Abstract: A learning control system for a nano-precision motion stage comprises a closed-loop feedback section including a motion trajectory generator, a feedback controller, a motion stage, and a first Fourier transformer; and a feedforward section including a second Fourier transformer, a learning controller, an iteration backward shift operator, and a Fourier inverse transformer. An iteration experiment count j is initialized as j=1, and a j-th frequency domain feedforward signal is initialized to 0; the system is run to collect a frequency domain error signal and a frequency domain position measurement signal; a (j+1)-th frequency domain feedforward signal is updated; and an iteration experiment count j is incremented by 1. The present disclosure can effectively suppress the influence of external noise and disturbances, and improve convergence performance.

Abstract: A water-blocking air-permeable modular constructed wetland capable of aerating intermittently includes an aerobic reaction zone, an anoxic reaction zone, a soil plant zone and an aeration pipe; and the aerobic reaction zone, the anoxic reaction zone and the soil plant zone are communicated in turn along a bottom-up water discharging direction, the aerobic reaction zone includes an air-permeable water-blocking layer and an air-insulating layer that are arranged at interval from inside to outside, and an aeration port of the aeration pipe is located in a cavity, enclosed by the air-permeable water-blocking layer and the air-insulating layer.

Abstract: A method for preparing a microbattery includes: placing a micromachined thin metal-based interdigital electrode into a nickel sulfate and ammonium sulfate solution with a certain concentration; rapidly constructing a three-dimensional porous structure on the surface of the interdigital microelectrode by a bubble-templated electrodeposition method; then, mixing 3,4-ethylenedioxythiophene and manganese acetate with a certain constructing concentration; a manganese dioxide/3,4-ethylenedioxythiophene polymer thin film by a cyclic voltammetry deposition method; combining an obtained interdigital microelectrode cathode with a zinc interdigital anode; and then, coating the surface of the assembled electrode with a manganese sulfate/zinc sulfate/xanthan gum gel electrolyte, and conducting packaging to obtain the microbattery.

Abstract: A dynamic decoupling control method for a multi-degree-of-freedom precision comprises defining a dynamic decoupling controller and parameterizing elements in the form of a finite impulse response (FIR) filter, applying a nominal decoupling control method to measure an actual position signal of an actual system and an output of a nominal decoupling controller, calculating a virtual control quantity, and optimizing an indicator function to obtain an estimated value of a coefficient to be optimized of the dynamic decoupling controller. Decoupling at medium and high frequency bands can be effectively realized with improved accuracy of decoupling, and an algorithm flow is simplified. The method is prone to engineering implementation.

Abstract: A method for dynamic output force distribution of a multi-degree-of-freedom over-actuated motion stage includes: establishing a mathematical model G(s) of a motion stage based on a modal representation; setting a time delay interval parameter ?? and an instruction shaper order nCS, and calculating each pulse time delay parameter ?i; calculating matrices Tb and Vb; initializing q=1; defining Hq; calculating intermediate variable {tilde over (T)}jq, {tilde over (V)}, ?Hq, YHq, T?Hq, V?Hq, and ?q; calculating an estimated value ?q of Hq; obtaining an amplitude Aikq of an instruction shaper; q=q+1, until calculation is completed for all logical axis channels; calculating ?(s) by using Aikq; and obtaining a dynamic output force distribution matrix Tf(s). Zero-residue vibration suppression in all controllable flexible modalities can be realized with finite actuator redundancies.

Abstract: The sensing system includes at least one chip branch. In the chip branch, a clock circuit of each sensing chip integrates the received working clock signal to obtain stable clock signal that has a relative high frequency to be subjected to frequency dividing, and a frequency dividing circuit performs frequency dividing processing on the clock signal to obtain a working clock signal required by a next-stage sensing chip. In the cascade structure, a clock source only needs to satisfy the driving requirement of a first-stage sensing chip, and the working clock signal required by each of other sensing chips is provided by a previous-stage sensing chip, such that the problem that the number of sensing chips connected in series in the chip branch is limited by the driving capability of the clock source is solved, and the applicability of the sensing system is widened.

Abstract: Embodiments of the present disclosure provide a waveform control method, a radio device, a radio signal, a signal transmission link and an integrated circuit. The waveform control method includes: calling, by a chip structure, at least two types of frame-configuration parameters from an external storage and storing the frame-configuration parameters in a memory; acquiring a frame order, and calling corresponding frame-configuration parameters from the memory in sequence according to the frame order; and generating frame period signals according to the corresponding frame-configuration parameters. The frame period signals include at least two frames of signals.

Abstract: A method for reducing influence of a remote reference power noise on signal quality is provided. A remote reference power plane connected to a power module is identified according to a schematic diagram of signal design, and a noised power plane is determined. A position of the noised power plane is found in a PCB, and whether the noised power plane is remote referenced by a high-speed signal is judged. Placement positions and number of connection capacitors are determined according to a layout and routing position of the high-speed signal and a width of the noised power plane. Two capacitors with fixed capacitance values are placed at the placement positions of the connection capacitors. Connection capacitors are added to a position of a noised remote reference power plane of a signal line for connecting the power plane and the ground.

Abstract: A precise coordination control system includes a trajectory generator, a closed-loop system of a first motion stage, and a closed-loop system of a second motion stage. The precise coordination control method includes: initializing an iteration experiment count j to 1 and feedforward control signals of two motion stages to 0; performing the jth iteration experiment and running the coordination control system; updating the feedforward control signals of the two motion stages; and continuing next iteration and stopping the iteration experiment until a coordination motion error meets a precision requirement. Both of respective servo errors of two motion stages and the coordination motion error of the two motion stages can be reduced. A learning coefficient is designed by using an adaptive method to provide an increased convergence rate, high robustness to external random disturbances, and good anti-disturbance capability.

Abstract: The present disclosure provides a damper and an anti-irritable tractor, which relates to the field of pet traction devices and solves the problems that the damper has a short service life and the tractor is easy to lose the anti-irritable effect. The damper comprises a magnetic component and a damping plate, which are magnetically adsorbed and synchronously rotate or stand still when the rotating speed of a winding reel is less than the set speed; when the rotating speed of the winding reel exceeds the set speed, either of the magnetic component and the damping plate is connected with the winding reel, and the other of the magnetic component and the damping plate is connected with a stationary part, and when the magnetic component and the damping plate rotate relatively, the magnetic adsorption force between the magnetic component and the damping plate forms the resistance to limit the rotation of the winding reel.

Abstract: A method, an apparatus and a device for detecting an optical module, and a storage medium are provided. The method includes: constructing insertion loss ranges meeting an insertion loss specification that respectively correspond to different signal frequencies in a predetermined signal frequency range, to construct a target insertion loss region; acquiring a microstripline length, a stripline length, a via number and a connector number of a to-be-detected optical module; inputting the microstripline length, the stripline length, the via number and the connector number to a pre-constructed first model, to determine an insertion loss curve of the to-be-detected optical module in the signal frequency range; and determining that the to-be-detected optical module is unqualified if a part of the insertion loss curve is outside the target insertion loss region.

Abstract: A method and system for reducing influence of a remote reference power noise on signal quality are provided. A remote reference power plane connected to a power module is identified according to a schematic diagram of signal design, and a noised power plane is determined. A position of the noised power plane is found in a PCB, and whether the noised power plane is remote referenced by a high-speed signal is judged. Placement positions and number of connection capacitors are determined according to a layout and routing position of the high-speed signal and a width of the noised power plane. Two capacitors with fixed capacitance values are placed at the placement positions of the connection capacitors. Connection capacitors are added to a position of a noised remote reference power plane of a signal line for connecting the power plane and the ground.

Abstract: A method, an apparatus and a device for detecting an optical module, and a storage medium are provided. The method includes: constructing insertion loss ranges meeting an insertion loss specification that respectively correspond to different signal frequencies in a predetermined signal frequency range, to construct a target insertion loss region; acquiring a microstripline length, a stripline length, a via number and a connector number of a to-be-detected optical module; inputting the microstripline length, the stripline length, the via number and the connector number to a pre-constructed first model, to determine an insertion loss curve of the to-be-detected optical module in the signal frequency range; and determining that the to-be-detected optical module is unqualified if a part of the insertion loss curve is outside the target insertion loss region.

Abstract: An analysis method and an analysis system for optimization of a high-speed signal connector are provided. The method includes: setting an excess portion of each of a pin and a pad in the high-speed signal connector to be different lengths; equating the excess portion of each of the pin and the pad with an inductor and a capacitor; analyzing performance of connectors having different lengths of the excess portion of the pin and different lengths of the excess portion of the pad, and comparing performance parameters of the connectors; and obtaining a length of the excess portion of the pin and a length of the excess portion of the pad in a case of an optimal performance parameter, and cutting the pin and the pad based on the obtained lengths.

Abstract: A permeability enhancement method for coalbed methane wells by using electric pulse detonation fracturing technology is applicable to exploitation of coalbed methane wells in coal beds with low permeability. Firstly, a positive electrode coalbed methane wellbore and a negative electrode coalbed methane wellbore are constructed from the ground surface to a coal bed. A fixed platform installed with a positive electrode and a high-voltage pulse device are placed, by using a derrick, downwards to a predetermined permeability enhancement portion of the coal bed in the positive electrode coalbed methane wellbore, and another fixed platform installed with a negative electrode is placed, by using a derrick, downwards to a predetermined permeability enhancement portion of the coal bed in the negative electrode coalbed methane wellbore.

Abstract: The present disclosure discloses a biaryl urea ROR?t inhibitor, and specifically relates to a biaryl urea derivative, as represented by formula I, with an ROR?t inhibiting activity, and a preparation process thereof, and a pharmaceutical composition comprising the compound. Further disclosed is use of the compound for treating an ROR?t-related disease.

Abstract: The present disclosure discloses a biaryl urea ROR?t inhibitor, and specifically relates to a biaryl urea derivative, as represented by formula I, with an ROR?t inhibiting activity, and a preparation process thereof, and a pharmaceutical composition comprising the compound. Further disclosed is use of the compound for treating an ROR?t-related disease.

Abstract: A permeability enhancement method for coalbed methane wells by using electric pulse detonation fracturing technology is applicable to exploitation of coalbed methane wells in coal beds with low permeability. Firstly, a positive electrode coalbed methane wellbore and a negative electrode coalbed methane wellbore are constructed from the ground surface to a coal bed. A fixed platform installed with a positive electrode and a high-voltage pulse device are placed, by using a derrick, downwards to a predetermined permeability enhancement portion of the coal bed in the positive electrode coalbed methane wellbore, and another fixed platform installed with a negative electrode is placed, by using a derrick, downwards to a predetermined permeability enhancement portion of the coal bed in the negative electrode coalbed methane wellbore.