Abstract: A signal processing circuit for a tunneling magnetoresistance sensor comprises thirty-eight MOS transistors, two capacitors and ten switches. A first switch, a second switch, a third switch, a fourth switch, a first MOS transistor, a second MOS transistor, a third MOS transistor and a fourth MOS transistor form a high-frequency modulation circuit. A fifth switch, a sixth switch, a seventh switch, an eighth switch, a seventeenth transistor, a twenty-second MOS transistor and a twenty-third MOS transistor form a high-frequency demodulation circuit. A signal output by a tunneling magnetoresistance sensor is modulated to a chopping frequency by the high-frequency modulation circuit, and is then demodulated by the high-frequency demodulation circuit.

Abstract: A bistable physical unclonable function circuit based on subthreshold leakage current deviation comprises a time sequence control circuit, a decoder, 16 bias voltage converters and a PUF array, wherein the time sequence control circuit is used for generating a precharge signal and an enable signal, the decoder is used for converting an external stimulus signal into 16 decoded signals under the control of the precharge signal and the enable signal, the kth bias voltage converter is used for converting the kth decoded signal into a kth word line signal which is input to the PUF array, the PUF array is used for generating 16 response signals under the control of the precharge signal and the 16 word line signals, and comprises four PMOS transistors, four NMOS transistors, two two-input NAND gates and sixteen PUF units, and each PUF unit comprises two NMOS transistors.

Abstract: A FET with a multi-value switching function comprises a source region, a channel region, a drain region, a gate dielectric layer, a substrate layer, a gate-oxide inducer layer, a metal layer and a spacer layer. The channel region is an undoped channel region, the drain region is an undoped drain region. The metal layer comprises first to third metal blocks which are arranged at intervals from left to right, the distance between the first metal block and the second metal block is 12 nm, the distance between the second metal block and the third metal block is 10 nm, the first metal block is a main control gate of the FET, the second metal block and the third metal block are two inducer gates of the FET, and the spacer layer is used for isolating the first metal block from the second metal block and the third metal block.

Abstract: An Aspergillus oryzae and its application belong to the field of microbiology and food processing technology. The present application, on the one hand, provides an Aspergillus oryzae (WZ-212), on the other hand, provides this Aspergillus oryzae in application of enhancing the inhibitory activity of ?-glucosidase by grapefruit peel and the method of application. Using the Aspergillus oryzae of this application to treat grapefruit peel, the inhibition of ?-glucosidase activity by grapefruit peel extract was significantly enhanced, and the process is simple, low cost, which is easy to achieve industrial production.

Abstract: A reliable multi-information entropy PUF for Internet of Things security includes a control circuit, a data register, 128 glitch generation circuits, a 128-to-1 multiplexer, and a Schmidt glitch sampling module. The control circuit controls the data register to generate a square signal, the 128 glitch generation circuits to generate glitch signals to be output and the 128-to-1 multiplexer to select the glitch signals to be output. The Schmidt glitch sampling module samples the glitch signals to obtain PUF response outputs. Each glitch generation circuit generates a glitch signal by means of a fully symmetrical structure. The Schmidt glitch sampling module comprises a first PMOS transistor, a second PMOS transistor, a third PMOS transistor, a fourth PMOS transistor, a first NMOS transistor, a second NMOS transistor, a third NMOS transistor, a fourth NMOS transistor, a buffer module and a D flip-flop.

Abstract: A readout circuit for a high-precision vibration sensor comprises an on-chip self-test circuit, a low-noise charge amplifier, a correlated double sampling circuit, a PID feedback control circuit, a phase compensation circuit and Sigma-Delta. A self-test signal is amplified by the low-noise charge amplifier, low-frequency noise and offsets are filtered out by the correlated double sampling circuit, then a self-test path and a working path of a vibration sensor are separated in the time domain by the PID feedback control circuit, the phase compensation circuit performs zero compensation and pole compensation on the signal, and Sigma-Delta converts an analog signal into a high-precision digital signal.

Abstract: The invention discloses a challenge screening method for improving the stability of a strong Physical Unclonable Function (PUF). If the stability of the group of challenges (GOCs) is quantized by 1 or 0, the GOCs are defined as stable challenges or unstable challenges respectively; the GOCs and the stability of corresponding responses are defined as a challenge-stability pair (CSP); a machining learning training dataset is constructed through CSPs for obtaining a screening model, to associate the challenge stability with the screening model; during actual application of the strong PUF, the challenge stability of a strong PUF is determined through the screening model, and stable challenges of the strong PUF are screened out to form a stable challenge set, which is input into the strong PUF to extract identity information. The challenge screening method can effectively improve the stability of various strong PUFs and has better effect with external disturbance increasing.

Abstract: A machine learning attack resistant strong PUF with a dual-edge sampling function comprises switch units, a first arbiter and a second arbiter. The first arbiter is for determining a sequential order of delays at a rising edge of signals input to a first input terminal and a second input terminal of the first arbiter. The second arbiter is for determining a sequential order of delays at a falling edge of signals input to a first input terminal and a second input terminal of the second arbiter. Each switch unit is composed of eight MOS transistors. The strong PUF has a high capacity to resist machine learning attacks and small hardware expenditure through simple structural design of the switch units, realizing machine learning attack resistance and small hardware expenditure at the same time, and generating a large number of challenge response pairs through dual-edge sampling realized by the two arbiters.

Abstract: The invention discloses a multi-threshold segmentation method for medical images based on an improved salp swarm algorithm. A two-dimensional histogram is established by means of a grayscale image of a medical image and a non-local mean image, then a salp swarm algorithm is used to determine thresholds selected by a Kapur entropy-based threshold method, and the salp swarm algorithm is improved and mutated by an individual-linked mutation strategy during the threshold selection process to avoid local optimization, so that the segmentation effect on the medical image is optimized; and the method has the advantages of good robustness and high accuracy.

Abstract: Disclosed is a software PUF based on an RISC-V processor for IoT security. A 32-bit RISC-V processor is used to generate abnormal information results in an abnormal operating state under a low voltage, and the abnormal information results are used to represent the features of the 32-bit RISC-V processor; 5-bit binary data obtained by comparing the abnormal information results with normal information results has high randomness and uniqueness and it is extremely difficult to directly extract internal abnormal information result from a hardware circuit of the 32-bit RISC-V processor, so modeling attacks based on the 5-bit binary data calculated according to the abnormal information results of the 32-bit RISC-V processor are almost impossible; in addition, when the 32-bit RISC-V processor is in an abnormal operating state, the operating frequency of the 32-bit RISC-V processor is dynamically adjusted through a frequency compensation method.

Abstract: A bistable physical unclonable function circuit based on subthreshold leakage current deviation comprises a time sequence control circuit, a decoder, 16 bias voltage converters and a PUF array, wherein the time sequence control circuit is used for generating a precharge signal and an enable signal, the decoder is used for converting an external stimulus signal into 16 decoded signals under the control of the precharge signal and the enable signal, the kth bias voltage converter is used for converting the kth decoded signal into a kth word line signal which is input to the PUF array, the PUF array is used for generating 16 response signals under the control of the precharge signal and the 16 word line signals, and comprises four PMOS transistors, four NMOS transistors, two two-input NAND gates and sixteen PUF units, and each PUF unit comprises two NMOS transistors.

Abstract: A low-power pulse output circuit comprises first to third PMOS transistors, first NMOS to third NMOS transistors, a resistor regulation module, a capacitor regulation module, an inverter and a buffer. Drains of the first PMOS and first NMOS transistors, gates of the first NMOS, second PMOS, second NMOS, and third NMOS transistors are connected. Drain of the second PMOS transistor, gate of the third PMOS transistor and one terminal of the resistor regulation module are connected. The other terminal of the resistor regulation module and drain of the second NMOS transistor are connected. Drain of the third PMOS transistor, drain of the third NMOS transistor and an input terminal of the inverter are connected. An output terminal of the inverter, the other terminal of the capacitor regulation module and an input terminal of the buffer are connected.

Abstract: Disclosed is a wireless detection device for quickly positioning a throw-fill stone falling depth and long-term settlement in blasting silt-squeezing construction, including a gravity ball and a signal receiving, processing and controlling system. The gravity ball is internally provided with test mechanisms, signal collecting and transmitting apparatuses and batteries. Also disclosed is a wireless detection method implemented using the above wireless detection device. The device and the method can detect the throw-fill stone falling depth and distribution situation in a blasting silt-squeezing construction process in real time, so that the effect evaluation and quality control of blasting silt-squeezing can be monitored in real time, the situation that the falling of throw-fill stones is incomplete can be acquired in time, monitoring data support can be provided for corresponding processing measures, and long-term settlement and other monitoring can be carried out.

Abstract: A low-power pulse output circuit comprises first to third PMOS transistors, first NMOS to third NMOS transistors, a resistor regulation module, a capacitor regulation module, an inverter and a buffer. Drains of the first PMOS and first NMOS transistors, gates of the first NMOS, second PMOS, second NMOS, and third NMOS transistors are connected. Drain of the second PMOS transistor, gate of the third PMOS transistor and one terminal of the resistor regulation module are connected. The other terminal of the resistor regulation module and drain of the second NMOS transistor are connected. Drain of the third PMOS transistor, drain of the third NMOS transistor and an input terminal of the inverter are connected. An output terminal of the inverter, the other terminal of the capacitor regulation module and an input terminal of the buffer are connected.

Abstract: The present disclosure provides a two-dimensional motor piston pump, including a two-dimensional motor and a two-dimensional piston pump. The two-dimensional motor and the two-dimensional piston pump are nested with each other and arranged coaxially. The two-dimensional motor includes a stator and an outer rotor, and the outer rotor is coaxial with the stator and is sleeved outside the stator. The two-dimensional piston pump includes: a flow distribution mechanism including a flow distribution rotor and a pump body, a piston mechanism including a left cam and a right cam; a roller assembly including a roller and a roller shaft, and a pump housing, a left end cover, and a right end cover.

Abstract: A two-dimensional motor combination piston pump by combining two independent two-dimensional piston pumps into one structure is provided. The combination piston pump includes a two-dimensional motor and a two-dimensional piston pump. The outer rotator serves as the piston and the flow distribution mechanism of the two-dimensional piston pump. While operating, outer rotator rotates and moves axially.

Abstract: A high-speed machining tool made of a steel-bonded carbide and a method for preparing the same relate to the technical field of lathe tools made of steel-bonded carbides, and overcome the problems of traditional steel-bonded carbide lathe tools about low hardness and low toughness. The high-speed machining tool includes a skeleton, a main body, and a coating. The main body is consolidated by the skeleton from inside. The skeleton and the main body are both ringlike in shape. The main body has its outer surface covered by the coating. The high-speed machining tool is such made that the skeleton is hard and the main body is tough. The blade of the tool is hard and can transfer vibrations to the main body, thereby protecting the tool from brittle fractures and improving the overall performance of the tool.

Abstract: An optical fiber multi-parameter sensing system and method are provided. The optical fiber multi-parameter sensing system comprises a light source, an optical circulator, a fiber-tip probe sensor and an optical spectrum analyzer, wherein the fiber-tip probe sensor can be placed into an analyte without changing the characteristics of the analyte. The variation of a bulk parameter that is a bulk refractive index of bulk environment around the fiber-tip probe sensor and a surface parameter which is a thickness of surface dielectric layer of the fiber-tip probe sensor can be determined simultaneously by monitoring the changing of resonance intensity and resonance wavelength of a single fiber-tip leaky mode resonance. The sensing system optionally configured such that multiple parameters in the analyte around the fiber-tip probe sensor can be obtained by detecting a single resonance peak.

Abstract: A method for optimizing a weight of a disc spring includes: determining an objective function for weight optimization of the disc spring and key parameters to be solved; optimizing an original Harris Hawks optimization structure, specifically including: first, eliminating steps of centralized calculation of objective function values of the original Harris Hawks optimization except a step of population initialization, and recording a result when a better solution is obtained; second, introducing a random unit permutation mechanism before an end of each iterative optimization of the original Harris Hawks optimization; third, deleting a step of searching for an energy factor E with an absolute value greater than or equal to 1; and solving the key parameters by means of the optimized Harris Hawks optimization referred to as the random unit permutation-based Harris Hawks optimization to obtain the key parameters for weight optimization of the disc spring.

Abstract: An Aspergillus oryzae and its application belong to the field of microbiology and food processing technology. The present application, on the one hand, provides an Aspergillus oryzae (WZ-212), on the other hand, provides this Aspergillus oryzae in application of enhancing the inhibitory activity of ?-glucosidase by grapefruit peel and the method of application. Using the Aspergillus oryzae of this application to treat grapefruit peel, the inhibition of ?-glucosidase activity by grapefruit peel extract was significantly enhanced, and the process is simple, low cost, which is easy to achieve industrial production.