Abstract: An optical defocus lens includes: a first lens layer and at least one liquid crystal lens layer, where the first lens layer is a concave lens, a convex lens, or a plano lens, a refractive index of liquid crystal molecules in each of the at least one liquid crystal lens layer is controlled by an electric field, to converge or diverge polarized light that is incident to a direction of each liquid crystal lens layer to form a focal point; a first liquid crystal lens layer is configured to converge or diverge polarized light in a first direction to form a first focal point; and the first lens layer or a second liquid crystal lens layer is configured to converge or diverge polarized light in a second direction to form a second focal point.

Abstract: A method for monitoring a box-type object and a related apparatus are provided, for example, a monitoring device (200) or a container. The monitoring device (200) includes: a transmitting module (210), a receiving module (220), and a processing module (230). The transmitting module (210) and the receiving module (220) are located on a to-be-monitored box (130) and/or located in an area that is on a transport device of the box (130) and that is relatively static with the box (130); the transmitting module (210) is configured to transmit a test signal; the receiving module (220) is configured to receive the test signal; and the processing module (230) is configured to: determine a channel characteristic based on an electrical signal corresponding to the test signal, and determine, based on the channel characteristic and an initial channel characteristic, whether a state of the box (130) changes.

Abstract: A lens, glasses, and a lens adjustment method are provided. The lens includes a first lens layer. The first lens layer includes a plurality of liquid crystal regions. At least one liquid crystal region forms a first optical region. At least one liquid crystal region forms a second optical region. Optical powers of the liquid crystal regions may be changed by controlling rotation of liquid crystal molecules in the liquid crystal regions separately included in the first optical region and the second optical region, so that an optical power of the first optical region can be different from an optical power of the second optical region.

Abstract: An optical defocus lens includes: a first lens layer and at least one liquid crystal lens layer, where the first lens layer is a concave lens, a convex lens, or a plano lens, a refractive index of liquid crystal molecules in each of the at least one liquid crystal lens layer is controlled by an electric field, to converge or diverge polarized light that is incident to a direction of each liquid crystal lens layer to form a focal point; a first liquid crystal lens layer is configured to converge or diverge polarized light in a first direction to form a first focal point; and the first lens layer or a second liquid crystal lens layer is configured to converge or diverge polarized light in a second direction to form a second focal point.

Abstract: A pacing signal processing method, a system and an electrocardiogram (ECG) monitor, the method includes collecting at a high sampling rate the original ECG signal from a surface, obtaining the parameter and position information of a pacing signal according to the sampling points, and displaying the pacing signal morphology and/or parameter information of the pacing signal.

Abstract: A pacing signal processing method, a system and an electrocardiogram (ECG) monitor, the method includes collecting at a high sampling rate the original ECG signal from a surface, obtaining the parameter and position information of a pacing signal according to the sampling points, and displaying the pacing signal morphology and/or parameter information of the pacing signal.

Abstract: A pacing signal processing method, a system and an electrocardiogram (ECG) monitor, the method includes collecting at a high sampling rate the original ECG signal from a surface, obtaining the parameter and position information of a pacing signal according to the sampling points, and displaying the pacing signal morphology and/or parameter information of the pacing signal.