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公开(公告)号：US11073160B2
公开(公告)日：2021-07-27
申请号：US15691858
申请日：2017-08-31
发明人： Muthuvel Murugan , Anindya Ghoshal , Luis Bravo
IPC分类号： F04D29/32 , F04D27/02 , F01D7/00 , F04D29/56 , F04D29/36 , G06F17/13 , G06F17/12 , G06F30/23
摘要： Conventional gas turbine engines are generally optimized to operate at nearly a fixed speed with fixed blade geometries for the design operating condition. When the operating condition of the engine changes, the flow incidence angles may not be optimum with the blade geometries resulting in reduced off-design performance. By contrast, according to embodiments of the present invention, articulating the pitch angle of turbine blades in coordination with adjustable nozzle vanes improves performance by maintaining flow incidence angles within the optimum range at all operating conditions of a gas turbine engine. Maintaining flow incidence angles within the optimum range can prevent the likelihood of flow separation in the blade passage and also reduce the thermal stresses developed due to aerothermal loads for variable speed gas turbine applications.
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公开(公告)号：US11049985B2
公开(公告)日：2021-06-29
申请号：US15856632
申请日：2017-12-28
发明人： Kwong-Kit Choi
IPC分类号： H01L31/0232 , H01L31/0352 , H01L51/44 , H01L31/103 , H01L51/42 , H01L31/101 , H01L31/0296 , H01L31/032 , H01L27/144 , H01L31/0216 , H01L31/0304 , G06F30/20 , G06F30/23 , G06F30/39 , H01L31/0256 , H01L51/00
摘要： A photo detection device comprising a contact layer through which light enters; an absorbing region positioned such that light admitted through the contact layer passes into the absorbing region; at least one diffractive element operatively associated with the absorbing region operating to diffract light into the absorbing region; the configuration of the at least one diffractive element being determined by computer simulation to determine an optimal diffractive element (or elements) and absorbing region configuration for optimal quantum efficiency for at least one predetermined wavelength detection range, the at least one diffractive element operating to diffract light entering through the contact layer such that phases of diffracted waves from locations within the photo detection device or waves reflected by sidewalls and waves reflected by the at least one diffractive element form a constructive interference pattern inside the absorbing region. A method of designing a photodetector comprises using a computer simulation to determine an optimal configuration for at least one wavelength range occurring when waves reflected by the diffractive element form a constructive interference pattern inside the absorbing region.
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公开(公告)号：US10663389B2
公开(公告)日：2020-05-26
申请号：US15939333
申请日：2018-03-29
发明人： Casey P. O'Brien , Ivan C. Lee , Zachary W. Dunbar
摘要： A permeation cell device includes a body component, a wire mesh support structure positioned in the body component, a membrane over the wire mesh support structure, a pair of compressible gaskets sandwiching the membrane, and a flange compressing the membrane. A spectroscopic device contains the permeation cell device. At least one mechanism simultaneously performs an infrared-reflection absorption spectroscopic analysis of a surface of the membrane as a fluid permeates on the membrane and measures a trans-membrane fluid permeation rate across the membrane. The wire mesh support structure may be configured to provide mechanical support to the non-opaque membrane at a pressure of at least 1 atm. The permeation cell device and the spectroscopic device may collectively create a pair of separate isolated compartments. The body component may include a material that is non-permeable to the fluid.
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公开(公告)号：US20190186691A1
公开(公告)日：2019-06-20
申请号：US15846460
申请日：2017-12-19
IPC分类号： F16N39/04 , F16N15/00 , F16N25/00 , F16N9/00 , C10M107/46 , C10M107/48 , C10M177/00 , C08J3/00
CPC分类号： F16N39/04 , C08J3/00 , C08J2300/22 , C08J2300/24 , C10M107/46 , C10M107/48 , C10M177/00 , C10M2221/00 , C10M2225/00 , C10N2050/08 , C10N2240/02 , F16N9/00 , F16N15/00 , F16N25/00 , F16N2200/12 , F16N2210/12 , F16N2210/14 , F16N2270/50
摘要： A lubricating system includes a machine configured to operate in a first operating state and a second operating state; and a heat activated polymer material applied to at least a part of the machine and to remain solid during the first operating state and to soften upon being heated in the second operating state to lubricate the machine. The heat activated polymer material may soften due to increased friction incurred by the machine in the second operating state. A heating element may be operatively connected to any of the machine and the heat activated polymer material. The heat activated polymer material may soften due to being heated by the heating element in the second operating state. An injector may apply the heat activated polymer material to the machine. A channel may direct a flow of the heat activated polymer material as it softens in the second operating state.
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公开(公告)号：US20190186332A1
公开(公告)日：2019-06-20
申请号：US15846251
申请日：2017-12-19
发明人： Micheal V. Scanlon
CPC分类号： F01N13/1888 , F01N1/02 , F01N13/1838 , F01N13/1877 , F01N2470/02
摘要： A noise abatement system including at least one fluid circulation chamber to receive at least one flow of fluid; at least one vorticity-inducing component adjacent to the at least one fluid circulation chamber, the at least one vorticity-inducing component to redirect the at least one flow of fluid tangentially to an inside perimeter wall of the at least one fluid circulation chamber to create fluctuations in a flow and pressure of the fluid causing increased and variable vorticity within the at least one fluid circulation chamber; and at least one vorticity-interaction region in communication with the at least one vorticity-inducing component to attenuate acoustics caused by the at least one flow of fluid.
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公开(公告)号：US10291633B1
公开(公告)日：2019-05-14
申请号：US15330591
申请日：2016-10-18
发明人： Richard E Harang , Lisa M Marvel , Travis W Parker
摘要： A malware detection system comprising a signature generator for combining malware signatures into a malware signature filter with a fixed false positive rate; a central location configured to send the malware signature filter to each of a plurality of hosts that are configured to scan files on the host system using the malware signature filter; each host configured such that if the scan indicates a positive result, the file is quarantined and the host sends identification back to central location if a false positive result is obtained for additional instruction. A method for malware detection operative to combine malware signatures into a filter with fixed false positive rate; comprising sending a malware signature filter to hosts for scanning of files on the host system and incoming data; if the malware signature filter returns a positive alert, identification is sent back to a central location.
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公开(公告)号：US10234543B2
公开(公告)日：2019-03-19
申请号：US15133276
申请日：2016-04-20
摘要： Embodiments of the present invention concern locating targets using non-linear radar with a matched filter which uses exponential value of the transmit signal. According to embodiments, a method of non-linear radar target location includes: transmitting a signal of a transmit waveform towards a target; receiving a signal from the target; creating a matched filter by generating an exponential function of the transmit waveform corresponding to a particular harmonic of the interest; and applying the matched filter to the received signal to generate and output a signature waveform for the target of the particular harmonic of interest. In other embodiments, the matched filtering may be combined with sidelobe reduction.
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公开(公告)号：US10228449B2
公开(公告)日：2019-03-12
申请号：US15175886
申请日：2016-06-07
发明人： Lam H. Nguyen , Trac D. Tran
IPC分类号： G01S7/02 , H04L27/00 , G01S13/02 , G01S13/90 , H04B17/345 , H04B1/7163 , G01S13/00
摘要： A system for reception of electromagnetic waves in a spectrum in which interference with radio frequencies of other electronics devices occurs comprising a transmitter; at least one receiver configured to receive the received signal; each received signal organized into a digital vector; at least one memory portion configured to store a plurality of received signals in a vector form; the vectors being combined into a matrix, each vector of the matrix being a digital data record representing a received signal; at least one processor operatively connected to the at least one memory portion; the at least one processor configured to estimate that portion of the received signal attributable to noise; the at least one processor operating to jointly estimate a minimal number of distinctive noise patterns and minimize the simplicity of the data of interest; the at least processor operating to process the noise and data of interest separately.
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公开(公告)号：US10203405B2
公开(公告)日：2019-02-12
申请号：US15093788
申请日：2016-04-08
摘要： Method for determining distance to target using a multitone nonlinear radar system comprising providing a transmitter that transmits a signal comprising at least two predetermined frequency components; receiving transmitted signal upon reflection from target; determining the phase relationships of the frequency components when signal strikes target; determining distance the signal has travelled to target based upon the phase relationship of the frequency signal components at the time of reflection from target; computing the distance to target. A system comprising a transmitter subsystem that transmits radar signal comprising at least two frequency components; a receiver subsystem configured to receive a return signal comprising intermodulation and harmonic products; at least one processor configured to extract frequency samples from the return signal within a frequency range, apply a window function to the extracted frequency samples and perform an inverse fast Fourier transform on the resulting function to create a range profile.
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10.发明申请公开(公告)号：US20190036473A1
公开(公告)日：2019-01-31
申请号：US15710947
申请日：2017-09-21
IPC分类号： H02S10/30 , H01L31/054 , H01L31/056 , G02B5/28 , G02B1/115
摘要： Embodiments of the invention generally relates to photovoltaic, thermophotovoltaic, and laser power beaming devices which convert solar light, thermal radiation, or laser radiation into electric power. Said devices have a reflective interference “greenhouse” filter placed in front of a semiconductor cell and a reflective mirror on the back of the cell. The front filter is transparent for high energy (short wavelength) photons, but traps low energy (long wavelength) photons emitted by photocarriers accumulated near the semiconductor bandgap. In the optimized PV device, the chemical potential of photoelectrons near semiconductor bandgap exceeds the chemical potential of photoelectrons above the photonic bandgap established by the filter (i.e., the device is in chemical nonequilibrium). The greenhouse filter reduces the emission losses, decreases the semiconductor cell thickness, and provides PV conversion with reduced nonradiative losses. Said device converts radiative energy into electricity in a more efficient way than conventional cells.
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