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Insights into the long-term stability of landslide dams on the eastern margin of the Tibetan Plateau, China——A case study of the Diexi area

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Journal of Mountain Science 2023年第6期20卷 1674-1694页

作者： SONG Liang WANG Yun-sheng HU Dong-yu wu hao-chen TANG Tao LIU Shi-cheng State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China

Landslide dams,especially long-term stable landslide dams,have been recognized as important contributors to regional geomorphological ***,the Diexi area,a long-term stable dam-prone area located in upstream of the Minjiang River on the eastern Tibetan Plateau,was adopted to reveal reasons that landslide dams are concentrated in this area and maintain long-term stability via detailed field investigations,landslide dam sampling,unmanned aerial vehicle(UAV)images,and digital surface models(DSM).The results show the controlling factors that the slopes are prone to sliding and rock mass structure deterioration including lithological combination mode,slope structure,topographic conditions,a series of NNE-trending radial fissures and hydrological *** activities,which have caused many earthquakes,are the main inducing *** dams are prone to occurrence in the Diexi area owing to the combined effect of the narrow channels,the large landslide dam volume and the rock *** river flow,and the landslide dam volume,material,structure,and parameters control the stability of landslide *** landslide dam consists of various sizes of boulders and all landslide dams exhibit an obvious inverse grading sequence,and this size combination could consume most of the flow energy,and consequently protect the dam from ***,a total of seven knickpoints were formed by landslide dams,and the longitudinal gradient upstream of every landslide dam was found to decrease by the action of *** the eastern margin of the Tibetan Plateau,there are numerous landslide dams existed for hundreds or thousands of *** on the long-term stable landslide dams in the Diexi area could provide experience for studying similar kinds of landslide dams in this region.

关键词： Stable landslide dams Diexi area Arcuate tectonic belt Earthquake

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贸易保护能够促进本国经济增长吗?——基于威尔柯克斯秩和检验法

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云南财经大学学报 2017年第5期33卷 42-50页

作者：吴昊陈娟吉林大学东北亚研究中心长春130012 吉林大学东北亚研究院长春130012

2016年英国全民公投决定"退出欧盟"和美国新任总统特朗普宣布"退出TPP",让全球进入到贸易保护主义兴起的浪潮中。贸易保护主义通常认为,通过奖励出口、限制进口的方式增加净出口,实现贸易盈余,有利于本国出口企业增加产出和增加对国内... 详细信息

2016年英国全民公投决定"退出欧盟"和美国新任总统特朗普宣布"退出TPP",让全球进入到贸易保护主义兴起的浪潮中。贸易保护主义通常认为,通过奖励出口、限制进口的方式增加净出口,实现贸易盈余,有利于本国出口企业增加产出和增加对国内产品的需求,从而增加就业促进经济增长。然而,通过对全球217个国家近15年经济增长率和净出口的面板数据进行威尔柯克斯秩和检验,证实贸易保护既不能促进本国经济增长,也不能阻碍本国经济增长。

关键词：贸易保护经济增长国际贸易秩和检验

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基于分维数的土体裂隙表征单元体估算

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岩土力学 2013年第10期34卷 2774-2780页

作者：王媛冯迪陈尚星吴昊宸河海大学岩土力学与堤坝工程教育部重点实验室南京 210098 河海大学隧道与城市轨道工程研究所南京 210098 欧领特钢板桩(中国)有限公司上海 200122

由于干湿循环、剪切或其它作用,自然界土壤表面发育着大量裂隙。裂隙相互连接形成网络,裂隙网络是一个随机无序的系统,常规统计方法描述裂隙的分布特征存在很大的难度。网状土体裂隙一般具有分形特征,可以用分维数来进行描述。用数码相... 详细信息

由于干湿循环、剪切或其它作用,自然界土壤表面发育着大量裂隙。裂隙相互连接形成网络,裂隙网络是一个随机无序的系统,常规统计方法描述裂隙的分布特征存在很大的难度。网状土体裂隙一般具有分形特征,可以用分维数来进行描述。用数码相机拍摄土体表面的裂隙,将其转换成灰度图像,并结合分形理论,建立了摄影法测定土体裂隙分维数的方法,得到了土体裂隙的分维数。根据表征单元体的物理意义,建立了基于分维数估算表征单元体的方法,并对实例进行了分析。研究表明:分维数随裂隙密度,裂隙宽度和次一级裂隙发育程度的增大而增大;表征单元体与裂隙的密度均匀性和隙宽均匀性相关,基于分维数估算表征单元体的方法简便可行。

关键词：裂隙土分形摄影法分维数表征单元体(REV)

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The Clinicopathological Features,Treatment,and Prognosis of Postirradiation Osteosarcoma in Patients with Nasopharyngeal Cancer

The Clinicopathological Features,Treatment,and Prognosis of ...

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2005国际暨第八届全国头颈肿瘤大会

作者： LIU Wei-wei wu Qiu-liang wu Guo-hao chen Zhi-hua ZENG Zong-yuan

＜正＞ Objectives:Postirradiation osteosarcoma（PIOS）arising after radiation ofnasopharyngeal cancer（NPC）is rare and seldom *** aim of this articleis to report its clinicopathological features,outcome after treatment andprognosis. Study Design:Retrospective cohort ***:Fifteen patients with NPC were determined to have PIOS after reviewing 426patients with osteogenic *** clinical records,image and pathologicalslides,and follow-up data after treatment were collected to perform ***:The incidence rate of PIOS in NPC was about 0. 037%（15/40719）,which occupiedabout 3.5%（15/426）among all kinds of osteogenic *** onset time intervalof PIOS ranged from 4 to 27 years with a mean of 13.3 years after irradiation *** location where PIOS arose included 5 from maxilla,7 from mandible,and3 from a mixture of nasal cavity and paranasal *** tissue mass,bonedestruction and tumor new bone formation were the main characteristics in X-ray filmsand CT *** subtypes included 53.3%（8/15）of fibroblasticosteosarcoma,33.3%（5/15）of chondroblastic osteosarcoma and 13.3%（2/15）of mixedtype *** all patients with PIOS,9 patients received surgery alone,2 patients received surgery and postoperative chemotherapy using HD-MTX regimen,1 patient received surgery plus postoperative radiotherapy（dose 40 Gy）,and 3patients received palliative chemotherapy *** 12 patients undertaken ablativesurgery in curative aim,1 patient had residual tumor after surgery and 6 patientshad tumor recurrence from 5 to 19 months with a mean of 9 months after *** duration for all patients ranged from 7 to 41 months with a mean of 18 ***-Meier estimates of one-year and two-year survival rates in 15 patients withPIOS were 60% and 24% *** and tumor bone formation are thesignificant factors that can influence the ***:PIOS in NPC is a high malignant disease with poorer prognosis than

关键词： Radiation-induced neoplasms Osteosarcoma Nasopharyngeal neoplasms.

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Multi-layer multi-pass friction rolling additive manufacturing of Al alloy:Toward complex large-scale high-performance components

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 425-438页

作者： Haibin Liu Run Hou chenghao wu Ruishan Xie Shujun chen College of Mechanical&Energy Engineering Beijing University of TechnologyBeijing 100124China Chongqing Research Institute of Beijing University of Technology Chongqing 401121China

At present,the emerging solid-phase friction-based additive manufacturing technology,including friction rolling additive man-ufacturing(FRAM),can only manufacture simple single-pass *** this study,multi-layer multi-pass FRAM-deposited alumin-um alloy samples were successfully prepared using a non-shoulder tool *** material flow behavior and microstructure of the over-lapped zone between adjacent layers and passes during multi-layer multi-pass FRAM deposition were studied using the hybrid 6061 and 5052 aluminum *** results showed that a mechanical interlocking structure was formed between the adjacent layers and the adja-cent passes in the overlapped center *** friction and rolling of the tool head led to different degrees of lateral flow and plastic deformation of the materials in the overlapped zone,which made the recrystallization degree in the left and right edge zones of the over-lapped zone the highest,followed by the overlapped center zone and the non-overlapped *** tensile strength of the overlapped zone exceeded 90%of that of the single-pass deposition *** is proved that although there are uneven grooves on the surface of the over-lapping area during multi-layer and multi-pass deposition,they can be filled by the flow of materials during the deposition of the next lay-er,thus ensuring the dense microstructure and excellent mechanical properties of the overlapping *** multi-layer multi-pass FRAM deposition overcomes the limitation of deposition width and lays the foundation for the future deposition of large-scale high-performance components.

关键词： aluminum alloy additive manufacturing solid-state friction stir welding multi-layer multi-pass

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基于消息传递和图先验分布的微博主题模型

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软件学报 2024年第11期35卷 5133-5148页

作者：王浩成贺瑞芳吴辰昊刘焕宇天津大学智能与计算学部天津300350 天津市认知计算与应用重点实验室(天津大学) 天津300350

检测社交媒体文本中的潜在主题是一项有意义的任务.由于帖子具有表达简短、非正规的特点,其将带来严重的数据稀疏问题.不仅如此,基于变分自编码器(variational auto-encoder,VAE)的模型在主题推断过程中还忽视了用户间的社交关系,考虑VA... 详细信息

检测社交媒体文本中的潜在主题是一项有意义的任务.由于帖子具有表达简短、非正规的特点,其将带来严重的数据稀疏问题.不仅如此,基于变分自编码器(variational auto-encoder,VAE)的模型在主题推断过程中还忽视了用户间的社交关系,考虑VAE假设输入的数据点间是相互独立的.这导致了推断的潜在主题变量间缺少了相关性信息,进而导致主题不够连贯.社交网络结构信息不仅聚合上下文信息的线索,还暗示了用户间的主题相关性.因此,提出基于消息传递和图先验分布的微博主题模型,其借助图卷积网络(graph convolution network,GCN)编码更加丰富的上下文信息,并且在变分自编码器推断主题的过程中,通过图先验分布整合用户交互关系以促进对多数据点复杂关系的理解,从而更好地挖掘社交媒体主题信息.在3个真实微博数据集上的实验证明了所提方法的有效性.

关键词：社交媒体主题检测用户相关性图先验分布

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Ammonia pyrolysis oxidation excited by nanosecond pulsed discharge:Global/fluid models hybrid solution

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Journal of Energy Chemistry 2025年第1期100卷 385-396页

作者： Mingming Zhang Hanyu wu Qi chen Jiaxin Yang Bonan Liu School of Mechanical Electronic and Control Engineering Beijing Jiaotong University China University of Petroleum

The kinetic characteristics of plasma-assisted oxidative pyrolysis of ammonia are studied by using the global/fluid models hybrid solution ***,the stable products of plasma-assisted oxidative pyrolysis of ammonia are *** results show that the consumption of NH3/O2and the production of N2/H2change linearly with the increase of voltage,which indicates the decoupling of nonequilibrium molecular excitation and oxidative pyrolysis of ammonia at low ***,the detailed reaction kinetics mechanism of ammonia oxidative pyrolysis stimulated by a nanosecond pulse voltage at low pressure and room temperature is *** on the reaction path analysis,the simplified mechanism is *** detailed and simplified mechanism simulation results are compared with experimental data to verify the accuracy of the simplified ***,based on the simplified mechanism,the fluid model of ammonia oxidative pyrolysis stimulated by the nanosecond pulse plasma is established to study the pre-sheath/sheath behavior and the resultant consumption and formation of key *** results show that the generation,development,and propagation of the pre-sheath have a great influence on the formation and consumption of *** consumption of NH3by the cathode pre-sheath is greater than that by the anode pre-sheath,but the opposite is true for OH and O（1S）.However,within the sheath,almost all reactions do not ***,by changing the parameters of nanosecond pulse power supply voltage,it is found that the electron number density,electron current density,and applied peak voltages are not the direct reasons for the structural changes of the sheath and ***,the discharge interval has little effect on the sheath structure and gas mixture *** research results of this paper not only help to understand the kinetic promotion of non-equilibrium excitation in the process of oxidative pyrolysis but also help to explore th

关键词： Nanosecond pulsed discharge Ammonia Oxidative pyrolysis Fluid model Global model

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Effects of Cigarette Smoke Extract on E-cadherin Expression in Cultured Airway Epithelial Cells

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Journal of Huazhong University of Science and Technology(Medical Sciences) 2000年第1期20卷 32-35页

作者：王曦吴人亮郝天玲陈芳 Department of Pathology School of Basic Medical Sciences Tongji Medical University Wuhan Pulmonary Disease Laboratory Ministry of Health Tongji Medical University Wuhan

Summary: To investigate whether the change of E-cadherin (ECD) expression plays a role in the injury and repair of airway epithelial cells (AEC) caused by smoking, porcine AECs were cultured by using an enzyme-dispersed method. After exposure of the AECs to cigarette smoke extract (CSE), the ECD expression in the cells was detected by using immunocytochemistry and in situ hybridization. The results showed that ECD was distributed on the plasma membrane at the cell junctions of AECs. After exposure to 20 % CSE, the membranous ECD expression was decreased, the cytoplasmic ECD expression was increased (P<0.01) as the exposure time went on. But the content of ECD mRNA in the AECs did not chang. It suggests that the change of ECD ex- pression is regulated at the posttranslational level and plays a role in the injury and repair of AEC caused by smoking.

关键词： airway epithelial cell E-cadherin smoke inhalation injury

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A mild, configurable, flexible CoNi-LDH（v）/Zn battery based on H-vacancy-induced reversible Zn2+ intercalation

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Journal of Energy Chemistry 2025年第1期100卷 498-508页

作者： Xinyue cheng Dingsheng wu hao Gao Qingqing Wang Pengfei Lv Sam S.Yoon Qufu Wei Key Laboratory of Eco-textiles Ministry of Education Jiangnan University School of Mechanical Engineering Korea University

Flexible Zn-based batteries have attracted increasing research interest as essential components of wearable energy storage ***,the advancement of flexible aqueous Zn-based batteries based on Co-Ni layered double hydroxide （CoNi-LDH） as the cathode material is hampered by their poor cycling stability and the corrosiveness of alkaline ***,CoNi-LDH nanosheets enriched with H vacancies (CoNi-LDH（v）) were constructed on a flexible carbon cloth （CC） substrate via electrochemical deposition and *** Zn-based battery comprising CoNi-LDH（v）@CC as the cathode exhibited highly reversible conversion reactions and stable operation in 3 M ZnSO4electrolyte （pH=4）.The battery delivered an excellent specific capacity (225 mA h g-1,0.26 mA h cm-2),acceptable cycling stability（53.9%,900 cycles）,and high discharging *** abundant H vacancies served as active sites for the reversible intercalation of Zn2+and the extravasation of NO3-generated channels and space for Zn2+transport and storage,together enabling an excellent Zn2+storage ***,a sandwich-structured solid-state CoNi-LDH（v）@CC//Zn@CC battery was fabricated and was found to exhibit a noteworthy electrochemical performance and mechanical *** a proof of concept,the unencapsulated battery powered a digital watch under various deformation conditions and operated stably for 80 ***,the flexible battery displayed outstanding customizability,maintaining an open-circuit voltage of 1.42 V even after being cut *** proposed engineering strategy contributes to the realization of textiles with truly wearable energy-storage devices.

关键词： CoNi/Zn battery H vacancies Mild aqueous electrolyte Tailorable battery Wearable energy storage device

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Cell polarization in ischemic stroke: molecular mechanisms and advances

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Neural Regeneration Research 2025年第3期20卷 632-645页

作者： Yuanwei Li Xiaoxiao Xu Xuan wu Jiarui Li Shiling chen Danyang chen Gaigai Li Zhouping Tang Department of Neurology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina

Ischemic stroke is a cerebrovascular disease associated with high mortality and disability rates. Since the inflammation and immune response play a central role in driving ischemic damage, it becomes essential to modulate excessive inflammatory reactions to promote cell survival and facilitate tissue repair around the injury site. Various cell types are involved in the inflammatory response, including microglia, astrocytes, and neutrophils, each exhibiting distinct phenotypic profiles upon stimulation. They display either proinflammatory or anti-inflammatory states, a phenomenon known as ‘cell polarization.’ There are two cell polarization therapy strategies. The first involves inducing cells into a neuroprotective phenotype in vitro, then reintroducing them autologously. The second approach utilizes small molecular substances to directly affect cells in vivo. In this review, we elucidate the polarization dynamics of the three reactive cell populations(microglia, astrocytes, and neutrophils) in the context of ischemic stroke, and provide a comprehensive summary of the molecular mechanisms involved in their phenotypic switching. By unraveling the complexity of cell polarization, we hope to offer insights for future research on neuroinflammation and novel therapeutic strategies for ischemic stroke.

关键词： astrocyte polarization immune regulation inflammation ischemic injury microglia polarization neutrophil polarization signaling pathways stroke

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