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Solar energy has the characteristics of intermittent and unstable, and it results in the negative impact on power quality of the utility grid while the penetration rate of the grid-connected photovoltaic generation system is increased. The energy storage system (ESS) can alleviate the negative impact on power quality of the utility grid so as to increase the penetration rate of the grid-connected...
To solve the test problems of alarm module used for CRH axle temperature monitoring system of the CRRC Qingdao Sifang CO. LTD., this paper analyzed the limitations of traditional debugging method (heating the temperature sensor area with a hot-air gun): long time for heating up, low efficiency. This paper takes the digital potentiometer as the temperature compensation component. We can change the...
In view of the problem of the traditional air brake limitation, this paper puts forward a kind design for car control device (car control device, CCD) which uses the Microchip company's master control chip DSPIC30F6011A and Echelon company's power line smart transceiver PL3120. This design combined with the hardware circuit and software design experience at home and abroad advanced, the joint modeling...
By analyzing physical connection of cognitive radio network, underlay color-sensitive graph coloring (UCSGC) model which is used in underlay spectrum allocation is proposed here. After analyzing, color-sensitive graph coloring (CSGC) is a special UCSGC. Under the model, this paper gives an Optimized Genetic Algorithm (OGA) to maximize the benefits of the network. The algorithm not only is convergent,...
Electroencephalography (EEG) is an important bio-potential and has been widely applied in clinical applications. In particular, recent advances in EEG monitoring technologies pave the way for wearable, wireless, flexible EEG monitoring devices. However, current EEG systems require EEG electrodes with conductive gels (wet electrodes) to acquire EEG signal and then transmit these EEG signal to the back-end...
The goal of service recovery is to make immediate response when service failures result in customer dissatisfaction or complaints. However, it is difficult to detect service failures and customer dissatisfactions easily because customers might not express their true reception. Hence, this study builds a logistical regression model to detect the effectiveness of service and provide service recovery...
In this paper, the design and implementation of a new control strategy for single-stage Vienna-type PWM rectifiers are presented to achieve high DC-link voltage utilization and high power density on the premise of high power factor (PF). The rectifier system is design for all-electric aircraft which has lower high voltage DC (HVDC) bus compared with the grid. At first, the three-phase three-wire non-regenerative...
This paper presents fuzzy tracking control design for nonlinear systems. Considering not all states of the nonlinear system are fully available or measured while Takagi-Sugeno (T-S) fuzzy model is used to represent the dynamic of nonlinear system, a fuzzy observer-based fuzzy controller is developed to reduce the tracking error. This case yields a disturbance when designing tracking control, so H¡Þ...
With the development of the mobile networks, mobile payment provides a convenient way for the transactions in e-commerce. in this paper, we propose an efficient mobile payment model and its two applications. in the proposed model, mobile operator provides the mutual authentication and anonymity between a merchant and a customer. Because mobile operator is a credible center on mobile networks, the...
The paper presents a verifiable visual cryptography (VC) scheme for checking the validness to the shares engaged in a VC decoding instance. the idea is to stamp a continuous pattern on the shares belonging to the same secret image, and a part of the pattern can be revealed through aligning and stacking half of two shares together. the visual coherent among the revealed patterns of all pair of shares...
The service adaptation mechanism is one of the key issues in ubiquitous network. However, most of the proposed approaches of service adaptation are either not context-aware or based on a specific definition of context in specific environment. This paper presents a context-aware service adaptation mechanism under ubiquitous network relying on user-to-object, space-time interaction patterns which helps...
The service continuity mechanism is to provide multimedia application with seamless multimedia experience over multiple networks (Wifi, 3G, Wimax, LTE) as well as multiple devices (mobile, PCs, PDA, Settop box) in ubiquitous network. However, most of the proposed approaches of service continuity are either not adaptive resources provisioning or based on a specific definition of context in ubiquitous...
We present a context-aware architecture that supports seamless coordination and management of hardware devices through adaptive services. The context-aware architecture will trigger intelligent and automatic services according to the context information (user context, environmental context, context computing). This paper proposes the architecture supports context management, location tracking, selection...
With the rapid development of wireless broadband services and the steady advancement of ubiquitous network, there is a rising demand for multi-homed network sites to provide services. Mobile Stream Control Transmission Protocol (mSCTP) is ideal to provide vertical handover (VHO) feature by enabling a mobile client to freely switch between IP addresses acquired in different networks. Concurrent Multipath...
Jatropha oil is a promising raw material for biodegradable lubricant since it is a non-edible vegetable oil produced from the seeds of the Jatropha curcas, a plant that can grow in marginal lands, and does not compete for the food production with human or for land with food. But there are few relative studies and reports so far. In this paper, samples of Jatropha curcas seeds are tested to investigate...
This paper reports a high-frequency AC drive fed by VF-input one-stage AC-AC converter with a compact design. The converter/drive is capable of operating a wide range of input frequencies, 360 – 720 Hz, with desirable power quality control, resulting low input line harmonics and high total power factor. The modular phase bank design for power circuit obtains desirable high power density. Digital control...
The mixture of aqueous ethanol and ionic liquid (IL) 1-butyl-3-methylimidazolium bromine ([Bmin]Br) was used to treat woody biomass, and different analysis methods such as 1H-NMR, GC-MS, HPAEC, and FTIR were used to determine the efficiency of separation and the products. It is shown that macromolecules of lignin were degraded and dissolved into the solvent mixture, and were separated by adding anti-solvent...
Physical and social systems can be conceptualized in complexity theory which provides a framework for a refined analysis of local effects on global behaviors. And spatial dynamic models based on discrete time can be referred to as cellular automata (henceforth CA) models, which show advantages for modeling complex systems in a way that is conceptually clearer, more accurate and more complete than...
In order to provide the services for the users efficiently and select suitable SP and the service automatically according to the user's preference and habits when using the service, the paper apples the context-aware technology to the Service Selection Platform and picks out the Context-aware Service Selection Platform is proposed. The method is using the exiting Context-aware architecture to obtain...
This paper introduces and formally defines a distributed policy-based agent framework and algorithm for the real situation of diverse needs. This framework is based on CP-nets and personalized based on user preference database. Using the user own preference and other user preference, this architecture provides an algorithm for calculating user preference. The model has been validated in test environment,...
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