529 results about "Tree root" patented technology

The invention discloses an ecological slope protection structure and a construction method thereof.The ecological slope protection structure comprises an ecological vegetation layer formed by splicing a plurality of units, and a vegetation planting groove is formed in each unit; the regulation and control layer comprises a honeycomb-shaped coarse aggregate layer, a corrugated plate laminated middle aggregate layer and a fractal tree-root-shaped fine aggregate layer of which the porosity decreases progressively from top to bottom; the drainage mechanism comprises a drainage channel in the ecological vegetation layer, a porous drainage framework and a water collecting well arranged at the slope bottom; the anchoring mechanism comprises a plurality of umbrella-shaped expansion anchor rods, and the lower end of each anchor rod is perpendicular to the slope surface and is inserted into the slope surface soil layer; the lower end of each anchor rod is provided with four sets of extensible 120-degree arc-shaped anchor flukes, and the surfaces of the anchor flukes are provided with bionic ground gripping grooves consistent with the anti-sliding ribs in trend. By innovatively designing the ecological vegetation layer, the regulation and control layer, the drainage mechanism and the anchoring mechanism, stability of the slope protection structure in mechanical property and sustainable development of the ecological environment are achieved, and coordination and unification of vegetation growth and slope stability are promoted.

The invention discloses a data ownership verification and authorization control method based on zero knowledge proof. The method comprises the following steps: constructing a traceable Merk tree structure on a block chain or a distributed account book; a data owner calculates data fingerprints and packages the data fingerprints into declaration nodes to be inserted into the traceable Merk tree; storing the ownership zero knowledge proof and the traceable Merk tree root hash into a block chain together; the verification party executes the zero-knowledge verifier contract on the chain to complete ownership verification without reading original data or identity plaintext; access control is realized after on-chain verification of the service party; triggering local heavy hash to update the traceable Merk tree root hash, and broadcasting a revocation event on a chain; and confirming legality of evolution and authorization change of all nodes. According to the method, the historical traceability and structural consistency of the data ownership and authorization relationship are ensured, and efficient traceability and anomaly detection of the node evolution chain are also realized.

The invention discloses a garden tree transplanting device, and relates to the technical field of garden planting, the garden tree transplanting device comprises a U-shaped moving vehicle and a connecting fixing hoop, two supporting seats are symmetrically fixed on two sides of the middle of the U-shaped moving vehicle, mounting grooves are formed in the upper parts of the two supporting seats, and winding and unwinding structures are symmetrically mounted in the two mounting grooves; the connecting and fixing hoop sleeves a trunk of a tree, the controller controls the winding and unwinding structure to work to pull up the tree to be separated from a tree pit, then the two adjusting tree root protection structures are manually operated to be closed to wrap and protect the bottom root of the transplanted tree, additional damage to the root of the tree in the transplanting process is avoided, and the integrity and health of the tree are ensured. A liquid conveying structure is matched to convey a nutrient solution in the process of moving to a new transplanting area, so that necessary nutrition is guaranteed; meanwhile, the linkage structure is driven, the sterilization structure is driven to work, the sterilization structure compresses air to spray rooting powder to the bottom of the rising transplanted tree, the soil environment can be improved, and plant rooting is promoted.

The invention discloses a forestry pest control and plowing integrated device, and relates to the technical field of forestry plowing, the forestry pest control and plowing integrated device comprises a base and four electric wheels, the four electric wheels are all mounted at the bottom of the base, two sleeve plates are fixedly connected to the bottom of the base, and sleeve plates are slidably connected in the sleeve plates; wherein the outer surface, close to the bottom, of one sleeve plate is fixedly connected with a first driving motor, a transmission roller is rotationally connected between the two sleeve plates, an output shaft of the first driving motor penetrates through one end of each sleeve plate to be fixedly connected with the transmission roller, and the outer surface of the transmission roller is fixedly connected with a plurality of soil raking cutters. By means of the inclined filtering plate, tree roots in thrown loose soil can be intercepted by the inclined filtering plate, the soil can fall down through holes in the inclined filtering plate, and by means of the mode that some residual tree roots are filtered through vibration, pests inhabiting in the tree roots in the soil can be effectively reduced, the risk that follow-up planted crops are attacked by the pests is reduced, and the ploughing and insect prevention effect is effectively improved.

The invention relates to the technical field of microbial agents, in particular to a composite microbial agent and application of the composite microbial agent in prevention and treatment of forest root diseases, and the composite microbial agent comprises the following components in parts by weight: 15-25 parts of Trichoderma harzianum ATCC 20847; 10 to 20 parts of bacillus subtilis ATCC 605, 10 to 20 parts of bacillus subtilis ATCC 605, 10 to 20 parts of bacillus subtilis ATCC 606 and 10 to 20 parts of bacillus subtilis ATCC 607. 5-10 parts of a seaweed extract; 3 to 8 parts of chitosan; 2-5 parts of humic acid; 1 to 3 parts of glycine betaine; 0.5 to 1.5 parts of a trace element compound; 30 to 40 parts of perlite powder; according to the present invention, the fertilizer has characteristics of significant inhibition effect on a variety of forest root pathogenic bacteria, wide prevention and control spectrum, and long-term and stable disease prevention effect by adjusting the rhizosphere micro-ecosystem. Diseases are prevented and controlled, and the growth and root development of the forest trees are remarkably promoted.

The invention belongs to the technical field of tree transplanting, and discloses a forestry tree transplanting device which comprises a support, two fixing pins are fixedly connected to the middle of the support, a connecting plate is fixedly connected to the bottom of the right side of the support, a rotating block is rotatably mounted in the middle of the connecting plate, and a hemispherical plate is fixedly connected to the right side of the rotating block. The transmission gear drives the control gears on the two sides to rotate, the control gears rotate to drive the spur rack to rotate through the connecting pin, and when the spur rack rotates in the lower half circle, the spur rack drives the tooth column to rotate and slides downwards along the tooth column at the same time, so that the cutting saw is driven to slide along the arc-shaped groove; similarly, when the spur rack rotates in the upper half circle, the tooth column rotates to drive the arc-shaped rack to slide reversely along the arc-shaped groove, the arc-shaped rack sliding back and forth can partition the tree root, and therefore the problem that it is difficult for an existing spherical digging knife to cut the thick tree root at a time is solved.

The invention relates to the technical field of network information, in particular to a training method and device based on online tree search, equipment and a medium, and the method comprises the steps: carrying out the initialization processing of given prompt information based on entropy guide tree search, and generating a guide tree root; selecting a bifurcation point of a guide tree root according to the entropy value, and performing extension processing on the bifurcation point of the guide tree to obtain a tree structure; and calculating a node value in the tree structure by using a Monte Carlo method, calculating a reward signal based on the node value in the tree structure, and strengthening the tree search strategy model. The exploration diversity is enhanced through tree search, the learning efficiency is improved through process supervision, a closed-loop optimization system is formed, the capacity of a large language model on complex reasoning tasks such as mathematics and programming is remarkably improved, and the method has wide application value.

The present invention relates to the technical field of tree transplantation, and discloses a tree transplantation device for garden construction based on green environmental protection, including a tree root shoveling mechanism. Above the tree root shoveling mechanism, there is a water spraying structure. Above the water spraying structure, there is a tree trunk clamping mechanism. Behind the tree root shoveling mechanism, there is a driving mechanism. The rear side of the driving mechanism is fixedly connected with a welding panel. One end of the tree trunk clamping mechanism close to the driving mechanism is fixedly connected with an L-shaped fixing rod. The tree root shoveling mechanism includes a circular plate. The outer side surface of the circular plate is fixedly connected with a first gear. Inside the circular plate near the first gear, there is a sliding bar slidably connected. The upper and lower surfaces of the sliding bar are both fixedly connected with cylinders. The front side surface of the sliding bar is fixedly connected with a small gear. The present invention has the characteristics of stabilizing trees, automatically watering, and improving the survival rate of transplanted trees.

A resource processing method, including: receiving a first cross-chain proof transmitted by a node on a first blockchain, the first cross-chain proof carrying a first resource transfer record that has been uploaded to the first blockchain, a plurality of first blocks existing in the first blockchain, a plurality of second blocks in one-to-one correspondence with the plurality of first blocks existing in the second blockchain; verifying validity of the first resource transfer record based on the feature tree root feature of each second block header in the second blockchain to obtain a first verification result; and in response to the first verification result indicating a pass of the verification, unlocking and transferring out a second resource determined according to the first resource, from a second preset account in the second blockchain that corresponds to the first preset account.

The invention discloses a data processing method and related equipment so as to improve the starting speed of a confidential virtual machine. The method comprises the following steps: receiving a secret virtual machine mirror image from client equipment and a hash tree corresponding to the secret virtual machine mirror image, and measuring a value of a root node of the hash tree to obtain a first measurement value; and running the confidential virtual machine according to the confidential virtual machine mirror image, wherein the first metric value is used for proving the integrity of the confidential virtual machine.

The invention discloses a depth data recovery method for a damaged BTRFS file system, and the method is characterized in that the method comprises the following steps: S100, employing a data structure of the BTRFS file system to obtain undamaged metadata, including a super block, a block tree, a root tree and a file system tree; s200: scanning the space in the partition except the metadata which is not damaged in the step S100, and extracting damaged metadata according to the structural characteristics of the metadata of the BTRFS file system; and S300, analyzing the metadata, extracting file information and performing duplicate removal. According to the technical scheme disclosed by the invention, the technical problem that in the prior art, data cannot be recovered or the recovery effect is poor due to the fact that the management file of the BTRFS file system is abnormal due to deletion, viruses and manual misoperation for the damaged BTRFS file system is solved.

The invention belongs to the technical field of soil sampling, and mainly relates to a soil geographic information acquisition device for territorial space planning. Comprising a base, the base is detachably provided with a supporting frame, the supporting frame is provided with a driving motor and a driving push rod, and the telescopic end of the driving push rod is rotationally connected with a transmission shaft; the inner cylinder is fixedly connected to the lower end of the transmission shaft, and first protrusions distributed at intervals are fixedly connected to the lower side of the inner cylinder; the mounting plate is connected to the transmission shaft in a sliding mode, and a first elastic piece is fixedly connected between the inner cylinder and the mounting plate; and the outer cylinder is rotationally connected to the mounting plate, and second protrusions distributed at intervals are fixedly connected to the lower side of the outer cylinder. The tree roots are fixed through the outer cylinder and the second protrusions, the moving probability of the tree roots is reduced, shearing force applied by the first protrusions fully acts on the tree roots, the tree roots cannot deflect relative to the first protrusions, and the distribution state of soil in the inner cylinder is guaranteed.

The invention discloses a carbon emission abnormity traceability method and device, a medium and equipment, and belongs to the field of carbon emission, and the method comprises the steps: receiving a traceability request containing a to-be-verified data identifier, positioning target link data from a block chain storage, and executing signature verification and Hash consistency verification, thereby guaranteeing the authenticity and consistency of the data. And if the verification of the target link data is passed, verifying the inclusion relation of Merkle tree root hash of each link upwards layer by layer to confirm the integrity of the full-chain data. And if verification failure of any level is found, the feature data of the level is combined with an anomaly detection model based on an isolated forest algorithm, and an abnormal data node is positioned. And then, according to the signature information of the abnormal data node and the preset tracking secret key, a group signature verification and private key derivation process is applied, the responsibility participant is traced, and the tracing process of the carbon emission abnormity is completed, so that the problem that the carbon emission abnormal point cannot be accurately and efficiently traced in the prior art is effectively solved.

The invention discloses an integrity verification method and device for geophysical backup data, and the method comprises the following steps: a backup node carries out the fragmentation processing of geophysical work area backup data, generates encrypted fragmented data for each piece of fragmented data through employing a homomorphic encryption algorithm, calculates the Hash value of the encrypted fragmented data to construct a Merkel tree, and carries out the verification of the integrity of the encrypted fragmented data; encrypting and storing the Merkel tree root in a backup node; during verification, a verification node calculates an encryption value of fragmentation data through a fragmentation encryption value under a current timestamp and an encryption value of the current timestamp, calculates a hash value corresponding to the encryption value of the fragmentation data, obtains an adjacent branch of a branch corresponding to the fragmentation from a Merkel tree, calculates a root node through a path of the adjacent branch of the Merkel tree, and sends the root node to the verification node. And comparing with the root node stored by the backup node to verify the integrity. According to the method, the homomorphic encryption and the Merkel tree structure are combined, so that the integrity verification efficiency can be improved while the data privacy security is ensured.

The invention relates to the technical field of construction measurement, and discloses highway tunnel construction settlement measurement equipment and a highway tunnel construction settlement measurement method.The highway tunnel construction settlement measurement equipment comprises a long insertion rod; a positioning mechanism; the root-shaped extension structures in the extended state are used for expanding the contact area of the combination of the long insertion rods and the soil; the plurality of anti-blocking mechanisms are respectively arranged at the openings of the corresponding root-shaped extension structures, and when the anti-blocking mechanisms are in an expansion state, the anti-blocking mechanisms are in contact with the outer walls of the root-shaped extension structures; a plurality of telescopic root-shaped extension structures are additionally arranged on the long insertion rod, after the long insertion rod is inserted into the ground by a set depth, the multiple root-shaped extension structures are driven to extend in multiple directions in the ground through external pressure, and a structure similar to a tree root shape is formed to form a strong combination state with a soil layer; the stability of the whole measuring equipment can be effectively improved, and error data are reduced.

The invention relates to the technical field of digging, in particular to nursery stock digging equipment with a root protection function, and solves the problems that a part of tree roots of nursery stocks can be cut off during digging of the nursery stocks, the nursery stocks are likely to die due to damaged tree roots in the subsequent planting process, soil balls located at the roots of the tree roots are prevented from being scattered, and the digging efficiency is high. The problem that the shipment efficiency of the nursery stocks is delayed due to the fact that the nursery stocks need to be bound manually subsequently and the operation is tedious is solved. Comprising a planting land, and fraxinus mandshurica seedlings are arranged on one side of the upper end face of the planting land. By means of the device, a rooting agent can be automatically sprayed on the outer surface of a fraxinus mandshurica sapling root soil ball, so that production of the surface of a cut root system is promoted, the two sides of the outer surface of the soil ball can be automatically and directly covered with two to-be-combined arc-shaped root soil wrapping shells through the sapling root wrapping mechanism, the soil ball is wrapped, and the yield of the sapling is improved. By means of the technical scheme, the protection performance of the device on the roots of fraxinus mandshurica saplings is enhanced while the functionality of the device is increased.

The utility model discloses a wind-resistant support for green orange fruit tree planting, and relates to the technical field of fruit tree planting appliances, the wind-resistant support comprises a bandage sleeved on a tree trunk and a plurality of mounting sleeves sleeved outside the bandage, a support rod is inserted in each mounting sleeve, the support rods are connected with the mounting sleeves through bolts I, each support rod is arc-shaped, the circle center of each support rod faces the root of the tree, and the support rods are connected with the mounting sleeves through bolts II. And a counterweight piece is arranged on the supporting rod. According to the utility model, the arc-shaped supporting rod is matched with the counterweight piece, so that the grabbing force of the supporting rod to the ground is improved on the basis of forming a triangular shape, and therefore, the propping force of the supporting rod to a tree trunk is improved, and the blowing force of fierce wind is better resisted.

The utility model relates to the technical field of seedling root humidifying, and discloses a root humidifying device for planting hickory saplings, which solves the problems that the existing root humidifying device for planting hickory saplings is poor in humidifying effect and affects the survival rate of the saplings. According to the sapling planting device, water mist is sprayed to the roots of saplings through the spraying cover, the motor drives the gear to rotate, meanwhile, under the cooperation of the sliding block and the sliding groove, the movable base slides around the outer portion of the containing plate, the saplings can be placed in the containing cylinder, and therefore the saplings can be planted in the containing cylinder, and the saplings can be planted in the sapling planting device. The movable base drives the spraying cover to move around the placing plate, then all-directional spraying humidification is conducted on tree roots, the survival rate of the saplings is increased, compared with direct spraying of a water pipe, water mist does not scatter soil while wetting the saplings, in the transportation process, the saplings absorb water for a long time, and the activity of the saplings is guaranteed.

The tree fertilizing device comprises a direction adjusting mechanism and a liquid storage tank, the direction adjusting mechanism is arranged on the side face of the liquid storage tank and connected to the top of the liquid storage tank, moving wheels are symmetrically arranged at the lower end of the liquid storage tank, and push rods are symmetrically arranged on the side, away from the direction adjusting mechanism, of the liquid storage tank. The direction adjusting mechanism is additionally arranged, the driving mechanism is used for controlling the rack to ascend and descend, the rack controls the spraying pipe to rotate through the gear, adjusts the orientation of the spraying pipe and confirms that the spraying pipe faces the roots of trees on the two sides, precise fertilization is achieved, waste of fertilizer, liquid medicine and the like is avoided, the cost of the fertilizer and the liquid medicine is saved, and the device is suitable for large-range tree fertilization. The production efficiency is remarkably improved, and the problem that the use efficiency is low when tree roots are fertilized in the background technology is solved.

The invention discloses a digital certificate implementation method based on a Merkel tree, and belongs to the technical field of digital certificates.The digital certificate implementation method comprises a certificate generation scheme and a certificate signature validity verification scheme, and the certificate generation scheme comprises the following steps that 1, a terminal generates a certificate request; step 2, the terminal submits a certificate request to a CA mechanism; step 3, the CA constructs a digital certificate TBSCertifiate (TBSCertifiate); 4, the CA signs the TBSCertifiate constructed in the construction step, and a signature value S is obtained; 5, the CA sends the signature value S to a signature storage service system; step 6, waiting for the signature storage service system to return, wherein the return value comprises: (1) a signature hash value generated by the signature storage system; (2) signing an authentication path generated by the storage system; and (3) signing the Merkel tree root hash value generated by the storage system. According to the digital certificate implementation method based on the Merkel tree, the certificate signature value is stored to the third-party system based on the signature storage system and the Merkel tree structure, and the certificate size is greatly reduced.

The invention discloses a complex microbial inoculant containing streptomyces elongisporus and trichoderma Guizhou, the streptomyces elongisporus is streptomyces elongisporus A25, and the trichoderma Guizhou is trichoderma Guizhou NJAU4742. The invention further discloses application of the complex microbial inoculant to promotion of cucumber growth and application to promotion of seedless litchi yield improvement and fruit quality improvement. Streptomyces elongisporus A25 and trichoderma Guizhou NJAU4742 which are separated and screened from seedless litchi tree rhizosphere soil are prepared into the composite microbial agent, the composite microbial agent is applied to a cucumber pot experiment, cucumber growth can be remarkably promoted, and when the composite microbial agent is applied to a seedless litchi field experiment, seedless litchi yield improvement and fruit quality improvement can be remarkably promoted. The complex microbial inoculant disclosed by the invention has important significance on sustainable development of the seedless litchi industry.

The invention discloses a bionic cross plate tubular pile with the outer wall imitating snake scales, the inner wall imitating tree roots and the bottom end imitating tooth roots and a manufacturing method of the bionic cross plate tubular pile. The bionic cross plate tubular pile comprises a cylindrical tubular pile body, cross plates and tooth root imitating structures. The outer wall of the cylindrical pipe pile is provided with a plurality of snake-scale-imitated protruding structures, and the inner wall of the cylindrical pipe pile is provided with a plurality of tree-root-imitated protruding structures. The cross plate is arranged in the cylindrical pipe pile and divides a circular cavity in the cylindrical pipe pile into four first fan-shaped cavities; the tooth root imitating structure is arranged at the bottom end of the cylindrical pipe pile. According to the invention, the inertia moment of the pile body, the pile end resistance, the pile side friction resistance and the pulling resistance are synergistically enhanced through multiple bionic designs, so that the comprehensive bearing capacity of the tubular pile under the combined action of vertical and horizontal loads is remarkably improved, and a novel solution is provided for pile foundation engineering under complex load and geological conditions.

The invention discloses an ancient tree health state monitoring method based on digital twinning, and relates to the field of ancient tree health monitoring, and the method comprises the steps: collecting point cloud data and texture data of an ancient tree, and constructing an initial three-dimensional model of the ancient tree; a micro ion selective electrode array is deployed in an ancient tree root distribution area, Ca2 and K + ion flow velocity changes are detected through a constant potential rectifier, and the mycorrhizal symbiosis index is calculated in combination with soil temperature and humidity data; uploading the mycorrhizal symbiosis index to a digital twinborn body, and displaying the active state of a root system area in an initial three-dimensional model of the ancient tree in a three-dimensional thermodynamic diagram form; a 16-channel MOX gas sensor electronic nose array is installed on the surface of a trunk of an ancient tree, and volatile organic compound (VOC) concentration data of the ancient tree are collected. According to the invention, a micro electrode array with a 45-degree inclination angle is adopted to non-destructively monitor the ion flow velocity of a root system through the mycorrhizal symbiosis index detection unit, and a three-dimensional thermodynamic diagram is generated in combination with an inverse distance weighted interpolation algorithm, so that dynamic visualization of underground mycorrhizal activity is realized.

The invention relates to the technical field of garden seedling culture, in particular to a seedling culture device for forest and grass resource protection, which comprises a base, lifters are mounted on the front side and the rear side of the upper surface of the base, a driving mechanism is mounted on the upper surface of the base, the lifters are pushed by the driving mechanism to realize lifting, and moving mechanisms are mounted at the tops of the lifters. A soil loosening mechanism is mounted at the top of the moving mechanism. Fertilization is triggered through pressure, it is ensured that nutrients accurately act on a root system area, waste and loss of traditional broadcast fertilization are reduced, the fertilizer utilization efficiency is improved, and the depth of a vibrating bar penetrating into the soil dynamically becomes small along with growth of the root system; shallow soil is guaranteed to be continuously loose to adapt to growth of new roots, deep root systems are prevented from being directly touched and damaged by the vibrating rod, rhizosphere soil and beneficial microorganisms are reserved to the maximum extent, and the survival rate of transplanted trees is remarkably increased.

Soil conduits are constructed between tree pits in an urban environment. These soil conduits extend upward to the surface, are covered by grates, and are permeable to allow the seepage of water and nutrients to tree roots in the tree pits. The soil conduits include, from the surface moving downward, mulch, horticultural soil, a fabric barrier, and crushed stone. The horticultural soil is inoculated with mycorrhizal fungus that creates fungal networks between the roots of various trees, communicating water and nutrients between the roots of the connected trees. These fungal networks increase the health, carbon dioxide consumption and oxygen production of urban trees. Various planting schemes could be employed such as using trees and bushes to create a common mycorrhizal network (CMN) which is associated with arbuscular mycorrhizae (AM), using plants that associate with ectomycorrhizae (ECM), or using plants associated with both types of fungus networks.

The invention provides a tree root system and soil dielectric constant ground penetrating radar inversion method, and belongs to the field of electromagnetic inverse scattering imaging and geophysical exploration. The method comprises the following steps: acquiring an electrical parameter distribution image; acquiring a ground penetrating radar simulation echo image; constructing a medium edge extraction auxiliary task according to the preprocessed ground penetrating radar simulation echo image and a medium edge extraction auxiliary task training label, and constructing a dielectric constant inversion main task according to the preprocessed ground penetrating radar simulation echo image and a dielectric constant inversion main task training label; and carrying out joint training on the dielectric constant inversion main task and the medium edge extraction auxiliary task, and constructing a tree root system and layered non-uniform soil dielectric constant inversion model. The boundary of the electrical parameter distribution image is identified through the auxiliary task, the attention of the model to the non-uniform structure details in the ground penetrating radar simulation echo image is increased, and the capacity of the model for outputting the underground root system and the soil dielectric constant is improved.

The invention provides a multipurpose forestry fruit nursery stock transplanting device which comprises a main rack, C-shaped frames, T-shaped rods, a fixed module, a movable module and a knife rest, a lifting plate frame is slidably assembled on the main rack, the C-shaped frames are movably assembled on the two sides of the lifting plate frame, a plurality of connecting hole positions are formed in the C-shaped frames, the T-shaped rods are slidably inserted into the C-shaped frames, and the fixed module is movably assembled on the movable module. A T-shaped rod is arranged on two groups of C-shaped frames which can be opened and closed, the T-shaped rod, the movable module and the digging knife are movable, the movable module is arranged on one side of the fixed module in a sliding mode, a knife rest is rotatably installed on the movable module, the digging knife is assembled on the knife rest in a sliding mode along the guide rail, and the movable module and the knife rest are both connected with the T-shaped rod in a linkage mode. A transplanted tree trunk can be automatically positioned in the clamping process, the manual adjustment process is omitted, the cutting position and the cutting angle of the digging cutter can be automatically adjusted according to the diameter of a fruit tree nursery stock, and the completeness of a tree root system in the transplanting process is ensured.

The embodiment of the invention relates to the technical field of data processing, in particular to a verifiable cross-domain query method and device, equipment and a storage medium, and aims at achieving verifiable cross-domain query compatible with multiple query modes. The method comprises the steps that according to a query condition in a received query statement, a corresponding query tree is determined, the query tree at least comprises an Id tree, a commitment tree, a dictionary tree and a range query tree, and a root node hash value of the query tree stores a backup in a block chain; obtaining a corresponding query result according to the query tree and the query condition; and sending the query result and proof content generated in the query process to a query party, so that the query party reconstructs a tree root node hash value of the query tree according to the proof content and the query result, and compares the tree root node hash value with a tree root node hash value corresponding to the query tree stored on the block chain, and determining whether the query result is correct or not.

A method for implementing layer 2 network rollup. An executor and prover of a layer 2 network are implemented by adopting a trusted execution environment. The method comprises: a sequencer of a layer 2 network pulls transactions from a transaction pool, sequences and packages the transactions, reads to the prover an SPV proof of an initial state / read set before execution of a packaged transaction, and sends the initial state / read set and the packaged transaction to an executor; on the basis of the initial state / read set, the executor executes the packaged transaction, adopts a private key of the executor to generate a first signature for a generated write set, and sends the write set and the first signature to a prover; after the prover verifies that the first signature passes, on the basis of the SPV of the initial state / read set, the prover constructs a Merkle tree and uses a tree root as a pre-state root, updates the write set to a leaf node of the Merkle tree, and updates a Merkle root and uses the Merkle root as a post-state root; and the prover adopts a private key of the prover to generate a second signature for the pre-state root and the post-state root, uses the second signature as a proof, and sends the second signature along with the pre-state root and the post-state root to a rollup contract on the mainnet by means of a second mainnet transaction.

The present disclosure provides a novel tree root machine, which includes a machine frame with a push handle, and driven walking wheels and a driving wheel which are rotatably connected to the machine frame. A driving device in transmission connection with the driving wheel is arranged on the machine frame for driving the driving wheel to rotate. The ground contact surface of the driving wheel and the ground contact surfaces of the driven walking wheels are not coplanar, and the position of the driving wheel is higher than that of the driven walking wheel when the push handle is in a raised state. The driving wheel and the driven walking wheels touch the ground together when the push handle is in a lowered state, and then the machine frame is driven to move.