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In this paper, a novel dual-band suspended stripline (SSL) filter is proposed. Based on traditional designing technique, a band-pass SSL filter is designed. Considering the unique properties of metamaterials, we apply it to the filter structure designing. Metamaterials can produce negative permittivity and thus there forms a dual-band. The simulated results exhibit low insertion loss, high selectivity...
The Nuchal translucency (NT), which is the collection of fluid at the back of the fetal neck, is related to chromosomal defects and early cardiac failure in first trimester of pregnancy. In clinic, the thickness of NT is used as an important marker in prenatal screening, and is manually measured by sonographers in the mid-sagittal plane. In this paper, an automatic method based on dynamic programming...
Understanding how domain knowledge grows and evolves over time is critical to innovation in science and technology. In this study, a knowledge domain of smart tourism research in China is visually mapped through CiteSpace by a combination of semantic network analysis of research subjects and social network analysis of collaboration research network. Smart tourism related literature was collected from...
A novel UHF RFID tag antenna with broadband and circularly polarized feature has been proposed for metallic object application. Double-point orthogonal coupling feed technology utilizes two microstrips with the differ of a quarter-wavelength and loading cross-slot on the quasi-square radiation patch. Finally the tag antenna achieves 38 MHz and 16.2 MHz for the 3dB impedance bandwidth (898MHz-936MHz),...
Change detection for multitemporal hyperspectral images (HSIs) involves two major steps: change feature extraction and classification. For the first part, conventional methods mostly consider spectral features but neglect spatial patterns. Since multitemporal HSIs consist of four dimensions (one for time, one for spectral domain and two for spatial domain), we propose using 4-dimensional Higher Order...
There are two great challenges for classification of hyperspectral images (HSIs): lack in prior knowledge and serious internal-class variability. To address the issues, we propose a novel semisupervised method based on affinity scoring (AS). It can harness the fuzzy state of the contributions of spectral and spatial features to classification. The method consists of three major steps: over-segmentation,...
Sparse representation has been introduced to tackle the target detection problem in hyperspectral imagery. While using windows to build the sparse dictionary, there exists target contamination problem. In our approach, we utilize a learning method based on convex optimization to build a dictionary for sparse target detection. Through its application, prior information such as the size of windows can...
It has been understood the large drawback of a CLLC bidirectional serious resonant converter is using three magnetic components, i.e., the transformer and two resonant inductors. In this paper, an integrated magnetic transformer for simplifying and boosting the electrical vehicle (EV) and plug-in electrical vehicle (PHEV) on board charger module (OBCM) implementation and performance of a bidirectional...
This paper present a study of the isolated DC/DC stage of Bi-directional on-board battery charger module (OBCM) for electric vehicle (EV) and plug-in hybrid electric vehicle (PHEV) application. The modulated dual active bridge (DAB) converter and boost series resonant converter were thoroughly analyzed for this application. The ZVS boundary conditions, power stage optimization compatible to wide output...
As a kind of important earth observation satellites, network imaging satellites can improve the ability of processing complicate tasks, however, the process of solving complicate tasks is an optimization problem with multi-time windows, multitask, and multi-resource constrains, especially when processing collaborative tasks. This paper focuses on collaborative task scheduling problems, and three respects...
With the rapid development of high-tech such as the cloud technology, information security has become more critical than before, so the cryptography assunes a key technology in information security. Recently, some new cryptography theories have attracted increasing attention under the background of research on algorithm efficiency and security has become the current hot research topic. Chaotic algorithm...
Hyperspectral unmixing is an important issue to analyze hyperspectral data. Based on the present mixing models, this paper proposes a new nonlinear unmixing framework for hyperspectral imagery. The proposed framework transforms the hyperspectral unmixing problem to a constrained nonlinear least squares problem by introducing the abundance nonnegative constraint, abundance sum-to-one constraint and...
In this paper, a novel 2-D quaternion ESPRIT (2-D Q-ESPRIT) estimator, exploiting the two dimensional invariance of the array structure of a crossed-dipole array, for both the direction-of-arrival (DOA) and polarizations of multiple narrowband plane waves is proposed. To implement the 2-D Q-ESPRIT estimator, a two-stage quaternion joint eigenvalue decomposition (QJEVD) algorithm is devised through...
In this paper, based on the analysis of existing software engineering methods, a software development framework based on MDA is proposed. After the analysis of MDA advantage, an information management system that can be secondary development based on MDA is accomplished, which improve efficiency, simplify mission, and reduce cost of modification and maintenance.
In virtue of Embedded Qt4 open source edition, the structure and character of Qt4/Embedded GUI in Embedded Linux was asked to analyze by this paper, and attached importance to the GUI development procedure based on Qt4/Embedded Platform, and researches some key techniques in transplantation and application development of Qt4/Embedded system, Last but not least, the latest technology of Embedded Linux...
With the development and popularity of the approach of CBSD (Component-based Software Development), the number of reusable software component keeps on increasing. To evaluate the component quality objectively has become the key issue in CBSD applications. The current component quality models only focus on some types of components and usually are applicable to some kinds of users. This paper proposes...
An 8-element wideband printed dipole antenna array is analyzed and successfully implemented. The element used is double-sided elliptic printed dipole fed by a balanced transmission line. A wide-band balun from a microstrip feeding line to a balanced transmission line for the array was designed and implemented. Good agreement between the simulated and measured results of the array was observed. In...
A well-known result on the estimation theory is that biased estimators can outperform unbiased ones in terms of the mean-squared error (MSE). In this paper, we propose a biased Kalman filter (KF) by biasing the minimum-variance unbiased (MVU) output of a traditional KF. The theoretical results show that the proposed biased KF (BKF) provides a tradeoff between the estimation bias and variance, leading...
The main factors and their interrelationship that influence the Telecom operation are analyzed firstly, and then the cause-and-effect diagram and the competitive model of duopoly telecom operators are established based on system dynamics. The number of users and turnovers within price discrimination strategy and non-price discrimination strategy are simulated. Conclusions indicated that for a single...
In this article, a real-time, accurate and objective identification of different varieties of corn seeds is proposed, which is a large number of original features, contained color, texture and shape features, were extracted from corn seed images. Then, genetic algorithm and support vector machine (SVM) were used to select important ones and determine species. The proposed methods have optimized varieties...
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