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Based on time series data of SPOT / VGT and DMSP / OLS, the built-up and non-built-up areas of countries in South Asia were extracted via the local support vector machine method. Accuracy assessment showed that Kappa coefficients were above 0.85 were achieved in 1998 and 2013. Based on built-up areas detected, the urban expansion of the eight South Asian countries and their major cities were analyzed...
The surface mounting equipment (SME) is critical and complex in electronic assembly process. The key issue of SME is to realize accurate positioning and high-speed under the influence of parametric uncertainties (e.g., unknown gravitational load) and uncertain nonlinearities (e.g., friction). For achieving this aim, the adaptive robust control (ARC) based on dynamic LuGre model algorithm is proposed...
The purpose of this paper was to extend a landing force control method on the flat terrain proposed by Y.D Kim etc. [1] to absorb the impulsive ground reaction force for biped robot stable walking on the slope. Firstly, the swing foot and the terrain are modeled as two three-ports network systems that are connected respectively, and exchange energy with each other. Secondly, the impulsive impact of...
The Southeast U.S. is listed one of the fastest growing regions by the Census Bureau. The Defense Meteorological Satellite Program (DMSP)'s Operational Line-scan System (OLS) nighttime light (NTL) imagery offers a good opportunity for characterizing the extent and dynamics of urban development at global and regional scales. However, their ability to characterize inter-urban variation is limited due...
The surface mounting equipment (SME) is a critical and complex industrial system which require high-accuracy and high-speed linear motion. In SME applications, the point-to-point motion is the main motion trajectory and often subjected to parametric uncertainties and uncertain nonlinearities. To achieve high performance of the SME, the adaptive robust motion control algorithm with dynamic friction...
Imaging spectroscopic technique has been used for the mineral and rock geological mapping and alteration information extraction successfully with many reasonable results, but it is mainly used in arid and semi-arid land with sparse vegetation covering. In the case of the dense vegetation covering, the outcrop of the altered rocks is small and distributes sparsely, the altered rocks is difficult to...
Vegetation phenology tracks plants' lifecycle events, revealing the response of vegetation to global climate changes. Microwave backscatter is insensitive to signal degradation from solar illumination and atmospheric effects and could provide an alternative data source to optical remote sensing in phenology studies. In this study, we analyzed a time series of Ku-band radar backscatter measurements...
The Li River Basin in Guangxi Province, China forms the world-famous Guilin landscape. However, the eco-environment of Li River Basin deteriorated in last decades. To monitor the land use/land cover (LULC) changes in this area, the study area was classified into five land cover types: urban area, grassland, forest, farming area, and water body. Based on the training samples manly collected, we applied...
We report the first experimental realization of DFB laser array with λ/4 equivalent phase shift (EPS) using the reconstruction-equivalent-chirp (REC) technique for 1.3µm CWDM systems. The threshold currents are between 12mA and 20mA and the slope efficiencies at room temperature are from 0.35W/A to 0.45W/A. The side mode suppression rations (SMSR) are larger than 40dB under the bias currents of 70mA...
We report the first experimental realization of four-channel DFB laser array with λ/4 equivalent phase shift (EPS) based on the reconstruction-equivalent-chirp (REC) technique for 1.3 μm CWDM systems.
The study presented here evaluates the possibility to map the human settlement patterns in China using CBERS-2B 2.36m-resolution single-band panchromatic images as input. The automatic image information extraction workflow designed by the Joint Research Center, European Commission (JRC) is used for the global human settlement layer (GHSL) production. The classification methodology relies on textural...
The ecosystem of Tibetan Plateau is fragile and sensitive to global climate change. Land surface phenology detects the change of terrestrial ecosystems at the regional and global scale. In this study, we investigated the spatial and temporal variation of vegetation phenology in the Tibetan Plateau using GIMMS normalized difference vegetation index (NDVI) dataset from 1982 to 2003.The results show...
During the archaeological study of culture layers, much attention is paid to the filler of the materials. The fired soil (iron oxide) and carbonized substance are the primary targets of interest which are related to the culture layers. FISS is the first field imaging spectrometer based on a cooling area CCD developed in China. The number of bands of this instrument is 344, spectral range 379–870nm,...
Remote sensing is an effective tool in urban extent mapping and monitoring. In this study, a procedure to detect urban expansion is presented using SPOT5 panchromatic image with 2.5m resolution. First of all, the urban extents of different images are extracted with a PANTEX methodology, which use the anisotropic rotation-invariant textural grey-level co-occurrence measures as the presence of built-up...
Urban landscapes represent one of the most challenging areas for remote sensing analysis due to high spatial and spectral diversities of surface materials involved. High Resolution images (HR, better than 5-m spatial resolution) have a potential for detailed and accurate mapping of urban environment. The objective of this study is to analyze the effectiveness of multi-scale morphological features...
On April 14, 2010, an earthquake with a magnitude of 6.9 hit the Yushu prefecture in the Qinghai province of China. A strategy for rapid building damage assessment using mono-temporal post-earthquake very high resolution imagery is presented. Integrating automatic and manual interpretation, the strategy ensures the reliability, timeliness and interpretability of damage assessment products. This product...
Marine oil spill is a major threat to marine and coastal ecosystems and is seen relatively often, such as the Deepwater Horizon oil spill disaster in the Gulf of Mexico in 2010 and Bohai Sea oil spills in China in 2011. Fast and accurate discrimination of oil spill is the largest challenge in detection of oil spills using remote sensing technology. In this research imaging spectroscopic analysis and...
In this paper, we focused on the alunite alteration recognition which was characteristic of hydrothermal alteration zones in the study area of Cuprite mining area in southwestern of Nevada. Two solutions were practiced to improve the alteration recognition precision and reliability. One is the modeling of object reflectance spectra with the combination of linear and nonlinear model, which was taken...
A method for analyzing the urbanization process from multitemporal SPOT 5 panchromatic images is presented. A region-based local Mutual Information change indicator is proposed to perform the change analysis of large scenes. Experiments are conducted for mapping the urbanization of Tangshang, China, in between 2003 and 2008. The results show the efficiency of the change detection method.
The camera calibration precision directly affects the computer vision application. A method for improving camera calibration precision is proposed in this paper, which follows in details: Firstly, a new iterative sub-pixel detection approach based on the Forstner operator is proposed. Secondly, instead of print plane, this paper uses LCD (completely flat Liquid Crystal Display) for camera calibration...
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