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Logistics demand forecast has an important role to resource optimization and enterprise competitiveness. Grey forecasting model has features such as low sample requirements, high forecast accuracy, it is suitable for forecasting the logistics demand. However, the complexity of the calculation process hindered its promotion and application. This paper briefly introduced the theory of gray model and...
Large scale companies and institutions often have huge amount of electronic computing systems, these systems usually vary in hardware architecture, operating system and even network communication mode. They were built in different years, using different technology and platform, namely they are heterogeneous. How to maintain and upgrade these systems consistently is a big problem. This paper proposes...
In this paper, we have proposed a graph theoretic method for the use of the UTD (uniform theory of diffraction) in radio channel characterizations of urban environments. The method is based on 2-D graph theory, which is properly modified to yield 3-D ray trajectories. Multiple reflections and diffractions are considered through classifying multipath components into four different categories. The adoption...
To satisfy the need of electrolyte tests of Automatic Biochemical Analyzer, a flow injection dynamic ion analysis method was proposed based on method and experiments, this new method combined the advantages of Flow Injection Analysis (FIA) and Ion Selective Electrode (ISE). With embedded technology, we developed a new electrolyte module and the clinical trials show that the electrolyte module meets...
Quantum computation and quantum information have recently become an extensively studied topic. In this paper, we give some matrix expressions and transformation method for 2-level quantum logic gates, which can make implementation of 2-level quantum logic gates easily and improve the efficiency of binary quantum circuit synthesis.
Video face recognition has become one of the most active research direction in the field of face recognition. In this paper, the influence of the illumination and the posture was analyzed and the corresponding solution was designed. Through the combined face recognition algorithm of global features and local features based on the wavelet analysis, as well as the Hidden Markov model using as the post-processing,...
In this paper, an improved video encryption method based on coupled logistic chaotic map is proposed. In it, the method adopts coupled chaotic logistic maps as the key-stream generator to encrypt the DCT (Discrete Cosine Transform) coefficients of the video frame. In the whole process, the new method can provide the pseudo-random sequence with good randomness. Therefore, these systems are suitable...
Multi-target tracking in video sequences is a difficult problem when most objects have very similar appearance and objects are close to each other in the image. The paper proposes a new approach to handling these problems by incorporating the target structure information. The structure information of a target is represents by a part-based model which contains appearance measurement and spatial constraints...
A single-base-station ultra-wideband (UWB) positioning system with a circular antenna array is given in this study. MUSIC algorithm and pulse amplitude measurement are employed to achieve accurate distance and angle measurement for precise positioning. Compared with the traditional correlation function algorithm in dense multipath environments, MUSIC algorithm has high multipath resolution capability...
A Cross-layer Data Gathering(CDG) protocol for wireless sensor networks is presented in this paper, the protocol includes a clock synchronization algorithm that balanced precision and energy consumption, and a cross-layer data gathering algorithm that fuses Media Access Control(MAC) and routing strategy. Simulation results show that CDG effectively prolongs the network lifetime and reduces the communication...
Intelligent light control system is one of major application of smart home. In this paper, a way to construct intelligent light control system is introduced, advancing a new and practical design of intelligent system base on the latest Zigbee Light Link standard which is set by Zigbee alliance. The system is composed of three main components: (i) gateway module; (ii) LED bulbs; (iii) client application...
The task allocation is important part of cooperation behavior modeling. It's influenced by communication and combat capability. According to the existing study, our task allocation model chooses the strategy of agency communication to expend communication network. We use iceberg model to classify the combat capability, and propose the method based on entity comprehensive capability and strategy of...
Delay Tolerant Networks (DTNs) are new solutions that can cope with hash conditions and span across multiple networks. In these networks, end-to-end connectivity is intermittent. DTNs enable user devices to self-organize to connect to functional base station or other users through multiple hops. In traditional DTNs, they are assumed to be willing to help other nodes for packet forwarding. But in the...
In communication system products, quartz oscillators are widely used and develop rapidly. OCXO (Oven Controlled Crystal Oscillator) is commonly used in the area of military and civilian communicational equipment, radar navigation test, electronic equipment, home appliances, GPS, automobile electronics, computer equipment, and so on. Crystal oscillator has many specifications and properties, and temperature...
This paper describes the blind channel equalization for constant modulus algorithm mathematical model and principle. Focusing on the CMA blind equalization slow convergence and convergence error, the paper analyzes and simulates recent years' constant modulus algorithm and improved algorithm based on residual error and leak CMA nonlinear transformation algorithm. The results show that, compared with...
System-call is the interaction interface between operation system and uses program. Program runs without system calls. in this paper, Analysis of linux system-calls on the ARM processor implementation principle, Describes the structure of the system-call, Involving the four main contents of Kernel files made some references, Combined with a simple example to illustrate the linux system-calls based...
Video encryption is an important field. It has been recently rapidly used in many multimedia systems. The proposed method is focusing on H.264/AVC [1] [2] video coding standard. Several encryption algorithms are based on intra frame/slice had been utilized. The drawbacks of previously used algorithms is that they are vulnerable to known plaintext attack, the increase of stream size, they can't handle...
In this paper, we present a site-based and resource-constrained project scheduling problem with generalized precedence relation (SRCPSP-GPR) by extending the RCPSP-GPR, in which the site constraints are considered to minimize project durations. After formalizing the SRCPSP-GPR, we give three concepts, i.e., Same-site activities, SubNet and Combined-SubNet, based on the precedence and site constraints...
With the increasing demand for high resolution, large scale images and fast downlink data rates of remote-sensing satellites, the higher decoding speed of BM(Berlekamp Massey) algorithm of the satellite receivers employing RS(Reed Solomon) codes as forward error correction codes is needed. A new improved BM algorithm is presented and its explicit proofs are given. Taking RS(255, 223) of CCSDS standard...
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