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Geosmin (GSM) and 2-methyl isoboneol(2-MIB) are the major compounds causing the odor of water body. A new method for the qualitative and quantitative analysis of GSM and 2-MIB, which isolated and enriched the odor compounds from the water samples by using Headspace solid-phase micro extraction (HS-SPME), and detected the two substances using GC/MS with internal standard method, was developed. The...
Cooperative communications achieve tremendous improvements in system performance. Meanwhile, it tends to change the conventional access and transmission schemes in wireless networks. Thus, CoopMAC is proposed and analyzed for fully connected WLANs. It improves the performance of the network dramatically by enabling additional collaboration from other nodes. However, how does it work in multi-hop Ad...
Real time traffic such as voice and video have strict requirements on the acceptable end-to-end packet delay. When there are different types of traffic with different requirements on tolerable latency, priority based packet scheduling schemes are normally used in order to reduce the queuing delay for real time services. However, in cognitive radio networks, the time that the system spends on spectrum...
Analysis of dissolved gases content in power transformer oil is very important to monitor transformer latent fault and ensure normal operation of entire power system. Analysis of dissolved gases content in power transformer oil is a complicated problem due to its nonlinearity and the small quantity of training data. Support vector machine (SVM) has been successfully employed to solve classification...
Although simple genetic algorithm (SGA) can, to some extent, improve the back propagation neural network (BP), it is prone to prematurity and losing the optimal solutions. Niche technology and fuzzy control theory are introduced to improve SGA and the improved one is used to optimize BP. The improved genetic algorithm is used to optimize BP neural network. In addition, due to the increasingly voltage...
Compared to conventional metal heat sinks, CNT-based microfins have exceptional advantage to drag heat out from electronic components due to the unique thermal and mechanical properties of the material. This paper will review the state of CNTs applied as cooling fins in microelectronic systems. The latest progresses will be presented.
A simulation with combination of a finite element analysis of Thermally Conductive Adhesive and contact resistance modeling has been presented. Using ANSYS and MATLAB software thermal conductivity and electrical resistivity of Conductive Adhesives with Ag filler and Epoxy matrix has been calculated. Thermally Conductive Adhesives are used as a thermal interface material to provide a better conduction...
The malicious code has characteristic of various types, and its ability of hiding increases quickly. In this paper, according to the analysis of hiding technology of malicious programs, it proposed a new idea of detecting malware based on the raw data. Finally, the results are given, which are compared with the current security detection scanners. It is a beneficial attempt of this method in detecting...
Recently the concern about network security has been increasing rapidly, certain malicious programs like Trojan horses are highly hazardous to the Internet security. In this paper, we firstly discuss the current research and developing trend to anti-Trojan approach on behavioral analysis. Moreover the behavioral features of Trojan at the stage of installation will be analyzed and summarized. Further...
A new method to reduce the numerical dispersion of the conventional alternating-direction-implicit finite-difference time-domain (ADI-FDTD) method is proposed. Firstly, the numerical formulations are modified with the artificial anisotropy, and the numerical dispersion relation is derived. Secondly, the relative permittivity tensor of the artificial anisotropy can be obtained by the micro-genetic...
Dual EKF which is suitable for simultaneously on-line estimating states and parameters of nonlinear systems is applied to the rotor resistance and rotor flux on-line simultaneous estimation problem of vector control system of induction machines. Based on dual EKF, a self-tuning vector control system with higher performances is established. Simulation results show that the proposed scheme is effective...
Information security is a hot issue at present. Digital image scrambling can not only be a usual image encryption, but also a pre-progress of digital watermark and image hiding. It is an important thesis. There are many image scrambling algorithms. Image scrambling algorithm based on queue transformation is a good method. But it has many disadvantages. So a new image scrambling algorithm based on...
The identification of the texts' attitude orientation is to identify the opinion on a special issue in a text is supporting or opposing. This paper introduces a method to identify the orientation of a Chinese text's attitude using the comprehensive information acquired form the text. First, we label the text with information in several layers, which include information of segmentation, POS, semantic...
In this paper, a simple and effective coplanar structure has been adopted to suppress harmonics in microstrip antenna element and array based on quarter wavelength microstrip step impedance resonators (SIR). This circuit is more compact than the previous coplanar harmonic rejection structure and can be restrained within one-twelfth wavelength region near to the antenna. It is a valuable technology...
To make a Web warehouse reflect the real Web accurately, we should keep timeliness, freshness and consistency for the Webviews. This paper focuses on one important part of Webview maintenance - mutual consistency between Webviews, which is formally named as multiple Webview consistency (abbreviated as MVC). Although the same problem has been well studied in a traditional data warehouse, however, it...
Web warehouse provides high availability and efficiency by utilizing materialized Webviews, which should be refreshed in time to keep freshness. During the refreshing, the consistency between a Webview and its base data, which is formally named single view consistency (abbreviated as SVC), must be guaranteed. Since the base data changes in a Web warehousing environment do not propagate from data sources...
Learning from noisy data is a challenging and reality issue for real-world data mining applications. Common practices include data cleansing, error detection and classifier ensembling. The essential goal is to reduce noise impacts and enhance the learners built from the noise corrupted data, so as to benefit further data mining procedures. In this paper, we present a novel framework that unifies error...
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