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Study on Shear Strength Characteristics of Basalt-Concrete Bonding Interface Based on in-situ Direct Shear Test

Journal of Earth Science 2024年第2期35卷 553-567页

作者： Peng xia Xinli Hu Chunye Ying Shuangshuang wu Chu Xu Xuan Wang Hao Chen Hang Duan College of Harbour and Coastal Engineering Jimei UniversityXiamen361021China Faculty of Engineering China University of GeosciencesWuhan430074China China Three Gorges Construction Group Ltd.Beijing100038China

In rock engineering,the shear strength of the basalt-concrete bonding interface is a key factor affecting the shear performance of hydroelectric dam foundations,embedded rock piles and rock *** this study,30 sets of in-situ direct shear tests were conducted on the basalt-concrete bond interface in the Baihetan dam area to investigate the shear strength characteristics of the basalt-concrete bonding *** bonding interface contains two states,i.e.,the bonding interface is not sheared,termed as se(symbolic meaning see Table 1);the bonding interface is sheared with rupture surface,termed as *** effects of lithology,Joints structure,rock type grade and concrete compressive strength on the shear strength of the concrete-basalt contact surface were *** test results show that the shear strength of the bonding interface(s_(e)&s_(i))of columnar jointed basalt with concrete is greater than that of the bonding interface(s_(e)&s_(i))of non-columnar jointed one with the same rock type *** the rock type grade isⅢ_(2),fcol is 1.22 times higher than fncol and ccol is 1.13 times greater than *** shear strength parameters of the basalt-concrete bonding interface differ significantly for different *** cohesion of the bonding interface(s_(i))of cryptocrystalline basalt with concrete is 2.05 times higher than that of the bonding interface(s_(i))of breccia lava with concrete under the same rock type grade *** type grade has a large influence on the shear strength of the non-columnar jointed basalt-concrete bonding interface(s_(e)&s_(i)).cnol increases by 33%when the grade of rock type rises fromⅢ_(1)toⅡ_(1).the rock type grade has a greater effect on bonding interface(s_(i))cohesion than the coefficient of *** the rock type grade is reduced fromⅢ_(2)toⅢ_(1),f_(ncol)′increases by 2%and c_(ncol)′improves by 44%.The shear strength of the non-columnar jointed basalt-concrete bonding interface(s_(e)&s_(i))increases wit

关键词： direct shear test basalt-concrete bonding interface shear strength parameters engineering geogolgy

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Study of the Relationship Between New Ionic Interaction Parameters and Salt Solubility in Electrolyte Solutions Based on Molecular Dynamics Simulation

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Journal of Ocean University of China 2024年第2期23卷 467-476页

作者： SUN Wenting HU Yangdong ZHENG Jiahuan SUN Qichao Chen xia DING Jiakun ZHANG Weitao wu Lianying College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China Institute of Chemical Engineering Guangdong Academy of Science Guangzhou 510665China

Studying the relationship between ionic interactions and salt solubility in seawater has implications for seawater desalination and mineral *** this paper,a new method of expressing ion-to-ion interaction is proposed by using molecular dynamics simulation,and the relationship between ion-to-ion interaction and salt solubility in a simulated seawater water-salt system is *** analyzing the variation of distance and contact time between ions in an electrolyte solution,from both spatial and temporal perspectives,new parameters were proposed to describe the interaction between ions:interaction distance(ID),and interaction time ratio(ITR).The best correlation between characteristic time ratio and solubility was found for a molar ratio of salt-to-water of 10:100 with a correlation coefficient of *** the same salt,a positive correlation was found between CTR and the molar ratio of salt and *** type 1-1,type 2-1,type 1-2,and type 2-2 salts,the correlation coefficients between CTR and solubility were 0.93,0.96,0.92,and 0.98 for a salt-to-water molar ratio of 10:100,*** solubility of multiple salts was predicted by simulations and compared with experimental values,yielding an average relative deviation of 12.4%.The new ion-interaction parameters offer significant advantages in describing strongly correlated and strongly hydrated electrolyte solutions.

关键词： molecular dynamics simulation interaction distance interaction time rate electrolyte aqueous solutions solubility

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Precipitation Evolution from Plain to Mountains during the July 2023 Extreme Heavy Rainfall Event in North China

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Journal of Meteorological Research 2024年第4期38卷 635-651页

作者： Mingxin LI Jisong SUN Feng LI Chong wu Rudi xia Xinghua BAO Jinfang YIN Xudong LIANG State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081

North China experienced devastating rainfall from 29 July to 1 August 2023,which caused substantial flooding and *** study analyzed observations from surface rain gauges and S-band dual-polarization radars to reveal the following unique features of the precipitation evolution from the plain to the mountains during this event.(1) The total rainfall was found concentrated along the Taihang Mountains at elevations generally > 200 m,and its spatiotemporal evolution was closely associated with northward-moving low-level jets.(2) Storms propagated northwestward with southeasterly steering winds,producing continuous rainfall along the eastern slopes of the Taihang Mountains owing to mountain blocking,which resulted in the formation of local centers of precipitation ***,most rainfall episodes with an extreme hourly rainfall rate(HRR),corresponding to large horizontal wind shear at low levels,actively occurred in the plain area to the east of the Taihang Mountains.(3) The western portion of the extreme heavy rain belt in the north was mainly caused by long-lasting cumulus–stratus mixed precipitation with HRR 20 mm h~(-1).The contributions of convective precipitation and cumulus–stratus mixed precipitation to the total rainfall of the southern and middle rain belts were broadly equivalent.(4) The local HRR maxima located at the transition zone from the plain to the mountains were induced by moderate storm-scale convective cells with active warm-rain processes and large number of small-sized rain droplets.(5) During the devastating rainfall event,it was observed that the rainfall peaked at around 1800 local time(LT) every day over the upstream plain area(no diurnal cycle of rainfall was observed in relation to the accumulated rainfall centers over mountain areas).This was attributable to convective activities along the storm propagation path,which was a resu

关键词： extreme rainfall from plain to mountains convective precipitation stratiform precipitation hourly rainfall rate low-level jet diurnal variation

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古琴音位图的创制者麴瞻及其《琴声律图》考

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中国音乐 2024年第2期 48-59,140页

作者：吴炯无锡古琴研究会

古琴音位图流传已久,暂未见有相关历史考证。本文从《琴苑要录》等文献中发现麴瞻的《琴声律图》是古琴史上最早的音位图。原著中的序文和图赞不但保存至今,而且证实了麴瞻为首创。本文又结合其他史料,考证得出麴瞻是初唐时期琴家,为高... 详细信息

古琴音位图流传已久,暂未见有相关历史考证。本文从《琴苑要录》等文献中发现麴瞻的《琴声律图》是古琴史上最早的音位图。原著中的序文和图赞不但保存至今,而且证实了麴瞻为首创。本文又结合其他史料,考证得出麴瞻是初唐时期琴家,为高昌王麴文泰之孙,并非60多年来琴界所误认的南朝僧人道照。由于唐代另有王大力署名的同名《琴声律图》,宋代又有王大方《琴声韵图》,且三者关系不明。因此,本文对三种图书的内容和演变作出分析,发现麴瞻的《琴声律图》正因被同时代的王大力承诏撰成同名琴著出版,才在官方书目中长期被湮没,直到南宋得以重现。

关键词：麴瞻道照王大力王大方琴声律图琴声韵图

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Insufficient TRPM5 Mediates Lipotoxicity-induced Pancreaticβ-cell Dysfunction

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Current Medical Science 2024年第2期44卷 346-354页

作者： Kai-yuan WANG Shi-mei wu Zheng-jian YAO Yun-xia ZHU xiao HAN Key Laboratory of Human Functional Genomics of Jiangsu Province Department of Biochemistry and Molecular BiologyNanjing Medical UniversityNanjing 211166China

Objective:While the reduction of transient receptor potential channel subfamily M member 5(TRPM5)has been reported in islet cells from type 2 diabetic(T2D)mouse models,its role in lipotoxicity-induced pancreaticβ-cell dysfunction remains *** study aims to study its ***:Pancreas slices were prepared from mice subjected to a high-fat-diet(HFD)at different time points,and TRPM5 expression in the pancreaticβcells was examined using immunofluorescence ***-stimulated insulin secretion(GSIS)defects caused by lipotoxicity were mimicked by saturated fatty acid palmitate(Palm).Primary mouse islets and mouse insulinoma MIN6 cells were treated with Palm,and the TRPM5 expression was detected using qRT-PCR and Western ***-induced GSIS defects were measured following siRNA-based Trpm5 *** detrimental effects of Palm on primary mouse islets were also assessed after overexpressing Trpm5 via an adenovirus-derived Trpm5(Ad-Trpm5).Results:HFD feeding decreased the mRNA levels and protein expression of TRPM5 in mouse pancreatic *** reduced TRPM5 protein expression in a time-and dose-dependent manner in MIN6 *** also inhibited TRPM5 expression in primary mouse *** of Trpm5 inhibited insulin secretion upon high glucose stimulation but had little effect on insulin *** of Trpm5 reversed Palm-induced GSIS defects and the production of functional maturation molecules unique toβ***:Our findings suggest that lipotoxicity inhibits TRPM5 expression in pancreaticβcells both in vivo and in vitro and,in turn,drivesβ-cell dysfunction.

关键词： type 2 diabetes β-cell dysfunction lipotoxicity TRPM5

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A rapid assessment of MWRI-RM/FY3G brightness temperature

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Atmospheric and Oceanic Science Letters 2024年第3期17卷 42-46页

作者： Wenying He Xinran xia Shengli wu Peng Zhang Hongbin Chen xiang'ao xia Yuquan Zhou Miao Cai LAGEO Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina School of Hydrology and Water Resources Nanjing University of Information Science&TechnologyNanjingChina National Satellite Meteorological Centure Chinese Meteorological AdministrationBeijingChina College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijingChina Key Laboratory of Cloud-Precipitation Physics and Weather Modification CMABeijingChina

2023年4月发射的FY-3G上搭载17个频率的测雨微波成像仪(MWRI-RM),其业务定标的微波亮温(Tb)数据于2023年10月23日公开发布.本文比对了发布10天的MWRI-RM与全球降水测量(GPM)卫星上的微波成像仪(GMI)相匹配的Tb数据,并借助辐射传输模式... 详细信息

2023年4月发射的FY-3G上搭载17个频率的测雨微波成像仪(MWRI-RM),其业务定标的微波亮温(Tb)数据于2023年10月23日公开发布.本文比对了发布10天的MWRI-RM与全球降水测量(GPM)卫星上的微波成像仪(GMI)相匹配的Tb数据,并借助辐射传输模式进行双差分(DD)交叉定标分析,旨在快速评估新一代MWRI-RM观测数据质量.观测比较表明,MWR1-RM与GMI测量的Tb一致性很好,大多通道的平均偏差(MBE)和均方根误差(RMSE)均小于1K.两种传感器由于观测角度略有不同在水面产生约0.5 K差异.DD分析也展示出MWRI-RM的大多数通道性能与GMI相当接近,尤其是首次启用的高频166 GHz和183 GHz.

关键词： FY3G MWRI-RM GMI 亮度温度双差分方法

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Photocatalytic vinyl radical-mediated multicomponent 1,4-/1,8-carboimination across alkynes and olefins/(hetero)arenes

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Science China Chemistry 2024年第2期67卷 558-567页

作者： Shan-Shan Li Yu-Shi Jiang Xue-Ling Luo Xuming Ran Yuqiang Li Dong wu Cheng-Xue Pan Peng-Ju xia School of Chemistry and Pharmaceutical Sciences Guangxi Normal UniversityGuilin541004China Shanghai Artificial Intelligence Laboratory Shanghai200433China The Institute for Advanced Studies Wuhan UniversityWuhan430064China

We developed a highly selective and efficient multicomponent transformation by utilizing alkynes and olefins/(hetero)arenes through photoinduced energy-transfer *** reaction involves the formation of three distinct chemical bonds,namely C(sp~3)–C(sp~2),C(sp~2)–C(sp~3),and C(sp~3)–N,in a single coordinated *** strategy used a vinyl radical-mediated radical relay approach under mild conditions,exhibiting a broad substrate scope(>70 examples),excellent functional-group tolerance,and remarkable regio-and *** the utilization of a combination of experimental techniques and density functional theory(DFT),we delved deeper into the mechanistic intricacies of this distinctive *** revealed that the selective radical addition to electron-deficient alkynes,rather than olefins,was governed by the inherent reactivity of alkyl *** discovery presented a highly effective approach for the synthesis of stereodefined multisubstituted alkenes.

关键词： alkyne-olefin coupling DFT studies regio-and anti-stereoselectivity multisubstituted alkenes

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Adiposity in Chinese people with type 1 diabetes

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World Journal of Diabetes 2024年第7期15卷 1404-1408页

作者： Nian-Wei wu xia-Fei Lyu Zhen-Mei An She-Yu Li Department of Endocrinology and Metabolism West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Radiology West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Guideline and Rapid Recommendation Chinese Evidence-based Medicine CenterCochrane China Center and MAGIC China CenterWest China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

Adiposity,synonymous with obesity,is prevalent among both children and adults with type 1 diabetes in *** literature underscored the pathophysiological and socioeconomic factors associated with adiposity,and consistently highlighted its impact on cardiovascular,kidney,and metabolic diseases among Chinese individuals with type 1 *** and managing adiposity in individuals with type 1 diabetes are complicated and entail comprehensive approaches including lifestyle modifications,cognitive-behavioral therapy,insulin dose titration,and other diabetes treatment *** condition calls for coordination among policymakers,researchers,clinicians,and patients.

关键词： Type 1 diabetes China Metabolic syndrome Obesity Anti-obesity medications

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Study of baryon number transport dynamics and strangeness conservation effects using Ω-hadron correlations

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Nuclear Science and Techniques 2024年第7期35卷 147-156页

作者： Wei-Jie Dong xiao-Zhou Yu Si-Yuan Ping xia-Tong wu Gang Wang Huan-Zhong Huang Zi-Wei Lin Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Fudan UniversityShanghai 200433China Department of Physics and Astronomy University of CaliforniaLos AngelesCA 90095USA Department of Physics East Carolina UniversityGreenvilleNC 27858USA

In nuclear collisions at RHIC energies, an excess of Ω hyperons over ■ is observed, indicating that Ω has a net baryon number despite s and s quarks being produced in pairs. The baryon number in Ω may have been transported from the incident nuclei and/or produced in the baryon-pair production of Ω with other types of anti-hyperons such as Ξ. To investigate these two scenarios, we propose to measure the correlations between Ω and K and between Ω and anti-hyperons. We use two versions, the default and string-melting, of a multiphase transport(AMPT) model to illustrate the method for measuring the correlation and to demonstrate the general shape of the correlation. We present the Ω-hadron correlations from simulated Au+Au collisions at ■ =7.7 and 14.6 Ge V and discuss the dependence on the collision energy and on the hadronization scheme in these two AMPT versions. These correlations can be used to explore the mechanism of baryon number transport and the effects of baryon number and strangeness conservation on nuclear collisions.

关键词： Baryon number transport Strangeness conversation Correlation Gluon junction

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Regulation Flexibility Assessment and Optimal Aggregation Strategy of Greenhouse Loads in Modern Agricultural Parks

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Protection and Control of Modern Power Systems 2024年第3期9卷 98-111页

作者： Shiwei xia Liuyang Cai Mingze Tong Ting wu Peng Li xiang Gao IEEE the School of Electrical and Electronic Engineering North China Electric Power UniversityBeijingChina North China Electric Power University BeijingChina the School of Mechanical Engineering and Automation Harbin Institute of TechnologyShenzhen 518055China the Economic and Technical Research Institute of State Grid Henan Electric Power Company Shenzhen Polytechnic University ShenzhenChina

With advances in modern agricultural parks,the rural energy structure has undergone profound change,leading to the emergence of an agricultural energy *** integrated system combines agricultural energy utilization,the information internet,and agricultural ***,this study proposes a regulation flexibility assessment approach and optimal aggregation strategy of greenhouse loads(GHLs)for modern agricultural ***,taking into account the operational characteristics of typical GHLs,refined load demand models for lighting,humidification,and temperature-controlled loads are ***,the recursive least squares method-based parameter identification method is designed to accurately determine key GHL model ***,based on the regulation flexibility of quantitatively evaluated GHLs,GHLs are optimally aggregated into multiple flexible aggregators considering minimal operational cost and greenhouse environmental *** results indicate that the proposed regulation flexibility assessment approach and optimal aggregation strategy of GHLs can alleviate the peak regulation pressure on power grids by flexibly shifting the load demands of GHLs.

关键词： Agricultural park,greenhouse load parameter identification,regulation flexibility,optimal aggregation of GHLs

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