Abstract: A MXene membrane with gradient pores, its preparation method and application are provided. The MXene membrane with gradient pores, excluding the substrate, includes the following layers in sequence from bottom to top: an ultra large pore MXene membrane layer with a thickness of 0-30 nanometers (nm) and a pore size of 2-5 nm; a large pore MXene membrane layer with a thickness of 0-30 nm and a pore size of 0.9-1.2 nm; a medium pore MXene membrane layer with a thickness of 20-50 nm and a pore size of 0.6-0.8 nm; and a small pore MXene membrane layer with a thickness of 40-60 nm and a pore size of 0.3-0.5 nm. The present disclosure prepares the MXene membrane with gradient pores by repeating spin-coating and plasma irradiation while limiting the irradiation time.

Abstract: An event timing-based method and apparatus for fiber-optic frequency transfer are provided, relating to the fields of time-frequency transfer and precision time measurement. According to the method, an event timer is used to detect a time stamp of each rising edge of a radio frequency (RF) signal, which reflects a link delay jitter, a reference time stamp is subtracted from the time stamp to obtain a phase error, and an actuator is driven to compensate the phase error, thereby improving tolerance of a system to link noise while ensuring the stability of optical frequency transfer. Thus, the link delay jitter is suppressed, ensuring that a phase of an output transferred beam remains in long-term stability with a phase of an input reference light.

Abstract: A method and an apparatus for optical frequency comb locking are provided, relating to the field of frequency control of optical frequency combs. A first electrical signal and second electrical signal outputted by an optical frequency comb system are acquired. Target carrier-envelope offset (CEO) frequency control data and target repetition rate control data are generated based on the first electrical signal, second electrical signal, a CEO frequency radio frequency (RF) reference signal and repetition rate RF reference signal. A first and a second decoupling module synchronously perform decoupling on the data to obtain a first control quantity and second control quantity. The first digital-to-analog converter converts the first control quantity into a first control signal, and simultaneously the second digital-to-analog converter converts the second control quantity into a second control signal. The first and second control signals are inputted to the optical frequency comb system after amplified.

Abstract: A method for a multi-screen interaction system for an augmented reality scene, information processing devices, and a non-transitory computer-readable storage medium are provided. In the method, a resource object of the augmented reality scene, in which an augmented reality marker is embedded, is displayed. An augmented reality effect play message is received from a second device of the multi-screen interaction system for the augmented reality scene through a communication connection. An augmented reality resource associated with the augmented reality effect play message is displayed in response to the received augmented reality effect play message.

Abstract: The separation of ethane from its corresponding ethylene is a very important, challenging and energy-intensive process in the chemical industry. Herein we report a microporous metal-organic framework Fe2(O2)(dobdc) (dobdc4?: 2,5-dioxido-1,4-benzenedicarboxylate) with Fe-peroxo sites for the preferential binding of ethane over ethylene and thus highly selective separation of C2H6/C2H4. Neutron powder diffraction studies and theoretical calculations demonstrate the key role of Fe-peroxo sites for the recognition of ethane. The high performance of Fe2(O2)(dobdc) for the ethane/ethylene separation has been validated by gas sorption isotherms, ideal adsorbed solution theory calculations, simulated and experimental breakthrough curves. Through a fixed-bed column packed with this porous material, polymer-grade of ethylene (99.

Abstract: A method for a multi-screen interaction system for an augmented reality scene, information processing devices, and a non-transitory computer-readable storage medium are provided. In the method, a resource object of the augmented reality scene, in which an augmented reality marker is embedded, is displayed. An augmented reality effect play message is received from a second device of the multi-screen interaction system for the augmented reality scene through a communication connection. An augmented reality resource associated with the augmented reality effect play message is displayed in response to the received augmented reality effect play message.

Abstract: A cleaning water supply device contains a mixing unit including a channel assembly and a circular valve member, wherein the channel assembly includes an inlet channel, an outlet channel, a through channel between the inlet and the outlet channels, and at least one intake communicating with the through channel; the valve member is installed in the through channel and includes a flexibly circular wing formed therein to abut against and close the through channel so that the intake is stopped communicating with the inlet channel and the outlet channel, and when the vacuum attraction generates in the through channel, the inlet and the outlet channels are opened; a storing unit connected with the channel assembly of the mixing unit and including a chamber to receive a cleaning fluid and an output tunnel communicating with the chamber and the intake.

Abstract: A cleaning water supply device contains a mixing unit including a channel assembly and a circular valve member, wherein the channel assembly includes an inlet channel, an outlet channel, a through channel between the inlet and the outlet channels, and at least one intake communicating with the through channel; the valve member is installed in the through channel and includes a flexibly circular wing formed therein to abut against and close the through channel so that the intake is stopped communicating with the inlet channel and the outlet channel, and when the vacuum attraction generates in the through channel, the inlet and the outlet channels are opened; a storing unit connected with the channel assembly of the mixing unit and including a chamber to receive a cleaning fluid and an output tunnel communicating with the chamber and the intake.