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CSEE Journal of Power and Energy Systems 2024年第1期10卷 351-360页

作者： Xianglong Lian Tong Qian Zepeng Li Xingyu chen Wenhu Tang Q.h.Wu School of Electric Power Engineering South China University of TechnologyGuangzhou 510640China

In power systems,failures of vulnerable lines can trigger large-scale cascading failures,and vulnerability assessment is dedicated to locating these lines and reducing the risks of such *** on a structure and attribute network embedding(SANE)algorithm,a novel quantitative vulnerability analysis method is proposed to identify vulnerable lines in this ***,a two-layered random walk network with topological and electrical properties of transmission lines is ***,based on the weighted degree of nodes in the two-layered network,the inter-layer and intra-layer walking transition probabilities are developed to obtain walk ***,a Word2Vec algorithm is applied to obtain lowdimension vectors representing transmission lines,according to obtained walk sequences for calculating the vulnerability index of transmissions ***,the proposed method is compared with three widely used methods in two test *** show the network embedding based method is superior to those comparison methods and can provide guidance for identifying vulnerable lines.

关键词： Network embedding random walk transmission lines vulnerability assessment

Cascade Catalysts Based on Colloidal Engineering

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CCS Chemistry 2024年第9期6卷 2150-2161页

作者： chen chen Chin Ken Wong hui chen Nicole Janoszka Giada Quintieri Andréh.Gröschel School of Chemistry and Chemical Engineering Shanghai Jiao Tong University200240 Shanghai School of Chemistry University of New South Wales(UNSW)SydneySydney NSW 2052 Physical Chemistry and Center for Soft Nanoscience University of MünsterCorrensstraße 28-3048149 Münster

We see significant progress in the preparation of nanoreactors that host incompatible catalysts for cascade reactions,yet their preparation typically requires specialized,multistep synthetic ***,we utilize core-satellite microparticles as a versatile strategy for the site isolation of catalysts in core and *** core-satellite clusters are prepared by mixing specific amounts of negatively charged core microparticles(e.g.,acid catalyst)with positively charged satellites(e.g.,base catalyst).Core and satellite are made from incompatible polymers allowing solvent-annealing of clusters into different morphologies(raspberry,patchy,and core-shell)while maintaining site isolation of the *** core-satellite microparticles show very good catalytic activity in a model one-pot acid/base cascade reaction with subtle differences regarding particle *** microparticles thereby demonstrated the highest reaction rate and yield,likely due to an alleviated diffusion pathway for the ***,we show that this colloidal engineering strategy can be extended to multifunctional microparticles suitable to perform multistep cascade reactions in one pot.

关键词： cascade catalysts compartmentalization colloidal engineering emulsion polymerization multifunctional particles

An Upper Bound for the Transversal Number of Connected k-Uniform hypergraphs

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Journal of the Operations Research Society of China 2024年第3期12卷 829-835页

作者： Zi-An chen Bin chen Center for Discrete mathematics Fuzhou UniversityFuzhou350108FujianChina

Let h be a hypergraph with vertex set V(h)and hyperedge set E(h).We call a vertex set R ■V(h)a transversal if it has a nonempty intersection with every hyperedge of *** transversal number,denoted by τ(h),is the minimum cardinality of *** 2021,Diao verified that the upper bound of transversal number for any connected 3-uniform hypergraph h is at most 2m+1/3,that is,τ(h)≤2m+1/3, where m is the size of ***,they gave the necessary and sufficient conditions to reachthe upper bound,namely τ(h)≤2m+1/3,if and only if h is a hypertreewitha 3 perfect *** this paper,we investigate the transversal number of connected kunifom hypergraphs for k≥*** confrm that τ(h)≤(k-1)m+1/k for any k-unifom hypegraphh with size ***,we show that τ(h)≤(k-1)m+1/k if and only if h is a hypertree with a perfect matching,which generalizes the results of Diao.

关键词： Transversal number k-uniform hypergraph Perfect matching

Ultrafast magneto-optical dynamics in nickel(111)single crystal studied by the integration of ultrafast reflectivity and polarimetry probes

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Chinese Physics B 2024年第3期33卷 65-69页

作者：匡皓余军潇陈洁 h.E.Elsayed-Ali 李润泽 Peter m.Rentzepis School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Center for Transformative Science ShanghaiTech UniversityShanghai 201210China Center for Ultrafast Science and Technology Key Laboratory for Laser Plasmas (Ministry of Education)Collaborative Innovation Center of IFSA (CICIFSA)School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Department of Electrical and Computer Engineering Old Dominion UniversityNorfolkVirginia 23529USA Department of Electrical and Computer Engineering Texas A&M UniversityCollege StationTexas 77843USA

With the integration of ultrafast reflectivity and polarimetry probes,we observed carrier relaxation and spin dynamics induced by ultrafast laser excitation of Ni(111)single *** carrier relaxation time within the linear excitation range reveals that electron-phonon coupling and dissipation of photon energy into the bulk of the crystal take tens of *** the other hand,the observed spin dynamics indicate a longer time of about 120 *** further understand how the lattice degree of freedom is coupled with these dynamics may require the integration of an ultrafast diffraction probe.

关键词： ultrafast spin dynamics non-equilibrium dynamics multi-probe

ALS-linked C9orf72 dipeptide repeats inhibit starvation-induced autophagy through modulating BCL2–BECN1 interaction

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Acta Pharmaceutica Sinica B 2024年第5期14卷 2026-2038页

作者： Shiqiang Xu Qilian ma Junwen Shen Ningning Li Shan Sun Nana Wang Yang chen Chunsheng Dong Kin Yip Tam Jochen h.m.Prehn hongfeng Wang Zheng Ying Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences Soochow UniversitySuzhou 215123China mOE Key Laboratory of Geriatric Diseases and Immunology College of Pharmaceutical SciencesSuzhou Medical College of Soochow UniversitySuzhou 215123China Jiangsu Province Engineering Research Center of Precision Diagnostics and Therapeutics Development Soochow UniversitySuzhou 215123China Dept.of Physiology&medical Physics and FUTURE-NEURO Research Centre Royal College of Surgeons in IrelandDublin D02 YN77Ireland Faculty of health Sciences University of MacaoTaipaMacao 999078China Insititutes of Biology and medical Science Soochow UniversitySuzhou 215123China

Growing evidences indicate that dysfunction of autophagy contributes to the disease pathogenesis of amyotrophic lateral sclerosis(ALS)and frontotemporal dementia(FTD),two neurodegenerative *** GGGGCC·GGCCCC repeat RNA expansion in chromosome 9 open reading frame 72(C9orf72)is the most genetic cause of both ALS and *** to the previous studies,GGGGCC·GGCCCC repeat undergoes the unconventional repeat-associated non-ATG translation,which produces dipeptide repeat(DPR)*** there is a growing understanding that C9orf72 DPRs have a strong ability to harm neurons and induce C9orf72-linked ALS/FTD,whether these DPRs can affect autophagy remains *** the present study,we find that poly-GR and poly-PR,two arginine-containing DPRs which display the most cytotoxic properties according to the previous studies,strongly inhibit starvation-induced ***,our data indicate that arginine-rich DPRs enhance the interaction between BCL2 and BECN1/Beclin 1 by inhibiting BCL2 phosphorylation,therefore they can impair autophagic clearance of neurodegenerative disease-associated protein aggregates under starvation condition in ***,our study not only highlights the role of C9orf72 DPR in autophagy dysfunction,but also provides novel insight that pharmacological intervention of autophagy using SW063058,a small molecule compound that can disrupt the interaction between BECN1 and BCL2,may reduce C9orf72 DPR-induced neurotoxicity.

关键词： Amyotrophic lateral sclerosis Frontotemporal dementia C9orf72 Autophagy BCL2 BECN1/Beclin 1 Dipeptide repeat Neurodegeneration

Siliceous mesocellular foam supported Cu catalysts for promoting non-thermal plasma activated CO_(2) hydrogenation toward methanol synthesis

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Frontiers of Chemical Science and Engineering 2024年第7期18卷 55-65页

作者： Yi chen Shaowei chen Yan Shao Cui Quan Ningbo Gao Xiaolei Fan huanhao chen State Key Laboratory of materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China School of Environmental Science and Engineering Nanjing Tech UniversityNanjing 211816China School of Energy and Power Engineering Xi’an Jiaotong UniversityXi’an 710049China Department of Chemical Engineering School of EngineeringThe University of ManchesterManchester M139PLUK Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute University of Nottingham Ningbo ChinaNingbo 315048China Institute of Wenzhou Zhejiang UniversityWenzhou 325006China

Electrified non-thermal plasma (NTP) catalytic hydrogenation is the promising alternative to the thermal counterparts, being able to be operated under mild conditions and compatible with green electricity/hydrogen. Rational design of the catalysts for such NTP-catalytic systems is one of the keys to improve the process efficiency. here, we present the development of siliceous mesocellular foam (mCF) supported Cu catalysts for NTP-catalytic CO_(2) hydrogenation to methanol. The findings show that the pristine mCF support with high specific surface area and large mesopore of 784 m2·g−1 and ~8.5 nm could promote the plasma discharging and the diffusion of species through its framework, outperforming other control porous materials (viz., silicalite-1, SiO_(2), and SBA-15). Compared to the NTP system employing the bare mCF, the inclusion of Cu and Zn in mCF (i.e., Cu1Zn1/mCF) promoted the methanol formation of the NTP-catalytic system with a higher space-time yield of methanol at ~275 μmol·g_(cat)^(−1)·h^(−1) and a lower energy consumption of 26.4 kJ^(−1)·mmol_(Ch_(3)Oh)^(-1) (conversely, ~225 μmol·g_(cat)^(−1)·h^(−1) and ~71 kJ^(−1)·mmol_(Ch_(3)Oh)^(-1), respectively, for the bare mCF system at 10.1 kV). The findings suggest that inclusion of active metal sites (especially Zn species) could stabilize the CO_(2)/CO-related intermediates to facilitate the surface reaction toward methanol formation.

关键词： non-thermal plasma(NTP)catalysis Cu catalyst CO_(2)hydrogenation methanol siliceous mesocellular foam(mCF)

Nano-enhanced solid-state hydrogen storage:Balancing discovery and pragmatism for future energy solutions

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Nano Research 2024年第10期17卷 8729-8753页

作者： Chaochao Dun Xinyi Wang Linfeng chen Sichi Li hanna m.Breunig Jeffrey J.Urban The molecular Foundry Lawrence Berkeley National Laboratory BerkeleyBerkeleyCA 94720USA Energy Analysis and Environmental Impacts Division Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA Lawrence Livermore National Laboratory LivermoreCA 94550USA

Nanomaterials have revolutionized the battery industry by enhancing energy storage capacities and charging speeds,and their application in hydrogen(h_(2))storage likewise holds strong potential,though with distinct challenges and mechanisms.h_(2) is a crucial future zero-carbon energy vector given its high gravimetric energy density,which far exceeds that of liquid ***,its low volumetric energy density in gaseous form currently requires storage under high pressure or at low *** review critically examines the current and prospective landscapes of solid-state h_(2) storage technologies,with a focus on pragmatic integration of advanced materials such as metal-organic frameworks(mOFs),magnesium-based hybrids,and novel sorbents into future energy *** materials,enhanced by nanotechnology,could significantly improve the efficiency and capacity of h_(2) storage systems by optimizing h_(2) adsorption at the nanoscale and improving the kinetics of h_(2) uptake and *** discuss various h_(2) storage mechanisms—physisorption,chemisorption,and the Kubas interaction—analyzing their impact on the energy efficiency and scalability of storage *** review also addresses the potential of“smart mOFs”,single-atom catalyst-doped metal hydrides,mXenes and entropy-driven alloys to enhance the performance and broaden the application range of h_(2) storage systems,stressing the need for innovative materials and system integration to satisfy future energy ***-throughput screening,combined with machine learning algorithms,is noted as a promising approach to identify patterns and predict the behavior of novel materials under various conditions,significantly reducing the time and cost associated with experimental *** closing,we discuss the increasing involvement of various companies in solid-state h_(2) storage,particularly in prototype vehicles,from a techno-economic *** forward-looking perspective underscores t

关键词： nanomaterials nanotechnology solid-state h_(2)storage techno-economic analysis model-driven material development processes

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甘肃省熊蜂分布特征及其影响因素

中国蜂业 2024年第8期15卷 13-13页

作者：安建东 naeem.m.chen h Li W hughes AC Williams Ph Bashir Nh miao Z huang J An J 中国农业科学院蜜蜂研究所

近日，中国农业科学院蜜蜂研究所联合曲靖师范学院等单位科研人员发现甘肃省熊蜂呈现四大生物地理区系，净初级生产力是影响熊蜂多样性分布的最主要因素。该研究成果在线发表在《昆虫(Insects)》上。熊蜂是众多植物的传粉者，在陆地生... 详细信息

近日，中国农业科学院蜜蜂研究所联合曲靖师范学院等单位科研人员发现甘肃省熊蜂呈现四大生物地理区系，净初级生产力是影响熊蜂多样性分布的最主要因素。该研究成果在线发表在《昆虫(Insects)》上。熊蜂是众多植物的传粉者，在陆地生态系统中发挥着十分重要的作用。明确影响熊蜂分布的因素对于熊蜂多样性保护至关重要。

关键词： Gansu biodiversity biogeographic regionalization bumblebees canonical correspondence analysis

Effects of the properties of mg(Oh)_(2)precursor on the hydrothermal synthesis of magnesium oxysulfate whiskers

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Particuology 2024年第9期92卷 13-23页

作者： Thanayos Boonrit mei Yang Guangwen chen Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian116023China University of Chinese Academy of Sciences Beijing100049China

magnesium oxysulfate(mOS)whiskers are commonly synthesized through a dissolution-precipitation mechanism,wherein mg(Oh)_(2)dissolves to form mg(Oh)64−,followed by reactions with SO_(4)^(2−)and h_(2)O to yield mOS ***,the impact of mg(Oh)_(2)precursor properties on the formation process of mOS whiskers has been insufficiently explored,and sector-like and needle-like morphologies were both observed in previous *** this study,we systematically investigated how the properties of mg(Oh)_(2)precursors influenced the crystalline structure and morphology of mOS *** various experimental conditions,mgSO_(4)·5mg(Oh)_(2)·2h_(2)O(152mOS)whiskers were consistently obtained,regardless of mg(Oh)_(2)morphology and *** size of mg(Oh)_(2)emerged as a critical factor in shaping the morphology of 152mOS ***-sized mg(Oh)_(2)(≤106±37 nm)favored the formation of sector-like whiskers,while larger-sized mg(Oh)_(2)(≥206±98 nm)encouraged the development of needle-like *** distinction was attributed to the slower dissolution rate exhibited by larger-sized mg(Oh)_(2),maintaining a smaller number of 152mOS nuclei and promoting the growth of needle-like whiskers instead of the aggregation of 152mOS nuclei into sector-like *** addition,the effects of the molar ratio of mg^(2+)to SO_(4)^(2−)and hydrothermal temperature were also *** average length and diameter of the needle-like whiskers prepared with mg(Oh)_(2)of 331±145 nm under optimized conditions were 77±32 and 0.39±0.10μm,*** study presented an effective strategy for controlling the morphology of 152mOS whiskers.

关键词： magnesium oxysulfate whiskers morphology control Precursor microreactor

Activating Ru in the pyramidal sites of Ru_(2)P-type structures with earth-abundant transition metals for achieving extremely high hER activity while minimizing noble metal content

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Carbon Energy 2024年第9期6卷 80-92页

作者： Sayed m.El-Refaei Patrícia A.Russo Thorsten Schultz Zhe-Ning chen Patrick Amsalem Norbert Koch Nicola Pinna Department of Chemistry and the Center for the Science of materials Berlin Humboldt-Universität zu BerlinBerlinGermany max-Planck-Institut für Chemische Energiekonversion Mülheim an der RuhrGermany Institut für Physik and Center for the Science of materials Berlin Humboldt-Universität zu BerlinBerlinGermany helmholtz-Zentrum Berlin für materialien und Energie Gmbh BerlinGermany State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouChina

Rational design of efficient ph-universal hydrogen evolution reaction catalysts to enable large-scale hydrogen production via electrochemical water splitting is of great significance,yet a challenging ***,Ru atoms in the Ru_(2)P structure were replaced with m=Co,Ni,or mo to produce m_(2-x)Ru_(x)P *** metals show strong site preference,with Co and Ni occupying the tetrahedral sites and Ru the square pyramidal sites of the CoRuP and NiRuP Ru_(2)P-type *** presence of Co or Ni in the tetrahedral sites leads to charge redistribution for Ru and,according to density functional theory calculations,a significant increase in the Ru d-band *** a result,the intrinsic activity of CoRuP and NiRuP increases considerably compared to Ru_(2)P in both acidic and alkaline *** effect is not observed for moRuP,in which mo prefers to occupy the pyramidal *** particular,CoRuP shows state-of-the-art activity,outperforming Ru_(2)P with Pt-like activity in 0.5 m h_(2)SO_(4)(η10=12.3 mV;η100=52 mV;turnover frequency(TOF)=4.7 s^(-1)).It remains extraordinarily active in alkaline conditions(η10=12.9 mV;η100=43.5 mV)with a TOF of 4.5 s^(-1),which is 4x higher than that of Ru_(2)P and 10x that of Pt/*** increase in the Co content does not lead to drastic loss of activity,especially in alkaline medium,where,for example,the TOF of Co_(1.9)Ru_(0.1)P remains comparable to that of Ru_(2)P and higher than that of Pt/C,highlighting the viability of the adopted approach to prepare cost-efficient catalysts.

关键词： electrocatalysis ruthenium phosphide transition metal phosphonates