169results about How to "Precise resection" patented technology

A surgical assistance system for operating on biological tissue using a surgical tool attached to an arm of an automatically-controlled surgical instrument so that an optimal feed rate of the tool is calculated and outputted to the surgical instrument, the system including: a device for storing and voxelizing medical image data obtained from a biological tissue subject to surgery; a device for setting an operative location based on the shape of the biological tissue; a device for calculating a tool path along which the tool travels to perform surgery at an operative location; a device for determining the region of interference between the tool and the voxels; a device for determining the hardness of the biological tissue in the interference region; a device for calculating an optimal tool feed rate corresponding to the hardness; and a device for outputting the feed rate obtained by the calculations to the surgical instrument.

The invention discloses a three-dimensional structural description method of hepatic vascular system, which belongs to the field of medical liver division. The method comprises the following steps of: firstly, dividing a hepatic image and a hepatic vascular image, structurally analyzing the hepatic vascular three-dimensional image, skeletonizing the liver and the blood vessel, and marking the skeletonized voxel points; next, storing the marked voxel points to data structure of multi-branch tree; then, distinguishing main and branch blood vessels according to master slave relation of the voxelpoints in the multi-branch tree; finally, dividing the liver body into multiple liver segments according to relation between the blood vessels in the hepatic vascular system. By the three-dimensionalstructural description method of hepatic vascular system, accurate division of liver is realized so that guidance is provided for accurate removal of liver.

Provided is a fault identification and protection method of an electrified railway AT traction network. When network voltage is lower than a specified value, labeling no-load trend symbol values of the near ends and the far ends of a touch net T and a negative feeder F in each self-coupling segment with 0, labeling influent trend symbol values with 1, labeling effluent trend symbol values with -1, if an absolute value of a sum of the trend symbol values of two ends of the touch net T in each self-coupling segment is larger than or equal to 1, or a failure absolute value of a sum of the trend symbol values of two ends of the negative feeder F is larger than or equal to 1, or a failure absolute value of a sum of the trend symbol values of two ends of a touch net T branch and a negative feeder F branch is larger than or equal to 1, respectively judging the touch net T to be in short circuit failure to the ground, or the negative feeder F to be in short circuit failure to the ground, or the touch net T to be in short circuit failure to the negative feeder F, and breaking off all breakers at two ends of each self-coupling segment. Short-circuit reactance calculated according to corresponding voltage and short-circuit current at two ends of each self-coupling segment and the corresponding length of the self-coupling segment determine failure positions.

The invention discloses a method for protecting a low-voltage bus of an intelligent substation. The method is achieved through a bus protection device and branch protection measuring and control devices connected with the bus protection device in a cooperation mode, the bus protection device is started through steady current overflowing elements and current variable quantity elements of the active branch protection measuring and control devices, action allowing signals are sent to the bus protection device through power direction elements or the current overflowing elements of branches, and bus composite voltage blocking elements are adopted as the open condition of a bus fault. Internal and external faults of a bus region are judged by the bus protection device in the mode of combining starting signals and the action allowing signals, when the three conditions are met at the same time, the bus fault is judged, the bus protection device acts to remove the faulted bus, and a fault of a segmentation dead region and a fault of a transformer low-voltage side dead region can be judged and isolated. The bus faults with voltage classes of 35 kV and below can be removed fast and accurately, and the method can be directly applied to a digital substation or the intelligent substation.

The invention relates to a novel lung tumor locating needle. The novel lung tumor locating needle comprises a puncture needle, anchoring locating needles, a locating line and a pushing device, wherein the puncture needle is composed of a puncture needle cannula and a puncture needle handle, the pushing device comprises a pushing tube and a pushing tube handle, the pushing tube is arranged in the puncture needle cannula, the far end of the pushing tube abuts against the near ends of the anchoring locating needles, the width of the near ends of the anchoring locating needles is larger than or equal to the outer diameter of the pushing tube, the far end of the locating line is connected with the near ends of the anchoring locating needles, the locating line extends out of the exterior of the pushing device from the interior of a tube cavity of the pushing tube, the far end of the locating line is provided with multiple colored bands with different colors, and the length of each colored band ranges from 3 mm to 15 mm. According to the novel lung tumor locating needle, the functions of determining lesion localization and measuring the depths of lesions are achieved simultaneously, the lung or parts of the lung can be lifted up, excision of the lesions is convenient for a surgeon, and the depths of the lesions can be measured during an operation.

The invention relates to a conjugated carbon-iodine polymer, preparation thereof and application of the conjugated carbon-iodine polymer in preparation of a positioning marker, and belongs to the technical field of imaging markers. According to the brand-new imaging marker based on the conjugated carbon-iodine polymer disclosed by the invention, due to the conjugated structure, the polymer has very strong absorption in a visible light region, and the iodine content up to 84.1% corresponds to the superstrong imaging capability of the polymer. In the tumor operation process, based on double guidance of polymer image marking and naked eye observation, the marking can better assist in determining the cutting edge of the tumor, so that accurate cutting of the tumor is achieved, and damage to surrounding normal tissue is reduced as much as possible. In the tumor cyber knife treatment process, the polymer can replace a clinical gold mark to provide ray marking guidance, the ray imaging quality and more accurate radiation dose distribution are improved due to no metal artifacts, the relative stability of the marking position is improved due to good biocompatibility, and the radiotherapy side effect can be further reduced.

The invention provides a fluorescence contrast agent. The fluorescence contrast agent comprises gold nanoclusters, antibodies of tumor specificity markers and coomassie brilliant blue, wherein the gold nanoclusters and the antibodies of the tumor specificity markers are connected in a click-chemistry mode; and the coomassie brilliant blue is combined with the gold nanoclusters connected with the antibodies of the tumor specificity markers. The fluorescence contrast agent provided by the invention has the characteristic of naked-eye visualization. In addition, the invention also provides a preparation method of the fluorescence contrast agent; and the method is simple in step and is suitable for industrial production.

The invention discloses a tumor-targeting GRP analogue and application thereof. The GRP analogue is selected from any of linear polypeptide Gln-5-Htp-beta-Ala-Nva-Gly-His-NH2, annular polypeptide Lys-Cys-Gln-5-Htp-beta-Ala-Nva-Gly-His-CysHis-Gly-Nva-beta-Ala-5-Htp-Gln-NH2 and the like. High-affinity polypeptides can be specifically combined with various tumor cells, and this high-affinity characteristic can be used for optical imaging and nuclear medicine imaging of malignant tumor. The high-affinity polypeptides when being coupled with fluorescent dye can serve as a tumor specific-targeting molecular probe, the tumor-targeting GRP analogue is expected to realize effect of accurately positioning tumor boundary, can bring about instantaneity for preoperative and intraoperative image navigation and has the advantage of improving operative accuracy.

A garlic root cutter with cutting area controllable relates to the field of deep-processing mechanical equipment for vegetable rootstock cutting. A fixing plate, a cutting area opening control plate, three bucket-shaped plates distributed in the peripheral direction at intervals of 60 degrees, an elastic blade, a lifting hopper, a feeding barrel, an elastic plastic guide wheel and the like form a critical portion. Pin shafts on the inner sides of the bucket-shaped plates are fixed on the fixing plate, and pin shafts on the outer sides of the bucket-shaped plates are arranged on a groove of the control plate. The blade is fixed on a knife shaft, matched with the opening control plate and the like in use and controlled by a motor. The range the a rotary knife can cut can be controlled according to sizes of garlic roots so that garlic skins or garlic cloves can be prevented from being damaged, and reliable garlic head positioning and feeding can be achieved. An elastic ejecting device below a feeding mechanism can lead garlic heads to be reliably positioned and clamped and accurately cut, continuous feeding, root cutting, bagging and other technological processes of the garlic heads can be achieved through an automatic line, and production efficiency is high.

The invention discloses a trip system of a total residual current operated protector of a distribution area and an application method thereof. The system comprises: an intelligent distribution terminal, which is in bidirectional connection with a master station through a remote communication network; a plurality of collectors; a trunk line; a branch line; protectors, which are arranged on the trunk line and the branch line, wherein the plurality of collectors are in series connection with the protectors. The collectors are connected with the intelligent distribution terminal through a local communication network. And a user terminal is connected with an end of the branch line. According to a technical scheme provided in the invention, the electric power maintainer can have clear purposiveness and pertinency and all branch lines can be cut off accurately, so that a problem that a general protector can not be closed can be solved; meanwhile, a switching frequency of the general protector can be substantially reduced; the number of inconvenience for a normal life of a user can be reduced; and occurrences of mechanical or electrical faults in the protector can be avoided; therefore, security of a power grid can be improved.

The embodiment of the invention discloses an urgent and accurate control method and system of a large-scale interruptible load. The urgent and accurate control method of the large-scale interruptibleload comprises the steps that an area control master station obtains a load capacity cutting sequence table; the area control master station obtains a first load capacity to be cut; the area control master station performs minimum undercut matching according to the first load capacity to be cut, and cuts off a successfully matching load cutting corresponding to control substations; if a second load capacity to be cut exists, the area control master station sends the second load capacity to be cut to the corresponding control substations for load cutting processing. According to the urgent andaccurate control system of the large-scale interruptible load, large-scale dispersive and interruptible load station connection is met, minimum undercut matching is carried out layer by layer, accurate and rapid cutting of the interruptible load according to priority ranking is realized, and the problem of large-area outage loss due to the fact that a large amount of interruptible loads and non-interruptible loads on cut circuits cannot accurately distinguished and the unbalanced capacity is larger after measures are executed is solved.

The present invention relates to a substation area backup protection method used for simplifying transformer in-place backup protection. The conventional transformer backup protection has the difficulties of complex configuration, difficult setting and cooperation, long action delay, and poor sensitivity. The substation area backup protection method is characterized in that distance protection with forward/reverse direction acting characteristics can be configured for a breaker at each side of a transformer, impedance constant values are set according to sensitivity requirement achieving respective function, and selectivity is achieved through fixed time constant values; after that, a substation area backup protection criterion having fault tolerance is constructed according to switching quantity information within the range of the substation, so as to achieve judgment for fault components and decision for breaker tripping, thereby accelerating fault clearing within the substation. The substation area backup protection method reduces setting difficulty of transformer in-place backup protection, and achieves coordination and unification among action selectivity, quickness, sensitivity and reliability of backup protection when a fault occurs on substation equipment.

The invention discloses tumor targeting polypeptides and application thereof. A series of high-affinity polypeptides can be specifically combined with various tumor cells, and can be used for opticalimaging and nuclear medicine imaging of malignant tumors by utilizing the high-affinity characteristic. High-affinity polypeptide coupled fluorescent dyes can be used as tumor specific targeting molecular probes, are expected to achieve the effect of accurately positioning the tumor boundary, can bring real-time performance for preoperative and intraoperative image navigation, and have the advantage of improving the operation accuracy. The series of polypeptides can also be coupled with radionuclide to detect malignant tumors in vivo in real time so as to achieve the purpose of disease diagnosis or treatment.

The invention discloses a full spiral lamp tube cutter and a full spiral lamp tube cutting process. The full spiral lamp tube cutter comprises a multi-station machine, wherein the machine is provided with a plurality of station heads which are intermittently operated on the stations, and each station head is provided with a clamp for fixing and positioning a full spiral lamp tube. The invention is characterized in that the clamp is rotatably arranged on the station head by using the axial line of the full spiral lamp tube as the rotation axis; the station head is provided with a clamp rotating device and a control device for controlling the rotation angle of the rotating device and coordinating the rotation angle of the rotating device and the intermittent movement of the station head; and at least one group of a workpiece chucking station, a coarse cutting station, a first fine cutting stations, a second fine cutting station and a tube lowering station are sequentially arranged in the station head operating direction, and the coarse cutting station, the first fine cutting stations and the second fine cutting station are used for cutting pins. By arranging the clamp rotating device, the coarse cutting station, the two fine cutting stations for cutting pins and the control device for coordinating the operation of all the components on the machine, the invention can automatically and accurately cut the pins of the full spiral lamp.

The invention relates to an adaptive variable load anti-islanding method for a distributed type photovoltaic power supply. In the method, an adaptive anti-islanding device is adopted. The method comprises the following steps: performing initialization; calculating an impedance angle phi, and adaptively adjusting the impedance angle to enable the impedance angle to be separated from an island non-detection zone; detecting the island, and cutting off the island. On the basis of acquiring all parameters of the distributed type photovoltaic power supply, the adaptive variable load anti-islanding method can be used for exquisitely judging whether the distributed type photovoltaic power supply generates the island and quickly enabling an inverter to operate after the island formation is determined so as to precisely cut off the island; the whole method is small in dead zone, high in precision, high in practicability, simple and feasible.

The invention relates to a metal recovery device, in particular to a stainless steel metal recovery device. The technical problem to be solved by device is to provide a stainless steel metal recoverydevice. The stainless steel metal recovery device comprises a bottom connecting frame, an operation control screen, supporting bottom feet, a top connecting frame, a middle top fixing frame, a handledisassembling mechanism, a bottom face cutting mechanism, a curled edge removing mechanism and a curled sheet separating mechanism; the operation control screen is arranged at the middle-lower part ofthe left end of the bottom connecting frame; the left side of the bottom end of the bottom connecting frame is connected with supporting bottom feet; the right side of the top of the bottom connecting frame is connected with the top connecting frame; and the handle disassembling mechanism is arranged on the left side in the bottom connecting frame. According to the device, the effects of disassembling and separating the handle and the stainless steel cylinder body at a high speed, accurately cutting off the bottom panel of the wrinkled cylinder body, finally efficiently cutting off the curlededge of the stainless steel rice cylinder and cutting and compacting the curled edge into a plate to obtain a stainless steel recycled plate are achieved.

The invention relates to the field of medical treatment, and discloses a method for preparing a cutting guide plate used for determining the size of a substitutional flap on the surface of the soft tissue by utilizing digital space reconstruction and 3D printing. The method comprises the following steps: (1) carrying out CT scanning, thus thin-layer CT data of a patient is obtained, the soft tissue model state and tumor state of a disease area are reconstructed, and editable three-dimensional model data is obtained; (2) editing the three-dimensional model, planning a repairing scheme, calibrating the safe cutting boundary of the focus tissue, determining the focus area to be cut, extracting a repairing curved surface, and calculating a curved surface needed by conversion; (3) converting the curved surface to a plane through calculation, and carrying out thickening treatment on the plane, thus obtaining a three-dimensional plate model; and (4) carrying out 3D printing, thus preparing the cutting guide plate. With the prepared cutting guide plate provided by the invention, the substitutional flap can be accurately cut from a donor site, and thus the purpose that the most accurate conformal functional reconstruction of a recipient site is obtained with the minimum injuries of the flap donor site is realized.

The invention discloses an adjustable scalpel head for minimally invasive soft tissue central biopsy. The scalpel head comprises a shell, one end of the shell is provided with a scalpel tip for puncture, a negative pressure cutting device for cutting human body tissues is arranged in the shell, and a driving device for driving the negative pressure cutting device to cut the tissues is arranged in the shell. The prism-shaped front end of the scalpel tip transits backwards into a cone shape.

The invention discloses a local rapid isolation implementation method, and the method comprises the steps that a first intelligent device enables an optical fiber to serve as a channel so as to transmit a current to a second intelligent device; the first intelligent device is connected with the second intelligent device through an optical fiber; the first intelligent device calculates the value of the current in the channel through employing a full-wave Fourier algorithm, enables the value of the current to serve as a side collection value and transmits the side collection value to the second intelligent device through employing an optical fiber; the second intelligent device receives the transmitted current, and enables the value of the collected current to serve as a local collection value; the second intelligent device receives the side collection value, calculates and obtains a differential current through employing the side collection value and the local collection value, and judges whether a protection segment region of the first intelligent device has a fault or not according to the differential current: the second intelligent device executes optical difference protection action to get rid of the fault if the protection segment region of the first intelligent device has the fault, so as to isolate the fault. The method achieves the fast and accurate discrimination of the fault, quickly cuts off and isolates the fault, reduces the maintenance time, and achieves the recovery of power supply as quickly as possible.

The invention provides a molding method for a thin-wall plastic product. The molding method comprises the following steps: injection molding of the thin-wall product, wherein a side gate type glue feeding point is used for feeding glue, the glue feeding point is a single glue feeding point, the glue feeding point is arranged inside a functional hole of the product, and a melt inside the functional hole of the thin-wall product forms a glue feeding position integrally with the thin-wall product after melt injection; and cutting of the glue feeding point, wherein the molded thin-wall product is fixedly arranged on a positioning jig; the glue feeding position inside the functional hole is removed by using a numerically-controlled machine tool. The molding method provided by the invention is convenient in sufficient glue-flowing and filling of the melt; weld marks generated on the surface of the product due to arrangement of the plurality of glue feeding points can be removed; the pressure of the injection molding can be prevented from being too large; meanwhile, the waste of materials and the design difficulty of the die can be reduced; the cost is reduced. Furthermore, a cutter controlled by the numerically-controlled machine tool can be used for cutting the glue feeding position positioned on the positioning jig from the functional hole rapidly and accurately, so that a qualified product can be obtained.

The invention provides a plasma surgical electrode realizing bendable direction change of the head. The plasma surgical electrode comprises a point electrode, an electrode holder, an outer cutter bar,an outer jacket, an inner cutter bar, an inner jacket, a suction opening and a handle, wherein a pull wire mechanism is arranged in the handle, the pull wire mechanism is connected with the outer cutter bar through a first pull wire and a second pull wire, a bendable structure is arranged at the front end of the outer cutter bar, the inner cutter bar is arranged in the outer cutter bar, a bendable structure is arranged at the front end of the inner cutter bar, the point electrode is arranged at the front section of the inner cutter bar, the suction opening is arranged in the point electrode,the inner cutter bar is of a hollow structure, and the front end of the inner cutter bar communicates with the suction opening of the point electrode, so that a suction flushing channel is formed. Theplasma surgical electrode realizing bendable direction change of the head has the advantages that omnibearing excision can be carried out aiming at the different positions and structures of the lesion parts of patients, the accuracy and effect of the surgery can be guaranteed, the surgery products can be discharged from nearby positions, the surgery precision can be improved, and the surgery timecan be reduced.

The invention relates to a decorative joint filling device for decoration and a using method thereof. The decorative joint filling device comprises a bottom plate, a driving motor and an electric pushing rod, wherein the bottom plate is provided with a circular ring, the driving motor, a hollow drum, the electric pushing rod, a mounting cylinder and a push handle; the circular ring is provided with an air filtration structure; the air filtration structure is provided with a hose; the hose is connected to the hollow drum; the hollow drum is provided with a rotating shaft, fan blades and an airinlet pipe; the right end of the air inlet pipe is arranged at the bottom of the bottom plate; the driving motor is connected to the rotating shaft; the rotating shaft is provided with a driving beltpulley; the driving belt pulley is provided with a belt; the belt is provided with a driven belt pulley; the driven belt pulley is provided with a rotating rod; the rotating rods are provided with a cutting disk and a rotating disk; the rotating disk is provided with bristles; the rotating disk is provided with a dust pushing structure; the dust pushing structure is provided with a dust accumulation structure; the mounting cylinder is provided with a decorative joint filler cylinder; the electric pushing rod is provided with an L-shaped pressing rod; the bottom plate is provided with a straight rod; and the straight rod is provided with a pressing ball. The decorative joint filling device for decoration and the using method thereof have the advantages of realizing the cleanliness in cut joints, avoiding the influence of dust in the cut joints on decorative joint filler, improving the bonding effect of the decorative joint filler and tiles, and ensuring the integrity of decorative jointfilling.