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Water-soluble matter in PM_(2.5)in a coastal city over China:Chemical components,optical properties,and source analysis

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Journal of Environmental Sciences 2022年第4期34卷 21-36页

作者： Yanan Zhan Narcisse T.Tsona Jianlong Li Qingcai Chen Lin Du Environment Research Institute Shandong UniversityQingdao 266237China School of Environmental Science and Engineering Shaanxi University of Science and TechnologyXi’an 710021China

Although marine and terrestrial emissions simultaneously affect the formation of atmospheric fine particles in coastal areas,knowledge on the optical properties and sources of water-soluble matter in these areas is still scarce.In this work,taking Qingdao,China as a typical coastal location,the chemical composition of PM_(2.5)duringwinter 2019was analyzed.Excitation-emission matrix fluorescence spectroscopy was combined with parallel factor analysis model to explain the components of water-soluble atmospheric chromophores of PM_(2.5).Our analysis indicated that NO_(3)^(-),NH_(4)^(+)and SO_(4)^(2-)ions accounted for 86.80%of the total ion mass,dominated by NO_(3)^(-).The ratio of[NO_(3)^(-)]/[SO_(4)^(2-)]was up to 2.42±0.84,suggesting thatmobile sources play an important role in local pollutants emission.The result of positive correlation between Abs_(365)with K^(+)suggests that biomass burning is an important source of water-soluble organic compounds(WSOC).Six types of fluorophores(C1-C6),all humic-like substances,were identified in WSOC.Humification index,biological index and fluorescence index in winter were 1.66±0.34,0.51±0.44 and 1.09±0.78,respectively,indicating that WSOC in Qingdao were mainly terrestrial organic matters.Overall,although the study area is close to the ocean,the contribution of terrestrial sources to PM_(2.5),especially vehicle exhaust and coal combustion,is still much higher than that of marine sources.Our study provides a more comprehensive understanding of chemical and optical properties of WSOC based on PM_(2.5)in coastal areas,and may provide ground for improving local air quality.

关键词： Excitation-emission matrix spectroscopy Chemical components Optical properties PM_(2.5) Coastal city

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A new method for calculating the activity of stable compound from binary phase diagram

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Rare Metals 2006年第5期25卷 448-451页

作者： chen Dengfu DONG Lingyan BAI chenguang LIU qingcai WANG Chuanjun College of Materials Science and Engineering Chongqing University Chongqing 400030 China

A new method to calculate the activity of a stable compound in a binary phase diagram was presented and discussed. According to the formula for calculating activity from the binary phase diagram, the equilibrium constant can be calculated through the mass action principle after the activities of two pure components were computed respectively. Based on that, the activity of a stable compound can be easily obtained at last. The activity of the stable compound InSb is calculated in the In-Sb binary system by using this method. The result is well consistent with another calculation value.

关键词： physic-chemistry of metallurgy phase diagram mass action principle stable compound activity

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环境持久性自由基健康风险研究进展

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环境科学与技术 2022年第9期45卷 194-203页

作者：孙浩堯陈庆彩西安航空学院陕西西安710077 陕西科技大学陕西西安710016

环境持久性自由基(EPFRs)是一种广泛存在于自然环境中的环境风险物质,因其能够长时间存在于环境中并会与氧气作用生成活性氧进而危害人体健康,所以EPFRs的健康风险成了近年来的研究热点。该文针对EPFRs的健康风险研究进展进行了概述,介... 详细信息

环境持久性自由基(EPFRs)是一种广泛存在于自然环境中的环境风险物质,因其能够长时间存在于环境中并会与氧气作用生成活性氧进而危害人体健康,所以EPFRs的健康风险成了近年来的研究热点。该文针对EPFRs的健康风险研究进展进行了概述,介绍了EPFRs的浓度检测方案及毒性检测方法,主要包括活性氧检测、生物毒性检测及毒性等量换3种常用方法。燃料的不完全燃烧及二次光化学作用是EPFRs的主要生成机制。毒理学研究表明,EPFRs不但会对人体呼吸系统及免疫系统造成危害,进而造成哮喘及心血管疾病,也会影响动植物的生长。在未来的研究中可以针对不同机制下生成EPFRs的毒性进行具体研究,以期更好地揭示实际环境中EPFRs的健康风险。

关键词：环境持久性自由基健康风险污染特征

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Quantitative prediction of shale gas sweet spots based on seismic data in Lower Silurian Longmaxi Formation,Weiyuan area,Sichuan Basin,SW China

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Petroleum Exploration and Development 2018年第3期45卷 422-430页

作者： ZENG qingcai chen Sheng HE Pei YANG Qing GUO Xiaolong chen Peng DAI Chunmeng LI Xuan GAI Shaohua DENG Yu HOU Huaxing Research Institute of Petroleum Exploration & Development PetroChina Beijing 100083 China China University of Petroleum Beijing 102249 China

Sweet spots in the shale reservoirs of the Lower Silurian Longmaxi Formation in Weiyuan 201 Block of Sichuan Basin were predicted quantitatively using seismic data and fuzzy optimization method. First, based on seismic and rock physics analysis, the rock physics characteristics of the reservoirs were determined, and elastic parameters sensitive to shale reservoirs with high gas content were selected. Second, data volumes with high precision of the elastic parameters were obtained from pre-stack simultaneous inversion. The horizontal distribution of key parameters for shale gas evaluation were calculated based on the results of rock physics analysis. Then, the fuzzy evaluation equation was established by fuzzy optimization method with test and logging data of horizontal wells with similar operation conditions. key parameters affecting the productivity of horizontal wells were sorted out and the weights of them in the sweet spots quantitative prediction were worked out by fuzzy optimization to set up a sweet spots evaluation system. Three classes of shale gas reservoirs which including two kinds of sweet spots were predicted with the above procedure, and the sweet spots have been predicted quantitatively by combining the above prediction results with the testing production. The testing results of 7 verification wells proved the reliability of the prediction results.

关键词： Sichuan Basin Lower Silurian Longmaxi Formation shale gas sweet spots quantitative prediction fuzzy optimization

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方回诗学的“出位之思”新论

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安徽师范大学学报（社会科学版） 2023年第4期51卷 1-9页

作者：郭庆财山西师范大学文学院太原030031

钱钟书先生认为,方回作为诗人又依傍朱学乃属“出位之思”,方回称朱子的诗“本来馀事压黄陈”亦不允当。钱先生的看法基于一贯的文学本位立场,而对方回的诗学视域缺少同情之理解。方回的诗学基于弘大的文化视野,且有明显的本末、体用色... 详细信息

钱钟书先生认为,方回作为诗人又依傍朱学乃属“出位之思”,方回称朱子的诗“本来馀事压黄陈”亦不允当。钱先生的看法基于一贯的文学本位立场,而对方回的诗学视域缺少同情之理解。方回的诗学基于弘大的文化视野,且有明显的本末、体用色彩。首先,方回持守的“斯文”理想,包括了诗学和义理之学,而以后者为根本;其次,方回诗学的“格高”理想,包含了“诗格”与“人格”,而以人格为根本;其三,方回学诗的“活法”路径,包括句法之变和心灵之活,乃以“心活”为根本。以上三对关系中,义理之学、人格之高、心灵之活均以朱子学为最终根源。由此,方回的诗思、诗风臻于新境,并激活了没落的江西诗派;而方回认为朱子诗胜于黄、陈,也是方回诗学发展的自然逻辑。

关键词：方回出位之思朱子学江西诗学

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治理能力现代化视域下高校学生管理策略探究

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沈阳师范大学学报（教育科学版） 2022年第3期1卷 49-54页

作者：陈国军陶庆才沈阳医学院团委辽宁沈阳110034 沈阳医学院党政办公室辽宁沈阳110034

治理体系和治理能力现代化是新时代高校全面深化改革的重要目标,对高校内部学生管理工作亦提出了新的要求。当前,我国高校学生管理存在服务属性缺失、二元价值混淆、管理与教育脱节、专业化管理水平较低的问题。基于治理能力现代化视域... 详细信息

治理体系和治理能力现代化是新时代高校全面深化改革的重要目标,对高校内部学生管理工作亦提出了新的要求。当前,我国高校学生管理存在服务属性缺失、二元价值混淆、管理与教育脱节、专业化管理水平较低的问题。基于治理能力现代化视域,高校要积极构建以学生为主体的管理新模式、道德与法制并行的教育方式、多主体的协同治理体系和专业化的学生管理新机制。

关键词：治理能力现代化高校学生管理高校辅导员管理效能

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Identification of Genetic Relationship of Hybrid Rice Varieties to Their Parents with PCR Products

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Asian Agricultural Research 2020年第5期12卷 40-41,59页

作者： Lu LIU Shujuan HU Xi chen Weizheng PENG Bin YANG qingcai ZHAN Hunan Agricultural Biotechnology Research Institute Changsha 410125 China Longping Branch of Graduate School Hunan University Changsha 410125 China

[Objectives]To establish a simple,rapid and accurate method for identifying the genetic relationship of hybrid rice varieties to their parents.[Methods]Taking F1 hybrids Liangyou 336,Deliangyou Huazhan,and the parents of Liangyou 336,i.e.,C815S(♀)and R336(♂),as experimental materials,the genetic relationship of the hybrid rice varieties to the parental materials was identified by way of PCR amplification with the 48 pairs of SSR primers of Protocol for Identification of Rice Varieties:SSR Marker Method(NY/T 1433-2014).[Results]The genetic relationship of the hybrid rice varieties could be determined by comparing the PCR amplification products of the mixed DNA of the parents and the DNA of the F1 hybrids.[Conclusions]This method not only reduced the number of samples required but also had a good visual effect and high accuracy.

关键词： Hybrid rice Parent SSR primer PCR mixed DNA Genetic relationship

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A Parallel Platform for Web Text Mining

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ZTE Communications 2013年第3期11卷 56-61页

作者： Ping Lu Zhenjiang Dong Shengmei Luo Lixia Liu Shanshan Guan Shengyu Liu Qingcai Chen ZTE Corporation Shenzhen Graduate School Harbin Institute of Technology

With user-generated content, anyone can De a content creator. This phenomenon has infinitely increased the amount of information circulated online, and it is beeoming harder to efficiently obtain required information. In this paper, we describe how natural language processing and text mining can be parallelized using Hadoop and Message Passing Interface. We propose a parallel web text mining platform that processes massive amounts data quickly and efficiently. Our web knowledge service platform is designed to collect information about the IT and telecommunications industries from the web and process this in-formation using natural language processing and data-mining techniques.

关键词： natural language processing text mining massive data paral-lel web knowledge service

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Signaling pathways in cancer-associated fibroblasts:recent advances and future perspectives

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Cancer Communications 2023年第1期43卷 3-41页

作者： Zengli Fang qingcai Meng Jin Xu Wei Wang Bo Zhang Jiang Liu chen Liang Jie Hua Yingjun Zhao Xianjun Yu Si Shi Department of Pancreatic Surgery Fudan University Shanghai Cancer CenterShanghai 200032P.R.China Department of Oncology Shanghai Medical CollegeFudan UniversityShanghai 200032P.R.China Shanghai Pancreatic Cancer Institute Shanghai 200032P.R.China Pancreatic Cancer Institute Fudan UniversityShanghai 200032P.R.China Institutes of Biomedical Sciences Shanghai Medical CollegeFudan UniversityShanghai 200032P.R.China

As a critical component of the tumor microenvironment(TME),cancerassociated fibroblasts(CAFs)play important roles in cancer initiation and progression.Well-known signaling pathways,including the transforming growth factor-β(TGF-β),Hedgehog(Hh),Notch,Wnt,Hippo,nuclear factor kappa-B(NF-κB),Janus kinase(JAK)/signal transducer and activator of transcription(STAT),mitogen-activated protein kinase(MAPK),and phosphoinositide 3-kinase(PI3K)/AKT pathways,as well as transcription factors,including hypoxia-inducible factor(HIF),heat shock transcription factor 1(HSF1),P53,Snail,and Twist,constitute complex regulatory networks in theTMEtomodulate the formation,activation,heterogeneity,metabolic characteristics and malignant phenotype of CAFs.Activated CAFs remodel the TME and influence the malignant biological processes of cancer cells by altering the transcriptional and secretory characteristics,and this modulation partially depends on the regulation of signaling cascades.The results of preclinical and clinical trials indicated that therapies targeting signaling pathways in CAFs demonstrated promising efficacy but were also accompanied by some failures(e.g.,NCT01130142 and NCT01064622).Hence,a comprehensive understanding of the signaling cascades in CAFs might help us better understand the roles of CAFs and the TME in cancer progression and may facilitate the development of more efficient and safer stroma-targeted cancer therapies.Here,we review recent advances in studies of signaling pathways in CAFs and briefly discuss some future perspectives on CAF research.

关键词： Signaling pathways Cancer-associated fibroblasts Cell-cell interaction Tumor microenvironment Therapeutic targets

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棕碳气溶胶的生消机制研究进展

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环境化学 2020年第10期39卷 2812-2822页

作者：关东杰沈振兴陈庆彩陕西科技大学环境科学与工程学院西安710021 西安交通大学环境科学与工程学院西安710049

在大气气溶胶中,黑碳(BC)是对光辐射有强烈吸收的物质.但近年的研究发现一部分有机碳(OC)在可见光区域也有光吸收,并且吸收强度随波长的减小而骤增,宏观呈现棕黄色,这类有机碳被定义为棕色碳—BrC(brown carbon).鉴于其特殊的吸光特性... 详细信息

在大气气溶胶中,黑碳(BC)是对光辐射有强烈吸收的物质.但近年的研究发现一部分有机碳(OC)在可见光区域也有光吸收,并且吸收强度随波长的减小而骤增,宏观呈现棕黄色,这类有机碳被定义为棕色碳—BrC(brown carbon).鉴于其特殊的吸光特性和光化学反应性,认为它可能对全球气候和大气环境质量具有潜在影响,因此近年来棕碳成为了环境领域一大研究热点.基于过去近三十年的研究,特别是近十年间,棕碳的光学特性、化学组成以及来源已有基本认知,但同时也存在基础研究薄弱、不全面的问题.文章特别指出的是相比于一次排放,目前对棕碳二次生成过程所涉及的前体物、反应机制尚未形成完整和确切的体系,其老化消去过程也亟待明晰.本文总结了目前主要的二次棕碳生成和消去的反应类型和机制,旨在指出棕碳二次生成和消去的最新进展以及存在的主要问题,为将来的研究方向提供借鉴和依据.

关键词：棕色碳二次生成吸光性物质消去来源

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