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Accurate prediction of air quality response to emissions for effective control policy design

Journal of Environmental Sciences 2023年第1期123卷 116-126页

作者： min cao jia Xing Shovan Kumar Sahu Lei Duan Junhua Li State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China

Designing effective control policy requires accurate quantification of the relationship between the ambient concentrations of O3and PM2.5and the emissions of their ***,the challenge is that precursor reduction does not necessarily lead to decreases in the concentrations of O3and PM2.5,which are formed by multiple precursors under complex physical and chemical processes;this calls for the development of advanced model technologies to provide accurate predictions of the nonlinear responses of air quality to *** from the traditional sensitivity analysis and source apportionment methods,the reduced form models(RFMs)based on chemical transport models(CTMs)are able to quantify air quality responses to emissions more accurately and efficiently with lower computational *** we review recent approaches used in RFMs and compare their structures,advantages and disadvantages,performance and *** general,RFMs are classified into three types including(1)sensitivity-based models,(2)models with simplified chemistry and physical processes,and(3)statistical models,with considerable differences in principles,characteristics and application *** prediction of nonlinear responses by RFMs enables more in-depth analysis,not only in terms of real-time prediction of concentrations and quantification of human exposure,health impacts and economic damage,but also in optimizing control ***,data assimilation and emission inventory inversion based on the nonlinear response of concentrations to emissions can also be greatly beneficial to air pollution control *** future studies,improvement in the performance of CTMs is exceedingly crucial to obtain a more reliable baseline for the prediction of air quality *** of models to determine the air quality response to emissions under varying meteorological conditions is also necessary in the context of future climate changes,which pose great challenges to the qua

关键词： Air pollution Nonlinear response Air quality management Reduced form models(RFMs) Precursor emissions

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Hybrid Sooty Tern Optimization and Differential Evolution for Feature Selection

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Computer Systems Science & Engineering 2021年第12期39卷 321-335页

作者： Heming jia Yao Li Kangjian Sun Ning cao Helen min Zhou College of Information Engineering Sanming UniversitySanming365004China College of Mechanical and Electrical Engineering Northeast Forestry UniversityHarbin150040China School of Engineering Manukau Institute of TechnologyAuckland2241New Zealand

In this paper,a hybrid model based on sooty tern optimization algo-rithm(STOA)is proposed to optimize the parameters of the support vector machine(SVM)and identify the best feature sets *** selec-tion is an essential process of data preprocessing,and it aims to find the most rele-vant subset of *** recent years,it has been applied in many practical domains of intelligent *** application of SVM in many fields has proved its effectiveness in classification tasks of various *** performance is mainly determined by the kernel type and its *** of the most challenging process in machine learning is feature selection,intending to select effective and representative *** main disadvantages of feature selection processes included in classical optimization algorithm are local optimal stagnation and slow ***,the hybrid model proposed in this paper merges the STOA and differential evolution(DE)to improve the search efficiency and con-vergence rate.A series of experiments are conducted on 12 datasets from the UCI repository to comprehensively and objectively evaluate the performance of the proposed *** superiority of the proposed method is illustrated from dif-ferent aspects,such as the classification accuracy,convergence performance,reduced feature dimensionality,standard deviation(STD),and computation time.

关键词： sooty tern optimization algorithm hybrid optimization feature selection support vector machine

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Viscosity and structure relationship with equimolar substitution of cao with MgO in the cao–MgO–Al_(2)O_(3)–SiO_(2)slag melts

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International Journal of minerals,Metallurgy and Materials 2025年第1期32卷 70-79页

作者： Yong Hou Shuo Zhang Jie Dang jia Guo Hanghang Zhou Xuewei Lü College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing UniversityChongqing 400044China

Currently,the Al_(2)O_(3)content in the high-alumina slag systems within blast furnaces is generally limited to 16wt%–18.5wt%,making it challenging to overcome this *** most studies that concentrated on managing the MgO/Al_(2)O_(3)ratio or basicity,this paper explored the effect of equimolar substitution of MgO for cao on the viscosity and structure of a high-alumina cao-MgO-Al_(2)O_(3)-SiO_(2)slag system,providing theoretical guidance and data to facilitate the application of high-alumina *** results revealed that the viscosity first decreased and then increased with higher MgO substitution,reaching a minimum at 15mol%MgO *** transform infrared spectroscopy(FTIR)results found that the depths of the troughs representing[SiO_(4)]tetrahedra,[AlO_(4)]tetrahedra,and Si-O-Al bending became progressively deeper with increased MgO *** of the Raman spectra showed that the average number of bridging oxygens per Si atom and the X_(Q^(3))/X_(Q^(2))(X_(Q^(i))is the molar fraction of Q^(i) unit,and i is the number of bridging oxygens in a[SiO_(4)]tetrahedral unit)ratio increased from 2.30 and 1.02 to 2.52 and 2.14,respectively,indicating a progressive polymerization of the silicate structure.X-ray photoelectron spectroscopy(XPS)results highlighted that non-bridging oxygen content decreased from 77.97mol% to 63.41mol% with increasing MgO concentration,whereas bridging oxygen and free oxygen contents *** analysis demonstrated a gradual increase in the polymerization degree of the tetrahedral structure with the increase in MgO ***,bond strength is another important factor affecting the slag *** occurrence of a viscosity minimum can be attributed to the complex evolution of bond strengths of non-bridging oxygens generated during depolymerization of the[SiO_(4)]and[AlO_(4)]tetrahedral structures by cao and MgO.

关键词： aluminosilicate viscosity structure spectroscopy

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Microstructure and mechanical property of NbTaTiV refractory high-entropy alloy with different Y_(2)O_(3) contents

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Rare Metals 2022年第10期41卷 3504-3514页

作者： Tao Liao Yuan-Kui cao Wen-min Guo Qi-Hong Fang jia Li Bin Liu State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha410082China

In this study,NbTaTiV refractory high-entropy alloys(RHEAs) reinforced with dispersed oxides were successfully designed and fabricated by mechanical alloying and subsequent spark plasma sintering(SPS).The effects of Y_(2)O_(3) content on the microstructure and mechanical properties have been systematically *** results show that the oxide dispersion strengthening(ODS) RHEAs are mainly composed of body centered cubic(BCC) matrix and multiscale oxides,including submicron Ti-(N,O) particles,nano-sized Y-Ti-O particles and nano-sized Y_(2)O_(3) *** ODS-RHEAs have excellent mechanical properties due to the multisc ale *** the content of Y_(2)O_(3) increasing from 1 wt% to 3 wt% Y_(2)O_(3),the compressive yield strength of the ODSRHEAs significantly increases from 1528 to 1866 MPa,while the fracture strain slightly reduces from 22% to 16%.The enhancement of the mechanical property is mainly attributed to the increased amount of multisc ale oxide particles and the refined grain structure.

关键词： Refractory high-entropy alloy Oxide dispersion strengthening Spark plasma sintering(SPS) Mechanical property Strengthening mechanism

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环状RNA CHACR调控压力超负荷诱导心肌肥大和氧化应激损伤

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中国组织工程研究 2025年第25期29卷 5362-5373页

作者：王霜韩瑜袁敏曹济民孙腾山西医科大学细胞生理学教育部重点实验室山西省细胞生理学重点实验室山西医科大学基础医学院生理学系山西省太原市030001

背景:病理性心肌肥大是多种心脏疾病的危险促进因素,但其发病机制仍未阐明。环状RNA与心肌肥大密切相关,然而环状RNA CHACR在心肌肥大中的作用及调控机制尚未见报道。目的:探究环状RNA CHACR在压力超负荷诱导心肌肥大中的作用及机制。方... 详细信息

背景:病理性心肌肥大是多种心脏疾病的危险促进因素,但其发病机制仍未阐明。环状RNA与心肌肥大密切相关,然而环状RNA CHACR在心肌肥大中的作用及调控机制尚未见报道。目的:探究环状RNA CHACR在压力超负荷诱导心肌肥大中的作用及机制。方法:①心脏原位注射环状RNA CHACR过表达慢病毒1周后进行横向主动脉缩窄手术诱导小鼠心肌肥大。术后8周,计算心脏质量/胫骨长比值和肺质量/胫骨长比值,测量心肌细胞表面积,检测肥大标志基因表达水平和心肌纤维化程度,评估心功能。②H9c2心肌细胞给予环状RNA CHACR过表达慢病毒处理72 h,然后加入1μmol/L血管紧张素Ⅱ处理24 h诱导心肌细胞肥大。通过检测心肌细胞表面积、肥大标志基因表达水平、蛋白质/DNA比值评估细胞肥大情况,通过检测活性氧水平和线粒体膜电位评估氧化应激损伤情况。结果与结论:①在体内和体外心肌肥大模型中,环状RNA CHACR的表达水平均显著降低(P<0.01);②过表达环状RNA CHACR显著抑制了横向主动脉缩窄手术诱导的小鼠心肌肥大表型,主要表现为心脏体积减小、心脏质量/胫骨长比值显著降低(P<0.05),肺质量/胫骨长比值显著降低(P<0.05),心肌细胞表面积显著减小(P<0.05),以及心肌肥大相关标志基因心房利钠肽(P<0.05)、脑钠肽(P<0.05)表达水平降低;③过表达环状RNA CHACR显著抑制了横向主动脉缩窄手术诱导的小鼠心脏纤维化,表现为纤维化面积减小(P<0.01)和纤维化标志基因Acta1的表达水平降低(P<0.05);④过表达环状RNA CHACR显著改善了小鼠心功能,主要表现为射血分数(P<0.05)和短轴缩短率(P<0.01)显著升高;(5)过表达环状RNA CHACR显著抑制了血管紧张素Ⅱ诱导的心肌细胞肥大,主要表现为心肌细胞表面积显著减小(P<0.05),心房利钠肽(P<0.05)和脑钠肽(P<0.05)表达水平显著下调,以及蛋白质/DNA比值显著减小(P<0.05);(6)过表达环状RNA CHACR显著抑制了血管紧张素Ⅱ诱导的活性氧水平升高(P<0.001)和线粒体膜电位降低(P<0.05)。结果表明,环状RNA CHACR在体内和体外心肌肥大模型中表达水平显著降低,过表达环状RNA CHACR显著抑制心肌肥大,减轻心肌纤维化,改善心功能,并且显著减轻了血管紧张素Ⅱ诱导的心肌细胞氧化应激损伤。

关键词：心肌肥大环状RNA CHACR 血管紧张素Ⅱ 横向主动脉缩窄手术氧化应激损伤

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Rno_circ_0005139 regulates apoptosis by targeting Wnt5a in rat anorectal malformations

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World Journal of Gastroenterology 2020年第29期26卷 4272-4287页

作者： Dan Liu Yuan Qu Zheng-Nong cao Hui-min jia Department of Pediatric Surgery Shengjing Hospital of China Medical UniversityShenyang 110004Liaoning ProvinceChina

BACKGROUND The molecular mechanisms underlying anorectal malformations(ARM)are not fully *** RNAs(circRNAs)are new born non-coding RNAs,and their role in ARM is *** assumed that rno_circ_0005139 influences apoptosis and proliferation by acting as a miR-324-3p sponge,and downregulating Wnt5a in *** To identify the differential expression of circRNAs and mRNAs in a rat ARM *** Sixty-six pregnant Wistar rats were randomly divided into two groups:ARM group(2-imidazolidinethione-induced)and control *** were harvested by cesarean delivery,and anorectal tissue was taken on embryonic days 16(E16),17(E17),19(E19),and 21(E21).RNA sequencing and gene microarray analysis was used to identify differentially expressed circRNAs and mRNAs in the ARM in a rat *** selected 6 circRNAs and 3 mRNAs in the Wnt signal pathway from the result of the RNA sequencing and gene microarray analysis,and quantitative reverse transcription polymerase chain reaction was performed to evaluate their tissue *** to bioinformatics prediction,rno_circ_0005139 acted as a miR-324-3p sponge to regulate the expression of *** chose rno_circ_0005139 and Wnt5a as the final *** tested the function of rno_circ_0005139 and the binding sites between rno_circ_0005139 and miR-324-3p,miR-324-3p and Wnt5a by luciferase ***-transfection of rno_circ_0005139 and miR-324-3p was to verify their functional *** We identified 38 upregulated and 42 downregulated circRNAs on E17(P2.0).We found that rno_circ_0006880 and rno_circ_0011386 were upregulated,whereas rno_circ_0000436,rno_circ_0005139,rno_circ_0009285,rno_circ_0014367,Wnt5a,Wnt10b,and Wnt2b were downregulated in ARM *** to bioinformatics prediction,rno_circ_0005139 acted as a miR-324-3p sponge to regulate the expression of *** chose rno_circ_0005139 a

关键词： Anorectal malformation Circular RNA MicroRNA Wnt5a Rno_circ_0005139

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Investigating the thermal conductivity of materials by analyzing the temperature distribution in diamond anvils cell under high pressure

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Chinese Physics B 2022年第4期31卷 219-224页

作者： Caihong jia min cao Tingting Ji Dawei jiang Chunxiao Gao State Key Laboratory of Superhard Materials Jilin UniversityChangchun 130000China College of Mathematics and Physics Inner Mongolia University for NationalitiesTongliao 028043China

Investigating the thermal transport properties of materials is of great importance in the field of earth science and for the development of materials under extremely high temperatures and ***,it is an enormous challenge to characterize the thermal and physical properties of materials using the diamond anvil cell(DAC)*** the present study,a steady-state method is used with a DAC and a combination of thermocouple temperature measurement and numerical analysis is performed to calculate the thermal conductivity of the *** this end,temperature distributions in the DAC under high pressure are *** propose a three-dimensional radiative-conductive coupled heat transfer model to simulate the temperature field in the main components of the DAC and calculate in situ thermal conductivity under high-temperature and high-pressure *** proposed model is based on the finite volume *** obtained results show that heat radiation has a great impact on the temperature field of the DAC,so that ignoring the radiation effect leads to large errors in calculating the heat transport properties of ***,the feasibility of studying the thermal conductivity of different materials is discussed through a numerical model combined with locally measured temperature in the *** article is expected to become a reference for accurate measurement of in situ thermal conductivity in DACs at high-temperature and high-pressure conditions.

关键词： thermal conductivity heat radiation effect temperature field diamond anvil cell

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Effect of deformation of diamond anvil and sample in diamond anvil cell on the thermal conductivity measurement

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Chinese Physics B 2021年第12期30卷 473-478页

作者： Caihong jia Dawei jiang min cao Tingting Ji Chunxiao Gao State Key Laboratory of Superhard Materials Jilin UniversityChangchun 130000China

Studies show that the sample thickness is an important parameter in investigating the thermal transport properties of materials under high-temperature and high-pressure(HTHP)in the diamond anvil cell(DAC)***,it is an enormous challenge to measure the sample thickness accurately in the DAC under severe working *** conventional methods,the influence of diamond anvil deformation on the measuring accuracy is *** a hightemperature anvil,the mechanical state of the diamond anvil becomes complex and is different from that under the static *** high temperature,the deformation of anvil and sample would be *** the present study,the finite volume method is applied to simulate the heat transfer mechanism of stable heating DAC through coupling three radiativeconductive heat transfer mechanisms in a high-pressure *** the temperature field of the main components is known in DAC,the thermal stress field can be analyzed numerically by the finite element *** obtained results show that the deformation of anvil will lead to the obvious radial gradient distribution of the sample *** the top and bottom surfaces of the sample are approximated to be flat,it will be fatal to the study of the heat transport properties of the ***,we study the temperature distribution and thermal conductivity of the sample in the DAC by thermal-solid coupling method under high pressure and stable heating condition.

关键词： diamond anvil cell deformation thermal conductivity thermal-solid coupling method

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Exploring the Association Between Infectious Diarrheal Diseases and Sea Surface Temperatures—Coastal Areas of China,2009–2018

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China CDC weekly 2022年第7期4卷 126-129页

作者： min Xu Chunxiang cao Heyi Guo Yiyu Chen Zhongwei jia State Key Laboratory of Remote Sensing Science Aerospace Information Research InstituteChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina School of Public Health Peking UniversityBeijingChina

Summary What is already known about this topic?Coastal areas of China have a higher reported incidence of other infectious diarrheal diseases(OIDD;excluding cholera,dysentery,typhoid,and paratyphoid)than inland areas of *** is added by this report?The incidence of OIDD in high latitude coastal provincial-level administrative divisions(PLADs)near Bohai Sea was positively correlated with sea surface temperatures(SSTs),while in coastal PLADs near the South China Sea was negatively *** are the implications for public health practice?The marine environmental risk factors acquired by remote sensing provide a new way for diseases surveillance and early *** can be employed as predictor of OIDD in some coastal areas in China.

关键词： China. coastal inland

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No-tillage effects on grain yield and nitrogen requirements in hybrid rice transplanted with single seedlings: Results of a long-term experiment

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Journal of Integrative Agriculture 2019年第1期18卷 24-32页

作者： HUANG min CHEN jia-na cao Fang-bo ZOU Ying-bin Norman Uphoff Southern Regional Collaborative Innovation Center for Grain and Oil Crops (CICGO) Hunan Agricultural University International Programs-College of Agriculture and Life Sciences (IP-CALS) Cornell University

This study was conducted to determine whether,and if so how,the grain yield and nitrogen(N) requirements of hybrid rice transplanted as single seedlings are affected by no-tillage(NT) practices.A fixed field experiment was done at the Experimental Farm of Hunan Agricultural University in Changsha,Hunan Province,China,from 2004 to *** yield and yield attributes(panicle number per m2,spikelet number per panicle,spikelet filling percentage,grain weight,total biomass,and harvest index) were evaluated as well as the N-use characteristics(total N uptake,internal N-use efficiency,and N requirements) of hybrid rice transplanted as single seedlings comparing NT with conventional tillage(CT).A significant finding was that there were no significant differences in grain yield,yield attributes,and N-use characteristics between CT and *** across the 11 years,grain yield and N requirements were 9.51 t ha^(-1) and 20.2 kg t^(-1) under CT and 9.33 t ha^(-1) and 20.0 kg t^(-1) under NT,*** were significant yearly variations in grain yield,yield attributes,and N-use characteristics observed under both CT and *** yearly variation in grain yield was related to simultaneous changes in spikelet number per panicle,grain weight,total biomass,and harvest ***,it was found that grain yield was positively correlated with internal N-use efficiency but negatively correlated with N *** is concluded that grain yield and N requirements in hybrid rice when transplanted as single seedlings are not affected adversely by *** results of this study suggest that(1) compatible relationships among yield attributes can be established in hybrid rice that is transplanted as single seedlings,and(2) higher grain yield and higher N-use efficiency can be concurrently achieved in hybrid rice transplanted as single seedlings.

关键词： grain yield hybrid rice nitrogen requirements no-tillage transplanting of single seedlings

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