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Water vapor is a highly variable parameter in atmospheric processes and it plays a crucial role in atmospheric motions on a wide range of scales in space and time. GPS technique has been widely used in retrieving precipitable water vapor. Firstly the article has retrieved precipitable water vapor of Qinhuangdao and Shijiazhuang stations by GPS technique. Then it has researched two aspects of precipitable...
Wireless sensor networks consist of various sensor nodes which operate in a memory, energy and bandwidth constrained environment. Target tracking is an important application in wireless sensor networks and in this paper we propose an energy aware target tracking (EATT) algorithm. Energy efficiency is obtained due to the novel concept of tracking being performed in a collaborative manner by different...
This paper proposes an efficient ubiquitous teaching and learning model in Economics and Management Specialty of the University. Recent educational environment is growing to ubiquitous learning (u-Learning).This paper analysis the current condition of the u-learning model applied with modern information technology that used in the field of economics and management experimental teaching, and points...
Embedded systems use many complex bus protocols for data transfer because of the merits of shared resources, low cost of implementation and high performance. Bus bridges are used for conversion and communication among these protocols. This paper describes the formal verification of the Petri Net models of bus bridge using model checking techniques. Typical structure of the bus bridge is introduced...
In this paper, we analyze how humans can solve problems quickly by the process of solving the problem of convex hull. Then we present the M2M (Macro to Micro) data structure which maintains a finite set of n points in the plane under insertion and deletion of points in amortized O(1) time per operation and O(n) space usage. In addition, as the insert operation of each point is independent, the algorithm...
In this paper, the authors discussed in detail about the framework of integrating Radio Frequency Identification (RFID) with Building Information Modeling (BIM) technologies. The proposed framework can be used in the computer-aided design, manufacturing, engineering, and installation processes. In specific, this paper explained how to use RFID technology for structural steel components, such as a...
Blasting occupy an important position in exploitation of mineral resources. With the development of mining and Geographical Information System (GIS) in mining industry, Digital Mining (DM) and Digital Blasting are becoming the research focus and they will be an inevitable trend in the future. In order to evaluate the incidental influence caused by blasting and accomplish the simulation, a blasting...
Combining system dynamics (SD) and the principle of hydrocarbon migration-accumulation (HMA), on the basis of corner point grid model (CPGM), this paper simulated HMA of Dongying depression maturing exploratory area adopting the labyrinth migration mode. The simulation results meet the needs of practical exploration. Thus, a reliable tool is provided for the immature exploratory area while decreasing...
With the increasing demand for the application of future simulation technology and virtual reality, the virtual environment modeling techniques will become increasingly important. Three dimensional terrain is one of important factors of the natural scenes in virtual environment and it is also a significant composition of view system in virtual simulation field. Firstly, this paper describes the research...
In this paper, we consider the advantage of particle system to simulate the real-time fountain model, and make use of the Possion distribution to get the probability of the special number of the particles which collision happened and the average number of particles which the collision play out. In addition, we present a new approach from the perspective of the energy of the particles to judge whether...
DNA sequence comparison remains as one of the critical steps in the analysis of phylogenetic relationships between species. In order to get quantitative comparison, we want to devise some mathematical descriptors that would captur the essence of the base composition and distribution of the sequence. In this contribution, we take the DNA sequence double helix into account, and introduce a mathematical...
Power consumption of computing systems has become an important issue in industrial design areas. Dynamic power management (DPM) is an effective way to low the system power. This paper presents a new expert-based heuristic algorithm with fine-grained delay constraints (FDC-DPM), which selects the best policy from a set of well-known policies dynamically. Three rules are presented for FDC-DPM to make...
The aim of this study is to describe the effects of harmonic noise on the complexity measure of nonlinear dynamic systems by numerical simulation. Four types of nonlinear time sequences are superimposed by harmonic noise. The complexity measures of all sequences are calculated and analyzed. By the experimental and statistical results, the value of the complexity measure of the sequence is decreasing...
Along with the development of service industry and rapid growth of call volume in call center, traffic forecasting of mobile communication has become to be an urgent and significant issue especially when people are more and more concerned about customer service online. Based on the previous forecasting methods and thinking, this paper uses exponential smoothing model to forecast long term volume prediction-month...
SOA is a new kind of architecture design for system development. It can solve heterogeneous problem by decomposing software services module and integrating service module. Traditional logistics information system has poor scalability and reusability, it is easy to form information islands. E-business logistics information system based SOA provide an ideal framework for design and implementation of...
This paper presents a low-complexity C8PSK HART receiver structure that can adaptively demodulate input signal modulated in non-coherent HART FSK or coherent HART C8PSK. Spectrum leakage and barrier effect, which are defects of windowed DFT when used to analyze signal spectrum, are employed to perfectly solve both problems of channel estimation and signal identification. In order to lower power consumption...
In designing some UWB-IR (ultra-wideband impulse radio) devices, the effects of ground echoes must be taken into consideration. The dispersion of soil and roughness of ground surface are significant factors in ground echoes calculation. FDTD (finite difference of time domain) algorithms applied in ground echo simulation at present have the problems of slow speed or large errors. By using multi-pole...
Due to the perfect management of hospital information system, the hospital staff could draw a better heal scheme for patients with the whole information when they take care of them. And hospital information in the medical environment has also played a key to the role to make patient have a convenient and efficient medical environment. These are the strong protection for the hospital flinty competition...
As a substitute for conventional diesel, biodiesel has received considerable attention in many countries. To investigate the emissions of an engine by experiment is time-consuming and costly, so a lot of mathematical models are used to predict the emissions of engines. A back propagation (BP) neural network was used to establish an emission model of the diesel engine fueled with biodiesel The results...
In order to solve the “labeling bottleneck” problem of short text categorization, a novel Semi-Supervised Expectation-Maximization short text categorization method based on Random Subspace (RS-EM) is used in this paper. RS-EM performs an iterative EM style training where multiple models are trained on subsets by using random subspace method. This combination of the stochastic discrimination theory...
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