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LNG管道裂纹缺陷产生原因分析及安全评估

化工机械 2024年第2期51卷 304-309页

作者：张晓兵宋宗杰王涛梁妍王俊强国家市场监管技术创新中心(油气管道与储存设备安全领域) 中国特种设备检测研究院国家管网集团北海液化天然气有限责任公司

对LNG管道在检维修期间发现的裂纹超标缺陷进行了裂纹形成原因推断分析,针对裂纹缺陷的成因提出了裂纹缺陷潜在的失效模式,并进行了基于一次成型裂纹的断裂与塑性失效安全评价和基于疲劳裂纹扩展失效的安全评价,对含裂纹缺陷LNG管道的... 详细信息

对LNG管道在检维修期间发现的裂纹超标缺陷进行了裂纹形成原因推断分析,针对裂纹缺陷的成因提出了裂纹缺陷潜在的失效模式,并进行了基于一次成型裂纹的断裂与塑性失效安全评价和基于疲劳裂纹扩展失效的安全评价,对含裂纹缺陷LNG管道的后续运行提供了处理建议,为相似类型的管道裂纹超标缺陷的安全评价和处理提供参考。

关键词： LNG管道裂纹断裂失效疲劳失效安全评价

生成式人工智能辅助混合式教学在实习护生皮内针技术感染预防教学中的应用

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护理学报 2024年第18期31卷 21-25页

作者：胡杏娟张伦高钰琳高春凤陈妙燕李晓君陈烯琳洪笃云梁业基广东省第二中医院脾胃病科广东广州510095 广东省第二中医院感染管理科广东广州510095 广东省第二中医院针灸康复科广东广州510095 广东省第二中医院药学部广东广州510095 广州中医药大学第五临床医学院广东广州510000 南方医科大学护理学院广东广州510515 香港浸会大学中医药学院中国香港999077

目的探讨生成式人工智能辅助混合式教学在实习护生皮内针技术感染预防教学中的应用效果。方法采用便利抽样法,选取60名本院实习护生,按照进入临床顺序将实习护生分为对照组30例,试验组30例。对照组采用理论授课和操作示范练习、技术实... 详细信息

目的探讨生成式人工智能辅助混合式教学在实习护生皮内针技术感染预防教学中的应用效果。方法采用便利抽样法,选取60名本院实习护生,按照进入临床顺序将实习护生分为对照组30例,试验组30例。对照组采用理论授课和操作示范练习、技术实践结合案例分析传统教学法,试验组在传统教学的基础上,采用生成式人工智能辅助混合式教学法。教学干预10学时后测量2组实习护生的自主学习能力、皮内针技术感染预防理论考试及实践能力考核成绩、实习护生对教学方法满意度。结果教学干预10学时后,试验组实习护生自主学习能力、皮内针技术感染预防理论考试及实践能力考核成绩、实习护生对教学方法满意度均高于对照组,差异有统计学意义(P<0.05)。结论生成式人工智能辅助混合式教学法应用于皮内针技术感染预防临床教学,培养了实习护生自主学习能力,提高皮内针技术感染预防知识和操作技能水平,增加实习护生对带教老师的教学满意度。

关键词：生成式人工智能皮内针技术感染预防混合式教学实习护生

Childhood maltreatment and suicide ideation: A possible mediation of social support

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World Journal of Psychiatry 2022年第3期12卷 483-493页

作者： Roland Donald Ahouanse Wei Chang Hai-Liang Ran Die Fang Yu-San Che Wen-Hang Deng Si-Fan Wang jun-Wei Peng lin Chen Yuan-Yuan xiao Department of Epidemiology and Health Statistics School of Public HealthKunming Medical UniversityKunming 650500Yunnan ProvinceChina

BACKGROUND Existing literature suggests a positive link between childhood maltreatment(CM)and suicide ideation(SI).Nevertheless,whether social support significantly mediates this association remains *** To investigate whether social support significantly mediates the association between CM and *** In this cross-sectional study of 4732 adolescents from southwest China,we intended to discuss the association between CM and multiple types of *** addition,the mediation of major types of social support in this association was also investigated.A self-administrated questionnaire was used to collect the data.A series of multivariate logistic regression models were employed to estimate the association between different types of CM,social support,and *** possible mediation of social support in the association between CM and SI was assessed using the path *** Based on the cutoffs for subscales of Childhood Trauma Questionnaire,928(19.61%),1269(26.82%),595(12.57%),2337(49.39%),and 3067(64.81%)respondents reported physical abuse,emotional abuse,sexual abuse,physical neglect,and emotional neglect,*** all the social sources,parental support presented as a significant mediator in the association between emotional maltreatment,both abuse and neglect,and all three types of SI:1-wk,1-year,and *** social support mediated 5.31%and 29.23%,4.80%and 24.50%,and 7.04%and 44.42%of the overall emotional abuse-SI and emotional neglect-SI associations,*** Our findings suggest that improving parental social support might be effective in preventing suicidal risk related to childhood emotional maltreatment in adolescents.

关键词： Adolescent Childhood maltreatment Suicide ideation Mediation Social support

《患者安全课程思政教学指南》的编制及初步应用

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中华护理教育 2024年第1期21卷 17-21页

作者：刘彤王俊赵庆华陈恒英李娟李跃荣周鹭翟海魂肖明朝重庆医科大学护理学院重庆市400016 重庆护理职业学院思想政治理论课教学研究部重庆市402763 河北医科大学党委办公室石家庄市050011

目的设计及编制《患者安全课程思政教学指南》,并探讨其初步应用效果。方法以重庆医科大学患者安全课程建设为基础,以教育部《医学人文课程思政教学指南编写要求》为依据,组建编制团队,基于文献研究、专题讨论构建指南初稿,经12名专家... 详细信息

目的设计及编制《患者安全课程思政教学指南》,并探讨其初步应用效果。方法以重庆医科大学患者安全课程建设为基础,以教育部《医学人文课程思政教学指南编写要求》为依据,组建编制团队,基于文献研究、专题讨论构建指南初稿,经12名专家论证后修改完善指南内容,形成《患者安全课程思政教学指南》。在2022年秋学期开课时随机选取2个小班的三年级护理本科生(n=80)应用该指南进行教学,在课程结束时采用问卷调查课程思政教学满意度;同时开展教师座谈会,讨论应用该指南进行授课的教学感受及对该指南的评价反馈。结果《患者安全课程思政教学指南》分为总论、各章节课程思政教学指南、附录3个部分;绝大部分学生对应用该指南教学表示满意;15名授课教师对该指南均持肯定态度,认为其具有较高的操作性、实用性和科学性,提出需加强思政元素挖掘、开展素材选取方面的培训等建议。结论编制的《患者安全课程思政教学指南》内容全面,科学、合理且具有可行性,能够为授课教师提供从理论原则、实际教学到评估评价的全程教学指导与参考;在教学实践中得到了验证,获得了学生和教师的一致好评。

关键词：患者安全课程思政教学指南医学人文素养

Haploidentical stem cell transplantation in patients with chronic myelomonocytic leukemia

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Science China(Life Sciences) 2020年第8期63卷 1261-1264页

作者： Yu-Qian Sun Chen Zhao Yu Wang Chen-Hua Yan xiao-Hui Zhang Lan-Ping Xu Kai-Yan Liu xiao-jun Huang Peking University People’s Hospital Peking University Institute of HaematologyNational Clinical Research Center for Hematologic diseaseBeijing Key Laboratory of Haematopoietic Stem Cell TransplantationBeijing 100044China Peking-Tsinghua Centre for Life Sciences Beijing 100871China

Dear Editor,Chronic myelomonocytic leukemia (CMML) is a rare clonal hematological malignancy with both myelodysplastic and myeloproliferative features. Patients with CMML have a very poor prognosis。

关键词： leukemia prognosis patients

Responses of Agronomic Benefit and Soil Quality to Better Management of Nitrogen Fertilizer Application in Greenhouse Vegetable Land

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Pedosphere 2012年第5期22卷 650-660页

作者： JIANG Hui-Min ZHANG Jian-Feng SONG xiao-Zong LIU Zhao-Hui JIANG Li-Hua YANG jun-Cheng Ministry of Agriculture Key Laboratory of Crop Nutrition and Fertilization Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081(China) Institute of Agricultural Resources and Environment Shandong Academy of Agricultural SciencesJinan 250100(China)

As a result of intensive greenhouse vegetable production in northern China, the potential risk of nitrogen （N） fertilizer over-applied is increasingly apparent and is threatening ecosystem and the sustainability of food production. An experiment was carried out in Shouguang, Shangdong Province, China to evaluate agronomic benefit and soil quality under different N applications, including the conventional chemical N rate （1000 kg N ha^（-1） season^（-1）, N1）, 70% of N1 （N2）, 70% of N1 ＋ maize straw （N3）, 50% of N1 ＋ maize straw ＋ drip irrigation （N4）, and 0% of N1 （NO）, during two successive growing seasons of autumn-winter （AW） and winter-spring （WS）. The maximum yields for N4 were 1.1 and 1.0 times greater than those for N1 in the AW and WS seasons, respectively. N agronomic efficiency （AEN） and apparent N recovery efficiency （REN） were greatest with the N4. A significant relationship was found between soil NO3-N content and electrical conductivity （EC）（R^2 = 0.61 in the AW season and R^2= 0.29 in the WS season）. Reducing N fertilizer decreased soil NO3-N accumulation （20.9%-37.8% reduction in the AW season and 11.7%-20.1% reduction in the WS season） relative to the accumulation observed for N1 within the 0-100 cm soil layer. Soil urease and invertase activities were not significantly different among N treatments. The N4 treatment would be practical for reducing excess N input and maintaining the sustainability of greenhouse-based intensive vegetable systems in Shouguang.

关键词： maize straw N use efficiency soil enzyme soil NO3-N accumulation tomato yields

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基于压缩感知的多跳地震数据采集技术与方法

地球物理学报 2017年第11期60卷 4194-4203页

作者：林君张晓普王俊秋龙云吉林大学仪器科学与电气工程学院长春130021 地球信息探测仪器教育部重点实验室长春130021

随着油气地震勘探目标的复杂程度日益提高,地震数据采集系统的道容量也需要得到进一步的提升.本文根据压缩感知、稀疏表示等理论,提出了一种多跳恒传输量的数据采集框架,以减少每条测线上地震数据的传输量,进而提升采集系统的道容量.为... 详细信息

随着油气地震勘探目标的复杂程度日益提高,地震数据采集系统的道容量也需要得到进一步的提升.本文根据压缩感知、稀疏表示等理论,提出了一种多跳恒传输量的数据采集框架,以减少每条测线上地震数据的传输量,进而提升采集系统的道容量.为了能够明显地提高带道能力,设计了基于有序并行原子更新的字典学习算法,该算法能够在计算量较小的前提下有效的得到相应数据的稀疏变换矩阵.基于压缩感知的多跳地震数据采集方法已能够在吉林大学研制的无缆自定位地震仪中实现.本文最后使用一组仿真数据和一组实测数据进行测试,其结果表明,数据采集信噪比控制在14 dB以上(引入噪声约18%)时,最多可以将系统的道容量提高3倍以上.

关键词：地震数据采集道容量压缩感知稀疏性字典学习算法

Transarterial chemoembolization with hepatic arterial infusion chemotherapy plus S-1 for hepatocellular carcinoma

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World Journal of Gastroenterology 2020年第27期26卷 3975-3988页

作者： Jian-Hai Guo Shao-Xing Liu Song Gao Fu-Xin Kou Xin Zhang Di Wu xiao-Ting Li Hui Chen xiao-Dong Wang Peng Liu Peng-jun Zhang Hai-Feng Xu Guang Cao lin-Zhong Zhu Ren-Jie Yang Xu Zhu Department of Interventional Therapy Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing)Peking University Cancer Hospital and InstituteBeijing 100142China Department of Radiology Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing)Peking University Cancer Hospital and InstituteBeijing 100142China

BACKGROUND Transarterial chemoembolization(TACE)and hepatic arterial infusion chemotherapy(HAIC)have shown promising local benefits for advanced hepatocellular carcinoma(HCC).S-1,a composite preparation of a 5-fluorouracil prodrug,has proven to be a convenient oral chemotherapeutic agent with definite efficacy against advanced *** To evaluate the efficacy and safety of TACE followed by HAIC with or without oral S-1 for treating advanced *** In this single-center,open-label,prospective,randomized controlled trial,117 participants with advanced HCC were randomized to receive TACE followed by oxaliplatin-based HAIC either with(TACE/HAIC+S-1,n=56)or without(TACE/HAIC,n=61)oral S-1 between December 2013 and September *** participants were excluded from final analysis for withdrawing *** primary endpoint was progression-free survival(PFS)and secondary endpoints included overall survival(OS),objective response rate,disease control rate and *** In total,115 participants(100 males and 15 females;mean age,57.7 years±11.9)were *** median PFS and OS were 5.0 mo(0.4–58.6 mo)(95%confidence interval(CI):3.82 to 6.18)vs 4.4 mo(1.1–54.4 mo)(95%CI:2.54 to 6.26;P=0.585)and 8.4 mo(0.4–58.6 mo)(95%CI:6.88 to 9.92)vs 8.3 mo(1.4–54.4 m)(95%CI:5.71 to 10.96;P=0.985)in the TACE/HAIC+S-1 and TACE/HAIC groups,*** objective response rate and disease control rate were 30.9%vs 18.4%and 72.7%vs 56.7%in the TACE/HAIC+S-1 and TACE/HAIC groups,*** 3/4 adverse events had a similar frequency in both treatment *** No improvements in tumor response rates,PFS or OS were observed with the addition of S-1 to TACE/HAIC in advanced *** treatment regimens had a similar safety profile.

关键词： Hepatocellular carcinoma Advanced Hepatic arterial infusion chemotherapy Transarterial chemoembolization Prognosis Efficacy

浅谈柴油机WHSC冷热起动测试循环排放及后处理效果的变化

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内燃机与配件 2024年第3期 6-9页

作者：孟令楠李永君许文海王勇骆海宁肖俊解永全青海省高原科技发展有限公司青海西宁810006 西宁市高原机动车检测有限责任公司青海西宁810000 青海省内燃动力机械高原动力及排放重点实验室青海西宁810006

研究起动工况排放特性对于进一步减少气体污染物排放具有重要意义。本文基于2 206m高海拔发动机试验台架对配有DOC+DPF+SCR+ASC尾气净化装置(以下简称后处理)的某国六柴油机进行WHSC试验循环,分析了柴油机在冷热起动工况下的原始排放和... 详细信息

研究起动工况排放特性对于进一步减少气体污染物排放具有重要意义。本文基于2 206m高海拔发动机试验台架对配有DOC+DPF+SCR+ASC尾气净化装置(以下简称后处理)的某国六柴油机进行WHSC试验循环,分析了柴油机在冷热起动工况下的原始排放和尾气排放差异性及其原因,并对气体污染物在后处理中的转换效率进行计算。结果表明:无论原始排放或尾气排放,柴油机冷起动循环中CO和THC排放浓度均明显大于热起动循环,且排放规律相似;但冷起动循环中NOx原始排放浓度却小于热起动循环。柴油机尾气净化装置在热起动循环中,CO、THC和NOx排放浓度转换效率良好,基本处于90%以上,但后处理在冷起动循环中对于CO排放浓度的转换效率较差,仅有9.2%。

关键词：高海拔国六柴油机 WHSC循环冷热起动工况排放后处理