Abstract: A method for improving sound quality of a speaker includes: performing frequency division on an input signal of the speaker to obtain a first low-frequency input signal and a first high-frequency input signal, where the input signal is a time domain signal; performing transient detection on the first low-frequency input signal to determine whether the first low-frequency input signal is a transient signal; if the first low-frequency input signal is a transient signal, performing signal envelope modulation on the first low-frequency input signal to obtain a second low-frequency input signal; determining an output signal of the speaker based on the second low-frequency input signal and the first high-frequency input signal, where a startup voltage of the second low-frequency input signal is higher than a startup voltage of the first low-frequency input signal, and loudness of the second low-frequency input signal is greater than loudness of the first low-frequency input signal.

Abstract: Methods, apparatus, and systems that enable retransmissions and/or transmission of uplink feedback information using different carriers are disclosed. In one example aspect, a method for wireless communication includes receiving, by a terminal device, a signaling message from a base station. The signaling message includes a field indicting one or more resources for a set of frequency blocks from N sets of frequency blocks configured for a transmission from the terminal device to the base station. Each set of frequency blocks corresponds to a carrier or a bandwidth part, and N is a positive integer greater than 1. The method also includes performing the transmission using the one or more resources indicated in the signaling message.

Abstract: Disclosed is a detection device for a working surface. The detection device (100) comprises: a plurality of hydraulic supports (101), a laser ranging set (102), a displacement sensor (103), a hydroelectric signal conversion module (104), and a support controller (105) which are disposed on a working surface. The laser ranging set (102) is disposed below a top beam of a first target hydraulic support among the plurality of hydraulic supports and parallel to a post of the first target hydraulic support, and is configured to determine error length and send the error length to the hydroelectric signal conversion module (104). The displacement sensor (103) is configured to at least obtain the degrees of inclination of the hydraulic supports (101) and send the degrees of inclination to the hydroelectric signal conversion module (104).

Abstract: A method includes: performing interpolation on a second nonlinear parameter of a speaker based on direct current resistance of the speaker to obtain a third nonlinear parameter of the speaker, where the second nonlinear parameter is a nonlinear parameter preconfigured in the speaker; performing signal compensation on a first input signal of the speaker based on the third nonlinear parameter to obtain a compensated first input signal; and performing filtering on the compensated first input signal to obtain an output signal of the speaker.

Abstract: Systems and methods for wireless communication systems are disclosed. In one aspect, the wireless communication method includes sending, by a network to a wireless communication device, first signaling for monitoring at least one downlink control channel, the at least one downlink control channel comprises a first downlink control channel and a second downlink control channel. The second downlink control channel comprises a retransmission of the first downlink control channel. The method includes sending, by the network to a plurality of wireless communication devices comprising the wireless communication device, the at least one downlink control channel.

Abstract: Techniques are described to determine a time clock value by a communication device using information provided by a network device. An example wireless communication method includes receiving, by a communication device, a first signal in a first time period; transmitting, by the communication device, a second signal in a second time period later than the first time period to a network device; receiving, by the communication device, a third message comprising a timing information associated with the first time period, the second time period, or a propagation delay value; and determining, by the communication device, a time when the communication device receives the first signal based at least on the timing information.

Abstract: Methods, apparatus, and systems that facilitate the indication of the codebook to be transmitted/retransmitted are disclosed. In one example aspect, a method for wireless communication includes transmitting, by a base station, a physical-layer control signaling message to a user device triggering a retransmission of a codebook for a feedback transmission that has been previously canceled. The physical-layer control signaling message includes a field of resource assignment that is used to indicate an attribute associated with the codebook. The method also includes receiving, by the base station, the retransmission of the codebook from the user device according to the physical-layer control signaling message.

Abstract: The present disclosure describes methods, system, and devices for collision resolution in configuring time-frequency resource in a half-duplex and/or full-duplex telecommunication system. The method includes receiving, by a user equipment (UE), a first message which is used to resolve a collision between a first transmission in a first frequency resource region and a second transmission in a second frequency resource region, wherein the first and second transmissions overlap in a time domain; and determining, by the UE based on the first message, to transmit one of the first transmission and the second transmission, wherein transmission directions of the first transmission and the second transmission are different.

Abstract: Example implementations include receiving, by a wireless communication device from a network, first signaling identifying a frequency resource set, receiving, by the wireless communication device from the network, second signaling identifying two or more frequency resources from the frequency resource set to be activated simultaneously. The two or more frequency resources comprises a first frequency resource and a second frequency resource. In response to receiving the second signaling, the wireless communication device communicates with the network using the two or more frequency resources simultaneously.

Abstract: Techniques are described to supporting transmission on any serving cell, carrier, or bandwidth part (BWP). An example wireless communication method includes receiving, by a first device from a second device, a first control information that schedules a first transmission on a first cell with the first device, where the first control information indicates a first hybrid automatic repeat request (HARQ) entity associated with the first transmission; and performing an operation to process the first control information.

Abstract: Methods and systems for techniques for determining control message formats in wireless networks are disclosed. In an implementation, a method of wireless communication includes determining, by a wireless device, a size budget of a control information in a case that the control information includes multi-cell scheduling control information, and monitoring a plurality of control channels carrying the control information within the size budget.

Abstract: Techniques are described for performing feedback by a communication device. An example wireless communication method includes receiving, by a communication device, X shared channels from a network device, where the X shared channels are located in between a first random access channel (RACH) instance and a second RACH instance in time domain, where the second RACH instance includes Y RACH occasions in time domain, where X and Y are integers, and where Y is greater than or equal to X; and transmitting, by the communication device, a preamble in at least one RACH occasion from the Y RACH occasions, where the preamble indicates exactly one of: (1) a feedback associated with a shared channel from the X shared channels, or (2) a random access.

Abstract: The present disclosure is directed to UL cell and SCell activation, including sending, by a base station to a wireless communication device, a Secondary Cell (SCell) activation command triggering at least SCell activation and measurement signal for at least one SCell, and receiving, by the base station from the wireless communication device, the measurement signal in response to the SCell activation command, wherein the wireless communication device activates the at least one SCell in response to the SCell activation command.

Abstract: The present invention provides a knife head assembly of a novel medical electrotome and a novel medical electrotome. The knife head assembly comprises a snare ring and a cutting knife, the cutting knife comprises a knife handle fixedly connected to a distal end of the snare ring and a knife head fixedly connected to a distal end of the knife handle; the surface of the knife handle is provided with two grooves that are arranged symmetrically and extend in a length direction of the knife handle, the knife handle is further provided with a through-hole penetrating through the knife handle, the two ends of the through-hole are in communication with the two grooves respectively, the distal end of the snare ring is inserted through the through-hole, and the parts of the snare ring on the two sides of the through-hole are limited in the grooves, thus the distal end of the snare ring is embedded and fixed in the knife handle.

Abstract: The present disclosure relates to olefin polymerization catalysts, and discloses a catalyst component for olefin polymerization or copolymerization and a preparation method therefor, and a catalyst and an application thereof. The catalyst component for olefin polymerization or copolymerization in the present disclosure comprises titanium element, magnesium element, an electron donor, an organic silicon polymer, and an inorganic oxide support, wherein the molecular composition of the organic silicon polymer is [RxSiO(4-x)/2]m, wherein R is selected from alkyl, aryl, vinyl or oxygen, x is 0 or more and 2 or less, and the value of m makes the number-average molecular weight of the organic silicon polymer be 1×103-1×106 g/mol.

Abstract: The present invention discloses a Ziegler-Natta catalyst system for olefin polymerization, comprising at least one compound represented by formula (I) as (i) an internal electron donor, (ii) an external electron donor, or (iii) the both, wherein M1, M2, M3, M4, M5, M6, M1?, M2?, M3?, M4?, M5? and M6? are each independently selected from the group consisting of hydrogen, hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, —R1 and —OR2, wherein R1 and R2 are each independently a C1-C10 hydrocarbyl, which is unsubstituted or substituted by a substituent selected from the group consisting of hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, C1-C10 alkoxy and heteroatoms; and wherein, when among M1-M6 and M1?-M6?, any two adjacent groups on the same phenyl ring are each independently selected from the group consisting of R1 and —OR2, the two adjacent groups may optionally be linked to form a ring, with a proviso that M1, M2, M3, M4, M5, M6, M1?, M2?, M3?, M4?, M5? and M6? are not simultaneous

Abstract: The present invention discloses a Ziegler-Natta catalyst system for olefin polymerization, comprising at least one compound represented by formula (I) as (i) an internal electron donor, (ii) an external electron donor, or (iii) the both, wherein M1, M2, M3, M4, M5, M6, M1?, M2?, M3?, M4?, M5? and M6? are each independently selected from the group consisting of hydrogen, hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, —R1 and —OR2, wherein R1 and R2 are each independently a C1-C10 hydrocarbyl, which is unsubstituted or substituted by a substituent selected from the group consisting of hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, C1-C10 alkoxy and heteroatoms; and wherein, when among M1-M6 and M1?-M6?, any two adjacent groups on the same phenyl ring are each independently selected from the group consisting of R1 and —OR2, the two adjacent groups may optionally be linked to form a ring, with a proviso that M1, M2, M3, M4, M5, M6, M1?, M2?, M3?, M4?, M5? and M6? are not simultaneous

Abstract: The invention relates to a catalyst component for olefin (co)polymerization, to preparation thereof, to a catalyst comprising the same, and to use thereof in olefin (co)polymerization. The catalyst component of the invention comprises magnesium, titanium, halogen, inner electron donor compound, and alkoxy group derived from a surface modifier, wherein the content of the alkoxy group derived from the surface modifier is in a range of from 0.01 to 3 percent by weight, based on the weight of the catalyst component.

Abstract: The invention relates to a catalyst component for olefin (co)polymerization, to preparation thereof, to a catalyst comprising the same, and to use thereof in olefin (co)polymerization. The catalyst component of the invention comprises magnesium, titanium, halogen, inner electron donor compound, and alkoxy group derived from a surface modifier, wherein the content of the alkoxy group derived from the surface modifier is in a range of from 0.01 to 3 percent by weight, based on the weight of the catalyst component.

Abstract: The present invention provides a catalyst component used for homopolymerization or co-polymerization of ethylene, comprising at least one suitable electron donor compound supported on a composition containing magnesium and titanium, wherein the electron donor compound is selected from the group consisting of aliphatic ethers, alicyclic ethers, aromatic ethers, aliphatic ketones and alicyclic ketones, and wherein the composition containing magnesium and titanium is prepared by dissolving a magnesium compound into a solvent system to form a homogeneous solution and then contacting the solution with a titanium compound in the presence of a precipitation aid to precipitate the composition. The present invention also relates to a method for the preparation of said catalyst component and a catalyst comprising thereof, and to use of the catalyst in homopolymerization of ethylene or co-polymerization of ethylene with at least one C3–C8 ?-olefin.