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Metamaterial terahertz device with temperature regulation function that can achieve perfect absorption and complete reflection conversion of ultrawideband

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Communications in Theoretical Physics 2024年第7期76卷 123-133页

作者： Hao Sun Zao yi Can ma Shubo Cheng Bin Tang Qingdong Zeng Sohail Ahmad School of mathematics and Science Joint Laboratory for Extreme Conditions Matter PropertiesState Key Laboratory of Environment-Friendly Energy MaterialsTianfu Institute of Research and InnovationSouthwest University of Science and TechnologyMianyang 621010China Department of Oncology Sichuan Science City HospitalMianyangSichuan Province621000China School of Chemistry and Chemical Engineering Jishou UniversityJishou 416000China School of Physics and Optoelectronic Engineering Yangtze UniversityJingzhouHubei 434023China School of Microelectronics and Control Engineering Changzhou UniversityChangzhou 213164China School of Physics and Electronic Information Engineering Hubei Engineering UniversityXiaogan 432000China Institute of Physics Bahauddin Zakariya UniversityMultan 66000Pakistan

The field of terahertz devices is important in terahertz ***,most of the current devices have limited functionality and poor *** improve device performance and achieve multifunctionality,we designed a terahertz device based on a combination of VO_(2)and *** device can be tuned using the phase-transition characteristics of VO_(2),which is included in the triple-layer structure of the device,along with SiO_(2)and *** terahertz device exhibits various advantageous features,including broadband coverage,high absorption capability,dynamic tunability,simple structural design,polarization insensitivity,and incidentangle *** simulation results showed that by controlling the temperature,the terahertz device achieved a thermal modulation range of spectral absorption from 0 to *** 313 K,the device exhibited complete reflection of terahertz *** the temperature increased,the absorption rate also *** the temperature reached 353 K,the device absorption rate exceeded 97.7%in the range of 5-8.55 *** study used the effective medium theory to elucidate the correlation between conductivity and temperature during the phase transition of VO_(2).Simultaneously,the variation in device performance was further elucidated by analyzing and depicting the intensity distribution of the electric field on the device surface at different ***,the impact of various structural parameters on device performance was examined,offering valuable insights and suggestions for selecting suitable parameter values in real-world *** characteristics render the device highly promising for applications in stealth technology,energy harvesting,modulation,and other related fields,thus showcasing its significant potential.

关键词： terahertz perfect absorption complete reflection temperature regulation ultrawideband smart device

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An Experimental Study on the Effect of a Nanofluid on Oil-Water Relative Permeability

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Fluid Dynamics & materials Processing 2024年第6期20卷 1265-1277页

作者： Hui Tian Dandan Zhao Yannan Wu Xingyu yi Jun ma Xiang Zhou Baikouquan Oil Production Plant PetroChina Xinjiang Oilfield CompanyKaramay834000China Research Institute of Petroleum Exploration Development PetroChina Liaohe OilfieldPanjin124010China Petroleum Engineering School Southwest Petroleum UniversityChengdu610500China Oil and Gas Development Haosheng Xincheng Energy TechnologyLtd.of SicuanChengdu610213China

The low porosity and low permeability of tight oil reservoirs call for improvements in the current technologies for oil *** chemical solutions with large molecular size cannot effectively flow through the nanopores of the *** this study,the feasibility of Nanofluids has been investigated using a high pressure high temperature core-holder and nuclear magnetic resonance(NMR).The results of the experiments indicate that the specified Nanofluids can enhance the tight oil recovery *** water and oil relative permeability curve shifts to the high water saturation side after Nanofluid flooding,thereby demonstrating an increase in the water wettability of the *** the Nanofluid flooding process the oil recovery was enhanced by 15.1%,compared to waterflooding *** T2 spectra using the NMR show that after Nanofluid flooding,a 7.18%increment in oil recovery factor was gained in the small pores,a 4.9%increase in the middle pores,and a 0.29%increase in the large *** results confirm that the Nanofluids can improve the flow state in micro-sized pores inside the core and increase the ultimate oil recovery factor.

关键词： Tight oil reservoir nanofluid relative permeability nuclear magnetic resonance T2 spectrum

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Recent progress in ternary mixed matrix membranes for CO_(2) separation

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Green Energy & Environment 2024年第5期9卷 831-858页

作者： Zikang Qin Yulei ma Jing Wei Hongfang Guo Bangda Wang Jing Deng Chunhai yi Nanwen Li Shouliang yi yi Deng Wentao Du Jian Shen Wenju Jiang Lu Yao Lin Yang Zhongde Dai College of Architecture and Environment Sichuan UniversityChengdu610065China College of Carbon Neutrality Future Technology Sichuan UniversityChengdu610065China National Engineering Research Centre for Flue Gas Desulfurization Chengdu610065China Carbon Neutral Technology Innovation Center of Sichuan Chengdu610065China School of Chemical Biological and Materials EngineeringUniversity of OklahomaNormanOK73019USA Shaanxi Key Laboratory of Energy Chemical Process Intensification School of Chemical Engineering and TechnologyXi'an Jiaotong UniversityXi'an710049China State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan030001China US DOE Natl Energy Technol Lab626 Cochrans Mill RdPittsburghPA 15236USA DongFang Boiler Co. Ltd.China Clean Combustion and Flue Gas Purification Key Laboratory of Sichuan Province Chengdu611731China College of Environment and Resources Xiangtan UniversityXiangtan411105China

Mixed matrix membranes(MMMs)could combine the advantages of both polymeric membranes and porousﬁllers,making them an effective alternative to conventional polymer ***,interfacial incompatibility issues,such as the presence of interfacial voids,hardening of polymer chains,and blockage of micropores by polymers between common MMMsﬁllers and the polymer matrix,currently limit the gas sep-aration performance of *** phase MMMs(consisting of aﬁller,an additive,and a matrix)made by adding a third compound,usually functionalized additives,can overcome the structural problems of binary phase MMMs and positively impact membrane separation *** review introduces the structure and fabrication processes for ternary MMMs,categorizes various nanoﬁllers and the third component,and summarizes and analyzes in detail the CO_(2) separation performance of newly developed ternary MMMs based on both rubbery and glassy *** on this separation data,the challenges of ternary MMMs are also ***,future directions for ternary MMMs are proposed.

关键词： CO_(2) separation Mixed matrix membranes Ternary phase

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Li-Rich Organosulfur Cathode with Boosted Kinetics for High-Energy Lithium-Sulfur Batteries

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Energy & Environmental materials 2024年第4期7卷 118-125页

作者： ting ma Jiaojiao Deng Yuxiao Lin Qinghua Liang Liang Hu Xiaohu Wang Jun Liu Xinsheng Zhao yinwei Li Ding Nan Xiaoliang Yu College of Chemistry and Chemical Engineering Inner Mongolia University Inner Mongolia Key Laboratory of Graphite and Graphene for Energy Storage and Coating School of Materials Science and Engineering Inner Mongolia University of Technology Shenzhen Key Laboratory on Power Battery Safety and Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate School (SIGS) School of Physics and Electronic Engineering Jiangsu Normal University Key Laboratory of Rare Earth Ganjiang Innovation Academy Chinese Academy of Sciences Department of Mechanical Engineering Research Institute for Smart EnergyThe Hong Kong Polytechnic University

Organosulfur materials containing sulfur-sulfur bonds are an emerging class of high-capacity cathodes for lithium ***,it remains a great challenge to achieve rapid conversion reaction kinetics at practical testing conditions of high cathode mass loading and low electrolyte *** this study,a Li-rich pyrolyzed polyacrylonitrile/selenium disulfide（pPAN/Se2S3） composite cathode is synthesized by deep lithiation to address the above challenges.

关键词： Electrolytes

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Risk assessment of oil and gas investment environment in countries along the Belt and Road Initiative

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Petroleum Science 2024年第2期21卷 1429-1443页

作者： Bao-Jun Tang Chang-Jing Ji Yu-Xian Zheng Kang-Ning Liu yi-Fei ma Jun-Yu Chen Center for Energy and Environmental Policy Research Beijing Institute of TechnologyBeijing100081China School of management and Economics Beijing Institute of TechnologyBeijing100081China Collaborative Innovation Center of Electric Vehicles in Beijing BeijingChina Sustainable Development Research Institute for Economy and Society of Beijing BeijingChina Institute of Carbon Neutrality ShanghaiTech UniversityShanghai201210China

With the implementation of the Belt and Road Initiative, China is deepening its cooperation in oil and gas resources with countries along the Initiative. In order to better mitigate risks and enhance the safety of investments, it is of significant importance to research the oil and gas investment environment in these countries for China's overseas investment macro-layout. This paper proposes an indicator system including 27 indicators from 6 dimensions. On this basis, game theory models combined with global entropy method and analytic hierarchy process are applied to determine the combined weights, and the TOPSIS-GRA model is utilized to assess the risks of oil and gas investment in 76 countries along the Initiative from 2014 to 2021. Finally, the GM(1,1) model is employed to predict risk values for 2022-2025. In conclusion, oil and gas resources and political factors have the greatest impact on investment environment risk, and 12 countries with greater investment potential are selected through cluster analysis in conjunction with the predicted results. The research findings may provide scientific decisionmaking recommendations for the Chinese government and oil enterprises to strengthen oil and gas investment cooperation with countries along the Belt and Road Initiative.

关键词： Belt and Road Initiative Oil and Gas Investment Risk assessment

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Lithium Sulfur Batteries:Insights from Solvation Chemistry to Feasibility Designing Strategies for Practical Applications

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Energy & Environmental materials 2024年第4期7卷 5-27页

作者： Jian Tan Longli ma Yuan Wang Pengshu yi Chuming Ye Zhan Fang Zhiheng Li Mingxin Ye Jianfeng Shen Institute of Special materials and Technology Fudan University Department of materials Science Fudan University Department of Chemistry Fudan University

Rechargeable lithium-sulfur (Li-S) batteries,featuring high energy density,low cost,and environmental friendliness,have been dubbed as one of the most promising candidates to replace current commercial rechargeable Li-ion ***,their practical deployment has long been plagued by the infamous"shuttle effect"of soluble Li polysulfides (LiPSs) and the rampant growth of Li dendrites.

关键词： characterization tools design strategies Li–S batteries practical applications solvation chemistry

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Global epidemiology of mental disorder in atrial fibrillation between 1998-2021:A systematic review and meta-analysis

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World Journal of Psychiatry 2024年第1期14卷 179-193页

作者： Shuai Zhang Na Zhang Liu Liu Wang Zheng Zi-Lin ma Si-Yu Qiao ying-Li Zhao yi-Hong Wei Gang Wu Qiu-ting Yu Bing Deng Lin Shen Department of Cardiology LongHua Hospital Shanghai University of Traditional Chinese MedicineShanghai 200032China Department of Dermatology Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghai 200437China

BACKGROUND As the burden of mental disorders among patients with atrial fibrillation(AF)increases,researchers are beginning to pay close attention to the risk and prevalence of these *** studies have independently analyzed the risk of comorbidity with depression and anxiety in patients with AF,no study has systematically focused on the global epidemiology of these two mental *** To explore the prevalence of depression and anxiety in patients with *** Five databases were searched from their date of establishment until January *** studies reporting the comorbidity of AF with depression and anxiety,were included in this *** information,such as the first author/publication year,study year,study type,and prevalence of depression and anxiety,were *** SE 15.1 was used to analyze the ***,meta-regression,and sensitivity analyses were performed to estimate study *** After a thorough search,26 studies were identified and included in this *** prevalence rates of depression and anxiety in adults with AF were 24.3%and 14.5%,*** adult males with AF,the prevalence was 11.7%and 8.7%,respectively,whereas in females it was 19.8%and 10.1%,*** older adults with AF,the prevalence rates of depression and anxiety were 40.3%and 33.6%,*** highest regional prevalence of depression and anxiety was observed in European(30.2%)and North American(19.8%)patients with *** In this study,we found that the prevalence of depression and anxiety among patients with AF varies with sex,region,and evaluation scales,suggesting the need for psychological interventions for patients with AF in clinical practice.

关键词： Atrial fibrillation Depression Anxiety Prevalence

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A homopolymolybdate-supported plate-like 2D cobalt network constructed from a new pyrazole-amide-pyridyl ligand: highly electrochemical activity in both capacitive performance and the detection of Cr(Ⅵ)

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Tungsten 2024年第2期6卷 422-427页

作者： Xiu-Li Wang Yong-Zhen Chen Zhi-Han Chang Yu-Chun Lin Jing-yi ma College of Chemistry and materials Engineering Bohai UniversityJinzhou 121013China Professional Technology Innovation Center of Liaoning Province for Conversion materials of Solar Cell Jinzhou 121013China

By employing a new semi-rigid pyrazole-amide-derived bis(pyridyl)ligand[N,N'-bis(4-picolylamine)-1-hydropyrazole(4-dpap)],a new homopolymolybdate-based two-dimensional(2D)plate-like complex[Co(4-dpap)(H_(2)O)(β-Mo_(8)O_(2)6)1/2](1)has been prepared under solvothermal condition and structurally ***β-Mo_(8)anions are fi xed between the 2D metal–organic networks[Co(4-dpap)(H_(2)O)]n 2n+via hydrogen-bonding *** 1 possesses satisfactory specifi c capacitance of 1512.4 F·g^(−1)(current density:1 A·g^(−1))and good cycling stability(90.8%after 1000 cycles).Moreover,1 represents a promising amperometric sensor for measurement of Cr(Ⅵ)with low detection limit(0.042μmol·L^(−1))and high *** insertion ofβ-Mo_(8)anions between the unique 2D metal−organic networks improves the active area of polyoxometalates,which further promotes electrochemical performance.

关键词： Homopolymolybdate Metal–organic network Pyrazole-amide-derived bis(pyridyl)ligand Supercapacitor Electrochemical sensor

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Effectiveness of Acupoint Application in Patients with Pharyngeal Pain: Evidence from CHUNBO, A Prospective Real-World Study

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Chinese Journal of Integrative Medicine 2024年第1期30卷 18-24页

作者： ma Hang-kun WANG yi-ming GUO man-ping LI Chen-fei LI Rui GAO Rui Emergency Department Xiyuan Hospital Affiliated to China Academy of Chinese Medical SciencesBeijing(100091)China National Medical Products Administration for Laboratory of Clinical Research and Evaluation of Traditional Chinese Medicine Beijing(100091)China National Clinical Research Center for Chinese Medicine Cardiology Beijing(100091)China Postdoctoral Workstation of Yabao Pharmaceutical Group Co. Ltd.YunchengShanxi Province(044602)China

Objective: To assess the outcomes after acupoint application in patients with pharyngeal pain in a real-world settings, and analyze the characteristics of effective population and prescription characteristics of acupoint application. Methods: Based on CHUNBO platform, patients with pharyngeal pain who were candidates for acupoint application on the basis of physician-evaluation, were enrolled in a nationwide, prospective, 69-week multicenter observational study from August 2020 to February 2022. Propensity score matching(PSM) was used to match the confounding factors and the association rules were used to analyze the characteristics of effective population and prescription characteristics of acupoint application. Outcome assessments included the disappearance rate of pharyngeal pain(within 3, 7, and 14 days), disappearance time of pharyngeal pain, as well as adverse events. Results: Of 7,699 enrolled participants, 6,693(86.9%) received acupoint application and 1,450(21.7%) with non-acupoint application. After PSM, there were 1,004 patients each in the application group(AG) and non-application group(NAG). The disappearance rate of pharyngeal pain in the AG at 3, 7, and 14 days were all higher than those in the NAG(Pmainly 3–6 years old(40.21%). The disappearance rate of pharyngeal pain in the application group with tonsil diseases was 2.19 times higher than that in the NAG(Pma Rhei, and Herba Ephedrae. Among them, Natrii sulfas was applied to RN 8 most frequently(support 84.39%). A total of 1,324(17.2%) patients experienced AEs, and mainly occurred in the AG, with s

关键词： acupoint application Chinese medicine pharyngeal pain multicentre effectiveness characters real-world study

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基于有向图的分布式连续时间非光滑耦合约束凸优化分析

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自动化学报 2024年第1期50卷 66-75页

作者：刘奕葶马铭莙付俊东北大学流程工业综合自动化国家重点实验室沈阳110819

研究一类分布式优化问题,其目标是在满足耦合不等式约束和局部可行集约束的情况下使非光滑全局代价函数值最小.首先,对原有的分布式连续时间投影算法进行拓展,结合线性代数理论分析,设计一个适用于强连通加权平衡有向通信网络拓扑图的算... 详细信息

研究一类分布式优化问题,其目标是在满足耦合不等式约束和局部可行集约束的情况下使非光滑全局代价函数值最小.首先,对原有的分布式连续时间投影算法进行拓展,结合线性代数理论分析,设计一个适用于强连通加权平衡有向通信网络拓扑图的算法.其次,在局部代价函数和耦合不等式约束函数是非光滑凸函数的假设条件下,利用Moreau-Yosida函数正则化使目标函数和约束函数近似光滑可微.然后,根据强连通加权平衡有向图的分布式连续时间投影算法构造李雅普诺夫函数,证明该算法下的平衡解是分布式优化问题最优解,并对算法进行收敛性分析.最后,通过数值仿真验证算法的有效性.

关键词：多智能体网络分布式优化加权平衡有向图耦合不等式约束

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