Patents by Inventor Shengli Zhou
Shengli Zhou has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20250019859Abstract: The present disclosure provides a flow guide cylinder lifting assembly, including a flow guide cylinder lifting component disposed on a water-cooling lateral arm and a lifting bolt, wherein the lifting bolt is disposed in the flow guide cylinder lifting component, a lower end of the lifting bolt extends downward through an opening of an upper heat-insulating cover of the flow guide cylinder, a lifting nut is disposed at an upper end of the lifting bolt, and the lifting nut is matched to the lifting bolt to raise or lower the flow guide cylinder.Type: ApplicationFiled: July 31, 2023Publication date: January 16, 2025Applicant: TCL ZHONGHUAN RENEWABLE ENERGY TECHNOLOGY CO., LTD.Inventors: Mingyang GONG, Wenxia ZHANG, Qian GUO, Shengli WANG, Xuebing KANG, Yanjie ZHOU, Peng HAN, Jinliang QIAO, Lin WANG, Haoping SHEN
-
Publication number: 20250019860Abstract: A suspended lifting device for diversion cylinder is provided, wherein the suspended lifting device includes a lifting beam connected to a surface of a water-cooling cross arm. A groove is provided on the lifting beam, and the groove is configured to receive a lifting bolt. A positioning plate is disposed on a bottom side of the lifting beam close to the water-cooling cross arm, and the positioning plate is configured to control an angle between the lifting beam and the water-cooling cross arm.Type: ApplicationFiled: July 31, 2023Publication date: January 16, 2025Applicant: TCL ZHONGHUAN RENEWABLE ENERGY TECHNOLOGY CO., LTD.Inventors: Mingyang GONG, Wenxia ZHANG, Qian GUO, Shengli WANG, Xuebing KANG, Yanjie ZHOU, Peng HAN, Jinliang QIAO, Lin WANG, Haoping SHEN
-
Publication number: 20240394092Abstract: Provided in the present disclosure are a memory and apparatus for managing a memory snapshot, a device, and a medium. The method includes: when a memory snapshot generation command is acquired, a virtual machine is suspended; a two-level page table of the virtual machine is copied to obtain a first snapshot page table, and a read-only identifier is set for each of page table entries of the two-level page table; and memory pages corresponding to page table entries of the first snapshot page table are acquired by means of the page table entries of the first snapshot page table, a reference count of each of the memory pages is increased, and the virtual machine is restored from a suspended state to a running state.Type: ApplicationFiled: November 30, 2022Publication date: November 28, 2024Applicant: SUZHOU METABRAIN INTELLIGENT TECHNOLOGY CO., LTD.Inventors: Liang WANG, Shengli ZHOU, Zhen FENG
-
Patent number: 8504891Abstract: Advantageous underwater acoustic (UWA) apparatus, systems and methods are provided according to the present disclosure. The apparatus, systems and methods employ nonbinary low density parity check (LDPC) codes that achieve excellent performance and match well with the underlying modulation. The nonbinary LDPC codes of the proposed apparatus, systems and methods are formed, at least in part, from a generator matrix that has a high density to reduce the peak-to-average-power ratio (PAPR) with minimal overhead. The disclosed apparatus, systems and methods employ nonbinary regular LDPC cycle codes if the constellation is large and nonbinary irregular LDPC codes if the constellation is small or moderate. The nonbinary irregular and regular LDPC codes enable: i) parallel processing in linear-time encoding; ii) parallel processing in sequential belief propagation decoding; and iii) considerable resource reduction on the code storage for encoding and decoding.Type: GrantFiled: March 25, 2010Date of Patent: August 6, 2013Assignee: University of ConnecticutInventors: Shengli Zhou, Peter Willett, Jie Huang
-
Patent number: 8467269Abstract: Advantageous online and/or real-time OFDM-based underwater acoustic (UWA) apparatus, systems and methods are provided according to the present disclosure. The apparatus, systems and methods employ a receiver with a bank of parallel branches, with each branch having a self-correlator matched to a different waveform scaling factor. A detection is declared when any of the branches leads to a correlation metric larger than a pre-defined threshold. The branch with the largest metric yields a Doppler scale estimate and a coarse synchronization point. The proposed apparatus, systems and methods use one OFDM preamble, thereby avoiding the need to buffer the whole data packet before data demodulation and enabling online and/or real-time operation. Thus, the disclosed apparatus, systems and methods are advantageously applicable to UWA communications.Type: GrantFiled: April 1, 2010Date of Patent: June 18, 2013Assignee: University of ConnecticutInventors: Shengli Zhou, Peter Willett, Christian Berger, Sean Mason
-
Publication number: 20110029845Abstract: Advantageous underwater acoustic (UWA) apparatus, systems and methods are provided according to the present disclosure. The apparatus, systems and methods employ nonbinary low density parity check (LDPC) codes that achieve excellent performance and match well with the underlying modulation. The nonbinary LDPC codes of the proposed apparatus, systems and methods are formed, at least in part, from a generator matrix that has a high density to reduce the peak-to-average-power ratio (PAPR) with minimal overhead. The disclosed apparatus, systems and methods employ nonbinary regular LDPC cycle codes if the constellation is large and nonbinary irregular LDPC codes if the constellation is small or moderate. The nonbinary irregular and regular LDPC codes enable: i) parallel processing in linear-time encoding; ii) parallel processing in sequential belief propagation decoding; and iii) considerable resource reduction on the code storage for encoding and decoding.Type: ApplicationFiled: March 25, 2010Publication date: February 3, 2011Applicant: UNIVERSITY OF CONNECTICUTInventors: Shengli Zhou, Peter Willett, Jie Huang
-
Publication number: 20110013487Abstract: Advantageous online and/or real-time OFDM-based underwater acoustic (UWA) apparatus, systems and methods are provided according to the present disclosure. The apparatus, systems and methods employ a receiver with a bank of parallel branches, with each branch having a self-correlator matched to a different waveform scaling factor. A detection is declared when any of the branches leads to a correlation metric larger than a pre-defined threshold. The branch with the largest metric yields a Doppler scale estimate and a coarse synchronization point. The proposed apparatus, systems and methods use one OFDM preamble, thereby avoiding the need to buffer the whole data packet before data demodulation and enabling online and/or real-time operation. Thus, the disclosed apparatus, systems and methods are advantageously applicable to UWA communications.Type: ApplicationFiled: April 1, 2010Publication date: January 20, 2011Applicant: University of ConnecticutInventors: Shengli Zhou, Peter Willett, Christian Berger, Sean Mason
-
Patent number: 7859944Abstract: Advantageous OFDM-based underwater acoustic (UWA) apparatus, systems and methods are provided according to the present disclosure. In general, OFDM transmissions over UWA channels encounter frequency-dependent Doppler drifts that destroy the orthogonality among OFDM subcarriers. The disclosed apparatus, systems, and methods use a two-step approach to mitigate frequency-dependent Doppler drifts for zero-padded OFDM transmissions over fast-varying channels: (1) non-uniform Doppler compensation via resampling to convert a “wideband” problem into a “narrowband” problem; and (2) high-resolution uniform compensation on the residual Doppler. The disclosed apparatus, systems and methods are based on block-by-block processing and do not rely on channel dependence across OFDM blocks. Thus, the disclosed apparatus, systems and methods are advantageously applicable for fast-varying UWA channels.Type: GrantFiled: June 18, 2008Date of Patent: December 28, 2010Assignees: Massachusetts Institute of Technology, University of Connecticut, Woods Hole Oceanographic InstitutionInventors: Shengli Zhou, Baosheng Li, Peter Willett, Milica Stojanovic, Lee Freitag
-
Patent number: 7782573Abstract: Trellis-based methods for reducing feedback while maintaining performance in a Multiple Input, Multiple Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) system. The methods involve: receiving a plurality of symbols from a plurality of sub-carriers at a receiver; selecting a plurality of indices of codewords corresponding to a codebook of pre-coding weighting matrices for the sub-carriers based on vector quantization compression of the codewords, including selecting a plurality of indices based on trellis-based feedback encoding; and transmitting the selected indices over a wireless channel to a transmitter. Optimal precoding matrices are selected at the same time for all subcarriers by searching for the optimum choice of matrices along a trellis. Selecting a plurality of indices based on trellis-based feedback encoding includes constructing a trellis by specifying a state transition table.Type: GrantFiled: November 15, 2006Date of Patent: August 24, 2010Assignee: University of ConnecticutInventors: Shengli Zhou, Baosheng Li, Peter Willett
-
Patent number: 7672384Abstract: Techniques are described for multicarrier multiple access wireless transmission, e.g. orthogonal frequency-division multiple access (OFDMA) transmissions, over frequency selective fading channels. The techniques are designed to maintain constant modulus transmissions for uplink while effectively mitigating intersymbol interference. Specifically, the techniques utilize non-redundant unitary precoding across OFDMA subcarriers to maintain constant modulus transmissions for uplink communications. For example, the techniques involve precoding a block of information symbols and assigning a different subcarrier for each symbol of the block. The subcarriers are selected to be equi-spaced and may be selected, for example, from a phase-shift keying constellation. The number of symbols per block is equal to the number of subcarriers assigned per user. Importantly, even with multiple subcarriers per user, the techniques enable constant modulus transmissions for uplink.Type: GrantFiled: March 2, 2005Date of Patent: March 2, 2010Assignee: Regents of the University of MinnesotaInventors: Georgios B. Giannakis, Shengli Zhou, Pengfei Xia
-
Patent number: 7609782Abstract: Techniques are described for space-time block coding for single-carrier block transmissions over frequency selective multipath fading channels. Techniques are described that achieve a maximum diversity of order NtNr (L+1) in rich scattering environments, where Nt (Nr) is the number of transmit (receive) antennas, and L is the order of the finite impulse response (FIR) channels. The techniques may include parsing a stream of information-bearing symbols to form blocks of K symbols, precoding the symbols to form blocks having J symbols, and collecting consecutive Ns blocks. The techniques may further include applying a permutation matrix to the Ns blocks, generating a space-time block coded matrix having Nt rows that are communicated through a wireless communication medium. The receiver complexity is comparable to single antenna transmissions, and the exact Viterbi's algorithm can be applied for maximum-likelihood (ML) optimal decoding.Type: GrantFiled: March 6, 2007Date of Patent: October 27, 2009Assignee: Regents of the University of MinnesotaInventors: Georgios B. Giannakis, Shengli Zhou
-
Publication number: 20090129204Abstract: Advantageous OFDM-based underwater acoustic (UWA) apparatus, systems and methods are provided according to the present disclosure. In general, OFDM transmissions over UWA channels encounter frequency-dependent Doppler drifts that destroy the orthogonality among OFDM subcarriers. The disclosed apparatus, systems, and methods use a two-step approach to mitigate frequency-dependent Doppler drifts for zero-padded OFDM transmissions over fast-varying channels: (1) non-uniform Doppler compensation via resampling to convert a “wideband” problem into a “narrowband” problem; and (2) high-resolution uniform compensation on the residual Doppler. The disclosed apparatus, systems and methods are based on block-by-block processing and do not rely on channel dependence across OFDM blocks. Thus, the disclosed apparatus, systems and methods are advantageously applicable for fast-varying UWA channels.Type: ApplicationFiled: June 18, 2008Publication date: May 21, 2009Applicant: University of ConnecticutInventors: Shengli Zhou, Baosheng Li, Peter Willett, Milica Stojanovic, Lee Freitag
-
Patent number: 7522673Abstract: The invention is directed to techniques for space-time coding in a wireless communication system in which the transmitter makes use of multiple transmit antennas. The transmitter uses channel information estimated by a receiving device and returned to the transmitter, e.g., as feedback. In one exemplary embodiment, the transmitter receives a mean feedback information that defines a mean channel value associated with the different channels of the different antennas. In another exemplary embodiment, the transmitter receives covariance feedback, e.g., statistical values associated with each of the different channels.Type: GrantFiled: April 21, 2003Date of Patent: April 21, 2009Assignee: Regents of the University of MinnesotaInventors: Georgios B. Giannakis, Shengli Zhou
-
Patent number: 7403509Abstract: Techniques are described for performing block equalization on a received wireless communication signal formed according to interleaved chips generated from sub-blocks of symbols. For example, a one-step block equalization process is described which produces estimates of the information-bearing symbols from a wireless communication signal received from two or more transmitters in a soft handoff environment. The techniques provide improved performance in high load, soft handoff environments with low complexity, highly flexible equalization. The wireless communication signal may be a CIBS-CDMA signal in which a symbol block is divided into sub-blocks and spread by a user-specific block-spreading matrix. The CIBS signal is received through M subchannels and a de-spreading matrix is applied to produce a multi-user interference (MUI) free sub-block output for the mth channel.Type: GrantFiled: May 7, 2004Date of Patent: July 22, 2008Assignee: Regents of the University of MinnesotaInventors: Georgios B. Giannakis, Shengli Zhou
-
Publication number: 20080037685Abstract: Techniques are described for space-time block coding for single-carrier block transmissions over frequency selective multipath fading channels. Techniques are described that achieve a maximum diversity of order NtNr (L+1) in rich scattering environments, where Nt (Nr) is the number of transmit (receive) antennas, and L is the order of the finite impulse response (FIR) channels. The techniques may include parsing a stream of information-bearing symbols to form blocks of K symbols, precoding the symbols to form blocks having J symbols, and collecting consecutive Ns blocks. The techniques may further include applying a permutation matrix to the Ns blocks, generating a space-time block coded matrix having Nt rows that are communicated through a wireless communication medium. The receiver complexity is comparable to single antenna transmissions, and the exact Viterbi's algorithm can be applied for maximum-likelihood (ML) optimal decoding.Type: ApplicationFiled: March 6, 2007Publication date: February 14, 2008Applicant: Regents of the University of MinnesotaInventors: Georgios Giannakis, Shengli Zhou
-
Publication number: 20070297529Abstract: Techniques are provided for reducing feedback while maintaining performance in a MIMO-OFDM system. The disclosed techniques employ finite-rate feedback methods that uses vector quantization compression. The disclosed methods/techniques generally involve: receiving a plurality of symbols from a plurality of sub-carriers at a receiver; selecting a plurality of indices of codewords corresponding to a codebook of pre-coding weighting matrices for the sub-carriers based on vector quantization compression of the codewords; and transmitting the selected indices over a wireless channel to a transmitter. Finite state vector quantization feedback makes use of a finite state vector quantizer (FSVQ), which is a recursive vector quantizer (VQ) with a finite number of states. In finite state vector quantization feedback, optimal precoding matrices (beamforming vectors) are selected sequentially across subcarriers.Type: ApplicationFiled: November 15, 2006Publication date: December 27, 2007Inventors: Shengli Zhou, Baosheng Li, Peter Willett
-
Patent number: 7251768Abstract: In general, joint error-control coding and linear precoding techniques are proposed for fading-resilient transmissions over frequency- at and frequency-selective fading channels encountered with high-rate wireless OFDM transmissions. For example, a wireless communication system includes a transmitter that applies non-linear codes and a linear precoder to a data stream to produce a joint coded-precoded waveform. A receiver receives the joint coded-precoded waveform from the transmitter via a wireless communication channel, and demodulates the joint-coded precoded waveform to produce estimated data. The combination offers a multiplicative benefit to the diversity achievable by the wireless communication system.Type: GrantFiled: April 21, 2003Date of Patent: July 31, 2007Assignee: Regents of the University of MinnesotaInventors: Georgios B. Giannakis, Zhengdao Wang, Shengli Zhou
-
Patent number: 7190734Abstract: Techniques are described for space-time block coding for single-carrier block transmissions over frequency selective multipath fading channels. Techniques are described that achieve a maximum diversity of order NtNr(L+1) in rich scattering environments, where Nt(Nr) is the number of transmit (receive) antennas, and L is the order of the finite impulse response (FIR) channels. The techniques may include parsing a stream of information-bearing symbols to form blocks of K symbols, precoding the symbols to form blocks having J symbols, and collecting consecutive NS blocks. The techniques may further include applying a permutation matrix to the NS blocks, generating a space-time block coded matrix having Nt rows that are communicated through a wireless communication medium. The receiver complexity is comparable to single antenna transmissions, and the exact Viterbi's algorithm can be applied for maximum-likelihood (ML) optimal decoding.Type: GrantFiled: May 28, 2002Date of Patent: March 13, 2007Assignee: Regents of the University of MinnesotaInventors: Georgios B. Giannakis, Shengli Zhou
-
Patent number: 7139321Abstract: Techniques are described for efficiently estimating and compensating for the effects of a communication channel in a multi-carrier wireless communication system. The techniques exploit the fact that the transmitted symbols are drawn from a finite-alphabet to efficiently estimate the propagation channel for multi-carrier communication systems, such systems using OFDM modulation. A transmitter transmits data through a communication channel according to the modulation format. A receiver includes a demodulator to demodulate the data and an estimator to estimate the channel based on the demodulated data. The channel estimator applies a power-law operation to the demodulated data to identify the channel. The techniques can be used in both blind and semi-blind modes of channel estimation.Type: GrantFiled: March 7, 2002Date of Patent: November 21, 2006Assignee: Regents of the University of MinnesotaInventors: Georgios B. Giannakis, Shengli Zhou
-
Publication number: 20050220200Abstract: Techniques are described for multicarrier multiple access wireless transmission, e.g. orthogonal frequency-division multiple access (OFDMA) transmissions, over frequency selective fading channels. The techniques are designed to maintain constant modulus transmissions for uplink while effectively mitigating intersymbol interference. Specifically, the techniques utilize non-redundant unitary precoding across OFDMA subcarriers to maintain constant modulus transmissions for uplink communications. For example, the techniques involve precoding a block of information symbols and assigning a different subcarrier for each symbol of the block. The subcarriers are selected to be equi-spaced and may be selected, for example, from a phase-shift keying constellation. The number of symbols per block is equal to the number of subcarriers assigned per user. Importantly, even with multiple subcarriers per user, the techniques enable constant modulus transmissions for uplink.Type: ApplicationFiled: March 2, 2005Publication date: October 6, 2005Inventors: Georgios Giannakis, Shengli Zhou, Pengfei Xia