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Modeling of breaching parameters for debris flow dams

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Journal of Mountain Science 2023年第10期20卷 2835-2851页

作者： ruan He-chun chen Hua-yong chen Xiao-qing ZHAO Wan-yu chen jian-gang WANG Tao jianG yao Wang Xi-an Li Xiang-ning LI Xiao YU Yun-han Key Laboratory of Mountain Hazards and Surface Processes Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100000China

The debris flow dam is a common type of barrier dams,which shows significant differences from other types of barrier dam such as landslide dam,moraine dam in their formation processes,dam body shapes,and internal *** basic breaching parameters such as flood peak discharge are vital indicators of risk *** this study,we elucidated the failure process of the debris flow dam through the flume experiment,and built the calculation equation of the breaching parameters by selecting critical *** result shows that the overtopping failure process of the debris flow dam is capable of forming significantly retrogressive scarps,and the failure process experiences three stages,the formation of the retrogressive scarp,the erosion of the retrogressive scarp,and the decline of the retrogressive *** factors used for establishing the calculation equations for peak discharge(Qp),final width(Wb)of the breach,and duration(T)of the debris flow dam failure are dam height(h),reservoir capacity(V),the fine grain content(P0.075)of the soil,the nonuniformity coefficient(Cu)of the soil,and the upper limit grain size(D90)of the soil,*** the three equations,the correlation coefficients between Qp,Wb,T and the five factors were 0.86,0.70,0.63,*** equations still need to be modified and verified in actual cases.

关键词： Debris flow dams Overtopping failure Breaching g parameters Peak discharge Flume experiment

A Non-isocyanate Route to Poly(ester urethane) with High Molecular Weight: Synthesis and Effect of Chemical Structures of Polyester-diol

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Chinese Journal of Polymer Science 2022年第1期40卷 75-84页

作者： Zi-Yun Shen Qi-yong Mei Yi Liu Liu-chun Zheng chun-cheng Li Jia-jian Liu yao-Nan Xiao Shao-Hua Wu bo Zhang Beijing National Laboratory for Molecular Sciences Key Laboratory of Engineering PlasticsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Department of Neurosurgery Changzheng Hospitalthe Second Military Medical UniversityShanghai 200003China School of Textile Science and Engineering Tiangong UniversityTianjin 300387China

A series of non-isocyanate linear high molecular weight poly(ester urethane)s(PETUs)were prepared through an environmentallyfriendly route based on dimethyl carbonate,1,6-hexanediol and 1,*** this route,the polyurethane diol was first prepared by the reaction between bis-1,6-hexamethylencarbamate(BHC)and 1,6-hexanediol.A series of polyester soft segments of polyurethane have been synthesized from the polycondensation of adipic acid and different diols,including butanediol,hexanediol,octanediol and *** subsequent polycondensation of polyurethane diol and polyester diol led to linear *** resultant polymers were characterized by GPC,FTIR,^(1)H-NMR,^(13)C-NMR,DSC,WAXD,TGA and tensile *** results indicated that PETUs possess weight-average molecular weights higher than 1×10^(5) and the tensile strength as high as 10 *** thermal properties,crystallization behavior,microphase separation behavior and morphology were studied by DSC and AFM,and the results indicated that the degree of phase separation was affected by two factors,the crystallization and hydrogen bonding interaction between soft segment and hard segment.

关键词： Non-isocyanate Poly(ester urethane) Polyester-diol

重楼总皂苷诱导乳腺癌MCF-7细胞铁死亡抗肿瘤机制研究

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中国中药杂志 2024年第9期49卷 2385-2392页

作者：张艺博张慧中阮意丹张永强张萍芝姚爱娜李诗曼徐晓涵倪健董晓旭北京中医药大学中药学院北京102488

探讨重楼总皂苷诱导乳腺癌MCF-7细胞的铁死亡作用及机制,为重楼总皂苷临床治疗乳腺癌提供理论依据。通过噻唑蓝(methyl thiazolyl tetrazolium,MTT)实验检测不同浓度重楼总皂苷对MCF-7细胞增殖能力的影响;倒置显微镜观察MCF-7细胞形态改... 详细信息

探讨重楼总皂苷诱导乳腺癌MCF-7细胞的铁死亡作用及机制,为重楼总皂苷临床治疗乳腺癌提供理论依据。通过噻唑蓝(methyl thiazolyl tetrazolium,MTT)实验检测不同浓度重楼总皂苷对MCF-7细胞增殖能力的影响;倒置显微镜观察MCF-7细胞形态改变;平板克隆实验检测MCF-7细胞克隆形成能力;乳酸脱氢酶(lactate dehydrogenase,LDH)释放实验检测MCF-7细胞膜的完整性;划痕实验检测MCF-7细胞迁移能力;利用荧光倒置显微镜检测MCF-7细胞中活性氧(reactive oxygen species,ROS)的水平,利用试剂盒检测MCF-7细胞中Fe2+的含量;透射电镜观察MCF-7细胞线粒体超微结构;采用Western blot检测重楼总皂苷对MCF-7细胞中p53、溶质载体家族7成员11(solute carrier family 7 member 11,SLC7A11)、谷胱甘肽过氧化物酶4(glutathione peroxidase 4,GPX4)、酰基辅酶A合成酶长链家族成员4(acyl-CoA synthetase long-chain family member 4,ACSL4)、转铁蛋白受体1(transferrin receptor protein 1,TFR1)表达的影响。结果显示,1.5、3、4.5、6、7.5、9μg·mL^(-1)重楼总皂苷均能显著抑制MCF-7细胞增殖,IC50为4.12μg·mL^(-1),对细胞形态有明显的损伤,导致细胞形成空泡,逐渐皱缩并脱落;抑制MCF-7细胞的克隆形成能力,破坏细胞膜促使细胞内LDH释放,缩短MCF-7细胞的迁移距离抑制迁移能力;显著提高MCF-7细胞中ROS的含量,诱导细胞氧化损伤,导致细胞内Fe^(2+)堆积,线粒体结构也发生明显的改变,线粒体膜密度增加,嵴减少甚至消失;促进p53蛋白表达,下调SLC7A11和GPX4表达并增强ACSL4和TFR1表达。因此,重楼总皂苷可显著抑制乳腺癌MCF-7细胞的增殖和迁移能力、破坏细胞结构,其机制可能与诱导细胞铁死亡有关。

关键词：重楼总皂苷乳腺癌铁死亡机制

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基于蚁群算法WDM网络故障恢复路由研究

微计算机信息 2008年第33期24卷 97-98,251页

作者：简耀波阮双琛杨春勇华中科技大学光电子科学与工程学院武汉430074 深圳大学电子科学与技术学院深圳518060 中南民族大学电子与信息工程学院武汉430074

蚁群故障恢复算法是一种新颖的模拟进化算法。该算法基于群以正反馈作为首要的搜索机制,为复杂的组合优化问题提供了一种新方法。本文在传统蚁群算法的选择策略,本地搜索,以及信息更新三方面做出改进。改进后的算法用于解决波分复用光... 详细信息

蚁群故障恢复算法是一种新颖的模拟进化算法。该算法基于群以正反馈作为首要的搜索机制,为复杂的组合优化问题提供了一种新方法。本文在传统蚁群算法的选择策略,本地搜索,以及信息更新三方面做出改进。改进后的算法用于解决波分复用光网络中不同故障条件下的优化恢复路由问题。通过对一个典型网络CHINANET的数值仿真,证明了蚁群故障恢复算法在WDM网络中故障恢复路由的可行性。

关键词：波分多路复用蚁群算法波长路由优先开放最短路径算法宽度优先搜索算法

Pressure-Induced Metallization Accompanied by Elongated S–S Dimer in Charge Transfer Insulator NiS2

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Chinese Physics Letters 2019年第10期36卷 53-57页

作者： Hao Wu yong-Hui Zhou Yi-Fang Yuan chun-Hua chen Ying Zhou bo-Wen Zhang Xu-Liang chen Chuan-Chuan Gu Chao An Shu-yang Wang Meng-yao Qi Ran-Ran Zhang Li-Li Zhang Xin-jian Li Zhao-Rong yang Department of Physics and Laboratory of Material Physics Zhengzhou UniversityZhengzhou 450052 Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field LaboratoryChinese Academy of SciencesHefei 230031 University of Science and Technology of China Hefei 230026 Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601 Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204

The insulator-metal transition triggered by pressure in charge transfer insulator NiS2 is investigated by combining high-pressure electrical transport,synchrotron x-ray diffraction and Raman spectroscopy measurements up to40-50 *** compression,we show that the metallization firstly appears in the low temperature region at^3.2 GPa and then extends to room temperature at^8.0 *** the insulator-metal transition,the bond length of S-S dimer extracted from the synchrotron x-ray diffraction increases with pressure,which is supported by the observation of abnormal red-shift of the Raman modes between 3.2 and 7.1 *** the decreasing bonding-antibonding splitting due to the expansion of S-S dimer,the charge gap between the S-ppπ* band and the upper Hubbard band of Ni-3 d eg state is remarkabl.y *** results consistently indicate that the elongated S-S dimer plays a predominant role in the insulator-metal transition under high pressure,even though the p-d hybridization is enhanced simultaneously,in accordance with a scenario of charge-gap-controlled type.

关键词： NiS2 bonding charge

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改进的基于卡尔曼滤波的非均匀性校正算法

光电工程 2008年第1期35卷 131-135页

作者：简耀波阮双琛周慧鑫刘春平华中科技大学光电子工程系武汉430074 深圳大学工程技术学院深圳518060 西安电子科技大学技术物理学院西安710071

本文研究的对象是针对红外焦平面阵列探测单元响应的非线性对非均匀性校正精度的影响,提出了改进的基于卡尔曼滤波的非均匀性校正算法。该算法的研究方法是采用探测器响应的分段线性模型,对基于卡尔曼滤波器非均匀性校正算法进行扩展和... 详细信息

本文研究的对象是针对红外焦平面阵列探测单元响应的非线性对非均匀性校正精度的影响,提出了改进的基于卡尔曼滤波的非均匀性校正算法。该算法的研究方法是采用探测器响应的分段线性模型,对基于卡尔曼滤波器非均匀性校正算法进行扩展和改进,其结果能有效地克服红外焦平面阵列探测单元响应特性的非线性对校正精度的影响。实验结论表明,改进后的算法在一定程度上解决了探测器偏置和增益随时间漂移以及响应非线性影响非均匀性校正性能的问题,获得了较好的非均匀性校正效果。

关键词：图像处理红外焦平面非均匀性校正卡尔曼滤波

Distribution patterns of landslides triggered by the 2022 Ms 6.8 Luding earthquake,Sichuan,China

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山地科学学报（英文） 2023年第3期20卷 607-623页

作者： ZHANG jian-qiang yang Zong-ji MENG Qing-kai WANG Jiao HU Kai-heng GE yong-gang SU Feng-huan ZHAO bo ZHANG bo jianG Ning HUANG Yu MING Zai-yang ZHANG Yi-fan LIU Zhen-xing WU chun-hao ZHOU Wen-tao LIANG Xin-yue SUN Yu-qing yang Lian-bing yao Hong-kun FENG Pei-hua LIU Jia-li Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Bejing 100049China East China University of Technology Nanchang 330013China Institute of Geographic Sciences and Natural Resources Research Beijing 100101China Chongqing Jiaotong University Chongqing 400074China

At 12:52 pm on September 5,2022,an Ms 6.8 earthquake occurred in Luding County,Sichuan Province,*** on high-resolution aerial photographs and satellite imageries obtained after the earthquake,as well as field investigation,a total of 8685 earthquake-triggered landslides(EQTLs)were *** landslides covered an area of 30.7km^(2),with a source area of 9.4 km^(2).These EQTLs were mainly distributed in areas with a seismic intensity of VIII and *** of the landslides were small and medium in size,and their types included landslide,rockfall,and rock *** landslide distributions were found,EQTLs were distributed along the Xianshuihe fault,landslide area decreased gradually with an increased distance to the fault;EQTLs were distributed along the Daduhe River and roads;besides,landslide distribution was associated with ground deformation caused by the ***’characteristics indicated that,a large number of EQTLs were located near the foot of the slope;the full area of EQTLs and their source area followed a power *** study concluded that Luding EQTLs were greater in number and area but relatively smaller in terms of affected *** on geo-hazards post-earthquake and risk assessment were proposed in the earthquake-stricken area to support the rehabilitation and reconstruction.

关键词： 2022 Luding earthquake Earthquaketriggered landslide Landslide inventory Distribution patterns

天语计划——寻找第二个太阳系及探索动态宇宙

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天文学报 2024年第4期65卷 1-43页

作者：冯发波芮易成杜芝茂林清张聪聪周丹崔开明 OGIHARA Masahiro 杨明林杰蔡永志杨涛只庞晓莹简明杰李文雄郭恒潇史弦史建春李荐扬郭康柔姚嵩陈啊明贾鹏谭先瑜 JENKINS S.James 蒋宏轩张铭缘李可欣肖光耀郑书玥宣一帆郑捷何敏 JONES R.A.Hugh 宋翠英上海交通大学李政道研究所上海201210 上海交通大学物理与天文学院上海200240 上海天文馆(上海科技馆分馆) 上海200127 中国科学院上海天文台上海200030 同济大学测绘与地理信息学院上海200092 中国科学院星系宇宙学重点实验室(中国科学技术大学) 合肥230026 中国科学技术大学天文与空间科学学院合肥230026 中国科学院云南天文台昆明650216 中国科学院天体结构与演化重点实验室昆明650216 国际超新星中心-云南省国际超新星研究重点实验室昆明650216 西安交通大学物理学院西安710049 西交利物浦大学物理系苏州215123 上海师范大学上海市星系与宇宙学半解析研究重点实验室上海200234 Department of Astronomy Stockholm University Stockholm11421 中国科学院国家天文台北京100101 中山大学大气科学学院珠海519082 太原理工大学电子信息与光学工程学院太原030024 Instituto de Estudios Astrofısicos Facultad de Ingenierıa y CienciasUniversidad Diego Portales Santiago8170641 Centro de Astrof´ısica y Tecnologıas Afines(CATA)Santiago 8480000 山东大学空间与物理学院山东省光学天文与日地空间环境重点实验室威海264209 中国科学院国家天文台中国科学院天文光学技术重点实验室北京100101 Centre for Astrophysics Research University of Hertfordshire HertfordshireAL109AB 清华大学天体物理研究中心北京100084

像木星和土星这样的冷巨行星对类地行星的形成和宜居性起到了关键作用,因此,对像太阳系这样具有多个冷巨行星的系统的搜寻具有重要意义.Kepler以及TESS (Transiting Exoplanet Survey Satellite)太空望远镜成功地通过凌星的方法发现了... 详细信息

像木星和土星这样的冷巨行星对类地行星的形成和宜居性起到了关键作用,因此,对像太阳系这样具有多个冷巨行星的系统的搜寻具有重要意义.Kepler以及TESS (Transiting Exoplanet Survey Satellite)太空望远镜成功地通过凌星的方法发现了大量短周期行星,然而这些巡天项目的观测基线不足以发现更长周期的行星.为此,天语计划将部署两台1m望远镜(天语一号和天语二号),用于结合天语和其他计划的数据通过凌星法来发现冷巨行星及其他行星,并最终发现类太阳系.天语一号具有约10平方度的视场以及高速CMOS (complementary metal-oxide-semiconductor)科学相机,将对超过1000万颗恒星每小时进行一次高精度测光采样,并通过天语二号的多波段测光、光谱仪以及高分辨率成像对天语一号发现的候选行星进行确认.天语望远镜将放置于海拔约4000m的中国青海冷湖,是目前中国境内最好观测台址之一.天语对亮于14等星的测光精度为0.1%,对亮于18等星的测光精度优于1%,天语预计在5yr内将在类太阳周期发现超过300颗凌星行星,其中包括约17颗冷巨行星.基于系统轨道共面以及孪生地球发生率为10%的假设,天语预计将发现1-2个类太阳系,并可被未来的地球2.0计划所证实.此外,天语还将通过多种巡天观测模式测量从亚秒到周时标的光变,探测不同时标的时域现象,包括超新星早期光变、稀有变星和双星、潮汐瓦解事件、Be星、彗星活动以及系外小行星等.这些发现不仅将深化我们对宇宙的理解,还将为公众科学和科普提供重要平台.

关键词：技术:测光行星与卫星:探测行星与卫星:形成恒星:超新星:普通恒星:变星:普通小行星:普通恒星:伽马射线暴:普通

CEPC Technical Design Report

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Radiation Detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed Xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An Rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai Yu Bai yang Bai Vipul Bairathi Csaba Balazs Philip Bambade yong Ban Tripamo Bandyopadhyay Shou-Shan Bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci Xiao-Jun Bi Yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng Binglin Denis bodrov Anton bogomyagkov Serge bondarenko Stewart boogert Maarten boonekamp Marcello borri Angelo bosotti Vincent boudry Mohammed boukidi Igor boyko Ivanka bozovic Giuseppe bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua Cai Wenyong Cai Wujun Cai Yijian Cai Yizhou Cai Yuchen Cai Haiying Cai Huacheng Cai Lorenzo Calibbi Junsong Cang Guofu Cao jianshe Cao Antoine Chance Xuejun Chang Yue Chang Zhe Chang Xinyuan Chang Wei Chao Auttakit Chatrabhuti Yimin Che Yuzhi Che Bin chen Danping chen Fuqing chen Fusan chen Gang chen Guoming chen Hua-Xing chen Huirun chen Jinhui chen Ji-Yuan chen Kai chen Mali chen Mingjun chen Mingshui chen Ning chen Shanhong chen Shanzhen chen Shao-Long chen Shaomin chen Shiqiang chen Tianlu chen Wei chen Xiang chen Xiaoyu chen Xin chen Xun chen Xurong chen Ye chen Ying chen Yukai chen Zelin chen Zilin chen Gang chen boping chen chunhui chen Hok Chuen cheng Huajie cheng Shan cheng Tongguang cheng Yunlong Chi Pietro Chimenti Wen Han Chiu Guk Cho Ming-chung Chu Xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin Hanhua Cui Xiaohao Cui Zhaoyuan Cui Brunella D'Anzi Ling-Yun Dai Xinchen Dai Xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core shuangxue Deng Wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong jianin AGH University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakow Anhui University HefeiAnhui Applied Physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu University Institute of ScienceVaranasi Bandirma Onyedi Eylul University Bandirma Beihang University Beijing Beijing Computational Science Research Center Beijing Beijing Conveyi LTD Beijing Beijing Glass Research Institute Co. LtdBeijing Beijing Institute of Technology Beijing Beijing Normal University Beijing Brown University ProvidenceRI Budker Institute of Nuclear Physics Novosibirsk Cadi Ayyad University Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo University Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central China Normal University WuhanHubei Central South University ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan China academy of engineering physics MianyangSichuan China building materials academy Beijing China Center of Advanced Science and Technology Beijing China Institute of Atomic Energy Beijing China Jiliang University HangzhouZhejiang China Nuclear Instrument CO. LTDBeijing China University of Geosciences Beijing China University of Geosciences WuhanHubei China University of Mining and Technology XuzhouJiangsu China West Normal University NanchongSichuan Chongqing University Department of PhysicsChongqing Chulalongkorn University Bangkok City University of Hong Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell University IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu University DalianLiaoning Dalian University of Technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint Institute for Nuclear Research(DLNP JINR) Dubna East China University Of Science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The Linac and Damping Ring are situated on the surface,while the subterranean booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise