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55 results about "Strangeness" patented technology

In particle physics, strangeness (S) is a property of particles, expressed as a quantum number, for describing decay of particles in strong and electromagnetic interactions which occur in a short period of time. The strangeness of a particle is defined as: S=-(nₛ-nₛ) where nₛ represents the number of strange quarks (s) and nₛ represents the number of strange antiquarks (s). The terms strange and strangeness predate the discovery of the quark, and were adopted after its discovery in order to preserve the continuity of the phrase; strangeness of anti-particles being referred to as +1, and particles as −1 as per the original definition.

Method and device for determining freshness of promotion information

InactiveCN106777354AReduce the poor promotion effectReduce the problem of low user satisfactionSpecial data processing applicationsText database clustering/classificationInformation needsData science
An embodiment of the invention discloses a method and a device for determining the freshness of promotion information, and relates to the technical field of information. The method includes acquiring promotion information viewing historical data of users; determining the memorization strength of first promotion information according to the historical data; determining the freshness of second promotion information on preset dimensions according to the memorization strength. The first promotion information and the second promotion information are correlated to each other in the preset dimensions. The second promotion information is current to-be-promoted information. The first promotion information is the promotion information already viewed by the users. The memorization strength is used for indicating the first promotion information memorization strength of the users. The freshness is used for indicating the strangeness degree of the second promotion information. According to the technical scheme, the method and the device in the embodiment of the invention have the advantages that the freshness can be computed, accordingly, bases can be provided for determining whether the promotion information needs to be transmitted to clients or not, the promotion information can be accurately located and transmitted, and effective spreading of the promotion information can be enhanced.
Owner:TENCENT TECH (SHENZHEN) CO LTD

Three-dimensional gravity magnetic multiple acquisition method

ActiveCN101625421ALow random observation errorOvercome No Data ImpactElectric/magnetic detectionGravitational wave measurementMagnetic tension forceControl line
The invention relates to geophysical exploration technology, in particular to a three-dimensional gravity magnetic multiple acquisition method for ground gravity and ground magnetic exploration. The method comprises the following steps: performing three-dimensional flanging measurement supplementation on the edge of the periphery of a three-dimensional target work area, making an edge distance equal to the depth of a target object, and distributing measuring points by amplifying the point distance of the target work area by 1 to 1.5 times; and designing and distributing three-dimensional gravity and magnetic check control lines, repeatedly measuring the three-dimensional gravity and magnetic check control lines in a reciprocating way, checking the observation precision of the measuring points, repeatedly measuring three-dimensional measuring points by orthogonal or imbrication propelling or reciprocating observation, and performing auxiliary observation on the gravity and magnetic measuring points in an interference area. The method can acquire three-dimensional gravity and magnetic inverse spatial data, makes the three-dimensional gravity and magnetic data form a three-dimensional data body which has low random observation error and no strangeness and effectively suppresses near-surface distortion, and improves the 1:50,000 scale gravity and magnetic acquisition observation precision to 0.014mgal and 0.9nT.
Owner:BGP OF CHINA NAT GASOLINEEUM CORP

Method for detecting perforation hole and collar in horizontal well sleeve pipe based on retractor drive current analysis

The invention provides a method for detecting perforation holes and collars in a horizontal well sleeve pipe based on retractor drive current analysis, which relates to a method for detecting perforation holes and collars in a horizontal well sleeve pipe. The method solves the problem that because the prior method for detecting perforation holes and collars in a horizontal well sleeve pipe has high cost and long test period and needs to be operated by professional staff, the prior method is not easy to popularize in oil fields in a large scale. The method comprises the following steps: firstly, converting retractor drive current into 12-bit digital signals, carrying out quick Fourier conversion on the 12-bit digital signals, and determining sampling frequency and decomposition dimensions of small-wave decomposition according to conversion results; then, carrying out the small-wave decomposition on the 12-bit digital signals, extracting a mold maximum value, testing strangeness, and operating Tsallis small wave time entropy sequentially for decomposed small-wave coefficients or signal small-wave reconstruction signals; and finally, outputting information of perforation holes and collars in a sleeve pipe by using a nerve cell network. The method has low cost, short test period and high efficiency and is suitable for being popularized in an oil field in a large scale.
Owner:HARBIN INST OF TECH

Control apparatus for electric-powered power steering apparatus

To provide a control apparatus for an electric-powered power steering apparatus, wherein ripple precision in torque, speed, and other properties is improved, abnormal noise is not made, and strangeness is not felt upon steering, by making the properties of each of the phases of a motor and the control apparatus cancel each other, and converting the properties to desired properties. A control apparatus for an electric-powered power steering apparatus calculates a steering-torque assistance command value on the basis of steering torque to be generated at a steering wheel and vehicle speed, calculates current command values for each of the phases from the steering torque assisting command value, and controls a motor for applying steering assistance force to a steering mechanism, on the basis of current control values calculated from the current command values for each of the phases and current values of each of the phases. In this control apparatus for an electric-powered power steering apparatus, filters having a characteristic of making the properties of each of the phases of the motor and the control apparatus cancel each other are arranged at each of the paths, to make the properties of each of the phases of the motor and the control apparatus conform to each other, and to make the properties of each of the phases of the motor and the control apparatus become desired values.
Owner:NSK LTD

River network one-dimensional steady flow calculation method based on river network incidence matrix

The invention provides a river network one-dimensional steady flow calculation method based on a river network incidence matrix. The method includes a first step of drawing corresponding river network digraphs according to a river network structure, a second step of building the river network incidence matrix according to the river network digraphs, a third step of building a river network one-dimensional steady flow synthesis equation according to the river network incidence matrix, and a fourth step of eliminating strangeness of the river network one-dimensional steady flow synthesis equation and solving the river network one-dimensional steady flow synthesis equation which eliminates the strangeness through the Newton iteration method. The river network incidence matrix constructed through the river network one-dimensional steady flow calculation method can be used for expressing river network information in any structure, thereby being suitable for solution for the river network one-dimensional steady flow of single riverways, loop-free, looped and other forms. Only one river network incidence matrix needs to be constructed, and the river network one-dimensional steady flow can be solved through the Newton iteration method, the river network one-dimensional steady flow calculation method has rapid rate of convergence and can effectively reduce calculated amount.
Owner:HEILONGJIANG PROV WATER CONSERVANCY & HYDROPOWER SURVEY & DESIGN INST

Obstacle detection apparatus

The present invention provides an obstacle detection device capable of accurately conveying the distance between the rearmost part of a vehicle and an obstacle without giving the driver a sense of incongruity. The obstacle detection device (10) detects the obstacle (21) of the vehicle (1) by the sensor part (7). (21) Configuration of a receiver for reflected waves generated by reflection. Predetermined detection distances (L2), (L3) within the maximum detection distance (L1) are varied by a detection distance variable circuit (16). An alarm is periodically generated by the alarm mechanism (20) corresponding to the detection distance.
Owner:HONDA ACCESS CORP

Nonlinear laser fluorescence spectrum real-time identification method

The invention discloses a nonlinear laser fluorescence spectrum real-time identification method, which comprises the following steps: learning a sample spectrum, testing sample spectral classification, extracting ROI in an interested region, preprocessing the spectrum, extracting the fluorescence spectrum characteristics by discrete curvelet transform, forming feature vectors, constructing i classes of support vector machines, and distinguishing the test results by classes. The invention adopts the classification method of the support vector machines, and does not depend on large sample training, the input vector is the low-frequency coefficient part after curvelet decomposition, the number of training samples is small, the number of the support vectors is greatly reduced, so the operation time is shortened and the method has instantaneity. The second-generation curvelet transform adopted by the invention is based on a new support frame, and can provide high-efficient, stable and nearly-optimal sparse representation for the curve function with strangeness. Compared with the traditional method, the method is more effective and has higher identification rate. The invention can identify the spectrum samples with data format and image format, and has better adaptability.
Owner:DALIAN MARITIME UNIVERSITY

Distributed optical fiber for monitoring temperature, stress and deformation of frozen wall and embedding method of distributed optical fiber

ActiveCN105043449ASolve Process StructureSolve the protective structureMeasurement devicesMonitoring temperatureSteel bar
The invention provides a distributed optical fiber for monitoring the temperature, stress and deformation of a frozen wall and an embedding method of the distributed optical fiber. The distributed optical fiber comprises at least two optical fiber sensing carriers which are stacked along a longitudinal direction; the outer side of each optical fiber sensing carrier is provided with U-shaped loop optical fibers and a temperature compensation optical cable along the length direction of the optical fiber sensing carrier; and protective steel bars are respectively arranged at the lateral directions of the U-shaped loop optical fibers and the temperature compensation optical cable. The structure and embedding process of the distributed optical fiber are simple. With the distributed optical fiber and the embedding method of the distributed optical fiber of the invention adopted, problems existing in aspects such as arrangement technique, protection structure and curing method in a frozen wall informationized monitoring process can be solved, and monitoring on the temperature, two-dimensional direction stress and deformation strangeness of the frozen wall can be accurately realized, and the survival rate of optical fiber cables can be improved.
Owner:ANHUI UNIV OF SCI & TECH
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