15results about How to "Reduce storage size" patented technology

The invention provides a synchronous zero voltage modulation system and method of a cascade system, a medium and equipment wherein the synchronous zero voltage modulation system of the cascade system comprises a power circuit module and a modulation system; the power circuit module comprises a front-stage four-switch buck-boost converter and a rear-stage LCC-LCC compensated bidirectional wireless charging system; the modulation system comprises a voltage compensation module, a current compensation module, a current comparison module, a synchronization module and a switch driving signal generation module, the output end of the voltage compensation module is connected with the input end of the synchronization module, and the output end of the current compensation module is connected with the input end of the synchronization module. The output end of the current comparison module is connected with the input end of the synchronization module, and the output end of the synchronization module is connected with the driving signal generation module. According to the invention, a plurality of time scales are adopted, the implementation condition of synchronous zero-voltage switch modulation is accurately calculated, the calculation speed is high, the memory occupation amount is small, and the zero-voltage switch synchronous modulation of the cascade system is realized.

The invention discloses a wheel folding and unfolding mechanism applied to a power-assisted tractor and a using method. The wheel folding and unfolding mechanism comprises a chassis shell. The upper bearing is connected with the chassis shell; the folding device is arranged on the chassis shell; and the wheels are connected with the folding device. An original welding mode is upgraded into a foldable mechanism, rapid folding and storage of the power-assisted tractor are achieved, the storage size of the whole tractor is reduced, and single-person operation is facilitated. When the motor extends, the gear and the rack act to tighten the tractor, when the motor retracts, the wheels are opened, and folding storage of the power-assisted tractor is automatically achieved. And linear motion of the electric cylinder is converted into rotation of folding storage through the gear and the rack, manual operation is not needed, and only one-key folding is needed. The folding storage mechanism has the advantages that the folding storage function of the upper half vehicle and the folding function of the wheels are achieved, the overall storage size is further reduced, carrying and mounting are convenient, and the practicability and portability of the mechanism are improved.

The invention provides a model data processing method and device, and the method comprises the steps: obtaining original model data of a target model; determining repeated vertexes, deleting vertex data corresponding to the repeated vertexes to obtain de-duplicated vertex data, and performing quantization processing on the de-duplicated vertex data to obtain processed vertex data; according to the data type of the map data, compressing the map data to obtain processed map data; according to the material data, model components with the same material attribute are determined and combined, combined model components are obtained, and the material data of the combined model components serve as processed material data; and compressing and uploading the processed vertex data, the processed mapping data and the processed material data as new model data. By reducing redundant data, optimizing a data structure and adopting an efficient compression algorithm, light weight of model data is realized, so that the rendering efficiency and the transmission rate are improved.

A method for extracting key contour points of Chinese characters based on key skeleton points and stroke width belongs to the field of computer and Chinese character vectorization, which comprises the following steps: inputting a single Chinese character picture, performing pretreatment to generate a binary image; extracting the skeleton of the Chinese character by using a skeleton extraction algorithm; further extracting key skeleton points of the Chinese character; obtaining the stroke width at each key skeleton point of the Chinese character; obtaining the contour points of the Chinese character by using a contour extraction algorithm; sequentially traversing all contour points of the Chinese character, calculating the distance from the current contour point to the nearest key skeleton point, calculating the distance threshold of the current nearest key skeleton point, judging whether the current contour point is a key contour point by comparing the distance from the current contour point to the nearest key skeleton point with the distance threshold, and recording the current contour point as a key contour point if the distance is less than the distance threshold. The application effectively improves the quality of Chinese character vectorization, maintains all detail features, effectively removes noise contour points and redundant contour points, and reduces the storage space size of the vectorized Chinese characters.

The invention provides an APP installation starting method based on an Android system, a set top box terminal, a computer program product and a storage medium, and the method comprises the steps: S1, responding to a starting signal of terminal equipment, and detecting whether the current starting is the first installation starting or not; if the installation is started for the first time, a pre-configured basic application is installed, and the basic application comprises a necessary application used for running the Android system and an installation selection application used for obtaining a preset application needing to be installed by a user; s2, running the installation selection application to obtain a preset application selected by a user; s3, installing the preset application selected by the user and obtained in the step S2; and S4, running the preset application in the step S3. According to the invention, the system load can be effectively reduced, and high working efficiency and stability can still be provided when the system runs for a long time.

The utility model discloses a power distribution lighting box group for a tent hospital, which comprises a box body, a safety electricity utilization protector and a lamp, at least one side of the box body is hinged with a table top plate, and one side of the table top plate far away from the box body is hinged with table legs; the safe electricity utilization protector is arranged in the box body, and the box body is provided with a slot for fixing a lamp. The power distribution lighting box group for the tent hospital has the advantages of modularization, electric shock prevention, lightning protection, multiple functions and light weight.

The invention relates to the technical field of symmetric cryptographic algorithms, and discloses a dynamic Latin party construction method based on an S box, computer equipment, a computer readable storage medium and a computer program product in order to solve the problem that an existing Latin party occupies a large storage scale in cryptographic algorithm application. The method comprises the following steps: acquiring a dynamic control parameter, wherein the dynamic control parameter is 2 bits; a first S box, a second S box and a third S box are obtained, the first S box and the second S box are a table with one row and n-1 columns, and the third S box is a table with one row and n columns; assigning a value to the target matrix according to the first S box; performing assignment on the first Latin square according to the target matrix and the second S box; replacing the first Latin square according to the third S box to obtain a second Latin square; and taking the second Latin party as a target Latin party under the condition that the second Latin party meets a set condition. By adopting the method, the data storage scale required in the dynamic Latin party construction process is reduced, and the obtained Latin party has good cryptographic properties.

This invention provides a tube-launched rotor-wing loitering munition and its operating method, comprising a first-stage propulsion device, a deceleration parachute, a second-stage propulsion device, a multi-rotor UAV, a warhead, and a seeker. The beneficial effects of this invention are: The first-stage propulsion device provides initial velocity during launch, enabling rapid deployment. During flight, the first-stage propulsion device can be automatically jettisoned via a mechanism, reducing the weight of the loitering munition and increasing its operational time. The invention also includes a second-stage propulsion device, which further increases the flight speed of the loitering munition, extending its range and compensating for its insufficient operational distance, ensuring the munition quickly reaches a preset altitude and position. For launch-type rotor-wing loitering munitions, by rationally designing the main body structure and the arm extension and retraction structure, the retraction size is significantly reduced, meeting overload requirements and enabling tube-launching of the rotor-wing loitering munition.

This utility model provides a multi-link lifting boom and a boom lifter, belonging to the field of engineering machinery technology. The technical solution of the multi-link lifting boom includes a main boom and a folding boom, as well as a multi-link luffing mechanism. The multi-link luffing mechanism includes a first link, a second link, and a luffing cylinder. The first link has a first end and a second end, and the second link has a third end and a fourth end. The fixed end of the luffing cylinder is hinged to the main boom at a second hinge point. The movable end of the luffing cylinder is hinged to the first and third ends at a third hinge point, and the second end is hinged to the main boom at a fourth hinge point, located away from the folding boom. The fourth end is hinged to the folding boom at a fifth hinge point, located closer to the main boom. This utility model places the fourth hinge point away from the folding boom and the fifth hinge point closer to the main boom, effectively utilizing the space in the hinge area between the main boom and the folding boom, thus reducing the folded size of the boom.

The invention provides a CT (Computed Tomography) reconstruction method, system and equipment of a three-dimensional sparse view angle and a medium. The method comprises the following steps: acquiring projection data formed under a sparse view angle scanning condition and corresponding imaging geometric parameters; determining a ray path set based on the projection data, and carrying out the following processing on each ray path: generating a plurality of three-dimensional sampling point coordinates on the ray path according to imaging geometric parameters corresponding to the ray path; performing feature mapping and interpolation processing on the coordinates of the three-dimensional sampling points based on Hash coding to generate point feature vectors corresponding to the three-dimensional sampling points; inputting each point feature vector into a neural network model to obtain an attenuation coefficient corresponding to each three-dimensional sampling point; carrying out integral accumulation on the attenuation coefficient of each sampling point along the ray direction to obtain a projection result of the ray path; and generating a three-dimensional reconstructed image based on the projection result of each ray path. According to the method, high-quality and low-power-consumption three-dimensional CT reconstruction processing can be realized under the sparse view angle scanning condition.

The embodiments of this specification disclose a method, device, and server for querying and configuring entity attribute data. By treating only some entity units as leaf entity units, attribute data is stored and maintained. Other entity units inherit the attribute data corresponding to the leaf entity units to construct association relationships between entity units when storing entity attribute data, thereby completing the storage of attribute data for all entity units based on the association relationships and the attribute data of the leaf entity units. When querying and maintaining attribute data, only the attribute data of the leaf entity units need to be maintained. For non-leaf entity units, the attribute data of the corresponding leaf entity units can be retrieved through entity unit conversion to query the attribute data. This greatly reduces the storage scale of entity attribute data while further reducing the maintenance amount of entity attribute data and improving query efficiency.

The utility model discloses a bidet convenient to fold, store and clean, which comprises a bidet body and a mounting component, the bidet body is connected with the mounting component through at least one articulation piece, the articulation piece is provided with a first articulation part and a second articulation part, and the first articulation part is connected with the second articulation part. And the first hinging part and the second hinging part of the hinging piece are respectively hinged and matched with the bidet body and the mounting assembly. The bidet can be conveniently stored, and the lower portion of the bidet body can be conveniently cleaned.

The utility model discloses a table board subassembly, handrail box device and vehicle relates to vehicle technical field, wherein, table board subassembly includes table board and first support piece, and table board movable installation is in first component of vehicle, and has the far end of support of far away from first component in unfolded state and the near end of support of close to first component, and first support piece rotation is connected in far end of support, and has support position and folding position, in support position, the end of first support piece far away from far end of support is supported by the support action of second component of vehicle, in folding position, first support piece is superposed in table board, the technical scheme provided by the utility model can promote the structural stability of table board in unfolded state.

The invention provides a traceability log storage and query method based on deep embedding and single-layer RNN prediction, and relates to the technical field of traceability graph compression, and the method comprises the steps: converting a system bottom layer audit log into a traceability graph, carrying out the coding mapping of path class and identification class attribute fields through deep learning embedding representation, and obtaining a traceability graph; coding prefixes are distributed for the path type attribute fields and the identification type attribute fields through self-adaptive dictionary coding, and numerical attribute fields are recorded through incremental coding; preprocessing and learning the traceability graph through a single-layer recurrent neural network (RNN) unit; performing local adjustment on the traceability graph during data updating based on incremental coding and adaptive mapping; and mapping the query condition into an attribute coding prefix, reconstructing an attribute sequence based on the attribute coding prefix, and performing correction through the adjustment table. For redundant information and structural similarity, a deep learning embedding representation technology and an adaptive dictionary coding strategy are adopted, and shared codes of similar attribute fields are effectively learned and extracted, so that redundant data storage is reduced.