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Integrating well logs, 3D seismic, and earthquake data for comprehensive prediction of 3D in-situ stress orientations: A case study from the Weiyuan area in the Sichuan Basin, China

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Petroleum Science 2025年第1期22卷 210-221页

作者： Huan Cao Yang Zhao Hai-Chao Chen le-le zhang Cheng-Gang Xian Ji-Dong Yang Lu Liu State Key Laboratory of Petroleum Resources and Engineering and Unconventional Petroleum Research Institute China University of Petroleum (Beijing) Department of Geophysics China University of Petroleum (East China) Aramco Beijing Research Center Aramco Asia

Determining the orientation of in-situ stresses is crucial for various geoscience and engineering applications. Conventional methods for estimating these stress orientations often depend on focal mechanism solutions(FMSs) derived from earthquake data and formation micro-imager(FMI) data from well ***, these techniques can be costly, depth-inaccurate, and may lack spatial coverage. To address this issue, we introduce the use of three-dimensional(3D) seismic data(active sources) as a lateral constraint to approximate the 3D stress orientation field. Recognizing that both stress and fracture patterns are closely related to seismic velocity anisotropy, we derive the orientation of azimuthal anisotropy from multi-azimuth 3D seismic data to compensate for the lack of spatial stress orientation information. We apply our proposed workflow to a case study in the Weiyuan area of the Sichuan Basin, China, a region targeted for shale gas production. By integrating diverse datasets, including 3D seismic, earthquakes, and well logs, we develop a comprehensive 3D model of in-situ stress(orientations and magnitudes). Our results demonstrate that the estimated anisotropy orientations from 3D seismic data are consistent with the direction of maximum horizontal principal stress(SHmax) obtained from FMIs. We analyzed 12earthquakes(magnitude > 3) recorded between 2016 and 2020 for their FMSs and compressional axis(Paxis) orientations. The derived SHmax direction from our 3D stress model is 110°ES(East-South), which shows excellent agreement with the FMSs(within 3.96°). This close alignment validates the reliability and precision of our integrated method for predicting 3D SHmax orientations.

关键词： In-situ stress orientation SHmax Azimuthal velocity anisotropy Focal source mechanism Formation micro-imager

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Development of ESIPT-based specific fluorescent probes for bioactive species based on the protection-deprotection of the hydroxyl

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Chinese Chemical letters 2025年第2期36卷 49-56页

作者： Haixian Ren Yuting Du Xiaojing Yang Fangjun Huo le zhang Caixia Yin Department of Chemistry Xinzhou Normal University Research Institute of Applied Chemistry Shanxi University Department of Chemistry The University of Texas at Austin Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province Institute of Molecular ScienceShanxi University

Excited-state intramolecular proton-transfer (ESIPT) based fluorescence probes are particularly attractive due to their unique properties including environmental sensitivity, a large Stokes shift, and potential for ratiometric sensing. In general, ESIPT-based fluorophore incorporates an intramolecular hydrogen bonding interaction between a hydrogen bond donor (–OH and NH2are common) and a hydrogen bond acceptor(C=N and C=O). More, protection–deprotection of hydroxyl group as hydrogen bond donor could induce an off-on switch of ESIPT-based emission. Therefore, protection–deprotection of hydroxyl group has been the widely used strategy to design fluorescent probes, where the potential key issue is selecting a protective group that can specifically leave in the presence of the target analyte. In this review, we mainly summarize the specific protecting groups (sites) and deprotection mechanisms for biologically important species (including reactive sulfur species (RSS), reactive oxygen species (ROS), enzymes, etc.), and analyze the advantages and disadvantages of different protection mechanisms from some aspects including probe stability, selectivity, response rate and assay system, etc. Based on the aforementioned, we further point out the current challenges and the potential future direction for developing ESIPT-based probes.

关键词： Bioimaging ESIPT Fluorescence probe Protection-deprotection Specificity

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Synthesis of intermetallic PtCo fuel cell catalysts from bimetallic core@shell structured nanoparticles

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Journal of Energy Chemistry 2025年第2期101卷 1-6页

作者： le zhang lei Tong Shuai Li Chang-Song Ma Kun-Ze Xue Hai-Wei Liang Hefei National Research Center for Physical Sciences at the Microscale Department of Chemistry University of Science and Technology of China

The high activity and stability of intermetallic PtCo nanocatalysts toward oxygen reduction reaction make them a top candidate as low-Pt cathode catalysts in proton exchange membrane fuel cells（PEMFCs）.However,forming intermetallic structures typically requires high-temperature annealing,posing a challenge for achieving well-size control and highly ordered *** we report the design and synthesis of bimetallic co re@shell structured precursors for affording high-performance intermetallic PtCo *** fabrication of the core@shell precursor involves using a molecular ligand containing both sulfur and oxygen donors to selectively bind with Pt colloidal nanoparticles as the core and chelate Co ions as the *** high-temperature annealing,the ligand transforms into carbon coatings around alloy nanoparticles,preventing particle sintering;meanwhile,Co ions in the shell can easily diffuse into the Pt core,which helps to increase the thermodynamic driving force for forming intermetallic *** benefits enable us to obtain the catalyst with finely dispersed nanoparticles（～3.5 nm）and a high ordering degree of 72%.With 0.1 mgPt/cm2cathode loading,the catalyst delivers superior performance and durability in PEMFCs,showing an initial mass activity of 0.56 A/mgPt,an initial power density of 1.05 W/cm2at 0.67 V（H2-air）,and a voltage loss of 26 mV at 0.8 A/cm2after the accelerated durability test.

关键词： Bimetallic structure Fuel cells Intermetallic PtCo Oxygen reduction reaction

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Synthesis ofδ-MnO_(2)via ozonation routine for low temperature formaldehyde removal

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Journal of Environmental Sciences 2025年第1期147卷 642-651页

作者： Guijun Fan Yacong Guo Shaohua Chai le zhang Jian Guan Guojun Ma Ning Han Yunfa Chen State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China College of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Science and Technology on Particle Materials Institute of Process EngineeringChinese Academy of SciencesBeijing 361021China Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Petrochemical Engineering&Environment Zhejiang Ocean UniversityZhoushan 316022China

Nowadays,it is still a challenge to prepared high efficiency and low cost formaldehyde(HCHO)removal catalysts in order to tackle the long-living indoor air ***,δ-MnO_(2)is successfully synthesized by a facile ozonation strategy,where Mn^(2+)is oxidized by ozone(O_(3))bubble in an alkaline *** presents one of the best catalytic properties with a low 100%conversion temperature of 85℃for 50 ppm of HCHO under a GHSV of 48,000 mL/(g·hr).As a comparison,more than 6 times far longer oxidation time is needed if O3 is replaced by O_(2).Characterizations show that ozonation process generates a different intermediate of tetragonalβ-HMnO_(2),which would favor the quick transformation into the final productδ-MnO_(2),as compared with the relatively more thermodynamically stable monoclinicγ-HMnO_(2)in the O_(2)***,HCHO is found to be decomposed into CO_(2)via formate,dioxymethylene and carbonate species as identified by room temperature insitu diffuse reflectance infrared fourier transform *** these results show great potency of this facile ozonation routine for the highly activeδ-MnO_(2)synthesis in order to remove the HCHO contamination.

关键词： δ-MnO_(2) Ozone oxidation HCHO oxidation In-situ DRIFTS

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Exotic hybrid pseudopotentials at finite temperature and chemical potential

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Chinese Physics C 2025年第1期49卷 186-194页

作者： le zhang Fei-Yang Cai Xun Chen College of Physics and Electronic Science Hubei Normal UniversityHuangshi 435002China

Using gauge/gravity duality,we studied the exotic hybrid pseudopotentials at finite temperature and chemical *** Σ hybrid meson can be described by a model including an object called"defect"on a string linking the quark and *** Σ_(u)^(-) hybrid potential at zero temperature and chemical potential was first proposed by Andreev and is perfectly *** this study,we extended the aforementioned model to finite chemical potential and compared the separate distance and pseudopotentials of Σ_(g)^(+) and Σ_(u)^(-).Unlike the Σ_(g)^(+) ground state,the Σ_(u)^(-),hybrid pseudopotentials no longer exhibit Coulomb-like behavior at short *** addition,temperature and chemical potential have a significant impact on the Σ_(u)^(-) hybrid *** screen distances and hybrid pseudopotentials of Σ_(u)^(-) significantly decrease when increasing temperature and chemical *** represented the melting diagram of Σ_(g)^(+) and Σ_(u)^(-) in the T-μ plane and confirmed that the quark-antiquark pair in Σ_(u)^(-) excited state is easier to melt than that in Σ_(g)^(+) ground state.

关键词： holographic QCD hybrid potential heavy quark

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Research landmarks on the 60th anniversary of Epstein-Barr virus

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Science China(Life Sciences) 2025年第2期68卷 354-380页

作者： Lan-Yi Zhong Chu Xie le-le zhang Yan-Lin Yang Yuan-Tao Liu Ge-Xin Zhao Guo-Long Bu Xian-Shu Tian Zi-Ying Jiang Bo-Yu Yuan Peng-Lin Li Pei-Huang Wu Wei-Hua Jia Christian Münz Benjamin E.Gewurz Qian Zhong Cong Sun Mu-Sheng Zeng State Key Laboratory of Oncology in South China Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and TherapyGuangdong Provincial Clinical Research Center for CancerSun Yat-sen University Cancer CenterGuangzhou 510060China Viral Immunobiology Institute of Experimental ImmunologyUniversity of ZürichZürich 8092Switzerland Division of Infectious Diseases Department of MedicineBrigham and Women’s HospitalBoston MA 02115USA Department of Microbiology Harvard Medical SchoolBoston MA 02115USA Harvard Program in Virology Boston MA 02115USA Broad Institute of Harvard and MIT Cambridge MA 02142USA

Epstein-Barr virus(EBV),the first human oncovirus discovered in 1964,has become a focal point in virology,immunology,and oncology because of its unique biological characteristics and significant role in human *** we commemorate the 60th anniversary of EBV's discovery,it is an opportune moment to reflect on the major advancements in our understanding of this complex *** this review,we highlight key milestones in EBV research,including its virion structure and life cycle,interactions with the host immune system,association with EBV-associated diseases,and targeted intervention strategies.

关键词： Epstein-Barr virus oncovirus immune response epidemiology vaccines antibodies

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考虑台风效应的金属屋面系统全寿命期疲劳损伤估计

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工程力学 2025年第1期42卷 189-198页

作者：宣颖张乐乐谢壮宁华南理工大学亚热带建筑科学国家重点实验室广州510640 中国建筑第二工程局有限公司华南公司深圳518048

评估金属屋面设计使用寿命年限内的累积损伤程度是抗风设计的重要环节,该文提出一种用于台风多发区域金属屋面系统全寿命期风致疲劳损伤的估计方法,该方法结合风洞测压试验数据和基于台风MonteCarlo模拟所得风速风向分布模型,采用有限... 详细信息

评估金属屋面设计使用寿命年限内的累积损伤程度是抗风设计的重要环节,该文提出一种用于台风多发区域金属屋面系统全寿命期风致疲劳损伤的估计方法,该方法结合风洞测压试验数据和基于台风MonteCarlo模拟所得风速风向分布模型,采用有限元数值模拟方法进行荷载应力分析,提取金属屋面板块疲劳热点处荷载应力关系,从而获得应力时程数据,通过雨流计数法统计应力循环数,并根据Goodman应力修正法则和Miner疲劳线性累积损伤理论,计算得到金属屋面系统在全寿命期的疲劳累积损伤情况;利用台风等效序列进行加载,以动态物理压力箱试验验证数值模拟方法有效性为基础,将该文方法应用于位于东南沿海的某大跨度圆柱形金属屋面的疲劳累积损伤估计。结果显示:金属屋面全寿命期风致疲劳损伤不仅与风压分布存在一定相关性,也与建筑物所在地区的极值风速分布和主导风向存在相关性,评估全寿命期风致疲劳损伤应结合风洞测压试验结果和建筑物所在地风速风向分布模型进行综合分析;对于更易出现疲劳破坏的屋面角区和边缘部位的高负压区域,量化分析局部加密角区和边缘部位檩距对风致疲劳损伤的影响。

关键词：金属屋面板有限元分析风洞试验风致疲劳损伤台风模型

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城乡融合发展:中国城市化进程中空间治理的新议题及其推进理路

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内蒙古社会科学 2025年第1期46卷 40-47页

作者：任维德张乐内蒙古大学公共管理学院内蒙古呼和浩特010021 内蒙古社会治理与创新研究基地内蒙古呼和浩特010070

改革开放以来,中国政府通过撤地设市、地市合并、撤县设市、撤县(市)设区、市辖区调整、乡镇撤并以及地级市代管县(市)等行政区划调整,运用城市与区域空间治理的多种政策工具,以城市空间的增量与重构激发城市化发展动力,推动经济、社会... 详细信息

改革开放以来,中国政府通过撤地设市、地市合并、撤县设市、撤县(市)设区、市辖区调整、乡镇撤并以及地级市代管县(市)等行政区划调整,运用城市与区域空间治理的多种政策工具,以城市空间的增量与重构激发城市化发展动力,推动经济、社会的发展与现代化。城乡融合发展是中国式现代化的必然要求,是统筹推进新型城镇化的重要途径,已成为中国城市化进程中空间治理的新议题。基于此,有必要对城乡融合发展的多重逻辑、推进理路展开深入探讨,这对于破解城乡发展差距、实现共同富裕的意义十分重大。

关键词：城乡融合发展城市化进程空间治理空间增量

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YOLOX-SwinT algorithm improves the accuracy of AO/OTA classification of intertrochanteric fractures by orthopedic trauma surgeons

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Chinese Journal of Traumatology 2025年第1期28卷 69-75页

作者： Xue-Si Liu Rui Nie Ao-Wen Duan Li Yang Xiang Li le-Tian zhang Guang-Kuo Guo Qing-Shan Guo Dong-Chu Zhao Yang Li He-Hua zhang Department of Medical Engineering Daping HospitalArmy Medical UniversityChongqing400042China Department of Information Southwest HospitalArmy Medical UniversityChongqing400038China Department of Radiology Daping HospitalArmy Medical UniversityChongqing400042China Division of Trauma and War Injury Daping HospitalArmy Medical University of PLAState Key Laboratory of Trauma and Chemical PoisoningChongqing400042China

Purpose:Intertrochanteric fracture(ITF)classification is crucial for surgical ***,orthopedic trauma surgeons have shown lower accuracy in ITF classification than *** objective of this study was to utilize an artificial intelligence(AI)method to improve the accuracy of ITF ***:We trained a network called YOLOX-SwinT,which is based on the You Only Look Once X(YOLOX)object detection network with Swin Transformer(SwinT)as the backbone architecture,using 762 radiographic ITF examinations as the training ***,we recruited 5 senior orthopedic trauma surgeons(SOTS)and 5 junior orthopedic trauma surgeons(JOTS)to classify the 85 original images in the test set,as well as the images with the prediction results of the network model in *** analysis was performed using the SPSS 20.0(IBM Corp.,Armonk,NY,USA)to compare the differences among the SOTS,JOTS,SOTS+AI,JOTS+AI,SOTS+JOTS,and SOTS+JOTS+AI *** images were classified according to the AO/OTA 2018 classification system by 2 experienced trauma surgeons and verified by another expert in this *** on the actual clinical needs,after discussion,we integrated 8 subgroups into 5 new subgroups,and the dataset was divided into training,validation,and test sets by the ratio of 8:1:***:The mean average precision at the intersection over union(IoU)of 0.5(mAP50)for subgroup detection reached 90.29%.The classification accuracy values of SOTS,JOTS,SOTS+AI,and JOTS+AI groups were 56.24%±4.02%,35.29%±18.07%,79.53%±7.14%,and 71.53%±5.22%,*** paired t-test results showed that the difference between the SOTS and SOTS+AI groups was statistically significant,as well as the difference between the JOTS and JOTS+AI groups,and the SOTS+JOTS and SOTS+JOTS+AI ***,the difference between the SOTS+JOTS and SOTS+JOTS+AI groups in each subgroup was statistically significant,with all ples t-test results showed that

关键词： Artificial intelligence Intertrochanteric fracture Fracture classification Assist diagnosis YOLOX Swin transformer

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选区激光熔化SiC颗粒增强AlMgScZr复合材料的微观组织与力学性能

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华南理工大学学报(自然科学版) 2025年第1期53卷 118-128页

作者：马国楠张乐欧阳史利军鲁仁义程英晔陈越中国兵器科学研究院宁波分院浙江宁波315100 东莞材料基因高等理工研究院广东东莞523808 内蒙金属材料研究所内蒙古包头014034 沈阳飞机工业(集团)有限公司辽宁沈阳110850

铝基复合材料具有硬度高、切削加工难度大的特点。为了实现高比强度、高比模量铝基复合材料的近净成形,该文利用激光增材制造技术制备了10%(体积分数)微米级SiC颗粒增强AlMgScZr复合材料,建立了激光能量密度、扫描速率与复合材料成形质... 详细信息

铝基复合材料具有硬度高、切削加工难度大的特点。为了实现高比强度、高比模量铝基复合材料的近净成形,该文利用激光增材制造技术制备了10%(体积分数)微米级SiC颗粒增强AlMgScZr复合材料,建立了激光能量密度、扫描速率与复合材料成形质量的对应关系,通过光学显微镜(OM)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射仪(XRD)和万能试验机对微观组织和力学性能进行表征和测试,探讨了微米级SiC颗粒对选区激光熔化(SLM)成形铝基复合材料凝固组织和力学性能的作用机理。结果表明:在铺粉层厚为30μm、扫描间距为0.12mm、激光功率为260W、扫描速率为1000mm/s的工艺参数下,可获得成形质量最佳的SiC/AlMgScZr复合材料,其致密度可达99.81%;激光熔覆过程中,SiC颗粒与Al基体之间发生了剧烈的界面反应,SiC颗粒尖角明显钝化,原位生成的微米级针状Al4SiC4条带与残余SiC颗粒形成混合增强结构;时效态SiC/AlMgScZr复合材料的抗拉强度为379MPa、延伸率为12%、弹性模量为84 GPa,其断裂形式为Al基体的韧性断裂和Al4SiC4相的脆性解理断裂,大量交错分布的针状Al4SiC4条带是材料发生过早失效断裂的主控因素。

关键词：选区激光熔化铝基复合材料工艺参数界面反应断裂行为

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