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关于高校贫困生的心理问题以及对策研究 被引量:2
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作者 徐艺端 《教育与考试》 2007年第5期64-66,共3页
和谐校园是和谐社会的重要组成部分,和谐校园最为关键的是人际关系的和谐,包括个人与个人、个人与群体、群体与群体。而高校贫困生,作为学生当中的一个特殊的群体,有其特有的心理特征。在高校实行招生并轨、收费制度改革后。
关键词 HARMONIOUS CAMPUS POVERTY STUDENTS in heis PSYCHOLOGICAL problems
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基于格网的广州市萝岗区人居环境适宜性评价 被引量:4
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作者 苏华 王云鹏 +3 位作者 陈永品 沈奎 杨静学 马跃良 《中国人口·资源与环境》 CSSCI 北大核心 2010年第S2期107-110,共4页
采用《国家人口发展功能区技术导则》确定的指标体系,在250米格网下,计算了全区的人居环境指数(HEI),并进行了空间格局及空间异质性的比较和分析。结果表明:萝岗区的人居环境指数介于24.32~86.06之间,平均人居环境指数为69.27,总体上... 采用《国家人口发展功能区技术导则》确定的指标体系,在250米格网下,计算了全区的人居环境指数(HEI),并进行了空间格局及空间异质性的比较和分析。结果表明:萝岗区的人居环境指数介于24.32~86.06之间,平均人居环境指数为69.27,总体上属于比较适宜区(HEI范围61~80,占88%),局部地区处于一般适宜区(HEI范围24~60,占11%),局部地区属于高度适宜区(HEI范围81~90,占1%)。研究发现人居环境指数高的地方人口密度也相对较大。HEI指数从大到小顺序为:东区街>夏港街>永和街>九龙镇>萝岗街>联和街。萝岗区人居环境适宜度整体分布态势是:从西向东呈带状递增,从低山、丘陵向台地、平原、河谷递增。 展开更多
关键词 人居环境适宜性 HEI 空间异质性 格网数据 广州市萝岗区
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缩胺基脲衍生物HeI PES和电子结构的研究 被引量:1
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作者 李玮捷 郑世钧 +1 位作者 乔春华 王殿勋 《化学学报》 SCIE CAS CSCD 北大核心 1999年第3期251-257,共7页
利用HeI紫外光电子能谱(PES)首次得到一组缩胺基脲衍生物的PES谱图.并利用RHF(6-31G^(?))计算了它们的电子结构,解析了实验谱,分析和说明与实验电离能所对应的分子轨道的特征.论证了计算结果与实验值间很好的相符关系.并通过实验和计算... 利用HeI紫外光电子能谱(PES)首次得到一组缩胺基脲衍生物的PES谱图.并利用RHF(6-31G^(?))计算了它们的电子结构,解析了实验谱,分析和说明与实验电离能所对应的分子轨道的特征.论证了计算结果与实验值间很好的相符关系.并通过实验和计算结果,讨论了这类化合物取代基的影响和为何缺乏生物活性. 展开更多
关键词 HEI 紫外光电子能谱 缩胺基脲 衍生物 电子结构
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苯并噻唑衍生物的气相HeI紫外光电子能谱(UPS)及量子化学研究 被引量:1
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作者 李晓艳 孟令鹏 +1 位作者 郑世钧 王殿勋 《化学学报》 SCIE CAS CSCD 北大核心 2003年第4期495-498,共4页
对苯并噻唑系列衍生物的气相HeI紫外光电子能谱 (UPS)进行了研究 .首次报道了五种化合物的紫外光电子能谱 ,利用Gaussian 94从头算的量子化学计算方法对其进行了计算 ,并结合计算结果对各个分子体系的谱图进行了指认 .研究结果表明 :分... 对苯并噻唑系列衍生物的气相HeI紫外光电子能谱 (UPS)进行了研究 .首次报道了五种化合物的紫外光电子能谱 ,利用Gaussian 94从头算的量子化学计算方法对其进行了计算 ,并结合计算结果对各个分子体系的谱图进行了指认 .研究结果表明 :分子的电离能受取代基性质的影响 ,取代基的给电子能力越大 ,体系的共轭效应越强 ,电离能就越低 .对苯并噻唑衍生物而言 ,6 位取代基对电离能的影响大于 2 位取代基的影响 . 展开更多
关键词 苯并噻唑衍生物 气相HeI紫外光电子能谱 RHF/6-31G 从头算 量子化学 电子结构
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1,2,3,4-四氯邻苯二甲酸酐的UPS及量子化学研究 被引量:1
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作者 李晓艳 鲁彬 +1 位作者 孟令鹏 郑世钧 《河北师范大学学报(自然科学版)》 CAS 2003年第4期380-381,409,共3页
首次报道了 1,2 ,3 ,4四氯邻苯二甲酸酐的气相HeI紫外光电子能谱 (UPS) .利用Gaussian 94程序RHF方法对其进行了计算指认 ,计算结果分析显示 ,此化合物的第 1个电离峰是由与苯环部分的共轭π键电子电离及羰基的孤对电子电离引起的 ,化... 首次报道了 1,2 ,3 ,4四氯邻苯二甲酸酐的气相HeI紫外光电子能谱 (UPS) .利用Gaussian 94程序RHF方法对其进行了计算指认 ,计算结果分析显示 ,此化合物的第 1个电离峰是由与苯环部分的共轭π键电子电离及羰基的孤对电子电离引起的 ,化合物的第 2 ,3谱峰与羰基的孤对电子峰相关联 ,说明羰基为此类化合物的特征基团 .经调整轨道指数的STO 展开更多
关键词 1 2 3 4-四氯邻苯二甲酸酐 UPS 量子化学计算 气相HeI紫外光电子能谱 电子结构 构型 构象 成键特性
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自动发药机在我院门诊药房实践与体会 被引量:13
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作者 王存伟 《药学研究》 CAS 2017年第3期177-179,共3页
目的评价门诊全自动发药机应用于门诊药房前后的工作变化。方法在自动发药机使用前后各90个工作日内观察门诊药房药品调剂流程的变化,统计和分析调剂、复核等环节的时间和处方调配差错率,估算门诊全自动发药机应用后门诊药房工作的改观... 目的评价门诊全自动发药机应用于门诊药房前后的工作变化。方法在自动发药机使用前后各90个工作日内观察门诊药房药品调剂流程的变化,统计和分析调剂、复核等环节的时间和处方调配差错率,估算门诊全自动发药机应用后门诊药房工作的改观情况。结果使用门诊全自动发药机以后,服务质量有明显改善,工作效率有明显提高。结论要进一步发挥门诊全自动发药机的优势,需要改进管理模式和改善运行环境。 展开更多
关键词 自动发药机 门诊药房 工作变化 韦乐海茨
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苯多烯基硝基系列化合物的HeI紫外光电子能谱(UPS)研究
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作者 王殿勋 李颖 +1 位作者 郑世钧 徐广智 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 1994年第6期513-518,共6页
本文报道具有反向端基的本多烯基硝基系列化合物X=-NO2,-CHO,-COCH_3)的气相HeI紫外光电子能谱(UPS).UPS谱的指认借助于已有报道的与此有关的小分子的UPS结果以及对每个研究分子的MNDO计算.不... 本文报道具有反向端基的本多烯基硝基系列化合物X=-NO2,-CHO,-COCH_3)的气相HeI紫外光电子能谱(UPS).UPS谱的指认借助于已有报道的与此有关的小分子的UPS结果以及对每个研究分子的MNDO计算.不同端基分子的最低UPS实验电离能(IP)不但随分子中端基效应的减弱和分子中乙烯基数目的增加呈递降关系,而且指出与乙烯基直接相连的-X为端基.而与苯环相连的-NO2基为反向端基的理论和实验基础. 展开更多
关键词 苯多烯基 硝基 UPS HEI MNDO计算
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大宇希望Espero高能点火(HEI)系统的检修
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作者 汪立亮 王占伟 《汽车与配件》 1998年第31期19-19,18,共2页
一、HEI点火系统简介 大宇希望高能点火(HEI)系统的特征是使用了HEI分电器。在HEI(EST)分电器中所有点火正时调整是由电子控制模块(ECM)完成的,ECM可从各种发动机传感器测到信息,计算出正确的点火正时,并传递信号给分电器,相应地改变点... 一、HEI点火系统简介 大宇希望高能点火(HEI)系统的特征是使用了HEI分电器。在HEI(EST)分电器中所有点火正时调整是由电子控制模块(ECM)完成的,ECM可从各种发动机传感器测到信息,计算出正确的点火正时,并传递信号给分电器,相应地改变点火正时。另有辅助点火提前系统,可在ECM失灵时为点火模块发送信号,不再使用真空或机械式点火提前装置。 二。 展开更多
关键词 轿车 点火系统 HEI 检修 分电器
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贫困线视角下农村居民收入对膳食健康的影响研究——基于CHNS数据的微观实证 被引量:6
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作者 李雷 白军飞 张彩萍 《农业现代化研究》 CSCD 北大核心 2020年第1期93-103,共11页
我国农村居民已基本解决温饱问题,但其膳食健康状况仍缺乏应有的关注,因此分析收入增长对农村居民膳食健康的影响有着重要的现实意义。基于家庭生产理论,利用中国营养与健康调查(CHNS)数据和健康膳食指数(HEI),运用最小二乘虚拟变量回... 我国农村居民已基本解决温饱问题,但其膳食健康状况仍缺乏应有的关注,因此分析收入增长对农村居民膳食健康的影响有着重要的现实意义。基于家庭生产理论,利用中国营养与健康调查(CHNS)数据和健康膳食指数(HEI),运用最小二乘虚拟变量回归、门槛回归模型和工具变量回归方法,评估我国农村居民的膳食健康状况,分析收入对农村居民膳食健康的影响,对比分析贫困居民与非贫困居民之间的影响差异,从膳食健康视角评估当前贫困线标准的合理性。结果表明:农村贫困居民与非贫困居民的膳食健康状况存在显著差异,非贫困居民的膳食健康状况明显优于贫困居民;收入对农村居民的膳食健康具有显著的促进作用,贫困居民膳食健康的收入效应明显高于非贫困居民;收入与农村居民的膳食健康存在内生性,不考虑内生性会低估农村居民膳食健康的收入效应;从膳食健康的角度来看,我国的贫困线标准应提升至3159元,高于当前的贫困线标准(2011年为2300元)。因此,对于农村居民,收入的持续增长仍是改善农村贫困人口膳食健康的重要途径。如果计划对贫困人口的营养状况进行政策干预,现有的贫困线有必要进行上调。 展开更多
关键词 收入水平 贫困线 膳食健康 HEI指数 门槛回归 工具变量回归
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Use of Component Integration Services in Multidatabase Systems: A Feasible Solution for Integrating Academic Institutions or Commercial Industries
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作者 Mohammad Ghulam Ali Mohammad Ghulam Murtuza 《Journal of Software Engineering and Applications》 2023年第11期561-585,共25页
The book chapter is an extended version of the research paper entitled “Use of Component Integration Services in Multidatabase Systems”, which is presented and published by the 13<sup>th</sup> ISITA, the... The book chapter is an extended version of the research paper entitled “Use of Component Integration Services in Multidatabase Systems”, which is presented and published by the 13<sup>th</sup> ISITA, the National Conference of Recent Trends in Mathematical and Computer Sciences, T.M.B. University, Bhagalpur, India, January 3-4, 2015. Information is widely distributed across many remote, distributed, and autonomous databases (local component databases) in heterogeneous formats. The integration of heterogeneous remote databases is a difficult task, and it has already been addressed by several projects to certain extents. In this chapter, we have discussed how to integrate heterogeneous distributed local relational databases because of their simplicity, excellent security, performance, power, flexibility, data independence, support for new hardware technologies, and spread across the globe. We have also discussed how to constitute a global conceptual schema in the multidatabase system using Sybase Adaptive Server Enterprise’s Component Integration Services (CIS) and OmniConnect. This is feasible for higher education institutions and commercial industries as well. Considering the higher educational institutions, the CIS will improve IT integration for educational institutions with their subsidiaries or with other institutions within the country and abroad in terms of educational management, teaching, learning, and research, including promoting international students’ academic integration, collaboration, and governance. This will prove an innovative strategy to support the modernization and large expansion of academic institutions. This will be considered IT-institutional alignment within a higher education context. This will also support achieving one of the sustainable development goals set by the United Nations: “Goal 4: ensure inclusive and quality education for all and promote lifelong learning”. However, the process of IT integration into higher educational institutions must be thoroughly evaluated, identifying the vital data access points. In this chapter, Section 1 provides an introduction, including the evolution of various database systems, data models, and the emergence of multidatabase systems and their importance. Section 2 discusses component integration services (CIS), OmniConnect and considering heterogeneous relational distributed local databases from the perspective of academics, Section 3 discusses the Sybase Adaptive Server Enterprise (ASE), Section 4 discusses the role of component integration services and OmniConnect of Sybase ASE under the Multidatabase System, Section 5 shows the database architectural framework, Section 6 provides an implementation overview of the global conceptual schema in the multidatabase system, Section 7 discusses query processing in the CIS, and finally, Section 8 concludes the chapter. The chapter will help our students a lot, as we have discussed well the evolution of databases and data models and the emergence of multidatabases. Since some additional useful information is cited, the source of information for each citation is properly mentioned in the references column. 展开更多
关键词 Relational Database Component Integration Services OmniConnect MULTIDATABASE Global Conceptual Schema Distributed Database Local Conceptual Schema Database Integration IT Integration Higher Education Commercial Industries heis
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基于GIS的天山北坡城市群人居环境自然适宜性评价 被引量:6
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作者 赵永玉 阿里木江·卡斯木 +1 位作者 高鹏文 梁洪武 《生态科学》 CSCD 2023年第5期84-93,共10页
以GIS为平台,使用5 km×5 km栅格单元为基本单位,选择土地覆被、地形起伏度、气候适宜度、水文条件以及土地沙化适宜度等自然因子结合社会经济数据,对天山北坡不同地区的人居环境适宜性进行探讨,揭示了天山北坡人居环境自然适宜性... 以GIS为平台,使用5 km×5 km栅格单元为基本单位,选择土地覆被、地形起伏度、气候适宜度、水文条件以及土地沙化适宜度等自然因子结合社会经济数据,对天山北坡不同地区的人居环境适宜性进行探讨,揭示了天山北坡人居环境自然适宜性的空间分布格局,并进一步探讨其形成的原因。结果表明:天山北坡城市群的人居环境指数(HEI)介于10.72—80.19之间,地形起伏度、水文条件以及土地沙化适宜度为天山北坡城市群人居环境自然适宜性空间分布差异的主要限制因素,人居环境自然适宜性整体呈现“屋脊式”空间结构特征,具体表现为以乌鲁木齐市-奎屯市为中轴线逐渐向两侧递减的态势,并出现以石河子市、奎屯市为“双核心式”的空间差异特征。其中一般适宜区域分布面积最广,占天山北坡城市群总面积的39.79%;比较适宜区次之,占25.2%,分布着研究区43.87%的人口;然后是临界适宜区,占18%;不适宜区域占研究区总面积10.8%;高度适宜区最小,仅为研究区总面积的6.19%。 展开更多
关键词 人居环境自然适宜性 HEI模型 GIS 天山北坡城市群
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乌苏拉·海塞:《想象灭绝:濒危物种的文化意义》(英文)
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作者 Sophie D.Christman 《国际比较文学(中英文)》 2018年第3期489-491,共3页
When Ursula K.Heise's now canonic text Sense of Place and Sense of Planet:The Environmental Imagination of the Global was first published in 2008,I was a doctoral student at SUNY Stony Brook writing seminar papers... When Ursula K.Heise's now canonic text Sense of Place and Sense of Planet:The Environmental Imagination of the Global was first published in 2008,I was a doctoral student at SUNY Stony Brook writing seminar papers on Victorian perspectives of nature.In that second wave of Anglophone ecocriticism,those of us working in the newly incubated environmental humanities were thrilled to engage with the wide-ranging scope of Heise's book,whose aims included the theorization and revisioning of cultural and political attachments to planetary notions of place. 展开更多
关键词 乌苏拉·海塞 URSULA K.heise 《想象灭绝:濒危物种的文化意义》
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FC(O)SNCO的电子结构和光电离解离过程(英文)
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作者 赵春红 佟胜睿 +1 位作者 葛茂发 孙政 《物理化学学报》 SCIE CAS CSCD 北大核心 2015年第1期23-31,共9页
由于拥有―C(O)S―和―NCO基团,FC(O)SNCO的分子和电子结构是非常有趣的.利用FC(O)SCl和Ag NCO制备了FC(O)SNCO,并利用He I光电子能谱(PES)、光电离质谱(PIMS)以及理论计算研究了其分子和电子结构.通过将实验、理论计算以及自然键轨道(N... 由于拥有―C(O)S―和―NCO基团,FC(O)SNCO的分子和电子结构是非常有趣的.利用FC(O)SCl和Ag NCO制备了FC(O)SNCO,并利用He I光电子能谱(PES)、光电离质谱(PIMS)以及理论计算研究了其分子和电子结构.通过将实验、理论计算以及自然键轨道(NBO)分析结合起来,获得了FC(O)SNCO的最稳定分子构型.利用外壳层格林函数(OVGF)方法以及与相似化合物的比较,对其光电子能谱进行了指认.理论计算表明,对于中性分子最稳定的构型为syn-syn非平面构型,而电离后的离子最稳定构型为syn-syn平面构型.实验结果表明,第一电离能来自于S的孤对电子轨道,为10.33 e V.第二至第六电离能分别为12.03、13.23、13.77、14.78、15.99 e V,并对这些电离能进行了指认.在光电离质谱中产生了六个质谱峰,分别为SN+、FC(O)+、SNCO+、FC(O)SN+、C(O)SNCO+、FC(O)SNCO+,其中FC(O)SNCO+的峰是最强峰.结合HeI光电子能谱和理论计算,对PIMS进行了分析,并研究了可能的电离和解离过程并对其进行了讨论. 展开更多
关键词 结构 HeI光电子能谱 光电离质谱 理论计算 电离和解离过程
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A New Eusauropod Dinosaur from the Lower Cretaceous of Guangxi Province,Southern China 被引量:6
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作者 MO Jinyou XU Xing Eric BUFFETAUT 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2010年第6期1328-1335,共8页
A new sauropod dinosaur,Liubangosaurus hei gen.et sp.nov.,is erected based on a specimen represented by five articulated middle-caudal dorsal vertebrae,which was discovered in the Lower Cretaceous Napai Formation of G... A new sauropod dinosaur,Liubangosaurus hei gen.et sp.nov.,is erected based on a specimen represented by five articulated middle-caudal dorsal vertebrae,which was discovered in the Lower Cretaceous Napai Formation of Guangxi Province,southern China.This new taxon is diagnosed by a unique combination of derived features:prezygapophysis closely contacts with parapophysis,with the prdl and prpl absent;presence of cavity on the dorsal surface of the diapophysis;neural spine very low,with its distal end level with that of diapophysis;distal end of the neural spine strongly expanded laterally to form a platform;marked fossa formed between the infradiapophyseal lamina and the parapophysis;broad,flat area of featureless bone on lateral surface of neural arch;vertically directed infradiapophyseal lamina expands or bifurcates ventrally to form a inverted "Y";highly positioned parapophyses large and tear-drop in shape.The discovery of this new taxon increases the diversity of sauropods in China during the Early Cretaceous. 展开更多
关键词 Eusauropoda Liubangosaurus hei Napai Formation Early Cretaceous GUANGXI China
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Interactions of drug-metabolizing enzymes with the Chinese herb Psoraleae Fructus 被引量:12
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作者 ZHOU Qi-Hang ZHU Ya-Di +5 位作者 ZHANG Feng SONG Yun-Qing JIA Shou-Ning ZHU Liang FANG Sheng-Quan GE Guang-Bo 《Chinese Journal of Natural Medicines》 SCIE CAS CSCD 2019年第11期858-870,共13页
Psoraleae Fructus(the dried fruits of Psoralea corylifolia), one of the most frequently used Chinese herbs in Asian countries, has a variety of biological activities. In clinical settings, Psoraleae Fructus or Psorale... Psoraleae Fructus(the dried fruits of Psoralea corylifolia), one of the most frequently used Chinese herbs in Asian countries, has a variety of biological activities. In clinical settings, Psoraleae Fructus or Psoraleae Fructus-related herbal medicines frequently have been used in combination with a number of therapeutic drugs for the treatment of various human diseases, such as leukoderma, rheumatism and dysentery. The use of Psoraleae Fructus in combination with drugs has aroused concern of the potential risks of herb-drug interactions(HDI) or herb-endobiotic interactions(HEI). This article reviews the interactions between human drug-metabolizing enzymes and the constituents of Psoraleae Fructus;the major constituents in Psoraleae Fructus, along with their chemical structures and metabolic pathways are summarized, and the inhibitory and inductive effects of the constituents in Psoraleae Fructus on human drug-metabolizing enzymes(DMEs), including target enzyme(s), its modulatory potency, and mechanisms of action are presented. Collectively, this review summarizes current knowledge of the interactions between the Chinese herb Psoraleae Fructus and therapeutic drugs in an effort to facilitate its rational use in clinical settings, and especially to avoid the potential risks of HDI or HEI through human DMEs. 展开更多
关键词 Psoraleae Fructus Cytochrome P450 enzymes(CYPs) Uridine diphosphate-glucuronosyltransferases(UGTs) Herb-drug interactions(HDI) Herb-endobiotic interactions(HEI)
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PAN和PPN的HeI光电子能谱(PES)
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作者 李益民 李海洋 +1 位作者 孙巧 王殿勋 《化学学报》 SCIE CAS CSCD 北大核心 2003年第9期1492-1495,共4页
给出了两个重要的大气污染化合物PAN和PPN的紫外光电子能谱 (PES) .为了指认PES谱 ,对两个分子实施了HF和OVGF方法的理论计算 ,并给出了它们各自的优化几何构型 .PES谱低电离能区的两个分离峰 (PAN为 11.42eV和 12 .0 7eV ;PPN为 11.0 ... 给出了两个重要的大气污染化合物PAN和PPN的紫外光电子能谱 (PES) .为了指认PES谱 ,对两个分子实施了HF和OVGF方法的理论计算 ,并给出了它们各自的优化几何构型 .PES谱低电离能区的两个分离峰 (PAN为 11.42eV和 12 .0 7eV ;PPN为 11.0 8eV和 11.79eV)被归于分子中主要体现“NO2 ”基团贡献的最高占有分子轨道 (HOMO)和次最高占有分子轨道 (SHOMO)电子电离作用结果 .而PPN的第一电离能 11.0 8eV低于PAN的 11.42eV ,是由于PPN分子中增加的“CH2 ”基团电子的给予作用 ,这为PPN应具有较大的生物毒性提供合理的解释 . 展开更多
关键词 PAN PPN HeI光电子能谱 从头计算 OVGF计算 大气污染化合物 分子轨道 光化学烟雾
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The Variability of the Snow and Ice Melt in Alpine Rivers in Northwestern China 被引量:2
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作者 LI Chang-bin QI Jia-guo +3 位作者 YANG Lin-shan YANG Wen-jin ZHU Gao-feng WANG Shuai-bing 《Journal of Mountain Science》 SCIE CSCD 2014年第4期884-895,共12页
The study of snow and ice melt (SIM) is important in water-scarce arid regions for the assessment of water supply and quality. These studies involve unique difficulties, especially in the calibration of hydro-models... The study of snow and ice melt (SIM) is important in water-scarce arid regions for the assessment of water supply and quality. These studies involve unique difficulties, especially in the calibration of hydro-models because there is no direct way to continuously measure the SIM at hydrostations. The recursive digital filter (RDF) and the isotopic hydro-geochemical method (IHM) were coupled to separate the SIM from eight observed series of alpine streamflows in northwestern China. Validation of the calibrated methods suggested a good capture of the SIM characteristics with fair accuracy in both space and time. Applications of the coupled methods in the upper reaches of the Hei River Basin (HRB) suggested a double peak curve of the SIM fraction to streamflow for the multi-component recharged (MCR) rivers, while a single peak curve was suggested for the rainfall-dominant recharged (RDR) rivers. Given inter-annual statistics of the separation, both types of the alpine rivers have experienced an obvious decrease of SIM since 196os. In the past 10 years, the SIM in the two types of rivers has risen to the levels of the 1970s, but has remained lower than the level of the 1960s. The study provided a considerable evidence to quantify the alpine SIMbased on the separation of observed data series at gauge stations. Application of the coupled method could be helpful in the calibration and validation of SIM-related hydro-models in alpine regions. 展开更多
关键词 Recursive digital filter (RDF) Isotopichydro-geochemical method (IHM) Snow and ice melt Separation the Hei River Basin
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Accelerated Thinning of Hei Valley No. 8 Glacier in the Tianshan Mountains,China 被引量:1
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作者 武震 刘时银 +1 位作者 张世强 上官冬辉 《Journal of Earth Science》 SCIE CAS CSCD 2013年第6期1044-1055,共12页
Two field surveys on the thickness of Hei Valley No. 8 Glacier (H8) on the southern slope of Mount Bogda in the Tianshan Mountains using ground-penetration radar (GPR) were carried out in August 2008 and Septembe... Two field surveys on the thickness of Hei Valley No. 8 Glacier (H8) on the southern slope of Mount Bogda in the Tianshan Mountains using ground-penetration radar (GPR) were carried out in August 2008 and September 2009. Comparisons of the observed change in glacier thickness using GPR and ablation stakes suggest that GPR observations have high accuracy. Thus, the thickness change for H8 during 2008-2009 was estimated using GPR data. Digital elevation models obtained from topographic maps and the Shuttle Radar Topography Mission were used to analyze ice-elevation changes of H8 between 1 969 and 2 000 m a.s.l.. The results show that H8 has continually thinned, and the thinning rate has increased gradually. The thinning of ablation areas of H8 increased from 0.42a=0.56 m/a in 1969-2000 to 1.474-0.79 m/a in 2000-2008, and then accelerated to 1.924-0.98 m/a in 2008-2009. The retreat of the glacier terminus has had a similar pattern. The distribution of the temperate-ice zone of H8 as determined from GPR data also implies that H8 has experienced strong melting from 2008 to 2009, which indicates that temperature rises have not only enhanced glacial sur- face melting and prolonged melting periods, but also changed the englacial structure and increased the water content of glacier, both of which probably lead to the acceleration of glacial thinning. 展开更多
关键词 Hei Valley No. 8 Glacier (H8) ground-penetrating radar ice-elevation change thinningretreat Tianshan.
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A Multiphase Mixed Methods Approach to the Internationalization of Higher Education in South Africa:Outline of a Discursive Research Framework 被引量:1
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作者 Lizl Steynberg Jan Grundling +1 位作者 Bing Liu Yuan Li 《Journal of Tourism and Hospitality Management》 2019年第3期101-119,共19页
Higher education internationalization(HEI)has become an important priority for global decision makers and education providers.Persuaded by globalization,HEI is a political strategy and economic prospect for countries,... Higher education internationalization(HEI)has become an important priority for global decision makers and education providers.Persuaded by globalization,HEI is a political strategy and economic prospect for countries,governments,and universities to position themselves in global markets.The purpose of this paper is to provide a methodological pathway to develop a dynamic,reformed South African HEI framework based on the transformative drive(i.e.,adjustment of change,learning,shared knowledge,internationalization,globalization an institutionalized memory)of HEI in China.The interpretivist paradigm constitutes the basic research approach.Quantitative and qualitative data will be collected,analyzed,and integrated using a multiphase mixed methods approach.This approach consists of three phases including content analysis(Phase I),in-depth interviews(Phase II),and surveys(Phase III),which answers the focal research question.The significance of this research includes creating a better understanding of South African higher education(HE)policy issues from a transformational perspective,contributing to theory on how internationalization affects HE’s position in economic and social development and broadening knowledge and understanding of the unique circumstances and challenges of HEI in developing countries,particularly in countries seeking to position themselves in the globalized knowledge economy. 展开更多
关键词 HIGHER EDUCATION internationalization(HEI) HIGHER education(HE) MULTIPHASE mixed methods transformative forces reformative framework
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凝汽器配套液环真空泵的应用及相关设计计算 被引量:1
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作者 于泳水 《水泵技术》 2022年第2期30-33,42,共5页
本文介绍了液环真空泵在电厂抽吸和维持凝汽器真空的工艺流程,比较了美国热交换学会HEI和德电联VDEW对凝汽器允许泄漏干空气气量的差异。给出凝汽器内部干空气和水蒸气的体积、质量及温度修正系数的计算方法,另外也对凝汽器配套真空泵... 本文介绍了液环真空泵在电厂抽吸和维持凝汽器真空的工艺流程,比较了美国热交换学会HEI和德电联VDEW对凝汽器允许泄漏干空气气量的差异。给出凝汽器内部干空气和水蒸气的体积、质量及温度修正系数的计算方法,另外也对凝汽器配套真空泵运行过程中产生的热量及工作液温升的计算方法提出自己的见解。 展开更多
关键词 液环真空泵 凝汽器 美国热交换学会HEI 德电联VDEW
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