822 results about "Natural state" patented technology

The invention discloses a method for predicting plant photosynthetic ability by using plant leaf traits, and relates to the technical field of agricultural science, and the method comprises the following steps: obtaining image data of a target plant leaf in a natural state through a high-resolution imaging device, and synchronously recording environment parameter information during collection; extracting multi-dimensional feature parameters of the leaf based on the image data, wherein the multi-dimensional feature parameters comprise a color index, a texture feature, an area, a thickness estimation value and an edge contour form; and carrying out stress feature identification on the character data by utilizing an association rule of the environmental parameters and the leaf characters. According to the invention, by introducing a stress identification and data correction mechanism, the accuracy of photosynthetic capability prediction is improved; the method has good environmental adaptability and crop universality, and is suitable for various agricultural scenes; and a prediction feedback closed-loop system is constructed, continuous optimization and intelligent adjustment of the model are realized, and the stability, reliability and practical application value of the system are remarkably enhanced.

The invention relates to a delivery device for delivering a self-expanding tubular implant and a system comprising the same. The conveying device comprises a pushing rod; at least one expandable body disposed at a distal end of the push rod, the expandable body configured to: axially elongate in a radially constrained contracted state; under the expansion state of releasing the constraint, radial expansion and axial contraction are realized; the elastic core wire is arranged in the expandable body in a penetrating mode and connected with the two ends of the expandable body, and the core wire is kept in a straight line shape in the natural state and the contraction state of the expandable body. The conveying device provided by the invention can be matched with a small-size micro catheter and can provide enhanced axial pushing force in the conveying process, so that the pushing efficiency and the operation stability of the tubular implant are improved; meanwhile, the radial expansion force provided by the expandable body can form effective auxiliary support for the implant, rapid wall attachment and stable expansion of the implant are promoted, and therefore the release effect of the implant is improved.

The invention relates to the technical field of pile foundation construction, and particularly discloses a pile foundation drilling steel casing mounting device which comprises a base and a position adjusting mechanism, the position adjusting mechanism comprises a coaxial correction assembly, a mounting hole is formed in the base, and the coaxial correction assembly comprises two clamping pieces which are symmetrically arranged up and down; the clamping piece comprises a clamping arm, a first retaining elastic piece, a rotating shaft, a first gear, a clamping plate and a second retaining elastic piece; when the first retaining elastic piece is in a natural state, the clamping arm is kept at the initial position, a clamping face used for clamping the peripheral face of the steel casing is arranged on the inner side of the clamping plate, and when the second retaining elastic piece is in a natural state, the clamping plate is located at the initial position. When the steel casing installation device for pile foundation drilling is used, the position of a steel casing can be automatically adjusted, the steel casing to be in butt joint and an embedded steel casing are coaxial, constructors do not need to continuously observe the position of the steel casing and conduct manual adjustment, and therefore the construction efficiency is improved.

The invention relates to a self-expanding stent delivery device and a system comprising the same. The self-expanding stent conveying device comprises a pushing rod; the radial force storage structure extends in the axial direction and is arranged at the far end of the pushing rod, and an inner cavity extending in the axial direction is defined in the radial force storage structure; the positioning line extends in the axial direction and penetrates through an inner cavity of the radial force storage structure; the positioning line is in a natural state; the fixing components are at least arranged at the near end and the far end of the positioning line effective area, and the near end and the far end of the positioning line effective area are fixed to the cavity walls of the inner cavities at the near end and the far end of the radial force storage structure respectively. Through cooperative cooperation of the radial force storage structure, the positioning line and the fixing part, while the auxiliary expansion effect on the self-expanding stent is ensured, displacement of the fixing part possibly caused by release of the radial force storage structure is effectively restrained, and therefore reliable conditions are provided for accurate release of the self-expanding stent.

The invention discloses a field miniature PVC litter decomposition experiment ring which comprises a miniature ring structure, observation opening structures are oppositely formed in the outer surface of the miniature ring structure, a nylon net structure with the pore diameter of 5 mm is glued in an inner cavity of one observation opening structure, a nylon net structure with the pore diameter of 50 microns is glued in the other observation opening structure, and the inner cavity of the other observation opening structure is glued with a nylon net structure with the pore diameter of 50 microns. The top of the outer ring of the miniature ring structure is sleeved with a disassembly and assembly ring, and a cover net structure which is in a stretched state and has the aperture of 50 micrometers is glued to the top of the disassembly and assembly ring. Firstly, the influence of microenvironment interference and physical limitation in the litter decomposition process is solved, and the situation that the decomposition rate deviates from a true value due to litter compaction and rainfall erosion in the environment is avoided; secondly, the problem that a litter mesh bag method changes the feeding preference of soil animals is solved, it is ensured that the decomposition behavior is consistent with the natural state, and finally, due to the fact that the decomposition process is protected by the miniature environment, the influence of human factors and large animals is avoided.

A bionic pedaling and jumping foot of a lunar surface jumping robot belongs to the technical field of engineering bionics, and comprises a sole component, three bionic toes and a bionic toe tip, the sole assembly is provided with a leg connecting piece and a plurality of through cavities; the bionic toes are connected with the sole assembly through first metatarsophalangeal joints to form axial symmetry distribution, the included angle between every two adjacent toes is 20 degrees, and each bionic toe is provided with a bionic toe cavity. The tail end of the bionic toe tip is provided with a bionic foot thorn, and the bionic toe tip is connected with the bionic toe through a second metatarsophalangeal joint; the rigid rope penetrates through the sole cavity and the bionic toe cavity, one end of the rigid rope is connected with the leg bouncing mechanism, and the other end of the rigid rope is fixed to the round rod of the bionic toe tip. Foot end joints are kept in a relaxed posture by torsion springs in a natural state; the rigid rope pulls the tension spring to store energy and is locked by the ratchet mechanism, and the toes are synchronously driven to contract to form a sand grabbing and fixing state; during starting, the motor drives the ratchet wheel to release energy, the tension spring contracts to realize pedaling action, and the torsion spring synergistically releases energy to enhance jumping performance. A high-adaptability foot end solution is provided for the celestial body exploration robot, and the trafficability and movement stability of complex terrains are effectively improved.

The invention discloses an earphone which comprises a sound production part, an abutting part and an ear hook, the ear hook is connected with the sound production part and the abutting part, and the ear hook provides elastic acting force between the sound production part and the abutting part, so that the sound production part and the abutting part have clamping force for clamping the two sides of the auricle in a wearing state. Wherein the ear hook is arranged to enable the sound production part and the abutting part to abut against each other in a natural state so as to form a pre-tightening force. Through the above mode, the adaptability of the earphone can be improved.

The invention discloses a bionic ankle joint and an artificial limb, the bionic ankle joint comprises an ankle joint base and a sole mechanism, and the ankle joint base is used for being connected with a leg component; the sole mechanism comprises a front sole component, a rear sole component and at least one elastic piece, the rear sole component is rotationally connected with the ankle joint base, the front sole component is rotationally connected with the rear sole component, one end of the elastic piece is connected with the rear sole component, and the other end of the elastic piece is connected with the front sole component; the elastic component is used for providing elastic restoring force when the front sole component rotates relative to the rear sole component. The sole fitting degree is improved through multi-joint linkage, the gait stability is enhanced, the additional burden caused by uneven stress is avoided, energy recycling is achieved through the elastic piece, energy consumption is reduced, meanwhile, the pedaling effect is improved through elastic assistance in the pedaling stage, the motion characteristic of the bionic ankle joint is closer to the natural state of the human body, and the mechanical performance of the bionic ankle joint is improved. And the matching degree of equipment and human motion characteristics is improved.

The invention discloses a drug eluting stent, which comprises a stent main body and a plurality of thorn-shaped components, the stent main body has a radially compressible contraction state and a radially self-expanding expansion state to support blood vessels, and the plurality of thorn-shaped components are arranged on the outer surface of the stent main body and coated with a drug coating for inhibiting vascular restenosis. The spine-shaped components protrude from the outer surface of the stent body to the outer side of the stent body so as to penetrate into calcification lesions on the inner wall of a blood vessel when the stent body is switched from the contraction state to the expansion state, each spine-shaped component comprises a spine section, and the spine section at least comprises a first section and a second section of which the roots are connected together. The first section and the second section are attached to each other in a natural state to form a compact structure, and can elastically deform and be separated relative to the root part when subjected to opposite acting force from calcification lesion, so that the calcification lesion can be punctured at a larger angle, the slippage risk is reduced, the puncturing efficiency is improved, and the puncturing effect is improved. Therefore, the effect of inhibiting vascular restenosis is enhanced.

The utility model provides a rail butt joint safety device for shuttle vehicle layer changing and a three-dimensional warehouse. The rail butt joint safety device for shuttle vehicle layer changing comprises a goods shelf side rail. The blocking mechanism is rotationally arranged on the goods shelf side rail; the natural state of the blocking mechanism is a normally closed state so as to block the shuttle vehicle; the telescopic track is arranged on the layer changing elevator and is provided with a track driving mechanism; the telescopic track is used for stretching out when the horizontal height is increased to be flush with the goods shelf side track; and under the action of the telescopic track, the blocking mechanism is switched from a normally-closed state to an open state. The blocking mechanism is switched from a normally-closed state to an open state only under the action of the telescopic rails, the whole device is driven by only one set of rails in a telescopic mode, after the rails are in butt joint successfully, the blocking mechanism is automatically opened in a mechanical linkage mode, and passing safety is guaranteed.

The utility model discloses a self-ligating bracket which comprises a bracket body and a lock cover, one side of the bracket body is used for bonding a tooth surface, the other side of the bracket body is provided with an arch wire groove, one side, provided with the arch wire groove, of the bracket body is provided with a sliding groove, and the lock cover is installed on the bracket body in a sliding mode through the sliding groove. One end of the lock cover is located at a notch of the arch wire groove, an elastic piece is installed on the side, close to the bottom of the sliding groove, of the lock cover, and an arc-shaped limiting block is elastically arranged on the elastic piece. Limiting grooves matched with the arc-shaped limiting blocks are formed in the positions, located at the bottoms of the sliding grooves, of the bracket body; when the arc-shaped limiting block is clamped into the limiting groove, the arc-shaped limiting block is in a natural state. The application has the effects of reducing the situation of locking and unlocking failure of the lock cover and guaranteeing the treatment progress.

The invention discloses a flexible grinding device for granular medicine, and particularly relates to the technical field of the international classification number B02C7 / 02. The device comprises a grinding container, a flexible diaphragm is arranged at the bottom of the grinding container, and a sealed A cavity is formed between the flexible diaphragm and the bottom end of the grinding container; the upper space of the flexible diaphragm is a grinding chamber B; the flexible diaphragm is in a downward concave surface shape in a natural state; grinding and pestling; a spinning cover is fixed at the upper part of the grinding pestle; the spinning cover covers the upper opening of the grinding container and is in running fit with the upper opening; the middle of the grinding pestle is a transmission rod; the grinding end face of the lower portion of the transmission rod is an upper concave face. According to the grinding and dissolving device, grinding and dissolving can be achieved while a solution is contained, the flexible diaphragm is adopted as a bearing body of the grinding bottom face, the flexible diaphragm can be tightly attached to the grinding end face at the final stage of grinding, in this way, the ground granularity is finer, the dissolving efficiency is higher, and more labor is saved in use.

The application discloses a kind of laser welding equipment of pipe fitting, the top end of positioning block is located below the flat body of pipe fitting, the other end is detachably mounted for connector, is provided with an installation block on the upper surface of the installation platform and in the side close to accommodating groove, the top of this installation block is fixedly installed with a rotary jaw, the rotary jaw includes pressing part, clamping part, the clamping part with mounting hole is located above accommodating groove, the mounting hole is detachably connected with a pressing block with fixed rod, when rotary jaw is in natural state, the flat body of the pipe fitting is located between pressing block and positioning block, the top of the positioning block has a notch groove, for pipe fitting, connector welding.The application can improve the position accuracy of pipe fitting, improve the gap accuracy between pipe fitting and connector, and avoid the situation that the position of flat body is deviated due to the arching of pipe body, and improve the overall welding effect.

The utility model discloses a scavenging valve and an atomizer, and the scavenging valve comprises: a support member provided with a cavity; a ventilation channel is formed in the cavity and comprises a first channel and a second channel; the switch piece is arranged in the cavity; the switch piece is provided with a first lip edge part and a second lip edge part; in a natural state, the first lip edge part and the second lip edge part are configured to be attached to the supporting piece so as to close the first channel and the second channel; in the ventilation state, one of the first lip edge part and the second lip edge part is attached to the supporting piece, the other lip edge part is at least partially separated from the supporting piece, then one of the first channel and the second channel is selected to be open, and the other lip edge part is kept closed. The two ends of the scavenging valve are communicated through the scavenging channel, and the movable part of the switch piece can be used for separating or communicating the scavenging channel, so that the scavenging valve can be communicated with the liquid storage cavity and the outside of the liquid storage cavity, pressure balance is realized through gas exchange, and the leakage risk and the dry burning risk of the aerosol matrix are reduced.

The invention discloses a long-distance seasonal throttling shoreline natural condition evaluation method based on a remote sensing image, and belongs to the technical field of ecological monitoring. The method comprises the following steps: synchronously obtaining a remote sensing image set, dividing the remote sensing image set into a plurality of sub-image sets according to seasons, obtaining a processed sub-image set, extracting topographic features of a region, extracting earth surface element information, obtaining a soil type distribution condition according to soil spectral data of the region, and establishing engineering time sequence distribution features; constructing a time-space coupled evaluation index system based on the earth surface element information, the soil type distribution condition and the engineering time sequence distribution characteristics; calculating a shoreline natural condition score of each region in the season based on the evaluation index system; and finally generating a seasonal natural state evaluation result covering the whole target shoreline. According to the method, the limitation of single-dimension evaluation is avoided, the real natural conditions of the shoreline in different seasons and different areas can be accurately and systematically reflected, and comprehensive data support is provided for subsequent scientific decision making.

The invention relates to a shearing device for a tile press, which comprises a workbench, an upper cutter, a lower cutter and a driving part, and further comprises a material receiving table, a material receiving part is hinged to the material receiving table, an elastic part is arranged on the material receiving part, when the elastic part is in a natural state, an included angle formed by the upper surface of the material receiving part and the horizontal plane is less than 10 degrees, and the material receiving part is used for being clamped into a groove. And an elastic ring is arranged on the material receiving piece. Through secondary buffering of the elastic piece and the elastic ring, the impact force of falling of the plate body is comprehensively reduced, so that the situation that the plate body collides with the material receiving table or the plate body on the material receiving table is damaged due to collision is reduced, the product percent of pass of the metal panel is improved, the plate body is limited by clamping the material receiving piece into the groove in the plate body, and the production efficiency is improved. And the plate bodies slide downwards along the material receiving piece according to a specified path, so that the plate bodies can be stacked more orderly, and workers do not need to arrange the plate bodies.

An unpowered goods channel and beverage cabinet comprises a bracket assembly used for supporting the goods channel on a cabinet body, the bracket assembly is provided with a left side wall and a right side wall, and the left side wall and the right side wall jointly define a goods channel; the push plate mechanism is installed on the bracket assembly, and the push plate mechanism continuously provides pushing force pointing to the outlet direction of the goods channel for the goods stored in the goods channel; the goods outlet mechanism comprises a pair of limiting plates and a pair of blocking pieces, the pair of limiting plates are rotatably connected to the front ends of the left side wall and the right side wall correspondingly, and the limiting plates are configured to shield the front portion of the goods channel outlet in a natural state and can be opened under the action of external force to expose the outlet; the pair of blocking pieces is located behind the pair of limiting plates and installed on the left side wall and the right side wall respectively, each blocking piece is provided with an elastic telescopic element, and the blocking pieces can stretch into the commodity channel to block rear commodities from moving forwards along the commodity channel.

The seamless continuously-formed knitted one-piece panty-hose comprises a first sock leg, a panty body and a second sock leg which are sequentially formed at a time. The pant body comprises a plain weave base layer formed by weaving basic yarns, and a floating thread weave and / or tuck weave plaiting layer formed by adding additional yarns on the base layer for weaving; and at least one part of the plaiting layer is a high-tension adjusting layer, so that the crotch part of the pants body presents a concave curved surface in a natural state. According to the obtained one-piece panty-hose, no seam is generated, and the problems that in the prior art, the seam affects the attractiveness and brings discomfort to a wearer are solved; due to the design of the high-tension adjusting layer, the problems of crotch falling, non-fitting and the like of the one-piece pantyhose are effectively solved; the product is further provided with a local tension reducing structure, so that the shape of the product is improved, and meanwhile, the product is more fit to wear.

The utility model discloses an intestinal juice perfusion testing device used before temporary fistulization reduction. The intestinal juice perfusion testing device comprises an outer shell with the hollow bottom, a perfusion assembly wrapped in the outer shell and a water pump assembly. One end of the filling assembly is plugged into the far end of the fistulization opening, and the other end is connected with a water outlet of the water pump assembly; the outer shell is semicircular, and the bottom of the outer shell is movably connected with the base plate of the two-piece fistulization bag. According to the intestinal juice perfusion testing device used before temporary fistulization and reduction, intestinal juice can be directly perfused into a far-end intestinal canal for temporary fistulization, the flowing condition of the intestinal juice in the natural state is simulated, and therefore the healing condition of a rectum anastomotic stoma, the recovery degree of the anus function and the adaptability of the colon function are evaluated more accurately.

The utility model provides an auxiliary device for sleeving a casing into a filling pipe, which comprises a curled film main body, the film main body is curled in a natural state to form a C-shaped tubular structure with a longitudinal opening, and horn mouth parts are arranged at two ends of the film main body. By arranging the curled film main body and utilizing the C-shaped tubular structure formed in the natural state, when the auxiliary device is sleeved into the filling pipe, the tubular film main body can form a temporary isolation layer between the casing and the filling pipe. And the chance that the casing is in direct contact with the port or the pipe wall of the filling pipe is reduced, so that the risk that the casing is damaged due to direct scratching is reduced, and the casing is protected. And the horn mouth parts arranged at the two ends of the film main body provide effective guidance for sleeving the auxiliary device into the filling pipe and subsequently sleeving the casing into the auxiliary device. Therefore, an operator can more easily align and place the auxiliary device at the port of the filling pipe, the alignment operation is simplified, and the smoothness of the sleeving process is improved.

The utility model belongs to cup taking device technical field, especially relate to a disposable cup taking device. A disposable cup taking device, include: cup body, its inside has the accommodating cavity, the top of cup body is equipped with with accommodating cavity's opening, cup support platform is movably established in accommodating cavity bottom, constitutes the bottom plate of accommodating cavity, and be configured as along the height direction of cup body slides to adjust the volume of accommodating cavity, elastic member, its setting in cup body, be used for to cup support platform provide the elastic thrust to opening direction, to continuously reduce the volume of accommodating cavity, and push disposable cup to opening direction movement, a plurality of elastic clamping jaw, it is configured to: in natural state elastic clamping the topmost disposable cup, to resist the thrust of elastic member makes opening area only topmost disposable cup exposes outside. The utility model has the advantages of more scene, better convenience.

The embodiment of the application provides a cleaning device and a control method thereof, and relates to the technical field of cleaning devices. The cleaning device comprises a machine body and a floor brush assembly; the floor brush assembly comprises: a mounting seat; a cleaning piece rotatably arranged on the front side of the mounting seat; and a front scraping strip arranged on the front side of the cleaning piece, the front scraping strip being capable of ascending and descending relative to the mounting seat. The front scraping strip comprises a first scraping part extending along the axial direction of the cleaning piece and a second scraping part extending laterally to the cleaning piece, and in a natural state, the bottom of the second scraping part is lower than the bottom of the first scraping part. The front scraping strip is configured to contact the second scraping part to the cleaning piece before the first scraping part contacts the cleaning surface when descending, so as to scrape the water on the side of the cleaning piece to the cleaning piece through the second scraping part when the floor brush assembly turns. Through the specific structure of the front scraping strip, the water stains on the cleaning surface can be scraped to the cleaning piece when the floor brush assembly is pulled backward and turns backward, so that the water stains are prevented from remaining on the cleaning surface, and the cleaning effect and the user experience are improved.

The utility model discloses a press deflation type hand vacuumizing wine stopper which comprises a stopper seat, an exhaust pipe, a piston rod and a handle, a deflation rod is arranged in the piston rod, the lower end of the deflation rod can stretch out and retract from the lower end of the piston rod, an air hole is formed in the bottom of the exhaust pipe, a deformable hole stopper is arranged at the position of the air hole, and the hole stopper can block the air hole in a natural state. When the lower end of the sliding deflation rod extends out of the lower end of the piston rod and extrudes the hole plug to deform, the air hole is opened. When the wine bottle is used and wine cannot be drunk up after being opened, a user can install the wine plug at the position of a bottle opening and then operate the piston rod to slide up and down to pump out air in the bottle, so that the remaining wine in the bottle is stored in a vacuum state, and the wine is prevented from being oxidized; when people need to enjoy the remaining red wine next time, the lower end of the deflation rod can be pressed downwards to extrude the hole plug to deform so as to open the air hole, air outside the bottle can be discharged into the bottle through the air hole, air pressure inside and outside the bottle is balanced, the wine plug can be easily pulled to be separated from the bottle opening, and the wine plug opening operation is convenient and labor-saving.

The utility model discloses a locking mechanism, a stamping storage battery bolt, a storage battery and a motor vehicle. The locking mechanism comprises a connecting piece and a locking hole formed in the connecting piece, a first clamping arm and a second clamping arm are arranged, and an abutting piece is installed between a bolt and the first clamping arm and between the bolt and the second clamping arm; an elastic piece used for keeping the separation trend of the bolt and the abutting piece is arranged between the head of the bolt and the abutting piece. The bolt sequentially penetrates through the elastic piece, the second channel and the first channel and is matched with the nut to be installed on the first clamping arm and the second clamping arm. The technical scheme has the advantages that the elastic piece is arranged between the head of the bolt and the abutting piece, the bolt and the abutting piece are normally separated by providing elastic force, so that rotation of the nut in a natural state cannot drive the locking mechanism to act, misoperation is prevented, and the locking mechanism can be locked only after the elastic force is overcome to enable the bolt to abut against the abutting piece. Locking can be effectively driven through rotation of the nut, and therefore reliable separation of a safe state and a working state is achieved.

The invention discloses a composite reinforcing method and device for a soft soil levee slope based on prestressed corrugated pile emergency support, and the method comprises the steps: investigating a to-be-reinforced levee slope and engineering geological conditions in an influence range of the to-be-reinforced levee slope, and obtaining investigation data; calculating by setting a slope stability analysis strategy to obtain a natural state safety coefficient; the state of the to-be-reinforced levee slope is judged, and a state result is obtained; according to a state result, a cement-soil mixing pile temporary construction platform, a composite reinforcing area, a prestress wave-shaped pile and a three-dimensional drainage system are designed; and performing construction preparation and reinforcement construction according to the design scheme. The problems of temporary emergency and permanent splitting, construction disturbance instability, high cost, river channel occupation, difficulty in considering efficiency and ecology and the like in the prior art are solved.

The invention provides an ultrasonic imaging device and an ultrasonic imaging system.The ultrasonic imaging device comprises an interventional catheter assembly and an operating handle assembly, the operating handle assembly is provided with a first handle end, and the interventional catheter assembly is connected to the first handle end; the operating handle assembly is further provided with a main body and a switching piece, the main body has initial damping, the main body can be switched between a first state and a second state through the switching piece, and the initial damping restrains the interventional catheter assembly when the main body is in the first state so that the interventional catheter assembly can deform from a natural state to a specified state; when the main body is in the second state, the initial damping relieves constraint on the interventional catheter assembly, and the interventional catheter assembly returns to the natural form from the specified form. According to the interventional catheter assembly, the interventional catheter assembly can be locked to the designated form through initial damping of the main body, one-key unlocking can be achieved through the switching piece, controllability is guaranteed, locking and unlocking operations are simpler, and the use experience is improved.

The present invention discloses a method for obtaining the reinforcement parameters of glass fiber bars for the face of a soft soil tunnel, including: constructing a three-dimensional model of the tunnel and its surrounding rock in the natural state; conducting simulated excavation and calculating the reinforcement parameter I of the glass fiber bars required when the safety factor of the face reaches a set value; conducting on-site tests to monitor the maximum extrusion deformation and the deformation influence depth at the center position of the tunnel face caused by each excavation cycle; back-calculating the mechanical parameter II of the surrounding rock from the maximum extrusion deformation of the face measured in each excavation cycle in the test section, keeping the length of the glass fiber bars unchanged, and recalculating the reinforcement parameter II of the glass fiber bars required when the safety factor of the face reaches the set value; conducting simulated excavation and calculating the maximum extrusion displacement and the safety factor of the face corresponding to the glass fiber bars with different remaining lengths on the face in each excavation cycle during the excavation process; determining the optimal lap length of the glass fiber bars during the construction process, and considering both safety and economy in the design of the reinforcement parameters.

This application discloses a method and system for predicting reservoir bank landslides induced by reservoir impoundment based on the principle of refraction. The method includes: obtaining the natural slope angle above water in the natural state and the stable slope angle underwater in the saturated state of the target reservoir bank slope; introducing and calculating the refractive index to characterize the degree of difference between the natural slope angle above water and the stable slope angle underwater; the introduction of the refractive index is based on the understanding of landslide mechanisms: during reservoir impoundment, the water surface acts as an interface for abrupt changes in the physical and mechanical properties of the soil and rock mass, leading to a discontinuous reconstruction of the slope's stable morphology with the water surface as the boundary. The reservoir impoundment process follows the principle of mass conservation, and the actual inclination angle of the failure surface, instead of the natural slope angle above water, better reflects the mechanical state of the slope during instability; based on the value of the refractive index, the instability risk and progressive failure range of the target reservoir bank slope during reservoir impoundment are qualitatively or quantitatively predicted. This application improves the early risk identification and dynamic warning capabilities for reservoir bank landslides induced by impoundment.

The present application relates to the technical field of medical devices, and provides a system with a spiral structure for cavity embolization and a delivery method, the system comprising: an embolization device which is in a spiral structure in a natural state and can be freely stretched and contracted under stress; the embolization device comprises an inner mesh layer and an outer mesh layer which are concentrically arranged, and the sparseness of the outer mesh layer is greater than that of the inner mesh layer; the embolization device is used for sleeving the embolization stent and the inner circle of the spiral structure is tightly attached to the outer wall of the embolization stent. The system, after the release of the embolization device with a spiral structure, can tightly adhere to the periphery of the embolization stent, increase the diameter of the cavity part of the embolization stent, fill the entire cavity or cyst in a physical occupation manner, improve the occlusion effect, avoid the occurrence of internal leakage, and thus avoid secondary surgery. Moreover, since the sparseness of the outer mesh layer is greater than that of the inner mesh layer, the blood flow direction can be better changed, the blood flow speed is reduced, the endothelial material in the blood is quickly deposited in the embolization, the endothelialization is completed, and the tumor cyst is atrophied.

The utility model discloses an anti -pulling expansion bolt, including expansion sleeve, the bolt body of having expansion head in one end, the bolt body of having the stud portion in the other end is worn in expansion sleeve, and the stud portion is connected with the lock nut on the screw thread, and the expansion sleeve is surrounded with a plurality of lateral mouth extending along the axial direction, and the U type elastic sheet is buried in the lateral mouth, and the U type elastic sheet includes the first elastic sheet partial body of arranging outward, the second elastic sheet partial body of arranging inward, the first elastic sheet partial body is connected with the expansion sleeve to the one end of facing expansion head, and the other end is connected with the second elastic sheet partial body, and the second elastic sheet partial body stretches out the inside of lateral mouth, and the first elastic sheet partial body under the natural state does not stretch out the outside of lateral mouth, and the extrusion ring is equipped on the bolt body, and the extrusion ring is equipped between the lateral mouth and expansion head. When the expansion bolt is in the expansion state at the sleeve head part, will make the extrusion ring extrude the U type elastic sheet outward, causes its to stretch out the aperture and press into the bolt hole hole wall of reserving, thereby strengthens the anti -pulling capacity.