检索结果-南通市图书馆

Intelligent extraction of road cracks based on vehicle laser point cloud and panoramic sequence images

Journal of Road Engineering 2024年第1期4卷 69-79页

作者： Ming guo Li Zhu Ming Huang Jie Ji Xian Ren Yaxuan {1. Chutian Gao School of Geomatics and Urban Spatial Informatics Beijing University of Civil Engineering and ArchitectureBeijing 102616China Engineering Research Centre of Representative Building and Architectural Heritage Database Ministry of EducationBeijing 100044China Key Laboratory of Modern Urban Surveying and Mapping National Administration of SurveyingBeijing 102616China School of Civil and Transportation Engineering Beijing University of Civil Engineering and ArchitectureBeijing 102616China

In light of the limited efficacy of conventional methods for identifying pavement cracks and the absence of comprehensive depth and location data in two-dimensional photographs,this study presents an intelligent strategy for extracting road *** methodology involves the integration of laser point cloud data obtained from a vehicle-mounted system and a panoramic sequence of *** study employs a vehicle-mounted LiDAR measurement system to acquire laser point cloud and panoramic sequence image data simultaneously.A convolutional neural network is utilized to extract cracks from the panoramic sequence *** extracted sequence image is then aligned with the laser point cloud,enabling the assignment of RGB information to the vehicle-mounted three dimensional(3D)point cloud and location information to the two dimensional(2.)panoramic ***,a threshold value is set based on the crack elevation change to extract the aligned roadway point *** three-dimensional data pertaining to the cracks can be *** experimental findings demonstrate that the use of convolutional neural networks has yielded noteworthy outcomes in the extraction of road *** utilization of point cloud and image alignment techniques enables the extraction of precise location data pertaining to road *** approach exhibits superior accuracy when compared to conventional ***,it facilitates rapid and accurate identification and localization of road cracks,thereby playing a crucial role in ensuring road maintenance and traffic ***,this technique finds extensive application in the domains of intelligent transportation and urbanization *** technology exhibits significant promise for use in the domains of intelligent transportation and city development.

关键词： Road crack extraction Vehicle laser point cloud Panoramic sequence images Convolutional neural network

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Advanced modeling of the absorption enhancement of black carbon particles in chamber experiments by considering the morphology and coating thickness

引用

Frontiers of Environmental Science & Engineering 2024年第9期18卷 129-142页

作者： Xiaodong wei Jianlin Hu Chao Liu Xiaodong Xie Junjie Yin Song {1. Min Hu Jianfei Peng Huijun Wang Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjing 210044China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Key Laboratory of Meteorological Disaster(Ministry of Education)Nanjing University of Information Science and TechnologyNanjing 210044China Nansen−Zhu International Research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China East china Air Traffic Management Bureau CAAC Shanghai 200335China State Key Joint Laboratory of Environmental Simulation and Pollution Control International Joint Laboratory for Regional Pollution Control(IJRC)(Ministry of Education)College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Tianjin Key Laboratory of Urban Transport Emission Research&State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control College of Environmental Science and EngineeringNankai UniversityTianjin 300071China

Measurements studies have shown that the absorption of radiation by black carbon(BC)increases as the particles ***,there are significant discrepancies between the measured and modeled absorption enhancement(E_(abs)),largely due to the simplifications used in modeling the mixing states and shape *** took advantage of chamber experiments on BC aging and developed an efficient method to resolve the particle shape based on the relationship between the coating fraction(ΔD_(ve)/D_(ve),0)and fractal dimension(D_(f)),which can also reflect the variations of D_(f)during the whole BC aging *** with externally and partly mixed states(0≤ΔD_(ve)/D_(ve),0≤0.5)can be considered to be uniformly distributed with the D_(f)values of 1.8–2.1.whereas the Df values are constrained in the range 2.2.2.8 for fully mixed states(ΔD_(ve)/D_(ve),0>0.5).The morphological parameters(i.e.,the effective density and the dynamic shape factor)were compared with the measured values to verify the simulated *** simulated mean deviations of morphological parameters were smaller than 8%for the method resolving the particle *** applying a realistic shape and refractive index,the mass absorption cross for fully mixed states can be improved by 1.%compared with a simplified core–shell *** on our understanding of the influence of D_(f)andΔD_(ve)/D_(ve),0 on E_(abs),we propose a two-stage calibration equation to correct the E_(abs)values estimated by the core–shell model,which reduces the simulation error in the Mie calculation by 6%–1.%.

关键词： Black carbon Mixing states Fractal dimension Dynamic shape factor Absorption enhancement

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optimization and comparison of accelerating cavities for the SSRF

引用

Nuclear Science and Techniques 1997年第3期 51-54页

作者： Chen Ming 1. guo Yi Gang 1. Qin Jiu 2. Wang Guang {1. 3 ( 1. Shanghai Institute of Nuclear Research, the chinese academy of sciences, Shanghai 2.1.00 2. Institute of High Energy Physics, the chinese academy of sciences, beijing 1.0039

ＯｐｔｉｍｉｚａｔｉｏｎａｎｄｃｏｍｐａｒｉｓｏｎｏｆａｃｅｌｅｒａｔｉｎｇｃａｖｉｔｉｅｓｆｏｒｔｈｅＳＳＲＦＣｈｅｎＭｉｎｇ１，ＧｕｏＹｉＧａｎｇ１，ＱｉｎＪｉｕ２，ＷａｎｇＧｕａｎｇＷｅｉ３（１Ｓｈａｎｇｈ... 详细信息

ＯｐｔｉｍｉｚａｔｉｏｎａｎｄｃｏｍｐａｒｉｓｏｎｏｆａｃｅｌｅｒａｔｉｎｇｃａｖｉｔｉｅｓｆｏｒｔｈｅＳＳＲＦＣｈｅｎＭｉｎｇ１，ＧｕｏＹｉＧａｎｇ１，ＱｉｎＪｉｕ２，ＷａｎｇＧｕａｎｇＷｅｉ３（１ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＮｕｃ...

关键词： RF cavity High order modes(HOM) SSRF Feasibility studies

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Soil Phosphorus Dynamics as Influenced by Land Use Changes in Humid Tropical, Southwest china

引用

Pedosphere 2005年第1期15卷 24-32页

作者： YANGJing-Cheng HUANGJian-Hui PANQing-Min TANGJian-wei HANXing-{1. LaboratoryofQuantitativeVegetationEcology InstituteofBotanyChineseAcademyofSciencesBeijing1000g3China LaboratoryofQuantitativeVegetationEcology InstituteofBotanyChineseAcademyofSciencesBeijing1000g3China／／BeijingNaturalHistoryMuseumBeijing100050China XishuangbannaTropicalBotanicalGarden ChineseAcademyofSciencesYunnan666303China

Land use changes can greatly influence soil phosphorus (P) dynamics, especially when converting native forests to agricultural land. Soils in Xishuangbanna, which is one of southwest china s tropical areas that maintain fragments of primary forests, were studied to a) evaluate the effect of two common land use changes, conversion of forests to agricultural land or rubber tree plantation, on the dynamics of available P and total P in bulk soils as well as total P in particle size fractions; b) assess the rel…

关键词： BRAZILIAN AMAZON ORGANIC-MATTER NUTRIENT POOLS DEFORESTATION FRACTIONS PHOSPHATE BIOMASS LOSSES FIRE

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Schottky infrared detectors with optically tunable barriers beyond the internal photoemission limit

引用

The Innovation 2024年第3期5卷 69-76页

作者： Jintao Fu Zhongmin guo Changbin Nie Feiying Sun Genglin Li Shuanglong Feng Xingzhan {1. Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China University of chinese academy of sciences Beijing 100049China Chongqing School University of Chinese Academy of SciencesChongqing 400714China

Internal photoemission is a prominent branch of the photoelectric effect and has emerged as a viable method for detecting photons with energies below the semiconductor *** breakthrough has played a significant role in accelerating the development of infrared imaging in one chip with state-of-the-art silicon ***,the performance of these Schottky infrared detectors is currently hindered by the limit of internal photoemission;specifically,a low Schottky barrier height is inevitable for the detection of low-energy infrared ***,a distinct paradigm of Schottky infrared detectors is proposed to overcome the internal photoemission limit by introducing an optically tunable *** device uses an infrared absorbing material-sensitized Schottky diode,assisted by the highly adjustable Fermi level of graphene,which subtly decouples the photon energy from the Schottky barrier ***,a broadband photoresponse spanning from ultraviolet to mid-wave infrared is achieved,with a high specific detectivity of 9.83×1.1. cm Hz1.2.W−1.at 2.700 nm and an excellent specific detectivity of 7.2.1.9 cm Hz1.2.W−1.at room temperature under blackbody *** results address a key challenge in internal photoemission and hold great promise for the development of the Schottky infrared detector with high sensitivity and room temperature operation.

关键词： Schottky tunable beyond

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Experiment of X-ray Generations Using Laser-Compton Scattering at LINAC of SINAP

引用

原子核物理评论 2009年第S1期26卷 109-114页

作者： PAN Qiang-yan1,XU Wang1,LUO Wen1,3,FAN Gong-tao1,3,Yang Li-feng1,3,Fan Guang-wei1,3,LI Yong-jiang1,3,XU Ben-ji1,SHI Xiang-chun2.LIN guo-qiang1, YAN Zhe1,XU Yi1,3,CHEN Jing-gen1,guo wei1,WANG Hong-wei1,WANG Cheng-bin1, XU Jia-qiang1,Ma Yu-gang1,CAI Xiang-zhou1, ZHAO Ming-hua1,SHEN Wen-qing1(1 Shanghai Institute of Applied Physics,chinese academy of sciences,Shanghai 2.1800,china 2.Shanghai Institute of Optics and Fine Mechanics,chinese academy of sciences,Shanghai 2.1800,china 3 Graduate School of chinese academy of sciences,beijing 100049,china) Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Graduate School of chinese academy of sciences Beijing 100049China

Laser Compton scattering(LCS) can generate X-rays or γ-rays with high brightness and easy controlled polarization by applying high-peak-power laser pulses to relativistic electron bunches. One of the most promising approaches to short pulsed X-ray sources is the laser synchrotron source. It is based on LCS between picoseconds relativistic electron bunches and picoseconds laser pulses. A project of Shanghai laser electron gamma source with LCS method has been proposed on Shanghai synchrotron radiation facility. Before that,a prototype has been developed in the beamline of the linear accelerator at the Shanghai Institute of Applied Physics,chinese academy of sciences. The LCS experiment was carried out by using the 1.7 MeV,5 Hz,1.ns,0.1.nC electron bunches from the linear accelerator and the 1. ns,1. MW peak power,Nd∶YAG laser pulses. In this communication,we describe the details and report the first results of this experiment.

关键词： Compton scattering Nd∶YAG laser γ-ray source polarization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Characteristics and genetic mechanism of the Mesoproterozoic rift system,Ordos Basin,china

引用

Energy Geoscience 2024年第1期5卷 141-152页

作者： Meng Li Xiangbin Yan wei Zhang Yuanling {1. Chaoying Liu Lingling Fan Shuang Yang Petroleum Exploration and Production Research Institute SINOPECBeijing100083China Exploration and Development Research Institute SINOPEC North China CompanyZhengzhouHenan450006China

The Mesoproterozoic rifts are developed in the Ordos Basin located in the western margin of the North china *** on the latest 3D seismic data and previous research results,this study intends to discuss the zonal differential deformation characteristics and genetic mechanism of the Mesoproterozoic rifts in the Ordos ***-trending rifts are developed in the Mesoproterozoic in the south-central Ordos Basin,the main part of which are located near the western margin of the North china ***-trending rifts are developed in the north of the basin,while NW-NNW rifts in the Mesoproterozoic in Hangjinqi *** genetic mechanism of the Mesoproterozoic rifts is related to regional extensional stress field,plate boundary conditions and internal preexisting *** main extensional stress direction strikes NWW-SSE({2.0°)in the western margin of the North china Plate,based on the forward rift trend of the northern *** Hangjinqi area,the reactivation of the existing NWtrending Wulansu fault and NW-NW-trending Daolao fault,results in dextral shear stress *** boundary between the western margin of the North china Plate and its adjacent plates forms a nearly NS-trending preexisting basement tectonic belt,which intersects with the NWW-SSE({2.0°)extensional stress at an acute angle of 60°.Therefore,the western margin of the North china Plate is formed by oblique normal faults under oblique *** to the long time span of Columbia Supercontinent breakup({2.8e{2.6 Ga),the oblique rift in the south-central Ordos Basin is formed under the continuous oblique extension at the western margin of the North china Plate.

关键词： Columbia Supercontinent Ordos Basin Rift system Mesoproterozoic Genetic mechanism

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Eolian origin of the Miocene loess-soil sequence at Qin'an,china:evidence of quartz morphology and quartz grain-size

Eolian origin of the Miocene loess-soil sequence at Qin'an,C...

引用

中国科学院地质与地球物理研究所2.06学术年会

作者： LIU Jinfeng~1,guo zhengtang~(2.1),QIAO Yansong~(3,1),HAO Qingzheng~1 & YUAN Baoyin~1 Institute of {2. and geophysics,chinese academy of sciences,beijing 10002.,china 2.SKLLQG,Institute of Earth Environment,chinese academy of sciences,Xi’an 710075,china 3.Institute of Geomechanics,chinese academy of Geological {12.,beijing 100081,china

Grain-morphology and grain-size distributions of the quartz fraction from the QA-I loess-soil sequence are examined,and compared with those of the typical eolian deposits of Quaternary age from the Xifeng *** of the quartz grains from QA-I section have irregular and angular shapes which are highly similar to those of the Xifeng Quaternary eolian samples,and also to those of the Quaternary and Pliocene eolian deposits ***-size analyses show that the quartz fraction is dominated by the silt fraction1.0μm. These features are characteristic of eolian dust ***-size analyses on both quartz and bulk samples consistently indicate a pattern of coarser grain-size in loess and finer grain-size in soils,also similar to that of the Quaternary loess-soil *** suggest that the Miocene paleosols are accretionary soils formed in monsoon *** quartz morphological features and grain-size distributions therefore provide new evidence of an eolian origin of the Qin’an Miocene sequences.

关键词： Miocene loess-paleosol sequence quartz grain scanning electron microscopy grain size

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Inetetamab combined with pyrotinib and chemotherapy in the treatment of breast cancer brain metastasis: A case report

引用

World Journal of Clinical Cases 2024年第3期12卷 575-581页

作者： Qing-Qing Dou Ting-Ting Sun guo-Qiang Wang {1.-Bing Tong Graduate Student Institute Inner Mongolia Medical UniversityHohhot 010000Inner Mongolia Autonomous RegionChina Central Breast Area B Beijing University Cancer Hospital Inner Mongolia HospitalHohhot 010000Inner Mongolia Autonomous RegionChina

BACKGROUND Breast cancer brain metastasis(BCBM)is an advanced breast disease that is difficult to treat and is associated with a high risk of *** prognosis is usually poor,with reduced quality of *** this context,we report the case of a patient with HER-2.positive BCBM treated with a macromolecular mAb(ine-tetamab)combined with a small molecule tyrosine kinase inhibitor(TKI).CASE SUMMARY The patient was a 58-year-old woman with a 1.-year history of type 2.*** was compliant with regular insulin treatment and had good blood glucose *** patient was diagnosed with invasive carcinoma of the right breast(T3N1.0 stage IIIa,HER2.positive type)through aspiration biopsy of the ipsilateral breast due to the discovery of a breast tumor in February *** showed ER(-),PR(-),HER-2.3+),and Ki-67(55-60%+).Preoperative neoadjuvant chemotherapy,i.e.,the AC-TH regimen(epirubicin,cyclophosphamide,docetaxel-paclitaxel,and trastuzumab),was administered for 8 *** underwent modified radical mastectomy of the right breast in November 2.1. and received tocilizumab targeted therapy for 1.*** metastasis was found 9 mo after *** underwent brain metastasectomy in August *** showed ER(-)and PR.(-),HER-2.3+),and Ki-67(1.-2.%+).In November 2.2.,the patient experienced headache *** an examination,tumor recurrence in the original surgical region of the brain was observed,and the patient was treated with inetetamab,pyrotinib,and ***-brain radiotherapy was *** patient and her family refused radiotherapy for personal *** September 2.2.0}a routine examination revealed that the brain tumor was considerably *** original systemic treatment was continued and combined with intensity-modulated radiation therapy for brain metastases,followed by regular hospitalization and routine *** patient’s condition is generally stable,and she has a relatively high qua

关键词： Breast cancer brain metastasis Resistance to trastuzumab Macromolecule inetetamab Small molecule tyrosine kinase inhibitor Radiation therapy HER2.positive Case report

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Interfacial Oxygen Octahedral Coupling-Driven Robust Ferroelectricity in Epitaxial Na_(0.5)Bi_(0.5)TiO_(3)Thin Films

引用

Research 2024年第2期2023卷 149-157页

作者： Haojie Han Qinghua Zhang wei Li Yiqun Liu Jiasheng {1. Yue Wang Qian Li Lin Gu Ce-Wen Nan Jing Ma State Key Laboratory of New Ceramics and Fine Processing Schoolof Materials Science and EngineeringTsinghua UniversityBeijing 100084China beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

The oxygen octahedral rotation(OOR)forms fundamental atomic distortions and symmetries in perovskite oxides and definitely determines their properties and ***,epitaxial strain and interfacial structural coupling engineering have been developed to modulate the OOR patterns and explore novel properties,but it is difficult to distinguish the 2.***,different symmetries are induced in Na_(0.5)Bi_(0.5)TiO_(3)(NBT)epitaxial films by interfacial oxygen octahedral coupling rather than epitaxial *** NBT film grown on the Nb:SrTiO_(3)substrate exhibits a paraelectric tetragonal phase,while with La_(0.5)Sr_(0.5)MnO_(3)as a buffer layer,a monoclinic phase and robust ferroelectricity are obtained,with a remanent polarization of 42.C cm^(-2.and a breakdown strength of 7.89 MV cm^(-1.,which are the highest record among NBT-based ***,the interfacial oxygen octahedral coupling effect is demonstrated to propagate to the entire thickness of the film,suggesting an intriguing long-range *** work provides a deep insight into understanding the structure modulation in perovskite heterostructures and an important avenue for achieving unique functionalities.

关键词： effect. interfacial coupling

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：