摘要:
Embodiments of the invention are directed to apparatus, methods, and applications involving the actuation of a semi-insulative working fluid by electromechanical forces based on electrowetting-on-dielectric (EWOD) and liquid dielectrophoresis (liquid DEP) mechanisms that are controlled by the frequency, but not the magnitude, of an AC voltage (i.e., ‘frequency-addressable). In the various apparatus embodiments of the invention, a single, frequency-addressable electrode pair includes at least one electrode that has a spatially-varying dielectric coating thickness and thus a spatially-varying electrode gap wherein at least a portion of which a volume of a working fluid can stably reside under no influence of an applied voltage. In an exemplary aspect, a frequency-addressable, bistable apparatus includes at least one wider gap and one narrower gap associated, respectively, with a thicker and a thinner dielectric coating thickness of the electrode(s). The working fluid resides in only one of the at least two gap regions only under the influence of capillary force. A brief burst of AC voltage at a selected high frequency or low frequency will move the liquid from one gap region to another (and back) by one of an EWOD-based and a DEP-based force. In an alternative aspect, an analog apparatus has a continuous, spatially-varying electrode gap in which the dielectric coating thickness on the electrodes varies smoothly in an inverse manner. Various applications to a display device, fiber optic coupler and attenuator, controlled liquid volume dispensers, spotting arrays, well plate apparatus, and others are presented, along with control methods.
摘要:
A downhole device configured to be inserted into a borehole includes a device body having an outer surface and a recess formed in the outer surface, a cover covering the recess to form a first cavity, and a shock-absorber configured to support an electrical module within the first cavity, the shock-absorber disposed between a base of the first cavity and the cover opposite the base. The downhole device also includes a vibration-damping layer disposed between the base of the first cavity and the cover, the vibration-damping layer configured to dampen vibration of the electrical module.
摘要:
A downhole device configured to be inserted into a borehole includes a device body having an outer surface and a recess formed in the outer surface and a cover covering the recess to form a first cavity, the cover forming a fluid-tight seal with the device body. The device includes at least one shock-absorber configured to support an electrical module within the first cavity, the at least one shock-absorber extending between a base of the cavity and an inner surface of the cover opposite the base. The device also includes a vibration-damping layer located on at least one of the base of the cavity and the inner surface of the cover, the vibration-damping layer configured to be in contact with a surface of the electrical module to dampen vibration of the electrical module.
摘要:
Embodiments of the invention are directed to apparatus, methods, and applications involving the actuation of a semi-insulative working fluid by electromechanical forces based on electrowetting-on-dielectric (EWOD) and liquid dielectrophoresis (liquid DEP) mechanisms that are controlled by the frequency, but not the magnitude, of an AC voltage (i.e., ‘frequency-addressable). In the various apparatus embodiments of the invention, a single, frequency-addressable electrode pair includes at least one electrode that has a spatially-varying dielectric coating thickness and thus a spatially-varying electrode gap wherein at least a portion of which a volume of a working fluid can stably reside under no influence of an applied voltage. In an exemplary aspect, a frequency-addressable, bistable apparatus includes at least one wider gap and one narrower gap associated, respectively, with a thicker and a thinner dielectric coating thickness of the electrode(s). The working fluid resides in only one of the at least two gap regions only under the influence of capillary force. A brief burst of AC voltage at a selected high frequency or low frequency will move the liquid from one gap region to another (and back) by one of an EWOD-based and a DEP-based force. In an alternative aspect, an analog apparatus has a continuous, spatially-varying electrode gap in which the dielectric coating thickness on the electrodes varies smoothly in an inverse manner. Various applications to a display device, fiber optic coupler and attenuator, controlled liquid volume dispensers, spotting arrays, well plate apparatus, and others are presented, along with control methods.
摘要:
A method and a system for transmitting multichannel data packets are disclosed in the present invention to implement the transmission of the multichannel data packets with the same network socket, and to improve the work efficiency of the multichannel data packet transmission. The method for transmitting multichannel data packets provided in the present invention comprises: creating a network socket which includes a routing cache array for caching the routing information of the multichannel data packets; acquiring the routing information of the multichannel data packets and adding the routing information to the routing cache array; acquiring the routing information of the multichannel data packets from the routing cache array when the multichannel data packets need to be transmitted and sending out the multichannel data packets according to the routing information.
摘要:
A method and system for implementing zero copy transmission of streaming media data are disclosed in the present invention, and the method and system are based on Linux network protocol stack. The method comprises: when a streaming media server receives a data request from a user equipment, it performs a system call of data transmission, reading the streaming media data out from the disk space and writing it into a user data buffer; packaging the streaming media data stored in the user data buffer as real-time transmission protocol packets which are transmitted applying streaming media packets whose head and load are separated. The method and system of the present invention sufficiently use the DMA function and SG (Scatter/Gather) function of a network card to implement zero-copy transmission of the streaming media data.