632results about How to "Accurate observation" patented technology

An objective optical system includes a first group having positive refractive power and a piano-convex lens with the convex surface facing the image side; a second group having positive refractive power and a lens whose extreme-object-side lens surface is a convex surface facing the object side; a third group having negative refractive power and a lens whose extreme-image-side lens surface is a concave surface facing the image side; a fourth group having positive refractive power and a lens disposed on the extreme object side, whose image-side lens surface is a convex surface facing the image side and a lens disposed on the extreme image side, whose object-side lens surface is a convex surface facing the object side; and a fifth group having positive refractive power and a combined lens formed by joining a convex lens and a concave lens, the joined surface having negative refractive power.

Arrangement for executing and monitoring rotablation, in which a rotating drill head arranged at the tip of a catheter removes plaque adhering to a vessel wall while pushing aside normal vessel tissue, with a rotablation catheter and an IVUS catheter being integrated into one constructional unit.

Provided is a laser scanning observation device including: a window unit provided in a partial area of a casing and configured to be in contact with or close to an observation target; an objective lens configured to collect laser light on the observation target through the window unit; an optical path changing element configured to change a direction of travel of the laser light guided within the casing toward the window unit; an astigmatism correction element provided in a front stage of the window unit and configured to correct astigmatism occurring upon the collection of the laser light on the observation target; and a rotation mechanism configured to allow at least the optical path changing element to rotate about a rotation axis perpendicular to a direction of incidence of the laser light on the window unit to scan the observation target with the laser light.

An endoscope system is provided in which blood vessels (pits) are extracted from an image captured by an endoscope to perform pattern matching with vascular patterns (pit patterns) associated with the cancer invasion depth and operations such as enhanced display of blood vessels, suggestion of preferred imaging conditions and display for diagnosis support are performed based on the matching result. The endoscope system enables even a less-experienced doctor to correctly diagnose the cancer invasion depth.

The invention provides a staged fracturing or synchronous fracturing simulation experiment method for a shale horizontal well. The method comprises the following steps: (a) the natural fracture morphological characteristics of shale in a stratum to be simulated are analyzed; a shale outcrop material for producing a simulation test piece is selected, and the shale material is machined to a cube rock mass according to the shale settled layer characteristics; and the surface of the mass is brushed with resin adhesive for sealing; (b) a through hole is drilled in the middle of the test piece; and when the synchronous fracturing of the horizontal well is simulated, two equal holes are drilled; (c) silent crushing agent slurry filling sections are added in the drill holes; and the needed number of fracturing sections is produced by partition pieces; and (d) the simulation fracturing experiment is performed by using the simulation test piece; and fracture morphology image information in a rock core is obtained after the experiment. For brittle shale with natural fracture development, the method is easy to realize the experimental simulation of staged fracturing or synchronous fracturing of the horizontal well. Meanwhile, the high-energy CT scanning is performed for the test piece through a linear accelerator nondestructive testing system to realize precise observation of a shale fracturing net. The experiment method can be applied to the research on propagation rules of the shale fracturing net under the effect of matrix pressure transfer.

The invention provides a method for observing a rotary speed of am induction motor of a Kalman filter with index fading factor, belonging to the field of drive control of motors. The method solves the problem that the observing result of state variable is influenced because the matrix error of the noise covariance is great in the standard Kalman filter EKF (Extended Kalman Filter) algorithm which is used for observing the rotary speed of the induction motor in the prior art. In the invention, the method realizes the rotary speed observation on the basis of a rotary speed observer and the Kalman filter is utilized in the rotary speed observer to carrying out error predication; the index fading factor lambda (K+1) is introduced into an error covariance matrix predictive equation of the Kalman filter in the process of realizing the rotary speed observation by operating the rotary speed observer; and the error covariance matrix predictive equation is shown in the specification. The method provided by the invention is suitable for observing the rotary speed of the induction motor.

The invention provides a treatment method for large-thickness collapsible loess. The treatment method comprises the following steps: 1) sinking small-diameter steel casing into soil to form pile holes each having a depth equal to or smaller than the thickness of the collapsible loess stratum; 2) inserting (1) 1-6 drain boards or (2) hollow water pipes with a plurality of drain holes or (3) hollow steel pipes with a plurality of nozzles into the pile holes to bottom ends thereof; 3) repeating the steps 1) and 2) until the pile holes with the water injection fittings are formed everywhere in the field; 4) injecting water or injecting water under pressure into the water injection fittings in the pile holes to cause self-weight collapsible settlement of the collapsible loess after immersion; 5) observing and recoding the collapsible settlement amount of the soil mass in a foundation until the collapsible deformation of the soil mass in the foundation is stable; and 6) reinforcing the top-layer soil mass of the foundation by use of a filling compaction method or a dynamic compaction method. The treatment method has the characteristics and advantages of high construction speed, remarkable effect of eliminating loess collapse, dry operation, high bearing capacity, and the like.

An ultrasonic diagnostic apparatus includes an ultrasonic observation unit that forms an ultrasonic tomographic image based on an ultrasonic signal obtained by transmission/reception of the ultrasonic wave to/from inside of the living body, a position orientation calculation unit that detects the position and/or the orientation of the ultrasonic tomographic image, a reference image memory that stores the reference image data, a 3D guide image forming circuit that forms a stereoscopic 3D guide image for guiding an anatomical position and/or orientation of the ultrasonic tomographic image based on the reference image data stored in the reference image memory using the position and/or the orientation detected by the position orientation calculation unit, and a display unit that displays the 3D guide image formed by the 3D guide image forming circuit.

A microdosimeter, comprising an array of three-dimensional p-n junction semiconductor detectors, each providing a sensitive volume-target and a tissue equivalent medium for generating secondary charged particles. The array is manufactured from a semiconductor on insulator wafer and the detectors are located to detect secondary charged particles generated in the tissue equivalent medium.

A solid sample fabricating method includes preparing a specimen containing a first substance, which is in a liquid phase at normal temperature and normal pressure, and a second substance different from the first substance, which is in a solid or a liquid phase at the normal temperature and the normal pressure, the second substance being dispersed in the first substance, and attaching the specimen as a droplet to a surface of a cooled stage, whereby an entire region to be observed is converted into an amorphous state.

An arrangement, equipped with a holder 9, which supports a solid immersion lens 3 in the gravity direction with the bottom surface of solid immersion lens 3 being protruded downward through an opening 9b, is provided. With this arrangement, when solid immersion lens 3 is set on an observed object, solid immersion lens 3 is put in a state in which it is raised by the observed object and is made free with respect to holder 9. Also in this state, an excessive pressure will not be applied to the observed object and yet solid immersion lens 3 is put in close contact in conformance with the observed object and temperature drifts at the holder 9 side or the observed object side are cut off from the counterpart side and thus the influences of such temperature drifts are eliminated. A solid immersion lens holder, with which the damaging of the observed object can be eliminated and which enables high-precision observation, is thus provided.

The present invention achieves a heating stage for a micro-sample, capable of efficient heating and accurate observation of the micro-sample. A micro-sample mount is a heating portion in coil form and is fixed at both ends to a base for the heating stage for the micro-sample. The base can be divided into two members at a base cut line, and the mount is fixed at one end to the first member and is fixed at the other end to the second member. A sample subjected to micro-sampling is mounted on the mount. The base is removed from the tip of a holder, and is mounted on a stage for the sample stage. A current is fed to the micro-sample mount through the members to thereby apply heat to a micro-sample for observation.

The invention especially relates to a hybrid crawling and swimming unmanned submersible and an application method thereof, belonging to the technical field of underwater equipment and system for oceaneering. According to a technical scheme in the invention, the hybrid crawling and swimming unmanned submersible is characterized by comprising an unmanned cruising device (1) and at least multi-joint mechanical legs (2). The hybrid crawling and swimming unmanned submersible can carry out both rapid cruising in an ocean via the unmanned cruising device (1) and stable crawling at a seabed via the multi-joint mechanical legs (2); the unmanned submersible has high-efficiency large-scale maneuvering capability as an autonomous underwater vehicle (AUV), precise moving and positioning capabilities as a remote operated vehicle (ROV) and anti-ocean current stabilizing power as a crawling robot; and the unmanned submersible has the characteristics of high stability, low energy consumption and good environment adaptability and meets application demands for close-distance accurate stable observation and sampling, salvaging, searching and rescuing and the like in a complex seabed environment.

The invention discloses a plant rhizosphere box and the application thereof in the micro-domain research of wet land plant rhizosphere. The plant rhizosphere box comprises a box body, the inside space of the box body is partitioned into a root zone, a near root zone, a far root zone and a non-root zone and other different rhizosphere micro-domain partition zones by a number of rhizosphere partition plugging plates, water distribution units are arranged on the upper part of the box body, and water level regulating units are also arranged on the box body; and a water discharging device is arranged on the bottom of the box body. Through the adjustment of the intervals between the different rhizosphere micro-domain partition zones, the accurate observation and the research of the differentiation changes of different distances from the root system, and/or root zone soil, and/or interval water nutrients, pollutant, and/or microorganism are achieved. Based on the plant rhizosphere box, water flooded habitat of plants grown in wet land can truly be simulated, so that water flow conditions in the substrate can be maintained, and different water pressure retention time and water levels are arranged according to the needs, and the plant rhizosphere box has wide application prospect in plants, especially in the micro-domain research of wet land plant rhizosphere.

The invention discloses an eye fundus image structure segmentation method based on full convolution neural network. The method comprises the steps of firstly marking the macula, optic disc and optic cup of each fundus image sample, and generating the corresponding target result map of each fundus image sample; then using each fundus image sample and corresponding target result map as a pair of training image samples to obtain the training image sample set; using the training image sample set to train the full convolution neural network, and inputting the fundus image to be segmented to the full convolution neural network to get the corresponding target result map; then using the K-means clustering and ellipse fitting to get the segmentation result. The method of the invention can improve the precision of the fundus image segmentation and better distinguish the normal physiological structure of the fundus.

A tilted illumination observation method and observation device with easy adjustment, high speed, good reproducibility and low cost is provided. A high resolution tilt image of a specimen is obtained by extracting the blurring on the scanning spot occurring during beam tilt from the image (step 6) captured by the tilted beam, and the image (step 4) captured from directly above the standard specimen; and then deconvoluting (step 11, 12) the tilted image of the target specimen (step 10) using the extracted scanning spot from the oblique beam.

An ion resonance condition is corrected accurately in an ion trapping device. Measurements are repeated by alternately applying and not applying a resonance frequency voltage while spectral data is obtained continuously. Data obtained in the absence of the resonance frequency voltage is used as reference data to correct the set data of a resonance condition. As a result, calibration can be made while taking into consideration the variations in the amount of ions that are introduced into the ion trap.