Abstract: The present disclosure discloses a modeling method for a rail vehicle collision finite element dummy and simulation system, and relates to the technical field of rail transit. The method according to the present disclosure includes the following steps: S1: establishing a dummy finite element model with a characteristic parameter of a target human body; S2: establishing a multi-marshaling train collision finite element model considering a vehicle body collision energy-absorbing structure and wheel-rail rolling contact behavior; S3: establishing a rigid-flexible coupling model inside a rail vehicle; and S4: establishing a passive safety simulation and analysis system integrating the rail vehicle and the dummy finite element model.

Abstract: A high-speed train derailment arresting system is provided, which includes multiple passive protection arresting devices arranged on both sides of a high-speed railway line. The passive protection arresting device includes a rigid support assembly fixed on a respective side of the high-speed railway line and a rotating protective barrel arranged on the support assembly. A structural design method for the high-speed train derailment arresting system is further provided.

Abstract: A high-performance thermal interface comprising a nanowire array disposed between a bottom metal layer and a top metal layer in which each nanowire is coated with a 3D fuzzy graphene layer. The thermal interface can be used by bonding it to the surfaces of adjoining substrates using layers of solder.

Abstract: The present application provides a simulation method for equivalent fatigue damage of wheel-rail steel, and relates to the study of wheel-rail relationship of rail transportation. After obtaining the train load spectrum when the target train serves for the preset mileage, the wheel-rail systematic 3D model corresponding to the target train is assigned to simulate the load according to the train load spectrum to obtain the stress spectrum of the dangerous part of the rim, and determine the target stress and stress application frequency corresponding to the expected simulated mileage according to the stress spectrum of the dangerous part of the rim. Then, the driving fatigue test machine carries out fatigue tests on the wheel-rail steel fatigue sample of the target train according to the target stress and stress application frequency, and obtains the equivalent fatigue damage data of the wheel-rail steel at the expected simulated mileage of the target train.

Abstract: A high-performance thermal interface comprising a nanowire array disposed between a bottom metal layer and a top metal layer in which each nanowire is coated with a 3D fuzzy graphene layer. The thermal interface can be used by bonding it to the surfaces of adjoining substrates using layers of solder.

Abstract: A high-performance thermal interface comprising a nanowire array disposed between a bottom metal layer and a top metal layer in which each nanowire is coated with a 3D fuzzy graphene layer. The thermal interface can be used by bonding it to the surfaces of adjoining substrates using layers of solder.

Abstract: The present invention relates to the field of metal additive manufacturing, and disclosed thereby is a method for printing a structure of a combustion chamber liner by using GRCop-84 spherical powder. The method mainly comprises the following steps: (1) establishing a model; (2) configuring printing parameters; (3) performing laser printing; (4) performing annealing treatment; and (5) performing surface sandblasting. The present invention uses GRCop-84 spherical powder as the material of a combustion chamber liner model, and said material has excellent electrical conductivity, thermal expansion, strength, creep resistance, ductility, fatigue and like properties, and the comprehensive performance thereof is excellent, which significantly improves the performance of a rocket engine. In the GRCop-84 spherical powder material of the present invention, Cr and Nb form a Cr2Nb phase, and the volume fraction of a second phase is about 14%, same being evenly distributed in a copper matrix.

Abstract: A high-performance thermal interface comprising a nanowire array disposed between a bottom metal layer and a top metal layer in which each nanowire is coated with a 3D fuzzy graphene layer. The thermal interface can be used by bonding it to the surfaces of adjoining substrates using layers of solder.

Abstract: An inspection system for inspecting a semiconductor wafer. The inspection system comprises an illumination setup for supplying broadband illumination. The broadband illumination can be of different contrasts, for example brightfield and darkfield broadband illumination. The inspection system further comprises a first image capture device and a second image capture device, each configured for receiving broadband illumination to capture images of the semiconductor wafer while the semiconductor wafer is in motion. The system comprises a number of tube lenses for enabling collimation of the broadband illumination. The system also comprises a stabilizing mechanism and an objective lens assembly. The system further comprises a thin line illumination emitter and a third image capture device for receiving thin line illumination to thereby capture three-dimensional images of the semiconductor wafer.

Abstract: A system for inspecting semiconductor devices is provided. The system includes a region system selecting a plurality of regions from a semiconductor wafer. A golden template system generates a region golden template for each region, such as to allow a die image to be compared to golden templates from a plurality of regions. A group golden template system generates a plurality of group golden templates from the region golden templates, such as to allow the die image to be compared to golden templates from a plurality of group golden templates.

Abstract: An inspection system for inspecting a semiconductor wafer. The inspection system comprises an illumination setup for supplying broadband illumination. The broadband illumination can be of different contrasts, for example brightfield and darkfield broadband illumination. The inspection system further comprises a first image capture device and a second image capture device, each configured for receiving broadband illumination to capture images of the semiconductor wafer while the semiconductor wafer is in motion. The system comprises a number of tube lenses for enabling collimation of the broadband illumination. The system also comprises a stabilizing mechanism and an objective lens assembly. The system further comprises a thin line illumination emitter and a third image capture device for receiving thin line illumination to thereby capture three-dimensional images of the semiconductor wafer.

Abstract: A system for inspecting semiconductor devices is provided. The system includes a region system selecting a plurality of regions from a semiconductor wafer. A golden template system generates a region golden template for each region, such as to allow a die image to be compared to golden templates from a plurality of regions. A group golden template system generates a plurality of group golden templates from the region golden templates, such as to allow the die image to be compared to golden templates from a plurality of group golden templates.

Abstract: A dynamic pulse width modulation (PWM) amplifier comprising an input terminal, a dynamic PWM controller, a power stage, a low pass filter, and an output terminal. The input terminal receives an input signal. The dynamic PWM controller transforms the N-bit input signal sampled by a sampling frequency to a 1-bit PWM signal. The power stage receives and outputs the 1-bit PWM signal. The low pass filter receives and outputs the 1-bit PWM signal. The 1-bit PWM signal is used to drive the power stage and the low pass filter. The output terminal outputs the 1-bit PWM signal. The dynamic PWM amplifier is characterized in the dynamic PWM amplifier uses a register array to store the input signal processed immediately in each frame, regroups the input signal, and outputs the regroup signal, so that the 1-bit PWM signal is changed according to the input signal.

Abstract: A computer keyboard includes a keyboard body removably received and retained in an outer frame assembly. The outer frame assembly includes a rigid base, serving as a lower frame forming a first central cavity and having a front flange, and a soft pad including an upper frame forming a second central cavity and having a wrist support extending from the upper frame. The upper frame is stacked on the lower frame with the central cavities aligned with each other to define a space for receiving the keyboard body. The wrist support that is soft is positioned on and supported by the front flange of the lower frame to in turn support a user's wrists.

Abstract: A computer mouse includes a body having a bottom and a top cover mounted to the bottom to define therebetween an interior space for accommodating mechanical/electronic/optic components. The cover has front and rear portions separated by a partition wall. The front portions forms control buttons of the mouse. The rear portion has a surface from which pegs extend. A soft pad has a bottom defining holes fit over the pegs to fix the pad on the surface of the rear portion of the cover of the mouse.

Abstract: A dynamic pulse width modulation (PWM) amplifier comprising an input terminal, a dynamic PWM controller, a power stage, a low pass filter, and an output terminal. The input terminal receives an input signal. The dynamic PWM controller transforms the N-bit input signal sampled by a sampling frequency to a 1-bit PWM signal. The power stage receives and outputs thel-bit PWM signal. The low pass filter receives and outputs the 1-bit PWM signal. The 1-bit PWM signal is used to drive the power stage and the low pass filter. The output terminal outputs the 1-bit PWM signal. The dynamic PWM amplifier is characterized in the dynamic PWM amplifier uses a register array to store the input signal processed immediately in each frame, regroups the input signal, and outputs the regroup signal, so that the 1-bit PWM signal is changed according to the input signal.