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Recently, a new class of decentralized random coded caching schemes have received increasing interest, as they can achieve order-optimal memory-load tradeoff through decentralized content placement when the file size goes to infinity. However, most of these existing decentralized schemes may not provide enough coded- multicasting opportunities in the practical operating regime where the file size...
Accurate classification and recognition of pulmonary nodules is an important and key process of Computer-Aided Diagnosis (CAD) system in lung cancer diagnose. Although it has become an increasingly popular research topic, it remains a lot of scientific and technical challenges. Not only do we lack the accurate and effective algorithm of recognition and classification, but also we have difficulties...
Visual codebook based quantization of robust appearance descriptors extracted from local image patches is an effective means of capturing image statistics for object classification. A codebook is usually constructed by using a cluster method such as k-means at object level or image level. The codebook is global. For fine-grained categorization and recognition problems, however, the global object-level...
As an efficient method, the dictionary compression approach has attracted much interest and been widely used in column-oriented database systems. The core idea is to represent a longer string by a shorter integer, which significantly reduces the size of data and then improves the input-output (I/O) performance. To further reduce the space overhead of the dictionary compression method based on static...
This paper investigates the vehicle routing problem (VRP) under multi-objective constraints. More specifically, we consider the distance, fixed cost, time, together with risk simultaneously. To get a quicker and more accurate solution, several improvements are proposed in applying GA for optimization search. Practical test confirms the effectiveness of the proposed method.
In this paper, we propose the multi-level physical-layer network coding (MPLNC) for two-way relay channels (TWRC) to optimize the relay performance. In the proposed MPLNC scheme, each source node involves multiple linear binary codes for encoding, one per modulation level. The relay node receives these streams of signals and attempts to decode superimposed network codewords at each modulation level...
The application of machine learning algorithms in wireless communications has attracted increasing attention due to the promising performance gains recently achieved. Static classification algorithms have been successfully applied to training protocols that adapt transmission parameters according to context information. However, in reality, there are many time-varying reasons for fading channel quality...
Amomum villosum Lour. (officinal name Fructus Amomi) is one of the most well-known and authentic herbs in South China. Monoterpenes in its volatile oil are the main medicinal compounds. The condensation of pyruvate with D-glyceraldhyde-3-phosphate to form 1-deoxy-D-xylulose-5-phosphate (DXP) catalyzed by DXP synthase (DXS, EC: 2.2.1.7) and the conversion of DXP to 2-C-methyl-D-erythritol-4-phosphate...
Timetabling Problem (TP) relates to quality of education and the utilization of teaching resources with the further reform in teaching and growing expansion of recruitment scale in colleges and universities. Firstly, TP was detailedly analyzed, includes: timetabling objective, main influencing factors, constraint conditions and solving target. And then, an optimized mathematical model of TP was established,...
In this paper, we consider a two-way asymmetric relaying channel with unmatched traffics from two sources. Aiming at maximizing the sum rate under a minimum rate constraint, we address the optimization problem (in terms of time and power allocation) for two decode-and-forward (DF) strategies, namely, the decode-and-forward with joint modulation (DF-JM) and the decode-and-forward with network-superposition...
We consider a two-way relay system where two sources exchange information with the assistance of multiple, non-cooperative, relay nodes. Specifically, we propose a capacity upper bound for the two-way relay channel and derive the achievable regions for different relay strategies, such as the amplify-and-forward (AF), the decode-and-forward (DF) and the compress-and-forward (CF). Furthermore, the upper...
Energy efficiency is one of the primary concerns when designing routing protocol in wireless sensor networks (WSNs). In this paper, we design an opportunistic multi-path routing protocol (RANC) using network coding technique facing the realistic link in WSNs. RANC uses Reality-Aware Network Coding technique to reduce energy consumption. During the encoding process, the local topology, the LQI between...
This paper analyzes high-speed interface simultaneous switching jitter (SSJ) and mathematically describes methods for reducing SSJ in number, spatial, time, and frequency dimensions. Quantitative relationships between SSJ and its major sources — SSO crosstalk, driver PDN SSN, and pre-driver PDN SSN — are discussed. Firmware and hardware methods for SSJ reduction on die, on package, and on PCB from...
A fast mode decision algorithm based on probability and statistics for H.264 intra prediction is presented to reduce the computation complexity of the H.264 encoder. By using TF-IDF algorithm which is based on training sequences of the best prediction modes of 4×4 blocks, test sequences of the best prediction modes of 4×4 blocks can be predicted using few intra modes which are obtained from TF-IDF...
This paper describes the simultaneous switching noise (SSN) behavior of pre-driver power distribution networks (PDNs) excited by different kinds of simultaneous switching output (SSO) signal patterns. The physics behind the PDN resonance is explored and the quantitative relationship between pre-driver PDN resonant frequency and signal toggling frequency is established to find the SSO signal pattern...
Wireless infrastructures can be conveniently categorized into two types: those that provide point-to-point 'unicast' connectivity (e.g., cellular) and others that are 'broadcast' in nature (such as TV and radio) and are inherently point-to- multipoint. This paper introduces a transmission scheme for multicarrier hybrid system that supports both broadcasting and unicasting on a single-frequency platform...
Multiview Video Coding (MVC) standardization is an ongoing effort aiming to extend H.264/AVC by developing novel tools optimized for 3D and multiview video use cases. One of the key identified requirements for the MVC standard is its ability to support parallel processing of different views. The parallel operation is known to be especially important for 3DTV applications, where the display needs to...
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