45 results about "Parallel dynamics" patented technology

One embodiment of the present invention sets forth a technique for dynamically allocating memory using a nested hierarchical heap. A lock-free mechanism is used to access to a hierarchical heap data structure for allocating and deallocating memory from the heap. The heap is organized as a series of levels of fixed-size blocks, where all blocks at given level are the same size. At each lower level of the hierarchy, a collection of N blocks in the lower level equals the size of a single block at the level above. When a thread requests an allocation, one or more blocks at only one level are allocated to the thread. When threads are finished using an allocation, each thread deallocates the respective allocated blocks. When all of the blocks for a level have been deallocated, defragmentation is performed at that level.

One embodiment of the present invention sets forth a technique for dynamically allocating memory using one or more lock-free FIFOs. One or more lock-free FIFOs are populated with FIFO nodes, where each FIFO node represents a memory allocation of a predetermined size. Each particular lock-free FIFO includes memory allocations of a single size. Different lock-free FIFOs may include memory allocations for different sizes to service allocation requests for different size memory allocations. A lock-free mechanism is used to pop FIFO nodes from the FIFO. The use of the lock-free FIFO allows multiple consumers to simultaneously attempt to pop the head FIFO node without first obtaining a lock to ensure exclusive access of the FIFO.

The invention discloses a synchrony relation based parallel dynamic data race detection system which comprises a filter module, a recording module, a vector clock computation module and a parallel detection module. The filter module is responsible for monitoring memory access operation of each thread of a to-be-detected program in the running process and filtering redundant memory accesses and accesses with data races impossibly occurring, and rest accesses after filtration are written in record files corresponding to the threads by the recording module. The vector clock computation module reads out the memory access records of the program from the record files, and computes vector clocks of the memory accesses. The parallel detection module partitions a detection task by the vector clocks into small tasks to be distributed to multiple worker threads, and is responsible for summarizing detection results. The system only records the memory accesses with the races possibly occurring and merges and compresses access intervals, so that the records are greatly decreased; meanwhile, a data race detection algorithm is high in degree of parallelism, and multi-core hardware can be fully utilized to realize detection acceleration.

A 3-dimensional MEMS accelerometer fabricated on a single planar substrate deploys three co-planar sensor elements. Each sensor element is a capacitive device deploying a static electrode plate and a parallel dynamic electrode plate supported by a torsion beam. The dynamic electrode plate also includes a proof mass portion that displaces the center of gravity to below the plane of the plate. Two of the sensor elements are identical and rotated by 90 degrees on the planar substrate. The third capacitive sensor has two pairs of adjacent capacitive plates, each one having a dynamic electrode plate is suspended by a torsion beam. The proof mass on each dynamic electrode plates however is offset laterally from the torsion axis in opposite directions from the other plates to cancel the their respective capacitance charges induced by in-plane acceleration. However, this arrangement also adds the capacitive change induced by acceleration orthogonal to the planar substrate.

This disclosure is directed to a novel arrangement for equipment used to compress fluids. A single prime mover is connected to a plurality of compressors. A supply conduit with parallel branch conduits directs fluid to be compressed to at least two compressors and parallel output conduits from each compressor are connected to a common output conduit, which directs compressed fluids to at least one additional compressor.

With regard to the problem of frequency response and power allocation unreasonableness during the transient process caused by parameter design unreasonableness of a parallel running virtual synchronous power generator in a micro power grid, the invention proposes an inertia damping matching mechanism of a multi-machine parallel virtual synchronous power generator (VSG). The power allocation is controlled, and meanwhile, stable transient transition (relatively low oscillation amplitude and period) of power generators running in parallel and having different capacities is ensured. A PI regulator-based improved damping control method is creatively proposed. All VSGs can work with the same damping coefficient value under a modification method, so that calculation is reduced. In VSG parallel running, the selection of inertia and damping coefficient shall consider the dynamic characteristics of a system frequency and parallel power of the VSG, and the parameters are capacity functions of theVSG; and according to a matching principle, the steady-state and transient process can be optimized, so that stable support can be provided for a large amount of distributed power supplies connectedto the micro power grid and an intelligent power grid.

The present invention provides a parallel current-sharing device and control method without a current-sharing bus, for implementing parallel current sharing of direct-current outputs of a plurality of power conversion submodules. The parallel current-sharing device comprises a voltage control module and a plurality of power conversion submodules. The voltage control module and the plurality of power conversion submodules having parallel outputs form an outer voltage loop. The power conversion submodules comprise respective inner current loops and sample respective current feedback signals to generate inner current loop control signals, and the inner current loop control signals are superposed with an outer voltage loop control signal to control output of the power conversion submodules. An independent current bus is not required, and only one unidirectional outer control voltage loop is required. Functions the same as those of a conventional device are realized; the design, production and debugging of circuits of the parallel current-sharing device are simpler; a rapid multi-parallel dynamic response is realized; a ground wire loop current is eliminated, improving the anti-interference capability of the device; and multi-module parallel current sharing of a switching power supply or a linear power supply under analog control or digital control is realized very easily.

The invention relates to a six-degree-of-freedom parallel dynamic platform. The six-degree-of-freedom parallel dynamic platform comprises a display device (1), an operation platform (5), an upper platform (3), an execution mechanism (32), a lower platform (21) and a control system (33); the display device (1) and the operation platform (5) are respectively arranged on the upper platform (3); two ends of the execution mechanism (32) are respectively fixed on the upper platform (3) and the lower platform (21); and the control system (33) is located in the lower platform (21). With the six-degree-of-freedom parallel dynamic platform of the invention adopted, defects in the prior art can be eliminated, and simulation experience of an operator and the reliability of the mechanism can be enhanced, and up-and-down, left-and-right and front-and-back translation and rotation can be realized. The six-degree-of-freedom parallel dynamic platform has the advantages of stable movement and convenient operation, and can bearing a large load.

The invention discloses a multi-dimensional parallel dynamic platform for a flight simulator. The flight simulator is composed of a PC, a visual system, a dynamic platform and a cabin. The dynamic platform comprises a planar motion platform and a six-freedom-degree motion platform. The planar motion platform is used for simulatinga translation motion sensing of a planar line or a curve and enables the six-freedom-degree motion platform arranged on the planar motion platform to simulate translation motion sensing of a planar line or a curve. The six-freedom-degree motion platform is used for simulating six-freedom-degree motion sensing and enables the cabin arranged on the six-freedom-degree motion platform to simulate the six-freedom-degree motion sensing. The cabin is arranged on the top of the motion platform. According to the invention, lamination of various motion ways can be realized perfectly and a multi-dimensional flight motion simulation effect also can be realized; and simulation flight experience of a user can be enhanced substantially. The provided multi-dimensional parallel dynamic platform can be applied to the flight simulator field widely.

The invention discloses a magnetic chain coupling type memristor analog circuit with an adjustable coupling coefficient. The magnetic chain coupling type memristor analog circuit comprises two memristor simulators and a coupling resistor, wherein the memristor simulator is a magnetic chain control type memristor simulator, and the coupling resistor is a sliding resistor with continuously smooth adjustable level; and each memristor simulator comprises two suspension interfaces and at least one coupling interface, and access a variable directly proportional to an equivalent magnetic chain signal square value of the other memristor simulator through the coupling interface. The magnetic chain coupling type memristor analog circuit can not only express the dynamics and stable state properties of the single memristor, but also can simulate the magnetic chain coupling relation between more than two memristors, so as to research the magnetic chain coupling type memristor analog circuit from experiments and the characteristics of a series parallel dynamic circuit of other circuit elements; and the magnetic chain coupling type memristor analog circuit can be easily expanded to a multi-magnetic chain coupling type memristor analog circuit to replace the common resistors for application in the design and development of non-volatile memorys, neural network feedback systems and logic operation and other novel circuits and function circuits.

The invention provides a parallel dynamic stiffness experiment table. The parallel dynamic stiffness experiment table comprises an installation base, a force sensor, a supporting block, a parallel type clamp, a connecting piece, a vibration exciter and an acceleration sensor device. The whole parallel dynamic stiffness experiment table is installed in a suspended mode. The installation base is used for connecting the whole experiment table to a pressure testing machine. The installation base is provided with the force sensor connected with one end of the supporting block, the other end of the supporting block is connected with the parallel type clamp, the parallel type clamp is of a U-shaped structure and comprises two clamping parts, a reinforcing rib plate is welded into the parallel type clamp, the whole parallel type clamp is made of steel and can clamp two rubber tested pieces at the same time, the installation direction of the parallel type clamp can be changed, the connecting piece is arranged between the two clamping parts, and the two clamping parts are connected with the vibration exciter and the acceleration sensor device through the connecting piece. The parallel dynamic stiffness experiment table is reasonable in structural design, low in manufacturing cost and good in detecting effect.

The invention discloses an anti-counterfeiting film. The anti-counterfeiting film comprises a graphics layer, a transparent basement membrane and a micro lens array layer, wherein the graphics layer and the micro lens array layer are respectively arranged on two opposite surfaces of the transparent basement membrane; the graphics layer comprises a plurality of subunit patterns which are distributed in an array, the subunit pattern of the graphics layer and the region structure uncovered by the subunit pattern are a holographic sketch grating structure or a plane structure, and the subunit pattern is different from the region structure uncovered by the subunit pattern; the micro lens array layer comprises a plurality of micro lenses distributed in the array, and the micro lens of the micro lens array layer is corresponding to the subunit pattern of the graphics layer. Merle amplification images and texts can be imaged by the anti-counterfeiting film; the anti-counterfeiting film has the vertical dynamics, parallel dynamics, floating, sinking, three-dimensional and multichannel effects, and the anti-counterfeiting effect is obvious. The micro lens of the anti-counterfeiting film and the subunit pattern belong to a micron-sized structure and are high in the matching degree, thus the anti-counterfeiting film is more exquisite, high in technical threshold, more difficult to counterfeit and strong in anti-counterfeiting ability.

The present invention relates to a six degrees of freedom parallel dynamic platform. The platform comprises a display device, an operation platform, an upper platform, an execution mechanism, a lower platform and a control system. The ultra narrow frame display screen of the display device is installed on the upper platform, and the operation platform is installed on the upper platform; the upper platform and the lower platform are respectively arranged at two ends of the execution mechanism; and the control system is installed on the lower platform. The structure is compact, the work flexibility is reliable, and the size of the whole size is greatly reduced on the premise of ensuring the operator's immersion and multi perceives; the operator can select a display mode according to habits or real conditions; the six degrees of freedom parallel dynamic platform can be applicable to the operation of different population and enhance the man-machine interaction; and the weight of the platform is light, and the manufacturing cost is low.

The invention discloses a hybrid parallel dynamic equivalence method for small and medium-sized hydroelectric generator groups, and relates to the field of modeling and analyzing of hydroelectric generator groups in a power system. The method comprises a coherency-based equivalence step and an equivalence identification step, wherein the coherency-based equivalence step comprises the steps as follows: coherent generator groups are obtained through coherency identification, and parameters of a network structure, a busbar, an equivalent load and a tie line are obtained through network reduction; and the equivalence identification step comprises the steps as follows: boundary flow matching is achieved by a virtual load identification technology, and model parameters of equivalent generators are identified by a parallel particle swarm optimization algorithm. Introduction of hybrid equivalence and parallel optimization technologies, the equivalent precision and efficiency of the small and medium-sized hydroelectric generator groups are effectively improved. The equivalent model obtained by the method can meet the refined modeling requirements of hydropower energy system simulation, power system analysis and dispatching operation calculation.

The invention relates to a server, a blockchain attesting decoding method and a storage medium. The method comprises the steps of after a business block of blockchain sorting node packaging is received, analyzing the business block to obtain all businesses in the business block; obtaining current business request second flow, current load condition information of a CPU of the server and a preset processing value, establishing multiple threads based on the current business request second flow, the current load condition information and the preset processing value, and distributing the businesses to the CPU to be subjected to dynamic parallel attesting decoding based on the established threads; after attesting decoding, collecting the businesses after attesting decoding in the threads, and submitting the businesses after the businesses after attesting decoding are subjected to multi-version examination and business persistent processing. Through the server, the blockchain attesting decoding method and the storage medium, the businesses are subjected to parallel dynamic attesting decoding through the threads, the bottleneck of business submitting is eliminated, and the business processing speed and server performance are improved.

The invention relates to a dynamic load balancing method based on an SDN. The method comprises the following steps: finding an optimal path from a source host to a destination host; and setting a dynamic load balancing threshold for a system, when detecting that a load balancing parameter exceeds the dynamic load balancing threshold, triggering a parallel dynamic scheduling strategy to perform dynamic adjustment on the load, and scheduling partial data streams on a node with a smaller load, otherwise, transmitting the entire data streams in the optimal path. The dynamic load balancing method based on the SDN provided by the invention can improve the stability of the whole system and the optimization of route selection, and improve the utilization ratio of a whole link.

The invention provides a commodity parallel dynamic pushing method in an e-commerce platform. The method comprises the following steps that: firstly, a server constructs a client matrix, a commodity attribute matrix and a scoring matrix by adopting a distributed parallel mode of a message passing interface (MPI): each slave process constructs a client block matrix in a distributed database in parallel, and a master process merges the block matrixes constructed by each slave process into a complete matrix; secondly, the clients are clustered in a parallel mode based on MPI; the master process executes a particle swarm optimization algorithm to obtain the optimal cluster number required by customer clustering, the slave processes execute a k-means clustering algorithm in parallel, and when the k-means clustering algorithm is executed, each slave process allocates a plurality of threads to calculate the Euclidean distance between a customer vector and a mean vector and updates the mean vector; secondly, the similarity between the target commodity and the remaining commodities is calculated in parallel in a multi-thread mode; and finally, dynamic pushing is carried out to generate a pushing list.

The invention relates to a reservoir group scheduling parallel dynamic planning method considering computing resource economy and feasibility. The method comprises the steps of starting; computing resource recognition; problem scale recognition; import of known data into a transit process and trial; analysis of computing resource economy and feasibility; judgment of computing resource and problemscale matching; import of the known data into peer processes; execution of parallel dynamic planning operation; export of a reservoir group scheduling result; and stop. According to the method, the "dimension disaster" problem of reservoir group scheduling is solved according to serial dynamic planning, distributed computing is adopted to cope with a "time disaster", distributed storage is adoptedto cope with a "memory disaster", and computing efficiency and availability are improved. From the perspective of economy, distributed memories, hard disk fragments and a dynamic access technology are utilized, hard disks replace memory space, and economical expenditure is substantially saved. From the perspective of feasibility, computing time and memory and hard disk space demands are given, matching between computing resources and the problem scale is prejudged and adjusted, and the situation that overloaded operation causes ineffective computing is avoided.