摘要:
A MEMS variable optical attenuator (VOA) chip includes a frame having a planar surface, a micro-electric actuator with a movable optical shutter arranged with respect to the planar surface of the frame, where the VOA is actuated by thermal expansion. The micro-electric actuator comprises semiconductor conductors (“wires”) that can be moved, upon applying an electrical current, by thermal expansion. In one embodiment, the MEMS VOA chip is configured in a multiple wire arrangement that restricts the shutter movement in a plane.
摘要:
A MEMS variable optical attenuator (VOA) chip includes a frame having a planar surface, a micro-electric actuator with a movable optical shutter arranged with respect to the planar surface of the frame, where the VOA is actuated by thermal expansion. The micro-electric actuator comprises semiconductor conductors (“wires”) that can be moved, upon applying an electrical current, by thermal expansion. In one embodiment, the MEMS VOA chip is configured in a multiple wire arrangement that restricts the shutter movement in a plane.
摘要:
An optical switch including a bistable component, a reflective component, the reflective component being operatively connected to the bistable component, a first electrothermal bent beam actuator, a first contacting component operatively connected to the first electrothermal bent beam actuator component, the first electrothermal bent beam actuator component and the first contacting component disposed such as to enable advancing the bistable component the reflective component from a first stable configuration to a second stable configuration, a second electrothermal bent beam actuator component and a second contacting component operatively connected to the second electrothermal bent beam actuator component, the second electrothermal bent beam actuator component and the second contacting component disposed such as to enable advancing the bistable component and the reflective component from the second stable configuration to the first stable configuration.
摘要:
The present disclosure provides a displacement amplification structure and a method for controlling displacement. In one aspect, the displacement amplification structure of the present disclosure includes a first beam and a second beam substantially parallel to the first beam, an end of the first beam coupled to a fixture site, and an end of the second beam coupled to a motion actuator; and a motion shutter coupled to an opposing end of the first and second beams. In response to a displacement of the motion actuator along an axis direction of the second beam, the motion shutter displaces a distance along a transversal direction substantially perpendicular to the axis direction.
摘要:
An optical device is provided for electrically changing light beam properties, comprising an electro-optical (EO) material positioned in a light beam path, a metal plate to which the EO material is attached, and a first soft metal layer attached to at least to the first surface of the EO material. A method is also provided for dampening resonant vibration in an EO material, comprising forming a bar from an EO material, providing a metal plate, and soldering a first surface of the EO bar to a surface of the metal plate with a soft metal alloy.
摘要:
An application of 2,3-dihydro-3 hydroxymethyl-6-amino-[1,4]-benzoxazine in the preparation of drugs inducing embryonic stem cells to differentiate to vascular endothelial cells, wherein the concentration of the 2,3-dihydro-3 hydroxymethyl-6-amino-[1,4]-benzoxazine in the preparation of drugs effectively inducing mouse embryonic stem cells to differentiate to vascular endothelial cells is 1˜20 μM. The 2,3-dihydro-3 hydroxymethyl-6-amino-[1,4]-benzoxazine provided by the invention lays foundation for preparing and developing drugs inducing embryonic stem cells to differentiate to vascular endothelial cells, can be used as an effective research tool of embryonic stem cells, and can be used for researching on embryonic stem cell differentiation and new molecular mechanisms of blood vessel formation.
摘要:
Head smut is one of the most devastating diseases in maize, causing severe yield loss worldwide. The present invention describes the fine-mapping of a major QTL conferring resistance to head smut. Markers useful for breeding, and methods for conferring head smut resistance are described. Nucleic acid sequence from the genetic locus conferring head smut resistance is disclosed. Genes encoding proteins conferring head smut resistance are disclosed.
摘要:
A method and system for identifying documents relevant to a query that specifies a part of speech is provided. A retrieval system receives from a user an input query that includes a word and a part of speech. Upon receiving an input query that includes a word and a part of speech, the retrieval system identifies documents with a sentence that includes that word collocated with a word that is used as that part of speech. The retrieval system displays to the user an indication of the identified documents.
摘要:
The present invention discloses a method for indicating a modulation mode in HSDPA, comprising the following steps: a NodeB receiving capability information reported by a terminal, if determining that the terminal supports 64QAM modulation mode, determining a transmission block size, a modulation mode and code channel resource to be indicated based on an capability constraint condition and the capability information, and if the determined modulation mode is the same as a basic modulation mode satisfying requirement of the transmission block size, setting modulation mode information of a HS-SCCH as 0, otherwise setting the modulation mode information of the HS-SCCH as 1, and then sending the HS-SCCH to the terminal. Application of the present invention is compatible with a UE device which supports or does not support 64QAM high order modulation, without changing the current frame structure of the HS-SCCH, thereby achieving functional support of the 64QAM modulation mode.