Abstract: The present invention provides a laser, including: a medium, having a ground state, an intermediate state, and an excited state in ascending order of energy; an excitation system, configured to excite electrons in the medium from the ground state to the intermediate state; and an excitation laser, configured to drive electrons in the intermediate state at different spatial positions in the medium to the ground state through a stimulated emission process with a fixed phase relationship, to generate a laser with a shorter relative wavelength. Due to the use of an excitation laser to drive electrons from the intermediate state, the photons generated by the stimulated emission have coherence, thereby forming a laser.

Abstract: Provided are a method for assaying a specific IgM antibody and a total antibody for the 2019 novel coronavirus (2019-nCOV), a method for determining whether subjects are infected with 2019-nCOV, and a virus antigen and a kit for carrying out the above-mentioned detection.

Abstract: The present invention provides a laser, including: a medium, having a ground state, an intermediate state, and an excited state in ascending order of energy; an excitation system, configured to excite electrons in the medium from the ground state to the intermediate state; and an excitation laser, configured to drive electrons in the intermediate state at different spatial positions in the medium to the ground state through a stimulated emission process with a fixed phase relationship, to generate a laser with a shorter relative wavelength. Due to the use of an excitation laser to drive electrons from the intermediate state, the photons generated by the stimulated emission have coherence, thereby forming a laser.

Abstract: One embodiment provides a method, including: acquiring a first form parameter of at least one electronic device; determining whether the first form parameter meets a first preset condition; determining whether a display of the at least one electronic device is in a first state; generating a control instruction when the first form parameter meets the first preset condition and the display is in the first state; and executing the control instruction. Other aspects are described and claimed.

Abstract: An undulator comprises at least M permanent magnet periods arranged sequentially in a transmission direction of electron beams, each of the permanent magnet periods comprises four rows of permanent magnet structures, in which each row comprises N rows of permanent magnet groups, and each row of the permanent magnet groups comprises K permanent magnet units, wherein M, N and K are natural numbers greater than or equal to 1; the four rows of the permanent magnet structures are pairwise matched, then relatively disposed on both sides of the transmission direction of electron beams, and are capable of forming at least one composite magnetic fields by relative displacement, such that elliptically polarized light, circularly polarized light, or linearly polarized light with an arbitrary polarization angle of 0°˜360° is generated when electron beams pass through the composite magnetic fields, and such that velocity directions of electrons are deviated from an axis direction of the undulator.

Abstract: A pressure wave system comprises a plurality of modules (200). Each module (200) comprises a plurality of pressure wave transducer elements, and connection means (216, 218, 220) operable to connect the modules together in each of a plurality of different configurations. The modules can form a transmitter array having a plurality of different shapes each associated with one of the configurations.

Abstract: A backlight control method and an electronic device are provided. The backlight control method, comprises: determining an input state of an electronic device; and adjusting a backlight brightness parameter of an input area of the electronic device according to the input state of the electronic device, wherein the backlight brightness parameter of the input area of the electronic device is adjusted from a plurality of backlight luminance values that indicate a plurality of backlight brightness levels of the input area.

Abstract: An undulator comprises at least M permanent magnet periods arranged sequentially in a transmission direction of electron beams, each of the permanent magnet periods comprises four rows of permanent magnet structures, in which each row comprises N rows of permanent magnet groups, and each row of the permanent magnet groups comprises K permanent magnet units, wherein M, N and K are natural numbers greater than or equal to 1; the four rows of the permanent magnet structures are pairwise matched, then relatively disposed on both sides of the transmission direction of electron beams, and are capable of forming at least one composite magnetic fields by relative displacement, such that elliptically polarized light, circularly polarized light, or linearly polarized light with an arbitrary polarization angle of 0°˜360° is generated when electron beams pass through the composite magnetic fields, and such that velocity directions of electrons are deviated from an axis direction of the undulator.

Abstract: One embodiment provides a method, including: acquiring a first form parameter of at least one electronic device; determining whether the first form parameter meets a first preset condition; determining whether a display of the at least one electronic device is in a first state; generating a control instruction when the first form parameter meets the first preset condition and the display is in the first state; and executing the control instruction. Other aspects are described and claimed.

Abstract: A backlight control method and an electronic device are provided. The backlight control method, comprises: determining an input state of an electronic device; and adjusting a backlight brightness parameter of an input area of the electronic device according to the input state of the electronic device, wherein the backlight brightness parameter of the input area of the electronic device is adjusted from a plurality of backlight luminance values that indicate a plurality of backlight brightness levels of the input area.

Abstract: Provided is an image type electron spin polarimeter. It at least comprises a scattering target, a two-dimensional electron detector and an electron bending unit, wherein the electron bending unit is used for bending the orbit of the incident (scattered) electrons to a first (second) angle to arrive the scattering target (two-dimensional electron detector) with an optimal incident angle, and to transfer the image of the electron intensities from the entrance plane (scattering target) to the scattering target (two-dimensional electron detector) with small aberrations, and to separate the orbits of incident and scattered electrons to increase the degree of freedom of the geometric configuration of each component of the spin polarimeter.

Abstract: Provided is an image type electron spin polarimeter. It at least comprises a scattering target, a two-dimensional electron detector and an electron bending unit, wherein the electron bending unit is used for bending the orbit of the incident (scattered) electrons to a first (second) angle to arrive the scattering target (two-dimensional electron detector) with an optimal incident angle, and to transfer the image of the electron intensities from the entrance plane (scattering target) to the scattering target (two-dimensional electron detector) with small aberrations, and to separate the orbits of incident and scattered electrons to increase the degree of freedom of the geometric configuration of each component of the spin polarimeter.