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Discrete Boltzmann model with split collision for nonequilibrium reactive flows

Communications in Theoretical Physics 2024年第8期76卷 164-186页

作者： Chuandong Lin Kai H luo Huilin lai Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Energy and Power EngineeringTsinghua UniversityBeijing 100084China Department of Mechanical Engineering National University of Singapore10 Kent Ridge Crescent119260Singapore Department of Mechanical Engineering University College LondonTorrington PlaceLondon WC1E 7JEUnited Kingdom School of Mathematics and Statistics Key Laboratory of Analytical Mathematics and Applications(Ministry of Education)Fujian Key Laboratory of Analytical Mathematics and Applications(FJKLAMA)Center for Applied Mathematics of Fujian Province(FJNU)Fujian Normal University350117 FuzhouChina

A multi-relaxation-time discrete Boltzmann model(DBM) with split collision is proposed for both subsonic and supersonic compressible reacting flows, where chemical reactions take place among various components. The physical model is based on a unified set of discrete Boltzmann equations that describes the evolution of each chemical species with adjustable acceleration, specific heat ratio, and Prandtl number. On the right-hand side of discrete Boltzmann equations, the collision,force, and reaction terms denote the change rates of distribution functions due to self-and crosscollisions, external forces, and chemical reactions, respectively. The source terms can be calculated in three ways, among which the matrix inversion method possesses the highest physical accuracy and computational efficiency. Through Chapman-Enskog analysis, it is proved that the DBM is consistent with the reactive Navier-Stokes equations, Fick's law and the Stefan-Maxwell diffusion equation in the hydrodynamic limit. Compared with the one-step-relaxation model, the split collision model offers a detailed and precise description of hydrodynamic, thermodynamic, and chemical nonequilibrium effects. Finally, the model is validated by six benchmarks, including multicomponent diffusion, mixture in the force field, Kelvin-Helmholtz instability, flame at constant pressure, opposing chemical reaction, and steady detonation.

关键词： discrete Boltzmann method reactive flow detonation nonequilibrium effect

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健全全面从严治党体系:基本概念、内在要素与实践路径

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学习论坛 2025年第1期 25-32页

作者：罗星中国纪检监察学院党建教研部北京100877

全面从严治党体系是一个由诸多要素按照一定结构形成的复杂整体,是管党治党各领域各方面相互贯通、有机结合形成的体系。全面从严治党体系生成于中国共产党管党治党的具体实践中,具有理论基础深厚性、参与主体多元性、任务布局全面性、... 详细信息

全面从严治党体系是一个由诸多要素按照一定结构形成的复杂整体,是管党治党各领域各方面相互贯通、有机结合形成的体系。全面从严治党体系生成于中国共产党管党治党的具体实践中,具有理论基础深厚性、参与主体多元性、任务布局全面性、治理过程常态性、方法路径多样性的特点。新时代全面从严治党体系包含了组织体系、教育体系、监管体系、制度体系、责任体系五大部分。“五大体系”相互联系、有机贯通,明确了全面从严治党的基本内容、重点领域与内在逻辑。健全全面从严治党体系,要坚持和加强党的全面领导,持续深化党的建设制度改革,在铲除腐败滋生土壤和条件上下更大功夫,丰富全面从严治党体系的理念方法和工作机制,加强对全面从严治党体系的学理阐释。

关键词：全面从严治党体系监督责任党的领导

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大数据平台在市域治安风险防控中的设计与应用

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河南师范大学学报（自然科学版） 2025年第1期53卷 100-105,I0006页

作者：罗宁中国人民公安大学侦查学院北京100038 河南警察学院侦查系郑州450046

通过对大数据技术在市域治安风险防控应用中的现状与不足进行剖析,深度挖掘市域治安风险源头和应对方法.探讨了适用于市域治安风险防范的大数据平台设计的要素基础与设计基础,对市域治安风险防控大数据平台进行结构设计、流程设计和功... 详细信息

通过对大数据技术在市域治安风险防控应用中的现状与不足进行剖析,深度挖掘市域治安风险源头和应对方法.探讨了适用于市域治安风险防范的大数据平台设计的要素基础与设计基础,对市域治安风险防控大数据平台进行结构设计、流程设计和功能设计,给出了矛盾纠纷风险防控、平安校园风险防控、重点关注人员时空轨迹分析等功能的实现方法,深度分析了由矛盾纠纷引起刑事案的内在因素(变量)及各因素的特征.为大数据在市域治安风险防控中的应用提供支撑.

关键词：大数据治安风险防控平台设计

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Changes in Water Use Efficiency Caused by Climate Change,CO_(2) Fertilization,and Land Use Changes on the Tibetan Plateau

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Advances in Atmospheric Sciences 2023年第1期40卷 144-154页

作者： Binghao JIA Xin luo Longhuan WANG Xin lai State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD) Nanjing University of Information Science&TechnologyNanjing 210044China Key Lab of Virtual Geographic Environment(Nanjing Normal University) Ministry of EducationNanjing 210023China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023China Plateau Atmosphere and Environment Key Laboratory of Sichuan Province Chengdu University of Information TechnologyChengdu 610225China

Terrestrial ecosystem water use efficiency(WUE)is an important indicator for coupling plant photosynthesis and transpiration,and is also a key factor linking the carbon and water cycles between the land and ***,under the combination of climate change and human intervention,the change in WUE is still unclear,especially on the Tibetan Plateau(TP).Therefore,satellite remote sensing data and process-based terrestrial biosphere models(TBMs)are used in this study to investigate the spatiotemporal variations of WUE over the TP from 2001 to ***,the effects of land use and land cover change(LULCC)and CO_(2) fertilization on WUE from 1981-2010 are assessed using *** show that climate change is the leading contributor to the change in WUE on the TP,and temperature is the most important *** makes a negative contribution to WUE(-20.63%),which is greater than the positive contribution of CO_(2) fertilization(11.65%).In addition,CO_(2) fertilization can effectively improve ecosystem resilience on the *** the northwest plateau,the effects of LULCC and CO_(2) fertilization on WUE are more pronounced during the driest years than the annual *** findings can help researchers understand the response of WUE to climate change and human activity and the coupling of the carbon and water cycles over the TP.

关键词： water use efficiency gross primary productivity evapotranspiration Tibetan Plateau carbon and water cycle

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Natural and human-induced decline and spatio-temporal differentiation of terrestrial water storage over the Lancang-Mekong River Basin

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Journal of Geographical Sciences 2025年第1期35卷 112-138页

作者： CHEN Junxu WANG Yuan ZHAO Zhifang FAN Yunjiang luo Xiaochuan YI Lu FENG Siqi YANG Liang Emlyn Yunnan Key Laboratory of Soil Erosion Prevention and Green Development Yunnan University International Joint Research Center for Karstology Yunnan University School of Engineering Westlake University Department of Geography Ludwig Maximilian University of Munich (LMU)

Due to water conflicts and allocation in the Lancang-Mekong River Basin(LMRB), the spatio-temporal differentiation of total water resources and the natural-human influence need to be clarified. This work investigated LMRB's terrestrial water storage anomaly(TWSA) and its spatio-temporal dynamics during 2002–2020. Considering the effects of natural factors and human activities, the respective contributions of climate variability and human activities to terrestrial water storage change(TWSC) were separated. Results showed that:(1) LMRB's TWSA decreased by 0.3158 cm/a.(2) TWSA showed a gradual increase in distribution from southwest of MRB to middle LMRB and from northeast of LRB to middle LMRB. TWSA positively changed in Myanmar while slightly changed in Laos and China. It negatively changed in Vietnam, Thailand and Cambodia.(3) TWSA components decreased in a descending order of soil moisture, groundwater and precipitation.(4) Natural factors had a substantial and spatial differentiated influence on TWSA over the LMRB.(5) Climate variability contributed 79% of TWSC in the LMRB while human activities contributed 21% with an increasing impact after 2008. The TWSC of upstream basin countries was found to be controlled by climate variability while Vietnam and Cambodia's TWSC has been controlled by human activities since 2012.

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Green synthesis and enhanced photocatalytic activity of Ce-doped TiO2 nanoparticles supported on porous glass

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Particuology 2017年第5期15卷 103-109页

作者： chun Shen Kexia Pang Le Du Guangsheng luo Beijing Key Laboratory of Bioprocess College of Life Science and Technology Beijing University of Chemical Technology Beijing 100029 China State Key Laboratory of Chemical Resource Engineering Belting Key Laboratory of Membrane Science and Technology Beijing University of Chemical Technology Beijing 100029 China State Key Laboratory of Chemical Engineering Department of Chemical Engineering Tsinghua University Beijing 100084 China

A facile and green method to prepare Ce-doped TiO2 nanoparticles supported on porous glass beads is reported. An ion exchange process and subsequent calcination yielded Ce-doped TiO2 nanoparticles with a mean size of 4.8±0.3 nm. The nanoparticles were dispersed on the surface of porous glass beads. The addition of Ce enhanced the visible light absorption of the TiO2 nanoparticles in the 400-500 nm spectral window. The band gap of the as-prepared catalyst was 2.80 eV. The Ce-doped TiO2 nanoparticles immobilized on porous glass beads exhibited excellent photocatalytic activity for the visible-light-degradation of methyl orange （MO） and rhodamine B （RhB）; with rate constants of 0.095 and 0.230 min^-1 ; respectively. The effects of Ce dosage; reaction duration; and initial solution pH on the conversion of MO and RhB dyes were investigated. The green synthesis and favorable photocatalytic activity makes the Ce-doped TiO2 nanoparticles immobilized on porous glass an attractive alternative for the efficient degradation of organic pollutants.

关键词： Ce-doped TiO2 catalystSupported nanoparticlesPorous glass beadsPhotocatalytic degradation

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Size variation of the end Permian conodont Neogondolella at Meishan Section,Changxing,Zhejiang and its significance

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Science China Earth Sciences 2006年第4期49卷 337-347页

作者： luo Genming lai Xulong JIANG Haishui ZHANG Kexin Faculty of Earth Sciences China University of Geosciences Wuhan 430074 China Faculty of Earth Sciences China University of Geosciences Wuhan 430074 China Faculty of Earth Sciences China University of Geosciences Wuhan 430074 China Faculty of Earth Sciences China University of Geosciences Wuhan 430074 China

This study is based on both a generic and species level investigation of the individual size of the latest Permian conodont Neogondolella Pa elements collected from Meishan Section A, Changxing, Zhejiang Province. In this study, an obvious size reduction of Neogondolella Pa elements within bed 24e of the upper Changxing Limestone is recognized. The size variation of the Neogon- dolella occurs simultaneously with some important events including the negative shift of δ 13C, change in the ratio of the abundance of cyanobacterial biomarkers versus that of other general bacterial biomarkers and the shallowing of the sea water. Through the investigation of the paleoenvironmental changes and the analysis of the paleoecology of the conodont genus Neogondolella, the authors propose that the major factors for the size reduction of species of the conodont genus Neogondolella are food shortages caused by the mass extinction, the shallowing of the sea water as well as the in- crease in opacity of the sea water during the end Permian. The same phenomenon of Neogondolella size reduction is also observed in preliminary research from the same horizon at Shangsi Section, Sichuan Province. All the evidence suggests that there was a mass extinction that occurred at the horizon of bed 24e, and the evidence supports the viewpoint of a multi-phase mass extinction during the Permian and Triassic transition in South China.

关键词： Meishan Section, end Permian, conodont, Neogondolella, size reduction.

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Impacts of Nutlin-3a and exercise on murine double minute 2-enriched glioma treatment

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Neural Regeneration Research 2025年第4期20卷 1135-1152页

作者： Yisheng Chen Zhongcheng Fan Zhiwen luo Xueran Kang Renwen Wan Fangqi Li Weiwei Lin Zhihua Han Beijie Qi Jinrong Lin Yaying Sun Jiebin Huang Yuzhen Xu Shiyi Chen Department of Sport Medicine Huashan HospitalFudan UniversityShanghaiChina Department of Orthopedic Surgery Hainan Province Clinical Medical CenterHaikou Affiliated Hospital of Central South University Xiangya School of MedicineHaikouHainan ProvinceChina Department of Basic Medicine Shanghai Jiao Tong University School of MedicineShanghai Jiao Tong UniversityShanghaiChina Department of Neurosurgery Second Affiliated Hospital of Zhejiang University School of MedicineZhejiang UniversityHangzhouZhejiang ProvinceChina Department of Orthopedics Shanghai General HospitalSchool of Medicine Shanghai Jiao Tong UniversityShanghaiChina Department of Infectious Diseases Children’s Hospital of Fudan UniversityNational Children’s Medical CenterShanghaiChina Department of Rehabilitation The Second Affiliated Hospital of Shandong First Medical UniversityTaianShandong ProvinceChina

Recent research has demonstrated the impact of physical activity on the prognosis of glioma patients,with evidence suggesting exercise may reduce mortality risks and aid neural *** role of the small ubiquitin-like modifier(SUMO)protein,especially post-exercise,in cancer progression,is gaining attention,as are the potential anti-cancer effects of *** used machine learning to create the exercise and SUMO-related gene signature(ESLRS).This signature shows how physical activity might help improve the outlook for low-grade glioma and other *** demonstrated the prognostic and immunotherapeutic significance of ESLRS markers,specifically highlighting how murine double minute 2(MDM2),a component of the ESLRS,can be targeted by *** underscores the intricate relationship between natural compounds such as nutlin-3 and immune *** comprehensive CRISPR screening,we validated the effects of specific ESLRS genes on low-grade glioma *** also revealed insights into the effectiveness of Nutlin-3a as a potent MDM2 inhibitor through molecular docking and dynamic ***-3a inhibited glioma cell proliferation and activated the p53 *** efficacy decreased with MDM2 overexpression,and this was reversed by Nutlin-3a or *** using a low-grade glioma mouse model highlighted the effect of physical activity on oxidative stress and molecular pathway ***,both physical exercise and Nutlin-3a administration improved physical function in mice bearing tumors derived from MDM2-overexpressing *** results suggest the potential for Nutlin-3a,an MDM2 inhibitor,with physical exercise as a therapeutic approach for glioma *** research also supports the use of natural products for therapy and sheds light on the interaction of exercise,natural products,and immune regulation in cancer treatment.

关键词： exercise and SUMO-related gene signatures(ESLRS) glioblastoma management low-grade glioma natural bioactives neural regeneration physical exercise

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Collective stochastic resonance behaviors of two coupled harmonic oscillators driven by dichotomous fluctuating frequency

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Chinese Physics B 2021年第6期30卷 176-187页

作者： Lei Jiang Li lai Tao Yu Maokang luo College of Mathematics Sichuan UniversityChengdu 610064China College of Aeronautics and Astronautics Sichuan UniversityChengdu 610064China

The collective behaviors of two coupled harmonic oscillators with dichotomous fluctuating frequency are investigated,including stability, synchronization, and stochastic resonance(SR). First, the synchronization condition of the system is obtained. When this condition is satisfied, the mean-field behavior is consistent with any single particle behavior in the system. On this basis, the stability condition and the exact steady-state solution of the system are derived. Comparative analysis shows that, the stability condition is stronger than the synchronization condition, that is to say, when the stability condition is satisfied, the system is both synchronous and stable. Simulation analysis indicates that increasing the coupling strength will reduce the synchronization time. In weak coupling region, there is an optimal coupling strength that maximizes the output amplitude gain(OAG), thus the coupling-induced SR behavior occurs. In strong coupling region, the two particles are bounded as a whole, so that the coupling effect gradually disappears.

关键词： coupled harmonic oscillators dichotomous fluctuating frequency synchronization stability stochastic resonance

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Dramatical enhancement of circular dichroism in chiral hybrid perovskites via carboxylic hydrogen bond engineering

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Science China Chemistry 2025年

作者： Hang Li Xinling Li Peng Wang Tingting Zhu Ruiqing Li Huang Ye Yaru Geng Hongliang Dai Junhua luo State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of Chinese Academy of Sciences Fujian College University of Chinese Academy of Sciences College of Chemistry Fuzhou University College of Chemistry and Materials Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of EducationJiangxi Normal University

Chiral hybrid perovskites （CHPs） have been regarded as promising candidates for developing chiroptoelectronics ***,circular dichroism （CD）,as one of the most important characteristics to evaluate the chiroptical activity,remains at a comparatively low level in CHPs compared to other chiral materials,which hinders the successful applications of CHPs in stateof-the-art ***,exploring new methods for enhancing CD in CHPs is urgently needed and remains ***,enhanced CD response has been successfully realized via constructing carboxylic hydrogen bonding in chiralachiral mixed cations perovskites （R/S-PPA）2（ABA）PbBr5（2R/2S）(PPA=1-phenylpropylamine,ABA=4-aminobutyric acid).Compared with the prototype （R/S-PPA）PbBr3（1R/1S）,2R/2S provide intimate connections between organic units and inorganic parts via carboxylic hydrogen bonding N–H···O bridge,contributing new chirality transfer paths.A larger inorganic skeletons’helicity in 2R/2S predicts a high degree of chirality ***,2R/2S exhibit significantly enhanced CD response with an anisotropy factor amplified by an order of ***,bright blue circularly polarized luminescence applications are achieved in 2R/*** work systematically investigates the correlation between CD and hydrogen bonding interaction in CHPs,meanwhile providing a new avenue to develop the application potential of chiral materials in chiroptoelectronics.

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