Results 1 to 10 of about 328,446 (318)

Underwater light field determined by water constituents in highly turbid water: the case of Taihu lake

Journal of Limnology, 2013
The relationships between optical properties and water constituents in highly turbid productivewater were studied on the basis of the multiple bio-optical measurements and samplings of water constituents made during five cruises from 2006 to 2008 in ...
Chang-Chun Huang, Yun-Mei Li, Hao Yang, Qiao Wang, Jun-Sheng Li, Xia Chen   +5 more
doaj   +1 more source

Quantification of Surface Pattern Based on the Binary Terrain Structure in Mountainous Areas

Remote Sensing, 2023
Terrain significantly influences the physical processes and human activities occurring on the Earth’s surface, especially in mountainous areas. The classification and clarification of topographic structures are essential for the quantitative analysis of ...
Sijin Li, Xin Yang, Xingyu Zhou, Guoan Tang   +3 more
doaj   +1 more source

Navigation in REVERIE's virtual environments [PDF]

2015 IEEE Virtual Reality (VR), 2015
This work presents a novel navigation system for social collaborative virtual environments populated with multiple characters. The navigation system ensures collision free movement of avatars and agents. It supports direct user manipulation, automated path planning, positioning to get seated, and follow-me behaviour for groups.
Fiona M. Rivera, Fons Fuijk, Ebroul Izquierdo   +2 more
openaire   +1 more source

Distinguishing the Intervalley Plain from the Intermountain Flat for Landform Mapping Using the Sightline Algorithm

ISPRS International Journal of Geo-Information
The intervalley plain is an important type of landform for mapping, and it has good connectivity for urban construction and development on the Loess Plateau.
Ge Yan, Guoan Tang, Dingyang Lu, Junfei Ma, Xin Yang, Fayuan Li   +5 more
doaj   +1 more source

Topographic Spatial Variation Analysis of Loess Shoulder Lines in the Loess Plateau of China Based on MF-DFA

ISPRS International Journal of Geo-Information, 2017
The Loess Plateau in China is internationally known for its unique geographical features and has therefore been studied by many researchers. This research exploits the regional differences in the spatial morphological characteristics of Loess shoulder ...
Jianjun Cao, Jiaming Na, Jilong Li, Guoan Tang, Xuan Fang, Liyang Xiong   +5 more
doaj   +1 more source

Extrusion Approach Based on Non-Overlapping Footprints (EABNOF) for the Construction of Geometric Models and Topologies in 3D Cadasters

ISPRS International Journal of Geo-Information, 2017
Extrusion is widely used to construct models in 3D cadasters. However, the basic extrusion approach only supports relatively simple conditions, and a 3D cadastral data model that supports extruded 3D models that are associated with their corresponding ...
Yuan Ding, Nan Jiang, Zhaoyuan Yu, Binqing Ma, Ge Shi, Changbin Wu   +5 more
doaj   +1 more source

An Improved Bluetooth Indoor Positioning Method Using Dynamic Fingerprint Window

Sensors, 2020
The weighted K-nearest neighbor algorithm (WKNN) is easily implemented, and it has been widely applied. In the large-scale positioning regions, using all fingerprint data in matching calculations would lead to high computation expenses, which is not ...
Ling Ruan, Ling Zhang, Tong Zhou, Yi Long   +3 more
doaj   +1 more source

How Much Are Planting Dates for Maize Affected by the Climate Trend? Lessons for Scenario Analysis Using Land Surface Models

Agronomy, 2019
Process-based land surface models are important tools to study the historical and future effects of climate change and land use change. The planting date has a considerable effect on crop growth and consequently on dynamic parameters used in land surface
Meiling Sheng, A-Xing Zhu, David G. Rossiter, Junzhi Liu   +3 more
doaj   +1 more source

Deep Belief Networks Based Toponym Recognition for Chinese Text

ISPRS International Journal of Geo-Information, 2018
In Geographical Information Systems, geo-coding is used for the task of mapping from implicitly geo-referenced data to explicitly geo-referenced coordinates.
Shu Wang, Xueying Zhang, Peng Ye, Mi Du
doaj   +1 more source

Classification of Karst Fenglin and Fengcong Landform Units Based on Spatial Relations of Terrain Feature Points from DEMs

Remote Sensing, 2019
In this paper, a method for extracting Fenglin and Fengcong landform units based on karst topographic feature points is proposed. First, the variable analysis window method is used to extract peaks, nadirs, and saddle points in the karst area based on ...
Xianwu Yang, Guoan Tang, Xin Meng, Liyang Xiong   +3 more
doaj   +1 more source