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公开(公告)号：US20210278556A1
公开(公告)日：2021-09-09
申请号：US16811323
申请日：2020-03-06
发明人： Bruce Gordon Elmegreen , Oki Gunawan , Wang Zhou
IPC分类号： G01V1/18
摘要： Aspects of the invention include arranging two cylindrical magnets with transverse magnetization to be parallel to each other along their longitudinal axis. The two cylindrical magnets have a space between them and are prevented from moving relative to one another. An exemplary method includes disposing a diamagnetic object in the space between the two cylindrical magnets, wherein the object levitates above the space. A motion detector is arranged to identify relative movement between the two cylindrical magnets and the object, and an infrasound wave is identified based on the relative movement.
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公开(公告)号：US11080363B2
公开(公告)日：2021-08-03
申请号：US15843234
申请日：2017-12-15
发明人： Lior Horesh , Giacomo Nannicini , Raya Horesh , Wang Zhou
IPC分类号： G06F30/20 , G06F17/13 , G06N20/00 , G06F111/10
摘要： Free-form discovery of differential equations for modeling a physical system or process under investigation that includes defining a formal language sentence grammar that describes admissible relationships between quantities, and incorporating the use of such grammar for free-(functional) form, automatic discovery of differential equations. The method requires minimum knowledge of the desired differential equation and is universally applicable to ordinary and partial differential equations. From received training set data representing inputs to the physical system and measured outputs, a numerical error bound data, primitive operators, differential equation operators, variables, coefficients and grammatical rules that define the syntax of valid expressions, the system finds a model characterized by sources of error to find a simplest (minimum complexity) mathematical expression comprising differential operators such that a discrepancy between the observed data and the value of the mathematical expression is bounded, and the mathematical expression is consistent with valid syntax constraints.
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公开(公告)号：US20200326306A1
公开(公告)日：2020-10-15
申请号：US16382937
申请日：2019-04-12
发明人： Oki Gunawan , Wang Zhou
IPC分类号： G01N27/72
摘要： Systems and methods are provided that facilitate high-sensitivity, carrier-resolved photo-Hall effect measurements. Majority and minority carrier properties can be measured and determined simultaneously. In one aspect, a system and method determine majority carrier type, density and mobility and, with modulated illumination, minority carrier mobility and photocarrier density. In another aspect, a system and method can determine hole and electron mobility, photocarrier density, absorbed photon density, recombination lifetime and diffusion length for hole, electron and ambipolar transport.
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公开(公告)号：US20200286655A1
公开(公告)日：2020-09-10
申请号：US16293212
申请日：2019-03-05
发明人： Oki Gunawan , Wang Zhou
摘要： Techniques regarding operating one or more parallel dipole line traps are provided. For example, one or more embodiments described herein can comprise a system, which can comprise a parallel dipole line trap comprising a diamagnetic object positioned between a plurality of dipole line magnets. The system can also comprise a split photodetector sensor positioned adjacent to the parallel dipole line trap. The split photodetector sensor can detect a displacement of the diamagnetic object.
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公开(公告)号：US20200151553A1
公开(公告)日：2020-05-14
申请号：US16184554
申请日：2018-11-08
发明人： Wang Zhou , Huan Hu , Wei Tan , Qianwen Chen
摘要： Using a set of airflow sensors disposed on an airfoil of an aircraft, first airflow data including an amount of airflow experienced at each airflow sensor at a first time is measured. Using a trained neural network model, the first airflow data is analyzed to determine an airflow state of the aircraft. In response to determining that the aircraft is in the abnormal airflow state, a control surface and a power unit of the aircraft are adjusted. Responsive to the adjusting, the aircraft is returned to the normal airflow state.
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公开(公告)号：US20180299581A1
公开(公告)日：2018-10-18
申请号：US15490084
申请日：2017-04-18
发明人： Oki Gunawan , Hendrik F. Hamann , Wang Zhou
摘要： A highly sensitive gravimeter using a magnetic parallel dipole line (PDL) trap system is provided. In one aspect, a gravimeter includes: a vacuum enclosure; a PDL trap within the vacuum enclosure, the PDL trap having a pair of dipole line magnets, and a diamagnetic rod levitating in between the dipole line magnets; and a heater and temperature sensor within the vacuum enclosure configured to maintain a constant temperature within the vacuum enclosure that is greater than a temperature outside of the vacuum enclosure and precision frequency measurement system. The frequency of the oscillation of the trapped diamagnetic rod will yield the local gravitational acceleration. Methods for measuring a local gravitational field using the present gravimeter are also provided.
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