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A roughness parameter considering joint material properties and peak shear strength model for rock joints

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International Journal of Mining Science and Technology 2021年第3期31卷 413-420页

作者： liren Ban Weisheng Du Tianwei Jin Chengzhi Qi Xiaozhao Li School of Civil and Transportation Engineering Beijing University of Civil Engineering and ArchitectureBeijing 100044China Deep Mining and Rock Burst Research Institute China Coal Research InstituteBeijing 100013China State Key Laboratory of Coal Mining and Clean Utilization China Coal Research InstituteBeijing 100013China

This study aims at proposing a reasonable roughness parameter that can reflect the peak shear strength(PSS)of rock ***,the contribution of the asperities with different apparent dip angles to shear strength is *** the shear strength of the entire joint asperities is *** results showed that the PSS of the entire joint asperities is proportional to a key parameter hs,which is related to the geometric character of the joint surface and the joint material *** parameter hsis taken as the new roughness parameter,and it is reasonable to associate the PSS with the geometric characteristics of the joint *** on the new roughness parameter and shear test results of 20 sets of joint specimens,a new PSS model for rock joints is *** new model is validated with the artificial joints in this paper and real rock joints in published *** showed that it is suitable for different types of rock joints except for gneiss *** new model has the form of the Mohr-Coulomb model,which can directly reflect the relationship between the 3 D roughness parameters and the peak dilation angle.

关键词： Roughness Joint material properties Rock joints Peak shear strength Asperities

Wintertime extreme precipitation event over southern China and its typical circulation features

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Chinese Science Bulletin 2014年第10期59卷 1036-1044页

作者： Haifeng Zong Cholaw Bueh liren Ji The International Center for Climate and Environment Sciences Institute of Atmospheric Physics Chinese Academy of Sciences State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences

This study objectively defined an extreme precipitation event(EPE)over southern China and investigated the associated typical circulation pattern on the intraseasonal time *** occurrence of the EPE resulted from the joint operations of anomalous circulations over the subtropics and mid-high *** the EPE,simultaneous enhancements of the trough over the Bay of Bengal(BBT)and the Western Pacific subtropical high(WPSH)facilitated the abundant water vapor conditions over southern China,whereas the weakened East Asian major trough(EAT)led to a moderate cold air invasion to that region,producing a persistent convergence zone over southern *** train pattern in North Atlantic and Europe may be viewed as precursory signals for the EPE over southern China,and it contributed to the Rossby wave propagation in association with the *** wave packets propagated toward East Asia mainly along the North African-Asian subtropical westerly jet ***-frequency disturbances along this waveguide contributed to the enhancement of the BBT and WPSH and the weakening of the EAT,constituting favorable circulation conditions for the EPE.

关键词： Extreme precipitation event Troughover the Bay of Bengal - Western Pacific subtropicalhigh Precursory signal

Web Services interface of SSRF archive data analysis system

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Nuclear Science and Techniques 2007年第4期18卷 193-197页

作者： LI Lin SHEN liren ZHU Qing WAN Tianmin Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China

Accelerator database stores various static parameters and real-time data of accelerator. SSRF (Shanghai Synchrotron Radiation Facility) adopts relational database to save the data. We developed a data retrieval system based on XML Web Services for accessing the archive data. It includes a bottom layer interface and an interface applicable for accelerator physics. Client samples exemplifying how to consume the interface are given. The users can browse, retrieve and plot data by the client samples. Also, we give a method to test its stability. The test result and performance are described.

关键词：网络服务接口数据库加速器静态参数

Design and Analysis of Biomimetic Nose Cone for Morphing of Aerospace Vehicle

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Journal of Bionic Engineering 2017年第2期14卷 317-326页

作者： Jieliang Zhao Shaoze Yan liren Deng He Huang Yueming Liu Division of Intelligent and Biomechanical Systems State Key Laboratory of Tribology Department of Mechanical Engineering Tsinghua University Beijing 100084 China

Morphing capability is absolutely vital for aerospace vehicle to gain predominant functions of aerodynamics, mobility and flight control while piercing and re-entering the atmosphere. However, the challenge for existing aerospace vehicle remains to change its structure of nose cone agilely. This paper carries out a lot of observational experiments on honeybee＇s abdomen which enhances the flight characteristics of honeybee by adjusting its biomorphic shape. A morphing structure is adopted from honeybee＇s abdomen to improve both the axial scalability and bending properties of aerospace vehicle, which can lead to the super-maneuver flight performance. Combined with the methods of optimum design and topology, a new bionic morphing structure is proposed and applied to the design of morphing nose cone of aerospace vehicle. Furthermore, simulations are conducted to optimize the structural parameters of morphing nose cone. This concept design of biomimetic nose cone will provide an efficient way for aerospace vehicle to reduce the aerodynamic drag.

关键词： bio-inspired design honeybee morphing nose cone aerospace vehicle flight characteristic

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负载量对‘着色香’葡萄生长发育的影响

北方园艺 2024年第12期 21-27页

作者：闫可白瑞雯邹利人申海林孙琦温景辉吉林省农业科学院果树研究所吉林公主岭136100 临江市特产业发展服务中心吉林临江134600

以‘着色香’葡萄为试材,设置不同枝果比,通过对成熟期叶片光合能力、果实经济性状、枝条养分物质含量和花芽分化质量等指标进行分析,研究不同枝果比对‘着色香’葡萄生长发育的影响,以期确定‘着色香’葡萄的最佳负载量。结果表明:‘... 详细信息

以‘着色香’葡萄为试材,设置不同枝果比,通过对成熟期叶片光合能力、果实经济性状、枝条养分物质含量和花芽分化质量等指标进行分析,研究不同枝果比对‘着色香’葡萄生长发育的影响,以期确定‘着色香’葡萄的最佳负载量。结果表明:‘着色香’最佳枝果比1.1.最高不超过2∶3。适宜的负载量有助于优质果品的生产和连年丰产;负载量过高,果实品质降低,也不利于叶片、枝条的生长和花芽分化。

关键词：负载量 ‘着色香’葡萄果实品质贮藏营养主成分分析

The persistent anomaly of summertime circulation over the Ural Mountains

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Chinese Science Bulletin 2001年第19期46卷 1652-1656页

作者： LI Shuanglin Jl liren Nl Yunqi LASG Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Chinese Academy of Meteorological Science Beijing 100081China

The tropical heating and transient activity features during the period of the persistent anomaly of summertime circulation over the Ural Mountains are studied, and a possible mechanism responsible for formation and maintenance of persistent anomalies is proposed. The mechanism can be summarized as a kind of self-sustaining through a two-way interaction of stationary wave with transient eddies under the consistent forcing of abnormal heating in the tropics.

关键词： persistent anomalies tropical heating transient forcing planetary wave two-way interaction.

Enantioseparation of Novel Chiral Tetrahedral Clusters on a Chiral Stationary Phase (CSP) by High Performance Liquid Chromatography

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色谱 2004年第4期22卷 329-330页

作者： WANG Xia~1. LI Wenzhi~2, LIU Chunhui~1. CHEN liren~1. LI Yongmin~1.1. Lanzhou Institute of Chemical Physics, The Chinese Academy of Sciences, Lanzhou 730000, China 2. Chemistry and Chemical Engineer College, Liaocheng University, Liaocheng 252059, China ) Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China Chemistry and Chemical Engineer Colleger Liaocheng University Liaocheng 252059 China Lanzhou Institute of Chemical Physics Chinese Academy of Sciences 342 Tianshui Road Lanzhou 730000 China

An Intrusion Alarming System Based on Self-Similarity of Network Traffic

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Wuhan University Journal of Natural Sciences 2005年第1期10卷 169-173页

作者： YUFei ZHUMiao-liang CHENYu-feng liren-fa XUCheng ArtificialIntelligenceInstitute ZhejiangUniversityHangzhou310027ZhejiangChina／／CompulerandCommunicationInstituteHunanUniversityChangsha410082HunanChina ArtificialIntelligenceInstitute ZhejiangUniversityHangzhou310027ZhejiangChina CompulerandCommunicationInstitute HunanUniversityChangsha410082HunanChina

Intrusion detection system ean make effective alarm for illegality of networkusers, which is absolutely necessarily and important to build security environment of communicationbase service According to the principle that the number of network traffic can affect the degree ofself-similar traffic, the paper investigates the variety of self-similarity resulted fromunconventional network traffic. A network traffic model based on normal behaviors of user isproposed and the Hursl parameter of this model can be calculated. By comparing the Hurst parameterof normal traffic and the self-similar parameter, we ean judge whether the network is normal or notand alarm in time.

关键词： intrusion detection self-similarity network traffic model: networkprocessor

基于ERK介导C-Myc/PD-L1.同作用探讨参芪抑瘤方联合顺铂对H22肝癌荷瘤小鼠的抑瘤机制

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中国免疫学杂志 2024年第3期40卷 586-591页

作者：杨玉萍段永强白敏冯鑫周楠曹力仁李亚荣马兰甘肃中医药大学甘肃省实验动物行业技术中心兰州730000

目的:探讨参芪抑瘤方联合顺铂经ERK介导C-Myc/PD-L1.协途径对H22肝癌荷瘤小鼠的抑瘤作用及其机制。方法:60只SPF级雄性昆明小鼠,采用随机数字表法取1.只小鼠作为空白组,其余50只小鼠复制H22肝癌荷瘤小鼠模型,模型复制成功后将模型小鼠... 详细信息

目的:探讨参芪抑瘤方联合顺铂经ERK介导C-Myc/PD-L1.协途径对H22肝癌荷瘤小鼠的抑瘤作用及其机制。方法:60只SPF级雄性昆明小鼠,采用随机数字表法取1.只小鼠作为空白组,其余50只小鼠复制H22肝癌荷瘤小鼠模型,模型复制成功后将模型小鼠随机分为模型组、顺铂组[2.5×1.^(-3) g/(kg·3 d)]、参芪抑瘤方低[1..51. g/(kg·d)]、中[27.030 g/(kg·d)]、高剂量[54.060 g/(kg·d)]联合顺铂[2.5×1.^(-3) g/(kg·3 d)]组,每组1.只,治疗1. d,末次给药24 h后,麻醉处死小鼠,测定小鼠肿瘤抑制率和脾指数、胸腺指数;HE染色观察小鼠肿瘤组织病理学变化;ELISA试剂盒检测肿瘤组织匀浆液中EGF、IFN-γ含量;IHC法和Western blot法检测肿瘤组织中p-ERK1.2、C-Myc、PD-L1.白表达;RT-PCR法检测肿瘤组织中ERK、C-Myc、PD-L1.RNA表达水平。结果:与空白组相比,模型组小鼠平均体质量和脾脏指数均降低(P1.2、C-Myc、PD-L1.白表达和ERK、C-Myc、PD-L1.mRNA表达(P1.白表达,该机制可能通过调控ERK信号通路相关蛋白表达发挥抑瘤作用。

关键词：参芪抑瘤方顺铂肝癌 ERK通路 C-Myc/PD-L1