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Landslide model tests with a miniature 2D principal stress sensor

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Journal of Rock Mechanics and Geotechnical Engineering 2025年第1期17卷 94-105页

作者： Kun Fang Yulei Fu Huiming Tang Tangzhe Gao Pengju An Qiong Wu Faculty of Engineering China University of GeosciencesWuhan430074China Badong national Observation and Research Station of Geohazards China University of GeosciencesWuhan430074China Institute of Rock Mechanics Ningbo UniversityNingbo315211China

Understanding the stress distribution derived from monitoring the principal stress(PS)in slopes is of great *** this study,a miniature sensor for quantifying the two-dimensional(2D)PS in landslide model tests is *** fundamental principle and design of the sensor are *** sensor comprises three earth pressure gages and one gyroscope,with the utilization of three-dimensional(3D)printing *** difficulties of installation location during model preparation and sensor rotation during testing can be effectively overcome using this *** different arrangements of the sensors are tested in verification ***,the application of the sensor in an excavated-induced slope model is *** results demonstrate that the sensor exhibits commendable performance and achieves a desirable level of accuracy,with a principal stress angle error of±5°in the verification *** stress transformation of the slope model,generated by excavation,is demonstrated in the application test by monitoring the two miniature principal stress(MPS)*** sensor has a significant potential for measuring primary stress in landslide model tests and other geotechnical model experiments.

关键词： Landslide Model test Principal stress(PS) Stress measurement

Novel titanium vanadate with superior Na^(+) transport kinetics for rapid charging and low-temperature sodium ion batteries

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Green Energy & Environment 2025年第2期10卷 374-381页

作者： Dan Lv Liehao Wei Cheng Wang Mingyue Wang Zhongchao Bai Yameng Fan Dongdong Wang Nana Wang Jian Yang Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education) School of Materials Science and EngineeringTianjin UniversityTianjin300072China Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong UniversityJinan250100China Tianjin Key Lab of Indoor Air Environmental Quality Control School of Environmental Science and TechnologyTianjin UniversityTianjin300072China Institute for Superconducting and Electronic Materials University of WollongongWollongongAustralia Institute of Energy Materials science(IEMS) University of Shanghai for Science and Technology516 Jungong RoadShanghai200093China

Sodium-ion batteries(SIBs)hold great promise for large-scale energy storage in the post-lithium-ion battery era due to their high rate performance and long lifespan,although their sluggish Na^(+) transformation kinetics still require *** by the excellent electrochemical performance of titanium-based anode materials,here,we present a novel titanium vanadate@carbon(TVO@C)material as anode for *** TVO@C material is synthesized via a facile coprecipitation method,with the following annealing process in an acetylene *** opened ion channel and the oxygen vacancies within TVO@C facilitate the diffusion of Na^(+) ions,reducing their diffusion ***,an ultrahigh rate of 100 A g^(-1)and long life of 10,000 cycles have been ***,the TVO@C electrode exhibits stable performance,not only at room temperature,but also at temperatures as low as 20 *** TVO@CjjNa_(3)V_(2)(PO_(4))_(3)@C full cells have also achieved stable discharge/charge for 500 *** is believed that this strategy provides new insight into the development of advanced electrodes and provides a new opportunity for constructing novel high rate electrodes.

关键词： Anode High rate Titanium vanadate Sodium ion batteries

Multifunctional Graphdiyne Enables Efficient Perovskite Solar Cells via Anti-Solvent Additive Engineering

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Nano-Micro Letters 2025年第5期17卷 492-507页

作者： Cong Shao Jingyi He Jiaxin Ma Yirong Wang Guosheng Niu Pengfei Zhang Kaiyi Yang Yao Zhao Fuyi Wang Yongjun Li Jizheng Wang CAS Key Laboratory of Organic Solids Institute of ChemistryBeijing National Laboratory for Molecular SciencesChinese Academy of SciencesBeijing 100049People’s Republic of China University of Chinese Academy of sciences Beijing 100049People’s Republic of China CAS Key Laboratory of Engineering Plastics Institute of ChemistryChinese Academy of SciencesBeijing 100049People’s Republic of China CAS Key Laboratory of Photochemistry Institute of ChemistryChinese Academy of SciencesBeijing 100049People’s Republic of China national Centre for Mass Spectrometry in Beijing CAS Key Laboratory of Analytical Chemistry for Living BiosystemsBeijing National Laboratory for Molecular SciencesChinese Academy of SciencesBeijing 100049People’s Republic of China

Finding ways to produce dense and smooth perovskite films with negligible defects is vital for achieving high-efficiency perovskite solar cells(PSCs).Herein,we aim to enhance the quality of the perovskite films through the utilization of a multifunctional additive in the perovskite anti-solvent,a strategy referred to as anti-solvent additive ***,we introduce ortho-substituted-4′-(4,4″-di-tertbutyl-1,1′:3′,1″-terphenyl)-graphdiyne(o-TB-GDY)as an AAE additive,characterized by its sp/sp^2-cohybridized and highlyπ-conjugated structure,into the anti-solvent.o-TB-GDY not only significantly passivates undercoordinated lead defects(through potent coordination originating from specific highπ–electron conjugation),but also serves as nucleation seeds to effectively enhance the nucleation and growth of perovskite *** markedly reduces defects and non-radiative recombination,thereby increasing the power conversion efficiency(PCE)to 25.62%(certified as 25.01%).Meanwhile,the PSCs exhibit largely enhanced stability,maintaining 92.6%of their initial PCEs after 500 h continuous 1-sun illumination at~23°C in a nitrogen-filled glove box.

关键词： Perovskite solar cells Graphdiyne Anti-solvent additive engineering Crystallization Defect passivation

New alkylbenzene parameters to identify organic matter sources for source rocks of light oils and condensates from the Tarim Basin and Beibuwan Basin

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Petroleum science 2025年第01期22卷 76-89页

作者： Bing-Kun Meng Dao-Fu Song Yuan Chen Sheng-Bao Shi School of Petroleum Engineering and Environmental Engineering Yan'an University national Key Laboratory of Petroleum Resources and Engineering College of Geosciences China University of Petroleum (Beijing)

As an important component of light hydrocarbon compounds, alkylbenzene compounds lack indicators to indicate the source of organic matter of light oils and condensates. Forty-one oil samples from the Tarim Basin and Beibuwan Basin were analyzed by comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry(GC × GC-TOFMS). The concentration distributions of thirteen light hydrocarbon compounds with organic matter source and sedimentary environment indication were studied. There is no significant difference in the concentrations of 1-methylpropylbenzene(MPB) in all studied oils. However, the concentrations of 2-MPB in the Tarim swamp oils are higher than that in the Beibuwan lacustrine oils and Tarim marine oils. Based on the significant concentration difference of 1-and 2-MPB in all studied oils, 1-/2-MPB(MPBr) was proposed as an indicator to identify the source of organic matter in crude oils. The MPBr values greater than 1.5 indicate that the crude oil mainly comes from lower aquatic organisms, bacteria, and algae. The MPBr values greater than 1.0 and less than 1.5indicate that crude oil was derived from the combined contributions of lower aquatic organisms, bacteria and algae, and terrestrial higher plants. The MPBr values less than 1.0 suggest that the crude oil was mainly derived from terrigenous higher plants. The MPBr values in crude oils basically are not or slightly affected by depositional environment and secondary alteration. The MPBr values can be used to infer the organic matter origin in sediments, especially for the lack of biomarkers of light oils and condensates.

关键词： 2-Methylpropylbenzene GC×GC-TOFMS Organic matter source Light oils and condensates

A phenylphenthiazide anchored Tb(Ⅲ)-cyclen complex for fluorescent turn-on sensing of ClO^(-)

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Chinese Chemical Letters 2025年第2期36卷 269-273页

作者： Ya-Ping Liu Zhi-Rong Gui Zhen-Wen Zhang Sai-Kang Wang Wei Lang Yanzhu Liu Qian-Yong Cao School of Chemistry and Chemical Engineering Nanchang UniversityNanchang 330031China

A phenylphenothiazine anchored Tb(Ⅲ)-cyclen complex PTP-Cy-Tb for hypochlorite ion(ClO^(-))detection has been designed and ***-Cy-Tb shows a weak Tb-based emission with AIE-characteristics in aqueous *** addition of ClO^(-),the fluorescence of PTP-Cy-Tb gives a large enhancement for oxidization the thioether to sulfoxide *** detection limit of PTP-Cy-Tb toward ClO^(-)is as low as 8.85 nmol/*** sensing mechanism was detailedly investigated by time of flight mass spectrometer(TOF-MS),Fourier transform infrared spectroscopy(FT-IR)and density functional theory(DFT)*** addition,PTP-Cy-Tb has been successfully used for on-site and real-time detection of ClO^(-)in real water samples by using the smartphone-based visualization method and test strips.

关键词： Phenylphenothiazine Tb(III)complex AIE Hypochlorite ion Sensing

Impact of probiotics-derived extracellular vesicles on livestock gut barrier function

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Journal of Animal science and Biotechnology 2025年第1期16卷 34-48页

作者： Yuhan Zhang Mengzhen Song Jinping Fan Xuming Guo Shiyu Tao College of Animal sciences and Technology Huazhong Agricultural UniversityNo.1 Shizishan StreetHongshan DistrictWuhanHubei Province 430070China

Probiotic extracellular vesicles(pEVs)are biologically active nanoparticle structures that can regulate the intestinal tract through direct or indirect *** enhance the intestinal barrier function in livestock and poultry and help alleviate intestinal *** specific effects of pEVs depend on their internal functional components,including nucleic acids,proteins,lipids,and other *** paper presents a narrative review of the impact of pEVs on the intestinal barrier across various segments of the intestinal tract,exploring their mechanisms of action while highlighting the limitations of current *** the mechanisms through which probiotics oper-ate via pEVs could deepen our understanding and provide a theoretical foundation for their application in livestock production.

关键词： Extracellular vesicles Intestinal barrier Livestock production Probiotics

Tree growth decline to warm-wet conditions in boreal forests is linked to stand density

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Forest Ecosystems 2025年第1期12卷 74-82页

作者： Bingqian Zhao Yihong Zhu Lushuang Gao Qibing Zhang Mingqian Liu Klaus von Gadow Research Center of Forest Management Engineering of State Forestry and Grassland Administration Beijing Forestry UniversityBeijing100083China State Forestry and Grassland Administration Key Laboratory of Forest Resources&Environmental Management Beijing Forestry UniversityBeijing100083China Department of Environmental science Policy and ManagementUniversity of CaliforniaBerkeley94704USA State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing100093China Laboratory of Wood Technology Ghent UniversityCoupure links 6539000GhentBelgium Faculty of Forestry and Forest Ecology Georg-August-University GottingenBüsgenweg 5D-37077GottingenGermany Department of Forestry and Wood science Faculty of AgriSciencesStellenbosch UniversityStellenbosch Private Bag X1Stellenbosch7602South Africa

Warm-wet climatic conditions are widely regarded as conducive to remarkable tree growth,alleviating climatic ***,the notable decline in tree growth observed in the southern edge of boreal forests has heightened concerns over the spatial-temporal dynamics of forest ***,attaining a comprehensive grasp of the underlying patterns and their propelling factors remains a formidable *** collected tree ring samples from a network of 50 sites across the Greater Xing'an *** samples were subsequently grouped into two distinct clusters,designated as Groups A and *** percentage change of growth(GC,%)and the proportion of declining sites were utilized to assess forest *** decline in tree growth within Larix gmelinii forests exhibits significant regional variation,accompanied by temporal fluctuations even within a given *** A exhibited a pronounced increase in frequency(59.26%)of occurrences and encountered more severe declines(21.65%)in tree growth subsequent to the 1990s,contrasting sharply with Group B,which observed lower frequencies(20.00%)and relatively less severe declines(21.02%)prior to the *** primary impetus underlying the opposite radial growth increments observed in Larix gmelinii trees from the interplay between their differential response to temperatures and wetter climatic conditions,which is significantly influenced by varying stand *** cold-dry conditions,low-density forests may experience soil water freezing,exacerbating drought conditions and thereby inhibiting tree growth,in Group *** growth in high-density stands is restrained by warm-wet conditions,in Group *** results provide new insights into the variability at the southern edge of the boreal forest biome with different responses to density and climate.

关键词： Growth decline Stand density The southern edge of boreal forests Larix gmelinii

Acceptance effect on the N_(t)N_(p)/N_(d)^(2)ratio of light nuclei coalescence yields as a probe of nucleon density fluctuations

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Nuclear science and Techniques 2025年第3期36卷 157-166页

作者： An Gu Michael X.Zhang Huzhou University Huzhou 313000China Purdue University West LafayetteIN 47907USA Livermore High School LivermoreCA 94550USA

A coalescence model was employed to form deuterons(d),tritons(t),and helium-3(^(3)He)nuclei from a uniformly-distributed volume of protons(p)and neutrons(n).We studied the ratio N_(t)N_(p)/N_(d)^(2)of light nuclei yields as a function of the neutron density *** investigated the effect of finite transverse momentum(p_(T))acceptance on the ratio,in particular,the“extrapolation factor”(f)for the ratio as a function of the p_(T)spectral shape and the magnitude of neutron density *** nature of f was found to be monotonic in p_(T)spectra“temperature”parameter and neutron density fluctuation magnitude;variations in the latter are relatively *** also examined f in realistic simulations using the kinematic distributions of protons measured from the heavy-ion collision *** nature of f was found to be smooth and monotonic as a function of the beam ***,we conclude that extrapolation from limited p_(T)ranges does not create,enhance,or reduce the local peak of the N_(t)N_(p)/N_(d)^(2)ratio in the beam *** study provides a necessary benchmark for light nuclei ratios as a probe for nucleon density fluctuations,an important observation in the search for the critical point of nuclear matter.

关键词： Heavy-ion collision Critical point Light nuclei coalescence Nucleon density fluctuations

Effect of regional crosstalk between sympathetic nerves and sensory nerves on temporomandibular joint osteoarthritic pain

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INTERnational JOURNAL OF ORAL science 2025年第1期17卷 3-3页

作者： Ma, Zhangyu Wan, Qianqian Qin, Wenpin Qin, Wen Yan, Janfei Zhu, Yina Wang, Yuzhu Ma, Yuxuan Wan, Meichen Han, Xiaoxiao Zhao, Haoyan Hou, Yuxuan Tay, Franklin R. Niu, Lina Jiao, Kai Fourth Mil Med Univ Tangdu Hosp Dept Stomatol Xian Peoples R China Fourth Mil Med Univ Sch Stomatol State Key Lab Oral & Maxillofacial Reconstruct & R Xian Peoples R China Fourth Mil Med Univ State Key Lab Oral & Maxillofacial Reconstruct & R Xian Peoples R China Fourth Mil Med Univ Natl Clin Res Ctr Oral Dis Xian Peoples R China Fourth Mil Med Univ Sch Stomatol Shaanxi Key Lab Stomatol Xian Peoples R China Augusta Univ Grad Sch Augusta GA USA

Temporomandibular joint osteoarthritis (TMJ-OA) is a common disease often accompanied by pain, seriously affecting physical and mental health of patients. Abnormal innervation at the osteochondral junction has been considered as a predominant origin of arthralgia, while the specific mechanism mediating pain remains unclear. To investigate the underlying mechanism of TMJ-OA pain, an abnormal joint loading model was used to induce TMJ-OA pain. We found that during the development of TMJ-OA, the increased innervation of sympathetic nerve of subchondral bone precedes that of sensory nerves. Furthermore, these two types of nerves are spatially closely associated. Additionally, it was discovered that activation of sympathetic neural signals promotes osteoarthritic pain in mice, whereas blocking these signals effectively alleviates pain. In vitro experiments also confirmed that norepinephrine released by sympathetic neurons promotes the activation and axonal growth of sensory neurons. Moreover, we also discovered that through releasing norepinephrine, regional sympathetic nerves of subchondral bone were found to regulate growth and activation of local sensory nerves synergistically with other pain regulators. This study identified the role of regional sympathetic nerves in mediating pain in TMJ-OA. It sheds light on a new mechanism of abnormal innervation at the osteochondral junction and the regional crosstalk between peripheral nerves, providing a potential target for treating TMJ-OA pain.

关键词： pain nerves sympathetic