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.

Abstract: A system synchronization method includes: connecting synchronization modules of a plurality of devices together through a synchronization bus. The synchronization modules include a signal generation module, a switch control module, a synchronization bus monitoring module, and a switch S1. A signal output terminal of the signal generation module is connected to a first terminal of the switch S1, and a timing overflow terminal of the signal generation module is connected to the switch control module configured to control the switch S1. The switch control module is connected to the synchronization bus monitoring module. A second terminal of the switch S1 is connected to the switch control module and the synchronization bus monitoring module. The system synchronization method has the advantages of simple structure, low cost, high reliability, and good practicability.

Abstract: An SPUF based on combinational logic and scan chain comprises an external stimulus source, a combinational logic circuit module, a scan chain circuit module, a data processing module and n switch circuits SW0, SW1, . . . , SWn-1, n=2m, and m is an integer greater than or equal to 1; combinational logic circuit module comprises n switch circuits S0, S1, . . . , Sn-1 and a combinational logic circuit; the scan chain circuit module comprises n scan flip-flops (SFFs) SFF0, SFF1, . . . , SFFn-1; each of the n switch circuits SW0, SW1, . . . , SWn-1 and the n switch circuits S0, S1, . . . , Sn-1 is implemented by a 2-to-1 multiplexer. The SPUF based on combinational logic and scan chain has high uniqueness and randomness, requires a few clock frequency changes, and has high reliability, more bits of responses and high security.

Abstract: A matching control method for mechanical impedance of a magnetostrictive precision transducer includes developing a three-layer neural network model corresponding to a Young's modulus of a Terfenol-D material; acquiring sample data to form a training sample set and a testing sample set; training the model using a Bayesian regularization training algorithm, and optimizing connection weights and thresholds among layers of the tested model, so as to obtain a final three-layer neural network model; based on the final model, building an inverse model of mechanical impedance of the magnetostrictive precision transducer; using a current level of impedance of a load as an input of the inverse model to obtain a bias magnetic field, and changing a level of the bias magnetic field by changing a bias current in an excitation coil of the transducer, thereby achieving adaptive matching between the mechanical impedance of the transducer and the impedance of the load.

Abstract: The present invention discloses a bidirectional collapse-proof damper with a macroscopic NPR structure and a bridge structure having the same, comprising a sleeve and a sliding rod; by adding a structure of a reducing part and a limiting body, a sliding gap exists between both ends of the limiting body and both inner ends of the reducing part; the rod body is connected with the inner side wall of the sleeve through an elastic element; the limiting body and the rod body can realize bidirectional slip in the sleeve, which have multi-level seismic performance.

Abstract: The invention relates to a Novosphingobium sp. SJB007 and an application thereof in removal of phosphorus from wastewater, belonging to the technical field of environmental microorganisms. One aspect of the invention provides a Novosphingobium sp. SJB007 with an access number of CGMCC (China General Microbiological Culture Collection Center) No. 21177. Another aspect of the invention provides an application of the Novosphingobium sp. SJB007 in removal of phosphorus from wastewater. The efficient phosphorus-accumulating strain Novosphingobium sp. SJB007 provided by the invention has a high removal rate of more than 97% when the concentration of phosphorus in the wastewater is 10-30 mg/L under an appropriate condition.

Abstract: A method for identifying parameters of single-diode photovoltaic cells comprises: measuring an actual output voltage and an actual output current of a single-diode photovoltaic cell under a given temperature and a given light intensity; constructing an ideal model of the single-diode photovoltaic cell, determining to-be-identified parameters, and establishing an objective function; and identifying the to-be-identified parameters through a backtracking search algorithm based on a sine-cosine mechanism to obtain to-be-identified parameter data of the single-diode photovoltaic cell, so that parameters identification of the single-diode photovoltaic cell is completed.

Abstract: An adaptive anti-aging sensor based on a cuckoo algorithm, comprising a control module, a reference voltage-controlled oscillator, two shaping circuits, a frequency difference circuit, a resolution adjustment circuit, a 16-bit counter, a parallel-to-serial circuit, an adaptive module, and a digital-to-analog converter. A lookup table is prestored in the adaptive module; when aging monitoring is performed on a voltage-controlled oscillator in an integrated circuit, the adaptive module uses the cuckoo algorithm to determines the optimal working voltage of the currently monitored voltage-controlled oscillator, and the control module accordingly changes the input voltage of the voltage-controlled oscillator of the integrated circuit.

Abstract: A digital-twin modeling method for an automated testing pipeline for circuit breakers involves acquiring a three-dimensional digitalized model of each mechanical installation in the testing pipeline; modeling hierarchy according to an actual production process and motion states; performing mesh optimization on the resulting model; designing movements of each said mechanical installation, so as to obtain mechanical movement tracks of the models; combining actual movement logic and cooperative relationship among the movements to edit the mechanical movement tracks of the models; and introducing motion control, so as to conduct motion simulation in a digital-twin scene, thereby implementing virtual movements synchronous with movements of the actual testing pipeline.

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 strong and weak hybrid PUF circuit comprises N switch units and an arbiter. Each switch unit consists of two delay modules and two 2:1 multiplexers. The N switch units constitute two completely symmetrical delay paths. Each delay module consists of six stages of delay cells. During the operating process, a transmission signal selects a turn-on path of the corresponding 2:1 multiplexers according to activation signals; the switch units in the PUF circuit are in a valid state (if the delay modules are turned on) or in an invalid state (if the delay modules are not turned on) according to whether the delay modules are turned during the operating process; and the strong and weak hybrid PUF circuit can be flexibly configured to be of two different types (a strong PUF circuit and a weak PUF circuit) according to changes of the Hamming weight of input activation signals.