Abstract: The invention discloses a pure end-to-end deep reinforcement learning for training car racing game AI bot that uses only the velocity information extracted from screen for both training and testing phases without using any internal state from game environment, such as the car facing angle. The learned AI bot can play better than the average performance of human players. In addition, the reward function is designed to consist only the velocity value, and use Ape-X distributed training framework combined with a variant of Deep Q Network to solve the sparse training signal problem caused by the reward function of an original design. Moreover, limit learner rate method is designed that improves the training efficiency and training performance. The AI bot trained in this way can achieve performance beyond the average human level and reach a level close to professional players.

Abstract: The present disclosure provides a system for signal optimization adjustment based on different heat source information. The system includes a plurality of heat source measurers, a first system chip, a second system chip, an electrical interconnection, and a bit error risk evaluator. The first system chip includes a signal transmitter, and the second system chip includes a signal receiver. The second system chip provides an electrical characteristic state of the signal receiver, and a signal adjustment information of the signal transmitter and/or the signal receiver. The bit error risk evaluator performs a signal optimization adjustment for an electrical characteristic of the signal receiver according to the electrical characteristic state. The present disclosure further provides a method for signal optimization adjustment.

Abstract: This application provides an information processing method and apparatus, an electronic device, a computer program product, and a non-transitory computer-readable storage medium. The method includes: obtaining an information stream and a promotion video in response to a user trigger operation, the information stream including at least one piece of media information and the promotion video including at least one material to be recommended; and displaying, at a first area of an information stream interface, a first part of the promotion video in a presentation mode and displaying, at a second area of the information stream interface, a second part of the promotion video in a transparent mode, so as to enable the information stream interface to be revealed through the second area, the first area and the second area being dynamically changing areas.

Abstract: A coaxial board connector includes: a first insulator; a first inner conductor having an upper mating portion and a lower first connecting portion; a first outer conductor having a lower third connecting portion; a second insulator; a second inner conductor having an upper second connecting portion and a lower tail portion; and a second outer conductor and having an upper fourth connecting portion and a lower fixing portion, wherein the first insulator sits on the second insulator and has an arc-shaped lower face, the first connecting portion is in contact with the second connecting portion and the third connecting portion is in contact with the fourth connecting portion, and the first connecting portion is able to sway relative to the second connecting portion and the third connecting portion is able to sway relative to the third connecting portion under the action of the arc-shaped lower face.

Abstract: A board connector includes: a metal housing having a base portion, four mating tubes opening forward, and four receiving grooves opening through a rear face and a bottom face of the base portion and communicating with corresponding mating tubes; four terminal assemblies received and retained in corresponding receiving grooves; and a rear plate, wherein the base portion of the metal housing has a rear guiding slot and a supporting portion at each side wall thereof, the supporting portions extend horizontally, the rear plate slides into the rear guiding slots from the bottom face, and the supporting portions block a bottom face of the rear plate from moving downwardly.

Abstract: A wet etching control system includes a liquid level detector, an etching agent spraying component, a cleaning agent spraying component and controller. The liquid level detector is configured to detect a liquid level of leakage liquid in a leakage liquid collection tank, and the controller is configured to control the etching agent spraying component to stop a spraying of an etching agent onto a surface of a wafer, and control the cleaning agent spraying component to spray a cleaning agent onto the surface of the wafer when the liquid level of the leakage liquid is greater than a first preset value.

Abstract: A board coaxial connector includes: a first insulator, a first inner conductor retained in the first insulator and having a mating portion and a first connecting portion extending out of the first insulator, a first outer conductor having a third connecting portion and retaining the first insulator, a second outer conductor mounted on the circuit board and having a fourth connecting portion, and a second inner conductor having a second connecting portion and a tail portion mounting on the circuit board, wherein the first connecting portion is connected with the second connecting portion, the third connecting portion is connected with the fourth connecting portion, and the first connecting portion of the first inner conductor is movable to slightly deviate from an axis of the second inner conductor.

Abstract: A coaxial connector includes: a shell integrally formed as a unitary piece; and an insulator and a conductive contact retained to the insulator, the contact having an upper contacting portion and a lower contacting portion extending out of the insulator, wherein the shell includes a first mating tube opening upwards, a second mating tube opening upward and disposed in the first mating tube, a receiving cavity opening downward, and a third mating tube disposed in the receiving space, the insulator is assembled and fixed in the shell, and the upper contacting portion is exposed to the second mating tube and the lower contacting portion is exposed to the third mating tube.

Abstract: A virtual reality acupuncture system contains a virtual reality device comprising: a head-mounted display for viewing a virtual scene model and a mannequin, and a joystick for tracking hand movements for needle insertion determination; an computing host that transmits data with a head-mounted display and constructs an acupoint database, and an acupuncture virtual reality application which is executed to build a virtual reality model, in which the acupuncture virtual reality application constructs a situational scene model for simulating the actual condition of the consultation room; and a virtual 3D spherical acupoint model of the human body, which has a sphere area located at a certain depth below the skin surface, and has a skin distance model, so that the needle can sense the distance depth after touching the skin, which can be used to determine whether the needle position is not outside the sphere area.

Abstract: An electrical connector includes: a metallic housing having a base portion and at least one tube portion extending, the tube portion defining a first cavity opening forwards, the base portion defining a second cavity communicating with the first cavity, the second cavity opening rearward and downwards, at least one terminal module received in the first cavity and the second cavity, each terminal module including an insulator and at least one terminal retained in the insulator, the terminal having a contacting portion and a leg portion extending out of the insulator; and a metallic cover attached to a rear face of the base portion of the metallic housing, wherein the base portion defines at least two stopping portions blocking against a rear of the metallic cover, and the at least two stopping portions are formed by extruding and deforming the rear face of the base portion.

Abstract: A method for improving an etching rate of wet etching involves an etching reaction chamber used for etching work. The etching reaction chamber is connected with an etchant supply mechanism. The etchant supply mechanism is connected with a purified water supply mechanism. The purified water supply mechanism injects purified water into the etchant supply mechanism according to a change range of pH of the etchant in the etchant supply mechanism to ensure that a hydrogen ion concentration and a fluoride ion concentration of the etchant in the etchant supply mechanism are stable.

Abstract: This invention discloses a herbal composition for treating or preventing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), including the wild type and its different variant strains. The composition comprises the extract of Platycodon grandiflorum, which showed the synergistic inhibitory effect of infection compared to the Anti-epidemic No. 1 (AN1) consisted of Astragalus membranaceus, Atractylodes macrocephala, Saposhnikovia divaricata, Atractylodes lancea, Pogostemon cablin, Glehnia littoralis, Lonicera japonica and Cyrtomium fortunei.

Abstract: The present application provides a wafer cleaning equipment and a wafer cleaning method. During wafer cleaning operation, the landing position of a cleaning agent sprayed by a nozzle onto the surface of a wafer can be detected, and when the landing position produces a deviation, the measures of controlling a nozzle adjusting mechanism to adjust the position and/or spray angle of the nozzle, controlling a flow rate adjusting unit to adjust the flow rate of the cleaning agent sprayed by the nozzle, etc. are taken, so that the landing position of the cleaning agent sprayed by the nozzle onto the surface of the wafer is within a preset target region.

Abstract: A semiconductor structure, fabrication method and three-dimensional memory are disclosed. A method of fabricating a semiconductor structure includes providing a substrate including a first device region and a second device region; forming a plurality of first recesses in the first device region and a second recess in the second device region, the first recesses and the second recess being formed simultaneously; forming a first isolation trench in the first device region; and forming a second isolation trench in the second device region at a position of the second recess.

Abstract: The present disclosure provides a semiconductor device. The semiconductor device includes a transistor in active area. The active area is in a substrate and comprises a recess, a surface of the recess having an offset from a surface of the substrate. The transistor comprises a gate electrode, the gate electrode comprising a first portion in the recess and a second portion outside the recess.

Abstract: A semiconductor device and a method of fabricating the semiconductor device are provided. The method includes: forming a first bottom isolation layer and a second bottom isolation layer in a substrate, the thickness of the second bottom isolation layer being less than that of the first bottom isolation layer; and forming, on the a first active area in the substrate, a first gate structure extending to the first bottom isolation layer and forming, on a second active area in the substrate, a second gate structure extending to the second bottom isolation layer.

Abstract: A method for improving an etching rate of wet etching involves an etching reaction chamber used for etching work. The etching reaction chamber is connected with an etchant supply mechanism. The etchant supply mechanism is connected with a purified water supply mechanism. The purified water supply mechanism injects purified water into the etchant supply mechanism according to a change range of pH of the etchant in the etchant supply mechanism to ensure that a hydrogen ion concentration and a fluoride ion concentration of the etchant in the etchant supply mechanism are stable.

Abstract: A wet etching control system includes a liquid level detector, an etching agent spraying component, a cleaning agent spraying component and controller. The liquid level detector is configured to detect a liquid level of leakage liquid in a leakage liquid collection tank, and the controller is configured to control the etching agent spraying component to stop a spraying of an etching agent onto a surface of a wafer, and control the cleaning agent spraying component to spray a cleaning agent onto the surface of the wafer when the liquid level of the leakage liquid is greater than a first preset value.

Abstract: A tactile feedback device including a wearable device and a host is provided. The wearable device includes an acceleration sensor and an electrical stimulation generator. The acceleration sensor detects a movement state of a target object to obtain acceleration data. The electrical stimulation generator generates and transmits electrical stimulation to the target object according to a tactile control signal. The host includes a calculation circuit for calculating a displacement amount of the target object with respect to the host according to a signal attenuation amount of a radio wave signal and performing a calculation operation according to the displacement amount and the acceleration data to generate movement track information indicating a movement of the target object. The calculation circuit compares the movement track information with an object position in a display image to generate the tactile control signal. An operation method of the tactile feedback device is also provided.

Abstract: A tactile feedback device including a wearable device and a host is provided. The wearable device includes an acceleration sensor and an electrical stimulation generator. The acceleration sensor detects a movement state of a target object to obtain acceleration data. The electrical stimulation generator generates and transmits electrical stimulation to the target object according to a tactile control signal. The host includes a calculation circuit for calculating a displacement amount of the target object with respect to the host according to a signal attenuation amount of a radio wave signal and performing a calculation operation according to the displacement amount and the acceleration data to generate movement track information indicating a movement of the target object. The calculation circuit compares the movement track information with an object position in a display image to generate the tactile control signal. An operation method of the tactile feedback device is also provided.