Abstract:
Disclosed is an improved regeneration process and system for the regeneration of a spent FCC catalyst in a regenerator without vertical partitions by introducing different fluidization gas streams to different regions of a dense phase catalyst zone at the lower end of the regenerator such as a high velocity central region and a low velocity annular zone are formed, positioned below a common dilute catalyst phase.
Abstract:
A rapid diagnostic test system or process uses a single-use module that includes a photodetector. The photodetector generates an electrical signal representing a measurement of light from a test region on a medium such as a lateral-flow strip for a binding assay. For light measurement, the test medium can contain a labeling substance that attaches a persistent fluorescent structure such as a quantum dot to a target analyte, so that the photodetector measures fluorescent light. Multiple photodetectors and an optical system that separates or filters light of wavelengths corresponding to different fluorescent labeling substances allow simultaneous testing for multiple analytes. The single-use module can include a display or LED for visual indication of test results, or the electrical signal can be output for processing in a reusable module.
Abstract:
An access point (11) for a wireless local area network (10) transmits a beacon message during a service interval period (21). This beacon message identifies, in a preferred embodiment, those subscriber units to whom the access point will shortly be transmitting data. Subscriber units that are not identified in the beacon message and that do not have data themselves to transmit to the access point can implement a power conservation mode of operation until the next beacon message. Subscriber units that have data, such as voice information, to transmit can utilize the beacon message contents to at least estimate a likely time by when the access point will have concluded making its transmissions to the subscriber units. That estimated time can then be used to facilitate scheduling a time at which a given subscriber unit will contend for an opportunity to transmit its data to the access point. In a preferred embodiment, this scheduled transmission time can potentially occur either during a contention window that follows the service interval period or during a dynamic contention window that follows the transmissions of the access point and concludes with the conclusion of the service interval period. Subscriber units can then use intervening periods of time to effect their power conservation schemes of choice.
Abstract:
A medical fluid system includes a medical fluid pump; a container holding a fluid to be pumped by the medical fluid pump, the fluid at a first time having a first conductivity, the fluid at a second time having a second conductivity; and a radio frequency level sensor positioned in operable relation with the container, the radio frequency operation of the level sensor configured so as to be (i) indicative of a level of the fluid in the container and (ii) at least substantially independent of whether the fluid has the first conductivity or the second conductivity. The medical fluid system can determine the level of medical fluid by measuring the resistance, impedance or phase shift seen by the sensor.
Abstract:
An optical transceiver and method for bidirectionally communicating optical signals in an optical transceiver involve an optical element that bidirectionally separates incoming and outgoing optical signals of the same wavelength. The optical element can be a diffractive element such as a grating or, alternatively, a partially reflective element such as a transparent block having a thin-film coating.
Abstract:
A method and a system are provided for large-scale behavioral targeting for advertising over a network, such as the Internet. In one example, the system receives training data that is processed raw data of user behavior. The system generates selected features by performing feature selection on the training data. The system generates feature vectors from the selected features. The system initializes weights of a behavioral targeting model by scanning the feature vectors once. The system then updates the weights of the behavioral targeting model by scanning iteratively the feature vectors using a multiplicative recurrence.
Abstract:
A micro-current electrolysis-sterilization-algaecide device includes the solution conductivity detector installed in the inlet pipe of the tank, at least a group of electrodes set in the tank in accordance with the order of anode, auxiliary electrode, and cathode, and the controller, which judges the conductance values, controls the electrode polarity and the circuit connections. Said controller includes judging unit to determine the conductance values of water, and according to the results to trigger the corresponding seawater electrolysis-model unit, the fresh water electrolysis-model unit, or the pole-reversing electrolysis-model unit. The device can be used to the seawater and fresh water sterilization algaecide, with good bactericidal algaecide effect, automatic scaling, and a wide range of applications. By adding ultrasonic generator, the device can destroy a variety of bacteria and algae cells. Said device has a simple structure and a wide range of use.
Abstract:
A diffractive coupling element based on a computer-generated hologram is used in an optical coupling system of a transmitter to control the launch of laser light from a laser light source onto an end of an optical fiber. The diffractive coupling element controls the launch of the laser light such that a desired optical intensity distribution pattern is provided that substantially avoids the center and edge refractive index defects contained in the optical fiber.
Abstract:
A mobile terminal (302, 304) wakes up from a low power state and initiates a frame exchange in a wireless local area network that supports voice traffic by transmitting a polling frame (602). If the mobile terminal had voice data to send, it is included in the polling frame. In response to receiving the polling frame, the access point transmits a delay frame (604) to acknowledge receipt of the polling frame. If the access point has data for the polling mobile terminal, it transmits a non-delay frame (606) including the voice data, otherwise it transmits a null frame (702). The mobile terminal acknowledges the data from the access point (608), and goes back to sleep until the beginning of the next service interval.