Abstract: The present invention relates to a trusted measurement and control network authentication method based on double cryptographic values and chaotic encryption. The specific method comprises realizing identity authentication and key negotiation processes through double cryptographic values and chaotic public key ciphers and realizing secure transmission and verification of user identity credentials on the basis of building a trust chain through trusted computation for realizing a secure and trusted operating environment, thereby building a secure and trusted data transmission channel. The identity authentication method in the present invention comprises multiple links such as secure generation of user identity identifiers, read protection encapsulation, secure transmission and key negotiation. Each link adopts a unique and confidential cryptographic function for secure data generation, thereby ensuring the security of the authentication device access in an industrial measurement and control network.

Abstract: A water-air amphibious cross-medium bio-robotic flying fish includes a body, pitching pectoral fins, variable-structure pectoral fins, a caudal propulsion module, a sensor module and a controller. The caudal propulsion module is controlled to achieve underwater fish-like body-caudal fin (BCF) propulsion, and the variable-structure pectoral fins is adjusted to achieve air gliding and fast splash-down diving motions of the bio-robotic flying fish. The coordination between the caudal propulsion module and the pitching pectoral fins is controlled to achieve the motion of leaping out of water during water-air cross-medium transition. The ambient environment is detected by the sensor module, and the motion mode of the bio-robotic flying fish is controlled by the controller.

Abstract: A shutter-type adaptive three-dimensional (3D) display system based on medical microscopic imaging is provided. In the system, a binocular camera is connected to an operating microscope optical system through a beam splitter, and is configured to acquire binocular image data. A control module is configured to input control instructions, where the control instructions include a first type of control instructions and a second type of control instructions. An image processing module calculates image parallaxes based on the binocular image data under the first type of control instructions, and transmits the image parallaxes to the binocular camera to adjust offsets. A display module is configured to generate display data based on the binocular image data and display the display data through a display device for viewing with 3D glasses. The operating microscope optical system is configured to perform an adjustment based on the control instructions.

Abstract: A biomimetic robotic manta ray includes a head cabin, a central cabin, a pair of pectoral fins and a caudal fin cabin. The pectoral fin includes a crank-rocker mechanism and a bevel gear mechanism. The biomimetic robotic manta ray achieves undulatory propulsion through a coordinated periodic motion of the crank-rocker mechanism. A complex closed motion trail of the tail end of the pectoral fin of the manta ray is traced through the coordination of the bevel gear mechanism and the crank-rocker mechanism. The biomimetic robotic manta ray achieves a combined motion of two vertical undulations superimposed on the pectoral fin of a natural manta ray. The motion trail, which has an important effect on the efficient motion of the manta ray, of the tail end of the pectoral fin is approximately simulated.

Abstract: A vascular interventional instrument control device capable of operating double guide wires or balloons, includes a main finger assembly, a first sub-finger assembly, a second sub-finger assembly, a driving assembly and a clamping assembly, wherein the main finger assembly, the sub-finger assembly, the driving assembly and the clamping assembly are separately installed to the body structural member and separately connected to the controller through a communication link, one of the operated double guide wires or balloons is clamped by the main finger assembly and the first sub-finger assembly, and the other is clamped by the main finger assembly and the second sub-finger assembly; and the operated double guide wires or double balloons can be separately moved axially or rotated about its own axial direction.

Abstract: A method, a system and a device for difference automatic calibration in cross modal target detection are provided. The method includes: obtaining a plurality of modals of color-thermal images to be detected, and constructing an input image set; acquiring a feature map of each modal image in the input image set, and extracting a shared candidate region; aligning the shared candidate region, and obtaining a feature representation of the each shared candidate region through pooling; obtaining a category of the feature representation of the shared candidate region based on a preset classifier, and obtaining a position of the shared candidate region through deviation regression; adopting non-maximum value suppression to obtain a shared candidate region with the highest probability according to the category of the feature representation of the shared candidate region, and returning to the image to be detected for marking according to the position of the shared candidate region.

Abstract: A digital receiving apparatus includes an analog-to-digital conversion module, a polyphase filter module, a fast Fourier transform module and a phase compensation module, which transforms signals of a target radio source from time domain to frequency domain. It further includes a standard time acquisition module configured to acquire a standard timestamp, a communication module configured to communicate with a host computer, a delay parameter temporary storage module configured to store a to-be-compensated delay parameter, a control enable module configured to generate an enable signal, a delay module configured to perform delay, and a phase parameter generation module configured to temporarily store the to-be-compensated delay parameter and convert it into a phase compensation parameter.

Abstract: A biomimetic robotic manta ray includes a head cabin, a central cabin, a pair of pectoral fins and a caudal fin cabin. The pectoral fin includes a crank-rocker mechanism and a bevel gear mechanism. The biomimetic robotic manta ray achieves undulatory propulsion through a coordinated periodic motion of the crank-rocker mechanism. A complex closed motion trail of the tail end of the pectoral fin of the manta ray is traced through the coordination of the bevel gear mechanism and the crank-rocker mechanism. The biomimetic robotic manta ray achieves a combined motion of two vertical undulations superimposed on the pectoral fin of a natural manta ray. The motion trail, which has an important effect on the efficient motion of the manta ray, of the tail end of the pectoral fin is approximately simulated.

Abstract: The present invention relates to a security processing unit of PLC and a bus arbitration method thereof, to provide PLC with an active defense means to build a PLC hardware and software security layer. On a hardware security layer, a part of hardware processing mechanism is added to support trusted measurement, encryption algorithms and signature algorithms, and a virtual isolation technology is used; and on a software security layer, transparent encryption and decryption, integrity verification, backup recovery and virtual isolation security mechanism are provided. The security processing aspect is improved to achieve the purpose of security and reliability. The present invention can correctly establish a trusted environment of PLC to ensure that PLC is guided by a strictly verified path. A new star type trusted structure is designed to reduce loss during information transmission and increase information transmission efficiency.

Abstract: The present invention relates to a network guard unit for an industrial embedded system and a guard method. The specific method is to form the network guard unit (NGU) through security technologies, such as integrated access control, identity authentication and communication data encryption, to provide active guard for a site control device. The NGU comprises an access control module, an identity authentication module, a data encryption module, a key negotiation module and a PCIE communication module, and supports the communication modes of dual network cards and PCIE bus. The present invention builds a secure and trusted operating environment for industrial control systems in combination with an active guard technical means in the field of information security on the basis of ensuring the correctness and the feasibility of security of various terminal devices in the industrial control systems.

Abstract: A neurovascular coupling analytical method based on an electroencephalogram and functional near-infrared spectroscopy includes: S100: acquiring an electroencephalogram signal and a brain hemodynamic signal; S110: extracting an event-related potential signal from the electroencephalogram signal; S120: extracting a time characteristic from the event-related potential signal; S130: extracting a hemodynamic response function from the brain hemodynamic signal; S140: extracting an amplitude characteristic and time characteristics from the hemodynamic response function; and S150: analyzing influence of the time characteristic of the event-related potential signal on the amplitude characteristic and the time characteristics of the hemodynamic response function to obtain a coupling result. The time characteristic of the event-related potential signal is a delay.

Abstract: A vascular interventional instrument control device capable of operating double guide wires or balloons, includes a main finger assembly, a first sub-finger assembly, a second sub-finger assembly, a driving assembly and a clamping assembly, wherein the main finger assembly, the sub-finger assembly, the driving assembly and the clamping assembly are separately installed to the body structural member and separately connected to the controller through a communication link, one of the operated double guide wires or balloons is clamped by the main finger assembly and the first sub-finger assembly, and the other is clamped by the main finger assembly and the second sub-finger assembly; and the operated double guide wires or double balloons can be separately moved axially or rotated about its own axial direction.

Abstract: A neural network-based error compensation method for 3D printing includes: compensating an input model by a deformation network/inverse deformation network constructed and trained according to a 3D printing deformation function/inverse deformation function, and performing the 3D printing based on the compensated model. Training samples of the deformation network/inverse deformation network include to-be-printed model samples and printed model samples. The deformation network constructed according to the 3D printing deformation function is marked as a first network. During training of the first network, the to-be-printed model samples are used as real input models, and the printed model samples are used as real output models. The inverse deformation network constructed according to the 3D printing inverse deformation function is marked as a second network.

Abstract: The present invention relates to a dynamic security method and system based on multi-fusion linkage response. In the method, a site control device conducts active response and passive response through identity authentication and key management to give an alarm for abnormal behaviors. The system comprises an access authentication active response module, an access control active response module, an access control passive response module, an abnormal pretending passive response module, a key vulnerability passive response module and an abnormal state passive response mechanism module. On the basis of ensuring validity and feasibility for the security of a terminal device, the present invention can build a secure and trusted industrial control system operating environment.

Abstract: A digital receiving apparatus includes an analog-to-digital conversion module, a polyphase filter module, a fast Fourier transform module and a phase compensation module, which transforms signals of a target radio source from time domain to frequency domain. It further includes a standard time acquisition module configured to acquire a standard timestamp, a communication module configured to communicate with a host computer, a delay parameter temporary storage module configured to store a to-be-compensated delay parameter, a control enable module configured to generate an enable signal, a delay module configured to perform delay, and a phase parameter generation module configured to temporarily store the to-be-compensated delay parameter and convert it into a phase compensation parameter.

Abstract: The present invention discloses a method for trusted booting of PLC based on a measurement mechanism, comprising the following steps: a step of initializing self firmware verification; a step of reading and computing firmware information about a PLC; a step of checking and storing one by one; and a step of verifying at the operation start stage. In the method of the present invention, a chip with a trusted function is used as a core of hardware computation. The PLC extends a Flash bus for loading by hardware of the method of the present invention. The hardware of the method of the present invention recognizes necessary boot information, verifies the integrity of the boot loader necessary for the PLC system through the integrity check method and ensures that the booted PLC system is in a trusted state. On the basis of ensuring validity and feasibility for the safety of a terminal device, the present invention can build a safe and trusted industrial control system operating environment.

Abstract: A neural network-based error compensation method for 3D printing includes: compensating an input model by a deformation network/inverse deformation network constructed and trained according to a 3D printing deformation function/inverse deformation function, and performing the 3D printing based on the compensated model. Training samples of the deformation network/inverse deformation network include to-be-printed model samples and printed model samples. The deformation network constructed according to the 3D printing deformation function is marked as a first network. During training of the first network, the to-be-printed model samples are used as real input models, and the printed model samples are used as real output models. The inverse deformation network constructed according to the 3D printing inverse deformation function is marked as a second network.

Abstract: A multi-label object detection method based on an object detection network includes: selecting an image of an object to be detected as an input image; based on a trained object detection network, obtaining a class of the object to be detected, coordinates of a center of the object to be detected, and a length and a width of a detection rectangular box according to the input image; and outputting the class of the object to be detected, the coordinates of the center of the object to be detected, and the length and the width of the detection rectangular box. The method of the present invention can perform real-time and accurate object detection on different classes of objects with improved detection speed and accuracy, and can solve the problem of object overlapping and occlusion during the object detection.

Abstract: The method of the present disclosure includes: obtaining an image to be processed and a question text corresponding to the image; using an optimized dialogue model to encode the image into an image vector and encode the question text into a question vector; generating a state vector based on the image vector and the question vector; decoding the state vector to obtain and output an answer text. A discriminator needs to be introduced in an optimization process of the optimized dialogue model. The dialogue model and the discriminator are alternately optimized until a value of a hybrid loss function of the dialogue model and a value of a loss function of the discriminator do not decrease or fall below a preset value, thereby accomplishing the optimization process.

Abstract: A folding space shelf has a lower backplane and an upper backplane that are connected by one or more hinges, and a pair of top crossbeams and a pair of upper stringers. Each top crossbeam has a first end hinged to an upper portion of the upper backplane and a second end rotatably connected to one of the pair of upper stringers. It further contains a pair of bottom crossbeams and a pair of bottom stringers. Each bottom crossbeam has a first end hinged to a lower portion of the lower backplane and a second end rotatably connected to one of the pair of bottom stringers. The folding space shelf also contains a pair of middle stringers, each having a first end connected to one of the pair of upper stringers and a second end hinged to one of the pair of the bottom stringers.