Lin Zhou
Lin Zhou, Eagan, MN US
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20080273260 | Method and apparatus for detecting proximity contact between a transducer and a medium - A method and apparatus are provided for positioning a transducer relative to a track of a data storage medium and inducing lateral modulation of transducer the relative to the track. An element of the transducer is actuated toward the storage medium during the lateral modulation, and atomic interaction is detected between the element and the storage medium because of a change in a response to the lateral modulation of the transducer due to the atomic interaction. | 11-06-2008 |
20080276696 | ATOMIC FORCE MICROSCOPY OF SCANNING AND IMAGE PROCESSING - A topographic profile of a structure is generated using atomic force microscopy. The structure is scanned such that an area of interest of the structure is scanned at a higher resolution than portions of the structure outside of the area of interest. An profile of the structure is then generated based on the scan. To correct skew and tilt of the profile, a first feature of the profile is aligned with a first axis of a coordinate system. The profile is then manipulated to align a second feature of the profile with a second axis of the coordinate system. | 11-13-2008 |
20100235956 | ATOMIC FORCE MICROSCOPY TRUE SHAPE MEASUREMENT METHOD - An atomic force microscopy (AFM) method includes a scanning probe that scans a surface of a structure to produce a first structure image. The structure is then rotated by 90° with respect to the scanning probe. The scanning probe scans the surface of the structure again to produce a second structure image. The first and second structure images are combined to produce best fit image of the surface area of the structure. The same method is used to produce the best fit image of a flat standard. The best fit image of the flat standard is subtracted from the best fit image of the structure to obtain a true topographical image in which Z direction run out error is substantially reduced or eliminated. | 09-16-2010 |
20110007423 | Supplemental Layer to Reduce Damage from Recording Head to Recording Media Contact - Recording heads for data storage systems are provided. Recording heads include a substrate layer made of a first material. The substrate layer has a bearing surface side. A tapered feature made of a second material is included on the bearing surface side. The first material is illustratively a multiphase material and the second material is illustratively diamond-like carbon. | 01-13-2011 |
20110138505 | SCANNING PROBE MICROSCOPY EMPLOYING CORRELATION PATTERN RECOGNITION - An apparatus and associated method for topographically characterizing a workpiece. A scanning probe obtains topographical data from the workpiece. A processor controls the scanning probe to scan a reference surface of the workpiece to derive a first digital file and to scan a surface of interest that includes at least a portion of the reference surface to derive a second digital file. Correlation pattern recognition logic integrates the first and second digital files together to align the reference surface with the surface of interest. | 06-09-2011 |
20120042422 | VARIABLE PIXEL DENSITY IMAGING - A method and associated apparatus for topographically characterizing a workpiece. The workpiece is scanned with a scanning probe along a first directional grid, thereby scanning a reference surface and an area of interest subportion of the reference surface, at a variable pixel density including a first pixel density outside the area of interest and a second pixel density inside the area of interest to derive a first digital file characterizing topography of the workpiece. The workpiece is further scanned along the reference surface and the area of interest with the scanning probe along a second directional grid that is substantially orthogonal to the first directional grid and at a constant pixel density to derive a second digital file characterizing topography of the workpiece. A processor executes computer-readable instructions stored in memory that generate a topographical profile of the workpiece in relation to the first and second digital files. | 02-16-2012 |
20120079635 | METHODS AND DEVICES FOR CORRECTING ERRORS IN ATOMIC FORCE MICROSCOPY - In certain embodiments, a probe scans a surface to produce a first scan. The first scan is used to estimate a vertical offset for scanning the surface to produce a second scan. In certain embodiments, an AFM device engages a probe to a surface using a piezo voltage. The probe scans the surface to produce a first scan. The first scan is used to estimate a vertical offset such that the probe uses the piezo voltage to engage the surface for a second scan at a different vertical position. | 03-29-2012 |
20120218659 | CONTACT DETECTION - A method of detecting a contact between a transducing head and a storage medium is provided. The method applies an input signal, having a select power level and known frequency, to an actuator for actuating the head. An output signal is obtained in response to the input signal. At least one signal component is extracted from the output signal at the same or a harmonic of the same known frequency as the input signal applied to the actuator. Whether the at least one extracted signal component indicates a contact between the head and the medium is determined. The power level of the applied wave pattern is increased incrementally until the extracted signal component indicates a contact between the head and the storage medium. | 08-30-2012 |
20120300335 | Tribological Monitoring of a Data Storage Device - A system that is capable of monitoring tribological data, such as friction, in a data storage device. In accordance with various embodiments, a magnetoresistive head is separated from a rotating data storage media by an air bearing and attached to a slider that is adjusted through deformation controlled by a heating element. A measurement circuit concurrently monitors friction from the head and power applied to the heating element to determine an MR head clearance. The measurement circuit includes at least a phase filter that eliminates off-phase friction from contributing to the determination of the MR head clearance. | 11-29-2012 |
20130081159 | ADVANCED ATOMIC FORCE MICROSCOPY SCANNING FOR OBTAINING A TRUE SHAPE - Advanced atomic force microscopy (AFM) methods and apparatuses are presented. An embodiment may comprise performing a first scan at a first angle, a second scan at a second angle, and correcting a system drift error in the first scan based on the second scan. Another embodiment may comprise performing a global scan of a first area, a local scan of a second area within the first area, correcting a leveling error in the local scan based on the global scan, and outputting a corrected sample image. Another embodiment may comprise performing a first scan at a first position at a first angle, a second scan at a flat region using the same scan angle and scan size to correct a scanner runout error in the first scan based on the second scan. | 03-28-2013 |
20140254040 | HEAD-MEDIUM CONTACT DETECTION USING INTRODUCED HEAT OSCILLATION - An apparatus includes a head transducer configured to interact with a magnetic recording medium and a heater configured to thermally actuate the head transducer. A thermal sensor at or near the head transducer is configured to produce a sensor signal. Circuitry is coupled to the heater and configured to cause an oscillation in heater power. The heater power oscillation causes an oscillation in the sensor signal. A detector is coupled to the thermal sensor and configured to detect head-medium contact using the oscillating sensor signal and heater power. | 09-11-2014 |
20140254341 | Friction Force Measurement Assembly and Method - The application discloses a sensor device to measure friction force at a head-media interface. As disclosed, the sensor device has a transducer element oriented to provide an electrical output responsive to force or strain imparted to the transducer element along an in-plane axis. Sensor circuitry is coupled to the transducer element to process the electrical output to provide an output measure of friction force. In illustrated embodiments, the head includes an actuator element which is powered on/off at an on/off frequency to cyclically protrude a localized portion of the head. The on/off frequency of the actuator is used by the sensor circuitry to detect excitation of the sensor device due to friction force at the head-media interface. | 09-11-2014 |
20140254344 | Contact Detection - A method of detecting a contact between a transducing head and a storage medium is provided. The method applies an input signal, having a select power level and known frequency, to an actuator for actuating the head. An output signal is obtained in response to the input signal. At least one signal component is extracted from the output signal at the same or a harmonic of the same known frequency as the input signal applied to the actuator. Whether the at least one extracted signal component indicates a contact between the head and the medium is determined. The power level of the applied wave pattern is increased incrementally until the extracted signal component indicates a contact between the head and the storage medium. | 09-11-2014 |
20140269241 | HIGH SAMPLE RATE DPES TO IMPROVE CONTACT DETECTION SIGNAL TO NOISE RATIO - Using a high sample rate dPES, together with pulsed heater and lock-in technique, to improve dPES SNR for contact detection between the head and media surface. Steps of powering a transducing head actuator with pulsed input signal at a select data track offset from a previously-written to data track of the storage medium, where the pulsed input signal has select amplitude and duty cycle to simulate a response signal, and further locking in an amplitude with respect to the heater frequency, can lead to a determination of level of heater power for initiating contact between the transducing head and the storage medium. | 09-18-2014 |
20150103432 | METHODS AND DEVICES FOR HEAD-MEDIA CONTACT DETECTION - In certain embodiments, a head-suspension assembly includes a resonator attached to either a head or gimbal. The resonator is configured to resonate at a predefined resonant frequency. In certain embodiments, disc drives includes a recording medium, a head-suspension assembly, and a resonator. The resonator is attached to either a head or gimbal of the head-suspension assembly. The resonator is configured to resonate at a predefined resonant frequency. | 04-16-2015 |
Lin Zhou, Hockessin, DE US
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20100196869 | SYSTEM AND METHOD FOR PROVIDING EDUCATIONAL COURSES - A system and method for providing educational course data includes receiving identification data of a first educational course of a first educational institution from a client machine and retrieving educational course equivalency data from a database based on the identification data. The educational course equivalency data is transmitted to the client machine. The educational course equivalency data may include identification data of a second educational course of a second educational institution. The educational course equivalency data may indicate that the first and second educational courses are directly equivalent. The method may also include retrieving course information related to the second educational course based on a request and transmitting the course information to the client machine. | 08-05-2010 |
20100255454 | SYSTEM AND METHOD FOR MANAGING EDUCATIONAL COURSES - A system and method for managing educational courses includes receiving educational course data from a client machine and retrieving educational course equivalency data from a database based on such data. The educational course equivalency data is transmitted to the client machine. The educational course equivalency data includes identification data of a first course of the first educational institution and/or identification of a second educational course of a second educational institution. The educational course equivalency data may indicate that the first and second educational courses are directly equivalent, indirectly equivalent, and/or reciprocally equivalent educational courses. A user may accept the second educational course as an equivalent of the first educational course, request that the second educational institution accept the first educational course as an equivalent educational course to the second educational course, request additional information, or request opinions from other reviewers as to the equivalency of the first and second courses. | 10-07-2010 |
Lin Zhou, Shenzhen CN
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20090285395 | SYSTEM AND METHOD FOR GENERATING ANALOG-DIGITAL MIXED CHAOTIC SIGNAL, ENCRYPTION COMMUNICATION METHOD THEREOF - A system and method for generating analog-digital mixed chaotic signal and an encryption communication method thereof are provided. In the system and method, the complementarity between continuous chaotic systems ( | 11-19-2009 |
Lin Zhou, Action, MA US
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20090256683 | CONFIGURATION MANAGEMENT SYSTEM AND METHOD FOR USE IN AN RFID SYSTEM INCLUDING A MULTIPLICITY OF RFID READERS - A system and method that facilitates the configuration and control of components of a radio frequency identification (RFID) system, taking into account how the RFID system components are associated with one or more physical locations within an environment in which the RFID system is deployed. The RFID system can be controlled by obtaining a representation of the physical space. Next, at least one region of interest is specified in the representation of the physical space. An interrogation zone is then specified in the representation of the physical space, in which the interrogation zone corresponds to the data reader. Next, at least one overlap region of the interrogation zone and the region of interest is specified. Information is then stored, including the representation, and the interest region, the interrogation zone, and/or the overlap region. Operation of the data reader is controlled as a function of the stored information. | 10-15-2009 |
Lin Zhou, Shatin CN
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20090249276 | METHODS AND SYSTEMS FOR FPGA REWIRING AND ROUTING IN EDA DESIGNS - Disclosed are a method and a system for improving FPGA routings of a circuit. The method comprises: identifying candidate alternative wires for a target wire to be replaced in the circuit according to a first preset rule; selecting a first set of alternative wires from the identified candidates according to a second preset rule; filtering the selected first set of candidates so as to reserve a second set of candidates; estimating wire replacing costs of the second set of candidates to select a third set of candidates that can improve FPGA delay performance of the circuit; and replacing the target wire with the selected third set of candidate alternative wires. | 10-01-2009 |
Lin Zhou, Chapel Hill, NC US
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20080258817 | HYBRID CONCURRENT AND SWITCHED DUAL-BAND LOW NOISE AMPLIFIER - The present invention provides a system and method for operating hybrid concurrent and switched dual-band low noise amplifiers. Embodiments use a concurrent design at the input block of a hybrid LNA to advantageously achieve better impedance matching while using a switch capacitor design at the output block to advantageously achieve a better gain than typical concurrent multiband LNAs. Embodiments might be integrated into wireless devices configured to simultaneously receive on multiple frequency bands while providing gains of 30 dB or more by combining the advantages of concurrent multiband LNAs with the advantages of switched multiband LNAs. In addition to the higher gains provided by embodiments of the hybrid LNA described herein, hybrid multiband LNAs according to embodiments of the present invention provide a smaller device footprint and power requirements than would be required for a receiver including multiple single-band LNAs for amplifying signals for each frequency band individually. | 10-23-2008 |
20080258821 | CMOS TRIPLE-BAND RF VGA AND POWER AMPLIFIER IN LINEAR TRANSMITTER - Methods and systems for amplifying signals are provided. Embodiments include a three-to-one multiplexer, a multiband RF variable gain amplifier (VGA), a multiband power amplifier driver (PAD), and a one-to three multiplexer. The three-to-one multiplexer receives three input signals from an RF frequency source and outputs an output signal corresponding one input signal. The multiband RF VGA receives the output signal of the three-to-one multiplexer, provides a first level of amplification to the signal received from the three-to-one multiplexer, and outputs an amplified version of the signal. The multiband PAD receives the signal output by the multiband RF variable gain amplifier and provides a second level of amplification to the signal and outputs an amplified version of the signal. The one-to-three multiplexer receives a signal output by the multiband PAD produces three output signals that correspond to each of the three input signals. | 10-23-2008 |
Lin Zhou, San Diego, CA US
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20110182225 | SETTING UP A MULTICAST GROUP COMMUNICATION SESSION WITHIN A WIRELESS COMMUNICATIONS SYSTEM - In an embodiment, a multicast communication session is setup at an access network within a wireless communications system, whereby the access network transmits an announce message announcing a current multicast communication session to a given group of access terminals within an initial cluster of sectors. The access network receives a registration request for the current multicast communication session from an access terminal, and selectively loads a stored cluster of sectors that supported a previous multicast communication session to the given group. The access network then turns on a multicast flow for the current multicast communication session within each sector of the stored cluster. In another embodiment, a multicast communication session is terminated whereby the access network stories a formation of the engaged cluster at or near the termination of the current multicast communication session, which can then be used during setup of a subsequent multicast communication session. | 07-28-2011 |
Lin Zhou, Ningbo CN
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20130101378 | Device Used for Capturing Micro-Particles and a Micro-Particles Transporting Equipment Provided with the Device Thereof - A device used for capturing micro-particles, which comprises a pressure regulator, a micro-jet nozzle, and a hydraulic device for providing injection liquid for the micro-jet nozzle; wherein the micro-jet nozzle is provided with an annular jet hole, the annular jet hole having a bottom end, a top end, an inner diameter, an entrance port located at the top end, and an injection port located at the bottom end, the output of the pressure regulator is connected to the entrance port of the micro-jet nozzle. Compared with the prior art, in the present invention, the liquid is taken as the medium, a kind of upward support on the micro-particles and a flow-around lift force perpendicular to the jet direction are generated by the micro-jet nozzle with the annular jet hole, which jointly act on the micro-particles, so as to achieve the micro-particle capture. | 04-25-2013 |
Lin Zhou, Shanghai CN
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20130017819 | Method for State Transition and Network Device - A method for a state transition includes determining whether a user equipment (UE) is a UE frequently performing state transitions. When the state of the UE is required to be transitioned to the idle state, a state of the UE is transitioned to a paging channel (PCH) state if the UE is a UE frequently performing state transitions. If the UE is a UE infrequently performing state transitions, the state of the UE is transitioned to the idle state. | 01-17-2013 |
20130115936 | Method for State Transition and Network Device - A method for a state transition includes determining whether a user equipment (UE) is a UE frequently performing state transitions. When the state of the UE is required to be transitioned to the idle state, a state of the UE is transitioned to a paging channel (PCH) state if the UE is a UE frequently performing state transitions. If the UE is a UE infrequently performing state transitions, the state of the UE is transitioned to the idle state. | 05-09-2013 |
Lin Zhou, Xi'An CN
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20140376665 | METHOD AND SYSTEM FOR MAPPING BIT SEQUENCES - A method of mapping a plurality of different bit sequences to a plurality of different signal points in a constellation, the number of bit sequences being greater than the number of signal points. The method includes, for a device in a telecommunication network, the acts of: determining, for each signal point in the constellation, a number of bit sequences to be mapped to each signal point, the numbers of bit sequences being distributed according to a discrete Gaussian distribution among the constellation, selecting in the plurality of bit sequences, for each signal point in the constellation, a set including the determined number of bit sequences (u) that minimize the maximal Hamming distance among the selected sets. | 12-25-2014 |
Lin Zhou US
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20150345766 | ELECTRIC CONNECTING MEMBER AND LED LAMP USING THE SAME - An electric connecting member and an LED lamp using the electric connecting member are provided. The electric connecting member is used for the electric connection between a light source substrate and a driving board of the LED lamp, and comprises an input terminal and an output terminal. The LED lamp comprises the driving board and the light source substrate. The output terminal is provided on the driving board of the LED lamp. The input terminal is disposed upon the light source substrate and is electrically connected to the light source substrate. The output terminal comprises two contacts, and one end of each of the two contacts is electrically connected to the driving board respectively. The input terminal comprises two connection heads which are respectively provided corresponding to the two contacts. One end of each of the two connection heads is electrically connected to the light source substrate respectively. | 12-03-2015 |
Lin Zhou, Xiamen CN
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20150345766 | ELECTRIC CONNECTING MEMBER AND LED LAMP USING THE SAME - An electric connecting member and an LED lamp using the electric connecting member are provided. The electric connecting member is used for the electric connection between a light source substrate and a driving board of the LED lamp, and comprises an input terminal and an output terminal. The LED lamp comprises the driving board and the light source substrate. The output terminal is provided on the driving board of the LED lamp. The input terminal is disposed upon the light source substrate and is electrically connected to the light source substrate. The output terminal comprises two contacts, and one end of each of the two contacts is electrically connected to the driving board respectively. The input terminal comprises two connection heads which are respectively provided corresponding to the two contacts. One end of each of the two connection heads is electrically connected to the light source substrate respectively. | 12-03-2015 |