Abstract: This application provides a covert transmission method against active and passive cooperative attacks in a cognitive radio network. This method uses a joint design of noise uncertainty and power uncertainty to combat powerful collusion eavesdroppers. Then, the error detection probability of collusion eavesdroppers in the network and the covert transmission performance of legitimate users are analyzed. Finally, the numerical results show that the proposed scheme can guarantee the covert performance of the system, and can also resist the active and passive cooperative attacks of the collusive eavesdropper.

Abstract: Provided is an earphone, including: a shell including a receiving cavity and a sound outlet connecting the receiving cavity with an exterior, the sound outlet being divided into at least two cavities, the at least two cavities including a first sound outlet cavity; and a first speaker received in the receiving cavity and configured to generate a high-frequency sound. The first sound outlet cavity extends from an encapsulation sound-output surface of the first speaker toward the exterior to output the high-frequency sound. The sound pressure level in a frequency range above 5kHz is effectively improved, and the acoustic performance of the earphone is improved.

Abstract: A diamond drill bit has a blade, a cutting tooth, at least one cushioning module rotatably connected to a drill bit body. A cushioning portion of the cushioning module is eccentrically arranged with respect to a rotation axis of the cushioning module. The cushioning module interacts with rock to achieve, in a rotating manner, the contraction and extension trend movement of the cushioning portion on the cushioning module with respect to the cutting teeth. Under the working conditions of guide drilling, composite drilling and other complex movement or under the conditions of drilling in a hard stratum and an uneven stratum, the cushioning portion performs an extension trend movement when the cutting teeth of the blades are subjected to impact loads, so as to achieve the purposes of absorbing impact loads and reducing or avoiding impact damage of the cutting teeth.

Abstract: A floating pusher includes a vertical rod having upper and lower ends, a connection assembly connected to the upper end, an upper flange fitted on the vertical rod in a movable manner and located below the connection assembly, a lower flange fitted on the vertical rod in a movable manner and located below the upper flange, an upper spring fitted onto the vertical rod and compressed between the upper flange and the connection assembly, and a lower spring fitted onto the vertical rod and compressed between the upper flange and the lower flange. An elastic coefficient of the lower spring is smaller than that of the upper spring. The connection assembly connects to a crimping machine to move synchronously with a crimping tool. The lower flange pushes on a floating holder holding a hard wire to push, and keep, the floating holder to a predetermined position.

Abstract: An image sensor and a control method are provided. The image sensor includes an optical-to-electrical conversion unit, a signal readout unit, and a conversion gain determining unit, the optical-to-electrical conversion unit includes a photodiode, and the signal readout unit includes a floating diffusion node, a dual conversion gain transistor, and a first capacitor. The floating diffusion node is configured to store a charge corresponding to an electrical signal obtained by converting incident light by the photodiode. The conversion gain determining unit is configured to compare a magnitude of a cathode voltage of the photodiode with a magnitude of a reference voltage, and output a control voltage based on a comparison result, wherein the control voltage is used to control the dual conversion gain transistor to be turned on or off.

Abstract: The present disclosure relates to compositions and methods for enhancing T cell response in vivo. For example, a method of enhancing T cell response in a subject or treating a subject having cancer, the method comprising: administering an effective amount of a composition comprising modified cells to the subject having a form of cancer associated with or expressing an antigen, for example, a solid tumor antigen; and administering (1) a nucleic acid encoding the antigen, (2) additional modified cells comprising the nucleic acid or the antigen, or (3) microorganisms, for example cold viruses, comprising the nucleic acid or the antigen. In embodiments, the modified cells comprise mixed cells targeting a solid tumor antigen and a white blood cell (WBC) antigen. In embodiments, the modified cells comprise a dominant negative form of an immune checkpoint molecule (e.g., PD-1). In embodiments, the modified cells comprise an exogenous polynucleotide encoding a therapeutic agent, such as IL-12 and IFN?.

Abstract: Provided are a detergent compartment and a laundry processing device. The detergent compartment includes a first receiving cavity. The top of the first receiving cavity is provided with a water inlet. A water inlet assembly is disposed at the water inlet and configured to pressurize a water flow passing through the water inlet and direct the water flow onto the sidewall of the first receiving cavity.

Abstract: Disclosed is an industrial extraction method of cannabidiol, pertaining to the field of medicine and chemical industry. The present invention aims to resolve the problems of difficulty in wax removal, low extraction rate of cannabidiol, and excessively high content of tetrahydrocannabinol during extraction using conventional solvents in the prior art. The extraction method employs raw material pretreatment, granulation, extraction, liquid-liquid extraction, decolorization, concentration, and other processes, such that wax removal from an extracted liquid is improved, the purity of a crude cannabidiol oil can be increased to 60%, and 40% of tetrahydrocannabinol can be removed. The method has high extraction yields and low costs, and can be implemented in large-scale industrial production.

Abstract: A soft pressure sensor comprises a stretchable top electrode, a stretchable bottom electrode, and an array of peaked structures between the stretchable top and bottom electrodes. The peaked structures comprise protruding regions of a continuous film conformally overlying an array of stiffening electrodes on the stretchable bottom electrode, where a tip of each protruding region is in contact with the stretchable top electrode and a base of each stiffening electrode is in contact with the stretchable bottom electrode. The soft pressure sensor includes one or more spacers extending between and bonded to the stretchable top electrode and the continuous film on the stretchable bottom electrode, where each of the one or more spacers is positioned outside the array of peaked structures. A capacitance measured by the soft pressure sensor is substantially invariant under in-plane stretching and/or bending.

Abstract: The invention provides a multi-site dual-function base editor and use thereof. Dual editing of multiple sites under the guidance of a single crRNA array is realized by using a constructed single-plasmid editor backbone, through the composition and structure optimization of a fusion protein formed of a cytosine deaminase, UGI, an adenine deaminase, and dCas12a. On this basis, the multi-site editing efficiency is further improved through the promoter replacement, the introduction and optimization of a synthetic spacing sequence in the crRNA array and the modification of a DR motif. Finally, the function of the multi-site dual-function base editor is verified through the generation of a multi-resistance strain, the de novo generation of a riboflavin producing strain, and the increased yield of a surfactin producing strain. According to the invention, the operable range of the dual-function base editor on the genome is widened.

Abstract: An electroacoustic transducer structure includes: a base; an actuating mechanism including an annular fixed part that surrounds the first direction and is fixed to the base, a first actuating arm and a second actuating arm which are formed in the fixed part, respectively, the fixed part having a first end and a second end that are oppositely oriented in a second direction, the first actuating arm extending from the first end of the fixed part till adjacent the second end of the fixed part, the second actuating arm extending from the second end of the fixed part till adjacent the first end of the fixed part; and a diaphragm. The electroacoustic transducer structure as disclosed may produce a higher SPL.

Abstract: Apparatuses and methods for regulating a system rail voltage of a battery charger is described. An integrated circuit can be configured to detect a condition that requires an activation of a trickle charge mode of a battery charger. The integrated circuit can, in response to the detection, set a reference voltage to an intermediate voltage level. The reference voltage can control a system rail voltage of the battery charger, and the intermediate voltage level can be greater than a minimum of the system rail voltage. The integrated circuit can reduce the reference voltage from the intermediate voltage level to the minimum system rail voltage to regulate the system rail voltage at a predefined rate.

Abstract: A flexible circuit board includes an inner wiring substrate, a first cover film, a second cover film, a first adhesive block, and two outer wiring substrates. The inner wiring substrate includes a dielectric layer, and the dielectric layer includes a first flat portion, a second flat portion, and a foldable portion connecting the first flat portion and the second flat portion. The first cover film is disposed on the first flat portion and located between the first flat portion and the second flat portion. The second cover layer is disposed on the second flat portion and is located between the first flat portion and the second flat portion. The first adhesive block bonds the first cover film and the second cover film, and the inner wiring substrate is located between the two outer wiring substrate. A method for manufacturing the flexible circuit board is also disclosed.

Abstract: Provided in the embodiments of the present disclosure are an animation data generation method, an animation data playback method, and a device and a storage medium. The animation data generation method comprises: acquiring an image set to be processed, wherein said image set at least comprises a first image frame and a second image frame, the first image frame is an animation starting frame of a target animation, and the second image frame is a next image frame adjacent to the first image frame; acquiring a frame difference picture according to the first image frame and the second image frame, wherein the frame difference picture represents different content of the second image frame than the first image frame; and according to the first image frame and the frame difference picture, generating animation data corresponding to the target animation.

Abstract: A handheld cutting tool includes a housing; a motor supported by the housing; a saw chain driven by the motor to implement a cutting function; a guide plate for supporting and guiding the saw chain; and an oil tank supported by the housing and configured to store a lubricant to lubricate the saw chain or the guide plate, where the oil tank includes a tank body formed with an oil injection port and a cap for sealing the oil injection port; and the tank body is formed with a protrusion portion capable of shielding at least part of the cap.

Abstract: An optical module including a circuit board and an optical modulation chip. The optical modulation chip includes a first and second substrates, an optical modulator, and a second coupling waveguide. A modulation driver is formed on one side of the optical modulator. A transimpedance amplifier is disposed on the first substrate. An optical demodulator is disposed on the second substrate. A first coupling waveguide is formed on one side of the optical demodulator. A first via is formed through the first substrate from an end of the optical demodulator toward the circuit board to electrically connect the optical demodulator to the circuit board; and a second via is formed through the first substrate from a bottom surface of the transimpedance amplifier toward the circuit board to electrically connect the transimpedance amplifier to the circuit board and electrically connect the optical demodulator to the transimpedance amplifier.

Abstract: A compound NMNH calcium salt, in particular a polymorph of a reduced ?-nicotinamide mononucleotide calcium salt and a preparation method therefor, a use thereof as a pharmaceutical ingredient, a health care product ingredient and a cosmetic ingredient or as a food additive, and a formulation containing same, belonging to the field of medicines, health care products, cosmetics and food additives. For the NMNH calcium salt polymorph, the crystal thereof displays long-term continuous stability, and compared with NMNH disodium salt, has significantly superior stability performance and anti-hygroscopic properties, and is more beneficial to long-term storage, promotion and market application. The NMNH calcium salt crystal is simple in preparation process, easy to control and suitable for large-scale production.

Abstract: An optical module includes a first port, a second port, and a third port. An optical path in an optical transmitting direction is from the first port to the second port, and an optical path in an optical receiving direction is from the second port to the third port. A light beam input from the first port may be a dual-polarized light beam, so that the first port can be connected to a normal optical fiber instead of a polarization maintaining optical fiber. In addition, the first port and the third port are disposed side by side on a same side of the optical module, the first port is configured to be connected to an optical transmitting module, the third port is configured to be connected to an optical receiving module.

Abstract: A regenerative device based on solid-state elastocaloric refrigeration and heating, and a refrigeration and heating device are disclosed. The regenerative device includes a fixing mechanism, solid-state elastocaloric refrigeration/heating materials each provided with a perforation and arranged in sequence in the fixing mechanism, a driving mechanism, and a sleeve. The fixing mechanism and the driving mechanism are arranged in the sleeve. The driving mechanism includes a movable pressure head provided with a through hole. The movable pressure head extends into the fixing mechanism to apply stress to or remove stress from the solid-state elastocaloric refrigeration/heating materials. The perforations on the solid-state elastocaloric refrigeration/heating materials are aligned to form a channel. The channel is in fluid communication with the through hole to allow a heat-transfer fluid to perform heat exchange with heat generated by the solid-state elastocaloric refrigeration/heating materials.

Abstract: The present disclosure provides a double-sided composite reinforced rockwool board, a production equipment, and a preparation method. The double-sided composite reinforced rockwool board has a length ranging from 600 mm to 2400 mm, a width ranging from 600 mm to 2400 mm, and a thickness ranging from 20 mm to 200 mm. The double-sided composite reinforced rockwool board comprises a rockwool base layer and two reinforced surface layers. The two reinforced surface layers are respectively bonded by a binder to two opposite surfaces of the rockwool base layer along a thickness direction. The 90° peel strength between any one of the two reinforced surface layers and the rockwool base layer ranges from 4N/75 mm to 30N/75 mm.