Abstract: Disclosed is a serial test circuit for controllable Chiplets, which belongs to the technical field of test or measurement of semiconductor devices during manufacturing or processing. The test circuit includes a master control test module, a slave control test module, a clock controlling module and an outputting module. The master control test module is composed of a test access port module, a segment insertion bit module and a test data register module. The test controlling signal is generated by the master control test module, and the test inputting signals of the slave Chiplets are respectively controlled by the slave control test module after receiving the test controlling signal. At the same time, the test controlling signal is inputted to the clock controlling module to obtain the clock signals of the slave Chiplets. The output signal of the test outputting module is determined by the test controlling signal.

Abstract: Disclosed is a serial test circuit for controllable Chiplets, which belongs to the technical field of test or measurement of semiconductor devices during manufacturing or processing. The test circuit includes a master control test module, a slave control test module, a clock controlling module and an outputting module. The master control test module is composed of a test access port module, a segment insertion bit module and a test data register module. The test controlling signal is generated by the master control test module, and the test inputting signals of the slave Chiplets are respectively controlled by the slave control test module after receiving the test controlling signal. At the same time, the test controlling signal is inputted to the clock controlling module to obtain the clock signals of the slave Chiplets. The output signal of the test outputting module is determined by the test controlling signal.

Abstract: A downlink channel estimation method based on a co-prime array in asymmetric massive MIMO architecture is provided. First, an uplink and downlink asymmetric receiving and transmitting system model based on a co-prime array is established, and a deviation of the frequency domain direction caused by array broadband signals is observed; then, uplink receiving is performed to estimate an uplink channel, and channel parameters such as the number of paths, the angle of arrival and the path gain are recovered; and finally, a downlink channel is reconstructed based on the channel parameters recovered according to the uplink channel. By means of the high angular resolution of the co-prime array, the problem that a recovered uplink channel cannot be directly used for pre-coding of a downlink channel is solved.

Abstract: A method for manufacturing a vertical blue light emitting diode (LED) includes: bonding a growth substrate to a conductive substrate; peeling off the growth substrate; etching the nitride epitaxial layer to remove the buffer layer and the undoped GaN layer and to thin the N-type GaN layer, such that a thickness of a residual nitride epitaxial layer is less than a wavelength of blue light; and forming an N-type electrode on a surface of a residual N-type GaN layer.

Abstract: The invention provides a blockchain-based supervision method for an electronic immunity passport. A certificate authority generates and correspondingly distributes public-private key pairs. A hospital generates an immunity passport for a vaccine and assigns a passport number; encrypts the immunity passport and the passport number; and generates and uploads a transaction to a national alliance chain node (NACN). The NACN generates and uploads a second transaction to a world alliance chain (WAC). When the vaccine is requested to show the immunity passport, the vaccinee provides the passport number, generates and uploads a trapdoor to the WAC. The vaccine decrypts received ciphertext from the WAC to obtain plaintext data. An alliance chain node performs periodic maintenance by a smart contract.

Abstract: A method for manufacturing a transparent electrode with a low surface roughness, in particular a method for preparing a large-area, low-cost and patterned transparent electrode using the screen-printing technology, which focuses on solving the problem of a high roughness of a screen-printed pattern. First, a substrate is coated with a layer of a smooth conductive material, then screen printing is performed to obtain a conductive pattern, and finally, a layer of a surfactant-modified composite conductive material is applied and film transfer printing is performed to obtain a transparent electrode with a low surface roughness. The transparent electrode prepared by the method retains a smooth surface of the original substrate after peeling, which has a remarkably low surface roughness and a significantly increased success rate of film transfer printing, and can be directly applied to various photoelectric devices, such as solar batteries, LEDs, flat panel displays and electronic sensors.

Abstract: The present disclosure relates to the field of design for testability of super-large-scale integrated circuits, and discloses a flexible configurable module (FCM) based chiplet test circuit. The core structure of the circuit is located at an interposer. The test circuit includes FCMs, a control signal configuration module and a test state control module, where the FCM adopts a two-way skew-symmetric structure to implement data transmission in the horizontal direction and the vertical direction; the control signal configuration module is connected to control signals of all the FCMs, so as to control the data transmission directions as well as switch on and switch off states of all the FCMs; and the test state control module controls the shift and update operations of data inside the FCMs and the control signal configuration module.

Abstract: A vertical blue LED includes: a conductive substrate, the conductive substrate including a first surface and a second surface opposite to the first surface a nitride epitaxial layer; a metal reflective layer, positioned on the first surface; a nitride epitaxial layer, positioned on a surface of the metal reflective layer and including a P-type GaN layer, a quantum well layer, a preparation layer, and an N-type GaN layer that are sequentially stacked along a direction perpendicular to the conductive substrate, wherein a thickness of the nitride epitaxial layer is less than a wavelength of blue light; an N-type electrode, positioned on a surface of the N-type GaN layer; and a P-type electrode, positioned on the second surface.

Abstract: The present disclosure discloses a method for extracting parasitic capacitance of interconnection lines of an integrated circuit based on discontinuous Galerkin finite element method.

Abstract: Disclosed are an ergonomic evaluation method and simulation system based on virtual-real fusion. The system includes a user and device module, a virtual scene building module, and a data processing and analysis module. The method includes: obtaining real-time human joint point position data by means of a human motion capturing device, generating a character model of a current posture, and integrating the character model into a visual device and a personal computer (PC) terminal that are implanted with a virtual scene; obtaining comprehensive human joint point data through computation according to the real-time human joint point position data, and obtaining virtual scene data; and determining a human motion according to the comprehensive human joint point data and the virtual scene data, obtaining human posture data, obtaining human posture evaluation information through computation, and conducting analysis to determine whether an ergonomic evaluation index is rational.

Abstract: The present disclosure discloses a method for extracting parasitic capacitance of interconnection lines of an integrated circuit based on discontinuous Galerkin finite element method.

Abstract: The present disclosure relates to the field of design for testability of super-large-scale integrated circuits, and discloses a flexible configurable module (FCM) based chiplet test circuit. The core structure of the circuit is located at an interposer. The test circuit includes FCMs, a control signal configuration module and a test state control module, where the FCM adopts a two-way skew-symmetric structure to implement data transmission in the horizontal direction and the vertical direction; the control signal configuration module is connected to control signals of all the FCMs, so as to control the data transmission directions as well as switch on and switch off states of all the FCMs; and the test state control module controls the shift and update operations of data inside the FCMs and the control signal configuration module.

Abstract: A source-grid-load-storage networked collaborative frequency control method is disclosed, which comprises acquiring total active power ?P to be regulated during a secondary frequency regulation process of a power grid; performing frequency regulation by source-grid-load-storage of the power distribution system, allocating power regulation capacities, and determining whether the desired total active power is met after the frequency regulation; if the desired total active power is met, determining whether power of power generation units is out of limit; if the power of the power generation units is not out of limit, keeping active power of the power distribution system in balance to complete frequency regulation of the power grid; if the power of the power generation units is out of limit, correcting the power regulation capacities of the power generation units of the source-grid-load-storage and compensating a power difference to keep the active power of the power distribution system in balance.

Abstract: Provided is a pattern division multiple access (PDMA) communication system based on optimal frequency-hopping patterns, which includes a transmitter and a receiver. The transmitter modulates an input baseband signal into a modulated signal, and then converts the modulated signal into a signal that hops in frequency according to the optimal frequency-hopping pattern. The receiver reverts the received frequency-hopping signal to an output modulated signal using an optimal frequency-hopping pattern same as that of the transmitter, and then demodulates the modulated signal into a baseband signal. The optimal frequency-hopping patterns are obtained by applying two-dimensional cyclic shift to a Golomb Costas array constructed based on an extension field, and thus are frequency-hopping patterns with ideal autocorrelation and cross-correlation properties.

Abstract: An optimization method for turbines of a thermal power unit based on sparse big data mining in the technical field of turbine optimization. The optimization method comprises: acquiring historical operating data of a unit; selecting a set of controllable operating parameters highly correlated with the heat rate of turbines as optimized parameters; constructing a new sparse data-oriented pattern-growth association rule mining algorithm based on binary matrixes and the hyperlink technique; proposing a load balancing strategy based on matrix operation on an Apache Spark platform, and parallelly implementing the global calculation-balanced pattern-growth association rule mining algorithm; and discretizing the historical operating data by clustering, parallelly mining the discretized historical operating data to obtain an association rule, and performing de-discretization to obtain target values of the optimized parameters of the turbines under boundary conditions.

Abstract: A group division method based on a social relationship in combination with a selfish preference order is provided, the method includes the following steps: step 1, forming a preliminary group by simulating choices of users to gather into groups for sharing cost based on social values of the users; and step 2, drawing up combining and splitting rules according to a selfish preference order, subjecting the groups obtained in step 1 to combining or splitting on a basis of the combining and splitting rules, and ending the combining or splitting upon reaching a Nash equilibrium point, thereby obtaining stable groups. In the scenario of a static game with complete information, a Nash equilibrium point is found out based on the combination of a social relationship and a selfish preference order, so that the stability of group division is improved, and extreme users are removed.

Abstract: Disclosed is a characterization method based on deep reinforcement learning for discrete manufacturing industry data. The method includes: collecting discrete manufacturing industry data, and creating a spatio-temporal database; dividing the discrete manufacturing industry data into a discrete feature and a continuous feature, creating a data coupling coding network, converting a coding vector in the coding network into a characterization vector, and creating a data characterization model; quantitatively characterizing discrimination of a data category by means of cluster evaluation indexes; and using weights of cluster evaluation indexes of different dimensions as dynamic rewards, creating a deep reinforcement learning model, and updating a neural network parameter of deep reinforcement learning through characterization of an interactive relation between a model and a discrete manufacturing decision-making analysis system.

Abstract: The invention discloses a block copolymer intrinsic stretchable electroluminescent elastomer and its preparation method and application. This type of elastomer is made from organic electroluminescent monomers, styrene and 1,3-butadiene through anionic polymerization. The innovation of the present invention is: for the first time, the organic electroluminescence unit is introduced into the elastomer by chemical crosslinking. On the basis of improving the intrinsic stretchability of the elastomer, at the same time, it has characteristics of excellent luminescence and high carrier mobility, novel structure and unique design strategy; meanwhile, it also solves the inherent non-stretchability problem of traditional organic optoelectronic materials and the problem that traditional elastomers do not have electroluminescent properties. This type of elastomer is used as a light-emitting layer material to prepare organic electroluminescent devices with high stability, high stretchability and high efficiency.

Abstract: A reconfigurable coupler based on a ridge gap waveguide. The reconfigurable coupler includes an inverted microstrip line, a ridge gap waveguide, and several reconfiguration components configured to adjust a coupling degree of a coupler, where the inverted microstrip line feeds the ridge gap waveguide with power, the inverted microstrip line is located at an upper layer while the ridge gap waveguide is located at a lower layer, the ridge gap waveguide includes an upper metal layer, a second dielectric layer and a lower metal layer that are arranged from top to bottom, the upper metal layer is in a square shape having a gap at a diagonal, four sides of the upper metal layer are provided with microstrip lines extending outward to the inverted microstrip line respectively, two sides of the gap are each provided with several isolation grooves, and the reconstruction components are arranged at the isolation grooves.

Abstract: A method for manufacturing a transparent electrode with a low surface roughness, in particular a method for preparing a large-area, low-cost and patterned transparent electrode using the screen-printing technology, which focuses on solving the problem of a high roughness of a screen-printed pattern. First, a substrate is coated with a layer of a smooth conductive material, then screen printing is performed to obtain a conductive pattern, and finally, a layer of a surfactant-modified composite conductive material is applied and film transfer printing is performed to obtain a transparent electrode with a low surface roughness. The transparent electrode prepared by the method retains a smooth surface of the original substrate after peeling, which has a remarkably low surface roughness and a significantly increased success rate of film transfer printing, and can be directly applied to various photoelectric devices, such as solar batteries, LEDs, flat panel displays and electronic sensors.