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Time-sensitive prediction of NO_(2) concentration in China using an ensemble machine learning model from multi-source data

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Journal of Environmental Sciences 2024年第3期137卷 30-40页

作者： Chenliang Tao Man jia Guoqiang wang Yuqiang Zhang Qingzhu Zhang xianfeng wang Qiao wang Wenxing wang Big Data Research Center for Ecology and Environment Environment Research InstituteShandong UniversityQingdao 266237China Shandong Provincial Eco-environment Monitoring Center Jinan 250101China

Nitrogen dioxide(NO_(2))poses a critical potential risk to environmental quality and public health.A reliable machine learning(ML)forecasting framework will be useful to provide valuable information to support government *** on the data from1609 air quality monitors across China from 2014-2020,this study designed an ensemble ML model by integrating multiple types of spatial-temporal variables and three sub-models for time-sensitive prediction over a wide *** ensemble ML model incorporates a residual connection to the gated recurrent unit(GRU)network and adopts the advantage of Transformer,extreme gradient boosting(XGBoost)and GRU with residual connection network,resulting in a 4.1%±1.0%lower root mean square error over XGBoost for the test *** ensemble model shows great prediction performance,with coefficient of determination of 0.91,0.86,and 0.77 for 1-hr,3-hr,and 24-hr averages for the test results,*** particular,this model has achieved excellent performance with low spatial uncertainty in Central,East,and North China,the major site-dense *** the interpretability analysis based on the Shapley value for different temporal resolutions,we found that the contribution of atmospheric chemical processes is more important for hourly predictions compared with the daily scale predictions,while the impact of meteorological conditions would be ever-prominent for the *** with existing models for different spatiotemporal scales,the present model can be implemented at any air quality monitoring station across China to facilitate achieving rapid and dependable forecast of NO_(2),which will help developing effective control policies.

关键词： Air quality prediction Deep learning Ensemble method Nitrogen dioxide Spatiotemporal covariates

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Predication of Selective Ring-opening Hydrogenolysis for Furfuryl Alcohol to Produce Pentanediol over Dual-atom Catalysts

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Chemical Research in Chinese Universities 2024年第1期40卷 55-63页

作者： wang Tingting wang jia XI Yongjie HU Bin LI Fuwei State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China

Selective activation of C-O bond is of fundamental importance in the precise conversion of oxygenates into value-added compounds in an atom-economic and sustainable manner, and meanwhile, the structurally well-defined dual-atoms catalysts (DACs) have been scarcely investigated in this field. In this study, a series of transition metal DACs anchored on nitrogen-doped graphene (TM2/NC, TM=Pt, Ir, Rh, Pd, Ru, Co, Ni and Cu) was constructed to make a comprehensive investigation of their selectivity in the hydrogenative transformation of furfuryl alcohol (FAL), an important biomass platform molecule, to 1,2-pentanediol (1,2-PeD) via selective cleavage of furanic C5-O bond, by density functional theory (DFT) calculations and microkinetic modeling. We found that Ir2/NC demonstrated a high selectivity for the cleavage of furanic C5-O bond to produce 1,2-PeD, while the production of THFAL or 1,5-pentanediol (1,5-PeD) on other TM2/NC catalysts are more favorable. Furthermore, we found that the selective C-O bond cleavage of FAL furan ring is affected by the orbital overlap between the d-orbitals of the anchored metal atoms and the p-orbitals of the adsorbed C atom in FAL, suggesting that the selectivity of the C-O bond cleavage is inextricably related with the electronic property of the anchored metals.

关键词： Furfuryl alcohol Hydrogenation Dual-atom catalyst Density functional theory(DFT)calculation

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破解优质农副土特产品产销对接难题——以河南省为例

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广东农业科学 2012年第3期39卷 222-225页

作者：王家显河南工程学院经济贸易系河南新郑451191

流通费用高企、产销脱节、品牌意识不强以及外销滞后等问题严重影响河南省优质农副土特产品的产销对接。为顺利实现产销对接,河南省各级政府应加强政策引导、加大财政投入,加快专业信息平台以及农村专业合作社建设;相关企业应开展差异... 详细信息

流通费用高企、产销脱节、品牌意识不强以及外销滞后等问题严重影响河南省优质农副土特产品的产销对接。为顺利实现产销对接,河南省各级政府应加强政策引导、加大财政投入,加快专业信息平台以及农村专业合作社建设;相关企业应开展差异化经营,树立名牌意识,积极开拓各种销售渠道;消费者应树立健康消费观念。

关键词：农副土特产品产销脱节品牌化渠道创新

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Myotis bat STING attenuates aging-related inflammation in female mice

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Zoological Research 2024年第5期45卷 961-971页

作者： Xi wang Jing-Kun jia Qi wang Jing-Wen Gong Ang Li jia Su Peng Zhou Wuhan Institute of Virology Chinese Academy of SciencesWuhanHubei 430071China Guangzhou National Laboratory Guangzhou International Bio IslandGuangzhouGuangdong 510005China University of Chinese Academy of Sciences Beijing 100000China State Key Laboratory of Respiratory Disease First Affiliated Hospital of Guangzhou Medical SchoolGuangzhouGuangdong 510005China

Bats,notable as the only flying mammals,serve as natural reservoir hosts for various highly pathogenic viruses in humans(e.g.,SARS-CoV and Ebola virus).Furthermore,bats exhibit an unparalleled longevity among mammals relative to their size,particularly the Myotis bats,which can live up to 40 ***,the mechanisms underlying these distinctive traits remain incompletely *** our prior research,we demonstrated that bats exhibit dampened STING-interferon activation,potentially conferring upon them the capacity to mitigate virus-or aging-induced *** substantiate this hypothesis,we established the first in vivo bat-mouse model for aging studies by integrating Myotis davidii bat STING(MdSTING)into the mouse *** monitored the genotypes of these mice and performed a longitudinal comparative transcriptomic analysis on MdSTING and wild-type mice over a 3-year aging *** transcriptomic analysis indicated a reduction in aging-related inflammation in female MdSTING mice,as evidenced by significantly lower levels of pro-inflammatory cytokines and chemokines,immunopathology,and neutrophil recruitment in aged female MdSTING mice compared to aged wild-type mice in *** results indicated that MdSTING knock-in attenuates the aging-related inflammatory response and may also improve the healthspan in mice in a sex-dependent *** the underlying mechanism awaits further study,this research has critical implications for bat longevity research,potentially contributing to our comprehension of healthy aging in humans.

关键词： Bat STING Longevity Aging-related inflammation Virus reservoir host

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非对称供应成本信息下装配系统定价与供货策略研究

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系统工程理论与实践 2015年第7期35卷 1689-1697页

作者：王先甲肖露关旭钱桂生武汉大学经济与管理学院武汉430072 武汉大学系统工程研究所武汉430072 香港城市大学系统工程与工程管理系香港999077

本文考虑一个单制造商和两个互补性供应商所构成的装配系统,当市场需求随机时,制造商采取供应商管理库存的方式来转移零部件的库存风险并决定零部件的批发价格,两供应商需要在市场需求真正到来之前自行决定各自的零部件生产量,并承担相... 详细信息

本文考虑一个单制造商和两个互补性供应商所构成的装配系统,当市场需求随机时,制造商采取供应商管理库存的方式来转移零部件的库存风险并决定零部件的批发价格,两供应商需要在市场需求真正到来之前自行决定各自的零部件生产量,并承担相应的库存风险.本文假定供应商存在高成本和低成本两个类型,利用斯坦伯格博弈和纳什均衡研究了当供应商生产成本信息不对称和对称这两种状态下的生产与定价决策,分析供应商成本信息共享的价值.研究表明,高成本供应商在信息对称时的均衡收益大于信息不对称时的均衡收益,愿意共享信息,而低成本供应商在信息不对称时的均衡收益更大,并不会自愿共享成本信息;供应商成本信息共享对制造商和供应链也是有利的.

关键词：信息不对称装配系统博弈论价值分析

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随机等价互补品序贯组合拍卖数量折扣研究

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系统工程理论与实践 2014年第5期34卷 1196-1201页

作者：王先甲杨森张柳波武汉大学经济管理学院武汉430072 河南财经政法大学数学与信息科学学院郑州450002

将数量折扣引入到具有随机等价互补品的序贯二价拍卖中,研究了数量折扣对买者均衡报价战略及期望剩余的影响,建立了卖者如何选择最优的数量折扣以最大化自己期望收益的规划问题.分析结果表明:采用适量的数量折扣可以激发买者之间的激烈... 详细信息

将数量折扣引入到具有随机等价互补品的序贯二价拍卖中,研究了数量折扣对买者均衡报价战略及期望剩余的影响,建立了卖者如何选择最优的数量折扣以最大化自己期望收益的规划问题.分析结果表明:采用适量的数量折扣可以激发买者之间的激烈竞争行为,进而使得卖者的期望收益得到提高,而最优的数量折扣随着买者人数的增加而减小.

关键词：序贯拍卖数量折扣机制设计二层规划

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Study on surface discharge of nonlinear conductive epoxy resin/SrTiO3 composites in 80–300 K temperature zone

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High Voltage 2024年第1期9卷 117-126页

作者： Yunqi Xing Bin wang Mingyang wang jiakai Chi Peng jia Rongjin Huang State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of TechnologyTianjinChina Key Laboratory of Electormagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of TechnologyTianjinChina Key Laboratory of Special Machine and High Voltage Apparatus(Ministry of Education) Shenyang University of TechnologyShenyangChina State Grid Tianjin High Voltage Company TianjinChina China Energy Engineering Group Tianjin Electric Power Design Institute Co. Ltd.TianjinChina CAS Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryBeijingChina

Bisphenol F epoxy resin(EP)is often used in terminal current lead insulation of superconducting equipment because of its good insulation performance,high mechanical strength,good toughness at cryogenic temperatures,and resistance to cold shock and heat ***,due to the wide temperature range of 80–300 K and the strong electric field,the EP-N_(2)interface is prone to surface flashover,resulting in terminal insulation *** improve the reliability of the current lead insulation,non-linear conductive EP/strontium titanate(SrTiO_(3))composites were prepared by modification with nano *** changes of dielectric,surface discharge,flashover,and trap distribution characteristics of composite materials were studied,and the mechanism of SrTiO_(3)on the surface flashover of composite materials was *** results show that the conductivity of the composite increases with the rise of SrTiO_(3)filling content,and the amplitude of improvement is greater under the strong electric field,showing a more significant *** composite has a lower trap energy level and a greater number of shallow traps compared to pure EP,which accelerates surface charge detrapping and reduces charge accumulation,effectively enhancing the discharge and surface flashover voltage of the composite.

关键词： composites composite insulation

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Sedimentary architecture of submarine channel-lobe systems under different seafloor topography:Insights from the Rovuma Basin offshore East Africa

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Petroleum Science 2024年第1期21卷 125-142页

作者： Mei Chen Sheng-He Wu Rui-Feng wang jia-jia Zhang Peng-Fei Xie Min wang Xiao-Feng wang Ji-Tao Yu Qi-Cong Xiong State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China Faculty of Geosciences University of BremenBremen28359Germany MARUM-Center for Marine and Environmental Sciences University of BremenBremen28359Germany Research institute of Petroleum Exploration and Development PetroChinaBeijing10083China School of Geosciences Yangtze UniversityWuhan 100083HubeiChina CNODC Mozambique Ltd. Beijing 100034China

Seafloor topography plays an important role in the evolution of submarine ***,it is still not so clear how the shape of slope affects the three-dimensional(3-D)architecture of submarine *** this study,we analyze the effect of topography factors on different hierarchical lobe architectures that formed during Pliocene to Quaternary in the Rovuma Basin offshore East *** characterize the shape,size and growth pattern of different hierarchical lobe architectures using 3-D seismic *** find that the relief of the topographic slope determines the location of preferential deposition of lobe complexes and single *** the topography is irregular and presents topographic lows,lobe complexes first infill these *** lobes are deposited preferentially at positions with higher longitudinal(***-slope)slope *** the longitudinal slope becomes higher,the aspect ratio of the single lobes ***(***-slope)topography does not seem to have a strong influence on the shape of single lobe,but it seems to affect the overlap of single *** the lateral slope gradient is relatively high,the single lobes tend to have a larger overlap ***,as the average of lateral slope and longitudinal slope gets greater,the width/thickness ratio of the single lobe is smaller,*** tend to accumulate *** results demonstrate that the shape of slopes more comprehensively influences the 3-D architecture of lobes in natural deep-sea systems than previously other lobe deposits and analogue experiments,which helps us better understand the development and evolution of the distal parts of turbidite systems.

关键词： Submarine fan Seafloor topography Sedimentary architecture Slope system SW Indian ocean

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基于PSO神经网络的进化博弈研究

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系统工程与电子技术 2007年第8期29卷 1282-1284页

作者：刘伟兵王先甲武汉大学系统工程研究所湖北武汉430072

针对进化博弈中博弈人是有限理性的,提出了一种基于粒子群神经网络的进化博弈决策机制。该机制将神经网络技术引入到进化博弈中,并采用粒子群优化算法(PSO算法)来训练神经网络,因而可利用神经网络来模拟博弈人在进化过程中的学习和策略... 详细信息

针对进化博弈中博弈人是有限理性的,提出了一种基于粒子群神经网络的进化博弈决策机制。该机制将神经网络技术引入到进化博弈中,并采用粒子群优化算法(PSO算法)来训练神经网络,因而可利用神经网络来模拟博弈人在进化过程中的学习和策略调整。利用该机制分别对有限理性条件下的鹰-鸽博弈和重复囚徒困境博弈进行了研究。实验表明:PSO神经网络可以准确地模拟进化博弈中博弈人的动态学习与决策过程,能有效地指导博弈人的策略选取,是进化博弈分析的有力工具。

关键词：博弈论进化博弈神经网络粒子群优化算法

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电力市场下发电公司和大用户间电力交易的双方叫价拍卖模型

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电网技术 2005年第6期29卷 32-36页

作者：方德斌王先甲武汉大学商学院管理科学与工程系湖北省武汉市430072 武汉大学系统工程研究所湖北省武汉市430072

随着我国电力体制的改革和发电侧竞争市场的建立,在需求方很快也会引入竞争,并建立完全开放的双边电力市场。在完全开放的双边电力市场下,大用户直接购电问题已成为我国电力改革的重大课题。研究发电公司和大用户如何建立有效的报价策... 详细信息

随着我国电力体制的改革和发电侧竞争市场的建立,在需求方很快也会引入竞争,并建立完全开放的双边电力市场。在完全开放的双边电力市场下,大用户直接购电问题已成为我国电力改革的重大课题。研究发电公司和大用户如何建立有效的报价策略具有十分重要的理论和实践价值。作者提出一种直接交易方式,由大用户直接与发电企业进行一对一的交易,并自定价格。因而,这是发电公司和大用户的双方叫价拍卖问题,通过对双方叫价拍卖的交易规则进行描述。针对发电公司的生产成本和大用户的估价是私有信息的情况,建立了完全开放市场下发电公司和大用户的双方叫价拍卖的不完全信息贝叶斯博弈模型,并求解贝叶斯纳什均衡,给出了发电公司和大用户的均衡报价策略。

关键词：发电公司拍卖电力市场大用户电力交易完全开放报价策略直接均衡描述

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