91results about How to "High target accuracy" patented technology

An improved method for non-invasively measuring a concentration of a target analyte dissolved in a fluid flowing through a sample is presented. It includes directing a probe beam of electromagnetic radiation, consisting of time multiplexed components of different wavelengths, through the sample and measuring the difference of the absorption of the radiation at at least one wavelength pair at different sample states. During sample state changes, the amount of fluid containing the target analyte within the sample is changing, which varies the total amount of target analyte in the sample, as well as the absorption properties of the sample. The sample states are produced, for instance, by compressing and uncompressing the tissue sample. The accuracy of the presented method is enhanced by including continuous estimation of the amount of the fluid containing the target analyte within the sample, and measurement of the variations of the absorption at a wavelength at which the target analyte absorbs significantly. The method is particularly useful in measuring the concentration of a target analyte, such as glucose, in tissue containing blood. An apparatus for performing this method also is disclosed.

A multipolar open radiofrequency ablation catheter is used for sympathetic nerve removal in renal arteries, comprising: a control handle; a catheter body, one end of which is fixed to the control handle; an open frame, including at least one tendon that can be elastically deformed, each One end of the rib is fixed to the other end of the catheter tube body, and the rib extends outwardly from the other end of the catheter tube body in a divergent shape, and electrodes are arranged on each rib, and each electrode can be used to extract nerve electrical signals and ablate , each electrode is connected with a wire, the wire extends along the frame, extends through the catheter tube body to the control handle, and is electrically connected to the control handle; the storage sheath, the catheter tube body passes through the storage sheath, and one end of the storage sheath is connected to the control handle The handle; the storage sheath can move relative to the catheter tube body, so that the other end of the storage sheath moves on the open frame, so that the open frame can elastically contract and be stored in the storage sheath and released from the storage sheath. The radiofrequency ablation catheter has the advantages of simple operation, short operation time, accurate and controllable ablation, and the like.

A miniaturized, increased efficiency x-ray source for materials analysis includes a laser source, an optical delivery structure, a laser-driven thermionic cathode (108), an anode (122), and a target from the laser source and directs the beam onto a surface of the themionic cathode. The surfaces electrons form an electron beam along a beam path. The target element (110) is disposed in the beam path, and emits x-rays in response to incident accelerated electrons from the thermionic cathode. The target element includes an inclined surface that forms an angle of inclination (113) of about 40 degrees with respect to the electon beam path, so that x-rays are emitted from the target substantially at an angle of about 45 degrees with respect to the electron beam path.

The invention relates to a three-dimensional (3D) horizontal well borehole track controlling method, and belongs to the technical field of oil and gas well drilling. The method comprises the steps of determining well drilling parameters according to well drilling equipment and formation lithology; measuring a borehole parameter by measurement-while-drilling tools, revising a formation vertical depth by using geological logging, designing points to be drilled according to known measuring points, regarding the vertical depth as a control target, continuously revising a 3D well section track until drilling to a 3D well section end turning direction; revising a target entering point vertical depth by using geological logging again, performing two-dimensional well drilling to a target point, and performing horizontal section well drilling by using reservoir lithology and horizontal section well inclining determination drilling tool assembly. The 3D horizontal well borehole track controlling method disclosed by the invention has the advantages that firstly the conventional well drilling and directional equipment is used, the cost is quite low, and promotional values are available; secondly, geosteering is performed by using conventional logging, the track is revised continuously, and the shooting precision is greatly improved; thirdly, the design and construction are integrated, the site directional construction is operated easily, and directional engineers construct conveniently.

The invention relates to a direct calibration method for a line structured light vision sensor. The method comprises the following steps: establishing a target formed through standard gauge blocks and by utilizing a three-dimensional precision translation bench; projecting structured light plane to the target through the line structured light vision sensor to form feature points on the target; establishing a space coordinate system on the target; collecting target images and extracting the feature points; establishing a search index table including establishing a direct mapping relation between image coordinates of the feature points and space coordinate system coordinates of the feature points; carrying out calibration on the line structured light vision sensor; and based on the image coordinate of a point to be calibrated, searching the space coordinate system coordinate, which is obtained directly or obtained by utilizing a least squares fitting method, of the point in the search index table, so that the direct calibration of the line structured light vision sensor can be realized. The calibration method is used for the line structured light vision sensor which belongs to the small vision field high precision measurement application field. The calibration method is simple and direct, easy to realize, high in precision and can meet the need of measurement.

A method for increasing the accuracy of a target property value derived from a rock sample is described in which the sample is scanned to obtain a three-dimensional tomographic digital image which can be processed to pore space and solid material phases through a segmentation process. A process is used which revises the segmented volume, e.g., by increasing pore space connectivity, in a manner affecting the target property value that would be derived. Another described method increases the accuracy with which a segmented volume represents a material sample having structure not adequately resolved in an original three-dimensional tomographic digital image. Further, a system for performing the processes, and a segmented digital volume which more accurately represents a sample of a porous media, are described.

Radiosurgical treatments of tissues of the heart mitigate arrhythmias and treat other tumerous and non-tumerous disease using an implanted fiducial positioned in or near the heart using cardiac catheterization techniques. The fiducials may be implanted after diagnostic and planning images of the target tissues have been acquired. Fiducial implantation may take place the day of a scheduled radiosurgical treatment. Techniques to accommodate post-planning fiducial implantation may include registration of the implanted fiducial location with the treatment plan, and active fiducials may limit collateral imaging radiation exposure while enhancing tracking accuracy.

A portable celestial compass (PCC) that provides a new multi-functional capability for high precision target localization. The battery-powered PCC is built around US Army's M-25 stabilized binocular and includes a miniature eye-safe laser range finder, a gyro stabilized binocular, a 3-axis tilt compensated digital compass, and a built-in specialized chip with star catalog and software for target AZ/EL determination and sight reduction. A gyro stabilized binocular rejects up to 98% of image motion caused by hand tremor and platform vibration. Laser rangefinder has the accuracy of ±2 m at 5 km range. The PCC uses celestial objects as absolute references for target azimuth and elevation determination. The azimuth and elevation accuracy is 2 mrad, or 10 m at 5 km range, which is by a factor of up to 5 better than that for a magnetic compass.

A variable drag projectile stabilizer is utilized by a training projectile to match the trajectory of a tactical projectile for up to 3 km while having a range limitation of 8 km. The stabilizer applies supersonic flow phenomena to alter the aerodynamic characteristics of a training projectile while in free flight to fulfill this requirement. The stabilizer uses a cowling supported by struts to provide tail lift and ensure a stable flight path. Supersonic flow is established through ducts formed by the cowling and struts when launched from a weapon. The flow remains supersonic until the projectile reaches the desired range but then quickly becomes subsonic (choked) due to shock waves emanating from interior angles in the ducts. The geometry of the ducts can be designed to create different shock wave patterns within the ducts. The variance of leading edge location, leading edge angle, cowling intake angle, and flight Mach number influences the shock patterns within the ducts and consequently, the range of the projectile.

The invention relates to the field of automatic target scoring equipment, in particular to a curve distribution type shock wave automatic target scoring system. The curve distribution type shock wave automatic target scoring system comprises a walking mechanism and a target frame assembly; the target frame assembly comprises a target rod, a mounting groove seat and a target plate; a sensor support is arranged in a groove cavity of the mounting groove seat, and sensors are arranged on the sensor support; the sensors are sequentially arranged along the same circumferential line, and the center of the circumference is located in the direction of the induction ends of the sensors; the center of the circumference is located on a connecting line of the middle sensor and the central point of target paper; when the circumferential line formed by the sensors is located on the minimum radius, the center of the circumference is located on the central point of the target paper; the target plate is in a square flat tube shape, and the sensor support is located in a cavity defined by the target plate and the mounting groove seat; and a splinter-proof plate for protecting the sensors is located on the face whether the face of the mounting groove seat is in the shooting direction. The curve distribution type shock wave automatic target scoring system is reasonable and reliable in structure, therefore, the working reliability of the equipment is ensured, and meanwhile, the target scoring precision and the target scoring efficiency are further improved.

A toy air gun and in particular an improved air gun for generating vortex rings are described. The gun is designed so that the path along the axis of air motion from the rear of the gun to the air exit hole is optically transparent, and contains patterns normal to this axis that assist in accurate sighting. This allows targets to be directly sighted along the axis of air or vortex ring travel. Together with improvements to ensure purely axial air motion, this dramatically increases the aiming accuracy of this class of gun and makes it suitable for target-type activities. A screen with a cylindrically symmetric pattern of openings and aiming marks prevents solid objects placed inside the gun's barrel from being projected outwards, and assists in aiming the gun. An vented safety guard at the exit end of the gun prevents large pressures from developing in the event that the gun exit is blocked while preserving the vortex ring component to the airflow.

A finless cone-nosed, ogival-nosed, or combination ogive-cone nosed training projectile is statically stable, yet has adequate spin rate to compensate for aerodynamic or mass asymmetries. In addition, the training projectile can be fired from smooth bore or rifled cannons of various calibers, including 120 mm and 105 mm. Spin torque and stability augmentation are provided by a radially angled slotted tail flange attached to the rear of the training projectile, providing high performance and improved accuracy at low cost for use in training exercises. The training projectile has a higher static margin than conventional devices, and provides the ability to train personnel with a training projectile that achieves flight ranges similar to its matching tactical projectile, and has improved accuracy.

A laser shooting training system includes a target device including a target area and a camera for photographing the target area, and an analysis device for calculating a coordinate of a laser discharged to the target area based on an image photographed by the camera, and displaying a spotted position corresponding to the laser coordinate to a user display screen. The analysis device calculates a center coordinate of a laser area included in the image, corrects the center coordinate based on a correction value relating to a size of the laser area, and calculates the laser coordinate.

The invention relates to a sabot (4) for a sub-caliber projectile (1) having a projectile core (2). When the projectile exits a weapon barrel, the sabot detaches from the projectile core (2) without transferring momentum by means of a separating aid (4) incorporated between the projectile core (2) and the sabot. The separating aid (4) has a plurality of fingers (5) having at least one predetermined breaking point (8a, 8b), which is connected to the projectile core (2) by a type of snap-connection bead (6) on the fingers/braces (5).