Abstract: A multi-degree-of-freedom spherical motor includes a primary frame, a secondary frame, a tertiary frame, a terminal rotor, a first rotating shaft, a second rotating shaft, a third rotating shaft, permanent magnets and electromagnetic coils. The electromagnetic coils are arranged on an inner surface of the primary frame. Two sides at a top portion of the primary frame are symmetrically connected to the secondary frame through the first rotating shaft. The tertiary frame is arranged inside the secondary frame in a non-mechanical contact manner. The terminal rotor and the tertiary frame are connected through the third rotating shaft. The permanent magnets are arranged on one side of the terminal rotor close to the primary frame. The secondary frame and the tertiary frame are connected through the second rotating shaft. The first rotating shaft, the second rotating shaft and the third rotating shaft are perpendicular to each other.

Abstract: The present invention discloses a computing array based on 1T1R device, operation circuits and operating methods thereof. The computing array has 1T1R arrays and a peripheral circuit; the 1T1R array is configured to achieve operation and storage of an operation result, and the peripheral circuit is configured to transmit data and control signals to control operation and storage processes of the 1T1R arrays; the operation circuits are respectively configured to implement a 1-bit full adder, a multi-bit step-by-step carry adder and optimization design thereof, a 2-bit data selector, a multi-bit carry select adder and a multi-bit pre-calculation adder; and in the operating method corresponding to the operation circuit, initialized resistance states of the 1T1R devices, word line input signals, bit line input signals and source line input signals are controlled to complete corresponding operation and storage processes.

Abstract: A stripe merging method and system based on erasure codes are provided. A StripeMerge-P algorithm is used first to determine alignment information of parity chunks of erasure code stripes based on a preprocessed hash table. Through a greedy strategy, erasure code stripe pairs to be merged are selected for merging. Through the hash table, location information of the parity chunks is directly looked up, so that no additional computing overhead is required, and the overhead of selecting and merging the erasure code stripe pairs is further reduced through the combination with the greedy strategy.

Abstract: The disclosure uses the Carter's coefficient to correct the equivalent electromagnetic air gap length. And the specific permeance on both sides of the primary core is obtained. Then, the permeance on both sides based on the structure of the primary core is calculated. An equation is established by using the continuity principle of flux, thereby obtaining the air gap magnetomotive force model of current-carrying conductor. The slot vector diagram of magnetomotive force in short primary linear machine is illustrated according to that in the rotating machine. Then, based on the winding arrangement and vector combination, the amplitude and phase of various spatial harmonic wave of the three-phase winding are obtained. Finally, the characteristics of average component distribution of the current-carrying conductor are adopted to obtain the pulsating magnetomotive force generated by the three-phase winding of the linear machine.

Abstract: A method and apparatus for caching a data block are provided. The method includes: obtaining, from a terminal, an access request for requesting access to a first data block; determining that the first data block is missed in a cache space of a storage system; detect whether a second data block satisfies a lazy condition, the second data block being a candidate elimination block in the cache space and the lazy condition being a condition for determining whether to delay replacing the second data block from the cache space according to a re-access probability; determining that the second data block satisfies the lazy condition; and accessing the first data block from a storage space of the storage system and skipping replacing the second data block from the cache space.

Abstract: The present invention relates to a method and a system for robust, searchable, symmetrical encryption, the method comprising: during initialization, having a retrieval server perform retrieval on stored ciphertext information according to a searchable ciphertext and retrieval trapdoor information (Cntupd, K, Locgrp) sent by a client, wherein, the retrieval server acquires a last received first ciphertext set Cnew from a ciphertext database CDB just before the present retrieval according to a retrieval key K and an encryption counter Cntupd sent by the client, acquiring a second ciphertext set Ccache in a retrieval request history from a cache ciphertext database GRP according to a cache ciphertext index Locgrp, and merging the first ciphertext set Cnew and the second ciphertext set Ccache to form a retrieval set , and sending it to the client for decryption.

Abstract: A topological rotary engine includes a first transmission mechanism, a second transmission mechanism, a valve mechanism, a rotor, and a cylinder. The rotor is arranged in an inner chamber of the cylinder. A cross section of the rotor is a curved-side topological polygon having n sides. A cross section of the inner chamber of cylinder is a curved-side topological polygon having n+1 sides, and n is an even number greater than or equal to 4. An outer topological curved surface of the rotor is meshed with an inner topological curved surface of the cylinder. The rotor reversely revolves around an axis of the cylinder with an eccentricity as a radius while rotating, and divides the cylinder into n+1 independent chambers. The cylinder is provided with n+1 fuel injection nozzles and n+1 spark plugs, which cooperate with the rotor and the valve mechanism.

Abstract: The invention discloses a superconducting gravity gradiometer and a sensitivity improvement method thereof including a pair of superconducting test masses, a pair of negative-stiffness superconducting coils, a pair of positive-stiffness superconducting coils, and a superconducting circuit coupling the test masses into two-degree-of-freedom superconducting magnetic spring oscillators. Superconducting wires are used to connect the negative-stiffness superconducting coils in series to form a superconducting loop, the differential mode stiffness of the two-degree-of-freedom superconducting magnetic spring oscillators is reduced, and the ratio of the common mode stiffness to the differential mode stiffness is increased.

Abstract: The present disclosure discloses a NVM-based method for performance acceleration of containers. The method comprises classifying each image layer of mirror images as either an LAL (Layer above LDL) or an LBL (Layer below LDL) during deployment of containers; storing the LALs into a non-volatile memory and selectively storing each said LBL into one of the non-volatile memory and a hard drive; acquiring hot image files required by the containers during startup and/or operation of the containers and storing the hot image files required by the containers into the non-volatile memory; and sorting the mirror images in terms of access frequency according to at least numbers of times of access to the hot image files so as to release the non-volatile memory currently occupied by the mirror image having the lowest access frequency when the non-volatile memory is short of storage space.

Abstract: An under-driven prosthetic hand with a self-adaptive grasping function is provided, which belongs to the field of medical equipment. The prosthetic hand simultaneously controls four fingers to implement bending and stretching movements by a first motor through structural designs of a prosthetic hand body, a finger transmission module, an inter-finger transmission module, and a thumb driving module, and limits the transmission torque between the motor and screws using a damping shaft and in cooperation with the telescopic characteristic of a telescopic component. On the one hand, mechanical damage to the prosthetic hand structure due to excessive torque outputted by the motor can be prevented. On the other hand, the self-adaptive grasping function of the prosthetic hand can be implemented. The disclosure can also effectively solve issues such as excessive volume or mass of the prosthetic hand, complicated control system, and low operation precision.

Abstract: A three-dimensional ultrasound tomography method and system based on spiral scanning are provided. The method includes the following. (1) Collecting raw data: an emission array element is switched while a probe maintains a uniform linear motion, so that changes in trajectory with time of a position of an equivalent emission array element in a three-dimensional space show a spiral or a partial spiral, and echo data is received. (2) Pre-processing data. (3) Calculating coordinates of each equivalent emission array element. (4) Calculating coordinates of an imaging focus point. (5) Performing synthetic aperture focusing on each imaging focus point. (6) Post-processing data. The disclosure improves the principle of the imaging method, the design of the overall process, etc. Volume data containing information of continuous tissue layers is obtained through spiral scanning.

Abstract: An operating method for improving the performance of a selector device is provided, including: determining and applying a direct current (DC) or alternating current (AC) operating voltage and a limit current of the selector device, so that the selector device circulates until a off-state resistance is reduced; continuously applying the operating voltage and the limit current to the selector device, so that the selector device circulates until the off-state resistance is reduced to a minimum value; continuously applying the operating voltage and the limit current to the selector device, so that the selector device circulates until the off-state resistance is increased; continuously applying the operating voltage and the limit current to the selector device, so that the selector device circulates until the off-state resistance is increased to a maximum value; and adjusting the operating voltage and the limit current, and performing DC or AC operation pulsed operation on a selector.

Abstract: The present invention relates to an optimization method for graph processing based on heterogeneous FPGA data streams. The method can balance processing loads between the CPU processing module and the FPGA processing module during acceleration of graph data processing.

Abstract: The disclosure belongs to the technical field of microelectronic devices and memories, and discloses a three-dimensional stacked phase change memory and a preparation method thereof. The preparation method includes: preparing a multilayer structure in which horizontal electrode layers and insulating layers are alternately stacked, then performing etching to form trenches and separated three-dimensional strip electrodes, next filling the trenches with an insulating medium, and then forming small holes at the boundary region between the three-dimensional strip electrodes and the insulating medium, thereafter sequentially depositing a phase change material on the walls of the small holes, and filling the small holes with an electrode material to prepare vertical electrodes, so as to obtain a three-dimensional stacked phase change memory stacked in multiple layers.

Abstract: A miniature imaging lens for close-range imaging includes: a first lens group, an aperture, and a second lens group sequentially arranged in a direction from the object side to the image side of an optical axis; the first lens group and the second lens group have positive focal power, an object-side clear aperture of the first lens group is larger than an image-side clear aperture of the first lens group, and an object-side clear aperture of the second lens group is less than an image-side clear aperture of the second lens group, and specific process parameters are provided. A sandwich structure lens configuration composed of a first lens group, an aperture and a second lens group can obtain a high close-range imaging effect under the condition of miniaturization, and can effectively reduce aberrations of close-range imaging, especially distortion and chromatic aberration.

Abstract: The invention belongs to a related field of electronic manufacturing technology, and particularly relates to a conformal manufacturing device and a method for a complex curved-surface electronic system, the system includes a support platform and a six-degree-of-freedom spherical motor linkage platform, a 3D measurement module, a laser lift-off module, a curved-surface transfer printing module and a conformal jet printing module respectively mounted on the support platform and independently controllable, and specific structures and work modes of these key components are improved. The invention further discloses a corresponding manufacturing method.

Abstract: The present disclosure belongs to the technical field of artificial neural networks, and provides to a max pooling processor based on 1T1R memory, comprising an input module, a max pooling operation module, and an output module; the input module is configured to transmit an operating voltage according to the convolution result in the convolutional neural network; the 1T1R memory in the max pooling operation module is configured to adjust a conductance value of the RRAM according to the gate voltage of the transistor therein to achieve the max pooling operation by using the non-volatile multi-value conductance regulation characteristic of the RRAM, and store a max pooling result; and the output module is configured to read the max pooling result and output it.

Abstract: The parallel multi-region imaging device includes a multi-focus generation module, a spatial demodulation module, and a detection module. The multi-focus generation module is configured to modulate illumination light to generate a plurality of focuses in an object-side, and to form a plurality of different illumination regions, thereby generating multiple paths of signal light through a sample to be imaged. The spatial demodulation module is configured to make spatial energy distribution of each path of signal light no longer overlap or make an overlapping region smaller than a target requirement. The detection module is configured to independently detect each path of signal light passing through the spatial demodulation module, so as to implement parallel multi-region imaging.

Abstract: A master control system for a remote-sensing satellite image processing device, the system including: a master control management module, a first FPGA module, and a second FPGA module. The master control management module is in connection and communication with the first FPGA module, the second FPGA module, and a housekeeping computer. The first FPGA module is in connection and communication with the second FPGA module and a remote-sensing satellite image processing device. The master control management module is adapted to perform assignment of tasks. The first FPGA module is adapted to communicate with a processor in the satellite image processing device, monitor an operation state of the satellite image processing device, send the operation state information to the master control management module, receive a task assignment command issued by the master control management module, and transmit the task assignment command to the satellite image processing device.

Abstract: The disclosure discloses a trajectory optimization method and device for accurately deploying marine sensors under water. The method includes the following steps. 1. Randomly select N sets of initial control variables within a range. 2. Input all of N sets of xi to the sensor's underwater glide kinematics and dynamics models, and calculate the smallest distance between N actual deployment positions and target deployment positions. 3. Determine whether the number of iterative operations is less than the preset value, if yes, perform global random walk and local random walk on N sets of xi, obtain N sets of xi again, and return to step 2; otherwise, go to step 4. 4. Output the control variable xi corresponding to ?s(x)nminmin and the corresponding trajectory as the optimal control variable and optimal trajectory. The disclosure can improve the accuracy of prediction on the underwater three-dimensional trajectory of the marine sensor.