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Development and Deformation Characteristics of Large Ancient Landslides in the Intensely Hazardous Xiongba-Sela Section of the Jinsha River, Eastern Tibetan Plateau, China

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Journal of Earth Science 2024年第3期35卷 980-997页

作者： Yiqiu Yan Changbao Guo yanan zhang Zhendong Qiu Caihong Li Xue Li Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Laboratory of Active Tectonics and Geological Safety Ministry of Natural ResourcesBeijing 100081China

The upstream Jinsha River,located in the eastern Tibetan Plateau,has been experiencing intense geological hazards characterized by a high density of ancient landslides,significant deformation and reactivation *** this study,remote sensing interpretation,field investigations,and Small Baseline Subset Interferometric Synthetic Aperture Radar(SBAS-InSAR)technologies have been *** a 17 km stretch of the Jinsha River,specifically in the Xiongba-Sela segment,16 large-scale ancient landslides were identified,9 of which are currently undergoing creeping ***,the Sela and Xiongba ancient landslides exhibit significant deformation,with a maximum deformation rate of-192 mm/yr,indicating a high level of sliding *** volume of the Sela ancient landslide is estimated to be 1.8×108 to 4.5×108 m3,and characterized by extensive fissures and long-term creeping *** SBAS-InSAR results revealed significant spatial variations in the deformation of the Sela ancient landslide,generally displaying two secondary zones of intense deformation,and landslide deformation exhibits nonlinear behavior with *** January 2016 and February 2022,Zone III1 on the southwest side of the Sela ancient landslide,experienced a maximum cumulative deformation of-857 mm,with a maximum deformation rate of-108 mm/*** III2,on the northeast side of the Sela ancient landslide,the maximum cumulative deformation was-456 mm,with a maximum deformation rate of-74 mm/yr;among these,the H2 and H4 secondary bodies on the south side of III1 are in the accelerative deformation stage and at the Warn warning *** propose that the large-scale flood and debris flow disasters triggered by the Baige landslide-dammed lake-dam broken disaster chain in Tibetan Plateau during October and November 2018 caused severe erosion at the foot of downstream *** far-field triggering effect accelerated the creep of the downstream ancient ***,the defo

关键词： Jinsha River SBAS-InSAR landslides surface deformation disasters.

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The Application of Extended Reality in Treating Children with Autism Spectrum Disorder

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Neuroscience Bulletin 2024年第8期40卷 1189-1204页

作者： Weijia Zhao Song Xu yanan zhang Dandan Li Chunyan Zhu Kai Wang First Clinical Medical College Anhui Medical UniversityHefei 230032China School of Biomedical Engineering Anhui Medical UniversityHefei 230032China School of Mental Health and Psychological Sciences Anhui Medical UniversityChinaHefei 230032China Research Center for Translational Medicine The Second Hospital of Anhui Medical UniversityHefei 230000China Department of Neurology The First Affiliated Hospital of Anhui Medical UniversityHefei 230032China Collaborative Innovation Center of Neuropsychiatric Disorders and Mental Health Hefei 230032China Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefei 230088China Anhui Province Key Laboratory of Cognition and Neuropsychiatric Disorders Hefei 230032China

Autism Spectrum Disorder(ASD)is a common neurodevelopmental disorder in children,characterized by social interaction,communication difficulties,and repetitive and stereotyped *** intervention methods have limitations,such as requiring long treatment periods and needing to be more convenient to *** Reality(XR)technology offers a virtual environment to enhance children's social,communication,and self-regulation *** paper compares XR theoretical models,application examples,and intervention *** study reveals that XR intervention therapy is mainly based on cognitive rehabilitation,teaching,and social-emotional learning *** utilizes algorithms,models,artificial intelligence(AI),eye-tracking,and other technologies for interaction,achieving diverse intervention *** showed effective improvement in competency barriers using XR-based multimodal interactive ***,Mixed Reality(MR)technology still requires further *** research should explore multimsodal interaction technologies combining XR and AI,optimize models,prioritize the development of MR intervention scenarios,and sustain an optimal intervention level.

关键词： Autism spectrum disorde Extended reality Multimodal interaction technologies Intervention model Treatment effectiveness evaluation

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Study on the Impact of Massive Refracturing on the Fracture Network in Tight Oil Reservoir Horizontal Wells

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Fluid Dynamics & Materials Processing 2024年第5期20卷 1147-1163页

作者： Jianchao Shi yanan zhang Wantao Liu Yuliang Su Jian Shi Exploration and Development Research Institute Changqing Oilfield CompanyXi’an710018China National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields Xi’an710018China Key Laboratory of Unconventional Oil and Gas Development(China University of Petroleum(East China)) Ministry of EducationQingdao266580China

Class III tight oil reservoirs have low porosity and permeability,which are often responsible for low production rates and limited *** repeated fracturing is a well-known technique to fix some of these *** such methods,existing fractures are refractured,and/or new fractures are created to facilitate communication with natural *** study explored how different refracturing methods affect horizontal well fracture networks,with a special focus on morphology and related fluid flow *** particular,the study relied on the unconventional fracture model(UFM).The evolution of fracture morphology and flow field after the initial fracturing were analyzed *** simulation results indicated that increased formation energy and reduced reservoir stress differences can promote fracture *** was shown that the length of the fracture network,the width of the fracture network,and the complexity of the fracture can be improved,the oil drainage area can be increased,the distance of oil and gas seepage can be reduced,and the production of a single well can be significantly increased.

关键词： Type III tight oil reservoirs refracturing methods horizontal wells fracture network study fracture network evolution

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Effect of burial depth of a new tunnel on the seismic response of an existing tunnel

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Earthquake Engineering and Engineering Vibration 2024年第4期23卷 863-882页

作者： Ma, Runbo Cao, Qikun Lu, Shasha Zhao, Dongxu zhang, yanan Xu, Hong College of Civil Engineering Liaoning Technical University Fuxin China Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of Technology Beijing China

Burial depth is a crucial factor affecting the forces and deformation of tunnels during earthquakes. One key issue is a lack of understanding of the effect of a change in the buried depth of a single-side tunnel on the seismic response of a double-tunnel system. In this study, shaking table tests were designed and performed based on a tunnel under construction in Dalian, China. Numerical models were established using the equivalent linear method combined with ABAQUS finite element software to analyze the seismic response of the interacting system. The results showed that the amplification coefficient of the soil acceleration did not change evidently with the burial depth of the new tunnel but decreased as the seismic amplitude increased. In addition, the existing tunnel acceleration, earth pressure, and internal force were hardly affected by the change in the burial depth; for the new tunnel, the acceleration and internal force decreased as the burial depth increased, while the earth pressure increased. This shows that the earth pressure distribution in a double-tunnel system is relatively complex and mainly concentrated on the arch spandrel and arch springing of the relative area. Overall, when the horizontal clearance between the center of the two tunnels was more than twice the sum of the radius of the outer edges of the two tunnels, the change in the burial depth of the new tunnel had little effect on the existing one, and the tunnel structure was deemed safe. These results provide a preliminary understanding and reference for the seismic performance of a double-tunnel system.

关键词： burial depth new tunnel existing tunnel seismic response shaking table tests numerical simulations

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Characterization and spatial analysis of coseismic landslides triggered by the Luding Ms 6.8 earthquake in the Xianshuihe fault zone, Southwest China

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Journal of Mountain Science 2024年第1期21卷 160-181页

作者： GUO Changbao LI Caihong YANG Zhihua NI Jiawei ZHONG Ning WANG Meng YAN Yiqiu SONG Deguang zhang yanan zhang Xianbing WU Ruian CAO Shichao SHAO Weiwei Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Laboratory of Active Tectonics and Geological Safety Ministry of Natural ResourcesBeijing 100081China Research Center of Neotectonism and Crustal Stability China Geological SurveyBeijing 100081China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China Sichuan Institute of Geological Survey Chengdu 610081China

On September 5, 2022, a magnitude Ms 6.8 earthquake occurred along the Moxi fault in the southern part of the Xianshuihe fault zone located in the southeastern margin of the Tibetan Plateau,resulting in severe damage and substantial economic loss. In this study, we established a coseismic landslide database triggered by Luding Ms 6.8 earthquake, which includes 4794 landslides with a total area of 46.79 km^(2). The coseismic landslides primarily consisted of medium and small-sized landslides, characterized by shallow surface sliding. Some exhibited characteristics of high-position initiation resulted in the obstruction or partial obstruction of rivers, leading to the formation of dammed lakes. Our research found that the coseismic landslides were predominantly observed on slopes ranging from 30° to 50°, occurring at between 1000 m and 2500 m, with slope aspects varying from 90° to 180°. Landslides were also highly developed in granitic bodies that had experienced structural fracturing and strong-tomoderate weathering. Coseismic landslides concentrated within a 6 km range on both sides of the Xianshuihe and Daduhe fault zones. The area and number of coseismic landslides exhibited a negative correlation with the distance to fault lines, road networks, and river systems, as they were influenced by fault activity, road excavation, and river erosion. The coseismic landslides were mainly distributed in the southeastern region of the epicenter, exhibiting relatively concentrated patterns within the IX-degree zones such as Moxi Town, Wandong River basin, Detuo Town to Wanggangping Township. Our research findings provide important data on the coseismic landslides triggered by the Luding Ms 6.8 earthquake and reveal the spatial distribution patterns of these landslides. These findings can serve as important references for risk mitigation, reconstruction planning, and regional earthquake disaster research in the earthquake-affected area.

关键词： Luding earthquake Coseismic landslides Remote sensing interpretation Spatial distribution Xianshuihe fault Earthquake fault

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Two Case Studies of Painless Thyroiditis with Special Presentation

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Proceedings of Anticancer Research 2024年第3期8卷 97-103页

作者： yanan zhang Zhaoshun Jiang Hospital 960 Joint Logistic Support ForceJinan 250000China

This article reports two cases of painless thyroiditis with special manifestations. Patient 1 was a 76-year-old female patient who presented with palpitations and chest tightness and was diagnosed with hyperthyroidism by thyroid ultrasound and electrocardiogram, which is a painless thyroiditis with atrial fibrillation as the first symptom. Patient 2 is a 44-year-old male patient, with only palpitations, diagnosed as T3 thyroiditis by liver function and thyroid function tests, and accompanied by abnormal liver function, belonging to the painless thyroiditis with elevated FT3 only. This article points out that painless thyroiditis has multiple manifestations and is easily misdiagnosed as other diseases. Therefore, patients with symptoms such as palpitations and chest tightness should undergo cytologic or pathologic examination in time to avoid missed diagnosis and misdiagnosis.

关键词： Painless thyroiditis Atrial fibrillation Elevated FT3

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Influence of span-to-depth ratio on dynamic response of vehicle-turnoutbridge system in high-speed railway

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High-Speed Railway 2024年第1期2卷 30-41页

作者： Chuanqing Dai Tao Xin Shenlu Qiao yanan zhang Pengsong Wang Mahantesh M.Nadakatti School of Civil Engineering Beijing Jiaotong UniversityBeijing 100044China China Railway Engineering Design and Consulting Group Co. Ltd.Beijing 100070China Karnatak Law Society’s Gogte Institute of Technology Belagavi 590006India

For high-speed railways,the smoothness of the railway line significantly affects the operational speed of *** the train passes through the turnout on a long-span bridge,the wheel-rail impacts caused by the turnout structure irregularities,and the instability arising from the bridge's flexural deformation lead to a strong coupling effect in the vehicle-turnout-bridge *** significantly affects both ride comfort and operational *** addressing this issue,the present study considered a long-span continuous rigid-frame bridge as an example and established a train-turnout-bridge coupled dynamic model of high-speed *** a selfdeveloped dynamic simulation program,the study analysed the dynamic response characteristics when the train passes through the turnouts on the *** also investigated the influence of different span-to-depth ratios of the bridge on the vehicle dynamic response when the train passes through the main line and branch line of turnouts and then proposed a span-to-depth ratio limit value for a long-span continuous rigid-frame *** research findings suggest that the changes in the span-to-depth ratio have a relatively minor impact on the train’s operational performance but significantly affect the dynamic characteristics of the bridge *** on the findings and a comprehensive assessment of safety indicators,it is advisable to establish a span-to-depth ratio limit of 1/4500 for a long-span continuous rigid-frame bridge.

关键词： Turnout on bridge Span-to-depth ratio Dynamic response Vehicle-turnout-bridge system High-speed railway

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Effect of burial depth of a new tunnel on the seismic response of an existing tunnel

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Earthquake Engineering and Engineering Vibration 2024年第04期 863-882页

作者： Ma Runbo Cao Qikun Lu Shasha Zhao Dongxu zhang yanan Xu Hong College of Civil Engineering Liaoning Technical University Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of Technology

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Fermi Surface Nesting with Heavy Quasiparticles in the Locally Noncentrosymmetric Superconductor CeRh2As2

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Chinese Physics Letters 2024年第9期41卷 107-121页

作者： Yi Wu Yongjun zhang Sailong Ju Yong Hu Yanen Huang yanan zhang Huali zhang Hao Zheng Guowei Yang Evrard-Ouicem Eljaouhari Baopeng Song Nicholas C.Plumb Frank Steglich Ming Shi Gertrud Zwicknagl Chao Cao Huiqiu Yuan Yang Liu Center for Correlated Matter and School of Physics Zhejiang UniversityHangzhou 310058China Institute for Advanced Materials Hubei Normal UniversityHuangshi 435002China Swiss Light Source Paul Scherrer InstitutCH-5232 Villigen PSISwitzerland Institut for Mathematische Physik 38106 BraunschweigGermany Max Planck Institute for Chemical Physics of Solids 01187 DresdenGermany Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China State Key Laboratory of Silicon Materials Zhejiang UniversityHangzhou 310058China

The locally noncentrosymmetric heavy fermion superconductor CeRh2As2 has attracted considerable interests due to its rich superconducting phases,accompanied by possible quadrupole density wave and pronounced antiferromagnetic *** understand the underlying physics,here we report measurements from highresolution angle-resolved *** results reveal fine splittings of the conduction bands related to the locally noncentrosymmetric structure,as well as a quasi-two-dimensional Fermi surface(FS)with strong 4𝑓*** FS shows signs of nesting with an in-plane vector q1=(π/α,π/α),which is facilitated by the heavy bands nearˉ𝑋arising from the characteristic conduction-X *** FS nesting provides a natural explanation for the observed antiferromagnetic spin fluctuations at(π/α,π/α),which might be the driving force for its unconventional *** experimental results can be reasonably explained by density functional theory plus dynamical mean field theory calculations,which can capture the strong correlation *** study not only provides spectroscopic signature of the key factors underlying the field-induced superconducting transition,but also uncovers the critical role of FS nesting and lattice Kondo effect in the underlying magnetic fluctuations.

关键词： symmetric Fermi conduction

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Diagnose and treatment for Type D congenital esophageal atresia with tracheoesophageal fistula

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Pediatric Investigation 2024年第1期8卷 37-43页

作者： Dingding Wang Yong Zhao yanan zhang Kaiyun Hua Yichao Gu Shuangshuang Li Junmin Liao Shen Yang Ting Yang Jiawei Zhao Jinshi Huang Department of Neonatal Surgery Beijing Children’s HospitalCapital Medical UniversityNational Center for Children’s HealthBeijingChina

Importance:Type D esophageal atresia(EA)with tracheoesophageal fistula(TEF)is characterized by EA with both proximal and distal *** is a rare congenital anomaly with a very low ***:To investigate diagnostic and treatment strategies for this rare ***:We retrospectively reviewed the clinicopathological features of patients with EA/TEF treated at our institution between January 2007 and September ***:Among 386 patients with EA/TEF,14(3.6%)had type D EA/*** two patients were diagnosed with proximal TEF *** patients were diagnosed *** patients were missed for diagnosis during the initial surgery but was later confirmed by *** the neonatal period,seven patients underwent a one-stage repair of proximal and distal TEF via thoracoscopy or *** to missed diagnosis and other reasons,the other 7 patients underwent two-stage surgery for repair of the proximal TEF,including cervical incision and *** of the 14 patients experienced postoperative complications including anastomotic leakage,pneumothorax,esophageal stricture,and *** who underwent one-stage repair of distal and proximal TEF during the neonatal period showed a higher incidence of anastomotic leak(4/7).In contrast,only one of seven patients with two-stage repair of the proximal TEF developed an anastomotic ***:Type D EA/TEF is a rare condition,and proximal TEFs are easily *** may aim to diagnose and determine the correct surgical approach.A cervical approach may be more suitable for repairing the proximal TEF.

关键词： Diagnosis Therapy Tracheoesophageal fistula Type D congenital esophageal atresia

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