42results about How to "High variation" patented technology

A bipolar electrogram and a unipolar electrogram are recorded from electrodes of a probe, and differentiated with respect to time. Peaks are identified in the differentiated bipolar electrogram. An activity window is defined that includes bipolar activity about the peaks. An extreme negative value in the differentiated unipolar electrogram within the activity window is reported as a unipolar activation onset. In one aspect, an annotation is selected from candidate minima in the differentiated unipolar electrogram within the activity window by excluding candidates that fail to correlate with activity in the bipolar electrogram.

Methodology for characterizing non-uniformity forces at a tire spindle, such as low and high speed radial force variations and high speed tangential force variations include the steps of measuring radial run out and radial or tangential force variations at high and/or low speeds. From such measurements, the contribution of a predetermined type of stiffness variation (e.g. radial, tangential, extensional, bending) to respective radial and/or tangential force variations can be determined. Signature analysis statistical methods may also be utilized to characterize such tire non-uniform forces for different steps and reference physical angles of a tire construction process. Based on the characterization of such tire non-uniform forces, additional process steps may further correspond to tire grading and/or sorting processes, physical tire modification processes and tire manufacturing processes. Tire correction mechanisms and/or feedback control in a tire manufacturing process preferably yield tires having radial run out and stiffness variation parameters that are out of phase for one or more harmonics, thus yielding a reduction in the non-uniformity forces such as radial and tangential force variations at a tire spindle.

A character reading technique recognizes character strings in grayscale images where characters within such strings have poor contrast, are variable in position or rotation with respect to other characters in the string, or where portions of characters in the string are partially obscured. The method improves classification accuracy by improving the robustness of the underlying correlation operation. Characters are divided into regions before performing correlations. Based upon the relative individual region results, region results are combined into a whole character result. Using the characters that are read, a running checksum is computed and, based upon the checksum result, characters are replaced to produce a valid result.

An electronic device has an opening in a case, a lid member that includes a first lid member having a pair of first engaging sections for putting a lid on the opening at its both ends, a second lid member that has a pair of second engaging sections engaging with the first engaging sections and slides on a main surface of the first lid member, and a projection disposed at an end of the sliding direction of the second lid member. The case has an engaging hole engaging with the projection disposed on the second lid member.

Methods and apparatus for synchronizing a first clock of a transmit node and a second clock of receive node in a packet network are provided. Consecutive intervals of time-stamped packets transferred from the transmit node to the receive node are selected. The consecutive intervals have a difference in delay noise within a defined acceptance window. A correction factor is determined for the second clock in accordance with transmit and receive time stamps of transferred time-stamped packets bounding the consecutive intervals. The correction factor is applied to the second clock to synchronize the second clock of the receive node with the first clock of the transmit node.

This invention relates to a method and a system (10) for controlling a wind power plant (20) comprising at least one wind turbine generator (21a-n), the wind power plant being connected to a power network (30) for delivering power to the power network. The method comprises: detecting (201) a frequency of the power network; calculating (202) a variation rate in the detected frequency of the power network; calculating (203) a requested variation of delivered power for the wind power plant based on a value of the inertia of the wind power plant and the calculated frequency variation rate; calculating (204) a requested variation of delivered power for each wind turbine generator of the wind power plant based on the calculated requested variation of delivered power for the wind power plant and a current power level of each wind turbine generator. The resulting calculated re-quested power variation is then used for controlling (205) each wind turbine generator to deliver power to the network.

A measurement unit comprising a light source and a photodetector may be formed in a cavity in a substrate. The light source produces light that impinges a material layer and is reflected back to the photodetector. Through methods such as interferometry and ellipsometry, the thickness of the material layer may be calculated from the light intensity data measured by the photodetector. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

The present techniques include methods and systems for operating converter to maintain a lifespan of the converter. In some embodiments, the operating frequency of the converter may be increased such that stress may be reduced on the bond wires of the converter. More specifically, embodiments involve calculating the aging parameters for certain operating conditions of the converter operating in a maximum power point tracking (MPPT) mode and determining whether the MPPT operation results in aging the converter to a point which reduces the converter lifespan below a desired lifespan. If the MPPT operation reduces the converter lifespan below the desired lifespan, the frequency of the converter may be increased such that the converter may be controlled to operate at a percentage of MPPT. Thus, in some embodiments, power output may be optimized with respect to maintaining a desired lifespan of the converter.

A PON transmission system and a dynamic band assignment system to be employed in the same which permits high speed band variation, to effectively use up band in PDS period, and to adapt to variation of traffic type. The PON transmission system includes a plurality of subscriber unit including optical network unit processing portions for terminating an optical communication network and a station unit including optical line terminal processing portion terminating the optical communication network. The system also includes means for monitoring increasing and decreasing of idle cells, means for recognizing accumulation of cell in the optical network unit processing portion depending upon the result of monitoring, and means for individually handling band process in the optical communication network according to necessary or unnecessary of band restriction depending upon traffic type.

According to the present invention a received Direct Sequence Code Division Multi-Access (DS-CDMA) signal is differentially decoded at the chip level. A number of signaling schemes can be used in the invention including (1) an ON/OFF signaling scheme in which a pseudo noise number (PN) code is sent only in response to one data bit value, and no signal is sent in response to the other bit value; (2) a Two Code signaling scheme in which bit values of 1 triggers a first PN code to transmitted, and a bit value of 0 triggers a second PN code to be transmitted; and (3) an M-ary signaling method in which a plurality of data bit patterns respectively, trigger a plurality of PN codes to be transmitted. After differential decoding the received signal is despread using one or more PN codes, that can be vector sums of two or more PN codes.

The invention discloses a manufacturing method of slider. The slider comprises an incline portion (6) connecting a read/write portion (24) disposed with a convex configuration on an air bearing surface opposite to a recording medium, and a concave portion (26) adjacent to an end thereof where airflow flows in. The incline portion (6) includes a first incline portion (61) with a substantially linear shape connected with a surface of the read/write portion (24) and a second incline portion (62) with substantially linear shape connected with the concave portion (26). A first incline angle θ1 of the concave portion (26) with respect to the first incline portion (61) is larger than a second incline angle θ 2 of the concave portion (26) with respect to the second incline portion (62).

For acquiring data of dynamic physical processes via a radio link, a transponder antenna (17) is excited by an electromagnetic exciting wave at the resonance frequency of the transponder antenna (17), and a back-scattered electromagnetic sensor wave which is modulated by a sensor (16) having an electrical impedance depending on the data to be acquired is received and analyzed. The sensor (16) is directly connected to the transponder antenna (17) such that the sensor changes the electrical impedance of the transponder antenna (17) with every variation of the data to be acquired. The electromagnetic wave which is back-scattered by the transponder antenna (17) is received as the sensor wave at the same time as the transponder antenna (17) is excited by the exciting wave.

A method for feeding electrical power, by a one wind power installation, a power plant or a generation plant, into an electrical supply grid is provided. The grid has a grid voltage having a grid frequency at a grid connection point. In the method a reference system having a reference frequency, a reference phasor having a reference angle, and a reference amplitude of an output voltage are specified. The reference angle revolves at the reference frequency and the reference frequency substantially corresponds to the grid frequency. A phase angle between the output voltage and the grid voltage is specified and an infeed angle is determined. The output voltage is generated having a voltage amplitude depending on the reference amplitude, a frequency depending on the reference frequency and the infeed angle. Tracking of the behavior of the grid voltage is delayed by the reference system.

The present invention concerns a method of modifying the surface of a cellulosic material, wherein a modifying compound is attached to the cellulosic material through a linker, which linker is a conjugate that has been activated by functionalization prior to adsorption to form an activated conjugate, and wherein the entire method is carried out in aqueous media, as well as an intermediate product suitable for attaching to a modifying compound, the intermediate product comprising said functionalized conjugate linker that has been adsorbed to a cellulosic material.

The invention relates to a method for forming a steel container having a curled open end, comprising the steps of i) providing a steel cup; ii) deep drawing the steel cup into a drawn container preform; iii) thin drawing the body of the drawn container preform; and iv) curling an open end of the drawn container preform by forming a precurl and by curling the precurl into an elongated curl, to an apparatus for forming a steel container, and to such steel container and its preform.

An apparatus generates virtually pure hydrogen for fuel cells, and includes a device for reforming starting substances having at least one hydrocarbon-containing compound and water. Furthermore, the apparatus has catalytic agents for producing a water gas shift reaction in the reformate gas stream generated by the reforming device. Moreover, the apparatus includes a device for separating hydrogen out of the reformate gas stream using membranes which are selectively permeable to hydrogen. The hydrogen-separating device includes a proportion of the catalytic agents for producing the water gas shift reaction. A device for exchanging thermal energy between the reformate gas stream and a further stream of medium is arranged downstream, as seen in the direction of flow, of the reforming device. The device for exchanging thermal energy includes a further proportion of the catalytic agents for producing the water gas shift reaction.

To obtain a mask blank capable of suppressing build-ups after removing a resist film on a peripheral edge of a substrate and free of resist residues, even if using any kind of resist. In an unnecessary film removing step of a mask blank manufacturing steps, for removing the unnecessary resist film from a substrate 10 formed with a resist film 13 on a prescribed light-shielding film 12, the surface of the substrate on the side formed with the resist film 13 is covered with a cover member 30. First, while the substrate 10 is rotated with a prescribed rotation speed R1, the unnecessary resist film is dissolved by a chemical liquid 50. Next, while the substrate 10 is rotated with a prescribed rotation speed R2, the dissolved unnecessary resist film is removed. Further, while the substrate 10 is rotated with a prescribed rotation speed R3, the area from which the resist is removed is dried. In such a case, R1, R2, and R3 are expressed by (I) R1=100 to 500 rpm, (II) R2≧300 rpm, (III) R1<R2≦R3.