36results about How to "Does not affect calculation results" patented technology

The invention discloses a user privacy protection method in personalized information retrieval. The user privacy protection method in personalized information retrieval is a user interest model anonymization method based on difference privacy and aims to remove contradiction between user privacy protection and improvement of personalized information retrieval performance. The user privacy protection method in personalized information retrieval aims to conduct anonymization after identifiers of a user interest model are concealed, and namely after the identifiers (including the ID, the name, the ID number, the SSN and the like of a user) are eliminated, related technologies of the difference privacy are mainly used for anonymizing standard identifiers of the user interest model. Namely, generalization is conducted on the standard identifiers of the user, Laplace noise is added so as to enable difference privacy protection requirements to be met, the inquiry precision of a statistical database is maximized, and the probability of identification of an entity and attributes is minimized. The user privacy protection method in personalized information retrieval can be widely applied to service systems, such as a personalized retrieval service system and a personalized recommendation service system. The invention belongs to the technical field of information and computers.

The invention discloses a device and method for positioning a workpiece on a linear conveyor belt through a visual system. The workpiece is placed in a photographing area to be fixed. A visual system photographs and records the position information of the workpiece in the photographing area, the linear conveyor belt conducts linear conveying on the workpiece from the upstream direction to the downstream direction, and the conveyor belt is stopped after conducting conveying for a distance. A pulse encoder detects linear distance data which are generated after the linear conveyor belt moves and transmits the data to a robot. The robot analyzes the data and works out the needed compensation amount for a work track, accurate positioning is achieved, and finally the robot acts on the workpiece. By means of the device and method for positioning the workpiece on the linear conveyor belt through the visual system, far-end visual positioning is used for near-end work track compensation, and compared with a dynamic linear tracking technology, compensation precision is high, and in addition the speed of the conveyor belt can be higher.

The invention discloses a linear motor rotor position measuring method. The linear motor rotor position measuring method is characterized in that a reference image with the gray level gradually changing is arranged on a base of a linear motor, a video camera fixedly arranged on a motor rotor continuously shoots the reference image, single-line sampling is carried out on every two adjacent obtained images many times at intervals, the image information of the same lines corresponding to the two images is extracted in each-time single-line sampling, a phase correlation algorithm based on singular value decomposition (SVD) is carried out on the two single-line images obtained through each-time single-line sampling to obtain the horizontal movement values of the two single-line images in the motor rotor moving direction, statistics is carried out on the obtained multiple horizontal movement values to obtain the most precise horizontal movement value, and then the displacement and the speed of the motor rotor can be obtained. According to the method, the simultaneous multi-sampling single-line processing is suitable for hardware parallel processing, and achievement is easy. The linear motor rotor position measuring method is used for achieving the precise measurement of the position of the linear motor rotor, and the real-time performance and the anti-interference in the measuring process can be guaranteed.

The invention provides an improved bidirectional bilateral range-finding method. According to the method, a moving node continuously transmits signals to all fixed reference nodes twice, wherein one of the fixed reference nodes is a main fixed reference node, and the other fixed reference nodes are slave fixed reference nodes. The moving node transmits timing signals twice, and the main fixed reference node transmits a timing response signal once, thereby completing the measurement of the distance difference between the moving node and the main and slave fixed reference nodes. Meanwhile, the second timing signal transmitted by the moving node and the timing response signal transmitted by the main fixed reference node serve as the former two signals in the bidirectional bilateral range-finding. According to the invention, the method is high in positioning precision. Meanwhile, the method can achieve the measurement of a plurality of distance differences through two timing signals transmitted by the moving node, so the method can achieve the measurement of the distances from the moving node to all fixed reference nodes through one operation. The method is lower in power consumption,and solves a problem that multiple bidirectional bilateral range-finding consumes a lot of time.

A chemical and biological transducer is prepared by setting long period fibre grating, reflecting film on fibre section, fibre covering and fibre core on one piece of fibre to for a Michelson interferometer and then forming a fibre evanescent wave chemical and biological transducer based this interferometer. The sensing system comprises wide band light source, fibre, chemical and biological transducer formed as above, wide band coupler, fibre spectrograph and computer.

The invention relates to a cause map with time nodes, which comprises a time axis composed of a plurality of time nodes, and event nodes respectively and correspondingly connected with the plurality of time nodes on the time axis, and the event nodes are connected with one another according to corresponding constraint conditions. The cause takes time as a node in the map rather than as an attribute of an event. Compared with a traditional knowledge graph or event graph, the cause map has obvious expandability and the calculation performance is remarkably improved, and the application effect isgood.

The invention provides a temperature measurement method and system for correcting a dual-wave-band temperature measurement error. At a correction stage, radiation energy and temperatures of a reference object at two different wavelengths are measured by using a thermodetector for dual-wave-band temperature measurement, and a formula expressing a relation between a logarithm of an emissivity ratio and l/Tdual is solved by fitting; and at a measurement stage, radiation energy and temperatures of a measured object at two wavelengths are measured by using a thermodetector for dual-wave-band temperature measurement, and an actual temperature of the measured object is calculated based on the calculated l/Tdual value and the formula obtained at the correction stage. Because the Tdual value is calculated based on the ratio value of the radiation energy and is not affected by the dielectric interference of the measurement path, the dual-wave-band temperature measurement error can be corrected effectively and the measurement result becomes accurate.

The invention discloses an elevator starting torque compensation method which is used for calculating a torque value which needs to be compensated when an elevator system is started. The elevator system includes a main controller, a speed controller, a starting torque compensator, a torque controller and an executing mechanism; a computing method includes the steps that step 1, a variable is defined; step 2, a value is assigned to the variable; step 3, the variable assignment is recalculated by detecting present running speed feedback information of an elevator; step 4, a value is assigned toa torque compensation value according to a variable result; step 5, the variable value is added with 1; and step 6, the step 3 is repeated again. According to the elevator starting torque compensationmethod, calculated results are high in veracity, calculated speed is high, and the calculated performance is independent of the elevator nature.

The invention discloses a circuit device and method for improving consistency of thermal printing concentration, and relates to the technical field of thermal printers. The method comprises the stepsof measuring and calculating battery voltage Vbat, battery internal resistance Rbat, conduction resistance Rg of a thermal printing head power supply switch, starting a motor for pre-feeding paper, measuring Vsys, Isys and VH when heating n points simultaneously, calculating the total current flowing through a printing head circuit during pressurization, obtaining current to-be-printed data, calculating the number of current to-be-heated points, calculating the heating time T under the current concentration requirement, and performing printing. According to the circuit device and method, through reasonable circuit design, the current and the voltage of the system and the voltage on a thermosensitive head are measured in the heating process, the next VH voltage is calculated according to the current heating point number and the next heating point number, and the relatively accurate power-on time is further calculated, so that the purpose of controlling the concentration consistency is achieved.

The invention relates to a numerical simulation method and system for solid propellant waste cutting treatment. The method comprises the steps of establishing a jet flow nozzle geometric model and a solid propellant geometric model; establishing a liquid-solid particle two-phase flow physical model of the pre-mixed abrasive water jet; establishing a kinetic control equation of the solid propellant; selecting three material parameters of an abrasive, water and the solid propellant; dispersing the liquid-solid particle two-phase flow physical model of the pre-mixed abrasive water jet by adoptingan SPH method; discretizing the kinetic control equation of the solid propellant by adopting the SPH method; establishing a time integral format; according to the jet flow nozzle geometric model, thesolid propellant geometric model, the discretized two-phase flow physical model and the discretized solid propellant dynamics control equation, carrying out numerical simulation calculation in a timeintegral format, so as to obtain field variables at different moments. According to the invention, the field variables can be quickly and accurately determined.

The invention provides a multi-line flow distribution method and device and electronic equipment, and the method comprises the steps: obtaining dotting data uploaded by a plurality of clients; performing statistical processing on the dotting data, determining sub live broadcast duration of each line, and determining expected duration; respectively determining the user increment of each line withinthe expected duration, and determining the duration ratio of the total live broadcast duration of each line to the total live broadcast duration of all the lines; and determining the completion degree of each line according to the duration proportion of each line and a preset flow expected proportion, and determining a current line recommendation sequence. According to the multi-line flow distribution method and device and the electronic equipment provided by the embodiment of the invention, the flow values of the lines does not need to be obtained, but the flow is replaced by the live broadcast duration, and the final calculation result is not influenced. The flow to be generated by each line is predicted based on the expected duration, the situation of line switching can be effectivelyavoided, and the predicted numerical value is more accurate.