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Articles by Xia Hu
Total Records ( 3 ) for Xia Hu
  Xia Hu , Min Zhou and Shuang Li
  As is growing interest in the conduct of business transactions by electronic means through the Internet and dedicated networks this is often referred to as Electronic Commerce (EC). This paper reviews developments in electronic commerce with a particular focus on its applicability and uptake within the construction industry. Electronic commerce business models are reviewed and the enablers and barriers to their uptake in the construction sector presented. Therefore this paper concludes with future trends in electronic commerce and the need for construction organizations to make the necessary investments that will enable them to take advantage of these and further aiming to contributing in solving this problem by applying automated safety rule checking to enterprise information construction and countermeasure research under the environment of electronic commerce.
  Xia Hu , Min Zhou and Qing Xia
  In various wireless sensor networks applications, the sensor node positioning problem is the basis and key technology of IOF (internet of things), which is essential for IOF monitoring activities. Due to the influence of environment and many other factors, the data collected by sensor node is easily generate errors, leading to the existing location algorithm or model positioning effect not so satisfactory. Aiming to this problem, this paper using internet (Geometric) topology structure information, based on the model of Location Estimation-Locality Preserving Canonical Correlation Analysis (LE-LPCCA), through transforming the depiction of signal space and physical space local information, proposed a new IOF positioning model LE-RLPCCA. Compared with the kind methods at present, model LE-RLPCCA has a better robustness of error-tolerance technology, positioning accuracy and stability improved evidently.
  Xia HU , Lian-You LIU , Shun-Jiang LI , Bi-Lin XIAO and Mu-Xing LIU
  Taibus County, Inner Mongolia, China, lies in a farming-pastoral ecotone, where severe wind erosion and various aeolian sand hazards are prevalent and fixed and semi-fixed sand dunes occur frequently. This study was conducted to investigate the relationships between sand transportation rate and wind speed for the fixed and semi-fixed sand dunes based on field measurements. The annual quantity of soil erosion by wind was estimated using meteorological wind data. The results indicated that the sand transportation rate in Taibus County in 2000 was 57.38 kg cm−1 year−1 for the semi-fixed dunes and 4.56 kg cm−1 year−1 for the fixed dunes. The total duration of erosive winds covered 12.5% of the time of the year, and spring posed the highest potential of sand transportation. Wind with low speed (≤ 17 m s−1) and high frequency plays a dominant role in sand transportation, while strong wind (≥ 17 m s−1) with low frequency significantly enhanced the sand transportation. Erosive wind speed, directions, and frequency were three crucial dynamic factors influencing sand hazards in the farming-pastoral ecotone. The dominant factors intensifying sand and dust storms in Taibus County might be related to the favorable wind condition in combination with the durable drought, which led to land desertification and vegetation degradation.
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