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Hyperdoping silicon with transition metals offers the potential of subbandgap photodetection, but metal impurities can be difficult to kinetically trap. Instabilities during solidification introduce large length-scale defects. We present guidelines for avoiding these instabilities, and electronic properties for layers that do not exhibit them.
Two typical frequency offset acquisition schemes by measuring the phase difference between two received signals on different samples are proposed in this paper. A new aspect on the problem of how to choose a better method to estimate the frequency offset between two schemes is the key research content. In order to find out how many factors the frequency offset estimation accuracy is determined by,...
The application of LTE to the machine-type communications (MTC) poses some serious challenges due to the large performance mismatch between the regular LTE user equipment and the MTC device, caused mainly by the physical limitations of MTC devices. This paper addresses these limitations and their implications to the communication signal's link performance and the corresponding link budget. The focus...
Coding and decoding schemes are critical to the performance in wireless communication system. In Current coding scheme of LTE system, each transport block (TB) is segmented into several code blocks (CBs) which can be coded and decoded individually. If one of the CBs in a TB fails in decoding, the whole TB is required to be retransmitted. Channel estimation is very crucial for the correctness of the...
This paper describes a practical peer-to-peer (P2P) communication architecture applied to the conventional cellular network. It enables efficient coexistence of P2P connections with cellular connections while sharing the same wireless spectrum. The design achieves both proximity discovery and P2P communication under a cellular architecture with a particular emphasis on building an RF blueprint that...
Differential codebook precoding is known as a capacity-achieving precoding scheme when the channel variation is slow. However, at medium to high channel variation speeds the differential codebook optimized for low channel variation speeds performs poorly compared to other precoding schemes, thereby limiting its application to practical systems. In this paper, we apply an alternating codebook technique...
The FCC new regulation for cognitive use of the TV white space spectrum provides a new means for improving traditional cellular network performance. But it also introduces a number of technical challenges. This paper studies one of the challenges: given the significant differences in the propagation property and the transmit power limitations between the cellular band and the TV white space, how both...
As the growth of Internet, Cloud Computing, Mobile Network and Internet of Things is increasing rapidly, Big Data is becoming a hot-spot in recent years. Big Data Processing is involved in our daily life such as mobile devices, RFID and wireless sensors, which aims at dealing with billions of users' interactive data. At the same time, real-time processing is eagerly needed in integrated system. In...
In this paper, we review the signal-to-leakage-plus-noise ratio (SLNR) transmit precoding criterion and the active antenna selection (AAS) strategy in a multi-user MIMO system. We then address the limitations of the original SLNR and AAS schemes and provide a solution that generalizes the SLNR precoding model by incorporating the antenna-receiver structure into the optimization process to further...
In unreliable communication environment, an efficient motion vector (MV) recovery method is proposed in this paper for video temporal error concealment (TEC) with H.264/AVC standard in order to provide better quality. To increase the accuracy, 4'4 block size is regarded as the basic operation unit in the proposal. Furthermore, the detailed processing procedures of the proposed algorithm for 3 packet...
Compared with 2D video, 3D video could bring the immersive and realistic experiences. So the 3D technology is a research topic following the voice, data and 2D information technology. For this technical study, video quality assessment is an essential section to measure the performance of 3D processing technology. In this paper, we propose an efficient video quality metric (VQM3D) to evaluate the quality...
This paper mainly analyses Linux Security Module (LSM) and Virtual Filesystem of Linux. Based on the LSM security field & hooks, the method of marking subject and object sensitivity label is designed and implemented on Linux 2.6.26. This system meets GB17859–1999's requirements. In a simplified environment, it is completed that the system implements subject and object sensitivity label according...
In this paper, an efficient Full-Reference (FR) video quality metric for evaluating the quality of three-dimensional (3D) video generated by Depth Image-Based Rendering (DIBR) technology is proposed. The proposed color quality metric (CQM) is presented by availably using the color video and rigorous mathematical algorithm. The experiment shows that the proposed color quality metric has a better correlation...
We report the preparation and field emission characterization of the chemically-reduced graphene oxide (RGO) thin film and the integration of the RGO films with the MOSFET for realizing the actively-controlled on the emission current. Physical mechanisms are proposed for interpreting the effect of the carbon-oxygen bonds on the field emission properties.
China is a major exporter of tea, Moroccan tea is also China's largest export market. Nearly three years in RMB exchange rate appreciation about 15% of our country, tea exports have far-reaching influence. In this paper, the RMB exchange rate movements on exports on the basis of the general principles and then building models, from the perspective of positivism analysis of RMB exchange rate on China's...
Laser gyroscope as a kind of photoelectric sensor, the static drift output data generally validate to be a non-stationary time series, and traditional Time Series Identification lacks dependable modeling precision. Analyzed the advantages of RBF Neural Network and SVM (Support Vector Machine), combined Wavelet Transform with ANN and SVM, studied the identification methods of WT-RBF (Wavelet Transform...
JDF (Job Definition Format) is an industry standard designed to describe job information and exchange data between different applications or systems in printing industry. According to the characteristic of JDF job ticket in XML (extensible Markup Language) format, the paper uses DOM (Document Object Model) interface in Java application to parse JDF document. The analytical result is stored in a relational...
This paper is devoted to study the problem of a partially dependent predator-prey model with time delay. The effect of delay on the stability of the interior positive equilibrium is investigated, and the conditions for existence of Hopf bifurcations are given. Finally, numerical simulations are carried out to illustrate our analytical results, the largest Lyapunov exponent is computed, and the chaotic...
The strong features of printing industry and production mode of order-driven make the complexity of the design of printing ERP system. On the basis of the status and characteristics of printing enterprises, this paper presents the demand analysis and builds a framework for ERP system in modern printing enterprise. The framework is divided into several parts to develop the B/S pattern printing ERP...
The digital production and information management represent the new development direction of printing enterprises. As the core of digital printing, job definition format (JDF) connects prepress, print, and post-press in a whole. As the core of information management, enterprise resource planning (ERP) system is the platform which integrates all resources of the enterprise and provides scheme or control...
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