检索结果-南通市图书馆

A Novel ISSA–DELM Model for Predicting Rock Mass Permeability

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2024年第9期140卷 2825-2848页

作者： Chen Xing Leihua yao y.ngdong Wang School of Engineering and Technology China University of Geosciences(Beijing)Beijing100083China Beijing Engineering Corporation Limited Beijing100024China

In pumped storage projects,the permeability.of rock masses is a crucial parameter in engineering design and *** rock mass permeability.coefficient(K)is influenced by.various geological parameters,and previous studies aimed to establish an accurate relationship between K and geological *** study.uses the improved sparrow search algorithm(ISSA)to optimize the parameter settings of the deep extreme learning machine(DELM),constructing a prediction model with flexible parameter selection and high ***,the Spearman method is applied to analy.e the correlation between geological parameters.A sample database is built by.comprehensively.selecting four geological indexes:burial depth,rock quality.designation(RQD),fracture density.characteristic index(FD),and rock mass integrity.designation(RID).Hence,the defects of the sparrow search algorithm(SSA)are enhanced using the improved strategy.and the initial input weights of the DELM are ***,the proposed ISSA–DELM model is employ.d to predict the permeability.coefficient of rock mass in the entire study.*** results showed that the predictive performance of the model is superior to that of the DELM and SSA–***,this model successfully.provides insights into the distribution characteristics of rock mass permeability.at engineering sites.

关键词： ISSA DELM rock mass permeability.coefficient geological parameter correlation analy.is

Restoring cosmological concordance with axion-like early.dark energy.and dark matter characterized by.a constant equation of state?

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Phy.ics 2024年第7期76卷 74-82页

作者： y.n-Hong yao Xin-He Meng School of Phy.ics and Astronomy Sun Yatsen University 2 Daxue RoadTangjiaZhuhaiChina School of Phy.ics Nankai University 94 Weijin RoadNankaiTianjinChina

The Hubble tension persists as a challenge in *** early.dark energy.EDE)models,initially.considered the most promising for alleviating the Hubble tension,fall short of addressing the issue without exacerbating other tensions,such as the S_(8)*** that a negative dark matter(DM)equation of state(EoS)parameter is conducive to reduce the value of the σ_(8)parameter,we extend the axion-like EDE model in this paper by.replacing the cold dark matter(CDM)with DM characterized by.a constant EoS w_(dm)(referred to as WDM hereafter).We then impose constraints on this axion-like EDE extension model,along with three other models:the axion-like EDE model,ΛWDM,and Λ*** constraints are derived from a comprehensive analy.is incorporating data from the Planck 2018 cosmic microwave background,bary.n acoustic oscillations,and the Pantheon compilation,as well as a prior on H_(0)(i.e.H_(0)=73.04±1.04,based on the latest local measurement by.Riess et al)and a Gaussianized prior on S_(8)(i.e.S_(8)=0.766±0.017,determined through the joint analy.is of KID1000+BOSS+2dLenS).We find that although the new model maintains the ability.to alleviate the Hubble tension to~1.4σ,it still exacerbates the S_(8)tension to a level similar to that of the axion-like EDE model.

关键词： Hubble tension early.dark energy noncold dark matter S8 tension

Exponential Sy.chronization of Delay.d Stochastic Complex Dy.amical Networks via Hy.rid Impulsive Control

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 785-787页

作者： yao Cui Pei Cheng Xiaohua Ge the School of Mathematic Science Anhui UniversityHefei 230601China IEEE the School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyMelbourne VIC 3122Australia

Dear Editor,This letter addresses the sy.chronization problem of a class of delay.d stochastic complex dy.amical networks consisting of multiple drive and response *** aim is to achieve mean square exponential sy.chronization for the drive-response nodes despite the simultaneous presence of time delay. and stochastic noises in node dy.amics.

关键词： dy.amics stochastic letter

Traditional Chinese medicine for the treatment of immune-related nephropathy.A review

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2024年第1期14卷 38-66页

作者： Pu Jiang Changliang yao De-an Guo School of Pharmacy Nanjing University of Chinese MedicineNanjing 210023China Shanghai Research Center for Modernization of Traditional Chinese Medicine National Engineering Research Center of TCM Standardization TechnologyShanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China

Immune-related nephropathy.IRN)refers to immune-response-mediated glomerulonephritis and is the main cause of end-stage renal *** pathogenesis of IRN is not fully.understood;therefore,treatment is *** Chinese medicines(TCMs)have potent clinical effects in the treatment of the IRN conditions immunoglobulin A nephropathy.lupus nephropathy.and diabetic *** underly.ng mechanisms mainly.include its inhibition of inflammation;improvements to renal interstitial fibrosis,oxidative stress,autophagy.apoptosis;and regulation of *** this review,we summarize the clinical sy.ptoms of the three IRN subty.es and the use of TCM prescriptions,herbs,and bioactive compounds in treating IRN,as well as the potential mechanisms,intending to provide a reference for the future study.of TCM as IRN treatments.

关键词： IgA nephropathy Diabetic nephropathy Lupus nephritis Traditional Chinese medicine Immunity Pathogenesis Mechanism Pathophy.iology

Cry.tallization management of CsPbI2Br perovskites by.PbAc2-incorporated twice spin-coating process for efficient and stable CsPbI2Br perovskite solar cells

在线全文

学校读者我要写书评

暂无评论

Journal of Energy.Chemistry 2024年第10期97卷 419-428页

作者： y. Liu Kun Lang Huifang Han Huijing Liu yao Fu Pengchen Zou y.nhui Ly. Jia Xu Jianxi yao State Key.Laboratory.of Alternate Electrical Power Sy.tem with Renewable Energy.Sources Beijing Key Laboratory of Energy Safety and Clean Utilization North China Electric Power University

CsPbI2Br perovskite solar cell has been extensively.studied due to its exceptional thermal stability.and relatively.stable perovskite phase ***,the presence of bromine leads to a rapid cry.tallization rate of CsPbI2Br films,resulting in small grain size and high defect ***,CsPbI2Br demonstrates poor light absorption due to its wide ***,it is crucial to control the cry.tallization rate and increase the film thickness to reduce defect density.enhance light absorption,and improve photovoltaic *** this study.we utilized a PbAc2-incorporated twice spincoating（PTS） process to address these ***,PbAc2was added to the CsPbI2Br precursor solution to form a CsPbI2Br film,which was then coated with the CsPbI2Br precursor solution to produce the PTS film,Ac-can delay.the perovskite cry.tallization,leading to the formation of thicker and denser CsPbI2Br ***,lone-pair electrons of the oxy.en atom provided by.Ac-formed coordination bonds with under-coordinated Pb2+ions to fill halogen ion vacancies,thereby.reducing the defect ***,the PTS CsPbI2Br device achieved a peak power conversion efficiency.PCE） of 16.19% and maintained 96.7% of its initial PCE over 1500 h at room temperature under 25% relative humidity.without any.encapsulation.

关键词： Cry.tallization management CsPbI2Br PbAc2 Perovskite solar cells Twice spin-coating process

Co-py.oly.is of Sewage Sludge with Paint Sludge: Kinetics and Thermody.amic Analy.is via Iso-conversional Methods

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University.of Technology.Materials Science) 2024年第3期39卷 716-727页

作者：周尚群赵青林 y. Tian yao Xiaojie State Key.Laboratory.of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China School of Mate-rials Science and Engineering Wuhan University of TechnologyWuhan 430070China

This study.explored the sy.ergistic interaction of sewage sludge(SS)and automotive paint sludge(PS)during co-py.oly.is for the optimized treatment of sewage sludge in cement kiln sy.tems,utilizing thermogravimetric analy.is(TGA)and thermogravimetric-mass spectrometry.TGA-MS).The result reveals the coexisting sy.ergistic and antagonistic effects in the co-py.oly.is of SS/*** sy.ergistic effect arises from hy.rogen free radicals in SS and cataly.ic components in PS,while the main source of the antagonistic effect is that,during the mechanical mixing process,the SS/PS is converted from the particulate form into a dough-like rubbery.which contributes to the film-forming effect,hindering the volatilization of volatile ***/PS co-py.oly.is reduces the y.elding of tar production while increasing coke and *** study.will provide some in-depth insights into the co-py.oly.is of SS/PS,and offer theoretical support for the subsequent research on the collaborative disposal processes in cement kilns.

关键词： sewage sludge co-py.oly.is automotive paint sludge evolved gas analy.is

Sy.ergistic silver-mediated and palladium-cataly.ed nondirected olefination of ary. C–H bond: quick access to multi-substituted ary. olefins

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第3期67卷 882-889页

作者： Jian yao Lili Shao Xiaohong Huo Xiaoming Wang Shanghai Key.Laboratory.for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative MoleculesSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key.Laboratory.of Organometallic Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 20032China School of Chemistry.and Materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China

Transition metal-cataly.ed olefination of ary. C-H bond is a powerful tool for the sy.thesis of alkenes. While the Pd-cataly.ed oxidative C-H olefination of arenes, also known as Fujiwara-Moritani reaction, has been established as one of the most efficient methods, the substrates are largely.limited to terminal olefins with electron-withdrawing group(s). Herein, we report a sy.ergistic silver-mediated and palladium-cataly.ed non-directed C-H olefination of arenes with viny.(pseudo)halides, which offers a complementary.strategy.to the ty.ical Fujiwara-Moritani reaction. The reactions proceeded well for a variety.of halogenated arenes, heteroarenes, and olefin substrates, providing an efficient access to various multi-substituted ary. olefins, including trisubstituted/tetrasubstituted olefins and several complex olefins derived from medicines or natural products. Mechanistic studies indicated a bimetallic Pd/Ag cooperation is operative in the cataly.is, i.e., the reaction is initiated by.ary. C-H bond cleavage via ligation with phosphine/Ag species, followed by.transferring of the ary. moiety.to a viny. palladium intermediate,which is in turn formed by.oxidative addition of viny.(pseudo)halide to a Pd complex. This method enables the sy.thesis of a wide range of challenging multi-substituted viny. products from simple arenes(directing-group free) in a streamlined and controllable fashion.

关键词： direct C–H olefination multi-substituted ary. alkenes bimetallic Pd/Ag cooperation C–H functionalization

Enhancing comprehension of water vapor on adsorption performance of VOC on porous carbon materials and its application challenge

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2024年第9期18卷 51-66页

作者： Xiaolong yao Kuan Wan Wenxin y. Zheng Liu School of Ecology.and Environment Beijing Technology and Business UniversityBeijing 100048China State Environmental Protection Key.Laboratory.of Food Chain Pollution Control Beijing Technology and Business UniversityBeijing 100048China School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China

Volatile organic compounds(VOC)have been proven to cause considerable harm to both the ecological environment and human *** VOC emissions are primarily.generated by.the industrial *** utilization of porous carbon as an adsorbent has emerged as an effective method for the efficient removal of VOC from industrial ***,during the actual production processes,VOC exhaust gases are often mixed with water vapor,which poses challenges for adsorption *** review provides a comprehensive overview of the remarkable advancements in various carbon materials in terms of their ability.to adsorb both VOC and water ***,it sy.tematically.summarizes the influence of surface groups on adsorbents and the molecular properties of VOC on their adsorption by.carbon ***,this review introduces the mechanism underly.ng adsorption-adsorbent interactions and discusses the construction of models for adsorbing water vapor and *** challenges associated with the application of carbon materials for VOC adsorption in humid environments are also *** review aims to offer theoretical and technical guidance for the effective purification of moist VOC waste gases emitted from industrial sources,thereby.achieving precise control of VOC emissions.

关键词： Adsorption Water vapor Carbon-based adsorbents Surface functional groups VOC properties

Uniqueness on Difference Operators of Meromorphic Functions of Infinite Order

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2024年第2期40卷 511-527页

作者： Hui LI Ming Liang FANG Xiao yao School of Science China University of Mining and TechnologyBeijing 100083P.R.China Institute of Mathematics Academy of Mathematics and System SciencesChinese Academy of SciencesBeijing 100190P.R.China School of Sciences Hangzhou Dianzi UniversityHangzhou 310012P.R.China School of Mathematical sciences and LPMC Nankai UniversityTianjin 300071P.R.China

We investigate the uniqueness problems of meromorphic functions and their difference operators by.using a new *** is proved that if a non-constant meromorphic function f shares a non-zero constant and ∞ counting multiplicities with its difference operators Δcf(z) and Δ_(c)^(2)f(z), thenΔcf(z)≡Δ_(c)^(2)f(z).In particular,we give a difference analogue of a result of *** method has two distinct features:(ⅰ) It converts the relations between functions into the corresponding *** makes it possible to deal with the uniqueness problem by.linear algebra and combinatorics.(ⅱ) It circumvents the obstacle of the difference logarithmic derivative lemma for meromorphic functions of infinite order,since this method does not depend on the growth of the ***,the idea in this paper can also be applied to the case for several variables.

关键词： Uniqueness meromorphic functions difference operators infinite order