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大型赛事下城轨运输保障实践与思考

现代城市轨道交通 2024年第2期 1-6页

作者：禹丹丹乔珂张含笑岳晓辉牛志斌北京市地铁运营有限公司北京100044 北京交通大学北京100091 天津轨道交通线网管理有限公司天津300392

城轨作为城市服务的窗口,对大型赛事交通保障具有极其重要的作用。文章首先分析城轨在大型赛事运输保障工作中面临的挑战;然后,梳理有关设备设施、行车组织、客运组织、安全服务、应急指挥5个方面的保障措施,并结合典型案例论述工作思路... 详细信息

城轨作为城市服务的窗口,对大型赛事交通保障具有极其重要的作用。文章首先分析城轨在大型赛事运输保障工作中面临的挑战;然后,梳理有关设备设施、行车组织、客运组织、安全服务、应急指挥5个方面的保障措施,并结合典型案例论述工作思路,提炼有关线网运力供给和车站客流组织方面的经验做法;最后,总结大型赛事下城轨运输保障需要重点关注的事项。相关研究可为城轨行业大型赛事运输保障工作提供启示,助力城轨运营企业为活动人员和乘客提供周到满意、安全便捷、舒适高效的高品质运营服务。

关键词：城市轨道交通大型赛事运输保障运力提升客运组织应急指挥

磁性CoFe/Ni_(4)Zn/FeO/rGO复合材料的制备及电磁波吸收性能

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微纳电子技术 2024年第1期61卷 60-69页

作者：武丹丹王政炎张含笑张妍兰王永祯太原理工大学材料科学与工程学院太原030024 山西省煤基固废资源化利用与绿色生态发展联合实验室太原030024

创新的微观结构设计和合适的多组分策略对于具有强吸收和宽有效吸收带宽(EAB)的先进电磁吸波材料(EAM)仍然具有挑战性。采用简单的水热还原与高温煅烧制备了磁性CoFe/Ni_(4)Zn/FeO/还原氧化石墨烯(rGO)(MR)复合吸波材料,MR复合材料具有... 详细信息

创新的微观结构设计和合适的多组分策略对于具有强吸收和宽有效吸收带宽(EAB)的先进电磁吸波材料(EAM)仍然具有挑战性。采用简单的水热还原与高温煅烧制备了磁性CoFe/Ni_(4)Zn/FeO/还原氧化石墨烯(rGO)(MR)复合吸波材料,MR复合材料具有丰富的异质界面与多孔结构,通过引入磁性颗粒调节电磁参数、提高阻抗匹配和衰减能力,在12.88GHz时最小反射损耗可以达到-46.15dB,有效吸收带宽高达约6.1GHz(10.64~16.72GHz)。MR复合材料优异的电磁吸波性能归因于三维多孔结构的多重反射、散射和弛豫过程以及界面基质的强界面极化。磁/介电性的多组分复合材料MR具备多种损耗机制,其协同作用能够进一步增强材料的吸波性能。

关键词：吸波材料复合材料界面极化磁性颗粒还原氧化石墨烯(rGO) 三维多孔结构

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中国假人头部皮肤材料参数优化设计研究

中国汽车 2024年第2期 59-63页

作者：张寒晓刘博嵩武永强刘伟东中国汽车技术研究中心有限公司天津300300

为探究皮肤材料参数对中国体征假人头部力学响应的影响,采用非均一缩放方法对Hybrid Ⅲ 50th假人头部有限元模型及标定限值进行缩放,获得了中国50百分位假人头部模型及标定限值。基于该模型,借助正交试验设计方法,构造多项式响应面代理... 详细信息

为探究皮肤材料参数对中国体征假人头部力学响应的影响,采用非均一缩放方法对Hybrid Ⅲ 50th假人头部有限元模型及标定限值进行缩放,获得了中国50百分位假人头部模型及标定限值。基于该模型,借助正交试验设计方法,构造多项式响应面代理模型,结合优化算法,得到了更逼近于中国真实人体头部力学响应性能的皮肤材料参数。该组参数可为中国体征物理假人头部皮肤材料配比研究提供相应指导。

关键词：优化设计皮肤材料参数中国体征假人头部缩放方法

层厚比对Cu-TiB2/Cu层状复合材料微观组织和力学性能的影响

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铸造技术 2024年第1期45卷 61-66页

作者：曹飞蔡磊韩非张涵潇刘楠谢张乐姜伊辉西安理工大学材料科学与工程学院导电材料与复合技术教育部工程研究中心陕西省电工材料与熔(浸)渗技术重点实验室陕西西安710048 西安理工大学西安智通自动化技术开发公司陕西西安710048

铜基复合材料由于优异的综合性能在电子封装、电接触等领域具有重要应用价值。然而,克服材料的强-塑性倒置关系一直面临着极大的挑战,层状构型设计被认为是解决该倒置难题的有效策略。本文采用粉末冶金并结合原位反应法,通过控制铺粉工... 详细信息

铜基复合材料由于优异的综合性能在电子封装、电接触等领域具有重要应用价值。然而,克服材料的强-塑性倒置关系一直面临着极大的挑战,层状构型设计被认为是解决该倒置难题的有效策略。本文采用粉末冶金并结合原位反应法,通过控制铺粉工艺,制备出Cu层与TiB2/Cu复合层交叠分布的Cu-TiB2/Cu层状复合材料。研究了Cu-TiB2/Cu层状复合材料的力学性能及断裂特征,并讨论了层状结构参数对材料综合性能的影响。当Cu层与TiB2/Cu复合层的层厚比为1∶3时,Cu-TiB2/Cu层状复合材料的极限抗拉强度(UTS)为315 MPa,断裂伸长率为18%,实现了良好的强塑性匹配。基于复合材料裂纹扩展路径表征与分析,揭示了层状构型设计在抑制裂纹扩展、促使裂纹偏转等方面的作用机制,为高强韧铜基复合材料的构型设计和性能优化提供新思路。

关键词： Cu-TiB2/Cu复合材料层状结构微观组织强塑性

Effect of N-fertilizer Application on Yield,Grain Quality and N-fertilizer Use Efficiency of the Rapeseed Cultivars with Normal and High Oil Content

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Asian Agricultural Research 2016年第11期8卷 83-86页

作者： Hao LIU Qiannan FENG Jingyi LIU Yunyan FENG hanxiao zhang Feihu HUI Qingsong ZUO Key Laboratory of Crop Genetics and Physiology of Jiangsu Province Yangzhou University Lixiahe Institute of Agricultural Sciences

In this study,seed yield,quality and N-fertilizer use efficiency in rape(Brassica napus L.) were researched in normal oil content cultivar(Yangyou 6) and two high oil content cultivars(Zhongshuang 11 and Zheyou 50). Results showed that the average oil content of all treatments in Yangyou 6,Zhongshuang 11 and Zheyou 50 was 42. 87%,47. 37% and 48. 28%,respectively. The average protein content of all treatments in Yangyou 6,Zhongshuang 11 and Zheyou 50 was 24. 15%,22. 71% and 21. 84%,respectively. The increased ratio of total nitrogen accumulation amount in Yangyou 6 was higher than that in Zhongshuang 11 and Zheyou 50. Among three cultivars,the total protein accumulation amount in Yangyou 6 was highest,and the total oil accumulation amount was highest in Zheyou 50. With increasing nitrogen fertilization,the value of different parameters of N-fertilizer use efficiency decreased. The average N use efficiency in Yangyou 6 was 68. 70%,which was higher than that in Zhongshuang 11 and Zheyou 50(65. 06% and 60. 30%,respectively). The average N-fertilizer agronomic use efficiency in Yangyou 6 was also highest among three cultivars,which was 8. 97 kg seed / kg N. On the contrary,the average N-fertilizer physiological use efficiency in Zhongshuang 11 and Zheyou 50 was 13. 03 kg seed / kg N and 13. 84 kg seed / kg N,respectively,which was higher than that in Yangyou 6(12. 91 kg seed / kg N). Differences in partial factor productivity of N-fertilizer were slight among three cultivars.

关键词： Rapeseed Cultivars Quality N-fertilizer use efficiency

UV-B对设施油桃叶片叶绿素生物合成的影响

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园艺学报 2024年第6期51卷 1332-1344页

作者：田歌刘建廷高传彩赵雪惠樊永信李森张寒啸陈修德李玲李冬梅山东农业大学园艺科学与工程学院山东果蔬优质高效生产协同创新中心山东泰安271018 潍坊学院种子与设施农业工程学院山东潍坊261061

为明晰桃叶片叶绿素生物合成过程中对紫外线B(Ultraviolet B,UV-B)辐照响应的关键步骤,以设施栽培的‘中油5号’油桃(Prunus persica var.nectariana)7年生树为试材,自花后7 d开始,每天8:30—9:30补充适宜剂量(由前期试验筛出,约1.44 k ... 详细信息

为明晰桃叶片叶绿素生物合成过程中对紫外线B(Ultraviolet B,UV-B)辐照响应的关键步骤,以设施栽培的‘中油5号’油桃(Prunus persica var.nectariana)7年生树为试材,自花后7 d开始,每天8:30—9:30补充适宜剂量(由前期试验筛出,约1.44 k J·m-2·d-1)的UV-B直至果实采收,以正常生长、未补充UV-B辐照的植株为对照,对生育期内叶片叶绿素生物合成过程中前体物质、中间产物和叶绿素含量以及关键酶活性的动态变化进行了探究。结果表明,在叶绿素合成第一阶段中,UV-B辐照通过提升前体物质δ–氨基酮戊酸(ALA)合成关键酶——谷氨酸酯–1–半醛2,1–氨基变位酶(GSA-AM)的活性,增加了ALA的积累量,为生物合成的开始奠定物质基础。在第二阶段中,UV-B提高了胆色素原脱氨酶(PBGD)的活性,促进了羟甲基胆色素原的合成,为后续产物尿卟啉原Ⅲ(UrogenⅢ)的合成提供底物,使得整个生育期内叶片中粪卟啉原Ⅲ(CoprogenⅢ)和原卟啉Ⅸ(ProtoⅨ)的含量显著提升。UV-B辐照后第三阶段的Mg–螯合酶(Mg CH)和Mg–原卟啉Ⅸ单甲基酯环化酶(Mg PEC)等关键酶的活性显著升高,各中间产物Mg–原卟啉Ⅸ(Mg PⅨ)、Mg–原卟啉Ⅸ甲酯(Mg PME)、联乙烯原叶绿素酸酯、原叶绿素酸酯(Pchlide)、叶绿素酸酯a(Chlide a)、叶绿素酸酯b(Chlide b)含量均得到提升,最后产物叶绿素的含量也显著高于对照。可见UV-B辐照影响叶绿素生物合成的主要关键步骤为前体物质ALA的合成、羟甲基胆色素原的合成、UrogenⅢ向CoprogenⅢ的转化、Mg2+插入ProtoⅨ及其后等4个步骤,且对叶绿素生物合成的影响具有长期积累性。

关键词：油桃设施栽培紫外线B 叶绿素生物合成

Physical activity and exercise in liver cancer

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Liver Research 2024年第1期8卷 22-33页

作者： Haiyan Chen Huimin Zhou Bo Wu hanxiao Lu Jie zhang Yan zhang Yuanlong Gu Guangwen Zhou Jie Xiang Jun Yang Department of General Surgery Affiliated Hospital of Jiangnan UniversityJiangsuChina School of Medicine Jiangnan University WuxiJiangsuChina Department of General Surgery Shanghai Sixth People's HospitalShanghaiChina Department of Endocrinology Wuxi Mingci Cardiovascular HospitalWuxiJiangsuChina

Sarcopenia and physical deconditioning are common complications in patients with liver cancer,which are frequently caused by insufficient physical activity and poor nutritional status,resulting in physical frailty and a significant impact on the patient's physical fitness.Notably,sarcopenia,frailty,and poor cardiopulmonary endurance have all been linked to higher mortality rates among patients with liver cancer.Exercise intervention significantly improves various health parameters in liver cancer patients,including metabolic syndrome,muscle wasting,cardiorespiratory endurance,health-related quality of life,and reduction in hepatic venous pressure gradient.However,the link between physical exercise and liver cancer is commonly overlooked.In this article,we will examine the impact of exercise on liver cancer and present the most recent evidence on the best types of exercise for various stages of liver cancer.This article also summarizes and discusses the molecular mechanisms that control metabolism and systemic immune function in tumors.In brief,physical exercise should be considered an important intervention in the prevention and treatment of liver cancer and its complications.

关键词： Physical activity(PA) Exercise Liver cancer Sarcopenia Frailty Rehabilitation

Molecular features of gastroenteropancreatic neuroendocrine carcinoma: A comparative analysis with lung neuroendocrine carcinoma and digestive adenocarcinomas

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Chinese Journal of Cancer Research 2024年第1期36卷 90-102页

作者： Jianwei zhang hanxiao Chen Junli zhang Sha Wang Yanfang Guan Wenguang Gu Jie Li Xiaotian zhang Jian Li Xicheng Wang Zhihao Lu Jun Zhou Zhi Peng Yu Sun Yang Shao Lin Shen Minglei Zhuo Ming Lu Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of Gastrointestinal OncologyPeking University Cancer Hospital&InstituteBeijing 100142China Department of Radiation Therapy National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital&Shenzhen HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeShenzhen 518172China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department I of Thoracic OncologyPeking University Cancer Hospital&InstituteBeijing 100142China Medical Department Nanjing Geneseeq Technology Inc.Nanjing 210061China Geneplus-Beijing Beijing 102200China State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers Beijing Key Laboratory of Carcinogenesis and Translational ResearchDepartment of Gastrointestinal OncologyPeking University Cancer Hospital&InstituteBeijing 100142China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of PathologyPeking University Cancer Hospital&InstituteBeijing 100142China

Objective: There is an ongoing debate about whether the management of gastroenteropancreatic(GEP)neuroendocrine carcinoma(NEC) should follow the guidelines of small-cell lung cancer(SCLC). We aim to identify the genetic differences of GEPNEC and its counterpart.Methods: We recruited GEPNEC patients as the main cohort, with lung NEC and digestive adenocarcinomas as comparative cohorts. All patients undergone next-generation sequencing(NGS). Different gene alterations were compared and analyzed between GEPNEC and lung NEC(LNEC), GEPNEC and adenocarcinoma to yield the remarkable genes.Results: We recruited 257 patients, including 99 GEPNEC, 57 LNEC, and 101 digestive adenocarcinomas.Among the mutations, KRAS, RB1, TERT, IL7R, and CTNNB1 were found to have different gene alterations between GEPNEC and LNEC samples. Specific genes for each site were revealed: gastric NEC(TERT amplification),colorectal NEC(KRAS mutation), and bile tract NEC(ARID1A mutation). The gene disparities between small-cell NEC(SCNEC) and large-cell NEC(LCNEC) were KEAP1 and CDH1. Digestive adenocarcinoma was also compared with GEPNEC and suggested RB1, APC, and KRAS as significant genes. The TP53/RB1 mutation pattern was associated with first-line effectiveness. Putative targetable genes and biomarkers in GEPNEC were identified in22.2% of the patients, and they had longer progression-free survival(PFS) upon targetable treatment [12.5 months vs. 3.0 months, HR=0.40(0.21-0.75), P=0.006].Conclusions: This work demonstrated striking gene distinctions in GEPNEC compared with LNEC and adenocarcinoma and their clinical utility.

关键词： Neuroendocrine carcinoma gastroenteropancreatic lung genetic alterations molecular markers

投资者实地调研对企业庞氏融资的治理效应:“眼见为实”还是“雾里看花”?

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上海财经大学学报（哲学社会科学版） 2023年第5期25卷 61-76页

作者：王伊攀张含笑山东工商学院金融学院山东烟台264005

党的二十大明确提出,维护国家安全要以经济安全为基础。但近年来日益凸显的企业庞氏融资风险对经济安全构成严峻挑战,因此探寻有效的治理工具成为重要议题。投资者实地调研在揭示庞氏融资方面具备市场化、利益相关性强的优势,但其治理... 详细信息

党的二十大明确提出,维护国家安全要以经济安全为基础。但近年来日益凸显的企业庞氏融资风险对经济安全构成严峻挑战,因此探寻有效的治理工具成为重要议题。投资者实地调研在揭示庞氏融资方面具备市场化、利益相关性强的优势,但其治理效果尚不明确。文章从信息效应和监督效应两个维度检验了投资者实地调研对企业庞氏融资的影响,结果表明投资者实地调研能有效抑制企业庞氏融资,发挥“眼见为实”的治理效应。其作用机制主要在于通过改善企业信息质量和效率、增强监督完备程度发挥作用,并且治理效果因投资者调研偏好、机构投资者合谋可能性的不同而存在差异。这不仅为防范企业庞氏融资风险提供了有效工具,也有助于更全面地认识投资者实地调研的治理效应。

关键词：庞氏融资投资者实地调研信息效应监督效应