Yuekui Yang

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We present a neural network method for review rating prediction in this paper. Existing neural network methods for sentiment prediction typically only capture the semantics of texts, but ignore the user who expresses the sentiment. This is not desirable for review rating prediction as each user has an influence on how to interpret the textual content of a(More)
The Radiometric Camera-by-Camera Cloud Mask (RCCM) is archived at the NASA Langley Distributed Active Archive Center as one of the standard products from the Multi-angle Imaging SpectroRadiometer (MISR) mission. The RCCM algorithm applied over land surfaces uses an Automated Threshold Selection Algorithm (ATSA) to derive thresholds that are applied to a(More)
With Internet growing exponentially, data mining in the web becomes the main method to find relevant information. With the amount of web sites and documents growing even faster and site contents getting updated more and more often, focused web crawler is becoming more and more popular. In the literature, how to order the unvisited URLs was studied deeply,(More)
Laser beams emitted from the Geoscience Laser Altimeter System (GLAS), as well as other spaceborne laser instruments, can only penetrate clouds to a limit of a few optical depths. As a result, only optical depths of thinner clouds ( about 3 for GLAS) are retrieved from the reflected lidar signal. This paper presents a comprehensive study of possible(More)
This paper establishes a framework that simulates the behavior of a spaceborne 532-nm micropulse photon-counting lidar in cloudy and clear atmospheres in support of the ICESat-2 mission. Adopted by the current mission design, the photoncounting system will be used to obtain surface altimetry for ICESat-2. To investigate how clouds affect surface elevation(More)
In support of the Ice, Cloud, and land Elevation Satellite (ICESat)-II mission, this paper studies the bias in surfaceelevation measurements caused by undetected thin clouds. The ICESat-II satellite may only have a 1064-nm single-channel lidar onboard. Less sensitive to clouds than the 532-nm channel, the 1064-nm channel tends to miss thin clouds. Previous(More)
Cloud detection/screening is a fundamental step in satellite data analysis. For the Ice, Cloud, and land Elevation Satellite (ICESat) and its successor ICESat-2, clouds can significantly affect the accuracy of the surface elevation retrievals. This paper proposes a new method for cloud screening in support of the ICESat-2 mission with focus on the polar ice(More)
Satellites always sample the Earth-atmosphere system in a finite temporal resolution. This study investigates the effect of sampling frequency on the satellite-derived Earth radiation budget, with the Deep Space Climate Observatory (DSCOVR) as an example. The output from NASA’s Goddard Earth Observing System Version 5 (GEOS-5) Nature Run is used as the(More)
Focused web crawler collects relevant web pages of interested topics from the Internet.Most searchers have studied strategy based on an initial model to gather as many relevant web pages as possible in the focused web crawling. However,web information continually change over time, the initial model representing outdated information can’t reflect(More)