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E-Service related technologies have a profound and revolutionary impact on many traditional areas. We try to outline its influence on economics which we call E-service Economics at fundamental level. We model the new characteristics of this trend along two themes: value driven decision making which covers both reuse based value added analysis and service value broker (SVB) pattern which embodies the...
We identify that to improve the reusability of implementation in service engineering, we need to collect and modulate reusable strategy, knowledge and experience crossing business modeling, knowledge management and economic analysis simultaneously from an interdisciplinary perspective. Strategically to ease the complexity, we adopt the existing experience from design patterns by forming a service...
Free space optical (FSO) networking is an attractive technology with applications ranging from high capacity military communications to “Last-mile” broadband access solutions. Topology control is an important problem in FSO networks. The problem of building a spanning tree when number of transceivers on each base station is limited, in FSO networks, is NP-hard. What makes the problem even more challenging...
Multi-node decode and forward protocol(MNDFP) can be used to improve transmission performance and expand coverage. However, in traditional MNDFP, the number of cooperative nodes(relays) is fixed, regardless of the Channel Quality(CQ). In this paper, we proposed a selective strategy for MNDFP, which can adjust the amount of cooperative nodes adaptively based on the CQ. We give the closed-form expression...
We demonstrated a femtosecond pulse driven electron-impact method to efficiently enhance the intensity of filament-induced neon and helium fluorescence emission. Such an all-optical method holds the potential applications to improve the sensitivity of laser-induced breakdown spectroscopy.
This paper presents a new methodology for synthesizing the transfer impedance of shielded cables in simulation program with integrated circuit emphasis (SPICE). Compared to the traditional models that use lumped equivalent circuits, the new modelling method uses the flow chart of the z-Domain discrete transfer function directly in SPICE and the process of calculating the equivalent circuit parameters...
Although the technology of femtocells is highly promising, many challenging problems should be addressed before fully harvesting its potential. In this paper, we investigate the problem of cell association and handover management in femtocell networks. Two extreme cases for cell association are first discussed and analyzed. Then we propose our algorithm to maximize network capacity while achieving...
Surface-enhanced Raman scattering (SERS), as a powerful tool of chemical and biological analysis, has been investigated extensively in recent years. In this work, the reduction of silver nitrate by copper foil in aqueous medium was used to prepare silver nanoparticles and a method of applying ultrasonic to passivate the copper foil in the sulfuric acid solution was proposed in order to regulate the...
Radio communication has come a long way from the initially deployed 1G voice (Amps) to modern 3G and 4G networks. A technology that holds promise to provide the next leap in peformance is femtocell. Femtocell technology brings the network closer to the user by adding smaller cells, which provide the benefit of higher quality links and more spatial reuse. To fully exploit this diversity realized at...
Subtractive clustering based methods have been well known for data clustering problems. However, Due to the computational demands of these approaches, clustering for large scale datasets such as spatiotemporal data and images have been slow to appear. A novel subtractive clustering method based on NystrÖm approximation is proposed. The contribution of proposed is a method that substantially reduces...
As a rectangular enclosure with apertures can be represented by a waveguide with its termination short circuited, the shielding effectiveness of the enclosure is calculated by the transmission line model. The voltage along the transmission line is obtained analytically, and the calculated shielding effectiveness fits well to the previous reference. Slots in different shapes are discussed, and multimodes...
Shielding effectiveness test is a typical application of nanosecond high voltage pulse. A Compact High Power Pulsed Simulator for the shielding effectiveness is developed. To obtain fast rise time of pulse voltage, a switch has to have low inductance. A liquid gap switch has this property. This switch operates with fixed anode, cathode and a removable trigger electrode. The switch gap is filled with...
The high-power electromagnetic (HPEM) environments pose dangerous threats to the electronic systems, especially the civilian infrastructures. So the system-level electromagnetic (EM) effects have abstracted more and more attentions. As an example, the susceptibility of the microcontroller system is investigated by the pulsed current injection (PCI). The setup and procedure of the testing are presented...
This paper proposes a model for analysis of life cycle cost (LCC) of the transmission systems. First, to build the model of LCC of the transmission systems, the whole LCC process of components is divided into five costs, i.e., initial cost, operating cost, maintenance cost, fault cost and disposal cost. Second, during the calculation of the maintenance cost, the grey system theory is employed to predict...
This paper addresses the life cycle management (LCM) problem for asset of smart grids. The costs of different stages during asset life cycle are integrated into a coherent framework. The real option theory is employed to quantify different strategies of LCM. The stochastic risks during the whole process of asset utilization are considered. The whole process of the asset investment, utilization and...
A new large-signal I–V model for GaN HEMT is presented in this paper based on the operational principle of devices and the traditional Angelov nonlinear I–V model. The least squares method and genetic algorithm are used to optimize the parameter extraction, and MATLAB is used to realize it. The simulation result fits well with the measured data, and the extracted model parameters have certain physical...
With the rapid development of Electronic Commerce, the society requires an increasing number of Electronic Commerce talents. The main task of higher vocational education is to provide for the society all sorts of talents with high application skills as soon as possible and serve the development of social economy. This paper analyzes the status of e-commerce professional training in higher vocational...
According to the energy-saving need for power distribution station, we design an energy-saving and intelligent control, remote monitoring system. The intelligent system includes central control unit, SF6 gas sensor, temperature/humidity sensor, air conditioning, dedicated exhaust fan, automatic windows, display terminal, etc. Hardware support is mainly based on Advantech's ADAM5510 PLC and uses C...
As a most frequently used and effective tool, control charts is an effective way for a company to improve product quality and productivity. It can also be used in monitoring the spare parts of equipment, preventing the equipment failure and reducing the maintenance costs. As the research object, the parameter of hazard rate is estimated by assuming that the hazard rate of spare parts obeying exponential...
During the recent years, several new automated monitoring systems for distribution network such as D-SCADA, Load-monitoring System and Intelligent Fault Indication system have been put into use in shanghai distribution network. These systems can measure and send the operating data of the distribution transformers and lines to the dispatchers in real-time. After intergraded analyzing the data supplied...
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