搜索结果: 31-45 共查到“知识库 光电子学与激光技术”相关记录1642条 . 查询时间(1.302 秒)
SURVEY METHODS FOR SEISMIC VULNERABILITY ASSESSMENT OF HISTORICAL MASONRY BUILDINGS
Earthquake Laser scanner Cultural Heritage Camera degli Sposi Mantegna
2017/5/20
On 20th and 29th of May 2012, two powerful earthquakes struck northern Italy. The epicentres were recorded respectively in Finale Emilia (magnitude 5.9 Ml) and Medolla (magnitude 5.8 Ml) in the provin...
SCAN TO BIM FOR 3D RECONSTRUCTION OF THE PAPAL BASILICA OF SAINT FRANCIS IN ASSISI IN ITALY
Laser scanning BIM Assisi Point clouds Security and safety management Internet of Things Internet of Everything
2017/5/20
The historical building heritage, present in the most of Italian cities centres, is, as part of the construction sector, a working potential, but unfortunately it requires planning of more complex and...
选择性激光熔化AlSi10Mg合金组织形貌及其拉伸性能
选择性激光熔化 AlSi10Mg 工艺参数 抗拉强度
2017/4/7
在不同激光功率、扫描速度等工艺参数条件下，使用选择性激光熔化设备（SLM100）3D打印成型AlSi10Mg合金拉伸试样，采用Olympus BX5光学显微镜与JEOL JSM-6490LV型扫描电子显微镜观察成型试样的显微组织形貌，研究激光功率、扫描速度对试样拉伸性能的影响。结果显示：成型试样的显微组织呈鱼鳞状或长条状，相互搭接且组织尺寸较小；在激光功率为190 W时，试样抗拉强度随扫描速度降低...
自适应调制编码技术研究
自适应调制编码 信道估计 MCS切换
2016/6/29
总结自适应调制编码技术（Adaptive Modulation and Coding,AMC）中现有的方法对AMC技术的深入研究具有重要意义。梳理自适应调制编码技术的发展及主要应用，对AMC技术中涉及的信道状态估计、MCS（Modulation and Coding Scheme）切换问题中已有算法进行归纳总结，讨论了各自的优缺点，在已有结论的基础上分析了ACM技术的发展趋势。
FILTERING OF TLS POINT CLOUDS FOR THE GENERATION OF DTM IN SALT-MARSH AREAS.
Terrestrial Laser Scanner DTM data clustering salt-marsh ecogeomorphic dynamics
2016/2/29
Marshes are ubiquitous landforms in estuaries and lagoons, where important hydrological, morphological and ecological processes
take place. These areas attenuate sea action on the coast and act as s...
COMPARISON BETWEEN AN AREA-BASED AND INDIVIDUAL TREE DETECTION METHOD FOR LOW-PULSE DENSITY ALS-BASED FOREST INVENTORY
Forest inventory Laser scanning k-NN Individual tree detection Accuracy
2016/2/29
Airborne laser scanning (ALS)-based forest inventories are being increasingly used. The two main approaches in deriving forest
information from small-footprint laser scanner data are the area-based a...
INCIDENCE ANGLE INFLUENCE ON THE QUALITY OF TERRESTRIAL LASER SCANNING POINTS
aser scanning incidence angle individual point quality measurement setup
2016/2/29
A terrestrial laser scanner measures the distance to an object with a precision in the order of millimeters. The quality of each single
point in a point cloud affects post-processing applications, su...
AUTOMATIC 3D POINT CLOUD REGISTRATION FOR CULTURAL HERITAGE DOCUMENTATION
terrestrial laser scanner registration/matching georeferencing cultural heritage
2016/2/29
Terrestrial laser scanning is a recognised technique for the geometric documentation of objects and surfaces in a variety of
applications but the amount of information acquired by laser scanners mak...
INTEGRATION OF FULL-WAVEFORM INFORMATION INTO THE AIRBORNE LASER SCANNING DATA FILTERING PROCESS
DTM Filtering Full-waveform Laser scanning Lidar
2016/2/29
Terrain classification of current discrete airborne laser scanning data requires filtering algorithms based on the spatial relationship
between neighbouring three-dimensional points. However, diffic...
AUTOMATIC EXTRACTION OF VERTICAL WALLS FROM MOBILE AND AIRBORNE LASER SCANNING DATA
buildings 3D feature extraction map updating position accuracy
2016/2/29
Building outlines in cadastral maps are often created from different sources such as terrestrial surveying and photogrammetric
analyses. In the latter case the position of the building wall cannot b...
在研究粒子群算法（PSO）及其改进的DGOSS算法、STCSSA算法基础上，从仿真任务共同体的定义、服务选择界定及服务品质（QoS)描述出发，改进设计了PSO的惯性权重动态调整策略，建立了一种优化的仿真任务共同体服务选择算法（ITCSSA）；通过仿真对比验证表明：ITCSSA算法较DGOSS算法、STCSSA算法有更好的收敛速度、精度和适用性，对于多用途仿真系统的资源分配优化具有一定的参考价值。
A Variational Eigenvalue Solver on a Photonic Quantum Processor
Variational Eigenvalue Solver Photonic Quantum Processor
2016/1/22
Quantum computers promise to efficiently solve important problems that are intractable on a conventional computer. For quantum systems, where the physical dimension grows expo-nentially, finding the e...
Rasterizing Airborne Laser Scanning Point Clouds by Block Kriging
Airborne laser scanning Point clouds Rasterization Block Kriging Geostatistics
2015/12/9
Airborne laser scanning (ALS) is increasingly becoming a standard method for the collection of dense elevation models, especially in 3D urban mapping. However, automation in processing of ALS point-cl...
Side Ratio Constrain Based Precise Boundary Tracing Algorithm for Discrete Point Clouds
Laser Scanning (LiDAR) Edge detection Aerial Photogrammetry Feature Extraction
2015/12/8
Boundary tracing of discrete points is an important step to building model reconstruction using LiDAR data, its result directly effects the location regularization of building corners and the reconstr...
A Case Study:Workflow Analysis of Power Line Systems for Risk Management
LIDAR Vegetation Change Detection Multitemporal Surveying Imagery
2015/12/8
Typically, it has been a challenge for utility companies to implement more automated approaches to powerline maintenance. Our study considers using two emerging technologies – LIDAR and direct multipl...