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Tuning the porosity of {Co12IICo8III（μ3-OH）24（X）}11+ supramolecular frameworks by reaction time for D2/H2 separation

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Science China Chemistry 2025年

作者： Zhuozhou Xie Zhu Zhuo Zi-ang Nan Qing Li Xiufang Li Zi-Xiu Lu Linzhe Lü jin Liu Luyao Liu Wenjing Wang Wei Wang Daqiang Yuan You-Gui Huang State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of Chinese Academy of Sciences Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth Materials Haixi InstitutesChinese Academy of Sciences State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical EngineeringXiamen University

Systematicly tuning the porosities of porous materials is crucial for targeted gas mixture separation,yet it remains a longstanding *** a common strategy,altering the phenylene ring count in the organic building units has been exploited to adjust pore apertures in metal organic frameworks （MOFs） and covalent organic frameworks （COFs）,resulting in only a stepwise pore size variation of approximately 2.8?.Unlike MOFs and COFs,the porosities for supramolecular assembly frameworks are highly dependent on the packings of the molecular building units in the *** above strategy cannot be applied to supramolecular assembly frameworks and other strategies are required to adjust pore apertures in supramolecular frameworks,especially to achieve porous materials with the optimal pore size for D2/H2separation （～3?）.Here,we successfully modulate the porosity of supramolecular frameworks of[CoII1+12CoIII8L12（μ3-OH）24（X）]1clusters （L=mono-deprotonated 1-iminoisoindole-3-amine,X=ClO?4or Cl?） by controlling the duration of self-assembly *** simply adjusting the reaction time,we obtain three[CoII12CoIII8L12（μ3-OH）24（X）]11+supramolecular frameworks:[CoII12CoIII8（μ3-OH）24（ClO4）L12)]·（Cl）4·（HCO2）7（1）,[CoII12CoIII8L12（μ3-OH）24（Cl）]·（ClOI4）4·（Cl）6·（HCO2）·（H2O）10（2）,and[CoI12CoIII8L12（μ3-OH）24（Cl）]·（Cl）11·（H2O）12（3）.The different stacking patterns of the[CoII12CoIII8L12（μ3-OH）24（X）]11+clusters in these frameworks lead to significantly varied stabilities and *** 1 exhibits permanent porosity with interconnected channels and maintains stability under harsh *** contrast,compound 2 is nearly nonporous,and compound 3 becomes unstable upon *** pores of compound 1 show higher affinity to D2than H2,and the pore aperture diameter of compound 1 （～3.06?） meets the optimal porosity for D2/***,compound 1 demonstrates moderate D2/H2separation at 77 K (retention time:～7 min/g for D2/H2/Ne （10/10/80 vol%） in a flow of 5 mL

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基于耦合特征和改进随机森林的非侵入式农业负荷辨识

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供用电 2025年第1期42卷 106-115页

作者：刘俊雨白牧可张立梅河北农业大学信息科学与技术学院河北保定071000 中国电力科学研究院有限公司北京100192

随着高比例新能源和多元负荷的不断接入,配电网呈现出动态变化和交直流混合运行的特性,农业负荷类型的增加和负荷辨识问题对配电网智慧农业的实施提出了新挑战。提出了一种结合耦合特征和改进随机森林算法的非侵入式农业负荷辨识方法。... 详细信息

随着高比例新能源和多元负荷的不断接入,配电网呈现出动态变化和交直流混合运行的特性,农业负荷类型的增加和负荷辨识问题对配电网智慧农业的实施提出了新挑战。提出了一种结合耦合特征和改进随机森林算法的非侵入式农业负荷辨识方法。针对智慧农业当中负荷类型的多样性,分析了卷帘机、抽水泵、水平循环风扇等典型农业负荷的暂态特征与稳态特征,并结合农村分布式光伏发电数据,通过形态相似性分析提取了具有时间序列相关性的农业负荷耦合特征。基于历史负荷数据和特征,构造了样本矩阵作为随机森林算法的输入,并通过改进Bootstrap抽样、引入最优特征子集构造分类回归树(classification and regression tree,CART)决策树,以及基于负荷种类进行重复投票机制,构建了改进随机森林算法的农业负荷辨识架构。建立了准确率评价指标,通过仿真分析验证所提方法的有效性,并分析了关键参数对算法性能的影响。仿真结果表明,所提方法的准确率达到了98.96%,在辨识效率上相较其他算法有明显提升。

关键词：非侵入式农业负荷耦合特征形态相似随机森林

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Gaseous plume flows in space propulsion

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Chinese journal of Aeronautics 2013年第3期26卷 522-528页

作者： Wang limei Cai Chunpei Department of Mechanical and Aerospace Engineering New Mexico State University

This paper presents a gaskinetic study on high-speed, highly rarefied jets expanding into a vacuum from a cluster of planar or annular exits. Based on the corresponding exact expressions for a planar or annular jet, it is convenient to derive the combined multiple jet flowfield solutions of density and velocity components. For the combined temperature and pressure solutions, extra attention is needed. Several direct simulation Monte Carlo simulation results are provided to validate these analytical solutions. The analytical and numerical solutions are essentially identical for these high Knudsen number jet flows.

关键词： Free molecular flow Gasdynamics Gaskinetics jets Monte Carlo methods Plume flow

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Apples to oranges:environmentally derived,dynamic regulation of serotonin neuron subpopulations in adulthood?

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Neural Regeneration Research 2025年第9期20卷 2596-2597页

作者： Christopher j.O’Connell Matthew j.Robson Department of Genetics College of MedicineHarvard UniversityBostonMAUSA james L.Winkle College of Pharmacy Division of Pharmaceutical SciencesUniversity of CincinnatiCincinnatiOHUSA Neuroscience Graduate Program College of MedicineUniversity of CincinnatiCincinnatiOHUSA

Traumatic brain injury(TBI)is a public health problem with an undue economic burden that impacts nearly every age,ethnic,and gender group across the globe(Capizzi et al.,2020).TBIs are often sustained during a dynamic range of exposures to energetic environmental forces and as such outcomes are typically heterogeneous regarding severity and pathology(Capizzi et al.,2020).

关键词： sustained orange dynamic

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Broadband strong optical dichroism in topological Dirac semimetals with Fermi velocity anisotropy

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Chinese Physics B 2020年第7期29卷 128-134页

作者： j Lim K j A Ooi C Zhang L K ang Yee Sin ang Science Math and TechnologySingapore University of Technology and DesignSingapore School of Energy and Chemical Engineering Xiamen University MalaysiaSelangor Darul Ehsan 43900Malaysia College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005China School of Physics University of WollongongNorthfields AvenueNew South Wales 2522Australia

Prototypical three-dimensional(3D)topological Dirac semimetals(DSMs),such as Cd3As2 and Na3Bi,contain electrons that obey a linear momentum-energy dispersion with different Fermi velocities along the three orthogonal momentum *** being extensively studied in recent years,the inherent Fermi velocity anisotropy has often been neglected in the theoretical and numerical studies of 3D *** this omission does not qualitatively alter the physics of light-driven massless quasiparticles in 3D DSMs,it does quantitatively change the optical coefficients which can lead to nontrivial implications in terms of nanophotonics and plasmonics *** we study the linear optical response of 3D DSMs for general Fermi velocity values along each *** the signature conductivity-frequency scaling,σ(ω)∝ω,of 3D Dirac fermion is well-protected from the Fermi velocity anisotropy,the linear optical response exhibits strong linear dichroism as captured by the universal extinction ratio scaling law,Λi j=(vi/v j)^2(where i=j denotes the three spatial coordinates x,y,z,and vi is the i-direction Fermi velocity),which is independent of frequency,temperature,doping,and carrier scattering *** Cd3As2 and Na3Bi3,an exceptionally strong extinction ratio larger than 15 and covering a broad terahertz window is *** findings shed new light on the role of Fermi velocity anisotropy in the optical response of Dirac semimetals and open up novel polarization-sensitive functionalities,such as photodetection and light modulation.

关键词： topological Dirac semimetal optical anisotropy linear dichroismn linear response theory

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Sterilization of Escherichia coli cells by the application of pulsed magnetic field

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journal of Environmental Sciences 2004年第2期16卷 348-352页

作者： limei QUjiu-hui PENGYong-zhen ResearchCenterforEco-EnvironmentalSciences ChineseAcademyofSciencesBeijing100085China. SchoolofMunicipalandEnvironmentalEngineering HarbinInstituteofTechnologyHarbin150090China

The inactivation of microorganisms by pulsed magnetic field was studied. It was improved that the application of electromagnetic pulses evidently causes a lethal effect on E. coli cells suspended in phosphate buffer solution Na 2HPO 4/NaH 2PO 4(0 334/0 867 mmol/L). Experimental results indicated that the survivability(N/N 0; where N 0 and N are the number of cells survived per mill il iter before and after electromagnetic pulses application, respectively) of E. coli decreased with magnetic field intensity B and treatment time t. It was also found that the medium temperatures, the frequencies of pulse f, and the initial bacterial cell concentrations have determinate influences in destruction of E. coli cells by the application of magnetic pulses. The application of an magnetic intensity B=160 mT at pulses frequency f=62 kHz and treatment time t=16 h result in a considerable destruction levels of E. coli cells (N/N 0=10 -4 ). Possible mechanisms involved in sterilization of the magnetic field treatment were discussed. In order to shorten the treatment time, many groups of parallel inductive coil were used. The practicability test showed that the treatment time was shortened to 4 h with the application of three groups of parallel coil when the survivability of *** cells was less than 0 01%; and the power consumption was about 0 2 kWh /m 3.

关键词： Escherichia coli bacteria pulsed magnetic field induced current cell membrane

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Torsional wave in a circular micro-tube with clogging attached to the inner surface

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Acta Mechanica Solida Sinica 2017年第3期30卷 299-305页

作者： limei Xu Hui Fan Yufeng Zhou School of Astronautics and Aeronautics University of Electronic Science and Technology School of Mechanical and Aerospace Engineering Nanyang Technological University

In the present paper, we study the torsional wave propagation along a micro-tube with clog- ging attached to its inner surface. The clogging accumulated on the inner surface of the tube is modeled as an ＂elastic membrane＂ which is described by the so-called surface elasticity. A power-series solution is particularly developed for the lowest order of wave propagation. The dispersion diagram of the lowest-order wave is numerically presented with the surface （clogging） effect.

关键词： Torsional wave Wave propagation Surface effect Micro-tubes with clogging Elastic membrane

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Comparison Between Early and Late 21stC Phytoplankton Biomass and Dimethylsulfide Flux in the Subantarctic Southern Ocean

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journal of Ocean University of China 2020年第1期19卷 151-160页

作者： QU Bo Albert jGABRIC j.ang limei LI Chunyue School of Science Nantong UniversityNantong 226019China School of Environment and Science Griffith UniversityNathan Qld 4111Australia Nantong Chong Chuan School Nantong 226000China Marketing Thermo Fisher ScientificShanghai 201206China

Time-series of chlorophyll-a(CHL),a proxy for phytoplankton biomass,and various satellite-derived climate indicators are compared in a region of the Subantarctic Southern Ocean(40°-60°S,110°-140°E)for years *** reached a minimum in winter(june)and a maximum in late summer(early February).Zonal mean CHL decreased towards the *** sea surface temperature(SST)ranged between 8℃and 15℃and peaked in late *** and SST were positively correlated from March to june,negatively correlated from july to *** and wind speed(WIND)were negatively correlated with peak WIND occurred in *** direction(WIRD)was mostly in the southwest to westerly *** Antarctic Oscillation index(AAO)and CHL were negatively correlated(R=−0.58),indicating that as synoptic wind systems move southwards,CHL increases,and conversely when wind systems move northwards,CHL decreases.A genetic algorithm is used to calibrate the biogeochemical DMS model’s key *** 4×CO2(after year 2100)Regional mean SST increases 12%-17%,WIND increases 1.2ms−1,Cloud Cover increases 4.8%and mixed layer depth(MLD)decreases *** annual CHL increases 6.3%.The annual mean DMS flux increase 25.2%,increases 37%from day 1 to day 280 and decrease 3%from day 288 to day *** general increase of DMS flux under 4×CO2 conditions indicates the Subantarctic regional climate would be affected by changes in the DMS flux,with the potential for a cooling effect in the austral summer and autumn.

关键词： wind speed phytoplankton dimethylsulfide flux climate change subantarctic Southern Ocean

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数字经济、创新能力与经济高质量发展

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江苏商论 2025年第1期 22-27,36页

作者：臧守芳盐城师范学院数学与统计学院盐城数字经济研究院数字金融研究所江苏盐城224002

当前,中国经济已经由高速发展转向高质量发展,数字经济作为经济发展的新动能,正成为推动经济高质量发展的重要引擎。文章基于2011—2019年省级面板数据,通过构建综合评价指标体系,利用固定效应模型,从创新视角出发,探究数字经济影响高... 详细信息

当前,中国经济已经由高速发展转向高质量发展,数字经济作为经济发展的新动能,正成为推动经济高质量发展的重要引擎。文章基于2011—2019年省级面板数据,通过构建综合评价指标体系,利用固定效应模型,从创新视角出发,探究数字经济影响高质量发展的内在机制。结果表明,数字经济有效推动了经济高质量发展;创新能力在其中发挥了正向调节作用。这种影响作用存在区域异质性,中西部地区相较于东部地区更为明显。因此,文章提出了加强科技创新,持续推进数字产业化和产业数字化建设,施行差异化数字转型策略,并加强风险防范的建议。

关键词：创新能力数字经济高质量发展

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基于可达性与改进和声算法的高比例DG交直流配电网可靠性评估

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供用电 2025年第1期42卷 86-95页

作者：樊文婷白牧可刘敬敬张立梅河北农业大学信息科学与技术学院河北保定071000 中国电力科学研究院有限公司北京100192

高比例分布式电源(distributed generation,DG)与冲击负荷的接入及电力电子设备的广泛应用,使配电网动态、交直流共存特性更加明显,给配电网可靠性评估带来新的挑战。综合考虑负荷优先级和孤岛功率平衡,提出了基于可达性与改进和声算法... 详细信息

高比例分布式电源(distributed generation,DG)与冲击负荷的接入及电力电子设备的广泛应用,使配电网动态、交直流共存特性更加明显,给配电网可靠性评估带来新的挑战。综合考虑负荷优先级和孤岛功率平衡,提出了基于可达性与改进和声算法的配电网可靠性评估。以高比例DG交直流配电网孤岛划分特征分析为基础,基于可达性和并行随机广度优先及深度优先搜索算法生成由含单DG和多DG孤岛构成的候选解集。通过构建重要负荷恢复量最大和孤岛功率不平衡最小的多目标模型,采用改进和声算法优化求解孤岛的Pareto解集,并基于直觉模糊TOPSIS决策分析得到最优孤岛。在此基础上,考虑不确定性因素的影响,并结合高比例DG交直流配电网的特征,构建了含单DG孤岛、多DG孤岛的可靠性计算模型。以改进RBTS BUS6F4系统进行仿真,结果表明所建目标体现了重要负荷恢复量和孤岛功率不平衡量的折中,所提求解方法提高了孤岛划分效率,所提可靠性模型适用于含高比例DG的交直流配电网。

关键词：交直流配电网高比例分布式电源孤岛划分可靠性和声算法

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