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Fracture behavior of sandstone with partial filling flaw under mixed-mode loading: Three-point bending tests and discrete element method

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Journal of Rock Mechanics and Geotechnical Engineering 2025年第1期17卷 291-308页

作者： Dongdong ma Yu Wu Xiao ma Xunjian Hu Wenbao Dong Decheng Li Lingyu Li State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhou221116China State Key Laboratory of Structural Health and Safety of bridges Wuhan430034China Research Center of Coastal and Urban Geotechnical Engineering Zhejiang UniversityHangzhou310058China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China

The fracture behavior of natural fracture in the geological reservoir subjected to filling property,affects the crack initiation and propagation under stress *** filling flaws were intermediate between open fractures and filled fractures,the fracture response may be worth *** this work,the effect of the filling property of sandstone with partial filling flaws on the fracture behavior was systematically investigated based on three-point bending tests and the numerical approach of discrete element method(DEM).In the laboratory,semi-circular three-point bending tests were carried out with partial filling flaws of various filling *** on this,numerical simulations were used to further investigate the effect of the filling ratio and the inclination of the partial filling flaw on the mechanical and fracture responses,and the effect of the partial filling flaw under mixed-mode loading on the fracture mechanism was elucidated coupled with acoustic emission(AE)*** obtained results showed that the increase in filling strength and filling ratio of partial filling flaw led to an increase in peak strength,with a decreasing trend in peak strength with the inclination of partial filling *** terms of crack propagation pattern,the increasing filling strength of the partial filling flaw induced the transformation of the fracture mechanism toward deflection,with a tortuosity path,while the filling ratio and inclination of partial filling flaw led to fracture mechanism change from deflection to penetration and attraction,accompanied with a larger AE event source in ***,the b-value based on the Gutenberg-Richter equation fluctuated between 5 and 4 at low filling ratio and inclination and remained around 5 at high filling ratio and inclination of partial filling *** results may provide an application prospective for reservoir stimulation using the natural fracture system.

关键词： Partial filling flaw Mixed-mode loading Semi-circular three-point bending Acoustic emission(AE) b-value

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Antineutrino energy spectrum unfolding based on the Daya bay measurement and its applications

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Chinese Physics C 2021年第7期45卷 1-19页

作者： F.P.An A.b.balantekin M.bishai S.blyth G.F.Cao J.Cao J.F.Chang Y.Chang H.S.Chen S.M.Chen Y.Chen Y.X.Chen J.Cheng z.K.Cheng J.J.Cherwinka M.C.Chu J.P.Cummings O.Dalager F.S.Deng Y.Y.Ding M.V.Diwan T.Dohnal D.Dolzhikov J.Dove M.Dvorak D.A.Dwyer J.P.Gallo M.Gonchar G.H.Gong H.Gong M.Grassi W.Q.Gu J.Y.Guo L.Guo X.H.Guo Y.H.Guo z.Guo R.W.Hackenburg S.Hans a M.He K.M.Heeger Y.K.Heng Y.K.Hor Y.b.Hsiung b.z.Hu J.R.Hu T.Hu z.J.Hu H.X.Huang J.H.Huang X.T.Huang Y.b.Huang P.Huber D.E.Jaffe K.L.Jen X.L.Ji X.P.Ji R.A.Johnson D.Jones L.Kang S.H.Kettel S.Kohn M.Kramer T.J.Langford J.Lee J.H.C.Lee R.T.Lei R.Leitner J.K.C.Leung F.Li H.L.Li J.J.Li Q.J.Li R.H.Li S.Li S.C.Li W.D.Li X.N.Li X.Q.Li Y.F.Li z.b.Li H.Liang C.J.Lin G.L.Lin S.Lin J.J.Ling J.M.Link26 L.Littenberg b.R.Littlejohn J.C.Liu J.L.Liu J.X.Liu C.Lu H.Q.Lu K.b.Luk b.z.ma X.b.ma X.Y.ma Y.Q.ma R.C.mandujano C.marshall K.T.McDonald R.D.McKeown Y.Meng J.Napolitano D.Naumov E.Naumova T.M.T.Nguyen J.P.Ochoa-Ricoux A.Olshevskiy H.-R.Pan J.Park S.Patton J.C.Peng C.S.J.Pun F.z.Qi M.Qi X.Qian N.Raper J.Ren C.Morales Reveco R.Rosero b.Roskovec X.C.Ruan H.Steiner J.L.Sun T.Tmej1 K.Treskov W.-H.Tse C.E.Tull b.Viren V.Vorobel C.H.Wang J.Wang M.Wang N.Y.Wang R.G.Wang W.Wang W.Wang X.Wang Y.Wang Y.F.Wang z.Wang z.Wang z.M.Wang H.Y.Wei L.H.Wei L.J.Wen K.Whisnant C.G.White H.L.H.Wong E.Worcester D.R.Wu F.L.Wu Q.Wu W.J.Wu D.M.Xia z.Q.Xie z.z.Xing H.K.Xu J.L.Xu T.Xu T.Xue C.G.Yang L.Yang Y.z.Yang H.F.Yao M.Ye M.Yeh b.L.Young H.z.Yu z.Y.Yu b.b.Yue V.zavadskyi S.zeng Y.zeng L.zhan C.zhang F.Y.zhang H.H.zhang J.W.zhang Q.M.zhang S.Q.zhang X.T.zhang Y.M.zhang Y.X.zhang Y.Y.zhang z.J.zhang z.P.zhang z.Y.zhang J.zhao R.z.zhao L.zhou H.L.zhuang J.H.zou Institute of Modern Physics East China University of Science and TechnologyShanghai 200337 University of Wisconsin MadisonWisconsin 53706 brookhaven National Laboratory UptonNew York 11973 Department of Physics Nnational Taiwan UniversityTaipei Institute of High Energy Physics Beijing 100049 National United University Miao-Li Department of Engineering Physics Tsinghua UniversityBeijing 100048 Shenzhen University Shenzhen 518061 Sun Yat-Sen(zhongshan)University Guangzhou 510275 North China Electric Power University Beijing 102206 Chinese University of Hong Kong Hongkong 999077 Siena College LoudonvilleNew York 12211 Department of Physics and Astronomy University of CaliforniaIrvineCalifornia 92697 University of Science and Technology of China Hefei 230022 Charles University Faculty of Mathematics and PhysicsPrague Joint Institute for Nuclear Research DubnaMoscow Region Department of Physics University of Illinois at Urbana-ChampaignUrbanaIllinois 61801 Lawrence berkeley National Laboratory BerkeleyCalifornia 94720 Department of Physics Illinois Institute of TechnologyChicagoIllinois 60616 beijing Normal University Beijing 100875 Department of Nuclear Science and Technology School of Energy and Power EngineeringXi'an Jiaotong UniversityXi'an 710049 Wright Laboratory and Department of Physics Yale UniversityNew HavenConnecticut 06520 China Institute of Atomic Energy Beijing 102413 Shandong University Jinan 250002 Guangxi University No.100 Daxue East RoadNanning 530004 Center for Neutrino Physics Virginia TechBlacksburgVirginia 24061 Institute of Physics NCTUHsinchu Department of Physics University of CincinnatiCincinnatiOhio 45221 Department of Physics College of Science and TechnologyTemple UniversityPhiladelphiaPennsylvania 19122 Dongguan University of Technology Dongguan 523808 Department of Physics University of CaliforniaBerkeleyCalifornia 94720 Department of Physics The University of Hong KongPokfulamHongkong 999077 School of Physics Nankai UniversityTianjin 300071 Department o

The prediction of reactor antineutrino spectra will play a crucial role as reactor experiments enter the precision *** positron energy spectrum of 3.5 million antineutrino inverse beta decay reactions observed by the Daya bay experiment,in combination with the fission rates of fissile isotopes in the reactor,is used to extract the positron energy spectra resulting from the fission of specific *** information can be used to produce a precise,data-based prediction of the antineutrino energy spectrum in other reactor antineutrino experiments with different fission fractions than Daya *** positron energy spectra are unfolded to obtain the antineutrino energy spectra by removing the contribution from detector response with the Wiener-SVD unfolding *** results are obtained with other unfolding methods.A technique to construct a data-based prediction of the reactor antineutrino energy spectrum is proposed and *** the reactor fission fractions,the technique can predict the energy spectrum to a 2%*** addition,we illustrate how to perform a rigorous comparison between the unfolded antineutrino spectrum and a theoretical model prediction that avoids the input model bias of the unfolding method.

关键词： reactor antineutrino energy spectrum Daya bay application

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Electromagnetic wave absorption and corrosion resistance performance of carbon nanoclusters/Ce-Mn codoped barium ferrite composite materials

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International Journal of Minerals,Metallurgy and materials 2025年第3期32卷 699-709页

作者： bo Li Lin ma Sinan Li Jiewu Cui Xiaohui Liang Wei Sun Pengjie zhang Nan Huang Song ma zhidong zhang Shenyang National Laboratory for materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China School of Metallurgy Engineering Liaoning Institute of Science and TechnologyBenxi 117004China School of materials Science and Engineering Hefei University of TechnologyHefei 230009China Institute of Microelectronics Hangzhou Dianzi UniversityHangzhou 310018China bGRIMM magnetic materials&Technology Co. Ltd.Beijing 100160China

To realize the application of electromagnetic wave absorption(EWA)devices in humid marine environments,bifunctional EWA materials with better EWA capacities and anticorrosion properties have great exploration significance and systematic research *** utilizing the low-cost and excellent magnetic and stable chemical characteristics of barium ferrite(baFe_(12)O_(19))and using the high dielectric loss and excellent chemical inertia of nanocarbon clusters,a new type of nanocomposites with carbon nanoclusters en-capsulating baFe_(12)O_(19)was designed and synthesized by combining an impregnation method and a high-temperature calcination ***,Ce-Mn ions were introduced into the baFe_(12)O_(19)lattice to improve the dielectric and magnetic properties of baFe_(12)O_(19)cores significantly,and the energy band structure of the doped lattice and the orders of Ce replacing Fe sites were *** from Ce-Mn ion doping and carbon nanocluster encapsulation,the composite material exhibited excellent dual functionality of corrosion resist-ance and *** baCe_(0.2)Mn_(0.3)Fe_(11.5)O_(19)-C(bCM-C)was calcined at 600°C,the minimum reflection loss of-20.1 db was achieved at 14.43 *** Ku band’s effective absorption bandwidth of 4.25 GHz was achieved at an absorber thickness of only 1.3 *** bCM-C/polydimethylsiloxane coating had excellent corrosion resistance in the simulated marine environment(3.5wt%NaCl solution).The|z|0.01Hz value of bCM-C remained at 106Ω·cm^(2)after 12 soaking *** successful preparation of the baFe_(12)O_(19)composite en-capsulated with carbon nanoclusters provides new insights into the preparation of multifunctional absorbent materials and the fabrication of absorbent devices applied in humid marine environments in the future.

关键词： electromagnetic wave absorption anticorrosion barium ferrite cerium and manganese doping carbon nanoclusters

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Hydration, Microstructure, and Properties of Sulphoaluminate Cement in Pure Water and Simulated Seawater

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Journal of Wuhan University of Technology(materials Science) 2025年第1期40卷 187-193页

作者： ma Jie China Railway Design Corporation Tianjin 300250China

Paste and mortar specimens were prepared with sulfoaluminate cement(SAC),P⋅O 42.5 ordinary Portland cement(OPC),and standard sand,and mixed and cured with pure water and artificial seawater,*** mechanical properties of mortar specimens were *** and microstructure of paste specimens were also investigated using X-ray diffraction(XRD),scanning electron microscope(SEM),and 27Al nuclear magnetic resonance(NMR),*** results indicate that SAC mortar samples mixed and cured by seawater have faster strength growth before 28 d and higher compressive strength than OPC mortar *** to curing in deionized water,the hydration products of SAC are somewhat coarser when cured in simulated *** evolution of aluminum phase hydration products during the hydration process of SAC mixed and cured in simulated seawater is quite different from that of *** 3 to 28 d,the content of each aluminum phase hydration product in SAC paste cured in simulated seawater changed little,while that in OPC paste changed significantly;for example,from 7 to 28 d,the content of ettringite(AFt)in OPC paste increased *** type of AFt formed loosely,harming the mortar's microstructure.

关键词： sulfoaluminate cement seawater mixing and curing 27Al NMR AFt

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NOTES ON THE LOG-MINKOWSKI INEQUALITY OF CURVATURE ENTROPY

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Acta mathematica Scientia 2025年第1期45卷 16-26页

作者： Deyi LI Lei ma Chunna zENG School of Science Wuhan University of Science and TechnologyWuhan430081China School of Sciences Guangdong Preschool Normal College in MaomingMaoming525200China School of mathematical Sciences Chongqing Normal UniversityChongqing401331China

An upper estimate of the new curvature entropy is provided,via the integral inequality of a concave *** two origin-symmetric convex bodies in R^(n),this bound is sharper than the log-Minkowski inequality of curvature ... 详细信息

关键词： convex bodies the log-Minkowski inequality curvature entropy the log-Minkowski inequality of curvature entropy

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bacillus CotA laccase improved the intestinal health,amino acid metabolism and hepatic metabolic capacity of Pekin ducks fed naturally contaminated AFb_(1)diet

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Journal of Animal Science and biotechnology 2025年第1期16卷 331-344页

作者： Mingxin ma Qianqian Wang Yanrong Liu Guiming Li Limeng Liu Gaigai Wang Yongpeng Guo Shimeng Huang Qiugang ma Cheng Ji Lihong zhao State Key Laboratory of Animal Nutrition and Feeding Poultry Nutrition and Feed Technology Innovation TeamCollege of Animal Science and TechnologyChina Agricultural UniversityNo.2.Yuanmingyuan West RoadBeijing 100193People’s Republic of China Poultry Institute Shandong Academy of Agricultural SciencesJinan 250100China College of Animal Science and Technology Henan Agricultural UniversityZhengzhou 450046China

background Aflatoxinb1(AFb_(1))is a prevalent contaminant in agricultural products,presenting significant risks to animal *** laccase from bacillus licheniformis has shown significant efficacy in degrading mycotoxins in vitro *** efficacy of bacillus CotA laccase in animals,however,remains to be confirmed.A 2×2 factorial design was used to investigate the effects of bacillus CotA laccase level(0 or 1 U/kg),AFb_(1) challenge(challenged or unchal-lenged)and their interactions on *** purpose of this study was to evaluate the efficacy of bacillus CotA laccase in alleviatingAFb_(1) toxicosis of *** bacillus CotA laccase alleviatedAFb_(1)-induced declines in growth performance of ducks accompanied by improved average daily gain(ADG)and lower feed/gain ratio(F/G).bacillus CotA laccase amelioratedAFb_(1)-induced gut barrier dysfunctions and inflammation testified by increasing the jejunal villi height/crypt depth ratio(VH/CD)and the mRNA expression of tight junction protein 1(TJP1)and zonula occluden-1(zO-1)as well as decreasing the expression of inflammation-related genes in the jejunum of *** acid metabolome showed that bacillus CotA laccase amelioratedAFb_(1)-induced amino acid metabolism disorders evidenced by increasing the level of glu-tamic acid in serum and upregulating the expression of amino acid transport related genes in jejunum of ***-lus CotA laccase amelioratedAFb_(1)-induced liver injury testified by suppressing oxidative stress,inhibiting apoptosis,and downregulating the expression of hepatic metabolic enzyme related genes of ***,bacillus CotA laccase degradedAFb_(1) in digestive tract of ducks,resulting in the reduced absorption level ofAFb_(1) across intestinal epithelium testified by the decreased level ofAFb_(1)-DNA adduct in the liver,and the reduced content ofAFb_(1) residues in liver and feces of *** bacillus CotA laccase effectively improved the growth performance,inte

关键词： AFb_(1)residue Aflatoxin bacillus CotA laccase Duck Intestinal barrier function Liver metabolic enzyme

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Sequence-controlled dynamic covalent units enable decoupling of mechanical and self-healing performance of polymers

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SCIENCE CHINA-CHEMISTRY 2025年第2期68卷 745-753页

作者： zhang, Luzhi Huang, Hongfei Sun, Lijie ma, Xiaopeng Tan, Hui You, zhengwei Shantou Univ Resp Dept Shenzhen Childrens Hosp Med Coll Shenzhen 518038 Peoples R China Donghua Univ Shanghai Key Lab Lightweight CompositeRes Base Te Coll Mat Sci & EngnChina Text Engn SocInst Funct State Key Lab Modificat Chem Fibers & Polymer Mat Shanghai 201620 Peoples R China Univ Elect Sci & Technol China Yangtze Delta Reg Inst Huzhou Huzhou 313001 Peoples R China

Sequence regulation provides an effective approach to controlling the properties of polymer materials. However, this approach remains an open question in the field of dynamic polymers, which emerge as more and more important new generation materials. Herein, we systematically investigate the effect of sequence control of dynamic covalent units in tuning the properties of materials. Different sequence-controlled poly(oxime-urethanes) are designed. The dynamic oxime-urethane groups are relatively dispersed (SCP-1) or concentrated (SCP-2) distributed in their molecular chains. The sequence control strategy provides an efficient way to decouple the mechanical and self-healing performance of polymers, which is one of the most pressing challenges in the field. The relatively dispersed oxime-urethane groups in SCP-1 not only facilitate the reorganization of the dynamic covalent bonds but also increase the probability of the reformation of hydrogen bonds. The reversible dissociation/reassociation of dynamic bonds is conducive to dissipating energy to enhance mechanical performance and promote self-healing properties. As a result, SCP-1 exhibits much faster self-healing than SCP-2, and its tensile strength is nearly twice that of SCP-2. In addition, energy dissipation capacity and degradation behavior also show significant sequence dependence. Overall, this work reveals a new molecular structure-property relationship and provides a powerful strategy to construct high-performance polymers.

关键词： sequence control dynamic polymer poly(oxime-urethane) strength polyurethane

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Advances in basic and translational research into nasopharyngeal carcinoma

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Oncology and Translational Medicine 2025年第1期11卷 10-16页

作者： zhe Li Yupei Chen Jun ma Department of Radiation Oncology State Key Laboratory of Oncology in South ChinaGuangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and TherapyGuangdong Provincial Clinical Research Center for CancerSun Yat-sen University Cancer CenterGuangzhouChina

According to the International Cancer Research Institute of the World Health Organization data,nasopharyngeal carcinoma(NPC)remains a significant health concern,particularly in regions such as Southeast Asia and southern ***,substantial progress has been made in the field of basic and translational research on NPC,enhancing our understanding of the molecular mechanisms underlying the disease and paving the way for precise therapeutic *** review summarizes the advances in NPC research,focusing on key areas that include radiotherapy and chemotherapy resistance and tumor metastasis,microenvironment,metabolism,microbiome,and ***,future research directions in NPC are discussed to provide valuable insights to advance the field further.

关键词： Nasopharyngeal carcinoma Treatment resistance Tumor biomarkers Tumor microenvironment

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Electronic modulation induced by coupling RuO2 with electron-donating Co3O4 for high-active and long-life rechargeable zn-air batteries

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Journal of Energy Chemistry 2025年第2期101卷 99-109页

作者： Xuena ma zhangxin Xu Mingyang Liu Panzhe Qiao Qi Li Ruihong Wang baojiang Jiang Key Laboratory of Functional Inorganic material Chemistry Ministry of Education of the People's Republic of China School of Chemistry and Materials ScienceHeilongjiang University Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences

Electronic-state modulation strategy offers great potential in designing RuO2-based bifunctionalelectrocatalysts for rechargeable zn-air batteries（zAbs）.Various three-dimensional（3D） transition metal oxides are attempted to couple with RuO2for constructing an appropriate Ru—O—M *** work aims to construct Co3O4-RuO2heterostructures on carbon sheets（Co3O4/RuO2/NCNS） for boosting electronic transfer and *** and theoretical calculations identify the electronic transfer from Co3O4to RuO2that modulates the electronic structure of metal surfaces/***,it leads to the increase in Co3+content,electron-rich state at RuO2surface and electronic accumulation at ***,this electronic-state modulation optimizes the d-band center in Co3O4/RuO2that lowers the reaction barriers and endows interfaces as the biggest contributor to oxygen reduction reaction（ORR） and oxygen evolution reaction（OER） performance,The Co3O4/RuO2/NCNS shows a quite low potential difference of 0.62 V and remarkable durability for ORR/***3O4/RuO2/NCNS-assembled zAbs exhibit an excellent specific capacity of 818.3 ma h g-1and a superior lifespan over 750 h.

关键词： Charge-discharge stability Co3O4-RuO2 heterostructure Electronic modulation Reaction energy barrier zn-air battery

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Near-perfect replication on amorphous alloys through active force modulation based on machine learning/neural network parameter prediction

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Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 177-187页

作者： Senkuan Meng zheng Wang Ruisong zhu Ruijie Liu Jiang ma Lina Hu Weihua Wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060China Songshan Lake materials Laboratory Dongguan 523808China Institute of Physics Chinese Academy of SciencesBeijing 100190China

As a microforming technique,micro/nano-structural replication possesses advantages of high precision and *** the remarkable superplasticity in the supercooled liquid region,amorphous alloys or metallic glasses(MGs)are regarded as ideal materials for miniature ***,due to the intrinsic metastable nature of supercooled liquids,the design of imprinting processes for MGs poses a *** the past,process parameters have largely relied on trial-and-error *** this work,a low-frequency active force modulation system is employed to apply a stable,precise,and real-time feedback stress field for imprinting of MG ***-frequency vibrations can facilitate the filling of microstructures on the template surface by reducing the effective viscosity of the supercooled *** the dataset composed of orthogonal experiments,a machine learning strategy based on back-propagation(bP)neural networks was utilized to construct a 3D parameter space for temperature,stress,and time,and to predict the corresponding filling ***,the optimal combination of imprinting process parameters was identified,and its filling ratio was experimentally validated to reach as high as *** near-perfect replication of microstructures confirms the superiority of the active force modulation system and the data-driven strategy of machine learning-assisted parameter *** the same time,this one-step microforming process provides a new approach to addressing the accuracy-cost trade-off dilemma in precision manufacturing.

关键词： metallic glass amorphous alloy microforming imprinting machine learning

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