Liu R.,Huaihai Institute of Technology |
Lu Y.,Lianyungang Technical College |
Gong C.,Huaihai Institute of Technology |
Liu Y.,Huaihai Institute of Technology
Infrared Physics and Technology | Year: 2012
Detecting point targets in infrared images is a difficult task. Template matching is simple and easy to implement for completing this task. However, it has some shortcomings. We propose an improved template matching method for detecting targets. Different from the classic template matching, the projection coefficients obtained from principal component analysis are used as templates and the nonlinear correlation is proposed to measure the similarity, the matching degree. The correlation in original space can not capture the higher-order statistical property of images. So its detection performance is not satisfying. We introduce the nonlinear correlation, which computes the correlation coefficients in a higher-dimensional feature space or even in an infinite-dimensional feature space, to capture the higher-order statistics. The detection performance is improved greatly. Results of experiments show that the improved method is competent to detect infrared point targets. © 2012 Elsevier B.V. All rights reserved.
Pei H.,Hong Kong University of Science and Technology |
Li Z.,Hong Kong University of Science and Technology |
Zhang J.,Hong Kong University of Science and Technology |
Wang Q.,Lianyungang Technical College
Construction and Building Materials | Year: 2015
Due to the specific characteristics such as rapid strength development, fast setting, and cohesive, magnesium phosphate cement (MPC) is becoming the most widely used materials for the maintenance of existing engineering structures. However, MPC has lower pH value than ordinary Portland cement (OPC). In this case, corrosion is becoming a big challenge for MPC concrete in harsh environment. To investigate the performance of reinforced MPC structures, a group of accelerated corrosion experiments was conducted on reinforced MPC concrete beams under accelerated corrosion conditions. Three non-destructive testing techniques including Half-cell Potential method, Galvanic Current method, and Acoustic Emission technique were employed to monitor the corrosion situation of the reinforcement in the test beams. Based on the measurement results, the effect of magnesium phosphate in the reinforced beam corrosion can be revealed and analyzed. Finally, accelerated corrosion tests of reinforcements in the OPC and MPC concrete beams were conducted to confirm the durability of MPC concrete. From the test results, it can be found that there is an acceptable discrepancy between the corrosion resistance performances of OPC and MPC concrete. Therefore, it can be said that the MPC concrete can be used as an alternative for the OPC concrete in the maintenance of marine buildings. © 2015 Elsevier Ltd. All rights reserved.
Lu Y.,Lianyungang Technical College |
Feng Y.,Huaihai Institute of Technology
Journal of Convergence Information Technology | Year: 2012
Target tracking is an important application in wireless sensor networks, in which all sensor nodes collaborate to discover the target and report its location information to users. To conserve energy in networks and improve tracking performance, the author propose an energy efficient target tracking algorithm based on sleeping scheduling (EETT-S) for wireless sensor network, EETT-S has three obvious features: Firstly, it improves virtual grid ideas to divide each cluster into M×N square area and select a working node in each grid to reduce redundant information and economize energy. Secondly, it improves energy utility by changing the activity of wireless communication module of sensor nodes, energy model and state transition of sensor nodes. Last, it adopts different sleep scheduling mechanism to mention improve the utilization of energy in the process of tracking. Simulation results show that, compared with AODV and TSR, EETT-S significantly reduce in energy consumption and prolong the network lifetime.
Xu J.M.,Lianyungang Technical College
Applied Mechanics and Materials | Year: 2014
With the rapid development of network technology, applications based on web especially in higher education are paid attention by the people day by day. Network education as the construction of open education system, more and more get the attention of education workers. This paper discusses the university student thought political education network platform to build, opened up a new carrier of the teachers and students to exchange and communication with the new channel. The platform to break the traditional mode of ideological and political education in time and space constraints, improve the teaching efficiency and quality, to achieve real quality education and the flexible personalized education, cultivate qualified builders and successors for socialism has very important significance. © (2014) Trans Tech Publications, Switzerland.
Bu X.,Nanjing Forestry University |
Ruan H.,Nanjing Forestry University |
Wang L.,Fujian Academy of Agricultural science |
Ma W.,Sichuan Academy of Forestry |
And 2 more authors.
Applied Soil Ecology | Year: 2012
Density fractionation can be a useful means of separating soil organic matter (SOM) into light and heavy fractions. Our objective was to evaluate SOM storage in density fractions and the relative contribution of the light fraction to total SOM pool under four different vegetations, including evergreen broad-leaved forest (EBF), coniferous forest (CF), dwarf forest (DF) and alpine meadow (AM), along an altitude gradation in the Wuyi Mountains of southeastern China, and to investigate the factors controlling the pool size in density fractions. Here we separated light and heavy fractions using 1.7gcm-3 sodium iodide solution. The concentrations of C and N in light and heavy fractions were the highest in AM soils, while the C/N ratios in density fractions were the highest in CF soils across soil depths. The amounts of C and N in the heavy fractions increased with increasing silt plus clay content in the corresponding soil depth. Greater SOM storages in light and heavy fractions under AM suggested that the accumulation of SOM at higher altitude (lower soil temperature and higher soil moisture) mainly depends on slower decomposition rate despite lower organic matter inputs rate. The relatively larger contribution of the light fraction to total SOM under CF than that under the other three vegetation types is mainly attributed to its higher amount and quality of litterfall input and greater fine root biomass. Significant correlation existed between light fraction C and N, dissolved organic C, microbial biomass C and N, indicating considerable cycling of C and N between these pools. A stronger correlation between heavy fraction C and microbial biomass C suggested that the heavy fraction organic matter could be associated with most microbial biomass. © 2011 Elsevier B.V.