Abstract: The disclosure provides a method for querying data across a plurality of distributed databases. The method includes receiving a query at a local coordinator of a local database cluster. The method further includes sending the query to a remote coordinator of a remote database cluster. The method further includes retrieving, by each local segment of a plurality of local segments of the local database cluster, data responsive to the query from corresponding one or more remote segments of the remote database cluster associated with the local segment. The method further includes sending a response to the query based on the data responsive to the query from each of the corresponding one or more remote segments.

Abstract: A generation method and device for a blood flow spectrum envelope includes: importing an image, then finding a connected domain; obtaining a contour map through the connected domain; marking coordinates of contour pixel points on the contour map; and connecting all the coordinates to form a blood flow spectrum envelope. A program stored in the storage medium or a processor of an ultrasound device has the steps of the generation method for the blood flow spectrum envelope. The blood flow spectrum envelope is automatically found; and when the image is continuously collected by ultrasound, the envelope is generated in real time according to the image collected by ultrasound in the disclosure to analyze a blood flow.

Abstract: This application provides a battery cover color change method applicable to an electronic device and the electronic device. The electronic device includes an application and a battery cover. The method includes: sending audio data to an audio playing process by the application; in an audio playing process, obtaining color change data based on the first audio data, where the color change data corresponds to rhythms of the first audio data; and playing the first audio data while the battery cover changes colors in accordance with the rhythms of the first audio data driven by the color change data.

Abstract: A first aspect of the present invention provides a method for the preparation of 2-chloro-5-chloromethylpyridine, comprising: performing a cyclization reaction on 4,5-dichloro-4-methoxypentanenitrile in presence of a silicon compound and an acylamide compound to obtain 2-chloro-5-chloromethylpyridine. Another aspect of the present invention provides a method for preparation of 2-(chloromethyl)-5-(trifluoromethyl)-1,3,4-oxadiazole, comprising: performing a cyclization reaction on 1-(chloroacetyl)-2-(trifluoroacetyl)hydrazine in a presence of a silicon compound and an acylamide compound to obtain 2-(chloromethyl)-5-(trifluoromethyl)-1,3,4-oxadiazole. The silicon compound or/and acylamide compound provided by the present invention serve as cyclization reagents and have high efficiency.

Abstract: A downlink data transmission method and apparatus, a storage medium, and an electronic device are disclosed. The method may include: determining a transmission delay, where the transmission delay includes a sum of an optical fiber transmission delay and a downlink processing delay from a Media Access Control (MAC) exit to an air interface (S102); determining a frame starting time of the MAC exit according to the transmission delay (S104); and transmitting downlink data according to the frame starting time (S106).

Abstract: An interface in a color Doppler ultrasound spectrum mode is generated on a display screen. In the interface, at a sampling preparation stage, a plurality of sampling instruction receiving regions are generated on a first position where a part of pixels of sampling tools are located and other positions. Instructions given in the regions are configured to control the sampling tools to change sampling ranges and sampling directions and pulse repetition frequencies. At a blood flow spectrum display stage, the sampling instruction receiving regions are closed; and a blood flow spectrum image control instruction region is generated to change a position of a blood flow spectrum baseline, and change an ultrasound signal gain and a spectrum speed. A computer program is stored to implement the operation method for the above color Doppler ultrasound spectrum mode interface.

Abstract: A computer-implemented method, medium, and system for global deadlock detection in a hybrid database for transactional and analytical workloads are disclosed. In one computer-implemented method, a daemon is launched on a coordinator segment in a massively parallel processing (MPP) database, where the MPP database is a hybrid database for both transactional workloads and analytical workloads. A respective local wait-for graph for each of a plurality of segments in the MPP database is collected periodically, where each of the plurality of segments includes the coordinator segment or a worker segment of a plurality of worker segments in the MPP database. A global wait-for graph that includes all collected local wait-for graphs is built. The global wait-for graph is used to determine that a global deadlock exists in the MPP database. The global deadlock is broken using one or more predefined policies in response to determining that the global deadlock exists.

Abstract: Provided are a decoding method, a decoding device and a decoder. The method includes: setting a decoder parallelism P, and splitting soft information of a block to be decoded according to the parallelism P; performing decoding calculation on the block to be decoded according to the split information, and outputting decoded hard bit information; and recombining the hard bit information according to the parallelism P.

Abstract: Systems and method for low-power gaze prediction on touch-enabled electronic devices using touch interactions are provided. The method includes receiving an input touch interaction applied to a touch interaction area on a touchscreen display of a touch-enabled device and obtaining, by a gaze prediction module, a predicted gazing area on the touchscreen display based on the input touch interaction. A touch-enabled device has a processor, a touchscreen display and memory storing instructions to carry out the method. The gaze prediction module may utilize a model based on Bayesian inference or convolutional neural networks. Advantageously, gaze prediction is achieved without the use of image-capturing devices and with low power consumption. This can be used to develop intelligent hands-free interactions and personalized recommendation systems.

Abstract: Systems and method for low-power gaze prediction on touch-enabled electronic devices using touch interactions are provided. The method includes receiving an input touch interaction applied to a touch interaction area on a touchscreen display of a touch-enabled device and obtaining, by a gaze prediction module, a predicted gazing area on the touchscreen display based on the input touch interaction. A touch-enabled device has a processor, a touchscreen display and memory storing instructions to carry out the method. The gaze prediction module may utilize a model based on Bayesian inference or convolutional neural networks. Advantageously, gaze prediction is achieved without the use of image-capturing devices and with low power consumption. This can be used to develop intelligent hands-free interactions and personalized recommendation systems.

Abstract: Provided are a decoding method, a decoding device and a decoder. The method includes: setting a decoder parallelism P, and splitting soft information of a block to be decoded according to the parallelism P; performing decoding calculation on the block to be decoded according to the split information, and outputting decoded hard bit information; and recombining the hard bit information according to the parallelism P.

Abstract: The present disclosure provides a device and a method for an anchor bolt (cable) supporting structure test and an anchoring system performance comprehensive experiment, and relates to the technical field of anchoring tests.

Abstract: The present disclosure provides a device and a method for an anchor bolt (cable) supporting structure test and an anchoring system performance comprehensive experiment, and relates to the technical field of anchoring tests.

Abstract: A device for measuring liquid volume in a container, wherein the measuring device includes a compression member, which is in sealed connection with a container to be detected, forms a sealed space in the container, and compresses gases in the sealed space under the effect of an external force, and the compressed volume value of the gases is a predetermined value; a pressure detector, which is disposed on the compression member, and configured to measure the pressure values of the gases in the container before and after compression; and a controller. A container and a method for measuring liquid volume in a container is further provided.

Abstract: A detachable and combined drive key of a power head of a rotary drilling rig is provided. The drive key includes torque transfer keys and a pressure transfer key. Each torque transfer key is respectively assembled on a key groove on an inner wall of the drive sleeve. The pressure transfer key is assembled at a bottom of a drive sleeve and includes a circular ring structure and a plurality of pressure pads. Each pressure pad has a width less than the torque transfer key. A central surface of each pressure pad is aligned with a central surface of each torque transfer key. The drive sleeve, the torque transfer keys, and the pressure transfer key are combined to form an integrated drive key with a same circular cross-section.

Abstract: The present disclosure discloses a device for measuring the volume of liquid in a container by temperature calibration and a container. The device comprises: a compression member, limiting devices, the limiting devices being able to be hermetically connected to a container to form a sealed space in the container and being able to compress gas in the sealed space, and the limiting devices ensuring a fixed and known movement distance of the compression member; a gas pressure sensor for detecting gas pressure values; and a temperature detection device. The measurement device can acquire the volume of liquid in the container to be detected, the temperature value, the sectional size and the displacement value. The present disclosure can eliminate the influence of temperature on the result of measurement and thus increase the accuracy of measurement of the volume of liquid in a container.

Abstract: The present disclosure discloses a device, a container and a method for measuring a liquid volume in a container based on air pressure sensing. The measuring device includes a moving member, a unidirectional member, an air pressure detection device and a controller. The moving member is connected with a con tamer to be detected to form a gas storage space. By using the unidirectional member, the gas storage space is communicated with the external environment when the volume decreases, and remains sealed with the external environment when the volume increases. The air pressure detection device is disposed on the moving member to measure a pressure value in the gas storage space. The device accurately measures the liquid volume in the container, effectively eliminates the interference of liquid motion on the measurement result, and can be conveniently used to detect a water volume in the natural usage.

Abstract: The utility model relates to a cover, and discloses a cup cover with quick locking function, and a cup, wherein the cup cover includes a cover body and a rotating member arranged on the cover body, the rotating member is provided with a clamping hook, and the rotating member can rotate relative to the cover body, so as to drive the clamping hook to reciprocate between a first position and a second position. A rotatable clamping buckle locking structure is used in the utility model to replace a screw thread locking structure in the related art, which can reduce the time for operating the cup cover, implements quick opening and closing of the cup cover, enables the drinking action of a user more smooth and nature, and helps to improve the user experience.

Abstract: The present disclosure discloses a device, a container and a method for measuring a liquid volume in a container based on air pressure sensing. The measuring device includes a moving member, a unidirectional member, an air pressure detection device and a controller. The moving member is connected with a con tamer to be detected to form a gas storage space. By using the unidirectional member, the gas storage space is communicated with the external environment when the volume decreases, and remains sealed with the external environment when the volume increases. The air pressure detection device is disposed on the moving member to measure a pressure value in the gas storage space. The device accurately measures the liquid volume in the container, effectively eliminates the interference of liquid motion on the measurement result, and can be conveniently used to detect a water volume in the natural usage.

Abstract: The utility model relates to a cover, and discloses a cup cover with quick locking function, and a cup, wherein the cup cover includes a cover body and a rotating member arranged on the cover body, the rotating member is provided with a clamping hook, and the rotating member can rotate relative to the cover body, so as to drive the clamping hook to reciprocate between a first position and a second position. A rotatable clamping buckle locking structure is used in the utility model to replace a screw thread locking structure in the related art, which can reduce the time for operating the cup cover, implements quick opening and closing of the cup cover, enables the drinking action of a user more smooth and nature, and helps to improve the user experience.