294results about How to "Eliminate fluctuations" patented technology

A transmission device for converting a torque from rotary to linear movement includes a rack having a plurality of teeth and a pinion having rollers which mesh with the teeth of the rack, with pressurization provided therebetween. The rack has an arcuate tooth flank diametrically greater than each of the rollers of the pinion. The rack also has a tooth face which has an approach profile progressively moving away from the path of contact of each of the rollers along which each of the rollers would otherwise engage with the tooth face. A plurality of each of the rollers of the pinion concurrently mesh with the corresponding teeth of the rack. Another embodiment converts a torque between rotary and linear movement and comprises a pinion having a plurality of teeth and a rack having a plurality of rollers to mesh with the teeth of the pinion. The device achieves reduced transmission resistance, a silent intermeshing movement with no substantial noise and vibration, as well as reduced wear on the teeth and rollers.

The invention provides a system and a method for optimally controlling ammonia denitration, which are characterized in that according to the content of oxynitride which is detected by an oxynitride sensor at the inlet of a reactor and fed into the reactor, the content of oxynitride which is detected by the oxynitride sensor at the outlet of the reactor and discharged from the reactor, and the continuous online measuring value of the oxynitride at the outlet of the reactor and the escaped ammonia amount detected by an ammonia sensor at the outlet of the reactor, the ammonia-injected amount is calculated according a transfer function; the control system has positive and negative feedback correction effects on feedforward loops, and monitors the continuous online measuring value of the oxynitride, thereby ensuring the implementation of meeting the qualified oxynitride discharge index; the control system is provided with two lag time functions so as to overcome the effect of time lag, eliminate the fluctuations of the oxynitride content and ammonia-injected amount at the outlet of the reactor; and meanwhile, the control system is also provided with an ammonia escape detection sensor for preventing the escape of ammonia.

Some embodiments allow a video editor to remove unwanted camera motion from a sequence of video images (e.g., video frames). Some embodiments are implemented in a video editing application. Some of these embodiments distinguish unwanted camera motion from the intended underlying motion of a camera (e.g., panning and zooming) and/or motion of objects within the video sequence.

This invention relates to compositions for the sustained release of biologically active polypeptides, and methods of forming and using said compositions, for the sustained release of biologically active polypeptides. The sustained release compositions of this invention comprise a biocompatible polymer having dispersed therein, a biologically active polypeptide and a sugar.

The invention relates to a permanent magnet synchronous motor (PMSM) AC servo system, which is composed of a DSP control panel, a rotary transformer, a main power circuit and a conditioning and protecting circuit, a motor body consists of an armature winding and a permanent magnet core rotor, wherein the motor is excited by a permanent magnet, and the DSP is used for realizing an field-orientated control algorithm, communication, sampling calculation of current and configuration output of a drive; the output of the rotary transformer enables data to be transmitted to the DSP via four-path DA transform chips and SPI of the DSP or multi-channel buffering; the DSP outputs pulse width modulation, is connected with voltage signals output by a current regulator, and is connected with a PWM1-PWM3 drive inverter which can convert the voltage signals into three-phase switch signals by CLARK inverse transformation, and the inverter outputs to the armature winding so as to control the armature winding of the motor to generate a rotary round magnetic field; and the main power circuit is composed of a direct current detection circuit with controllable rectification, an inverter, a current detection circuit, an overvoltage discharging circuit, a protection circuit and a driving circuit. The invention adopts the field-orientated control algorithm which can control the torque, speed and position state of the motor in real time and has good control performance.

An average face-image is created from images belonging to a face-image group and sample points are specified on the average face-image. Sample points are detected on images in the face-image group corresponding to sample points on the average face-image thereby creating recognition subspaces of feature vectors. Sample points are detected on registered images and an input image corresponding to the sample points on the average face-image by using the recognition subspaces. A degree of similarity between the feature vectors in the recognition subspaces of the registered images and the input image is calculated at the detected sample points. Finally, a person is verified based on the degree of similarity.

The invention provides an inhibiting method and system for battery electric vehicle shaking. According to the method, the current needed torque of a driving motor is obtained firstly; then whether the needed torque needs compensation or not is judged; if the needed torque needs to be compensated, a torque compensation step is conducted; if not, the driving motor is controlled to operate according to the needed torque; and the torque compensation step comprises the content that the compensation torque is obtained through a preset algorithm according to the current motor rotating speed of the driving motor, the compensation torque is used to compensate the needed torque, the output torque is obtained, and the driving motor is controlled to operate according to the output torque. The output torque of the driving motor is obtained through compensation of the compensation torque obtained according to the current motor rotating speed, so that fluctuation of the rotating speed of the driving motor can be eliminated, shaking of the electric vehicle is inhibited, and comfort of a driver in driving is improved.

A display apparatus for driving light emitting elements to emit light at a timing shifted according to the order of scanning lines, is arranged to control the light emission intensity of the light emitting element in accordance with an image signal and include a drive unit for driving the light emitting elements of the respective scanning lines in a light emission pattern including a first impulse operation period light emission pattern and a second impulse operation period light emission pattern.

A cyber-foraging network system which automatically and intelligently detects, selects, and connects to a wireless networking access point utilizing data obtained from its own environmental observations as well as from a robust wireless networking context aggregation/interpolation service.

A liquid supplying apparatus includes: a first flow channel configured to be switchable between a state of communication with a liquid supply object and a state of noncommunication with the liquid supply object; a first pressure applying device which applies pressure to liquid in the first flow channel; a first pressure absorbing device which absorbs a pressure fluctuation of the liquid in the first flow channel; a first measuring device which measures a pressure increase value in the first flow channel when the first pressure applying device is operated under a standard operating condition in which pressure in the first flow channel varies relatively moderately in proportion to a liquid feed amount to the first flow channel in the state of noncommunication where the liquid supply object and the first flow channel are not communicated with each other; a comparing device which compares the pressure increase value measured by the first measuring device with a predetermined pressure increase target value; and a pressure controlling device which controls the first pressure applying device according to a comparison result of the comparing device so as to correct the pressure applied into the first flow channel.

A capacitive sensor in its simplest form has three identical plated spatial electrodes, which are positioned equally spaced apart, in order, alignment and parallel with each other. The first and third electrodes are the outer electrodes and connected in parallel by a first lead wire serving as a first electrical pole to be a group of the integrated electrodes. The second electrode is the middle electrode and connected by a second lead wire serving as a second electrical pole. The sensor is applied by an alternating current (AC) excitation by an AC device. The present invention method includes application of referencing and sensing capacitive sensors to obtain a measured temperature compensated electrical property of the oil to thereby obtain a measured remaining usage so as to a predicted one for the oil. Therefore, the respective top oil level, or the normal or the abnormal oil deterioration can be concluded according to the measured remaining usage which is respectively larger than, or similar to, or less than the predicted one for the oil.

The invention discloses a parallel-connection active power filter suitable for a three-phase four-wire power grid system, which mainly comprises a three-phase full-bridge inverter circuit, a half-bridge chopper circuit and two capacitors; the three-phase full-bridge inverter circuit is electrically connected with the three-phase four-wire power grid system and connected in parallel with the half-bridge chopper circuit; and the other side of the half-bridge chopper circuit is electrically connected with a midpoint of the two capacitors at a direct-current side through an inductance, and the half-bridge chopper circuit is used for controlling the direct-circuit side voltage of the parallel-connection active power filter. A double close-loop control mode is adopted in the invention, wherein the inner ring is a voltage ring which is used for providing energy feedforward for controlling the direct-current end voltage stabilization and restraining zero-sequence current perturbance; and the outer ring is a current ring which is used for controlling the output current of the parallel-connection active power filter. Compared with the prior art, the parallel-connection active power filter with the double close-loop control structure can be used for preferably compensating the power grid harmonic current and restraining three-phase imbalance.

Methods for detecting oil conditions including a top oil level in an oil system which is reduced to a top level of a threshold amount of the oil, a normal oil deterioration which occurs in the absence of water having a confirmed remaining oil usage, and an abnormal oil deterioration which occurs in the presence of water. The methods comprise a first preferred embodiment which applies a reference and sensing capacitors to obtain a measured temperature compensated electrical property of an oil in use. From which a quantitatively measured remaining usage is obtained so as to a predicted one for the oil. Therefore, the respective top oil level, or the normal or the abnormal oil deterioration can be concluded according to the measured remaining usage which is respectively larger than, or similar to, or less than the predicted one for the oil. A second preferred embodiment only includes the sensing capacitor for obtaining the measured property of the oil. Variations to the embodiments lead to employment of at least two sensing capacitors to monitor an uneven distribution of the oil deterioration or a full range of the oil level of the entire oil system.

A stall prediction apparatus of an axial compressor provided with: a rotor provided with a plurality of rotor blades; and a cylindrical casing facing the rotor blades and provided so as to cover the outer circumference of the rotor, comprising: pressure sensors provided in equal numbers at a plurality of locations in a circumferential direction of an inner wall surface of the casing, an index calculator for calculating an index (stall risk index) for evaluating the stall risk based on time-series data detected by each of the pressure sensors, and a signal processor for predicting the stall occurrence based on the stall risk indexes obtained corresponding to said each of the pressure sensors. In accordance with the present invention, it is possible to obtain a stall risk index which is highly accurate (supersensitive) and stable necessary for the active stall control, and to realize an engine control system with high reliability.

The invention discloses an aneuploidy biological information analysis method and system, wherein the method comprises: 1) constructing a reference database; 2) calculating UR ratio; 3) constructing statistical parameters of the reference database; 4) calculating Z value; 5) decreasing fetal chromosomal aneuploidy false positives due to microdeletion or micro-duplication present in maternal chromosomes according to the above process of decreasing fetal chromosomal aneuploidy false positives due to microdeletion or micro-duplication present in maternal chromosomes; 6) constructing a fetal DNA concentration prediction model to predict fetal DNA concentration according to the above process of constructing a fetal DNA concentration prediction model; 7) calculating percentage of DNA of each fetal chromosome to total DNA; 8) judging autosomal aneuploidy; 9) judging allosomal anomalies. By using the method and system according to the technical scheme, analytical accuracy is improved greatly.

A probe card on which micro probe needles are arranged at high density and with high precision with neither the need of a complicated structure or variation in needle height. A probe card 1 installed in a wafer tester comprises a board 2 having a wiring pattern for transmitting a test signal to be impressed on a wafer under test, a built-up board 10 formed on the surface of the board 2, a comb-shaped silicon-made probe needle 20 arranged on the built-up board 10 and connected to the surface wiring pattern 11, and a flat portion 12 formed by plating on the surface wiring pattern 11 on the built-up board 10 and having a surface flattened by polishing. The probe needle 20 is loaded on the flat portion 12 and thus mounted on the board 2.

Methods of forming compositions for the sustained release of water soluble active agents, including biologically active polypeptides and products produced by the process are described. Improved product characteristics and ease of scale-up can be achieved using a novel coacervation process wherein at least one coacervation agent is added to the mixture comprising the active agent and the polymer in at least two distinct stages.