Using the reported new U-Pb age with the Sensitive High-Resolution Ion Microprobe （SHRIMP Ⅱ）, zircon U-Pb ages were obtained from two samples of K-feldspar felsic paragneiss and K-feldspar gneissoid trondhjemite on...Using the reported new U-Pb age with the Sensitive High-Resolution Ion Microprobe （SHRIMP Ⅱ）, zircon U-Pb ages were obtained from two samples of K-feldspar felsic paragneiss and K-feldspar gneissoid trondhjemite on the southern margin of the Taihang Mountains in the North China Craton. The protolith of the K-feldspar felsic paragneiss is argillaceous-sandy clastic sedimentary rock, probably deposited in the Neoarchean. Most of the detritus zircons show heavy loss of Pb. Five spots of zircons near the upper point, yield a weighted mean ^207Pb/^206Pb age of 3399±8 Ma, representing an age of the sedimentary source. Two groups of zircons from the K-feldspar gneissoid trondhjemite give weighted mean ^207Pb/^206Pb ages of 2511±13 Ma and 2735±16 Ma respectively. The former represents the emplacement time of the pluton, while the latter is interpreted as the age of the inherited zircons. The new data support that the Archean geological body in the central zone has an affinity with those from the eastern block of the North China Craton.展开更多
Residents’payment is an important supplement to the government’s urban haze control costs.In this paper,Zhengzhou City and Jiaozuo City of Henan Province were taken as research objects.Through research methods such ...Residents’payment is an important supplement to the government’s urban haze control costs.In this paper,Zhengzhou City and Jiaozuo City of Henan Province were taken as research objects.Through research methods such as data mining,questionnaire survey and model construction,the residents’cognition on haze control,willingness to pay and its influencing factors were deeply studied.Main research results were as below:residents in Zhengzhou and Jiaozuo have improved their awareness and satisfaction with haze control,but the growth rate was slow.In 2014,2018 and 2021,the expected values of willingness to pay for haze control in Zhengzhou were 79.94,85.52 and 47.20 yuan/month respectively,while they were 62.17,57.77 and 46.96 yuan/month in Jiaozuo City.Residents’haze awareness had the most significant effect on the willingness to pay for haze control,and there was positive correlation(P<0.05).Residents’cognition of haze control was the most important factor affecting their willingness to pay for haze control.Residents’income level and air pollution level had a positive effect on residents’willingness to pay,while residents’confidence in the government had a weak impact on their willingness to pay.展开更多
In recent years,many cities have taken measures to reduce volatile organic compounds(VOCs),an important precursor of ozone(O_(3)),to alleviate O_(3) pollution in China.116 VOC species were measured by online and offli...In recent years,many cities have taken measures to reduce volatile organic compounds(VOCs),an important precursor of ozone(O_(3)),to alleviate O_(3) pollution in China.116 VOC species were measured by online and offline methods in the urban area of Jiaozuo from May to October in 2021 to analyze the compositional characteristics.VOC sources were analyzed by a positive matrix factorization(PMF)model,and the sensitivity of ozone generation was determined by ozone isopleth plotting research(OZIPR)simulation.The results showed that the average volume concentration of total VOCs was 30.54 ppbv and showed a bimodal feature due to the rush-hour traffic in the morning and at nightfall.The most dominant VOC groups were oxygenated VOCs(OVOCs,29.3%)and alkanes(26.7%),and the most abundant VOC species were acetone and acetylene.However,based on the maximum incremental reactivity(MIR)method,the major VOC groups in terms of ozone formation potential(OFP)contribution were OVOCs(68.09μg/m^(3),31.5%),aromatics(62.90μg/m^(3),29.1%)and alkene/alkynes(54.90μg/m^(3),25.4%).This indicates that the control of OVOCs,aromatics and alkene/alkynes should take priority.Five sources of VOCs were quantified by PMF,including fixed sources of fossil fuel combustion(27.8%),industrial processes(25.9%),vehicle exhaust(19.7%),natural and secondary formation(13.9%)and solvent usage(12.7%).The empirical kinetic modeling approach(EKMA)curve obtained by OZIPR on O_(3) exceedance days indicated that the O_(3) sensitivity varied in different months.The results provide theoretical support for O_(3) pollution prevention and control in Jiaozuo.展开更多
目的生成式和传统人工智能模型是信息时代的关键工具。在这些技术的助力下,眼动过程的样本生成与识别显得尤为关键,它已成为深入研究认知机制的重要手段。为了推动生成式人工智能在眼动技术领域的应用发展,解决眼动样本生成及因网络深...目的生成式和传统人工智能模型是信息时代的关键工具。在这些技术的助力下,眼动过程的样本生成与识别显得尤为关键,它已成为深入研究认知机制的重要手段。为了推动生成式人工智能在眼动技术领域的应用发展,解决眼动样本生成及因网络深度增加而导致的不透明性和不可解释性问题,并深入挖掘与幼儿语言发展相关的眼动数据,方法采集4~6岁幼儿理解不同焦点结构的眼动数据,采用生成式人工智能模型-变分自编码器(variational autoencoder,VAE)和传统模型-多层感知器(multi-layer perceptron,MLP)识别眼动模式的发展差异并尝试生成新样本,基于灰色关联分析和混淆矩阵对生成式数据集进行解释。结果结果表明:(1)VAE生成的4岁组、5岁组和6岁组幼儿眼动数据集精度高于MINIST数据集(mixed National Institute of Standards and Technology database),且与MLP分析结果一致,具有准确性、多样性和一定的可解释性;(2)生成式眼动数据及混淆矩阵结果表明,在无焦点结构句式中,幼儿在4~5岁、5~6岁两个阶段理解水平均有提升,而宾语焦点结构和主语焦点结构的眼动特征在4~5岁变化较小,5~6岁变化较大,说明幼儿对焦点结构的理解在5岁是一个关键期,这符合幼儿焦点结构理解发展规律。结论提出的人工智能耦合分析方法,具备有效识别眼动特征发展模式的能力,并能据此生成可靠的新样本。这一方法不仅为生成式人工智能与眼动技术的融合开辟了新的途径,而且为复杂语言理解问题提供了全新的思考方向。展开更多
文摘Using the reported new U-Pb age with the Sensitive High-Resolution Ion Microprobe （SHRIMP Ⅱ）, zircon U-Pb ages were obtained from two samples of K-feldspar felsic paragneiss and K-feldspar gneissoid trondhjemite on the southern margin of the Taihang Mountains in the North China Craton. The protolith of the K-feldspar felsic paragneiss is argillaceous-sandy clastic sedimentary rock, probably deposited in the Neoarchean. Most of the detritus zircons show heavy loss of Pb. Five spots of zircons near the upper point, yield a weighted mean ^207Pb/^206Pb age of 3399±8 Ma, representing an age of the sedimentary source. Two groups of zircons from the K-feldspar gneissoid trondhjemite give weighted mean ^207Pb/^206Pb ages of 2511±13 Ma and 2735±16 Ma respectively. The former represents the emplacement time of the pluton, while the latter is interpreted as the age of the inherited zircons. The new data support that the Archean geological body in the central zone has an affinity with those from the eastern block of the North China Craton.
基金Supported by Humanities and Social Sciences Project of the Ministry of Education(21YJCZH016)。
文摘Residents’payment is an important supplement to the government’s urban haze control costs.In this paper,Zhengzhou City and Jiaozuo City of Henan Province were taken as research objects.Through research methods such as data mining,questionnaire survey and model construction,the residents’cognition on haze control,willingness to pay and its influencing factors were deeply studied.Main research results were as below:residents in Zhengzhou and Jiaozuo have improved their awareness and satisfaction with haze control,but the growth rate was slow.In 2014,2018 and 2021,the expected values of willingness to pay for haze control in Zhengzhou were 79.94,85.52 and 47.20 yuan/month respectively,while they were 62.17,57.77 and 46.96 yuan/month in Jiaozuo City.Residents’haze awareness had the most significant effect on the willingness to pay for haze control,and there was positive correlation(P<0.05).Residents’cognition of haze control was the most important factor affecting their willingness to pay for haze control.Residents’income level and air pollution level had a positive effect on residents’willingness to pay,while residents’confidence in the government had a weak impact on their willingness to pay.
基金supported by the Research Project Entrusted by Henan Ecological Environment Monitoring and Safety Center,China(No.20201557)the Study of Collaborative Prevention and Control of Fine Particulate Matter and Ozone Pollution of Jiaozuo(No.DQGG202134)。
文摘In recent years,many cities have taken measures to reduce volatile organic compounds(VOCs),an important precursor of ozone(O_(3)),to alleviate O_(3) pollution in China.116 VOC species were measured by online and offline methods in the urban area of Jiaozuo from May to October in 2021 to analyze the compositional characteristics.VOC sources were analyzed by a positive matrix factorization(PMF)model,and the sensitivity of ozone generation was determined by ozone isopleth plotting research(OZIPR)simulation.The results showed that the average volume concentration of total VOCs was 30.54 ppbv and showed a bimodal feature due to the rush-hour traffic in the morning and at nightfall.The most dominant VOC groups were oxygenated VOCs(OVOCs,29.3%)and alkanes(26.7%),and the most abundant VOC species were acetone and acetylene.However,based on the maximum incremental reactivity(MIR)method,the major VOC groups in terms of ozone formation potential(OFP)contribution were OVOCs(68.09μg/m^(3),31.5%),aromatics(62.90μg/m^(3),29.1%)and alkene/alkynes(54.90μg/m^(3),25.4%).This indicates that the control of OVOCs,aromatics and alkene/alkynes should take priority.Five sources of VOCs were quantified by PMF,including fixed sources of fossil fuel combustion(27.8%),industrial processes(25.9%),vehicle exhaust(19.7%),natural and secondary formation(13.9%)and solvent usage(12.7%).The empirical kinetic modeling approach(EKMA)curve obtained by OZIPR on O_(3) exceedance days indicated that the O_(3) sensitivity varied in different months.The results provide theoretical support for O_(3) pollution prevention and control in Jiaozuo.
文摘目的生成式和传统人工智能模型是信息时代的关键工具。在这些技术的助力下,眼动过程的样本生成与识别显得尤为关键,它已成为深入研究认知机制的重要手段。为了推动生成式人工智能在眼动技术领域的应用发展,解决眼动样本生成及因网络深度增加而导致的不透明性和不可解释性问题,并深入挖掘与幼儿语言发展相关的眼动数据,方法采集4~6岁幼儿理解不同焦点结构的眼动数据,采用生成式人工智能模型-变分自编码器(variational autoencoder,VAE)和传统模型-多层感知器(multi-layer perceptron,MLP)识别眼动模式的发展差异并尝试生成新样本,基于灰色关联分析和混淆矩阵对生成式数据集进行解释。结果结果表明:(1)VAE生成的4岁组、5岁组和6岁组幼儿眼动数据集精度高于MINIST数据集(mixed National Institute of Standards and Technology database),且与MLP分析结果一致,具有准确性、多样性和一定的可解释性;(2)生成式眼动数据及混淆矩阵结果表明,在无焦点结构句式中,幼儿在4~5岁、5~6岁两个阶段理解水平均有提升,而宾语焦点结构和主语焦点结构的眼动特征在4~5岁变化较小,5~6岁变化较大,说明幼儿对焦点结构的理解在5岁是一个关键期,这符合幼儿焦点结构理解发展规律。结论提出的人工智能耦合分析方法,具备有效识别眼动特征发展模式的能力,并能据此生成可靠的新样本。这一方法不仅为生成式人工智能与眼动技术的融合开辟了新的途径,而且为复杂语言理解问题提供了全新的思考方向。
