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This novel design technique was developed for the input pre-match circuit of discrete base station power amplifiers utilizing multi-section low pass, band pass and high pass topologies by carefully selecting the pole locations to achieve state of the art performance for broadband operation over 20% fractional bandwidth. The techniques have been applied to a 28 V, 230 W LDMOS PA to cover the RF bandwidth...
Test case prioritization technique is an efficient method to improve regression testing activities. It orders a regression test suite to execute the test cases with higher priority earlier than those with lower priority, and the problem is how to optimize the test case ordering according to some criterion. In this paper, we have proposed an algorithm which prioritizes the test cases based on ant colony...
Object recognition is one of the most popular tasks in computer vision. Various works have been reported in recent years. Bag of visual words (BOVW) is shown to be an effective model for this task. BOVW extracts features or visual words from the whole image. However, we know there are two kinds of information in an image: objects and background. Obviously, the features in the objects and background...
A 25 W, dual-path, two-stage wideband RFIC power transistor covering 2.3 to 2.7 GHz band and targeting driver and small-cell application has been developed using the latest generation of LDMOS technology. Design techniques used to achieve wideband, flat gain, compact footprint, and improved isolation are discussed. A class AB driver prototype achieved more than 30 dB gain from 2.1 to 2.8 GHz with...
As a high-tech industry, the development of the Internet of Things industry plays an important role in the industrial transformation and upgrading of a country. In light of the six elements of the “Diamond Model”, this paper constructs an indicator system to assess the competitiveness of the Internet of Things industry. Using a comprehensive evaluation method which combines Gray Relational Analysis...
In this paper we present a novel data miming approach to predict long term behavior of stock trend. Traditional techniques on stock trend prediction have shown their limitations when using time series algorithms or volatility modelling on price sequence. In our research, a novel outlier mining algorithm is proposed to detect anomalies on the basis of volume sequence of high frequency tick-by tick...
The objective of this paper is to derive DEM and DHM in tropical forests based on the technology of multi-baseline InSAR tomography, focusing on the requirement of the minimum number of flight tracks. The experiments were carried out on P-band HH polarization airborne multi-baseline InSAR data over the site of Paracou, French Guiana, during the European Space Agency campaign TropiSAR 2009. Tomographic...
Exploits diagnosis requires great manual effort and desires to be automated as much as possible. In this paper, we investigate how the syntactic format of program inputs, as well as reverse engineering of data structures, could be used to identify overwritten data structures, and propose a binary-level exploit diagnosis approach, deExploit, that is generic to attack types and effective in identifying...
Coverage-based fault localization techniques leverage coverage information to identify the suspicious program entities for inspection. However, coincidental correctness (CC) widely occurs during software debugging, and brings negative impact to the effectiveness of CBFL techniques. In this paper, we propose a regression approach to identity CC execution with weighted clustering analysis. Based on...
Water Cherenkov Detector Array (WCDA) in the Large High Altitude Air Shower Observatory has been proposed to survey gamma ray sources. The WCDA consists of 3600 Photo-Multipliers (PMTs) under water and the signals of PMTs would vary from 1 photo electron (P.E.) to 4000 P.E. In this paper, we propose an analogue front-end Application Specific Integrated Circuit (ASIC) prototype which is fabricated...
The intrinsic a-Si:H thin film is the key to the high efficiency heterojunction silicon solar cells. The transient instability after plasma ignition decreases the minority carrier lifetime of passivated silicon wafer at the same deposition process. The capability to passivate the silicon surface of a-Si:H thin films deposited at different hydrogen flow rate is investigated. The results show the passivation...
We introduce a microstructure model that consistently correlates the microstructure of nanocrystalline silicon oxide (nc-SiOX:H) to its optical and electrical properties. We successfully validated the model by means of a large quantity of systematically and individually optimized n- and p-doped nc-SiOX:H films deposited at very high frequency (VHF) and radio frequency (RF). In particular, this model...
In order to meet the demands of high efficiency and a wide adaptable range of input voltage, a DualOperation Mode half-bridge LLC converter which can operate in two different modes according to the level of input voltage is obtained by adjusting the driving control strategy of 3-level LLC resonant converter, and the adaptable range of input voltage is doubled with the same parameters of resonant tank...
The main theme of this paper is to propose a novel peak current mode control method to reduce the loss of phase-shifted full-bridge (PSFB) converter under light load condition. The proposed control method can adjust the switching frequency of the converter to keep the on-time of switches fixed. According to the loss analysis model in discontinuous current mode operation, the switching frequency is...
During the running of nuclear power plant, corrosion products and impurities will be migrated from the secondary circuit to the steam generator. Some of them will stay inside the steam generator as sludge and they will gradually deposit on tube plate, the upper part of support plate, surface of tubes and the gap between the support plate and tubes. These sludge will be deposited on the surface of...
Graph Pattern Matching (GPM) plays a significant role in social network analysis, which has been widely used in, for example, experts finding, social community mining and social position detection. Given a pattern graph GQ and a data graph GD, a GPM algorithm finds those subgraphs, GM, that match GQ in GD. However, the existing GPM methods do not consider the multiple constraints on edges in GQ, which...
Outsourcing database to clouds is a scalable and cost-effective way for large scale data storage, management, and query processing. Trajectory data contain rich spatio-temporal relationships and reveal many forms of individual sensitive information (e.g., home address, health condition), which necessitate them to be encrypted before being outsourced for privacy concerns. However, efficient query processing...
In order to reduce the dispersion of the conventional HO-FDTD (2, 4) method, the axes-optimized method has been provided. This paper mainly discusses the optimization of the weight parameters based on the numerical dispersion equation. The numerical examples have been given to demonstrate the optimized HO-FDTD (2, 4) method. It has been found that the dispersion error can be eliminated in the axial...
Evidence-based practice has become the cornerstone of high quality clinical care. However, producing evidence of sufficient quantity and quality is hampered by the high cost and complexity of conducting research, the numbers of clinicians and patients willing to participate in clinical trials. The Learning Healthcare System initiative creates routes for knowledge transfer between different parts of...
In recent years, Location-Based Services (LBSs) have been widely applied, and many websites provide LBSs which allow users to make trip planning with multiple activities on the Trip to meet their different demands (e.g., Distance, location, service, etc.). However in most studies, trip planning just focuses on finding the shortest trip that goes through many services during visiting many locations...
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