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公共健康权益可及性对少数民族流动人口定居意愿的影响
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作者 刘金华 王棫冰 徐典 《西北人口》 北大核心 2024年第1期35-47,共13页
以人口高质量发展支撑中国式现代化,提高人口整体素质是关键。而流动人口公共健康权益的可获得性和可及性程度又是增强流动人口身体素质、定居意愿、城市融入的关键因素。通过分析2018年全国流动人口动态监测数据(China Migrants Dynami... 以人口高质量发展支撑中国式现代化,提高人口整体素质是关键。而流动人口公共健康权益的可获得性和可及性程度又是增强流动人口身体素质、定居意愿、城市融入的关键因素。通过分析2018年全国流动人口动态监测数据(China Migrants Dynamic Survey,简称CMDS),聚焦少数民族流动人口在流入地公共健康权益的现状,进一步使用二分变量对数比回归模型实证分析少数民族流动家庭公共健康权益可及性对定居意愿发生比的影响,关注家庭主要劳动力(个体)和家庭其他成员(幼童、孕产妇)公共健康权益可及性对少数民族流动人口定居意愿的影响,并探讨不同特征的少数民族流动人口健康权益可及性对家庭定居意愿的异质性影响。研究发现:一是公共健康权益可获得性、可及性程度对少数民族流动人口定居意愿存在显著正向影响,且影响效应存在差异。家庭成员公共健康权益的影响效应大于个体影响效应,但孕产妇公共健康权益可获得性与家庭定居意愿没有显著相关关系。二是不同健康权益项目对单个个体健康权益可及性的影响权重不同。健康档案项目对个体公共健康权益的影响效应最大,疫苗接种项目对幼童公共健康权益的影响效应最大,孕产妇四项公共健康权益项目的作用相差不大。三是不同个体获得公共健康权益数量越多,其定居意愿发生比越高,但影响效应不同。公共健康权益可及性程度对于受教育程度低、夫妻两地分居、省内跨市流动的少数民族流动人口定居意愿的影响更大。 展开更多
关键词 公共健康权益可及性 定居意愿 发生比 少数民族流动人口
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The magnetosheath at high spectral resolution 被引量:1
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作者 K.D.Küntz D.Koutroumpa +4 位作者 W.R.Dunn A.Foster F.S.Porter D.G.Sibeck B.Walsh 《Earth and Planetary Physics》 EI CSCD 2024年第1期234-246,共13页
While we eagerly anticipate SMILE’s(Solar wind Magnetosphere Ionosphere Link Explorer)unprecedented X-ray observations of the Earth’s magnetosheath and the initiation of a new era of magnetospheric research,it seems... While we eagerly anticipate SMILE’s(Solar wind Magnetosphere Ionosphere Link Explorer)unprecedented X-ray observations of the Earth’s magnetosheath and the initiation of a new era of magnetospheric research,it seems appropriate to look ahead to the abilities of the next generation of astrophysics missions.Of these,the Line Emission Mapper(LEM),a large aperture micro-calorimeter based mission,is currently planned to be able to observe the magnetosheath at high spectral resolution(~2 eV).With a field of view of~30′,LEM will allow higher spatial resolution and higher cadence measurement of the motion of a very small portion of the magnetopause over relatively short periods of time(multiple hours),complementing SMILE’s global mapping.LEM’s strength is its spectral resolution.It will be able to measure the abundance of a broad range of elements and ionization states,many of which are inaccessible to current in situ instruments,and will be able to separate the emission from the magnetosheath from the emission from the cosmic X-ray background using the difference in their relative velocities. 展开更多
关键词 MAGNETOSHEATH charge exchange solar wind abundances
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The Impact of Digital Technology on Healthcare Delivery and Patient Outcomes
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作者 Taiwo Raheemah Alawiye 《E-Health Telecommunication Systems and Networks》 2024年第2期13-22,共10页
Digital technology has fundamentally transformed healthcare delivery, exerting profound influence on patient outcomes. This paper delves into the roles played by telemedicine, electronic health records (EHRs), and mob... Digital technology has fundamentally transformed healthcare delivery, exerting profound influence on patient outcomes. This paper delves into the roles played by telemedicine, electronic health records (EHRs), and mobile health applications in augmenting healthcare services. The objective is to scrutinize the ways in which these digital innovations enhance healthcare delivery and patient outcomes, while also identifying the attendant challenges in their adoption. To achieve this, a rigorous literature review encompassing peer-reviewed articles, reports, and case studies that examine the impact of digital technology in healthcare settings was conducted. The findings underscore that digital technology significantly bolsters patient care by enhancing access, operational efficiency, and diagnostic accuracy. Nonetheless, persistent challenges such as safeguarding data privacy, ensuring interoperability across systems, and managing implementation costs continue to pose significant hurdles. 展开更多
关键词 Digital Technology Healthcare Delivery Patient Outcomes
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A Transmission and Transformation Fault Detection Algorithm Based on Improved YOLOv5 被引量:1
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作者 Xinliang Tang Xiaotong Ru +1 位作者 Jingfang Su Gabriel Adonis 《Computers, Materials & Continua》 SCIE EI 2023年第9期2997-3011,共15页
On the transmission line,the invasion of foreign objects such as kites,plastic bags,and balloons and the damage to electronic components are common transmission line faults.Detecting these faults is of great significa... On the transmission line,the invasion of foreign objects such as kites,plastic bags,and balloons and the damage to electronic components are common transmission line faults.Detecting these faults is of great significance for the safe operation of power systems.Therefore,a YOLOv5 target detection method based on a deep convolution neural network is proposed.In this paper,Mobilenetv2 is used to replace Cross Stage Partial(CSP)-Darknet53 as the backbone.The structure uses depth-wise separable convolution to reduce the amount of calculation and parameters;improve the detection rate.At the same time,to compensate for the detection accuracy,the Squeeze-and-Excitation Networks(SENet)attention model is fused into the algorithm framework and a new detection scale suitable for small targets is added to improve the significance of the fault target area in the image.Collect pictures of foreign matters such as kites,plastic bags,balloons,and insulator defects of transmission lines,and sort theminto a data set.The experimental results on datasets show that themean Accuracy Precision(mAP)and recall rate of the algorithm can reach 92.1%and 92.4%,respectively.At the same time,by comparison,the detection accuracy of the proposed algorithm is higher than that of other methods. 展开更多
关键词 Transmission line YOLOv5 multi-scale integration SENet
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Bonding, Structure and Uses of Metals
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作者 Peter F.Lang 《Journal of Metallic Material Research》 2023年第1期7-15,共9页
This work briefly describes some of the different features of groups of metals.It highlights recent progress in research into metals.It details the structures and defects in solid metals.The common theories of metals ... This work briefly describes some of the different features of groups of metals.It highlights recent progress in research into metals.It details the structures and defects in solid metals.The common theories of metals including the free electron theory,band theory,the ions in a sea of electrons model and the soft sphere model are discussed and their merits are considered.It describes distinctions between the bonding in metals and inter-metallic compounds.It shows the influence of bonding on the properties of metals and alloys and provides a summary of tradition and newer uses of metals. 展开更多
关键词 METALS ALLOYS Inter-metallic compounds Bonding strucuture
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基于东道国吸收能力的FDI技术溢出效应 被引量:47
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作者 黄凌云 范艳霞 刘夏明 《中国软科学》 CSSCI 北大核心 2007年第3期30-34,共5页
本文采用面板数据分析方法对外商直接投资(FDI)的技术溢出效应与基于技术水平的吸收能力之间的关系进行实证分析。结果发现。东道国技术水平的提高对 FDI 的技术溢出有明显促进作用,表明吸收能力的重要性。但当东道国技术水平达到一定... 本文采用面板数据分析方法对外商直接投资(FDI)的技术溢出效应与基于技术水平的吸收能力之间的关系进行实证分析。结果发现。东道国技术水平的提高对 FDI 的技术溢出有明显促进作用,表明吸收能力的重要性。但当东道国技术水平达到一定程度后,FDI 的溢出效应则开始减弱,即吸收能力与溢出效应间存在非线性关系。 展开更多
关键词 技术溢出 FDI 吸收能力
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一种研究蛋白质晶体中分子堆积的图形程序—PACKING
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作者 汪大伟 H.P.C.Driessen I.J.Tickle 《生物物理学报》 CAS CSCD 北大核心 1992年第1期121-127,共7页
在蛋白质晶体结构研究中常需分析分子在晶胞内的堆积,本文介绍一种用于IRIS-4D计算机的图形软件,可显示分子在晶胞中的堆积图形、计算原子之间的距离和键角等,进行分子置换、模拟不同的分子堆积模型。
关键词 蛋白 晶体 分子堆积
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人权的终结 被引量:6
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作者 科斯塔斯.杜兹纳 季乐宇 《南京大学法律评论》 2003年第20期21-36,共16页
人权的历史已经在与统治和压迫的抗争中走向其终结。自前现代以来,自然权利奠定了现代国家主权的基础。这一趋势在后现代日趋显著,人权也已成为正在构筑中的新世界的道德秩序。从哲学的视角看来,人性是一个模糊的概念,不能作为规范性价... 人权的历史已经在与统治和压迫的抗争中走向其终结。自前现代以来,自然权利奠定了现代国家主权的基础。这一趋势在后现代日趋显著,人权也已成为正在构筑中的新世界的道德秩序。从哲学的视角看来,人性是一个模糊的概念,不能作为规范性价值的渊源。普遍主义和文化相对主义如同人道主义之树上相互纠结的枝蔓,无法将人权作为个体欲望的立法加以理解。在后现代,人权运动跨越了社会的分野,同时也解构了其支配的主体。只有当我们将人权视为赖于他者而存在,人权方能回归至其原初的目标而成为后现代的正义准则。 展开更多
关键词 人权 自然权利 主权 普遍道德 政治斗争 人道主义 “人”的权利 文化相对主义 同一性 欲望 正义准则
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Wavelet estimation by matching well-log,VSP,and surfaceseismic data
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作者 马宏达 Roy E.White 胡天跃 《Applied Geophysics》 SCIE CSCD 2010年第4期384-391,401,共9页
In this paper,we present a method of wavelet estimation by matching well-log, VSP,and surface-seismic data.It's based on a statistical model in which both input and output are contaminated with additive random noise.... In this paper,we present a method of wavelet estimation by matching well-log, VSP,and surface-seismic data.It's based on a statistical model in which both input and output are contaminated with additive random noise.A coherency matching technique is used to estimate the wavelet.Measurements of goodness-of-fit and accuracy provide tools for quality control.A practical example suggests that our method is robust and stable.The matching and estimation of the wavelet is reliable within the seismic bandwidth.This method needs no assumption on the wavelet amplitude and phase and the main advantage of the method is its ability to determine phase. 展开更多
关键词 coherency matching technique VSP data wavelet estimation MATCHING
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Foreign Language Enjoyment and Anxiety:Associations With General and Domain-Specific English Achievement 被引量:2
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作者 Jean-Marc DEWAELE Chengchen LI 《Chinese Journal of Applied Linguistics》 2022年第1期32-48,150,共18页
Recent research has confirmed the predictive effect of general foreign language(FL) achievement on Foreign Language Enjoyment(FLE) and Foreign Language Classroom Anxiety(FLCA).However,few studies have examined the eff... Recent research has confirmed the predictive effect of general foreign language(FL) achievement on Foreign Language Enjoyment(FLE) and Foreign Language Classroom Anxiety(FLCA).However,few studies have examined the effect of domain-specific language achievement in shaping FL learning emotions.The present study thus aims to examine how FLE and FLCA are linked to overall FL achievement and self-perceived achievement in six different domains across listening,speaking,reading,writing,vocabulary,and grammar.A total of 1,415 Chinese senior secondary students participated in the questionnaire survey.Regression analyses showed that 1) both FLE and FLCA were predicted more by self-perceived general English proficiency,while less by actual English achievement;2) perceptions of speaking and grammar competence were significant predictors of both emotions;3) perceived reading competence predicted FLE significantly but not FLCA;and that 4) perceptions of listening,writing,and vocabulary competence predicted neither FLE nor FLCA.The implication is that domain-specificity should be taken into consideration in future explorations of FL emotions. 展开更多
关键词 foreign language enjoyment foreign language(classroom)anxiety positive psychology control-value theory
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早期经验对繁衍策略形成与发展的影响(英文) 被引量:1
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作者 Jay Belsky 《心理学报》 CSSCI CSCD 北大核心 2007年第3期454-468,共15页
很多发展心理学家探讨了早期经验与心理行为发展的关系,但这些发展心理学家较少以进化理论为指导来探讨不同发展阶段的心理行为特点。比如,配偶选择、性交往与父母教养等成果颇丰的研究领域均缺少以进化理论为基础的理论解释。与主流的... 很多发展心理学家探讨了早期经验与心理行为发展的关系,但这些发展心理学家较少以进化理论为指导来探讨不同发展阶段的心理行为特点。比如,配偶选择、性交往与父母教养等成果颇丰的研究领域均缺少以进化理论为基础的理论解释。与主流的发展心理学研究不同,Draper 和 Harpending (1982),Ellis (2004),Chisholm (1996) 和 Belsky 等(1991)以进化理论为基础探讨了早期经验与繁衍策略对儿童心理行为发展的影响。进化观点认为儿童在家庭中获得的早期经验会影响身体发育与未来的繁衍策略。Ellis(2004)已经证实女性青春期确实与早期家庭经验有关。 展开更多
关键词 发展心理学 青春期时间表 进化观点
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Distribution and concentrations of anthropogenic platinum group elements in the surface environment of Hong Kong 被引量:1
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作者 Nurdan S. Duzgoren-Aydin Steve Edwards +3 位作者 Karen A. Hudson-Edwards Eveline de VOS Adnan Aydin John Malpas 《Chinese Journal Of Geochemistry》 EI CAS 2006年第B08期108-108,共1页
关键词 白金 元素 地球化学 沉积物 地表环境
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基于关联分析的铁路旅客同行预测方法 被引量:1
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作者 李思颖 徐杨 +1 位作者 王欣 赵若成 《计算机科学》 CSCD 北大核心 2021年第9期95-102,共8页
随着运输技术的快速发展,铁路已成为人们出差、度假、探亲时选择的主要出行方式之一。与此同时,旅客共同出行(以下简称同行)的行为特征也越来越普遍。依据旅客间的同行关系,可以构建同行关系网络;而对该网络中潜在的链接进行预测,将有... 随着运输技术的快速发展,铁路已成为人们出差、度假、探亲时选择的主要出行方式之一。与此同时,旅客共同出行(以下简称同行)的行为特征也越来越普遍。依据旅客间的同行关系,可以构建同行关系网络;而对该网络中潜在的链接进行预测,将有助于提供个性化的服务和产品。为此,文中提出一种原创的方法,用于在旅客同行关系网络中发现潜在的同行关系。首先对传统的图模式关联规则进行扩展,提出了两类“同行图模式关联规则”,用于预测新的同行关系和未来的同行频次。然后,将上述规则挖掘计算的问题分解为频繁同行模式挖掘、规则生成以及关联分析3个子问题,并设计了有效的分布式和集中式的算法。通过在大规模真实数据集上的测试,证明了所提方法能够高效且准确地预测旅客同行关系网络中潜在的同行关系,且两类规则的预测准确率均高于50%,远高于传统方法(如Jaccard的预测准确率为24%)。 展开更多
关键词 同行预测 同行网络 关联分析 图模式匹配 同行模式
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Comparison of mantle lithosphere beneath early Triassic kimberlite fields in Siberian craton reconstructed from deep-seated xenocrysts 被引量:1
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作者 I.V.Ashchepkov S.S.Kuligin +6 位作者 N.V.Vladykin H.Downes M.A.Vavilov E.N.Nigmatulina S.A.Babushkina N.S.Tychkov O.S.Khmelnikova 《Geoscience Frontiers》 SCIE CAS CSCD 2016年第4期639-662,共24页
Mantle xenocrysts from early Triassic kimberlite pipes from Kharamai, Ary-Mastakh and Kuranakh fields in the Anabar shield of Siberia revealing similar compositional trends were studied to estimate the superplume infl... Mantle xenocrysts from early Triassic kimberlite pipes from Kharamai, Ary-Mastakh and Kuranakh fields in the Anabar shield of Siberia revealing similar compositional trends were studied to estimate the superplume influence on the subcratonic lithosphere mantle (SCLM). Pressure-temperature (PT) reconstructions using monomineral thermobarometry for 5 phases show division of the SCLM beneath the Kharamai field into 6 units: pyroxenitic Fe-rich (1-2 GPa) and Mg-rich (2-3 GPa) layers; middle with two levels of Gar-Sp pyroxenites at - 3 and 4-5 GPa; Gar-dunite-harzburgites - 4.5-6.5 GPa subjected to llm-Px vein metasomatism; and a Mg-rich dunite lower part. In the Anabar shield (Ary-Mastakh, Dyuken and Kuranakh fields) mantle lithosphere is composed of three large units divided into two parts: upper part with amphiboles and phlogopite; two levels of pyroxenites and eclogites at 3 and 4 GPa, and a lower part composed of refertilized dunites. Diagrams showing P-Fe#Gar clusters for garnets and omphacites illustrate the differences between SCLM of these localities. Differences of Triassic SCLM from Devonian SCLM are in simple layering; abundance of Na-Cr-amphiboles and metasomatism in the upper SCLM part, thick pyroxenite-eclogite layer and lower part depletion, heated from SCLM base to 5.0 GPa. Kharamai mantle clinopyroxenes represent three geochemical types: (1) harzburgitic with inclined linear REE, HFSE troughs and elevated Th, U; (2) lherzolitic or pyroxenitic with round TRE patterns and decreasing incompatible elements; (3) eclogitic with Eu troughs, Pb peak and high LILE content. Calculated parental melts for garnets with humped REE patterns suggest dissolution of former Cpx and depression means Cpx and garnets extraction. Clinopyroxenes from Ary-Mastakh fields show less in- dined REE patterns with HMREE troughs and an increase of incompatible elements. Clinopyroxenes from Kuranakh field show flatter spoon-like REE patterns and peaks in Ba, U, Pb and St, similar to those in ophiolitic harzburgites. The PT diagrams for the mantle sections show high temperature gradients in the uppermost SCLM accompanied by an increase of P-Fe#OI upward and slightly reduced thickness of the mantle keel of the Siberian craton, resulting from the influence of the Permian-Triassic superplume, but with no signs of delamination. 展开更多
关键词 Mantle lithosphere Monomineral thermobarometry Mineral geochemistry Triassic kimberlite LAYERING
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Monomineral universal clinopyroxene and garnet barometers for peridotitic,eclogitic and basaltic systems 被引量:2
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作者 I.V.Ashchepkov T.Ntaflos +3 位作者 A.M.Logvinova Z.V.Spetsius H.Downes N.V.Vladykin 《Geoscience Frontiers》 SCIE CAS CSCD 2017年第4期775-795,共21页
New versions of the universal Jd-Di exchange clinopyroxene barometer for peridotites,pyroxenites and eclogites,and also garnet barometer for eclogites and peridotites were developed.They were checked using large exper... New versions of the universal Jd-Di exchange clinopyroxene barometer for peridotites,pyroxenites and eclogites,and also garnet barometer for eclogites and peridotites were developed.They were checked using large experimental data sets for eciogitic(~530) and peridotitic systems(〉650).The precision of the universal Cpx barometer for peridotites based on Jd-Di exchange is close to Cr-Tschermal 展开更多
关键词 Clinopyroxene Barometer Peridotite Eclogite Kimberlite Garnet
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The impact of carbon emission trading policy on firms’green innovation in China 被引量:4
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作者 Hongxin Yu Yaohui Jiang +3 位作者 Zhaowen Zhang Wen-Long Shang Chunjia Han Yuanjun Zhao 《Financial Innovation》 2022年第1期1573-1596,共24页
This study aims to examine the green innovation effect of the carbon emissions pilot policy in China.First,using the difference-in-differences method and regressions of instrumental variables using the data from Chine... This study aims to examine the green innovation effect of the carbon emissions pilot policy in China.First,using the difference-in-differences method and regressions of instrumental variables using the data from Chinese listed firms,we verify that the policy promotes green innovation among regulated firms and is more pronounced among state-owned enterprises,firms in the eastern region,and those with lower financing constraints.Furthermore,this positive effect spreads downstream relative to the regulated firms through input–output linkages,but reduces green innovation to upstream firms.Accordingly,such diffusion of innovation is achieved through the price mechanism.The results necessitate the introduction of various derivatives to mobilize the market to reduce the speculative volatility of carbon prices.In addition,relevant supporting policies must be established to encourage corporate innovation to reduce the crowding-out effect owing to emission reduction and the nonmarket factors. 展开更多
关键词 Carbon emission Carbon finance innovation Green innovation Environmental regulation Differences-in-differences
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Applying Machine Learning Techniques for Religious Extremism Detection on Online User Contents
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作者 Shynar Mussiraliyeva Batyrkhan Omarov +1 位作者 Paul Yoo Milana Bolatbek 《Computers, Materials & Continua》 SCIE EI 2022年第1期915-934,共20页
In this research paper,we propose a corpus for the task of detecting religious extremism in social networks and open sources and compare various machine learning algorithms for the binary classification problem using ... In this research paper,we propose a corpus for the task of detecting religious extremism in social networks and open sources and compare various machine learning algorithms for the binary classification problem using a previously created corpus,thereby checking whether it is possible to detect extremist messages in the Kazakh language.To do this,the authors trained models using six classic machine-learning algorithms such as Support Vector Machine,Decision Tree,Random Forest,K Nearest Neighbors,Naive Bayes,and Logistic Regression.To increase the accuracy of detecting extremist texts,we used various characteristics such as Statistical Features,TF-IDF,POS,LIWC,and applied oversampling and undersampling techniques to handle imbalanced data.As a result,we achieved 98%accuracy in detecting religious extremism in Kazakh texts for the collected dataset.Testing the developed machine learningmodels in various databases that are often found in everyday life“Jokes”,“News”,“Toxic content”,“Spam”,“Advertising”has also shown high rates of extremism detection. 展开更多
关键词 EXTREMISM religious extremism machine learning social media social network natural language processing NLP
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Presence of Acanthamoeba spp.in water purification plants in southern England
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作者 Shanmuganathan V Khan NA 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2009年第6期40-42,共3页
Objective:To identify the prevalence of Acanthamoeba in drinking water treatment plants during the course of the purification processes.Methods:Samples were taken from two drinking water purification plants and monito... Objective:To identify the prevalence of Acanthamoeba in drinking water treatment plants during the course of the purification processes.Methods:Samples were taken from two drinking water purification plants and monitored for the presence of Acanthamoeba in order to estimate the removal capacity of treatment methods employed. Water samples were collected at each step in the purification,during the one year survey,and analysed for the presence of Acanthamoeba spp.by plating on bacterial-seeded plates.Results:The results showed that amoebae were present in surface raw waters in 100%of the samples tested.Acanthamoeba spp.were isolated from 71%and 57%of the water samples collected from post flat-bottom clarifier 1 and post-sedimentation plant respectively.Considering the outflow drinking waters,the removal capacity was 100%in both purification plants monitored.The occurrence of Acanthamoeba was not associated with seasonality.Conclusion: These findings confirm that water purification plants employing methods of flocculation,sedimentation,and filtration in combination with activated charcoal filtration,ozonisation and chlorination exhibited sufficient Acanthamoeba removal capacity and the presence of amoebae in the tap water may be due to older plumbing,water storage tanks,tap water hygiene,and/or environmental settings. 展开更多
关键词 ACANTHAMOEBA DRINKING water PURIFICATION PLANT
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The Sytykanskaya kimberlite pipe:Evidence from deep-seated xenoliths and xenocrysts for the evolution of the mantle beneath Alakit,Yakutia,Russia
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作者 I.V.Ashchepkov A.M.Logvinova +9 位作者 L.F.Reimers T.Ntaflos Z.V.Spetsius N.V.Vladykin H.Downes D.S.Yudin A.V.Travin L.V.Makovchuk V.S.Palesskiy O.S.Khmel'nikova 《Geoscience Frontiers》 SCIE CAS CSCD 2015年第5期687-714,共28页
Mantle xenoliths(>150) and concentrates from late autolithic breccia and porphyritic kimberlite from the Sytykanskaya pipe of the Alakit field(Yakutia) were analyzed by EPMA and LAM ICP methods.In P-TX-f(O2) ... Mantle xenoliths(>150) and concentrates from late autolithic breccia and porphyritic kimberlite from the Sytykanskaya pipe of the Alakit field(Yakutia) were analyzed by EPMA and LAM ICP methods.In P-TX-f(O2) diagrams minerals from xenoliths show widest variations,the trends P-Fe#-CaO,f(O2)for minerals from porphyric kimberlites are more stepped than for xenocrysts from breccia.Ilmenite PTX points mark moving for protokimberlites from the lithosphere base(7.5 GPa) to pyroxenite lens(5-3.5 GPa) accompanied by Cr increase by AFC and creation of two trends P-Fe#OI10-12%and13-15%.The Opx-Gar-based mantle geotherm in Alakit field is close to 35 mW/m2 at 65 GPa and 600 C near Moho was determined.The oxidation state for the megacrystalline ilmenites is lower for the metasomatic associations due to reduction of protokimberlites on peridotites than for uncontaminated varieties at the lithosphere base.Highly inclined linear REE patterns with deep HFSE troughs for the parental melts of clinopyroxene and garnet xenocrysts from breccia were influenced by differentiated protokimberlite.Melts for metasomatic xenoliths reveal less inclined slopes without deep troughs in spider diagrams.Garnets reveal S-shaped REE patterns.The clinopyroxenes from graphite bearing Cr-websterites show inclined and inflected in Gd spectrums with LREE variations due to AFC differentiation.Melts for garnets display less inclined patterns and Ba-Sr troughs but enrichment in Nb-Ta-U.The40Ar/39Ar ages for micas from the Alakit mantle xenoliths for disseminated phlogopites reveal Proterozoic(1154 Ma) age of metasomatism in early Rodinia mantle.Veined glimmerites with richterite- like amphiboles mark1015 Ma plume event in Rodinia mantle.The600-550 Ma stage manifests final Rodinia break-up.The last 385 Ma metasomatism is protokimberlite-related. 展开更多
关键词 KIMBERLITES Mantle lithosphere Mantle xenoliths Th
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罗马-拜占庭钱币的流入与印度次大陆的社会变迁
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作者 汪柏序(译) 徐家玲(译) 《古代文明》 CSSCI 2020年第3期43-50,M0004,共9页
古代及晚期古代,来自地中海世界的罗马-拜占庭钱币大量流入印度次大陆,对该地的社会生活产生了较为深远的影响。通过梳理上述时期印度次大陆的政权格局与流通货币,并对罗马-拜占庭钱币在该地的流通时段、窖藏方式,以及在相应时段所体现... 古代及晚期古代,来自地中海世界的罗马-拜占庭钱币大量流入印度次大陆,对该地的社会生活产生了较为深远的影响。通过梳理上述时期印度次大陆的政权格局与流通货币,并对罗马-拜占庭钱币在该地的流通时段、窖藏方式,以及在相应时段所体现的"货币"和"非货币"作用进行分析,可以发现,同一时期东地中海与西印度洋-波斯湾及阿拉伯海区域的远程贸易网络发生了明显的转变,印度次大陆的政治和经济环境也发生了相应的变迁,而且伴随着上述钱币的流入,在南印度的语境中相关的社会和人际关系也产生了变化。 展开更多
关键词 古代和晚期古代 罗马-拜占庭钱币 东地中海及西印度洋 印度次大陆
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