospectively reviewed data from patients who underwent MIE ... AIM: To compare lymph node dissection results of minimally invasive esophagectomy(MIE) and open surgery for esophageal squamous cell carcinoma.METHODS: We retrospectively reviewed data from patients who underwent MIE or open surgery for esophageal squamous cell carcinoma from January 2011 to September 2014. Number of lymph nodes resected, positive lymph node(p N+) rate, lymph node sampling(LNS) rate and lymph node metastatic(LNM) rate were evaluated. R E S U LT S : A m o n g 4 4 7 p a t i e n t s i n c l u d e d, 1 2 3 underwent MIE and 324 underwent open surgery. The number of lymph nodes resected did not significantly differ between the MIE and open surgery groups(21.1 ± 4.3 vs 20.4 ± 3.8, respectively, P = 0.0944). The p N+ rate of stage T3 esophageal squamous cell carcinoma in the open surgery group was higher than that in the MIE group(16.3% vs 11.4%, P = 0.031), but no differences was observed for stages T1 and T2 esophageal squamous cell carcinoma. The LNS rate at left para-recurrent laryngeal nerve(RLN) site was significantly higher for open surgery than for MIE(80.2% vs 43.9%, P < 0.001), but no differences were noted at other sites. The LNM rate at left para-RLN site in the open surgery group was significantly higher than that in the MIE group, regardless of pathologic T stage. CONCLUSION: For stages T1 and T2 esophageal squamous cell carcinoma, the lymph node dissection result after MIE was comparable to that achieved by open surgery. However, the efficacy of MIE in lymphadenectomy for stage T3 esophageal squamous cell carcinoma, particularly at left para-RLN site, remains to be improved. 展开更多
关键词 ESOPHAGEAL cancer LYMPH NODE MINIMALLY INVASIVE Surgery
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CACA guidelines for holistic integrative management of esophageal carcinoma 被引量:1
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作者 Lei Gong Ming Bai +45 位作者 Liang Dai Xufeng Guo Xuefeng Leng Zhigang Li Zhihao Lu teng mao Qingsong Pang Lin Shen Yifeng Sun Hong Yang Jun Yin Hongdian Zhang Wencheng Zhang Gang Zhao Bin Zheng Yueyang Yang Yi Ba Chun Chen Haiquan Chen Longqi Chen Ting Deng Qingxia Fan Wentao Fang Xiangning Fu Jing Huang Xiaofei Li Yin Li Shuoyan Liu Yongyu Liu Jianqun Ma Weimin mao Jingli Ren Lijie Tan Peng Tang Lvhua Wang Qun Wang Wenqiang Wei Qi Xue Renquan Zhang Keneng Chen Jianhua Fu Junfeng Liu Yongtao Han Jie He Zhentao Yu Yousheng mao 《Holistic Integrative Oncology》 2023年第1期330-372,共43页
Esophageal carcinoma(EC)is a common malignant tumor of the upper digestive tract worldwide.An analysis of the latest data from cancer centers in China showed that the incidence of EC and the number of deaths due to EC... Esophageal carcinoma(EC)is a common malignant tumor of the upper digestive tract worldwide.An analysis of the latest data from cancer centers in China showed that the incidence of EC and the number of deaths due to EC in China in 2015 were 266,000 and 188,000,respectively,ranking sixth(6.3%)and fourth(8.0%)among all malignant tumors.The early diagnosis and treatment of EC and standardized diagnosis and treatment are important tasks for EC healthcare professionals in various centers across the country.At present,the 8th edition of the EC staging system jointly released by Union for International Cancer Control(UICC)and American Joint Committee on Cancer(AJCC)is the most recent,authoritative and widely used EC staging standard.The EC professional committee of the Chinese Anti-Cancer Association also organizes the"EC Standardization Campaign in China"every year to promote the development of EC diagnostic and treatment norms throughout the country.Since 2011,the EC Committee of the Chinese Anti-Cancer Association has published the Guidelines for Standardized Diagnosis and Treatment of EC.Considering the increasing number of EC clinical studies and the continuous progress in diagnostic and treatment technologies in recent years,the updated Guidelines will include the latest progress in the diagnosis and treatment of EC,with a goal of promoting the forward development of EC diagnosis and treatment in clinical practice. 展开更多
关键词 Esophageal cancer Clinical guideline Holistic integrative medicine
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Fibrin sealant for the prevention of anastomotic leakage after esophagectomy for esophageal or esophagogastric junction cancer:interim report of a prospective,phase III,randomized controlled study
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作者 Zerui Zhao Zhichao Li +6 位作者 Weizhao Huang Geng Wang teng mao Wenqiang Lv Lin Peng Jiyang Chen Hong Yang 《Holistic Integrative Oncology》 2023年第1期270-277,共8页
Purpose Anastomotic leakage(AL)is one of the most pernicious complications after esophagectomy for patients with esophageal or esophagogastric junction cancer(EC or EJC).The application of fibrin sealant(FS)may be adv... Purpose Anastomotic leakage(AL)is one of the most pernicious complications after esophagectomy for patients with esophageal or esophagogastric junction cancer(EC or EJC).The application of fibrin sealant(FS)may be advantageous for reducing the incidence of AL.This study aims to evaluate the safety and effectiveness of FS in preventing AL in patients undergoing McKeown esophagectomy.Methods In this multicenter,prospective,randomized controlled trial,we planned to recruit 360 patients aged 18–75 years with resectable EC or EJC and the interim analysis was performed when the number of participants reaches 180.Patients assigned to the FS group received McKeown esophagectomy with 2.5ml FS applied to the cervical anastomosis,while patients in the control group received surgery alone.The primary endpoint was the incidence of cervical AL within the first 3 months postoperatively.Result From February 2019 to November 2021,180 patients were recruited,with 89 in the FS group and 91 in the control group.There was no statistically difference between the incidence of AL between the two groups[6.7%(6/89)in the FS vs.14.3%(13/91)in the control group,P=0.16].Complications was comparable(P=0.76)between the FS group(42 of 89,47.2%)and the control group(45 of 91,49.5%).No adverse events related to FS or deaths occurred postoperatively.Conclusion The application of FS intraoperatively is feasible and does not increase the risk of complications,and its effectiveness for the prevention of AL needs to be revalidated after the completion of patient enrollment.Trial registration This trial was registered at ClinicalTrials.gov(NCT03847857)on February 19th,2019. 展开更多
关键词 Esophageal cancer McKeown esophagectomy Fibrin sealant Anastomotic leakage Postoperative complications
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