摘要:
Systems and methods for operating linear motors, and for determining whether a linear motor has reached the end of its power and return strokes. In one embodiment, an electric drive controller of an ESP system monitors position signals received from the system's linear motor and determines transition time differentials, transition counts from the beginning of a stroke, elapsed stroke times and related parameters. If predetermined conditions relating to these parameters are met, the controller determines that the linear motor's mover has reached the end of its stroke. The controller therefore reverses the phase order of the drive's output power and thereby reverses the direction of the mover.
摘要:
Systems and methods for securely supporting devices such as reservoirs for surgical drains or catheters. In one embodiment, a surgical drain support apparatus comprises a sash having a first end and a second end. The sash has an opening such as a slit or a loop at the second end. When the first end is inserted through the opening, the sash forms an adjustable loop that is placed around a user's body (e.g., over the shoulder or around the waist), thereby supporting the apparatus on the user's body. The first end of the sash, which hangs downward from the large loop, has one or more compartments that hold surgical drain reservoirs. The first end of the sash also has a strap attached to it that can be wrapped around the user's body (e.g., around the leg) to hold the first end of the sash against the user's body.
摘要:
Systems and methods for communicating messages over a three-phase power cable between surface equipment and downhole equipment in a well. A transmitter parses messages into data bit pairs and generates a parity bit for each pair (a triplet). The bits of each triplet are concurrently but separately transmitted over the power cable. Each triplet is received from the power cable by a receiver and is decoded to identify the data bits. The receiver may verify the received bits and/or recover a lost bit in each triplet. The data bits are then reconstructed into the original message. Since each triplet has two bits, the effective data rate is twice the data rate of transmitting a single bit at a time. The parity bit enables recovery of data with a bit error rate of up to 1 in 3.
摘要:
Ultra-short pulsed laser radiation is applied to a patient's eye to create a row of bubbles oriented perpendicular to the axis of vision. The row of bubbles leads to a region of the eye to be ablated. In a second step, a femtosecond laser beam guided through the row of bubbles converts it to a channel perpendicular to the axis of vision. In a third step, a femtosecond laser beam is guided through the channel to ablate a portion of the eye. Using a femtosecond laser with intensity in the range of 1011-1015 W/cm2 for the second and third steps facilitates multi-photon ablation that is practically devoid of eye tissue heating. Creating bubbles in the first step increases the speed of channel creation and channel diameter uniformity, thereby increasing the precision of the subsequent multi-photon ablation.
摘要:
Systems and methods for lighting body panels of automobiles to facilitate repair of the body panels, where one embodiment is a portable lighting apparatus that includes a light board, a base and an extension member that connects the light board to the base. The light board is supported by the extension member, which is supported by the base. A battery in the base provides power through conductors in the extension member to light sources in the light board. The extension member has a conduit that holds the conductors therein and can rotate, thereby allowing the light board to rotate with respect to the base. A suction cup mount on the base enables the base to be secured to an automobile body panel, and the extension member allows the light board to be positioned as desired.
摘要:
Systems and methods for shear-corrected digital hologram acquisition, wherein the shear-corrected geometry is highly suited for two (or more) color operation with either broadband or laser illumination. An apparatus for shear-corrected recording of a spatially heterodyne hologram with broad-band or laser illumination includes: an illumination source; a beamsplitter optically coupled to said illumination source(s); a reference beam corner-mirror pair for translation and phase-shaping of the object beam optically coupled to the beamsplitter; an object optically coupled to the beamsplitter; a focusing lens optically coupled to both the reference beam corner-mirror pair and the object; and a digital recorder optically coupled to the focusing lens. A reference beam is incident upon the translating and phase-shaping corner-mirror pair, and the reference beam and an object beam are focused by the focusing lens at a focal plane of the digital recorder to form a spatially heterodyne hologram.
摘要:
Systems and methods for rotor bearings that enable improved oil circulation, wherein axial grooves are formed in the outer periphery of each bearing to form channels that allow axial flow of oil through the channels. Each bearing includes a collar, a sleeve and an interference ring. The collar has a bore through its center in which a rotatable sleeve is positioned. The outer periphery of the collar has a circumferential groove and at least one axial groove that extends from one face of the collar to the other. An axially permeable interference ring positioned within the circumferential groove extends radially outward from the groove beyond the outer periphery of the collar. The interference ring (e.g., a looped coil spring) allows fluid in the axial groove to flow through the interference ring. The axial groove may have a different depth than the circumferential groove.
摘要:
A forcible entry training device for use with overhead doors includes an adjustable frame that is designed to hold a variety of overhead doors of different sizes, and also includes an adjustable support that applies support from the back of the door and thereby provides structural integrity to the door so that multiple vertical cuts can be made through the door. In one embodiment, vertical members in the frame are adjustably connected to horizontal members. Clamps are provided in the vertical members to secure the edges of the overhead door to the frame. Adjustable-length stabilizing legs can be used to hold the frame and door in an upright position, even when resting on an uneven surface.
摘要:
Systems and methods for providing realistic simulation of forcible entry techniques using replaceable components that are designed to be deformed and/or destroyed during use. One embodiment includes a simulator having a door frame, a door pivotally mounted on the door frame, and at least one training station sub-unit that is mounted on either the door or the frame. The training station sub-unit includes at least one component that is designed to be destroyed and replaced (sometimes known as a “consumable” component). The consumable component is destroyed during use of the training station in order to produce a realistic training experience for the trainee using the station. The training station may be a door edge insert sub-unit that holds a consumable metal insert at an edge of the door proximal to the door latch, where the metal insert is deformed upon forcibly prying the door open.
摘要:
Systems and methods for interconnect planning which utilize probabilistic methodologies. One embodiment comprises a method for planning interconnect models in an integrated circuit design. Nets and a set of interconnect models that can be used to connect the pins of each net are first defined. For each net, the probability that each interconnect model will be used to connect the pins of the net is evaluated. Tiles in the integrated circuit design are then assigned probabilities indicating the likelihood that each of the interconnect models will traverse the tiles. A map is then generated to indicate probabilistic routing characteristics (e.g., probabilities of wire congestion, interconnect component congestion, power densities, interconnect model usage) based on the probabilities assigned to each of the tiles in the integrated circuit design. The map may then be output (e.g., printed or otherwise displayed) to a user or stored for later use.