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Photothermal properties of Cu@polycarbonate composites with strong localized surface plasmon resonances

Nano Research 2024年第9期17卷 8513-8520页

作者： Fengyi Wang Jiangling He Junshan Hu Zhihui Chen Yumeng shi qing-Hua Xu SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Department of Chemistry National University of Singapore3 Science Drive 3Singapore 117543Singapore College of Materials Science and Engineering Sichuan UniversityChengdu 610065China

Copper is relatively low cost and highly abundant compared with the well-studied noble metals such as gold and ***,the poor plasmonic and high susceptibility towards oxidation limit the study of its optical properties and applications as ***,copper nanoparticles@polycarbonate(Cu@PC)composites were prepared by using a facile one-step solvothermal *** Cu@PC composites have strong localized surface plasmon resonances(LSPR)due to that the PC shell can induce the particles to form many-particles system with different particle numbers,which not only lead to overlap and hybridize of the LSPR modes,but also shift the LSPR away from the interband transitions,and the PC layer also prevents the oxidation of Cu *** photothermal conversion efficiency of Cu@PC composites reaches 41.1%under 808 nm continuous wave(CW)laser irradiation which is higher than previously reported Cu nanomaterials that have been ***,the composites also have high photothermal ***,interfacial evaporator is prepared by assembling the Cu@PC composites on scouring sponge as light absorption layer which has>92.8%absorption in entire solar spectrum *** seawater evaporation rate is 3.177 kg·m^(-2)·h^(-1)with a E_(evaporator)/E_(water)of *** high evaporation rate interfacial evaporator with low cost,simple,and scalable approach shows great application value in the field of photothermal evaporation.

关键词： Cu nanoparticles localized surface plasmon resonances(LSPR) photothermal interfacial evaporation

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Aberrant LETM1 elevation dysregulates mitochondrial functions and energy metabolism and promotes lung metastasis in osteosarcoma

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Genes & Diseases 2024年第3期11卷 368-384页

作者： Yulu shi Quan Kang Hong Zhou Xiaohan Yue Yang Bi qing Luo Stem Cell Biology and Therapy Laboratory The Children's Hospital of Chongqing Medical UniversityNational Clinical Research Center for Child Health and DisordersMinistry of Education Key Laboratory of Child Development and DisordersChongqing Key Laboratory of PediatricsChongqing 400014China Department of Pediatric Surgery The Children's Hospital of Chongqing Medical UniversityChongqing 400014China

Osteosarcoma is a differentiation-deficient disease,and despite the unique advan-tages and great potential of differentiation therapy,there are only a few known differentia-tion inducers,and little research has been done on their *** differentiation is associated with an increase in mitochondrial content and *** metabolism of some tu-mor cells is characterized by impaired oxidative phosphorylation,as well as up-regulation of aerobic glycolysis and pentose phosphate ***-containing zipper and EF-hand transmembrane protein 1(LETM1)is involved in the maintenance of mitochondrial morphology and is closely associated with tumorigenesis and progression,as well as cancer cell *** found that MG63 and 143B osteosarcoma cells overexpress LETM1 and exhibit abnormalities in mitochondrial structure and *** of LETM1 partially restored the mitochon-drial structure and function,inhibited the pentose phosphate pathway,promoted oxidative phosphorylation,and led to osteogenic *** also inhibited spheroid cell forma-tion,proliferation,migration,and invasion in an in vitro *** LETM1 was knocked down in vivo,there was reduced tumor formation and lung *** data suggest that mitochondria are aberrant in LETM1-overexpressing osteosarcoma cells,and knockdown of LETM1 partially restores the mitochondrial structure and function,inhibits the pentose phosphate pathway,promotes oxidative phosphorylation,and increases osteogenic differentiation,thereby reducing malignant biological behavior of the cells.

关键词： Cancer metabolism Differentiation LETM1 Osteosarcoma Stemness

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Warming intensified the effects of nitrogen addition on N_(2)O emissions from alpine meadow in the northern qinghai-Tibet Plateau

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Advances in Climate Change Research 2024年第1期15卷 101-112页

作者： Ming-Jie LI Yi-qing GE Hasbagan GANJURJAV Guo-Zheng HU Hong-Bao WU Jun YAN shi-Cheng HE qing-Zhu GAO Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural SciencesBeijing 100081China National Agricultural Experimental Station for Agricultural Environment Nagqu 852100China Ecology and Nature Conservation Institute Chinese Academy of ForestryBeijing 100091China College of Resource and Environment Anhui Science and Technology UniversityFengyang 233100China Nagqu Agriculture Animal Husbandryand Prataculture Science and Technology Research and Extension CenterNagqu 852100China Tongliao Experimental Middle School Tongliao 028000China

Warming and nitrogen(N)addition may impact soil nitrous oxide(N_(2)O)emissions,but the relationship between plant community composition and soil microbial activities remains *** a two-year field study in the qinghai-Tibet Plateau,open-top chambers were used to quantify the effects of warming,N-addition,and their interactions on N_(2)O *** found that the N-addition greatly increased N_(2)O emissions by 77.4%in 2018 when compared to the control *** contrast,warming showed little effect on N_(2)0 emissions but did increase the activity of enzymes associated with soil nitrification and denitrification.A combined effect of warming and N-addition of resulted in 208.6%(2018)and 90.8%(2019)increase in N_(2)0 emissions,respectively,compared to the individual treatments of warming or *** warming in alpine meadows is causally linked to increased legume biomass which is further intensified with the *** legume biomass(p<0.05),soil moisture(p<0.001)and enzyme activity(p<0.001)had a positive effect on N_(2)0 emissions,while diminished microbial carbon/nitrogen(MBC/MBN)(p<0.05)correlated with reduced N_(2)O *** results indicated that N-addition has a positive effect on N_(2)O emissions,and the addition of warming further intensifies this *** increased dominance of legumes and microbial N content contributes to this *** outcomes suggest that warming and atmospheric N deposition can stimulate N_(2)O emissions of alpine meadows inthefuture.

关键词： Alpine meadow Community composition Nitrogen addition Nitrous oxide flux qinghai-Tibet Plateau Warming

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Insight into the role of ethylene glycol on thermodynamics and nucleation kinetics of dimethyl terephthalate in mixed solvent system

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Particuology 2024年第2期85卷 1-12页

作者： Yujin Zhang Chunyan shi Jing Tang Li Liu Dongxia Yan qing Zhou Xingmei Lu Songyan Jia College of Chemical Engineering Shenyang University of Chemical TechnologyShenyang110142China Bejing Key Laboratoryoflonic Liquids Clean Process CAS Key LaboratoryofGreen Process and EngineeringState Key Laboratoryof Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China School of Chemistry and Chemical Engineering Qingdao UniversityQingdao266071China Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou450001China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China

Dissolution and nucleation are two essential processes for industrial *** paper in-vestigates the effect of ethylene glycol addition on the crystallization behavior of dimethyl terephthalate(DMT)in *** DMT solubility in mixed solvent system(methanol-ethylene glycol)was deter-mined by isothermal satiation approach,and the solubility was associated using seven *** model fitting results were consistent with the experimental *** on the results,the metastable zone width(MSZW)of DMT was detected by the polythermal approach;the modified Sangwal's theory was used to investigate the nucleation behavior,which can provide a new way of thought for better analysis of the crystallization *** results demonstrated that MSZW was associated with various elements,such as cooling rate,saturation temperature and mass fraction of ethylene *** addition of ethylene glycol slowed down the nucleation rate as shown by the broadening of *** derive the solid-liquid interface energy,the nucleation driving force,the critical nucleation size and the critical Gibbs free energy according to the classical nucleation *** is demonstrated that the nucleation driving force and the solid-liquid interface energy are dependent and jointly influence the MSZW.

关键词： Dissolution Nucleation Solubility Apparent thermodynamic parameters Metastable zone width Solid-liquid interface energy

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Oilfield analogy and productivity prediction based on machine learning: Field cases in PL oilfield, China

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Petroleum Science 2024年第4期21卷 2554-2570页

作者： Wen-Peng Bai shi-qing Cheng Xin-Yang Guo Yang Wang Qiao Guo Chao-Dong Tan State Key Laboratory of Petroleum Resources and Engineering China University of Petroleum (Beijing)

In the early time of oilfield development, insufficient production data and unclear understanding of oil production presented a challenge to reservoir engineers in devising effective development plans. To address this challenge, this study proposes a method using data mining technology to search for similar oil fields and predict well productivity. A query system of 135 analogy parameters is established based on geological and reservoir engineering research, and the weight values of these parameters are calculated using a data algorithm to establish an analogy system. The fuzzy matter-element algorithm is then used to calculate the similarity between oil fields, with fields having similarity greater than 70% identified as similar oil fields. Using similar oil fields as sample data, 8 important factors affecting well productivity are identified using the Pearson coefficient and mean decrease impurity（MDI） method. To establish productivity prediction models, linear regression（LR）, random forest regression（RF）, support vector regression（SVR）, backpropagation（BP）, extreme gradient boosting（XGBoost）, and light gradient boosting machine（Light GBM） algorithms are used. Their performance is evaluated using the coefficient of determination（R2）, explained variance score（EV）, mean squared error（MSE）, and mean absolute error（MAE） metrics. The Light GBM model is selected to predict the productivity of 30 wells in the PL field with an average error of only 6.31%, which significantly improves the accuracy of the productivity prediction and meets the application requirements in the field. Finally, a software platform integrating data query,oil field analogy, productivity prediction, and knowledge base is established to identify patterns in massive reservoir development data and provide valuable technical references for new reservoir development.

关键词： Data mining technique Analogy parameters Oilfield analogy Productivity prediction Software platform

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Design parameter optimization method for a prestressed steel structure driven by multi-factor coupling

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Frontiers of Structural and Civil Engineering 2024年第7期18卷 1066-1083页

作者： Guo-Liang shi Zhan-Sheng LIU De-Chun LU qing-Wen ZHANG Majid DEZHKAM Ze-Qiang WANG Faculty of Architecture Civil and Transportation EngineeringBeijing University of TechnologyBeijing 100124China The Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education Beijing University of TechnologyBeijing 100124China Beijing Building Construction Research Institute Co. Ltd.Beijing 100039China

To achieve efficient structural design,it is crucial to reduce the cost of materials while ensuring structural *** study proposes an optimization method for design parameters(DPs)in a prestressed steel structure driven by multi-factor *** accomplish this,a numerical proxy model of prestressed steel structures is established with integration of DPs and mechanical parameters(MPs).A data association-parameter analysis-optimization selection system is established.A correlation between DPs and MPs is established using a back propagation(BP)neural *** correlation provides samples for parameter analysis and optimization *** are used to characterize the safety of the *** on the safety grade analysis,the key DPs that affect the mechanical properties of the structure are obtained.A mapping function is created to match the MPs and the key *** optimal structural DPs are obtained by setting structural materials as the optimization objective and safety energy as the constraint *** theoretical model is applied to an 80-m-span gymnasium and verified with a scale test physical *** MPs obtained using the proposed method are in good agreement with the experimental *** with the traditional design method,the design cycle can be shortened by more than 90%.Driven by the optimal selection method,a saving of more than 20% can be achieved through reduction of structural material ***,the cross-sectional dimensions of radial cables have a substantial influence on vertical *** initial tension and cross-sectional size of the upper radial cable exhibit the most pronounced impact on the stress distribution in that *** initial tension and cross-sectional size of the lower radial cable hold the greatest sway over the stress distribution in that cable.

关键词： structure design association relationship performance analysis optimum selection experimental verification

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面向知识管理系统实现的软件基础设施研究

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计算机集成制造系统 2008年第11期14卷 2191-2198页

作者：张明宝施青青南京航空航天大学经济与管理学院信息管理与电子商务系江苏南京210016

为降低知识管理系统开发的难度,提出了通过面向知识管理系统实现的软件基础设施来辅助知识管理系统开发的思想。给出了知识管理系统软件基础设施的系统体系结构,并描述了一种可行的技术实现方案。

关键词：知识管理系统信息管理软件基础设施信息技术非结构信息管理架构

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Progress in models for coupled human and natural systems

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Science China Earth Sciences 2024年第11期67卷 3631-3637页

作者： Tianxiang YUE Chenchen WU Wenjiao shi Yongzhong TIAN qing WANG Yimin LU Lili ZHANG State Key Laboratory of Resources and Environment Information System Institute of Geographical Sciences and Natural Resources ResearchChinese Academy of Sciences College of Resources and Environment University of Chinese Academy of Sciences School of Geographical Sciences Southwest University National Institute of Environmental Health Chinese Center for Disease Control and Prevention National Engineering Research Center of Geospatial Information Technology Fuzhou University The Aerospace Information Research Institute Chinese Academy of Sciences

1. Introduction Malthus (1798) was one of the earliest researchers to propose a coupled human-natural system (CHANS) model, particularly in his analysis of the relationship between population growth and food supply. He argued that while population grows geometrically, food supply increases only arithmetically, suggesting that this imbalance could eventually lead to a food crisis due to diminishing per capita food availability (Malthus, 1798).

关键词： ECOLOGICAL-SYSTEMS SUSTAINABILITY POPULATION COMPLEXITY DECISIONS FRAMEWORK DYNAMICS EARTH

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纳米Cu^0@Fe3O4活化PMS降解对-硝基苯酚的协同反应机制

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环境科学 2020年第10期41卷 4615-4625页

作者：石清清蒲生彦杨犀成都理工大学生态环境学院成都610059 成都理工大学国家环境保护水土污染协同控制与联合修复重点实验室成都610059 中国环境科学研究院环境基准与风险评估国家重点实验室北京100012

为解决纳米Cu^0活化过硫酸盐体系主要依赖浸出铜离子参与均相反应且适应pH范围窄(<7)的缺陷,本研究采用共沉淀法制备了纳米Cu^0@Fe3O4催化剂,以对-硝基苯酚(PNP)为目标污染物,较系统地考察了Cu^0@Fe3O4活化PMS的性能和降解PNP的反应机制... 详细信息

为解决纳米Cu^0活化过硫酸盐体系主要依赖浸出铜离子参与均相反应且适应pH范围窄(<7)的缺陷,本研究采用共沉淀法制备了纳米Cu^0@Fe3O4催化剂,以对-硝基苯酚(PNP)为目标污染物,较系统地考察了Cu^0@Fe3O4活化PMS的性能和降解PNP的反应机制.结果表明:(1)pH=5.65、200 mg·L^-1 Cu^0@Fe3O4和0.5 mmol·L^-1 PMS在60 min内对5 mg·L^-1 PNP的降解率可达到96%;(2)在Cu^0@Fe3O4/PMS体系中,总铜离子(TCu)和总亚铜离子(TCu+)以及铁离子浸出几乎可以忽略,可认为是非均相反应体系;(3)通过包覆Fe3O4成功改变了Cu^0活化PMS降解PNP的反应途径,在5~9的pH范围内都具有良好的降解性能;(4)反应体系中存在SO-4·和HO·两种活性自由基,对反应体系的贡献率分别为34%和60%,HO·是主导自由基;(5)体系中Fe和Cu之间存在双金属协同作用,Cu(Ⅰ)的存在能够促进Fe(Ⅲ)还原为Fe(Ⅱ),从而形成良好的氧化还原循环,提高了反应体系的持久性.

关键词： Cu^0@Fe3O4 活化过一硫酸盐对-硝基苯酚(PNP) 非均相反应协同修复

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Study about the Acquisition of the English Relative Clauses for Chinese Middle School Students

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海外英语 2020年第3期 258-260页

作者：石晴晴 Zhengzhou Technology and Business University Zhengzhou 450000China

In recent four decades, relative clause has interested many scholars due to its unique structural complexity. This articletook Chinese senior high school students as subjects and found their acquisition order of relative clauses fully coincided with Ku-no’s Perceptual Difficulty Hypothesis but partly agreed with Keenan&Comire’s Noun Phrase Accessibility Hypothesis and Hamil-ton’s SO Hierarchal Hypothesis, which can provide implications and references for the English relative clauses’ learning andteaching.

关键词： senior high school students English relative clauses acquisition order hypotheses implications

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