检索结果-南通市图书馆

Journal of Earth Science 2024年第4期35卷 1243-1253页

作者： Jiongchao Wang Jun Zheng jichao guo Qing Lü Jianhui Deng Department of Civil Engineering Zhejiang UniversityHangzhou310058China Center for Balance Architecture Zhejiang UniversityHangzhou310007China State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China

Flexural toppling occurs when a series of layered rock masses bend towards their free *** is important to evaluate the maximum bending degree and the requirement of supports of flexural toppling rock mass to prevent rock mass cracking and even failure leading to a *** on the rock tensile strain-softening model,this study proposes a method for calculating the maximum curvature(C_(ppmax))of flexural toppling rock *** applying this method to calculate Cppmax of 9 types of rock masses with different hardness and rock layer thickness,some conclusions are drawn:(1)the internal key factors affecting C_(ppmax)are E^(⋆)(E^(⋆)=E_(ss)/E_(0),where E_(0)and E_(ss)are the mean deformation moduli of the rock before and after reaching its peak tensile strength,respectively),the strainεt corresponding to the tensile strength of rock,and the thickness(h)of rock layers;(2)hard rock layers are more likely to develop into block toppling than soft rock layers;and(3)thin rock layers are more likely to remain in flexural toppling state than thick rock *** addition,it is found that C_(ppmax)for flexural toppling rock masses composed of bedded rocks such as gneiss is related to the tensile direction.

关键词： flexural toppling rock mass maximum bending degree strain-softening model curvature rock mechanics

Estimation of fracture size and azimuth in the universal elliptical disc model based on trace information

在线全文

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2023年第6期15卷 1391-1405页

作者： jichao guo Jun Zheng Qing Lü Jianhui Deng Department of Civil Engineering Zhejiang UniversityHangzhou310058China State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China

The geometric characteristics of fractures within a rock mass can be inferred by the data sampling from boreholes or exposed ***,the universal elliptical disc(UED)model was developed to represent natural fractures,where the fracture is assumed to be an elliptical disc and the fracture orientation,rotation angle,length of the long axis and ratio of short-long axis lengths are considered as *** paper aims to estimate the fracture size-and azimuth-related parameters in the UED model based on the trace information from sampling *** stereological relationship between the trace length,size-and azimuth-related parameters of the UED model was established,and the formulae of the mean value and standard deviation of trace length were *** proposed formulae were validated via the Monte Carlo simulations with less than 5%of error rate between the calculated and true *** respect to the estimation of the size-and azimuth-related parameters using the trace length,an optimization method was developed based on the pre-assumed size and azimuth distribution forms.A hypothetical case study was designed to illustrate and verify the parameter estimation method,where three combinations of the sampling windows were used to estimate the parameters,and the results showed that the estimated values could agree well with the true ***,a hypothetical three-dimensional(3D)elliptical fracture network was constructed,and the circular disc,non-UED and UED models were used to represent *** simulated trace information from different models was compared,and the results clearly illustrated the superiority of the proposed UED model over the existing circular disc and non-UED models。

关键词： Universal elliptical disc(UED)model Rock mass Discrete fracture network(DFN) Optimization algorithm Inverse problem

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

某大跨度带天窗双层网架结构风压分布研究

北京建筑大学学报 2024年第4期40卷 97-103页

作者：郭绩超王孟鸿刘迪北京建筑大学土木与交通工程学院北京100044 瑞科同创电力工程设计有限公司北京100123

大跨结构杆件众多,形状较为复杂,而在我国规范中并没有涵盖所有复杂结构设计的相关参数,常导致结构设计时缺少参考依据,因此对大跨空间结构进行抗风设计的研究是很有必要的。以实际工程为背景,采用相对成本更低、效率更高的数值模拟(CFD... 详细信息

大跨结构杆件众多,形状较为复杂,而在我国规范中并没有涵盖所有复杂结构设计的相关参数,常导致结构设计时缺少参考依据,因此对大跨空间结构进行抗风设计的研究是很有必要的。以实际工程为背景,采用相对成本更低、效率更高的数值模拟(CFD)方法,对带有天窗的大跨网架结构进行风压研究。以网架结构辅助设计软件STADS与Fluent接口开发程序为基础,完成对带有天窗的网架结构的分区模型建立、数值风场计算域的生成以及计算结果的输出,极大提高了计算效率,最后通过对比分析总结了相应结构的风压分布规律;通过对结构天窗开闭合2种情况下的风压分布对比分析,发现2种结构形式总体风压分布规律一致,局部会有不同,结构开窗能有效降低总体风压值并减小结构所受的风吸力,但会对结构底部压力增大,使结构支座反力增加,为大跨度带天窗类网架结构的设计和施工提供了有利参考。

关键词：筒壳网架结构风压分布多风向角风场模拟

A universal elliptical disc(UED)model to represent natural rock fractures

在线全文

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2022年第2期32卷 261-270页

作者： Jun Zheng jichao guo Jiongchao Wang Honglei Sun Jianhui Deng Qing Lv Department of Civil Engineering Zhejiang UniversityHangzhou 310058China Center for Balance Architecture Zhejiang UniversityHangzhou 310007China College of Civil Engineering Zhejiang University of TechnologyHangzhou 310023China State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource&HydropowerSichuan UniversityChengdu 610065China

Since natural fractures are often non-equidimensional,the circular disc model still has great *** contrast,the elliptical disc model is more applicable to representing natural fractures,especially for slender *** paper developed a universal elliptical disc(UED)model by incorporating the center point,size,and azimuth of fractures as ***,with respect to the azimuth of elliptical fractures in three-dimensional(3D)space,we proposed a paradigm to construct its probability density function(PDF)by coupling the orientation and rotation angle of long axis based on three coordinate *** illustrate the construction process of the PDF of the fracture azimuth,we took the orientation following the Fisher distribution and the rotation angle following Von Mises distribution as an example.A rock slope is used to show the use of the developed UED model,and the 3D DFNs for the slope rock mass are generated by Monte Carlo *** addition,the DFNs for the rock mass are also generated based on the existing circular disc model and non-universal elliptical disc *** comparison results from the three models clearly illustrate the superiority of the UED model over the existing circular and non-universal elliptical disc models.

关键词： Discrete fracture networks Rock mass Discontinuity Elliptical disc model Fisher distribution Monte Carlo simulation

Single-cell transcriptomic landscape of peripheral blood cells provides insights into adaptation of red-eared sliders(Trachemys scripta elegans)

在线全文

学校读者我要写书评

暂无评论

Integrative Zoology 2024年第3期19卷 468-479页

作者： Rui guo Guangwei MA Xiaofei ZHAI Haitao SHI jichao WANG Ministry of Education Key Laboratory for Ecology of Tropical Islands Key Laboratory of Tropical Animal and Plant Ecology of Hainan ProvinceCollege of Life SciencesHainan Normal UniversityHaikouChina

Red-eared sliders(Trachemys scripta elegans),as one of the 100 most threatening aliens,have stronger immunity than the native species in response to environmental *** cells are an important component of immunity in the ***,the blood cell researches of turtle are still in the traditional blood cell classification and morphological structure ***,turtle granulocytes cannot be accurately identified using traditional ***-cell RNA sequencing techniques have been successfully implemented to study cells based on the mRNA expression patterns of each *** present study profiled the transcriptomes of peripheral blood cells in red-eared sliders to construct a single-cell transcriptional landscape of the different cell types and explored environmental adaptation mechanism from the perspective of *** 14 transcriptionally distinct clusters(platelets,erythrocytes1,erythrocytes2,CSF1R monocytes,POF1B monocytes,neutrophils,GATA2high basophils,GATA2low basophils,CD4 T cells,CD7 T cells,B cells,ACKR4 cells,serotriflin cells,and ficolin cells)were identified in the peripheral blood cells of the red-eared *** particular,a subtype of erythrocytes(erythrocytes1)that expressed immune signals was *** blood cells were grouped into three lineages:platelet,erythroid/lymphoid,and myeloid cell ***,based on differentiation trajectory and up-regulated gene expression,ACKR4 cells were newly identified as lymphocytes,and serotriflin and ficolin cells as *** single-cell transcriptional atlas of the peripheral blood cells in red-eared sliders provided in the present study will offer a comprehensive transcriptome reference for the exploration of physiological and pathological hematology in this species.

关键词： blood cells single-cell RNA-seq Trachemys scripta elegans

Innovations in metallurgical and materials processes:advancing liquid theory and honoring ***-jie guo's contributions to physical chemistry in metallurgy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2024年第1期31卷 1-2页

作者： Shuai Liu Jing guo Han-jie guo School of Artificial Intelligence Beijing Technology and Business UniversityBeijing100048China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing100083China

Spanning three decades,***-jie guo's research group has dedicated itself to exploring the fundamental theories and practical applications of physical chemistry within the realm of *** under the assumption that molecul... 详细信息

关键词： chemistry liquid complexes

Mechanism of rice variety resistance to the yellow stem borer,Scirpophaga incertulas (Walker)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Rice Research Newsletter 2002年第3期10卷 18-19页

作者： FANG jichao guo Huifang WANG Jieping,Inst of Plant Protection,Jiangsu Acad of Agri Sci,Nanjing 210014,China

Yellow stem borer(YSB),Scir-pophaga incertulas(Walker)has be-come the main rice insect pest onceagain along the Changjiang Riversince ***,no ricevariety with resistance to YSB hasbeen reported so *** Zhen-dao 2 with moderate resistance toYSB was *** 10 rice vari-eties with different resistance levels,YSB individuals showed distinct de-velopmental rates,and the asyn-chronous development even occurredin the same rice *** this

关键词： stem Mechanism of rice variety resistance to the yellow stem borer,Scirpophaga incertulas Walker

Mechanism of rice variety resistance to the yellow stem borer,Scirpophaga incertulas (Walker)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rice Science 2002年第Z1期 18-19页

作者： FANG jichao guo Huifang WANG Jieping,Inst of Plant Protection,Jiangsu Acad of Agri Sci,Nanjing 210014,China

关键词： stem Mechanism of rice variety resistance to the yellow stem borer,Scirpophaga incertulas Walker

MPZL1 as an HGF/MET signaling amplifier promotes cell migration and invasion in glioblastoma

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第5期11卷 70-73页

作者： Haimin Song Bowen Ni Xuetao Peng Weijuan Xu Shaochun Yang Runwei Yang Ziyu Wang Kaishu Li Rui Lin Yunxiao Zhang Jinglin guo Kezhi Wu Guangwei Shi jichao Sun Chunming He Yawei Liu Department of Neurosurgery The First Affiliated Hospital of Gannan Medical UniversityGanzhouJiangxi 341000China Department of Neurosurgery&Medical Research Center Shunde HospitalSouthern Medical University(The First People’s Hospital of Shunde Foshan)FoshanGuangdong 528300China Medical Research Center Shunde HospitalSouthern Medical University(The First People’s Hospital of Shunde Foshan)FoshanGuangdong 528300China Bidding and Procurement Office Shunde HospitalSouthern Medical University(The First People’s Hospital of Shunde Foshan)FoshanGuangdong 528300China Department of Neurosurgery Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdong 510515China Department of Neurosurgery The Sixth Affiliated Hospital of Guangzhou Medical UniversityQingyuanGuangdong 511518China Department of Neurosurgery The First Affiliated Hospital of Shantou University Medical CollegeShantouGuangdong 515041China Department of Geriatrics Shenzhen People’s Hospital(The Second Clinical Medical CollegeJinan UniversityThe First Affiliated HospitalSouthern University of Science and Technology)ShenzhenGuangdong 518020China

The extremely poor prognosis of patients is largely due to hepatocyte growth factor(HGF)/MET signaling,which promotes migration and invasion of glioblastoma(IDH wildtype;GBM;WHO grade 4).1,2 Clinical trials targeting MET,the only receptor of HGF,have yielded unimpressive results in GBM.3,4 Here we found that HGF induced strong chemotaxis on GBM cells,but MET expression was extremely ***,therefore,used single-cell RNA sequencing(scRNA-seq)coupled with label-free proteome profiling to identify membrane proteins associated with HGF/MET signaling amplification in GBM and to provide a novel modulator,MPZL1,for HGF/MET-targeted therapy.

关键词： invasion prognosis Clinical

Emerging direct current triboelectric nanogenerator for high-entropy mechanical energy harvesting

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第5期67卷 1297-1316页

作者： CHEN Jie guo RuiLong guo HengYu College of Physics and Electronic Engineering Chongqing Normal UniversityChongqing 401331China Department of Applied Physics Chongqing UniversityChongqing 401331China

In the era of the Internet of Things(IoT),the provision of sustainable power to distributed,mobile,and low-power-consumption electronic devices is a critical *** overcome this challenge,the triboelectric nanogenerator(TENG),a highly efficient high-entropy mechanical energy harvesting device,was developed in *** device enables the direct conversion of irregular and low-frequency mechanical energy into pulsed alternating current(AC)***,the incompatibility of most electronic devices with AC signals necessitates rectifier circuits or generators that deliver direct current(DC)*** recent years,DC-TENGs have undergone extensive development,achieving significant milestones in various application fields while also facing crucial challenges that require *** this review,three categories of DC-TENG devices with distinct operating mechanisms are comprehensively explored:multiphase coupling,mechanical rectification,and air *** typical structures and working mechanisms are thoroughly discussed,and specific output performance limitations,along with corresponding optimization strategies,are ***,the applications of DC-TENGs in various scenarios are ***,the challenges faced by DC-TENGs and potential solutions are analyzed to guide further advancements in this technology.

关键词： TENG direct current working mechanisms output performance limitations optimization strategies