255results about How to "Maintain precision" patented technology

Disclosed is an auto-focus apparatus including an evaluation value calculator periodically calculating evaluation values using high frequency components of image signals in a specific region of a subject image, a distance measurement unit measuring a distance to a subject and output a distance measurement result, a control unit outputting instruction values based on the evaluation values and determines whether a subject image is in-focus or out-of-focus, and a storage storing the distance measurement results and lens positions. In the apparatus, after searching the peak of the evaluation values, the control unit returns the lens to the position at which the relative maximum has been detected, obtains evaluation values, stores lens positions and distance measurement results when the evaluation values satisfy a prescribed condition, and retrieves distance measurement results and lens positions when the number of times that results are stored reaches a prescribed number, and computes a correction amount.

The invention discloses a map display method for a short message address. The map display method comprises an address matching module, an associating module, a storage module and the like. The content of a user short message is matched by a terminal through a built-in address feature template base, and a matched possible address is displayed in different forms and is associated with map software installed in the terminal of a user. When the user clicks the content of the address, a map application of the terminal is triggered, and the correspondingly associated map software is started with the address clicked by the user serving as a parameter. After the map software is started, the position corresponding to the map is located by the starting parameter and is presented on the terminal. The address of the short message content is automatically matched, the software for triggering the map is provided, and in this way service experience for conveniently locating the address is provided.

A liquid transfer device is provided for biochemical assay, including a pipette forming an interior space extending in an axial direction and having first and second ends. The first end forms an opening and the second end forms an enclosed variable volume, whereby variation of the volume causes a change of pressure to selectively induce a suction force and a releasing force in the pipette. An analysis container includes a plurality of receptacles retained by a slab. A film covers the slab to seal the container. A movement control device includes a manipulator that releasably holds the pipette and a tray that forms a cavity for receiving and retaining the container. The pipette and the tray are movable with respect to each other in order to fill/draw test agent into/out of the receptacles.

The present invention relates to methods of making microstructured laminae for replication and apparatus. In a preferred embodiment, the invention relates to machining V-shaped grooves on individual lamina forming cube-corner microstructures.

The present invention relates to a system for managing operational facilities that is of the type which utilizes predefined events to carry out managing operations for the facilities. The system includes one or more servers adapted to receive events from a client and forward the events to a clearinghouse via a communication link. The system further includes one or more clients, each of which has a unique login identity, adapted to selectively send events to the server via the communication link. Also included is a clearinghouse connected to each of the server and each of the client via the communication link for selectively storing data from each server and each client in a database, and being adapted to selectively authorize predetermined events by each client according to the login identity of each such client, to selectively schedule predetermined events in response to data stored in the database and to monitor the status of all events stored in the database.

The present invention relates to a system for managing operational facilities that is of the type which utilizes predefined events to carry out managing operations for the facilities. The system includes one or more servers adapted to receive events from a client and forward the events to a clearinghouse via a communication link. The system further includes one or more clients, each of which has a unique login identity, adapted to selectively send events to the server via the communication link. Also included is a clearinghouse connected to each of the server and each of the client via the communication link for selectively storing data from each server and each client in a database, and being adapted to selectively authorize predetermined events by each client according to the login identity of each such client, to selectively schedule predetermined events in response to data stored in the database and to monitor the status of all events stored in the database.

A system and method for matching similar master data using associated behavioral data, for example transactional data. Matching accuracy is significantly increased. Master data may be thought of as nouns. Behavioral data is associated with master data as verbs are related to nouns. Specifically, behavioral data is data associated with an action taken by a master data object. Behavioral data may include temporal and non-temporal data. Temporal data for example may include time and/or duration that a behavior occurred. Non-temporal data may include a physical location, a product, a phone number or any other quantity other than time. Using behavioral data in duplication testing adds another dimension to de-duplication that is not achieved through comparison of master data object fields alone. For example, a duplication test on two similar “person” records with similar “name” field values is improved by comparing associated “behavior” data, (phone numbers called by each “similar person”).

A method for preserving digital evidence of a computer misconduct, the method including the steps of: prior to the misconduct, installing an expansion card capable of retrieving and storing a memory image and register information from a digital electrical computer in which the expansion card is installed; connecting a switch to regulate the expansion card from a location other than the computer; at the time of the misconduct, using the switch to trigger the retrieving and storing of the memory image and the register information into the expansion card; and subsequent to the misconduct, extracting the expansion card to preserve digital evidence of the computer misconduct. This method can be carried out further by subjecting the memory image and register information from the expansion card with another computer to forensic analysis.

A wraparound delay amount detecting part calculates a cross-correlation r(k) from an output speech signal “a_i” supplied to a loudspeaker and an input speech sigal “b_i” inputted through a microphone array to obtain a delay amount “d” of a wraparound speech signal. The delay processing part generates a speech signal “a_i-d” obtained by delaying the output speech signal “a_i” by the delay amount “d”. Even if there is a change in delay amount due to the variation in environment, appropriate delay processing can be conducted by the delay processing part. In an adaptive filter, an estimated wraparound speech signal a_i-d′ is generate from the speech signal “a_i-d” subject to delay processing. A subtracter subtracts the estimated wraparound speech signal a_i-d′ from the input speech signal “b_i” to generate an echo cancellation signal “e_i”. A coefficient updating part updates the coefficient of the adaptive filter.

Modular mold equipment for producing concrete culverts with tight tolerances. Modular mold equipment having a coupling plate is used to align and interconnect components of the mold. The components being aligned may have recesses for receiving the coupling plate. Modular mold equipment system with an extended size range to cover all standard concreted duct product sizes. Modular mold equipment having a pallet guide adjustment mechanism adapted for setting the pallet at a desired location in relation to a form. The desired location is based on a wall thickness of a concrete culvert to be produced. Modular mold equipment having a core that includes a core corner and another core component adapted to be coupled to the core corner, and locking apparatus adapted to lock the core corner to the other core component via a mechanism that extends outside the core.

The disclosure relates to measurement and classification of tissue structures in samples using a combination of light imaging and spectroscopy, in particular although not necessarily exclusively for detection of tumours such as basal cell carcinoma or breast tumours in tissue samples. Embodiments disclosed include a method of automatically identifying tissue structures in a sample, the method comprising the steps of: measuring (1702, 1703) a response of an area of the sample to illumination with light; identifying (1704) regions within the area having a measured response within a predetermined range; determining (1705) locations within the identified regions; performing (1706) spectroscopic analysis of the sample at the determined locations; and identifying (1707) a tissue structure for each region from the spectroscopic analysis performed on one or more locations therein.

The invention discloses a low pass filter, an active power filtering device and a harmonic detection method based on the active power filtering device.. The low pass filter is formed by an IIR (infinite impulse response) filter and an MA (moving average) filter in a cascade manner. The active power filtering device comprises a main circuit, a mutual inductance regulating circuit, an AD (analog-to-digital) sampling circuit, a detection circuit and a control circuit, wherein the main circuit is used for injecting compensation current to a three-phase power grid, the detection circuit utilizes the low pass filter, and the control circuit is used for forming a driving signal of the main circuit. Through utilizing the active power filtering device, the harmonic detection method disclosed by the invention comprises the following steps of: sequentially detecting, regulating and carrying out AD sampling on load current of the three-phase power grid; extracting harmonic current; and forming a driving signal according to the harmonic current. The invention prevents a problem that the separation of direct current amount and alternating current amount of active current and reactive current is poor in the traditional harmonic detection technique, improves the filtering precision, has quick dynamic response and can quickly and exactly detect the content of the harmonic current in the power grid.

The invention discloses a 3D geologic modeling method based on T splines. The T splines serve as a spatial data structure of 3D geologic modeling, 3D modeling is carried out aimed at a complex form of a geologic object, and the complexity of geologic construction is described quantitatively. The method comprises the following steps that geologic data of multiple sources is integrated; the construction complexity of the geologic object is analyzed on the basis of the geologic data; geologic objects are divided into two types, and are modeled in a T spline based parameter curved-surface modeling method or a T spline based refined curved-surface modeling method respectively; and the 3D models of the geologic objects are integrated and examined, and a final 3D geologic model is obtained. The method of the invention can be used to establish real-form 3D models including geologic constructions as deposition, wrinkling, intrusion, non-integrated surfaces and tomography, and an accurate reliable initial model is provided for computer-assisted design and value simulation analysis as lithology prediction, seepage and grouting simulation and stability analysis.

The invention relates to the technical field of spacecraft control and particularly discloses an integrated analyzing and setting method for control parameters of a three-loop automatic pilot. The integrated analyzing and setting method comprises the following steps of: firstly, establishing a control loop model of the three-loop automatic pilot; secondly, setting a pitching motion relative damping coefficient after compensating an attitude angular velocity feedback circuit to acquire an attitude angular velocity control parameter and the open-loop cross-over frequency of the attitude angular velocity feedback circuit; thirdly, acquiring an open-loop gain system of a control system according to an open-loop transmission function of the control system and acquiring a closed-loop transmission function which is inputted to a guidance spacecraft by an overload instruction after correction and is outputted in an overload manner; and fourthly, acquiring the attitude angular velocity control parameter, an overload feedback control parameter and an overload instruction correction parameter. According to the integrated analyzing and setting method, the solving of a nonlinear equation is avoided; in addition, attitude stability and attitude control precision of the guidance spacecraft can be maintained by the acquired parameter under various single deviations and combined deviation and the balancing state of the spacecraft required by the guidance instruction is quickly realized.

A method of inserting a new image into a dynamic digital video file comprises identifying a target digital video segment into which the new image is to be inserted, projectively transforming the digital video segment from a first state to a second state, the second state being one which defines a substantially undistorted background, primed for new image insertion, and wherein any feature differences as between the first state and the second state are adjustment features; recording segment into data related to the adjustment features; selecting a point of insertion of new image; and blending the new image with the second state of the target digital video segment, weighing the adjustment features against each such that any visual cues which would mark placement of the new images as incongruous are adjusted.

The invention puts forward a virtual studio mobile robot visual localization method based on improved Apriltag tags, comprising the following steps: adding four uniformly-sized ring markers at the appropriate length of quadrilateral diagonal extension cords of a tag; calibrating a camera; acquiring tag images: preprocessing the acquired images; carrying out threshold processing on ROI region extraction; identifying elliptical markers; extracting the ROI region; carrying out threshold processing on the minimum rectangular area surrounding the four points which is the ROI tag area of the tag images with the coordinates of four ellipse centers on the improved tags as the benchmark; extracting tag corner points and fitting the extracted straight lines by the weighted least square method, calculating intersection points of straight lines to obtain subpixel-level corner point coordinate, and extracting image coordinates of the tag corner points; reading the coded message of the tags according to the extracted image coordinates of the corner points, obtaining world coordinates of the corner points, and obtaining the pose of a robot by coordinate transformation. The method of the inventionhelps reduce the data size of the identification tags and improve the real-time performance of identification.

A fire detection system for monitoring a volume containing fluid, typically air, for the presence of smoke particles is disclosed. A conduit for receiving the fluid, and any smoke particles therein, and directing the fluid to a smoke detector has a plurality of inlets formed therein. A respective temperature sensor is associated with each of the inlets which generate a signal indicative of a change in temperature in the region of the inlet. In the embodiments, the temperature sensor comprises one or more fibre Bragg gratings. The fibre Bragg gratings preferably have different grating periods. The reflected light from each fibre Bragg grating is returned back down the fibre optic cable and redirected via a 2×1 coupler to a wavelength detection system and a personal computer. The combination of wavelength detection system and personal computer allow analysis of the reflected light patterns, as well as providing a user interface which enables detection of the occurrence of a spatial and/or a temperature variation. The location of the said variation along the fibre optic cable is advantageously detectable. The system described is highly sensitive to smoke, but can advantageously also provide an indication of the location of the smoke source, because any variation in temperature at any one of the smoke inlets is also detected, the location of the sensor being known.

The invention relates to a method for controlling electronic pole inversion of a multiphase induction motor on the basis of vector control. In the invention, the characteristic of multiple control freedom degrees of the multiphase motor is utilized and a current of each d-q plane is subjected to independent decoupling control by adopting rotor field-oriented vector control, so that the motor is controlled to operate in rotary magnetic fields with different pole pairs. Compared with the conventional pole inversion technology, the method has the advantages that the electronic pole inversion under a non-shutdown condition is realized; not only can the constant power operation range of the motor be enlarged, but also the large pole pair is adopted and the motor has good starting performance at low speed and the small pole pair is adopted at high speed; and the same speed has low current frequency relative to variable frequency speed regulation, so that the switching frequency and the ironconsumption are reduced. Moreover, in the electronic pole inversion process, the current and torque transition is smooth. The method has high reliability and is particularly suitable for high-power places.

The invention provides a device and method for eliminating, reducing and homogenizing the residual stress in the milling, boring, drilling, planning and other machining processes in which machined components are fixed and kept unmoved. According to the device and method, a plurality of high-energy sound wave exciters on a working table are tightly coupled with the components coated with coupling media, high-energy sound waves are emitted into the components, and the residual stress inside the machined components is eliminated, reduced and homogenized by utilizing the elastic wave energy whichis generated in the components by the high-energy sound waves. Thus, the purpose that the residual stress is eliminated and homogenized and meanwhile machining is carried out is achieved, the stress-elimination-free machining control is achieved, and it is ensured that the deformation amount in the machining process of the mechanical components and the deformation amount after the machining are the minimum.

A method and apparatus for converting a high precision digital word into a high precision analog signal is disclosed. A sigma delta modulator applies a digital input signal to a dither signal to generate a combined signal for sampling. A digital-to-analog converter quantizes the combined signal. An analog filter provides a cutoff at a bandwidth of interest to remove out of band quantization noise and signals. An I transfer function and a Q transfer function can be coupled between the sigma delta modulator and the digital-to-analog converter for mapping of the combined signal. The apparatus can also include a phase interpolator for receiving the output signal and outputting a clock recovery phase.

A wireless communication apparatus includes an antenna receiving a radio signal, a variable gain amplifier amplifying the received signal using a variable gain, an analog-to-digital converter converting the amplified signal into a digital signal, a gain setting unit periodically updating the gain of the variable gain amplifier in accordance with an output from the analog-to-digital converter, and an operating mode selection unit selecting one of a plurality of operating modes characterized by different gain updating periods in accordance with the output from the analog-to-digital converter, the selected operating mode being set in the gain setting unit. With this construction, the precision in conversion by the analog-to-digital converter is maintained at a proper level when an environment for signal reception varies.

A tooling base that is an improvement over current designs in the form of simplified number of parts and easier manufacturing of parts is described. The tooling base uses alignment fixtures on threaded rods that are restricted in their movement within the tooling base by stops. The stops are located either on the threaded shafts or on the alignment fixtures. This allowed degree of movement enables simplified part design and manufacture while maintaining the precision and accuracy of registration of a tooling fixture with the tooling base.

A wireless transmission device includes a wireless reception unit which receives and demodulates a wireless frame in which a local area network (LAN) signal including a timing packet and an error detection code are multiplexed and converted into a high-frequency wireless output signal from a wireless transmission path, separates the LAN signal from the demodulated wireless frame, and calculates a wireless frame error rate by detecting a signal error of the wireless frame from the error detection code within the wireless frame, and a holdover switching unit which switches an operation mode from a timing reproduction mode in which a clock and a timing pulse are output based on a cycle and a phase reproduced from a timing packet included in the LAN signal to a holdover mode in which a clock and a timing pulse are output based on a cycle and a phase saved at a normal time when the wireless frame error rate calculated by the wireless reception unit is greater than a first threshold value.