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71results about How to "Low system requirements" patented technology

Memory management for systems for generating 3-dimensional computer images

A 3-dimensional computer generated image is generated by subdividing the image into a plurality of rectangular areas. Object data for each rectangular area is loaded into a display list memory (4) until that memory is substantially full. Image data and shading data for each picture element of each rectangular area is derived by an image synthesis processor (6) from the object data. Image data is then stored in a local memory (16) and further object data loaded into the display list memory (4) and replaces the existing contents. Once this has happened, the stored image data and shading data is retrieved and additional image data and shading data derived for each picture element by the image synthesis processor (6) using the new object data and the previously derived image and shading data. When there is no further object data to load to the display list memory the shading data is provided for display for the rectangular areas by a frame buffer 11. The memory may be managed by allocating at least one block of storage from the display list memory to each rectangular area and then storing in that block of memory, data which pertains to surfaces which intersect that rectangular area. A determination is made as to when a predetermined number of blocks have been used for a rectangular area. When this number is reached, the system starts to derive shading data for the rectangular areas, thereby releasing blocks of storage to be allocated to further rectangular areas in the display list memory.
Owner:IMAGINATION TECH LTD

Industrial wireless sensor network communication method based on relay nodes

The invention relates to an industrial wireless sensor network communication method based on relay nodes, belonging to the field of sensor network communication. A network management center distributes a preferred communication path resource according to the request of a source node and current network state information, selects a relay node and a relay path according to constraint conditions, and distributes the communication resources of the relay path. In the communication process, when the relay node receives the negative response from the node of the last hop, the probability that the transmission delay exceeds a threshold is reduced, the frequency of retransmission initiated by the source node is reduced, and the energy consumption for retransmitting data is reduced. Meanwhile, the relay node also dynamically changes the priority of data packets, avoids delaying transmission of the data packets again, and ensures that the data packets reach a destination node in delay requirements. By adopting collaboration among the relay node, the destination node and the network management center, the packet loss rate is reduced, the frequency of retransmission initiated by the source node is reduced, and the energy consumption for retransmitting data is reduced.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Portable touch interactive system based on image processing technology

The invention relates to a portable touch interactive system based on an image processing technology and is used for performing human-machine interaction on an interactive carrier. The portable touch interactive system comprises a projector, a camera, a processing center and a steering engine holder, wherein the processing center is respectively connected with the projector, the camera and the steering engine holder; the steering engine holder is connected with the projector and the camera respectively, tracks the interactive carrier, controls the projector to project an interactive interface on the interactive carrier, and simultaneously controls the shooting angle of the camera; the camera shoots the human-machine interaction process and sends images to the processing center; and the processing center preprocesses the received images and recognizing gestures of a person by a fingertip recognition algorithm. The steering engine holder tracts the interactive carrier, and fingertips are recognized by the novel fingertip recognition algorithm, so that compared with the prior art, the portable touch interactive system has the advantages that the portable touch interactive system is portable, high in recognition rate, easy to implement and convenient to configure.
Owner:TONGJI UNIV

Urban fire disaster monitoring system based on the Internet of Things architecture and WebGIS

The invention discloses an urban fire disaster monitoring system based on the Internet of Things architecture and the WebGIS, and belongs to the field of environmental monitoring. The urban fire disaster monitoring system comprises a sensor node, a gateway coordinating node, a server and a client side. The sensor node comprises a humiture sensor and a wireless transmission module, and is used for measuring humiture data and sending the data to the gateway coordinating node, or is regarded as a routing node to forward the data. The gateway coordinating node comprises a wireless transmission module and a GPRS communication module, and is used for receiving and analyzing data of a child node and sending the data to the server. The server comprises a Web server, a GIS server and a database server, and is used for analyzing and processing the data of the sensor and generating an urban fire risk level model map which comprises a fire risk level and positional information. The client side is used for remote detection, prevention and positioning on fire risk data, setting of remote parameters and the like. The system construction cost is low, network nodes can be rapidly expanded, and remote monitoring, predicting and positioning on urban fire disasters of different areas in a network are achieved.
Owner:HOHAI UNIV

Closed type compressed air and low-pressure water premixing self-rotating water mist fire extinguishing device

The invention provides a closed type compressed air and low-pressure water premixing self-rotating water mist fire extinguishing device. The fire extinguishing device comprises an air and water mixing fixed pipe, a compressed air pipeline, a water supply pipeline, air and water automatic control valves, a compressed air and water premixer, an automatic rotating shell, a rotating sealing component, a plurality of L-shaped bent spray rods and a plurality of open type compressed air and water nozzles, wherein the air and water automatic control valves are arranged on the compressed air pipeline and the water supply pipeline and are connected with an air inlet pipe and a water inlet pipe of the compressed air and water premixer, and trial air release valves and closed type nozzles are arranged on the air and water automatic control valves; the outlet end of the compressed air and water premixer is connected with the automatic rotating shell through the air and water mixing fixed pipe; the plurality of L-shaped bent spray rods are arranged on the automatic rotating shell; and the compressed air and water nozzles are arranged at the bottom end of the automatic rotating shell and the L-shaped bent spray rods. The requirement on a system is lowered. Normal fire extinguishing water, namely low-pressure water, is supplied by a water supply system, but the hole diameter of the compressed air and water nozzles is increased, so that the compressed air and water nozzles cannot be easily blocked, and the requirement on water quality is lowered. Compared with the existing high-pressure water mists, water mists produced by the device have the advantages that the sizes of the water mists are smaller and more uniform, the effective acting range is larger, and the fire extinguishing effect is better.
Owner:JIANGSU UNIV

Method and device for obtaining eigenstate of quantum system, equipment, medium and product

ActiveCN113935491AReduce initial state and system requirementsLower requirementQuantum computersKnowledge based modelsQuantum dynamicsQuantum electrodynamics
The invention discloses a method and device for obtaining eigenstate of a quantum system, equipment, a medium and a product, and relates to the technical field of quantum. The method comprises the steps of obtaining a circuit generation state of a target quantum system in an evolution process of the target quantum system; updating hamiltonian operator parameters in quantum dynamics expression by taking the minimum eigenstate as a target, wherein the quantum dynamics expression is dynamics expression based on quantum virtual time, and Hamiltonian operators are controlled; and circularly updating the Hamiltonian operator parameter and the circuit parameter until the minimum eigenstate is obtained. Quantum virtual time evolution and quantum real time control theories are combined, and the two mechanisms are analyzed, so that a set of control method which can be implemented on virtual time evolution is provided, the requirements on an initial state and a system are reduced, the requirement on control capability is also reduced, elastic selection is achieved, and meanwhile, a strategy of large-amplitude acceleration can be provided, and the convergence process is accelerated as much as possible or the requirement on the initial state is reduced in the controllable state.
Owner:TENCENT TECH (SHENZHEN) CO LTD

Frequency control circuit, method and device and ultrasonic transducer system

The invention relates to a frequency control circuit, method and device and an ultrasonic transducer system; the frequency control circuit comprises a data acquisition unit connected with the output end of the excitation signal source and a processing unit connected with the data acquisition unit, and the processing unit is connected with the excitation signal source; the data acquisition unit isused for synchronously sampling the current and voltage output by the excitation signal source and transmitting the obtained current data and voltage data to the processing unit; the processing unit is used for performing FFT processing on the current data and the voltage data to obtain a data processing result, wherein the data processing result comprises a phase difference between the current and the voltage; and the processing unit is also used for comparing the phase difference with a preset phase difference and adjusting the driving frequency of the excitation signal in the excitation signal source according to a comparison result so as to match the resonant frequency of the ultrasonic transducer. According to the invention, the frequency of the excitation signal can be accurately adjusted in real time, the system requirement is reduced, the cost is saved, the structure is simple, and implementation is easy.
Owner:CHONGQING XISHAN SCI & TECH

Modular primary permanent magnet bilateral switched reluctance linear motor

The invention discloses a modular primary permanent magnet bilateral switched reluctance linear motor. The primary side of the motor is modularized. Each primary module is composed of a magnetically permeable material, an armature winding and permanent magnets distributed in the vertical direction between two magnetic conducting blocks. The secondary side is composed of a magnetically permeable material. The permanent magnets are magnetized in parallel. The permanent magnets corresponding to the adjacent primary modules have the same magnetization direction. The upper and lower corresponding permanent magnets belonging to the same primary module have opposite magnetization directions. In a no-load state, a permanent magnet magnetic circuit is short-circuited by the primary magnetic conducting blocks, and the magnetic force lines hardly pass through an air gap and the secondary side, which reduces the positioning force. In a loaded state, a series magnetic circuit is formed between theprimary magnetic conducting blocks and the bilateral secondary side to generate electromagnetic force. In addition, the modular primary permanent magnet bilateral switched reluctance linear motor hasa simple secondary-side structure and large thrust density, and the permanent magnets are placed in the short primary side to reduce the cost of the motor. The modular primary permanent magnet bilateral switched reluctance linear motor can be applied to long secondary-side occasions such as an elevator driving system.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Powertrain for Hybrid Electrical Vehicle

The invention relates to a powertrain for a hybrid electrical vehicle, comprising an engine, a first motor, a second motor and a transmission device, said transmission device having a planet gear set with double planet gear ranks comprising a first planet gear rank and a second planet gear rank, said engine is arranged on one side of said planet gear set, said first motor and said second motor are arranged on the other side of the planet gear set, said first planet gear rank comprises a small sun gear, a planet carrier, a short planet gear and an outer ring gear, said second planet gear rank comprises a big sun gear, a long planet gear and the planet carrier shared with the first planet gear rank, said long planet gear meshes with the short planet gear and the big sun gear respectively.
Owner:CORUN CHS TECH CO LTD
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