Abstract: A metal powder preparation system and method are provided. The metal powder preparation system includes a medium frequency smelting furnace, a homogeneous insulated quantitative pouring furnace, a precision-controlled liquid level temperature pouring ladle, and a plurality of groups of atomization mechanisms connected in sequence. The present application improves the preparation quality of the metal powder, so that the parameters such as the powder particle size, sphericity, fluidity, oxygen content, component distribution, and particle size distribution of the metal powder can all meet the requirements of high-quality metal additive manufacturing, achieving efficient and continuous preparation of the metal powder at the same time.

Abstract: In some implementations, an optical interference filter includes a substrate; and a set of layers that are disposed on the substrate, wherein the set of layers includes: a first subset of layers; and a second subset of layers; wherein: each of the first subset of layers includes an aluminum nitride (AlN) material, a stress of each of the first subset of layers is between ?1000 and 800 megapascals, the first subset of layers has a first refractive index with a first value, each of the second subset of layers includes at least one other material, the second subset of layers has a second refractive index with a second value that is different than the first value, and the optical interference filter has an effective refractive index greater than or equal to 95% of a highest value of the first value and the second value.

Abstract: In some implementations, an optical interference filter includes a substrate; and a set of layers that are disposed on the substrate, wherein the set of layers includes: a first subset of layers; and a second subset of layers; wherein: each of the first subset of layers includes an aluminum nitride (AlN) material, a stress of each of the first subset of layers is between ?1000 and 800 megapascals, the first subset of layers has a first refractive index with a first value, each of the second subset of layers includes at least one other material, the second subset of layers has a second refractive index with a second value that is different than the first value, and the optical interference filter has an effective refractive index greater than or equal to 95% of a highest value of the first value and the second value.

Abstract: In some implementations, an optical interference filter includes a substrate and one or more sets of layers that are disposed on the substrate. Each set of layers includes: a first layer that comprises at least tantalum and oxygen (e.g., a tantalum pentoxide (Ta2O5) material); a second layer that comprises at least aluminum and nitrogen (e.g., an aluminum nitride (AlN) material); and a third layer that comprises at least hydrogen and silicon (e.g., a hydrogenated silicon (Si:H) material). The second layer is disposed between the first layer and the third layer. In some implementations, a first surface of the second layer is disposed on a surface of the first layer, and a second surface of the second layer is disposed on a surface of the third layer.

Abstract: An optical interference filter includes one or more sets of layers. Each set of layers includes a first layer that includes at least aluminum and nitrogen (e.g., an aluminum nitride (AlN) material), a second layer that includes at least silicon and oxygen (e.g., a silicon dioxide (SiO2) material), and a third layer that includes at least hydrogen and silicon (e.g., a hydrogenated silicon (Si:H) material). The second layer is disposed between the first layer and the third layer.

Abstract: A platform gauge instrument and a platform gauge measuring method based on a photogrammetric principle are provided. According to the platform gauge instrument, measuring stations are arranged on both sides of a platform, and the measuring stations on both sides work together to ensure the acquisition of complete platform information. The measuring stations have automatic traveling capability to complete scanning of a whole platform, platform information obtained by the scanning is automatically resolved by a measuring system, and gauge dimensions such as a transverse dimension and a vertical dimension of a platform gauge are resolved through parameters such as object-space coordinates of platform edge points, a space equation of intersection lines of upper surfaces of rails and a measuring cross-section, and common tangent lines of the upper surfaces of two rails on the measuring cross-section, so that resident and real-time gauge high-precision detection of the platform is achieved.

Abstract: A platform gauge instrument and a platform gauge measuring method based on a photogrammetric principle are provided. According to the platform gauge instrument, measuring stations are arranged on both sides of a platform, and the measuring stations on both sides work together to ensure the acquisition of complete platform information. The measuring stations have automatic traveling capability to complete scanning of a whole platform, platform information obtained by the scanning is automatically resolved by a measuring system, and gauge dimensions such as a transverse dimension and a vertical dimension of a platform gauge are resolved through parameters such as object-space coordinates of platform edge points, a space equation of intersection lines of upper surfaces of rails and a measuring cross-section, and common tangent lines of the upper surfaces of two rails on the measuring cross-section, so that resident and real-time gauge high-precision detection of the platform is achieved.

Abstract: In some implementations, an optical interference filter includes a substrate; and a set of layers that are disposed on the substrate. The set of layers includes a first subset of layers, wherein the first subset of layers comprises an aluminum nitride (AlN) material; and a second subset of layers, wherein the second subset of layers comprises a hydrogenated silicon (Si:H) material.

Abstract: In some implementations, an optical interference filter includes a substrate; and a set of layers that are disposed on the substrate, wherein the set of layers includes: a first subset of layers; and a second subset of layers; wherein: each of the first subset of layers comprises an aluminum nitride (AlN) material, a stress of each of the first subset of layers is between ?1000 and 800 megapascals, the first subset of layers has a first refractive index with a first value, each of the second subset of layers comprises at least one other material, the second subset of layers has a second refractive index with a second value that is different than the first value, and the optical interference filter has an effective refractive index greater than or equal to 95% of a highest value of the first value and the second value.

Abstract: In some implementations, an optical interference filter includes a substrate; and a set of layers that are disposed on the substrate. The set of layers includes a first subset of layers, wherein the first subset of layers comprises an aluminum nitride (AlN) material; and a second subset of layers, wherein the second subset of layers comprises a hydrogenated silicon (Si:H) material.

Abstract: In some implementations, an optical interference filter includes a substrate; and a set of layers that are disposed on the substrate. The set of layers includes a first subset of layers, wherein the first subset of layers comprises an aluminum nitride (AlN) material, and wherein a stress of the first subset of layers is between ?1000 and 800 megapascals; and a second subset of layers, wherein the second subset of layers comprises at least one other material.

Abstract: The present disclosure discloses a preparation method of a energetic metal coordination compound with 5-methyltetrazole, belonging to the technical field of energetic metal coordination compounds. The method comprises: dissolving methyltetrazole in distilled water, and adding a nitrate therein, to obtain a mixture; stirring the mixture for 30 min, then putting the mixture into a teflon-lined reactor, and reacting at a constant temperature of 120±1° C. for 72 h, to obtain a crude reaction product; cooling the crude reaction product to 80° C., thermally insulating for 12 h, and hereafter cooling to room temperature at a rate of 3° C./h, to obtain a target product. The coordination compound has a good explosion heat, high thermal stability, and low mechanical sensitivity. The present disclosure could obtain a product with a high yield by a green and environment-friendly method.

Abstract: The present disclosure discloses a preparation method of a energetic metal coordination compound with 5-methyltetrazole, belonging to the technical field of energetic metal coordination compounds. The method comprises: dissolving methyltetrazole in distilled water, and adding a nitrate therein, to obtain a mixture; stirring the mixture for 30 min, then putting the mixture into a teflon-lined reactor, and reacting at a constant temperature of 120±1° C. for 72 h, to obtain a crude reaction product; cooling the crude reaction product to 80° C., thermally insulating for 12 h, and hereafter cooling to room temperature at a rate of 3° C./h, to obtain a target product. The coordination compound has a good explosion heat, high thermal stability, and low mechanical sensitivity. The present disclosure could obtain a product with a high yield by a green and environment-friendly method.

Abstract: A flexible display device and an unfolding detection method. The flexible display device comprises a flexible display screen, an accommodating housing, and a first light emitting element and a first light sensing element which are disposed opposite to each other. The flexible display screen comprises a plurality of first basic units arranged along an unfolding direction of the flexible display screen. The method comprises: the first light sensing element receives light emitted by the first light emitting element and generates a first light sensing parameter; a processor receives the first light sensing parameter; the processor determines a first unfolding length corresponding to the first light sensing parameter according to a relationship table of light sensing parameters and unfolding lengths; and the processor determines the first unfolding length to be an unfolding length of the flexible display screen extending out from the accommodating housing.

Abstract: A lighting device includes a pedestal, a supporting column, a flexible touch panel, and a light source assembly. One end of the supporting column is connected to the pedestal, and the other end of the supporting column is connected to the light source assembly. The flexible touch panel is attached on an outside surface of the supporting column, the flexible touch panel is electrically connected with the light source assembly, and the flexible touch panel is operable to sense a touch action to control a luminous state of the light source assembly. The brightness, color temperature and the like of the luminous state of the light source assembly may be controlled by touching the flexible touch panel. The flexible touch panel is set on the supporting column for a user to touch and operate, which improves the user's operating experience.

Abstract: A flexible display device and an unfolding detection method. The flexible display device comprises a flexible display screen, an accommodating housing, and a first light emitting element and a first light sensing element which are disposed opposite to each other. The flexible display screen comprises a plurality of first basic units arranged along an unfolding direction of the flexible display screen. The method comprises: the first light sensing element receives light emitted by the first light emitting element and generates a first light sensing parameter; a processor receives the first light sensing parameter; the processor determines a first unfolding length corresponding to the first light sensing parameter according to a relationship table of light sensing parameters and unfolding lengths; and the processor determines the first unfolding length to be an unfolding length of the flexible display screen extending out from the accommodating housing.

Abstract: An air eye cover is provided. The air eye cover includes a fixed gasbag, an air-filling control device and an air-exhausting control device. The air-filling control device and the air-exhausting control device both electrically connect to the control device. The fixed gasbag includes a first air inlet and a first air outlet. The air-filling control device hermetically connects to the first air inlet and is configured to fill air into the fixed gasbag through the first air inlet under control of the control device. The air-exhausting control device hermetically connects to the first air outlet and is configured to exhaust the air in the fixed gasbag through the first air outlet under control of the control device.

Abstract: A lighting device includes a pedestal, a supporting column, a flexible touch panel, and a light source assembly. One end of the supporting column is connected to the pedestal, and the other end of the supporting column is connected to the light source assembly. The flexible touch panel is attached on an outside surface of the supporting column, the flexible touch panel is electrically connected with the light source assembly, and the flexible touch panel is operable to sense a touch action to control a luminous state of the light source assembly. The brightness, color temperature and the like of the luminous state of the light source assembly may be controlled by touching the flexible touch panel. The flexible touch panel is set on the supporting column for a user to touch and operate, which improves the user's operating experience.

Abstract: A system includes an interface operable to detect a plurality of active audio streams in a plurality of multimedia streams, each multimedia stream associated with a particular user. The system further includes a processor operable to generate a text translation of each active audio stream and generate a script comprising the text translation of each active audio stream and an indication of the particular user associated with each active audio stream, the text translations being ordered according to times associated with the respective corresponding active audio stream.