Abstract: The present disclosure provides a database-based data query method, an apparatus, an electronic device and a storage medium. The method includes: receiving a data query request; determining a plurality of search strategies that match target data as indicated by the data query request; for each search strategy, querying a data selection rate stored in association with the search strategy from a cache, wherein the data selection rate stored in the cache is determined based on real selection rates obtained from multiple historical data queries; in response to an existence of the data selection rate stored in association with the search strategy, taking the data selection rate as a target selection rate corresponding to the search strategy; and determining a target search strategy based on the target selection rate corresponding to respective search strategy, wherein the target data is obtained from a database based on the target search strategy.

Abstract: The present invention relates to a nucleoside analog having the structure of the following formula, a method for preparing the nucleoside analog, and an application of the nucleoside analog in nucleic acid sequencing, etc. wherein L1, L2, and L3 are each independently a covalent bond or a covalently linked group; B is a base or a base derivative; R1 is —OH or a phosphate group; R2 is H or a cleavable group; R3 is a detectable group or a targeting group; R5 is a polymerase reaction inhibitory group; R4 is H or —OR6, wherein R6 is H or a cleavable group; and C is a cleavable group or a cleavable bond.

Abstract: A hybrid transactional/analytical processing database includes an OLTP engine, OLAP engine, and shared storage including a mass storage device holding data of multiple tenants. The shared storage includes processing circuitry configured to implement a query executor configured to continuously monitor actual memory usage of the shared storage while the shared storage is responding to one or more queries from the OLTP engine or OLAP engine. Upon determining the actual memory usage of an operator evaluating the one or more of the queries from the OLTP engine or OLAP engine at the shared storage exceeds the preventative memory usage threshold but does not exceed the system memory usage threshold, the query executor is further configured to spill one or more fragments of query memory corresponding to the one or more queries to the mass storage device, without terminating the one or more queries.

Abstract: The present invention provides an information processing method and apparatus, a terminal, and a storage medium. The information processing method comprises: in a display interface, acquiring at least one piece of first task information in response to a first operation event on a first control or a second control; creating a first content page on the basis of content information and type information in the first task information, wherein the first content page is used for carrying association information of the first task information, the type information comprises first type information and/or second type information, and the second type information is associated with the first type information. The method in embodiments of the present invention can facilitate creation of the first content page matching the first task information by a user.

Abstract: An information processing method and apparatus, a terminal, and a storage medium. The information processing method comprises: determining first content in response to a first operation event of a first control in a first document (S11); and adding the first content to the first document on the basis of content information and type information of the first content (S12). The type information comprises first type information and/or second type information, the second type information having an association with the first type information. In the described method, first content can be added to a first document according to content information and type information of the first content, so as to distinguish different ways of adding the first content.

Abstract: The present disclosure relates to data transmission systems. One example system includes an integrated processor, a first hardware device, and a first storage. The integrated processor includes at least one processor and a queue that are connected through an internal bus, and the queue is connected to the hardware device through a network. The first hardware device sends, to the queue, a first notification message. The queue element receives the first notification message and stores the first notification message in a first hardware queue in the queue. The at least one processor accesses the to-be-transmitted data in the first storage based on the first notification message.

Abstract: The invention relates to the technical field of textile printing and dyeing, in particular to a method for preparing yarn with cloud dyeing effect; dyes with more than one color are mixed, and a small amount of dispersing agent is added, so that the pigment is not completely uniformly mixed, and the yarn obtained by extrusion molding of the pigment mixed spinning raw material has a randomly distributed multi-color cloud dyeing effect, and the cloud dyeing yarn with multi-color cloud dyeing effect is prepared, and compared with the cloth blank prepared by the traditional single-color yarn, the prepared cloth blank has a more three-dimensional pattern effect.

Abstract: The present disclosure provides a method for controlling the coolant flow of a liquid-cooled power battery, a system, and a vehicle. The method obtains a relationship between a temperature difference within a battery pack and a temperature difference within the coolant, and deduces a target temperature difference within the coolant according to a target temperature difference within the battery pack and the relationship between the temperature difference within the battery pack and the temperature difference within the coolant. The method determines a required flow capacity of the coolant according to the target temperature difference within the coolant, and controls a battery cooling pump to operate according to the required flow capacity of the coolant. The problem of higher energy consumption existing in existing liquid-cooled battery packs for controlling the temperature difference within the battery pack is resolved by the disclosure.

Abstract: The present invention relates to a nucleoside analog having the structure of the following formula, a method for preparing the nucleoside analog, and an application of the nucleoside analog in nucleic acid sequencing, etc. wherein L1, L2, and L3 are each independently a covalent bond or a covalently linked group; B is a base or a base derivative; R1 is —OH or a phosphate group; R2 is H or a cleavable group; R3 is a detectable group or a targeting group; R5 is a polymerase reaction inhibitory group; R4 is H or —OR6, wherein R6 is H or a cleavable group; and C is a cleavable group or a cleavable bond.

Abstract: Nucleoside or nucleotide analog compounds having the structure shown below, a method for preparing them, and applications in nucleic acid sequencing are disclosed. The compounds have formula (I): wherein L1, L2, and L3 are each independently a covalent bond or a covalently linked group; B is a base or a base derivative selected from purines, pyrimidines, or analogs thereof; R1 is —OH, a phosphate group, or a nucleotide; R2 as H or a cleavable group; R3 is a detectable group or a targeting group; R5 is an inhibitory group; R4 is H, —NH2, or —OR6, wherein R6 is H or a cleavable group; and C is a cleavable group or a cleavable bond.

Abstract: A catalyst containing LF-type B acid preparing ethylene using direct conversion of syngas is a composite catalyst and formed by compounding component A and component B in a mechanical mixing mode. The active ingredient of the component A is a metal oxide; the component B is a zeolite of MOR topology; and a weight ratio of the active ingredients in the component A to the component B is 0.1-20. The reaction process has an extremely high product yield and selectivity, with the selectivity for light olefin reaching 80-90%, wherein ethylene has high space time yield and can reach selectivity of 75-80%. Meanwhile, the selectivity for a methane side product is extremely low (<15%).

Abstract: The invention relates to the technical field of textile printing and dyeing, in particular to a method for preparing yarn with cloud dyeing effect; dyes with more than one color are mixed, and a small amount of dispersing agent is added, so that the pigment is not completely uniformly mixed, and the yarn obtained by extrusion molding of the pigment mixed spinning raw material has a randomly distributed multi-color cloud dyeing effect, and the cloud dyeing yarn with multi-color cloud dyeing effect is prepared, and compared with the cloth blank prepared by the traditional single-color yarn, the prepared cloth blank has a more three-dimensional pattern effect.

Abstract: The present invention discloses the preparation method of cis-p-menthane-1,8-di-secondary amine compounds and their application in weed control. The preparation method is as follows: cis-p-menthane-1,8-di-Schiff base compounds are used as the raw material, and the reducing agent is added in batches into the raw material in a polar organic solvent at ?10˜50° C. to react for 1˜24 h; after the reaction is complete, the reaction solution is quenched with distilled water and extracted with dichloromethane, and the extract phase is dried with anhydrous sodium sulfate, filtered with a filter and then distilled under reduced pressure to obtain crude cis-p-menthane-1,8-di-secondary amine compounds, which are purified into the pure product through recrystallization or silica gel column chromatography.

Abstract: A catalyst containing LF-type B acid preparing ethylene using direct conversion of syngas is a composite catalyst and formed by compounding component A and component B in a mechanical mixing mode. The active ingredient of the component A is a metal oxide; the component B is a zeolite of MOR topology; and a weight ratio of the active ingredients in the component A to the component B is 0.1-20. The reaction process has an extremely high product yield and selectivity, with the selectivity for light olefin reaching 80-90%, wherein ethylene has high space time yield and can reach selectivity of 75-80%. Meanwhile, the selectivity for a methane side product is extremely low (<15%).

Abstract: Nucleoside or nucleotide analog compounds having the structure shown below, a method for preparing them, and applications in nucleic acid sequencing are disclosed. The compounds have formula (I): wherein L1, L2, and L3 are each independently a covalent bond or a covalently linked group; B is a base or a base derivative selected from purines, pyrimidines, or analogs thereof; R1 is —OH, a phosphate group, or a nucleotide; R2 as H or a cleavable group; R3 is a detectable group or a targeting group; R5 is an inhibitory group; R4 is H, —NH2, or —OR6, wherein R6 is H or a cleavable group; and C is a cleavable group or a cleavable bond.

Abstract: This invention discloses a type of 1,8-bis(Schiff base)-p-menthane derivatives as well as their preparation method and applications. The reaction of 1,8-diamino-p-menthane with a substituted benzaldehyde was carried out in a polar organic solvent at 0° C.-75° C. for 1-48 h. After the completion of the reaction, part of the solvent was distilled off to perform recrystallization to get a 1,8-bis(Schiff base)-p-menthane derivative, whose pre-emergence herbicidal activity against ryegrass was determined by using the Petri dish seed germination method. The 1,8-bis(Schiff base)-p-menthane derivatives, obtained with this method in high yield and mild reaction conditions, have a good inhibitory effect on the growth of annual ryegrass, and low toxicity.

Abstract: A quantitative evaluation method for the reliability of a Markov model switched reluctance motor system. The method comprises: solving a probability matrix P?T(t) of a switched reluctance motor system being in any survival state at any time t via a state conversion diagram of the switched reluctance motor system; calculating the sum of various elements of the probability matrix P?T(t) of the survival state, so that a reliability function R(t) is obtained; and thus calculating the average working time of the switched reluctance motor system before failure, thereby realizing the quantitative evaluation of the switched reluctance motor system and satisfying the requirements for the reliability analysis of a switched reluctance motor drive system. This disclosure has a good engineering application value.

Abstract: A network device stores a Virtual Extensible Local Area Network (VxLAN) Tunnel Endpoint (VTEP) membership information that associates VxLANs each with a corresponding set of VTEPs authorized to originate VxLAN packets on that VxLAN. The network device receives from a communication network a VxLAN packet that identifies a VxLAN and an originating VTEP. The VTEP compares the originating VTEP to the set of VTEPs associated with the VxLAN in the VTEP membership information that matches the identified VxLAN. If the comparison indicates that the originating VTEP is not included in the set of VTEPs authorized to originate VxLAN packets, the VTEP discards the received VxLAN packet. Otherwise the VTEP further processes the VxLAN packet.

Abstract: This invention discloses a type of 1,8-bis(Schiffbase)-p-menthane derivatives as well as their preparation method and applications. The reaction of 1,8-diamino-p-menthane with a substituted benzaldehyde was carried out in a polar organic solvent at 0° C.-75° C. for 1-48 h. After the completion of the reaction, part of the solvent was distilled off to perform recrystallization to get a 1,8-bis(Schiff base)-p-menthane derivative, whose pre-emergence herbicidal activity against ryegrass was determined by using the Petri dish seed germination method. The 1,8-bis(Schiff base)-p-menthane derivatives, obtained with this method in high yield and mild reaction conditions, have a good inhibitory effect on the growth of annual ryegrass, and low toxicity.