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With the sharp increasing demand of the indoor coverage and network capacity, dense femtocells are the ultimate target of the femto cellular network deployment in urban environment However, dense femtocell deployment could introduce excessive inter-femtocell interference (IFI). To address this problem, this paper proposes a distributed power self-optimization scheme for the downlink of dense femtocell...
Modeling is an important direction in systems biology. The target towards kinetic modeling for metabolic network is to develop a practical computational method which can handle incomplete parameters. In principle, we could start with a set of randomly chosen parameters; calculating fluxes and metabolites concentration and comparing with experiments; iterating until the best parameters are found. But...
Cognitive radio networks (CRNs) have emerged as a promising solution to the ever-growing demand for additional spectrum resources and more efficient spectrum utilization. A large number of routing protocols for CRNs have been proposed recently, each based on different design goals, and evaluated in different scenarios, under different assumptions. However, little is known about the relative performance...
Particle Filter can be used to fault diagnosis on systems with nonlinearities or non-Gaussian noise as a state estimation algorithm. Due to its characteristics to handle with discrete and continuous states simultaneously, particle filter has attracted much more attention to fault diagnosis on hybrid systems. Rao-Blackwellized Particle Filter (RBPF) is one of the efficient methods to this application...
The fault diagnosis approach based-on Bayesian network is frequently used in fault diagnosis field, has better completeness and explanation facility, but it has some disadvantages due to lack of the quantitative data information, and it is difficult to applied in complicated system, China train control system lever-3 (CTCS-3) is a complicated system with high security requirement, so a Bayesian fuzzy...
In order to improve the performance of the test efficiency and reduce the test cost,this paper is based on the data driven the thoughts and combined with the current mainstream test automation technology,putting forward a dynamic generation based on sequence control test thoughts of dynamic test automation method.This method considers the design of the testing progress optimization from both of the...
The traditional hazard analysis approaches applied to the socio-technical systems can not cover the complex organization structures, the interactions between systems and human behaviors, the interrelated factors among sub-systems and safety culture of specific societies. This paper presents the STAMP hazard analysis methodology based on formalization model (BFM-STAMP), which can solve the above issues...
Based on 1,130 valid questionnaires with new employees, this paper explores the mediating effect of person-organization fit between organizational socialization and work performance of new employees from the perspective of interaction between an organization and its new employees through factor analysis, descriptive statistics, correlation analysis, second-order confirmatory factor analysis, multiple...
Data from the Statistics of China's Migrant Workers Survey of 2011 indicates that, the amount of migrant workers goes up to 250 million people. However, they are faced with a lot of very serious problems. Using empirical data from a survey from several provinces (N=305), this study discussed the effect of direct supervisor's abusive behavior to employees' work alienation as well as the moderating...
J-TEXT COntrol, Data Access and Communication (CODAC) is an advanced control system designed for J-TEXT Lab. In J-TEXT CODAC, some critical functions is implemented by some specialized Plant System. Global Interlock System (GIS) is a specialized Plant System of J-TEXT CODAC, which is responsible for coordinate the Plant Interlock Systems (PIS), in order to protect the experiment personnel occupational...
To fully utilize the tokamak facility, it is necessary to allow researchers to remotely participate in the tokamak experiments via the internet. To be able to control the operation of the tokamak is one of the key. In this paper, the design and implementation of the remote control system for the J-TEXT tokamak is presented. To make this system flexible, instead of just providing software or web site...
High uniform current distribution, good endurance, and low 28 µW switching power are successfully achieved in Ni/GeOx/TiOy/TaN resistive random access memory devices on flexible polyimide substrate. The good performances are attributed to the nitrogen-rich TaN to increase the oxidation resistance and decrease the TaON and oxygen vacancies formation from x-ray photoelectron spectroscopy measurements,...
A novel Multi-Motion Synthesis technique is proposed in this study for fast and accurate computation of low-thrust trajectories. It decomposes the trajectory into three motions during a time interval: a simple conic arc due to the Sun gravity only, a constant acceleration motion due to the constant low-thrust, and a motion due to the variation of the Sun gravity caused by the low-thrust. The final...
Due to the individualistic nature of the femtocells and the uncertainty on the number and location of these devices, self-organization techniques play a very important role in successfully deploying and managing a large femtocell tier. This paper proposes a distributed power self-optimization scheme to suppress the interference and optimize the energy efficiency. First, the non-cooperative power self-...
In this paper, a novel joint resource allocation including sub-channel scheduling and power control is proposed for downlink multi-cell orthogonal frequency division multiple access (OFDMA) networks. We provide a utility function consisting of energy efficiency and interference pricing, in which power and sub-channel resources have been jointly considered. To reduce the complexity of the joint resource...
This paper presents a game-theoretic approach of power allocation in two-tier OFDMA femtocell networks. A dual-utility based non-cooperative game with pricing is formulated for effectively allocating power on each sub-channel, targeting at maximizing energy efficiency for each macro BS and protecting the SINR for each femto BS for customers' interests, under power constraints in each sub-channel....
Interference management is one of the most important issues in two-tier femtocell networks in which a central macrocell underlaid with several femtocell hotspots. To address the cross-tier and co-tier interference, this paper introduces an energy-efficient power control algorithm via convex pricing scheme, where both circuit and transmit power have been considered. To achieve the target SINR, the...
Due to large-scale and self-deployed of femtocells overlaid on traditional cellular networks, serious cross- and co-tier interference may arise without good coordination. To address this problem, this paper proposes a distributed power control scheme for the uplink transmission of two-tier OFDMA femtocell networks. Two models are considered: single-channel femtocell networks and multiple-channel femtocell...
This paper explores efficient 3G budget utilization in mobile participatory sensing applications. 1Distinct from previous research work that either rely on limited WiFi access points or assume the availability of unlimited 3G communication capability, we offer a more practical participatory sensing system that leverages potential 3G budgets that participants contribute at will, and uses it efficiently...
Femtocell is a promising cost-effective technology for enhancing indoor coverage with high-rate data. However, femtocell base station (FBS) is controlled by terminal users, the bursty interference caused by femtocell will greatly degrade the Quality of Service (QoS) of macrocell users (MUEs), and even cause their communication interrupt. To address this problem, this paper investigates a suite of...
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