This paper presents the principles of state-space average modeling of DC-DC Boost converters operating in the Discontinuous Conduction Mode (DCM) which occurs in converters due to low load current operation. The switching ripples in inductor current or capacitor voltage cause polarity reversal of the applied switch current or voltage and thus a zero current mode is reached. Modern converters ar...

As the most important node in public transport network, efficiency of a transport hub determines the entire efficiency of the whole transport network. In order to put forward effective transfer schemes, a comprehensive evaluation index system of urban transport hubs’ transfer efficiency was built, evaluation indexes were quantified, and an evaluation model of a multi-objective decision hub tran...

in this article, we have used 36 electricity distribution companies of iran and by using input-oriented dea, we analysis the companies technical efficiency with respect to group frontier and metafrontier following restructuring, then we investigate the factors affecting efficiency. the companies decomposed to two groups in terms of high and low circuit density. for discussing the impact of stru...

UNLABELLED BACKGROUND Total contact casting is regarded as the gold standard treatment for plantar foot ulcers. Load transfer from the plantar surface of the foot to the walls of the total contact cast has previously been assessed indirectly. The aim of this proof of concept study was to determine the feasibility of a new method to directly measure the load between the cast wall and the lowe...

Dynamic load balancing is one key adaptation mechanism often deployed in networking and computing systems. Numerous proposals exist for load balancing in P2P networks. All of them will enhance the availability of P2P system to some extent. However, their convergence rate is still low, and the load collection overhead and load transfer overhead are high. In this paper, we propose an ant-based lo...

A wireless power transfer system via magnetic resonance has been reported by several groups [1-3]. In those reports, two resonance coils work as a transmission coil and a reception coil, respectively. The transfer efficiency between two coils is a function of the distance and the orientation between the coils. When the distance between the two coils is long, the transfer efficiency is small. Wh...

The electroacoustic efficiency of high-power actuators used in thermoacoustic coolers may be estimated using a linear model involving a combination of six parameters. A method to identify these equivalent driver parameters from measured total electrical impedance and velocity-voltage transfer function data was developed. A commercially available, moving-magnet driver coupled to a functional the...

A field pile loading test was carried out on the Peshawar–Karachi Motorway (PKM) project in Pakistan to show settling mechanism of bored foundation pulverized soil and force characteristics frictional resistance at pile-soil interface. The changes lateral settlement during loading-unloading process piles were measured analyzed, as well load-settlement distribution different layers, internal for...