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Prediction and cause investigation of ozone based on a double-stage attention mechanism recurrent neural network

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Frontiers of Environmental Science & Engineering 2023年第2期17卷 83-95页

作者： yuanxin Zhang Fei Li Chaoqiong Ni Song Gao Shuwei Zhang Jin Xue Zhukai Ning Chuanming Wei Fang Fang Yongyou nie Zheng Jiao School of Environmental and Chemical Engineering Shanghai UniversityShanghai 200444China Shanghai Jinshan Environmental Monitoring Station Shanghai 201500China School of Economics Shanghai UniversityShanghai 200237China

Ozone is becoming a significant air pollutant in some regions,and VOCs are essential for ozone prediction as necessary ozone *** this study,we proposed a recurrent neural network based on a double-stage attention mechanism model to predict ozone,selected an appropriate time series for prediction through the input attention and temporal attention mechanisms,and analyzed the cause of ozone generation according to the contribution of feature *** experimental data show that our model had an RMSE of 7.71μg/m3 and a mean absolute error of 5.97μg/m3 for 1-h *** DA-RNN model predicted ozone closer to observations than the other *** on the importance of the characteristics,we found that the ozone pollution in the Jinshan Industrial Zone mainly comes from the emissions of petrochemical enterprises,and the good generalization performance of the model is proved through testing multiple *** experimental results demonstrate the validity and promising application of the DA-RNN model in predicting atmospheric pollutants and investigating their causes.

关键词： Ozone prediction Deep learning Time series Attention Volatile organic compounds

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一种采用坐标交织空时编码的空间调制方案

计算机工程与应用 2012年第20期48卷 103-107页

作者：聂仲尔王安国曲倩倩徐元欣天津大学电子信息工程学院天津300072

基于坐标交织正交设计(CIOD)的空时编码,提出了一种新型的4发射天线空间调制(SM)方案。与传统的空间调制技术相比,该方案不仅利用天线序号携带信息,提高了无线通信系统的频带利用率,而且通过空时编码可获得较大的分集增益。接收端采用... 详细信息

基于坐标交织正交设计(CIOD)的空时编码,提出了一种新型的4发射天线空间调制(SM)方案。与传统的空间调制技术相比,该方案不仅利用天线序号携带信息,提高了无线通信系统的频带利用率,而且通过空时编码可获得较大的分集增益。接收端采用条件最大似然(ML)算法,大大降低了译码复杂度。在独立和相关信道情况下对所提方案、传统空间调制及空时分组码(STBC)的误比特(BER)性能进行了仿真,结果表明,所提方案的性能优于传统的空时分组码和空间调制。

关键词：坐标交织正交设计空时编码空间调制条件最大似然算法

GC-MS比较两种提取方法石榴籽油的化学成分

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中国现代中药 2009年第12期11卷 18-20页

作者：聂阳熊红仔甘柯林刘燕李苑新肇庆医学高等专科学校药剂教研室广东肇庆526020 广州美晨药业有限公司广东广州510075 广东药学院中药开发研究所广东广州510006

目的:比较两种提取方法所得石榴籽油的化学成分。方法:采用索氏提取法(SE)和超临界CO_2萃取法(SFE)提取石榴籽油,以GC-MS法分析两种方法提取的油成分。结果:SE法提取的石榴籽油中鉴定出8种成分,占总峰面积的71.50%;SFE法提取的石榴籽油... 详细信息

目的:比较两种提取方法所得石榴籽油的化学成分。方法:采用索氏提取法(SE)和超临界CO_2萃取法(SFE)提取石榴籽油,以GC-MS法分析两种方法提取的油成分。结果:SE法提取的石榴籽油中鉴定出8种成分,占总峰面积的71.50%;SFE法提取的石榴籽油中鉴定出11种成分,占总峰面积的84.30%。结论:两种方法提取的石榴籽油主要成分为脂肪酸,但组成和含量差异明显。超临界CO_2萃取法提取时间短、油得率高、药效成分提取率高。

关键词：石榴籽油索氏提取法超临界萃取CO2法 GC—MS

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中国省域能源消费强度测度研究

科技创业月刊 2024年第4期37卷 10-16页

作者：马渊新赵玉婷陶鹤关欣悦郑霞聂玉燕兰州工商学院经济学院甘肃兰州730101

能源消费强度一直是中国经济发展中的一个重要问题,随着中国经济的快速发展,能源需求不断增加,能源消费强度一直处于高位。以中国内地30个省(市)为研究对象,采用多维度指标,如国内生产总值、第二、三产业增加值占GDP的比重、年末常住人... 详细信息

能源消费强度一直是中国经济发展中的一个重要问题,随着中国经济的快速发展,能源需求不断增加,能源消费强度一直处于高位。以中国内地30个省(市)为研究对象,采用多维度指标,如国内生产总值、第二、三产业增加值占GDP的比重、年末常住人口、外商投资企业投资总额、规模以上工业企业R&D经费、煤炭消费量占能源消费总量比重和电力消费量占能源消费总量比重,构建评价能源消费强度的指标体系。其次,采用熵值法、主成分分析和因子分析三种方法进行综合评价,定量分析各影响因素的作用,比较分析不同行业能源消费强度变动的差异性,有针对性的降低我国能源消费强度。最后,从产业结构升级、改变经济增长方式等角度,对制造业能源强度变化进行分析,提出相关对策建议,为政策的制定提供参考。

关键词：能源消费强度熵值法主成分分析因子分析综合评价

同方期刊数据库博看期刊评论

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Biomarkers of aging

Science China(Life Sciences) 2023年第5期66卷 893-1066页

作者： Aging Biomarker Consortium Hainan Bao Jiani Cao Mengting Chen Min Chen Wei Chen Xiao Chen Yanhao Chen Yu Chen Yutian Chen Zhiyang Chen Jagadish K Chhetri Yingjie Ding Junlin Feng Jun Guo Mengmeng Guo Chuting He Yujuan Jia Haiping Jiang Ying Jing Dingfeng Li Jiaming Li Jingyi Li Qinhao Liang Rui Liang Feng Liu Xiaoqian Liu Zuojun Liu Oscar Junhong Luo Jianwei Lv Jingyi Ma Kehang Mao Jiawei nie Xinhua Qiao Xinpei Sun Xiaoqiang Tang Jianfang Wang Qiaoran Wang Siyuan Wang Xuan Wang Yaning Wang Yuhan Wang Rimo Wu Kai Xia Fu-Hui Xiao Lingyan Xu Yingying Xu Haoteng Yan Liang Yang Ruici Yang yuanxin Yang Yilin Ying Le Zhang Weiwei Zhang Wenwan Zhang Xing Zhang Zhuo Zhang Min Zhou Rui Zhou Qingchen Zhu Zhengmao Zhu Feng Cao Zhongwei Cao Piu Chan Chang Chen Guobing Chen Hou-Zao Chen Jun Chen Weimin Ci Bi-Sen Ding Qiurong Ding Feng Gao Jing-Dong JHan Kai Huang Zhenyu Ju Qing-Peng Kong Ji Li Jian Li Xin Li Baohua Liu Feng Liu Lin Liu Qiang Liu Qiang Liu Xingguo Liu Yong Liu Xianghang Luo Shuai Ma Xinran Ma Zhiyong Mao Jing nie Yaojin Peng Jing Qu Jie Ren Ruibao Ren Moshi Song Zhou Songyang Yi Eve Sun Yu Sun Mei Tian Shusen Wang Si Wang Xia Wang Xiaoning Wang Yan-Jiang Wang Yunfang Wang Catherine CL Wong Andy Peng Xiang Yichuan Xiao Zhengwei Xie Daichao Xu Jing Ye Rui Yue Cuntai Zhang Hongbo Zhang Liang Zhang Weiqi Zhang Yong Zhang Yun-Wu Zhang Zhuohua Zhang Tongbiao Zhao Yuzheng Zhao Dahai Zhu Weiguo Zou Gang Pei Guang-Hui Liu Aging Biomarker Consortium(ABC) Beijing 100101China CAS Key Laboratory of Genomic and Precision Medicine Beijing Institute of GenomicsChinese Academy of Sciences and China National Center for BioinformationBeijing 100101China State Key Laboratory of Stem Cell and Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China Department of Dermatology Xiangya HospitalCentral South UniversityChangsha 410008China Hunan Key Laboratory of Aging Biology Xiangya HospitalCentral South UniversityChangsha 410008China National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangsha 410008China Clinic Center of Human Gene Research Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Hubei Clinical Research Center of Metabolic and Cardiovascular Disease Huazhong University of Science and TechnologyWuhan 430022China Hubei Key Laboratory of Metabolic Abnormalities and Vascular Aging Huazhong University of Science and TechnologyWuhan 430022China Stem Cell Translational Research Center Tongji HospitalTongji University School of MedicineShanghai 200065China Department of Nuclear Medicine Daping HospitalThird Military Medical UniversityChongqing 400042China CAS Key Laboratory of Nutrition Metabolism and Food SafetyShanghai Institute of Nutrition and HealthUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200031China Shanghai Key Laboratory of Maternal Fetal Medicine Clinical and Translational Research Center of Shanghai First Maternity and Infant HospitalFrontier Science Center for Stem Cell ResearchShanghai Key Laboratory of Signaling and Disease ResearchSchool of Life Sciences and TechnologyTongji UniversityShanghai 200092China The Department of Endovascular Surgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China Key Laboratory of Regenerative Medicine of Ministry of Education Institute of Ageing and Regenerative MedicineJ

Aging biomarkers are a combination of biological parameters to(i)assess age-related changes,(ii)track the physiological aging process,and(iii)predict the transition into a pathological *** a broad spectrum of aging biomarkers has been developed,their potential uses and limitations remain poorly *** immediate goal of biomarkers is to help us answer the following three fundamental questions in aging research:How old are we?Why do we get old?And how can we age slower?This review aims to address this ***,we summarize our current knowledge of biomarkers developed for cellular,organ,and organismal levels of aging,comprising six pillars:physiological characteristics,medical imaging,histological features,cellular alterations,molecular changes,and secretory *** fulfill all these requisites,we propose that aging biomarkers should qualify for being specific,systemic,and clinically relevant.

关键词： aging senescence biomarker clock

铝电解用预焙阳极煅后石油焦真密度测定精度的影响因素分析

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云南冶金 2023年第6期52卷 122-126页

作者：聂绍红徐端端田素兰陈祥杨龙云南源鑫炭素有限公司云南建水654308

考察了煮沸时间、恒温水浴温度对铝电解用预焙阳极用煅后石油焦真密度分析精度的影响,通过试验确定煮沸时间和恒温水浴的温度,得到结果:煮沸时间为3 min,水浴温度为19.5~20.5℃。

关键词：铝电解用预焙阳极煅后焦真密度煮沸时间恒温水浴