4828results about How to "Avoid instability" patented technology

A method for controlling footwear, comprising cushioning a transient force during use of the footwear at a first period of a gait cycle, storing energy from said cushioning, and releasing the stored energy during use of the footwear at a second period of the gait cycle, and after said transient force has subsided. The control can be electronic, mechanical or hydraulic, and is preferably dependent on a sensed gait cycle phase. The control may be adaptive to the user or the use of the footwear. The stored energy can be used to assist in locomotion, to generate electrical energy, to drive a heat pump, or simply dissipated.

The present disclosure relates to combining tunable antenna matching circuit adjustments and RF power amplifier output power adjustments of a first RF terminal in response to output power adjustment commands received from a second RF terminal. The output power adjustment commands may be part of an output power control loop between the first RF terminal and the second RF terminal to control the output power from the first RF terminal. The first RF terminal may include an RF receiver, an RF power amplifier, and a tunable antenna matching circuit coupled between an output of the RF power amplifier and an antenna. The tunable antenna matching circuit adjustments may be impedance adjustments of the tunable antenna matching circuit and the RF power amplifier output power adjustments may result from adjustments to one or more input signals to the RF power amplifier.

Systems and methods for restoring file system objects from image level backups of servers. The method receives a selection of an image level backup of a source, file system object(s) to be restored, and restoration parameters identifying a destination. The method initializes and attaches a virtual storage to a virtual appliance and an associated hypervisor. The method stores virtual storage data changes resulting from the file system object restoration in changes storage. The method preserves file system object information, wherein the file system object information corresponds to the source operating system (OS) and file system. The method preserves file system object information such as permissions and ownership through business logic that ensures that the file system object information for restored file system object(s) on the destination match file system object information from the source, even when the method operates on a host running a different OS than the source server.

Stabilization of a switching voltage regulator employing V² control against ripple oscillation instability when the equivalent series resistance (ESR) of an output capacitor is small is provided by providing both an external ramp and an internal ramp (only the latter of which requires an approximation of inductor current) in the control feedback path, preferably including both inner and outer feedback loops. Approximation of inductor current using such an arrangement is non-critical and may be estimated based on power input voltage. Drift of a circuit providing such an inductor current estimation is preferably avoided by adjusting control duty cycle or slew rate of the positive-going ramp portion of the estimated inductor current triangular waveform.

Methods and apparatuses for discriminating between user blowing and drawing (sucking) in an electronic vaporization device. Described herein are electronic aerosol devices and methods of controlling or operating them which can accurately differentiate between blowing and drawing (sucking) through the mouthpiece and adjust the control of the vaporizer accordingly.

The present invention provides an improved control methodology for maximum power point tracking (MPPT), anti-islanding, and output current regulation for distributed generation sources connected to a utility grid. The control includes enhancements for MPPT and regulating the inverter output-current that is sourced into the utility grid. In addition, the functions associated with MPPT, anti-islanding detection and output current regulation are integrated together; the MPPT algorithm operates in conjunction with the anti-islanding detection, and the output current regulation operates in conjunction with the MPPT algorithm.

A class AD audio amplifier system (10) with reduced noise capability in muting and unmuting events is disclosed. The amplifier system (10) includes multiple audio channels (20), each of which can be constructed to include a pulse-width-modulator (PWM) (24). The PWM modulator (24) includes a pair of comparators (39A, 39B; 52+, 52−) that generate complementary PWM output signals based upon the comparison between a filtered difference signal and a reference waveform. When the system is muted, a common mode voltage (CM_RAMP) is applied to the inputs of the comparators (39A, 39B; 52+ 52−) to suppress the duty cycle at the amplifier output, preferably to a zero duty cycle. In the transition from a muted state to an unmuted state, the common mode voltage (CM_RAMP) is ramped from the suppressing voltage to zero common mode voltage, permitting the duty cycle of the complementary PWM signals to gradually increase, thus reducing clicks and pops. The converse operation is performed in the transition from unmuted to muted. Pulse-width-modulation control logic (26) is also included to ensure that that the PWM “on” and “off” pulses are of at least a minimum duration, and also to generate compensating pulses on the complementary PWM line at low duty cycles.

A compound aircraft features variable incidence wings, a thruster, a rotor and a clutch connecting the engines to the rotor. Upon reaching a suitable forward speed, the control system of the compound aircraft unloads the rotor and disengages the clutch, disconnecting the rotor from the engines. The control system configures the cyclic and collective pitch effectors to cause the rotor to autorotate. The control system selects an autorotation rotational speed that is adequately rapid to prevent excessive deformation of the rotor blades due to aerodynamic forces acting on the blade and that is adequately slow to prevent excessive compressibility effects.

The present invention provides a batch testing system and method that applies a single shielded anechoic chamber to simultaneously test multiple wireless communication devices. The shielded anechoic chamber can avoid external electromagnetic interference, reduce strength of reflected signals significantly and provide stable channel environment, thereby testing signal transceiving of the wireless communication devices more precisely. The present invention also provides a design for the batch container and loading mechanism within the chamber.

A field effect transistor of the present invention includes, on a semiconductor substrate, (i) a fin section formed in a fin shape protruding from the substrate, (ii) a gate dielectric for covering a channel region section of the fin section, (iii) a gate electrode that is insulated from the channel region section by the gate dielectric and is formed on the channel region section and (iv) an insulating layer for covering a surface of the semiconductor substrate. The fin section is formed so as to extend from the semiconductor substrate through the insulating layer and protrudes outward from a surface of the insulating layer. In this way, the channel region of the fin section is physically in contact with the substrate.

A memory controlling method, a memory controller and a memory storage apparatus are provided. The method includes identifying whether a transmission mode between the memory storage apparatus and a host system belongs to a first transmission mode or a second transmission mode and grouping memory dies of the memory storage apparatus into a plurality of memory die groups. The method also includes applying a first erasing mode to erase data stored in the memory dies when the transmission mode belongs to the first transmission mode and applying a second erasing mode to erase the data stored in the memory dies when the transmission mode belongs to the second transmission mode, wherein at least a part of the memory die groups are enabled simultaneously in the first erasing mode and any two of the memory die groups are not enabled simultaneously in the second erasing mode.

The invention discloses a radar generated color semantic image system and method based on a conditional generative adversarial network, which belong to the technical fields of sensors and artificial intelligence. The system includes a data acquisition module based on radar point cloud and a camera, an original radar point cloud up-sampling module, a model training module based on a conditional generative adversarial network, and a model using module based on a conditional generative adversarial network. The method provided by the invention includes the following steps: constructing a radar point cloud-RGB image training set; constructing a conditional generative adversarial network based on a convolutional neural network to train a model; and finally, enabling the model to generate a colorroad scene image with meanings in real time in a vehicle environment by using sparse radar point cloud data and the trained conditional generative adversarial network only, and using the color road scene image in automatic driving and auxiliary driving analysis. The network efficiency is higher. The adjustment of network parameters can be speeded up, and an optimal result can be obtained. High accuracy and high stability are ensured.

It is an object of the present invention to provide a display device in which images can be seen under a dark place to intense external light. In the display device, display is performed by changing the gray scale number depending on external light intensity, and display modes can be switched depending on contents displayed on the screen. An analog mode and a digital mode are switched depending on external light intensity. In an analog digital switching circuit, when a video signal is an analog value, a signal is outputted to a pixel array without any change and, when the video signal is a digital value, the signal is outputted to a circuit that performs a digital operation such as a latch circuit. Consequently, display gray scales of a pixel are changed appropriately. Accordingly, a clear image can be displayed. For example, it is possible to ensure visibility in a wide range of a dark place or under indoor florescent light to outdoor sun light.

In a laser-diode-pumped laser apparatus, a solid-state laser crystal doped with at least one rare-earth element including at least Pr3+ is pumped with a laser diode, and emits laser light. In the first aspect, the laser diode has an active layer made of one of an InGaN, InGaNAs, and GaNAs materials, and an optical wavelength conversion element converts the solid-state laser light into ultraviolet laser light by wavelength conversion. In the second aspect, the solid-state laser crystal is codoped with Pr3+ and at least one of Er3+, Ho3+, Dy3+, Eu3+, Sm3+, Pm3+, and Nd3+. In the third aspect, instead of the solid-state laser crystal, an optical fiber codoped with Pr3+ and at least one of Er3+, Ho3+, Dy3+, Eu3+, Sm3+, Pm3+, and Nd3+ is pumped with a GaN-based compound laser diode. In the fourth aspect, an optical fiber codoped with Pr3+ and at least one of Er3+, Ho3+, Dy3+, Eu3+, Sm3, Pm3, and Nd3+ amplifies incident light having a wavelength which is identical with a wavelength of fluorescence generated by pumping of the optical fiber with a GaN-based compound laser diode.

The embodiment of the invention discloses a method and device for detecting an abnormal point in a time sequence. The method comprises the following steps: acquiring a discrete point in a business index time sequence; carrying out clustering prediction on a time subsequence comprising the discrete point, and determining a first prediction result of the discrete point; obtaining an error value from an index value of the discrete point through decomposition according to the time sequence decomposition method, and determining a second prediction result of the discrete point according to the error value; and determining an anomaly detection result of the discrete point according to the first prediction result and the second prediction result. The method and device adopting the technical scheme has the advantages that the abnormal point identification accuracy can be improved; and compared with the baseline detection mode in the prior art, the method and device achieves a much lower occurrence rate of abnormal point false alarms.

The invention discloses an indoor positioning system and method based on Bluetooth and MEMS (Micro-Electro-Mechanical Systems) fusion. A particle filter for Bluetooth/MEMS fusion positioning is designed, usable information of two subsystems is sufficiently utilized, wherein a Bluetooth system matches and acquires information of a user on line after off-line database building, and an MEMS combined system acquires position prediction information of the user through course angle calculation and dynamic step length estimation; an extended Kalman approximate particle filter is taken as a fusion navigation filter, user position information data of the two subsystems are fused, a state equation and an observation equation are constructed by reasonably selecting the state variable and the observational variable, finally, the optimal user position information is obtained, and indoor accurate positioning is realized. Through Bluetooth/MEMS indoor fusion positioning, the defects that a conventional indoor positioning system is low in positioning accuracy, the equipment cost is high, the coverage range is narrow, the positioning continuity is poor and the like can be overcome.

The invention relates to the field of biology, and discloses a serum-free culture medium which essentially comprises an IMDM (Iscove Modified Dulbecco Medium), L-glutamine, sodium bicarbonate, Hepes, recombinant human insulin, recombinant human transferrin, recombinant human albumin, 2-mercaptoethanol, protocatechuic acid, lipid, amino acid, vitamins, trace elements, Pluronic F-68, hydrocortisone, vitamin C, bonding amine or recombinant human fibronectin, progesterone, putrescine, heparin, serotonin, epidermal growth factors (EGFs), b-fibroblast growth factors (FGF), platelet derive growth factor (PDGF)-BB and insulin-like growth factor (IGF)-I. The serum-free culture medium is clear in chemical components, free from animal sources and serum and safe and ideal in cell cultivation and avoids the doped animal components and unstable batches, and the results of the cultured mesenchymal stem cells show that the total cellular score, the cell phenotype and the secretory cell factors are normal, so that the serum-free culture medium has good industrial application prospect.

A novel fiber optic sensor configuration whose diameter is the same as that of the optical fiber on which it is directly fabricated is introduced. A simple MEMS-compatible fabrication process to accomplish micromachining on the fiber end face has been developed and is detailed. This sensor configuration significantly reduces the size of the sensor and makes the packaging simple and adhesive free. The micromachining process of the present invention also provides for the fabrication of arrays of sensors that would provide two dimensional maps with high spatial resolution of at least one of acoustical vibration, mechanical vibration, pressure, temperature, acceleration, electrostatic fields, magnetic fields or combinations thereof.

The invention provides a method for preparing a continuous alumina-based ceramic fiber, which relates to an alumina-based ceramic fiber, in particular to a method for preparing a continuous alumina-based ceramic fiber which takes alumina as a main component and adds a second component as a crystalling phase inhibitor. The invention provides a method for preparing the continuous alumina-based ceramic fiber, which is simple in technique and low in cost. The method comprises the steps: preparing alumina sol; preparing silicon dioxide sol; mixing the alumina sol and the silicon dioxide sol to obtain biphase sol, and adding a spinning addition agent into the biphase sol; condensing the biphase sol added with the addition agent and spinning by a dry method to obtain the gel fiber; pyrolyzing the gel fiber to obtain the ceramic fiber; and sintering the ceramic fiber to obtain the continuous alumina-based ceramic fiber.