Abstract: A first device performs periodic scanning alternately, where a first scanning periodicity is used for a first-type Bluetooth connection, and a second scanning periodicity is used for a second-type Bluetooth connection; the first device receives a first-type data packet from a second device in a first scan window of any first scanning periodicity, where the first-type data packet is used to establish the first-type Bluetooth connection; the first device obtains, based on the first-type data packet, a second connection parameter for establishing the second-type Bluetooth connection to the second device; and the first device establishes the second-type Bluetooth connection to the second device based on the second connection parameter.

Abstract: A calculation system for predicting a proppant embedding depth based on a shale softening effect is provided, including a sampling test terminal, a scheduling module, a monitoring module, and a calculation module, wherein the scheduling module, the monitoring module, and the calculation module are connected in communication, and the monitoring module is connected to an external operating system through a wireless network, wherein the external operating system is configured to perform a hydraulic fracturing operation and receive a first control signal and/or a second control signal from the monitoring module. The sampling test terminal is configured to test the samples and obtain test data. The scheduling module is configured to determine a target construction parameter.

Abstract: The present disclosure discloses a positioning method and apparatus, a device, and a medium, and relates to the technical field of communications. The positioning method includes: determining, by a terminal, a first anchor entity.

Abstract: Provided are an electronic device and method for wireless communication, and a computer-readable storage medium. The electronic device comprises a processing circuit configured to: determine the first power limiting region of the first primary user of a main system, wherein the first power limiting region is a three-dimensional space defined by the directional beams of the first primary user to the third primary user of the main system; and determine one or more secondary users in the first power limiting regions.

Abstract: Disclosed is a rubbing device. The rubbing device comprises a rotating drive part, a mounting post and a rubbing part provided with an inner hole. The rubbing part is rotatably installed on the mounting post through the inner hole; the rotating drive part is installed on the mounting post, positioned in the inner hole, and its output end is connected with the rubbing part; and the rotating drive part is used for driving the rubbing part to rotate to rub a to-be-rubbed object when the to-be-rubbed object scratches the rubbing part. In the present application, the rotating drive part can drive the rubbing part to rotate when the to-be-rubbed object scratches the rubbing part, so as to better rub the to-be-rubbed object.

Abstract: Provided in the present disclosure are an electronic device and a method for wireless communication, and a computer-readable storage medium, the electronic device for wireless communication comprising a processing circuit, the processing circuit configured such that: if it is determined that the electronic device is in a frequency spectrum transaction verification region, verifying an effectiveness of a frequency spectrum transaction, the verification region being determined on the basis of interference generated when a frequency spectrum acquirer in the frequency spectrum transaction uses the transaction frequency spectrum; determining an electronic device signal-to-noise ratio according to interference of the electronic device when the frequency spectrum acquirer uses the transaction frequency spectrum, and if the signal-to-noise ratio is greater than a preset signal-to-noise ratio threshold configured for the electronic device, verifying that the frequency spectrum transaction is in effect.

Abstract: A structural stabilizer for a fiber and proppant complex to enhance proppant migration and placement in a fractured well during propping and a preparation method thereof are provided. The structural stabilizer consists of: water, inorganic salt, kaolinite, nitrogen-doped modified graphene oxide, anionic surfactant, non-ionic alkyl polyglucoside, and polyacrylamide. The structural stabilizer improves bonding between a proppant and a fiber when slick water is used in stimulated reservoir volume (SRV) fracturing, prevents separation of the fiber and the proppant during migration, thereby reducing escape rate of the fiber from the fiber and proppant complex.

Abstract: Provided are an electronic device and method for wireless communication, and a computer-readable storage medium. The electronic device comprises a processing circuit configured to: determine the first power limiting region of the first primary user of a main system, wherein the first power limiting region is a three-dimensional space defined by the directional beams of the first primary user to the third primary user of the main system; and determine one or more secondary users in the first power limiting regions.

Abstract: Provided in the present disclosure are an electronic device and a method for wireless communication, and a computer-readable storage medium, the electronic device for wireless communication comprising a processing circuit, the processing circuit configured such that: if it is determined that the electronic device is in a frequency spectrum transaction verification region, verifying an effectiveness of a frequency spectrum transaction, the verification region being determined on the basis of interference generated when a frequency spectrum acquirer in the frequency spectrum transaction uses the transaction frequency spectrum; determining an electronic device signal-to-noise ratio according to interference of the electronic device when the frequency spectrum acquirer uses the transaction frequency spectrum, and if the signal-to-noise ratio is greater than a preset signal-to-noise ratio threshold configured for the electronic device, verifying that the frequency spectrum transaction is in effect.

Abstract: The present disclosure relates to a calculation method for predicting a proppant embedding depth based on a shale softening effect, including determining a spontaneous imbibition depth-soaking time curve; determining a Young’s modulus-soaking time curve of core surfaces; establishing a proppant embedding model containing a softened layer by a finite element method; conducting a numerical simulation to obtain an embedding volume-soaking time curve; and obtaining a calculation formula for a proppant embedding volume considering a softening effect.

Abstract: A signal equalization method includes: receiving a clock signal and a first reference signal; detecting a phase and a frequency of the clock signal based on the first reference signal to generate a detection result; generating a speed judgement signal according to the detection result; and, receiving the speed judgement signal and deciding an equalizer operation parameter according to the speed judgement signal.

Abstract: A method for characterizing complexity of rock fracture based on fractal dimension and a device thereof are provided. The method includes steps of: collecting rock fracture samples of a rock, and collecting basic parameters of the rock; determining a fractal dimension of a rock fracture morphology of the rock; calculating the fractal dimension of the rock; calculating a complexity coefficient Fc of rock fracture of the rock; and characterizing a complexity of rock fracture of the rock based on the complexity coefficient Fc of rock fracture of the rock. In the present invention, combined with the fractal geometry theory, fracture complexity coefficient of shale rocks is redefined and calculated to accurately characterize rock fracture morphology, so that characteristics of rock fracture morphology is correctly understood and affecting factors of fracture morphology is analyzed.

Abstract: A management electronic device includes a processing circuit configured to: obtain a spectrum in an N-th round of spectrum trading and acquire the interference received by the management electronic device when an electronic device uses the traded spectrum; receive the interference received by another electronic device as determined by another electronic device related to spectrum trading; determine competition rights parameters of the management electronic device and the other electronic device, respectively, the competition rights parameters representing the credibility of the electronic devices and the magnitude of competitiveness when competing for management rights in an N+1-th round of spectrum trading; and select a new management electronic device on the basis of at least one among the interference and the competition rights parameters, the new management electronic device having management rights in the N+1-th round of spectrum trading, instead of the management electronic device having management righ

Abstract: Provided in the present disclosure are an electronic device and a method for wireless communication, and a computer-readable storage medium, the electronic device for wireless communication comprising a processing circuit, the processing circuit configured such that: if it is determined that the electronic device is in a frequency spectrum transaction verification region, verifying an effectiveness of a frequency spectrum transaction, the verification region being determined on the basis of interference generated when a frequency spectrum acquirer in the frequency spectrum transaction uses the transaction frequency spectrum; determining an electronic device signal-to-noise ratio according to interference of the electronic device when the frequency spectrum acquirer uses the transaction frequency spectrum, and if the signal-to-noise ratio is greater than a preset signal-to-noise ratio threshold configured for the electronic device, verifying that the frequency spectrum transaction is in effect.

Abstract: A single ended receiver includes a current mode logic circuit, a differential to single amplifier, and a voltage detector. The current mode logic circuit is configured to receive an input signal and a reference voltage value and is configured to output a first output signal. The differential to single amplifier is coupled to the current mode logic circuit and is configured to receive the first output signal and to output a second output signal. The voltage detector is coupled to the differential to single amplifier and is configured to output a control signal to the differential to single amplifier according to the reference voltage value. The differential to single amplifier is further configured to adjust a voltage value of the differential to single amplifier internal signal according to the control signal, so that a duty cycle of the second output signal is adjusted.

Abstract: Provided are an electronic device and method for wireless communication, and a computer-readable storage medium. The electronic device comprises a processing circuit configured to: determine the first power limiting region of the first primary user of a main system, wherein the first power limiting region is a three-dimensional space defined by the directional beams of the first primary user to the third primary user of the main system; and determine one or more secondary users in the first power limiting regions.

Abstract: A frequency spectrum management apparatus in a coexistence system according to the present disclosure includes a processing circuit configured to determine a plurality of settlement solutions of interference overlapping images according to differences between an interference overlapping image determined by the frequency spectrum management apparatus and interference overlapping images determined by other frequency spectrum management apparatuses in the coexistence system, and to determine a final settlement solution based on the total system utility of the coexistence system and according to the plurality of settlement solutions.

Abstract: The invention discloses a method for experimentally determining the conductivity of an unpropped fracture in hydraulic fracturing of a shale reservoir, comprising: select an outcrop sample with a natural fracture in the shale reservoir, and cut the outcrop sample with along the extension direction of the natural fracture into no less than eight square rock slabs; use a laser scanner to obtain the rough topography data of the fracture surface of each square rock slab and calculate the area tortuosity; pick out the rock samples; model the rough surface of the selected rock samples; import the treated surface model into the engraving machine, and select the downhole core or outcrop rocks in the same horizon for repeated production; calculate the shear slippage at different positions of unpropped fracture according to the data of the shale reservoir; finally test the conductivity of the shale rock samples after shear slip.

Abstract: A method for mirror image package preparation and application operation includes: acquiring a launch operation package and launch mirror image package; upon launching of the target application, establishing a first channel between a local buffer manager and the launch mirror image package, and a second channel between the local buffer manager and a server; creating a first virtual file system locally, and establishing a third channel between the local buffer manager and the first virtual file system; if a received file access request is a read request, acquiring first data from the launch mirror image package, and/or from an original mirror image package on the server; feeding the first data back to the target application, wherein storage directory structures of data sets in the launch mirror image package and original mirror image package individually correspond to logic directory relations of file sets in an original data package.