Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
Recently, Mars exploring draws more and more attention due to the successful landing of Mars Rovers. It was over 64 months for the Spirit Rover working on Mars. Also, since January 25, 2004, the Opportunity Rover works over 10 years on Mars. These two Rovers work much longer than their design period of 3 months. Furthermore, another NASA Mars Rover, the Curiosity Rover, works very actively on Mars...
During geomagnetic storms, the geoelectric field drives currents in transmission grids, railway system and pipelines. These geomagnetically induced currents (GIC) threaten the safe operation of equipment. The GIC recordings show that geological structure has significant implications for GIC in power gird (Liu Chunming et al. 2009). In the region with complex geological structure, the horizontal change...
Multiferroic materials have been attracted for considerable research interest because of rich physical properties and broad application prospects. Ordered double perovskite transition metal oxide superlattices are exciting materials with promising multiferroic properties near room-temperature. However, there was not a widespread solution to the central problem of the microcosmic mechanism about ferroelectric...
The resistive switching (RS) phenomenon refers to the reproducible switching between a high resistance state (HRS) and a low resistance state (LRS) observed in a metal/oxide/metal (MOM) configuration [1]. The RS effects in binary oxide materials such as NiO, TiO2, and TaOx has been studied intensively for their potential applications in nonvolatile resistive random access memory (RRAM) due to their...
With the great concerns on alleviating the pollution on the environment and traffic congestions; there is a trend for developing the electric vehicles [1], [2]. For such drive system, the in-wheel machines draw the main attention due to its relative higher torque density and compact structure [1]. With the permanent magnet (PM) located on the stator teeth, the flux switching permanent magnet machine...
Magnetic refrigeration based on themagnetocaloric effect (MCE) is a promising alternative to the conventional gas compression refrigeration, owing to its higher cooling efficiency, environmental friendliness, and compactness. The majority of research in this field is to seek materials that exhibit large MCE over a wide temperature range, with manufacturing flexibility, and are cost-effective. Among...
To meet the ever stringent operational efficiency requirements, effective reduction of the copper losses is one of the viable approaches for small-power induction motors. From the corresponding International Electrotechnical Commission (IEC) standards, though the line-start permanent magnet (PM) motors can supply relatively larger torques with higher efficiencies in the super- (IE4) or even ultra-premium...
Ferrites have attracted great research interest with their electronic and magnetic properties. Ferrite materials have been prepared with many synthesis methods such as co-precipitation, sol-gel, Pechini method, spray drying, aerosol spray pytolysis, cryochemical and precipitation synthesis, etc. The advantage of the hydrothermal method is that the mild conditions could be more energy efficient as...
Ropeless elevators have developed very quickly in recent years. There are two main drawbacks of the conventional elevators with rope, especially when they are used in skyscrapers of 250–400m high [1]. One problem is that the space occupancy of the total floor space would be more than 30% in buildings over 250m high [2]. Another drawback is that controlling the elevator in tall buildings is difficult...
Since intermediate mechanical conversion mechanisms for speed, torque and motion conversion can be entirely eliminated, the direct-drive wave power generation attracts more and more attention [1]. Among various proposed generators, the permanent-magnet (PM) vernier generator is considered as a viable solution for the wave energy harvesting. This generator can efficiently harness this low-speed and...
Mechanical gearbox, which plays significant roles in vehicular transmission system, inherently suffers from the drawbacks of wear-and-tear and regular maintenance [1]. Magnetic gears are considered as the preferred gearing device for vehicular transmission system because they have the merits of silent operation, maintenance free and physical isolation. However, the gear ratio of magnetic gear is fixed...
In this paper, a new hybrid-excited flux switching (HEFS) machine with outer-rotor is proposed, which possesses distinct feature of high fault-tolerant operation. Comparing with the conventional permanent-magnet (PM) machine, it combines the merits of flux switching, low-cost, and high mechanical integrity [1]. Furthermore, its fault-tolerant feature ensures its continuous operation in the event of...
This is an experimental study on effectively decomposing volatile organic waste by atmospheric-pressure microwave plasma. P-Xylene (PX) was used as a sample agent in the experiment because it is the main volatile organic compound (VOC) exhaust waste produced in many chemical industries and difficult to eliminate completely. We developed a microwave plasma apparatus1 which was designed for research...
A strong positive correlation between dynamic Ron and the ionization of buffer traps by injection of electrons from the Si substrate is presented. By exploring different Carbon doping profiles in the epi layers, the substrate buffer leakage is substantially reduced, which in turns results in lower dynamic Ron. The traps in the epi structure are characterized by different electrical techniques such...
This paper aims at comparing the performances of induction and synchronous reluctance machines considering the driving cycle. The analytical models of the two machines are proposed and validated. The geometries and the electrical controls of these machines are used to define the total energy losses during the driving cycle. The methodology of the global optimization is also presented in this paper.
Oversampled filter banks (OSFBs) have recently been considered for channel coding since their redundancy introduced into the transmitted signal permits more freedom in the design of joint transmitter and receiver. Further specifically, they can be exploited to transmit over low noise subspaces or even mitigate disper-siveness of the channel. In this paper we propose a joint precoding and equalisation...
A five-channel frequency-division multiplexing (FDM) fiber laser sensor array based on multilongitudinal mode fiber lasers (MLMFLs) and beat frequency demodulation was proposed. Detailed theoretical analysis of the FDM principle was also described. The potential application of the MLMFL-based FDM for strain measurement was further experimentally studied. The strain sensitivity of $-$0.92 kHz/ $\mu\varepsilon$...
An atomistic Monte-Carlo simulator is developed for TaOx-based resistive switching random access memory (RRAM) including both the generation & recombination effect of oxygen vacancy defects with oxygen ions and the phase change effect between Ta2O5 and TaO2. Using the developed simulation tool, the resistive switching characteristics of the bi-layered Ta2O5/TaOx RRAM are investigated. The typical...
On-chip devices for point-of-care diagnostics are excellent options for rapid and low-cost testing. However, there are not many fully integrated on-chip nucleic-acid tests reported in literature. Here, we propose a palm-sized ‘chip’ in which solid-phase extraction, isothermal enzymatic amplification (LAMP) and real-time fluorescence detection are integrated. The device operates with one moving part;...
We successfully developed and verified a complete compact model solution for layout dependent effect (LDE) of FinFET technology. LDE has significant impact on the device performances mainly due to the application of stressors and aggressive device scaling. With LDE, performance degradation may be up to 10% or more. In this work, compact model solution for Length of Oxidation (LOD), Well Proximity...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.