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13 results on '"Hu, Hualang"'

3. Study on Survey Methods for Crop Area Change Reasons at National Scale

Author

Wu, Quan, Hu, Hualang, Liu, Yanxia, Wang, Danqiong, Duan, Xinyu, Jia, Lijuan, He, Yajuan, Rannenberg, Kai, Editor-in-chief, Sakarovitch, Jacques, Series editor, Goedicke, Michael, Series editor, Tatnall, Arthur, Series editor, Neuhold, Erich J., Series editor, Pras, Aiko, Series editor, Tröltzsch, Fredi, Series editor, Pries-Heje, Jan, Series editor, Whitehouse, Diane, Series editor, Reis, Ricardo, Series editor, Furnell, Steven, Series editor, Furbach, Ulrich, Series editor, Gulliksen, Jan, Series editor, Rauterberg, Matthias, Series editor, Li, Daoliang, editor, and Chen, Yingyi, editor

Published
2015
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6. Reliability Analysis of Cloud Service-Based Applications Through SRGM and NMSPN

Author

Hu Hualang, Pei Zhiyuan (裴志远), Zhang Ruxia (张儒侠), Guo Lin, XU Jiajun (许家俊), and Wang Fei

Subjects
020203 distributed computing, Multidisciplinary, Computer science, business.industry, Computation, 020207 software engineering, Failure rate, Cloud computing, Failure data, 02 engineering and technology, Reliability engineering, Reachability, 0202 electrical engineering, electronic engineering, information engineering, Stochastic Petri net, Graph (abstract data type), Basic service, business
Abstract

Cloud service-based applications are subject to reliability critical problem, as the reliability of the application relies on both the failed states and the probabilities of the failures. Classically, reliability analysis approaches are lack of estimating unknown failure rate and non-exponentially distributed failure times. We propose a new framework for analyzing the reliability. The method is mainly decomposed in four successive steps: a non-Makovian stochastic Petri net (NMSPN) model which describes the failure behavior of underlying applications, a software reliability growth model (SRGM) which estimates the failure data of each basic service, a reachability graph which discoveries all the failure sequences, and a computation procedure which computes the occurrences of non-exponential failures. We assess and validate our method by conducting experiment on an actual application. The results demonstrate that the method is competitive compared to the existing approaches for reliability analysis, while providing a better reliability. This result is helpful to the managers in optimizing the overall quality of the cloud service-based application.

Published
2019
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12. Model for climate-driven land cover change in China and Zoning study, 1981-1999

Author

Hu Hualang, Li Jing, Chen Yunhao, and Xu Dan

Subjects
geography, Plateau, geography.geographical_feature_category, Climatology, Environmental science, Land-use planning, Precipitation, Land cover, Zoning, China, Atmospheric temperature, Normalized Difference Vegetation Index
Abstract

In this paper, monthly NOAA /AVHRR remotely sensed images of 8 times 8 km from 1981 to 1999 are used to study the driving function of temperature and precipitation on NDVI dynamic changes in China, which then serves as a basis to study the regional distribution difference of climate driving on LUCC with the results that: northeast, Inner Mongolia and Qingzang plateau are comparatively sensitive to the precipitation, while the ample southeast region and the western Xinjiang are comparatively sensitive to the temperature. The main drivers and its intensity vary and distributes zonally from southeast to northwest region. Regional study of climate driving on LUCC is for the first time performed in this paper on the basis of the results above. Three regions of first level, 5 regions of second level and 15 regions of third level are given in this regionization scheme. The regionization furtherly indicates the regional distribution difference of climate driver on LUCC in China

Published
2004
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