73results about How to "Remove asymmetry" patented technology

A system for enhancing the performance of a carrier insertion sensorless (CIS) position sensing system for a wound field synchronous machine that utilises the positively rotating components (+2ω_ct) of the carrier second harmonic currents that contain rotor position information before field excitation to serve as a north-south pole indicator that determines if the CIS system has locked onto the north or south pole of the rotor.

The aircraft is capable of two distinct fuel-efficient flight regimes: one is a vertical flight regime supported by two large two-bladed rotors with low disc loading located on right and left longitudinal booms. The booms extend between outboard regions of a front wing and inboard regions of a rear wing that has a larger span an area. The other flight regime is high speed up to high subsonic Mach number with the aircraft supported by wing lift with high wing loading, and with the rotors stopped and faired with minimal local drag contiguous to the booms. The longitudinal location of the aircrafts center of gravity, aerodynamic center and the center of the rotors are in close proximity. The front wing is preferably swept back, and the rear wing is preferably of W planform.

The invention discloses a method and a device for synchronizing clocks. The method comprises the following steps of: calculating frequency drift and time migration between a local clock and a master clock; calibrating the local clock by using the frequency drift, and calibrating second pulse signals by using the time migration; and synchronizing the time of work clocks and time stamp modules in physical layer chips by using TOD (time of date) of the calibrated local clock, the calibrated second pulse signals and the rising edge of the calibrated second pulse signals. According to the method and the device, the problem of low synchronization accuracy caused by nondeterminacy of network link delay introduced by the physical layer chips and asymmetry of duplex paths in the prior art is solved, and the time of a plurality of physical layer chips and the master clock is synchronized.

An inboard thrust surface is provided for a spindle motor that maintains fluid flow through a journal bearing and generates an added offset pressure to avoid any subambient pressure within a journal. In an aspect, journal bearing asymmetry is minimized or eliminated and axial span is increased between journal bearings, reducing wobble or run-out between relatively rotating components. In another aspect, journal axial length is decreased for low profile disc drive memory systems and other spindle motors. In an aspect, two separate thrust surfaces provide an axial force in the same direction, opposing an axial bias force created by interaction of a stator and a magnet, and minimizing power consumption.

An auto focus image system that includes a pixel array coupled to a focus signal generator. The pixel array captures an image that has at least one edge with a width. The focus signal generator may generate a focus signal that is a function of the edge width and/or statistics of edge widths. A processor receives the focus signal and/or the statistics of edge widths and adjust a focus position of a focus lens. The edge width can be determined by various techniques including the use of gradients. A histogram of edge widths may be used to determine whether a particular image is focused or unfocused. A histogram with a large population of thin edge widths is indicative of a focused image. Edge corruption/partial corruption may be detected. Partially corrupted edge may have edge width calculated by relying more on the side that is not corrupted and less on the side that is corrupted. Edge or edge side corruption may be detected by detecting a presence of an adjacent edge of the opposite sign.

The invention discloses a least square method-based extended Kalman filter rotating speed estimation method of an asynchronous motor. The method is specifically implemented according to the following steps of (1) solving a fading factor by use of a least square method, obtaining an optimized fading factor determining algorithm, adaptively adjusting an estimation error in real time and quickly tracking a state change; (2) introducing the fading factor into a state prediction covariance matrix of a traditional extended Kalman filter, building a strong tracking extended kalman filter, adjusting a gain matrix online in real time and compelling output residual sequences to be kept mutually orthogonal; and (3) building the least square method-based strong tracking extended kalman filter digitization system under an alpha-beta shaft system of an induction motor and carrying out rotating speed estimation. By the rotating speed estimation method disclosed by the invention, the adaptability of a system model on an actual system and an external environment change is improved; the steady accuracy and the gross error resistance of the system are improved and the system is faster in convergence in a disturbance.

The invention provides an engineering project element management method and system based on the BIM. The method includes the steps of storing attribute data A of a first BIM model in a server; simplifying the first BIM model to obtain and issue a second BIM model, wherein the association with the attribute data A in the server and the matching with the first BIM model in a PC terminal are achieved through the component ID; loading the second BIM model in a mobile terminal A, establishing the association relation between collected engineering project element information and the component ID, and achieving sharing through the server. By means of the association between the two BIM models and the component ID, data interaction and visual interaction are achieved.

The invention provides a titanium-steel dissimilar metal structure and a manufacturing method thereof. The meshing-corresponding sawtooth structure with high integrating degree is obtained by a stacking-and-lapping mode; a composite plate is obtained by meshing-connection; and high-quality welding of titanium-steel dissimilar metal is achieved by a stirring-friction welding method. The influence on the performance of a dissimilar metal stirring-friction welding connector by deviation is not necessarily to be considered; and asymmetry of a forward side and a backward side in the traditional butt joint process is eliminated. The sawtooth meshing structure is adopted, and therefore action of welding force on materials during the welding process is improved to assist material smashing, the linear contact area of the dissimilar metal is increased, relative movement distance of metal atoms is shortened so that more atoms can move under the same energy, the mutual flow and mutual mixing capacity of the dissimilar metal materials can be improved, the problem of nonuniform connector tissue mixing is avoided, interlocking mixing of weld joint materials is improved, and strength of the connector is greatly improved.

The invention discloses an electronic commerce system which solves the issues of win-win situation and integrity in online trading of digital products and mass trading of digital products. The electronic commerce system comprises a commodity management module, a batch bargain control module, a batch trading module, a feedback advice processing module, a credit management module, a feedback ending control module, a feedback advice examining and verifying module, a digital product management module, a digital product upgrading report module, a booking control module and a discounting control module. Consumers are attracted by batch trading within batch bargain time, on one time, the situation of buyer and seller information asymmetry prevalent on existing electronic commerce market is broken to further restrain merchant integrity, and on the other hand, digital product providers can obtain expected total revenue theoretically on the premise of limited open content, and the digital products can be traded credibly and massively like physical products via the internet.

The invention relates to a braking device of a wind power generation yaw bearing; a yaw rotary bearing consists of an outer bearing ring and an inner bearing ring; the inner side surface of the lower part of the outer bearing ring is provided with an annular concave bearing braking surface; the lower end surface of the inner bearing ring is provided with more than one fan-shaped brake; two end surfaces of a fan-shaped brake surface part of a brake support are contacted and connected with the left contacting surface and/or the right contacting surface of a brake fan-shaped groove; and a brake lining pad is provided with a fan-shaped convex lining pad braking surface matched with the bearing brake surface. When in braking, damping moment force generates when the lining pad brake surface of the brake lining pad is contacted with the bearing brake surface, and the tangential force generated in the braking process acts on the left contact surface and/or the right contact surface where the brake support is connected with a brake base, so that braking abrasion of the brake lining pad is reduced. In the invention, a plurality of fan-shaped brakes arranged symmetrically are adopted for applying damping moment force on the bearing brake surface so that yaw braking of a wind power generation set can be realized.

A microwave phase modulation locking atomic clock comprises a controlled crystal oscillator, a frequency doubling synthesizer, a modulation oscillator, a timing sequence generator, a quantum system, a data acquisition processor and a proportion integration difference controller, and is characterized in that the modulation oscillator is a microwave phase modulation oscillator. The microwave frequency of the atomic clock is not changed, so that the transition signal to noise ratio of the atomic clock is improved, and then the frequency stability of the atomic clock is improved.

The embodiment of the invention provides a credit evaluation device and a credit evaluation system, and the device comprises an obtaining module which is used for obtaining the evaluation data of an enterprise according to the loan request of the enterprise; a judgment and evaluation module, used for judging whether the enterprise meets an admission condition of participating in credit evaluationor not according to the evaluation data of the enterprise; if so, carrying out credit assessment on the enterprise according to the assessment data of the enterprise; if not, refusing the loan requestof the application enterprise. Information asymmetry between a financial institution and small and medium-sized enterprises is eliminated. The financial institution is helped to screen small and medium-sized enterprises, loans are provided for small and medium-sized enterprises with high credit, credit relations are established, the fund safety of the financial institution is guaranteed, the fundincome is stabilized. Meanwhile, the problems that the small and medium-sized enterprises are difficult to finance and high in financing cost are solved, and development of national economy is promoted.

There is provided a method of optimising timing packet transport in a network node, the method comprising using a locally available stable frequency reference at the network node to provide a pre-determined network node transit time for timing packets in at least one direction into or out of the network node. There is also provided a network node comprising a locally available stable frequency reference and circuitry adapted to apply a pre-determined network node transit time, L, to all timing packets transiting the network node in at least one direction into or out of a network node dependent on the locally available stable frequency reference.

The embodiment of the invention provides doorbell control method and device. The method comprises the steps of receiving a triggering message sent by a doorbell, wherein the triggering message includes an identifier of the door bell; determining a user account of the doorbell according to the identifier of the doorbell; determining whether an account administrator is in a physical space corresponding to the user account; if not, indicating the doorbell to send a first voice prompt; if the account administrator is in a physical space, acquiring the appointed information of the account administrator; indicating the doorbell to send a second voice prompt according to the appointed information. With the adoption of the method, the doorbell can generate the voice prompt of waiting in patient for the aged visitor, or the voice prompt of notifying that the visited side is in sleeping can be generated in case that the visited side is in sleeping; therefore, the information gap can be avoided, the asymmetry of the information can be removed, and the visitors can know the condition of the visited side and cannot wait without patient.

The invention discloses a group auxiliary recommendation method and system based on intelligent terminal scenes. A large number of recommendation users of item recommendation mobile terminals provide recommendation information for request users of service request mobile terminals so that item recommendation can be completed, malicious recommendation conducted by part of merchants in consideration of self interest is avoided, and the asymmetry of information is eliminated; the credibility degree is set for each recommendation user, the credibility degrees of the recommendation users are automatically updated according to items recommended by the recommendation users and the scores of the items, and the subjectivity of the recommended items is avoided; in addition, scene information of the request users is also considered, and individual recommendation better meeting the requirements of the request users can be provided.

The invention relates to a token distribution mode and system based on a block chain, and belongs to the technical field of block chain technology application. A solution is provided to solve the technical problem that it is difficult for current blockchain token allocation and business behaviors of users to realize interaction behaviors. According to the main technical scheme, a consensus mechanism in a block chain technology is used, transaction data generated by a user and a merchant are utilized, and data is linked in combination with the consumption behavior of the user, so that a token issued based on a block chain is sent to a specified user wallet. The technical problems of automatic user asset bonus allocation and transaction security of the user in the data exchange behavior aresolved. The patent has the technical characteristic that the fund security and transaction data security of the user can be ensured by using the blockchain technology. The patent technology is mainlyused for providing multi-level business model development purposes for any common business model needing pass incentive.

The invention provides a text abstract generation system, a method, a device and a computer readable storage medium, and aims at forming training data through a seq2seq framework and text-abstract pairs to realize a system for generating abstracts for texts. A classic seq2seq framework is used for solving the problem from an uncertain length sequence to a sequence, a Bert Chinese pre-training model is used at an Encoder end to obtain text input information, a two-way decoding mechanism is introduced at a Decoder end, and the quality of a generated text is improved to a certain extent. When theabstract sequence is finally generated, top K results in the two directions are cached at the same time according to the beam-search thought, and finally the result with the highest probability is found and serves as output.

A loudspeaker unit for producing sound at bass frequencies an array of two or more diaphragms. The first radiating surface and the second radiating surface are located on opposite faces of the diaphragm, and one or more of the diaphragms are included in a first subset of the diaphragms and one or more of the diaphragms are included in a second subset of the diaphragms; a plurality of drive units.