30results about How to "Precise resection" patented technology

The invention discloses a high-efficiency near-infrared two-region aggregation-induced emission material, a preparation method thereof and application of the high-efficiency near-infrared two-region aggregation-induced emission material in bimodal surgical navigation. According to the molecular structure, the organic near-infrared two-region material with an intramolecular charge transfer characteristic is constructed by taking thionaphthalene tetracarboxylic acid diimide as an electron acceptor group and tetraphenylethylene as a molecular rotor and an electron donor unit. By expanding the length of a pi conjugate fragment and introducing an isotope effect, the oscillator strength can be improved, and high-frequency vibration can be inhibited, so that the radiative transition rate of molecules is promoted, and the non-radiative transition rate is inhibited. The nanoparticles prepared from the aggregation-induced emission material have the advantages of high brightness, large Stokes shift and good light stability, and have an excellent effect in bimodal imaging guided mouse in-situ breast cancer and sentinel lymph node operation excision.

The invention discloses a fault upstream and downstream judgment method based on an instantaneous symmetric component method. The fault upstream and downstream judgment method comprises the following steps: S1, monitoring current data of each node of a power distribution network in real time; s2, calculating an instantaneous positive sequence current and an instantaneous negative sequence current of the real-time data by adopting an improved instantaneous symmetric component method; s3, performing primary difference on the instantaneous positive-sequence current and the instantaneous negative-sequence current respectively; s4, comparing the primary differential value of the instantaneous negative-sequence current with a set threshold value, and judging whether the directions of the instantaneous positive-sequence current and the instantaneous negative-sequence current are the same or not; and S5, performing fault section judgment by combining the direction of the instantaneous positive and negative sequence current and the topological structure of the power distribution network. The improved instantaneous symmetric component method is used to obtain the instantaneous positive-sequence current and the instantaneous negative-sequence current, the directions of the instantaneous positive-sequence current and the instantaneous negative-sequence current are analyzed, the fault section can be quickly and accurately positioned, and the cost is reduced.

The utility model provides an auxiliary positioning lighting device for a jaw osteomyelitis operation, belongs to the technical field of jaw osteomyelitis operation equipment, and solves the technical problems that a doctor needs to spend a long time in judging the position and boundary of a jaw osteomyelitis focus in the operation process, the operation view is not clear, lighting is difficult and the like. The device comprises a positioning guide plate, the positioning guide plate comprises a tooth socket and a wound covering plate, a connecting plate is integrally formed between the tooth socket and the wound covering plate, a sliding groove is formed in the rear end of the connecting plate, a sliding block is connected in the sliding groove in a sliding mode, a bolt is fixed to the upper position of the rear end of the sliding block, and a long groove used for sliding of the bolt is formed in the connecting plate. A connecting mechanism is arranged at the lower position of the rear end of the sliding block, and a supporting mechanism is arranged on the connecting mechanism. The device has the advantages that the nidus of jaw osteomyelitis is positioned in real time, illumination of the operation field is kept, illumination does not need to be continuously adjusted after the position of the head of a patient is adjusted in the operation process, operation wounds are reduced, operation efficiency is improved, and the like.

The utility model provides a simple pulmonary nodule positioning device for assisting endoscopic surgery, which comprises a positioning mechanism marked with scales, and a bipolar electrocoagulation device which can be matched with the positioning mechanism and is used for accurately positioning pulmonary nodules in the auxiliary endoscopic surgery is fixed on the positioning mechanism. And the bipolar electrocoagulation device is connected with a high-frequency generator with a control button. The simple pulmonary nodule positioning device used for assisting the endoscopic surgery is simple in structure and convenient to operate, can accurately position ground glass nodules in the lung by combining an expansion-collapse method, can improve the positioning accuracy of the pulmonary nodules in the surgery, achieves the purpose of accurately excising the pulmonary nodules, reduces excision of lung tissues while ensuring that the incisal margins are negative, and improves the operation efficiency. More lung functions are reserved, so that the operation effect is improved.

The invention belongs to the technical field of medical instruments, and particularly relates to an atherosclerosis resection device which comprises a puncture cannula, a shell is in threaded connection with the interior of the puncture cannula, a connecting pipe A is fixedly connected to one end of the shell, and a hole fixedly connected with the cannula is formed in the outer surface of the connecting pipe A; the interior of the sleeve is in threaded connection with a collecting component, and one end of the connecting pipe A is fixedly connected with a connecting pipe B; by means of the collecting component arranged in cooperation with the structure, after the artery plaque is cut up, the artery plaque needs to be removed from the blood vessel, after being removed, the artery plaque is placed in the collecting component, and assemblies in the collecting component can filter the artery plaque and conduct dry-wet separation; the separated artery plaque can be subjected to more detailed pathological and biochemical analysis, composition and characteristics of the plaque can be known, and damage to surrounding tissues in the operation process can be reduced by grinding the plaque and collecting the plaque in a sealed mode.

The invention discloses an automatic green brick mark cutting device and method for a continuous roller press, and the device comprises a continuous roller press body which is provided with a feeding end and a discharging end; the conveying device is mounted behind the discharging end; the green brick cutting machine is arranged on the conveying device; the green brick length measuring sensor is arranged on the conveying device; the controller is electrically connected with the continuous roller press body, the conveying device, the green brick cutting machine and the green brick length measuring sensor, data fed back by the sensor is received through the controller, position parameters of the green bricks needing to be cut are automatically calculated, and therefore the green brick cutting machine is driven to conduct accurate cutting. The uncertainty of manual processing is avoided, and the accuracy and efficiency are improved; due to the fact that the device can only cut off the green bricks with the marks instead of the whole green bricks, material loss can be reduced to a certain degree, and production cost is reduced. Manual intervention is reduced through automatic operation, the production efficiency is improved, and the production line can operate more stably and efficiently.

The invention discloses a redundant part shaping and cutting device for a motor stator coil winding, and relates to the technical field of motor production equipment.The redundant part shaping and cutting device comprises a frame body, the frame body further comprises a base, a supporting frame is fixedly installed at the top of the base, and a guide rail is fixedly installed at the top of the base; the device comprises a base, an opening and closing cutting mechanism is fixedly installed on the top of the base, a fixing mechanism is fixedly installed on the outer side face of the opening and closing cutting mechanism, the fixing mechanism is slidably installed above a guide rail, and an extrusion mechanism is fixedly installed on the top of a supporting frame and arranged over the opening and closing cutting mechanism. The redundant part shaping and cutting-off device for the motor stator coil winding can accurately and efficiently complete cutting-off work of the redundant part, it is ensured that the length of each winding meets the standard requirement, and the production quality and efficiency of a motor are improved.

The invention discloses equipment and a method for preparing a PCR (Polymerase Chain Reaction) composite membrane, and relates to the technical field of material membrane preparation. Comprising a casting machine used for preparing the PCR composite membrane, the casting machine comprises a conveying assembly used for conveying fluid PCR composite membrane raw materials, a material adding assembly installed at one end of the top of the conveying assembly and used for adding the fluid PCR composite membrane raw materials, and a processing assembly installed at the middle end of the top of the conveying assembly and used for processing the fluid PCR composite membrane raw materials. And the separating assembly is used for enabling the fluid PCR composite membrane raw materials on the top surface of the transmission assembly to form a membrane shape and separating the PCR composite membrane into two parts based on the in-membrane state. By means of uniform heating of the fluid heater, gas in raw materials is effectively released, bubbles in a membrane body are prevented, the uniformity and stability of a membrane-shaped product are ensured, in addition, the PCR composite membrane can be intelligently separated into two parts through the processing assembly, and convenience is provided for subsequent winding work.

The application relates to an abnormal function module cutting method, system, device and controller. The method comprises the following steps: acquiring the operation parameters of each function module in a converter valve; the operation parameters are used for representing the operation state of the function module; judging whether the function module is normally operated according to the operation parameters of the function module; in the case that the function module is abnormally operated, controlling a trigger switch to be turned on, and in the case that the trigger switch is turned on, controlling a bypass switch to be turned on; wherein the first end of the bypass switch is used for connecting the first end of the function module, the second end of the bypass switch is used for connecting the second end of the function module; the first end of the trigger switch is used for connecting the first end of the function module, and the second end of the trigger switch is used for connecting the second end of the function module. By adopting the method, the main circuit in the function module can be quickly and accurately cut off in the case that the function module in the converter valve is abnormal, so that the normal operation of other function modules in the converter valve is ensured.

The invention discloses smoked film impurity removing equipment based on a visual technology, and relates to the field of rubber processing. The smoked film impurity removing equipment comprises a rack, a three-axis movement mechanism, a lamp box adsorption mechanism, a visual recognition system and a roller device. A deck plate is arranged at the top of the rack, and a three-axis movement mechanism is installed on the upper portion of the deck plate. A floating cutting mechanism is installed on the Z-axis module sliding block. A roller device is installed on a connecting plate on the Y-axis sliding block, and the pressure of the roller device can be adjusted through a spring and an adjusting screw. And the middle part of the countertop is hollow and is embedded with a lamp box adsorption mechanism. Smooth fixing and light-transmitting illumination of the rubber sheet are achieved, the positions of impurities are accurately recognized in combination with a visual system, and the rotary cutting head is driven by a three-axis system to complete impurity cutting. According to the floating cutting mechanism, damping and buffering of the cutting head are achieved through the floating clamping base, the clamping clamping base and a rubber gasket between the floating clamping base and the clamping clamping base, rigid contact between the main shaft and the working panel is avoided, rising of the X axis and the Z axis is restrained, and the working panel is protected. And the lamp box adsorption mechanism forms partitioned negative pressure adsorption on the film and can effectively highlight impurities, so that the quality and the efficiency are improved.

The application discloses a kind of transmission line mutual inductance synchronous sampling intelligent filter monitoring method and system, it is related to transmission line state monitoring technical field, the application is by synchronous acquisition line three-phase voltage and current and mutual inductor temperature gradient and leakage flux density, into heat magnetic coupling transfer function generation phase shift distribution sequence, and accordingly execute fractional order delay interpolation resampling generation phase correction matrix;It is reconstructed into phase space evolution trajectory by delay coordinate mapping, according to node neighborhood manifold curvature cut-off random wideband noise, retain core attractor manifold;And it is converted into topological relationship diagram, calculates geodesic distance and state transition probability distribution connected edge weight, executes graph Laplace smoothing processing and generates synchronous measurement electric signal after reverse projection;Extract transient distortion feature vector and calculate its and historical benchmark set Mahalanobis distance generation electrical state deviation degree, when electrical state deviation degree is out of limit, generate abnormal early warning instruction, guarantee the accuracy of micro-fault monitoring.

This utility model belongs to the field of casting post-processing technology, and in particular relates to a casting riser removal device. The device includes an indexing drive device, a turntable bearing, a turntable, and a clamping device. The indexing drive device drives the turntable to rotate intermittently at a preset angle. The turntable has several rectangular through holes along its circumference, and the inner wall of the rectangular through holes has a mounting groove. The clamping device includes a support plate, a positioning column, and an arc-shaped positioning plate. The positioning column is inserted into the bottom countersunk hole of the casting to achieve radial positioning, and the arc-shaped positioning plate fits against the arc-shaped surface of the casting to achieve circumferential positioning. A cross rail locking assembly is provided in the dovetail groove, and the casting is quickly and automatically clamped through the first driving inclined surface and the return spring. This device can effectively clamp small pump body castings with irregular shapes for riser and gate removal, solving the problems of low production efficiency, complex clamping operation, and low equipment utilization of traditional single-station removal methods. It realizes multi-process parallel operation, improving production efficiency and removal accuracy.

The invention relates to the technical field of granulators, and discloses a granulator for preparing EPDM (Ethylene-Propylene-Diene Monomer) granules, the granulator for preparing EPDM granules comprises a screw extruder, a mold, a cooling pond and a granulator which are connected in sequence, and a plurality of conveying mechanisms and a control mechanism are arranged on the cooling pond; the conveying mechanism comprises two locking assemblies, two conveying wheels and two displacement monitoring assemblies which are symmetrically arranged on the cooling pool; after an EPDM wire material is generated through the screw extruder and the mold, the EPDM wire material enters the position between the pair of conveying wheels, and after the two conveying wheels are locked through the two locking assemblies, the two conveying wheels are driven by the control mechanism to carry the EPDM wire material to be conveyed to the granulator so as to prepare EPDM particles. According to the pelletizer for preparing the EPDM particles, EPDM wire materials can be laid, guided and continuously conveyed through automatic locking and unlocking of the conveying wheels, common strip breaking working conditions are intelligently coped, strip breaking areas are cleared away in time, and the product quality is guaranteed.

The utility model discloses photovoltaic panel adhesive tape removing equipment which comprises a base, and two clamping roller assemblies are symmetrically arranged on the front side and the rear side of the upper portion of the base. A portal frame is arranged between the two clamping roller assemblies, the bottoms of the two ends of the portal frame are fixed to the base, two mounting plates are symmetrically arranged on the left side and the right side of the portal frame, the two mounting plates are slidably arranged on the portal frame, an air cylinder is fixedly arranged on each mounting plate, and piston rods of the air cylinders penetrate through the corresponding mounting plates to be arranged downwards. A rotating motor is fixedly arranged at the front end of a piston rod of each air cylinder, and a milling cutter is fixedly arranged on an output shaft of each rotating motor; an electric control cabinet is arranged below the base, and the servo motor, the air cylinder and the rotating motor are electrically connected with the electric control cabinet. The rubber strip processing device is simple in structure, low in cost, suitable for rubber strip processing in waste solar photovoltaic panel recycling, and high in processing efficiency due to the fact that the two milling cutters are adopted for repeatedly cleaning the rubber strips.

The invention discloses a multi-modal forgetting learning method based on attribute-level knowledge decoupling, and aims to solve the balance problem of low reliability (Reliability, core feature deletion by mistake) and poor locality (Locality, influence on irrelevant samples) caused by sample-level decoupling when a multi-modal pre-training model executes a forgetting task. The core of the method is that atomized attribute-level knowledge is identified through causal analysis, and the atomized attribute-level knowledge is decoupled into modal specific attributes and modal consistent attributes for refined editing. The method mainly comprises the following steps: firstly, inferring modal specific attributes and modal consistent attributes from an incomplete observation sample by using a multi-modal variational reasoning (MVI) module; secondly, effective forgetting is realized by cutting off a causal path between a specific modal attribute and a prediction result by utilizing a comparative semantic editing module, and meanwhile, modal consistency characteristics are reserved to maintain the reliability of the model; thirdly, constructing a multi-modal sample pair as a semantic anchor point, and accurately moving a decision boundary of the forgetting attribute under a comparative learning framework; and finally, model updating is carried out through joint optimization of a loss function, and the cross-modal understanding capability of the model is reserved to the maximum extent while the target privacy is ensured to be erased thoroughly. According to the method, the robustness and generalization efficiency of the multi-modal model in a privacy and copyright protection scene are remarkably improved.

The utility model discloses a circumcision ribbon, which solves the problems in the prior art that cold light generated by a cold light source cannot irradiate a prepuce cavity and the wandering amplitude of a prepuce is large after the prepuce is fixed, and comprises an absorbable suture sewn on a prepuce wound and an inner ring sleeved on a coronary sulcus of a penis, the irradiation assembly is arranged in the inner ring, connected with the cold light source and used for irradiating the foreskin cavity, the fixing binding belt is arranged on the inner ring in a sleeving mode and used for fixing the circumcision part by a circle, and the elastic line is arranged on the inner ring in a sleeving mode and used for stopping bleeding of the circumcision part. The irradiation assembly transmits cold light emitted by the cold light source into the inner ring so as to irradiate the interior of a prepuce cavity, the prepuce is fixed to the inner ring through the elastic line or the fixing binding belt, displacement of the prepuce in the circumcision operation can be avoided, the elastic line can stop bleeding of a prepuce wound, and the prepuce is prevented from being damaged. Therefore, the circumcision wound can be sutured and fixed conveniently, and the operation efficiency is improved.

The side hanging type carrot harvester comprises a hanging frame, a mounting plate is fixedly mounted on the side face of the upper end of the hanging frame, supporting wheels are rotationally mounted on the side faces of the two ends of the lower side of the hanging frame, and a lug plate at the bottom of the upper end of the hanging frame is rotationally connected with lug plates at the tops of one ends of two conveying mechanisms; a lug plate at the bottom of the middle of the hanging frame is rotationally connected with one end of a hydraulic cylinder, and the other end of the hydraulic cylinder is rotationally connected with lug plates at the tops of the other ends of the two conveying mechanisms. According to the side hanging type carrot harvester, resistance to carrot seedling leaves during seedling arranging can be effectively reduced, and therefore the seedling leaves are prevented from being pulled apart in the harvesting process; the seedling cutting device has the advantages that the seedling cutting position can be adjusted according to the height of the carrots, seedling leaves on the carrots can be accurately cut off, the seedling leaves can be thoroughly cut off, follow-up retreatment of the seedling leaves is avoided, cost is reduced, and the quality of the harvested carrots is improved.

The utility model relates to the technical field of tobacco processing, and discloses an eggplant coat and eggplant leaf stemming device which comprises a stemming table, a cutting assembly is arranged on the stemming table, and a front side support and a rear side support are arranged on the front side and the rear side of the stemming table respectively. Transmission rollers and supporting rollers are rotationally installed in the front side support and the rear side support, a plurality of sets of transmission belts are installed between the two sets of transmission rollers which are symmetrical front and back in a transmission mode, and the lower side faces of the transmission belts are attached to the top face of the stem removing table. The servo motor controls the driving shaft to push left and right or rotate up and down, so that the driving shaft drives the cutter support to move left and right in a small range and rotate up and down in a small range, the eggplant leaves are conveyed to the positions of the corresponding cutter wheels along the top face of the peduncle removing table, and the two sets of cutter wheels corresponding up and down cut the eggplant leaves with stems on the eggplant leaves as paths during rotation. And the effect of accurately cutting off the eggplant stems on the eggplant leaves is achieved.

The invention discloses a CXCR4 targeted polypeptide as well as a preparation method and application thereof. The amino acid sequence of the CXCR4 targeted polypeptide is shown as SEQ ID NO. 1. A series of polypeptides targeting chemokine receptor 4 (CXCR4) are designed and synthesized, and the affinity of the found polypeptides and CXCR4 protein is determined through SPR (Surface Plasmon Resonance). The polypeptide disclosed by the invention can be specifically combined with various tumor cells, preferably melanoma, lymphoma, breast cancer, lung cancer, colorectal cancer, brain glioma, prostatic cancer and the like. The invention also relates to a method for preparing said polypeptide; the polypeptide is directly coupled with fluorescent dye or radionuclide or coupled with fluorescent dye or radionuclide through a ligand, so that the purpose of treating or diagnosing tumors is achieved.

The application discloses a kind of electric leakage protection device and rail transit power supply system, the device includes: multiple sets of electric leakage protection sub-device, it is set up one-to-one with the multiple traction substations of rail transit power supply system, it includes: ground leakage protection circuit, digital current selective trip protection circuit and switch, digital current selective trip protection circuit is connected with the corresponding switch by tail cable communication, and it is electrically connected with the corresponding ground leakage protection circuit by hard wire, for when receiving the electric leakage warning signal sent by corresponding ground leakage protection circuit, obtain and locate fault interval according to the current vector of all feeder loop inflow, outflow of the power supply interval to which itself belongs, and after positioning, remove fault interval. The switch between the two adjacent traction substations is connected by optical cable communication. Thus, the device can quickly and accurately remove the fault interval, reduce the power outage range, guide the maintenance personnel to carry out targeted maintenance, and maintain the continuity and stability of the power supply system.

The invention discloses a power distribution network fault section positioning method and system considering distributed power supply access, and the method comprises the steps: 1), measuring a negative-sequence component at a local distributed energy source, and carrying out the judgment of fault starting according to the break variable of the negative-sequence component; if yes, calibrating fault zero time, and intercepting data of a cycle; 2) calculating the transient voltage of a node n based on the transient voltage and current data measured by the home terminal; calculating the transient voltage of a node n + 1 based on the transient voltage and current data measured at the opposite end; 3) traversing transient voltages of all nodes in the calculation interval, and calculating a transient voltage difference value of two adjacent nodes; and 4) judging a fault section according to the transient voltage difference value, and when the fault section is obtained, respectively switching off adjacent switches of the fault section to realize accurate isolation of a fault point so as to ensure normal operation of a residual system. The method has the advantages of simplicity and convenience in operation, small calculation amount, low cost and the like.

The present application belongs to the technical field of electrified railway traction power supply, and particularly relates to a traction network multi-terminal longitudinal differential protection system and method under a double-sided through AT power supply mode. The system sets multi-terminal longitudinal differential protection elements according to uplink and downlink feeders, covers multi-terminal branches composed of traction substations, AT substations and partition substations, and each branch is configured with a current transformer. The protection element includes a power frequency variation current differential element, a T-line / F-line current differential element and a low-voltage differential current starting element, which are respectively adapted to fault transient and steady state characteristics, and realize rapid fault identification and accurate removal through cooperative action. The method combines current threshold criterion, voltage criterion and opposite side allowable signal to ensure the rapidity, selectivity, sensitivity and reliability of action, realize rapid removal of fault two-end power supply, reduce the fault isolation range, and ensure the safe and stable operation of the traction network.

The invention discloses tire production trimming equipment, and relates to the technical field of rubber and plastic product manufacturing industries, the tire production trimming equipment comprises a base and a tire, the tire is arranged at the top of the base, and a clamping device, a trimming device and an auxiliary device are arranged above the base. Clamping is carried out by making contact with the inner wall of a tire through an L-shaped rod, tires of various sizes can be processed through self-adaptive clamping, a special clamp does not need to be replaced, and therefore the flexibility of a production line and the universality of equipment are improved, after the tire is clamped, a rotating motor is matched with a driving shaft and a triangular frame, and preparation for rotary trimming of the tire is achieved; rotation of the lead screw is limited through the limiting button and the protruding block, and the situation that the lead screw is reversely rotated after being mistakenly touched, so that the clamping effect is lost, a tire is unstable and moves, and the follow-up trimming operation efficiency is affected is prevented.

The invention belongs to the technical field of mechanical equipment, and provides automatic cutting equipment. The device comprises a rack which is provided with a placing platform; the moving platform mechanism is arranged on the placement platform and comprises a working platform, a first moving assembly and a second moving assembly, the first moving assembly can drive the working platform to move in the first direction, and the second moving assembly can drive the working platform to move in the second direction; the first direction and the second direction are horizontally and vertically arranged; the detection mechanism is arranged on the rack, located above the working platform and used for detecting local defects of products placed on the working platform. And the cutting mechanism is arranged on the rack and comprises an upper cutting assembly and a lower cutting assembly which are matched with each other, and when the detection mechanism detects the local defect of the product, the local defect of the product is cut off. Local defects of the product can be accurately cut off.

The present invention relates to the technical field of fluorescent contrast agents, and specifically discloses a tumor-targeting polypeptide V-1-GGGK, a polypeptide conjugate thereof and an application thereof. The polypeptide is a V-1-GGGK polypeptide, and its amino acid sequence is shown in SEQ ID NO.1. The molecular probe is a near-infrared fluorescent dye covalently coupled to the polypeptide V-1-GGGK, and can be used as a tumor-targeting fluorescent molecular probe for real-time visualization of tumors and tumor boundaries, and has the advantage of assisting doctors to improve surgical accuracy.

The application discloses a kind of treatment equipment for reducing postoperative positive margin of prostate radical resection, including injection device for injecting PSMA probe into body, PET / CT imaging device, near-infrared fluorescence imaging device and surgical robot, near-infrared fluorescence imaging device shows the fluorescence level of tumor tissue and normal tissue of the prostate of the patient injected with probe, and prostate tumor tissue is fluorescently imaged according to the fluorescence intensity of probe in urine.The treatment equipment of the application carries out fluorescent imaging on tumor tissue during resection, and accurately positions, and the tumor tissue is accurately resected under the fluorescence navigation of surgical robot, and postoperative positive margin rate is significantly reduced;After prostate radical resection is carried out using the treatment equipment of the application, the risk of biochemical recurrence of patient is significantly reduced and prognosis is good;Moreover, it can also avoid the complications such as erectile dysfunction, urinary incontinence, urethral stricture caused by intraoperative damage to nerve and vascular bundle, and significantly reduce the influence on the quality of life of patient after operation.

This invention relates to the field of medical device technology, specifically to a guided, measurable integrated blade assembly for cervical LEEP surgery. The assembly includes a central column, a vernier sleeve, a rotary push assembly, a pull cord, a pivot shaft, a rope-driven assembly, and a cutting module. A guide probe is located at the top of the central column, comprising a rotating and telescopic column section and a screw-in portion. The guide probe is connected to the central column via the screw-in portion. A support sleeve is fixedly mounted in the middle of the central column, and the cutting module is mounted on the support sleeve. An operating sleeve is fixedly mounted at the rear of the central column, and a rope-driven assembly for controlling the pull cord is mounted on the side of the operating sleeve. The vernier sleeve is slidably fitted onto the outside of the central column. The guide probe of this invention provides navigation constraints along the cervical canal direction to prevent blade deflection; the vernier support provides depth limiting constraints by abutting against the external cervical os, ensuring consistent circumferential resection depth.

The invention discloses a multifunctional polarization imaging system and an accurate tumor recognition method thereof, and relates to the technical field of optical imaging, the system performs imaging by using the optical characteristics of tissues, and exogenous fluorescent dyes are not needed, so that the problems of sensitivity and specificity caused by dye labeling are avoided. According to the technical scheme, the OCT imaging system comprises a Stokes-Muller imaging module, a rotatable sample table module, a non-coaxial reflection type and transmission type illumination module and a multifunctional OCT module. According to the multifunctional polarization imaging system, transmission type, coaxial reflection type and non-coaxial reflection type Stokes-Mueller imaging, OCT imaging, PS-OCT imaging and OCTA imaging can be achieved while a sample is not moved. The multifunctional OCT module can simultaneously obtain an intensity attenuation curve, a polarization information image and an angiography image of light passing through a sample.

The present invention provides a rail flash removal device, comprising: an upper mold plate; an upper mold fixing rod connected to the upper mold plate; an upper mold sleeved on the upper mold fixing rod, the end face shape of the upper mold away from the upper mold plate is adapted to the shape of the web of the rail; a trimming mold connected to the upper mold plate and located on both sides of the upper mold plate; a lower mold assembly arranged opposite to the upper mold plate, the end face shape of the lower mold assembly facing the upper mold is adapted to the shape of the web of the rail, and the upper mold is located between the lower mold assembly and the upper mold plate. The rail flash removal device provided by the present invention can clamp and fix the rail during the flash removal process by the trimming mold assembly, thereby avoiding deformation of the rail. At the same time, after the flash removal is completed, the material can be unloaded only by controlling the trimming mold and the upper mold to be away from the lower mold assembly. During the unloading process, no friction is generated between the rail and the rail flash removal device, thereby avoiding the occurrence of die jamming, further avoiding deformation of the rail, and ensuring the quality of the rail.

The present invention discloses a preparation device and method for preparing a PCR composite film, and relates to the technical field of material film preparation. It includes a casting machine for preparing a PCR composite film, and the casting machine includes: a transmission component for transporting a fluid PCR composite film raw material, a feeding component installed at one end of the top of the transmission component, and used to add the fluid PCR composite film raw material, and a processing component installed at the middle end of the top of the transmission component, and used to make the fluid PCR composite film raw material on the top surface of the transmission component form a film, and based on the state inside the film, the PCR composite film is separated into two parts. The present invention effectively releases the gas in the raw material through uniform heating of the fluid heater, prevents the generation of bubbles inside the film body, and ensures the uniformity and stability of the film product. In addition, the processing component can intelligently separate the PCR composite film into two parts, which provides convenience for the subsequent winding work.