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Selenium-oxidizing Agrobacterium sp.T3F4 decreases arsenic uptake by Brassica rapa *** a native polluted soil

Journal of Environmental Sciences 2024年第4期138卷 506-515页

作者： Lijin An Chunzhi zhou Lipeng Zhao ao Wei Yiting Wang Huimin Cui Shixue Zheng State Key Laboratory of Agricultural Microbiology College of Life Science and TechnologyHuazhong Agricultural UniversityWuhan 430070China

Toxic arsenic(As)and trace element selenium(Se)are transformed by microorganisms but their complex interactions in soil-plant systems have not been fully *** Asand Se-oxidizing bacterium,Agrobacterium sp.T3F4,was applied to a native seleniferous As-polluted soil to investigate As/Se uptake by the vegetable Brassica rapa *** As-Se interaction as mediated by strain *** Se content in the aboveground plants was significantly enhanced by 34.1%,but the As content was significantly decreased by 20.5% in the T3F4-inoculated pot culture compared to the control(P<0.05).Similar result was shown in treatment with additional 5 mg/kg of Se(IV)in *** addition,the As contents in roots were significantly decreased by more than 35% under T3F4 or Se(IV)treatments(P<0.05).Analysis of As-Se-bacterium interaction in a soil simulation experiment showed that the bioavailability of Se significantly increased and As was immobilized with the addition of the T3F4strain(P<0.05).Furthermore,an As/Se co-exposure hydroponic experiment demonstrated that As uptake and accumulation in plants was reduced by increasing Se(IV)*** 50% growth inhibition concentration(IC50)values for As in plants were increased about one-fold and two-fold under co-exposure with 5 and 10μmol/L Se(IV),*** conclusion,strain T3F4 improves Se uptake but decreases As uptake by plants via oxidation of As and Se,resulting in decrease of soil As bioavailability and As/Se competitive absorption by *** provides a potential bioremediation strategy for Se biofortification and As immobilization in As-polluted soil.

关键词： Selenium oxidation Selenium biofortification Arsenite-oxidizing bacteria Arsenic immobilization Brassica rapa L

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住院医师规范化培训结业考核专业理论考试结果的影响因素分析

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中华医学教育探索杂志 2024年第6期23卷 835-840页

作者：王欣倍周遨严晓蕾张静一朱琼王艳程纯上海交通大学医学院附属第九人民医院规范化培训办公室上海200011 上海之几信息科技有限公司上海200071 上海交通大学医学院附属第九人民医院院长办公室上海200011

目的:分析2018至2021年上海某三甲综合医院的住院医师规范化培训(住培)结业考核专业理论考试成绩的影响因素并建立预测模型,为进一步提升住培质量提供参考。方法:收集并整理该基地2018至2021年参加住培结业考核的556名住院医师数据信息... 详细信息

目的:分析2018至2021年上海某三甲综合医院的住院医师规范化培训(住培)结业考核专业理论考试成绩的影响因素并建立预测模型,为进一步提升住培质量提供参考。方法:收集并整理该基地2018至2021年参加住培结业考核的556名住院医师数据信息,预测分析方法采用二元回归法和逻辑回归模型方法,分别分析住院医师基本信息、住院医师进入基地培训的各类日常考核成绩及反映专业基地培训质量的专业基地绩效考核分数等方面与结业考核专业理论考试成绩的相关性,并构建预测结业考核专业理论考试成绩模型。应用SPSS 26.0进行统计分析,应用二元回归法和逻辑回归法构建模型数据集。结果:2018至2021年该基地共有556人参加住培结业考核,第一站专业理论考站首次合格率为97.48%(542/556),其中双一流学校毕业生一次通过率最高为98.09%(359/366),博士研究生通过率最高为98.59%(140/142),培训两年制的通过率最高为98.34%(297/302)。在住院医师基本信息等分类变量对结业综合考试专业理论考试成绩的影响分析中,使用二元回归法发现专业基地所属级别与住院医师是否通过专业理论的考试有一定相关作用(P<0.05)。在住院医师规培期间的各类日常考核成绩及专业基地绩效考核分数对结业考核专业理论考试成绩(具体分数)的逻辑回归分析中,发现年度专业考核理论成绩、执业医师资格考试首次理论成绩、年度业务水平测试成绩及专业基地绩效考核分数是影响结业考核专业理论考试成绩的关键因素(P<0.05)。结业考专业理论考核成绩的回归分析中,年度业务水平测试成绩回归系数最高,其共线性统计方差扩大因子(variance inflation factor,VIF)也是最高,表明存在较强的多重共线性,因此年度业务水平测试成绩对最终的结业考核专业理论成绩起到较强预测作用。结论:利用二元回归法及逻辑回归模型可分析专业理论考试的可能影响因素及其关联度大小,通过建立的两个住院医师结业考核专业理论考试预测模型,拟预测风险学员。通过贯彻分层递进的理念,增加个性化的辅导等,实现住培信息化管理,智能提前干预,有望进一步提升住培结业考的通过率,最终达到提升住培质量的目的。

关键词：住院医师规范化培训通过率培训质量影响因素预测模型

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基于综合KPC解卷积的机车轴承故障诊断方法

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电力机车与城轨车辆 2024年第5期47卷 30-36页

作者：陈之恒邓聪王诗航仲继生钱彦行周奥中车株洲电力机车有限公司湖南株洲412001

针对电力机车轴箱轴承故障的诊断,文章提出了一种基于峭度、皮尔逊相关系数和故障冲击比(综合KPC)解卷积的轴箱轴承诊断方法。首先运用改进的互补集合经验模态分解(CEEMD)算法对原始振动信号进行降噪处理,然后应用多点最优最小熵反褶积... 详细信息

针对电力机车轴箱轴承故障的诊断,文章提出了一种基于峭度、皮尔逊相关系数和故障冲击比(综合KPC)解卷积的轴箱轴承诊断方法。首先运用改进的互补集合经验模态分解(CEEMD)算法对原始振动信号进行降噪处理,然后应用多点最优最小熵反褶积调整(MOMEDA)算法对重构信号进行解卷积后和包络解调分析,最终实现轴承故障诊断。研究结果表明,该方法相比传统方法具有较高的辨识度,且能很好地识别出轴承的故障模式。

关键词：机车故障诊断轴箱轴承解卷积

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误诊为色素痣的其他疾病140例分析

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临床误诊误治 2024年第1期37卷 37-42页

作者：郑建峰孙振燕牛多山章婧周奥杨丽朱文强宣城市人民医院皖南医学院附属宣城医院皮肤科安徽宣城242000 宣城市人民医院皖南医学院附属宣城医院病理科安徽宣城242000

目的分析其他相关疾病误诊为色素痣原因,并探讨防范措施,提高临床诊断水平。方法回顾性分析2019年1月—2022年12月宣城市人民医院病理数据库中140例初诊为色素痣,但经组织病理检查排除色素痣诊断的患者临床及组织病理资料。结果误诊为... 详细信息

目的分析其他相关疾病误诊为色素痣原因,并探讨防范措施,提高临床诊断水平。方法回顾性分析2019年1月—2022年12月宣城市人民医院病理数据库中140例初诊为色素痣,但经组织病理检查排除色素痣诊断的患者临床及组织病理资料。结果误诊为皮肤色素痣140例,男55例,女85例,年龄(46.64±15.27)岁。皮损发生部位:头面颈部55例,躯干部44例,四肢22例,手足部13例,外阴6例。经组织病理诊断为脂溢性角化病70例,血管角皮瘤9例,基底细胞癌8例,皮肤纤维瘤7例,角质层出血6例,寻常疣4例,表皮囊肿4例,表皮鳞状上皮增生3例,皮赘3例,日光性角化病2例,恶性黑素瘤2例,皮脂腺增生2例,毛发上皮瘤2例,汗孔瘤2例,钙化上皮瘤2例,其他14例。结论多种疾病与色素痣临床特征相似,临床误诊率较高,综合临床特征、皮肤镜检查、皮肤组织病理检查等可明确诊断,提高诊断率。

关键词：脂溢性角化病血管角皮瘤基底细胞癌皮肤纤维瘤误诊色素痣皮肤镜组织病理

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An Analysis of the Cold Chain Logistics concerning Agricultural Products in Chongqing City

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Asian Agricultural Research 2016年第1期8卷 19-21,32页

作者： Bo CHEN ao zhou Southwest University

Agriculture is the foundation of the national economy. On the one hand,there is increasing demand for fresh and safe refrigerated agricultural products; on the other hand,the current cold chain logistics is relatively underdeveloped and has many problems. This paper does a research on the major large-scale agricultural cold-chain logistics companies in Chongqing,and finds that cold-chain logistics in Chongqing has some problems such as incomplete industrial chain,relatively backward infrastructure,lack of talents,and high logistics costs. Some solutions to these problems are put forward: improving chain logistics infrastructure; strengthening personnel training; building information platform to create a new model of the cold-chain logistics in the Internet era; seeking government's policy and financial support.

关键词： Agricultural products Cold-chain logistics System

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Challenges in applying REE-based thermobarometers: Insights from mafic-ultramafic granulites in Indian southern granulite terrain

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Science China Earth Sciences 2024年第11期67卷 3448-3464页

作者： Xiaofei XU Longlong GOU Chengli ZHANG Junsheng LU Yan ZHao Wenhao ao Yuhua HU Feng zhou Faculty of Land Resources Engineering Kunming University of Science and Technology State Key Laboratory of Continental Dynamics Department of Geology Northwest University

High-temperature diffusion of major elements may obscure the records of early and peak metamorphic stages in granulites,while trace elements are more likely to preserve these records due to their lower diffusion ***,using calibrated REE-based thermobarometers has proved essential for reconstructing these key stages,drawing considerable attention and application from ***,the precision of these thermobarometers depends on including both major and trace elements from coexisting minerals to define the correlation coefficients（A,B,and D） among mineral pairs,indicating that the elemental composition of these pairs can affect the *** study examines the mafic-ultramafic granulites in the southern granulite terrain,India,employing integrated methods such as petrography,mineral chemistry,phase equilibrium modeling,and REE-based *** aim to determine their metamorphic conditions and evolutionary history and to identify potential challenges in using REE-based *** garnet,clinopyroxene,and orthopyroxene in the mafic-ultramafic granulite samples display homogeneous compositional profiles,with pronounced Fe-Mg diffusion zones at the interfaces between garnet and ***,the profiles of trace elements within garnet and clinopyroxene are better *** into Fe-Mg exchange and randomly selected mineral pairs significantly influence the accuracy of REE-based ***-Mg exchange can increase in coefficient A,while decreasing coefficient B for light rare earth elements（LREEs） and increasing it for heavy rare earth elements（HREEs）,ultimately resulting in overestimations when calculating REE-based *** example,selecting major compositions with an Ex(=(XMgC-XMg0)/XMg0×100%;where XMgCis the value after Fe-Mg exchange,XMg0is the value before Fe-Mg exchange;XMg=Mg/(Fe2++Mg)) value of ～10 for calculation using the REE-in-Grt-Cpx thermobarometer will result in pressures and t

关键词： Granulites REE-based thermobarometer Fe-Mg exchange Randomly selected mineral pairs

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Yangzheng Sanjie decoction regulates proliferation and apoptosis of gastric cancer cells by enhancing let-7a expression

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World Journal of Gastroenterology 2017年第30期23卷 5538-5548页

作者： Hai-Xia Deng Ya-Ya Yu ao-Qiang zhou Jing-Li Zhu Li-Na Luo Wan-Qun Chen Ling Hu Geng-Xin Chen The Second Affiliated Hospital Guangzhou University of Chinese Medicine Institute of Gastroenterology Guangzhou University of Chinese Medicine The First Affiliated Hospital Guangzhou University of Chinese Medicine Discipline of Integrated Chinese and Western Medicine in Guangzhou University of Chinese Medicine

AIM To explore the let-7a-mediated anti-cancer effect of Yangzheng Sanjie decoction(YZSJD) in gastric cancer(GC) *** YZSJD-containing serum(YCS) was prepared using traditional Chinese medicine serum pharmacology methods. After YCS treatment, cell proliferation and apoptosis were assessed by cell counting kit-8 assay and flow cytometry, respectively, and mi RNA expression profiles were determined using q PCR arrays. Let-7a expression was examined by in situ hybridization in GC tissues and by q PCR in GC cells. c-Myc protein expression was detected by immunohistochemistry in GC tissues, and by Western blot in cell *** YZSJD significantly inhibited proliferation and induced apoptosis in AGS and HS-746 T GC cells. After treatment with YCS, the mi RNA expression profiles were altered and the reduced let-7a levels in both cell lines were up-regulated, accompanied by a decrease in c-Myc expression. Moreover, decreased let-7a expression and increased c-Myc expression were observed during the progression of gastric mucosa *** YZSJD inhibits proliferation and induces apoptosis of GC cells by restoring the aberrant expression of let-7a and c-Myc.

关键词： Gastric cancer let-7a c-Myc proliferation apoptosis Yangzheng Sanjie decoction

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Research on key parameters of the Fatigue Arousal Zone in extra-long tunnels based on natural driving experiments

Digital Transportation and Safety

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Digital Transportation and Safety 2023年第4期2卷 284-297页

作者： Ting Shang Guan Lian Lei Xie ao zhou School of Traffic&Transportation Chongqing Jiaotong UniversityChongqing 400074China Jiangsu Vocational College of Agriculture and Forestry ZhenjiangJiangsu 212499China

To effectively mitigate the short-term fatigue effects of driving in extra-long tunnels,this study conducted natural driving experiments in five extra-long tunnels of varying lengths and tunnel group *** data obtained from natural driving fatigue experiments,this study identified perclos P80,variable coefficient of pupil diameter,and acceleration as fatigue sensitivity indicators,determined through significance tests of difference and correlation *** study employed an ordered multi-class Logistic model to investigate the factors that influence driving fatigue in extra-long *** most significant variable in the model was perclos P80,which served as an indicator for classifying and identifying fatigue levels in extra-long *** this,a dimensionless quantitative metric,the Fatigue Driving Degree,was formulated,and the Threshold of Driving Fatigue was *** the quantitative framework for driving fatigue,this paper standardized the definition of the fatigue arousal zone in extra-long *** study analyzed the operational principles and validated the key parameters of the fatigue arousal zone in extra-long *** parameters encompass the placement location,length,form,and traffic induction design of the fatigue arousal *** research findings can serve as a theoretical reference for the development of fatigue arousal technology in extra-long highway tunnels in China.

关键词： ITS Traffic Safety Optimization Risk Transportation Planning

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C@Ag core‒shell structure as lubricating additives towards high efficient lubrication

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Friction 2024年第9期12卷 1991-2003页

作者： Dong ao Xiaoqiang FAN Minhao ZHU Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Tribology Research Institute School of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu 610031China

Efficient cooperative lubrication can be achieved via the introduction of core‒shell structure lubricant additives with hard core and soft shell,for obtaining the expected anti-wear performance from the structural changes in the friction *** this study,C@Ag microspheres with a core‒shell structure were prepared by the redox method with carbon spheres as the core and Ag nanoparticles as the *** tribological behaviors as base oil(G1830)additive with different concentrations were investigated in *** with base oil,the addition of C@Ag particles at 0.5 wt%can reduce the coefficient of friction(COF)and wear volume(Wv)up to 15.5%and 88%,*** importantly,C@Ag particles provide superior lubrication performance to single additive(like carbon sphere(CS)and Ag nanoparticle).C@Ag core‒shell particles contribute to the formation of tribo-film by melt bonding of flexible Ag and carbon sphere(CS)toward excellent self-repair performance and high-efficiency ***,core‒shell structural nanoparticles with hard-core and soft-shell hold bright future for high-performance lubrication application.

关键词： C@Ag microspheres tribo-film self-repair performance high-efficiency lubrication

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P2P信息检索系统的查询结果排序与合并策略

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计算机学报 2007年第3期30卷 405-414页

作者：凌波周水庚周傲英中国浦东干部学院信息技术部上海201204 复旦大学计算机科学与工程系上海200433

基于P2P信息检索系统的特性,提出了一种完全分布式的查询结果排序与合并策略.首先分析当前P2P信息检索系统查询结果排序和合并问题的根源;接着提出一种完全分布式的查询结果排序与合并策略,包括元数据管理策略、查询结果的排序与合并的... 详细信息

基于P2P信息检索系统的特性,提出了一种完全分布式的查询结果排序与合并策略.首先分析当前P2P信息检索系统查询结果排序和合并问题的根源;接着提出一种完全分布式的查询结果排序与合并策略,包括元数据管理策略、查询结果的排序与合并的实现;然后用详细的实验证明了该策略的有效性.

关键词： P2P 信息检索查询结果排序与合并

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