摘要:
A method for discovering demagnetisation faults of a permanent magnet synchronous generator, such as a wind power generator. The method is performed during operation of the synchronous generator and includes measuring the vibration of the stator, performing a frequency analysis of the vibration, and deducing whether the generator suffers from demagnetization of a permanent magnet, from the vibration analysis. Moreover, geometric eccentricity faults and electric short circuit faults may also be detected from the vibration.
摘要:
The present invention relates to a grid monitoring system, in particular a grid monitoring system enabling real-time monitoring of grid variables, e.g. voltage and current, in electrical power systems, such as single or three-phase networks. The grid monitoring system comprises a harmonic detection unit being adapted to subtract harmonics of an input signal before feeding the input signal to a plurality of signal generators in the harmonic detection unit.
摘要:
The invention provides novel healthy kidney biomarkers useful in the monitoring of renal function and in the prognosis and diagnosis of renal dysfunctions, especially those related to graft rejection. The invention further relates to methods for aiding in the evaluation, and design of personalized therapies in transplantation nephrology.
摘要:
Methods and mechanisms to simultaneously regulate two or more supply voltages provided to an integrated circuit by a voltage regulator. In an embodiment of the invention, a voltage regulation message exchanged between the integrated circuit and the voltage regulator includes an identifier indicating two or more supply voltages selected from a plurality of supply voltages provided to the integrated circuit by the voltage regulator, where the voltage regulation message relates to the indicated two or more supply voltages. In another embodiment, the voltage regulation message indicates a desired supply voltage level to which the indicated two or more supply voltages are to transition.
摘要:
This invention deals with an advanced Real-time Grid Monitoring System (RTGMS) suitable for both single-phase and three-phase electric power systems. This invention provides an essential signal processing block to be used as a part of complex systems either focused on supervising and diagnosing power systems or devoted to control power processors interacting with the grid. This invention is based on a new algorithm very suitable for real-time characterization of the grid variables under distorted and unbalanced grid conditions. The main characteristic of this invention is the usage of a frequency-locked loop, based on detecting the grid frequency, for synchronizing to the grid variables. It results in a very robust system response in relation to existing technique based on the phase-angle detection since grid frequency is much more stable variable than the grid voltage/current phase-angle, mainly during grid faults. Moreover, the algorithm supporting this invention is very efficient and can be implemented in regular industrial microprocessors. These features make the RTGMS object of this invention ideal to be applied in the control of distributed generation systems (DGS), flexible AC transmission systems (FACTS), power quality conditioners (PQC) and uninterruptible power supplies (UPS). In all these systems, the fast and precise real time detection of the voltage and/or current sequence components under grid fault conditions is a crucial matter.
摘要:
A method and a device for detection, classification and densimetric quantification of grain-eating insects, of one or several families of insects simultaneously present, in stocks of cereals and the like, which includes detecting insects through noises and sound and/or infrasonic vibrations emitted by the insects. It also includes carrying out the following operations: recording the real noises in the stock, eliminating known spurious noises, detecting on the resulting envelope energy curve windows corresponding to energy peaks and determining therefrom the mean frequency, the spectral width and the global energy, comparing the mean frequency and the width of each of the windows to that of windows with similar known and listed characteristics, so as to operate a taxonomic classification, finally, comparing the mean frequency and the global energy of each of the windows, to those of windows with known and listed characteristics, to operate a densimetric quanitification.
摘要:
Flavoured/aromatized ice cubes, a method for their production and the use of the ice cubes produced. The cubes are characterized in that each cube comprises an ice cube mass formed by frozen water with flavouring (and optionally colouring) agents in variable proportions of substantially between 0.01% and 20% by weight of the mass of water to be frozen, for the compensation of the flavour (and optionally the colour) of a drink cooled by the introduction of the ice cubes in a manner such that the flavouring (and optionally colouring) agents are dissolved in the mass of the ice cubes or are incorporated in the cubes in the form of discrete bodies soluble in the liquid to be cooled.
摘要:
A capacitor (FIGS. 6-9) includes one or more extended surface lands (604, 704, 804, 904, FIGS. 6-9). In one embodiment, each extended surface land is a land on a top or bottom surface of the capacitor, having a land length that is equal to at least 30% of the width (614, FIG. 6) of the capacitor or 20% of the length (914, FIG. 9) of the capacitor. When embedded within an integrated circuit package (1102, FIG. 11), two or more vias (1112) can be electrically connected to the extended surface lands (1108).
摘要:
A high density cell stack is provided utilizing strips of flexible cathode material and flexible anode materials folded over each other at right angles. A suitable anode material is lithium and a suitable cathode material is manganese dioxide. The disclosed cell stacks are rapidly manufactured to provide high density cells with good mechanical stability and good stability against shorting.