Abstract: A composite solution for enhancing induced disease resistance of lentinan (LNT) to a plant, a preparation method of the composite solution, and a method for enhancing induced disease resistance of LNT to a plant are provided. The composite solution for enhancing induced disease resistance of LNT to a plant includes: an LNT-containing solution and an SPc-containing solution, where SPc is a dendritic macromolecule functionalized by an amino functional group, and has a structural formula shown in formula I, where n=1 to 100. An LNT/SPc complex is produced in the composite solution. SPc spontaneously combines with LNT through hydrogen bonding, such that an agglomerate structure formed by LNT in an aqueous solution is broken and reduced to a nano-scale particle size, and a spherical particle is produced, which can significantly reduce a contact angle of the LNT aqueous solution, and promote the distribution and diffusion of LNT.

Abstract: This disclosure provides a method, a computing system, and a computer program product for managing prefetching of pages in a database system. The method comprises obtaining shared information associated with page access, wherein the shared information associated with the page access includes information associated with the page access from a plurality of computing nodes. The method further comprises determining whether to prefetch a number of pages into a global buffer pool based at least on the shared information associated with the page access using a sequential prefetching method.

Abstract: Provided is a pressure-resistant underwater acoustic coating structure with a mesh structure interlayer, including an outer coating, a mesh structure interlayer, an inner coating, and a metal backing; wherein the outer coating is used for inputting acoustic waves, the mesh structure interlayer and the inner coating are used for consuming acoustic wave energy, and the metal backing is used for enriching a sound absorption mode; and the outer coating, the mesh structure interlayer, the inner coating and the metal backing are attached in sequence.

Abstract: The present application discloses a double-sided SiP packaging structure and a manufacturing method thereof, wherein the double-sided SiP packaging structure comprises a substrate, a first packaging structure arranged on the substrate, and a second packaging structure arranged below the substrate; the second packaging structure comprises a chip, interposer and a molding material; a conductive structure array is arranged on an upper surface of the interposer; the interposer is arranged below the substrate through the conductive structure array; a space region among a lower surface of the substrate, the chip and the interposer is filled with the molding material; a conductive bonding pad array is arranged on the lower surface of the interposer; and a groove is formed in a part of region between the conductive bonding pad and an edge contour of the interposer.

Abstract: A computer implemented method processes a query. A number of processor units processes the query to identify a result set in response to receiving the query from a first client. The number of processor units stores, the result set in a shared cache assigned to a group of clients, wherein result set stored in the shared cache is accessible by the group of clients. The number of processor units returns the result set to a second client in the group of clients from the shared cache in response to receiving the query from the second client in the group of clients.

Abstract: Computer technology for retrieving data stored in a table that includes the following computer operations: receiving, from persistent storage of a computer, an original Index Tree data structure; storing, in volatile memory, a memory-based Index Tree data structure based on the original Index Tree data structure, with the memory-based Index Tree data structure including: a root node, a set of hierarchically arranged intermediate layer(s) with each intermediate layer including a plurality of non-leaf nodes, and a leaf layer including a plurality of leaf nodes; and retrieving data from a table in a database, with the retrieval including traversing the memory-based Index Tree data structure through a plurality of child lock pointers to locate pages including the data to be retrieved from the table.

Abstract: This disclosure provides a computer-implemented method, a computer system and a computer program product for database compression oriented to combinations of fields of a database record. One or more combinations of fields of a record of a database are determined that satisfy a frequency criterion indicating that access frequencies of the one or more combinations of fields are higher than an access frequency threshold. The record is reorganized based on the one or more combinations of fields to store fields of each combination of the one or more combinations of fields in a respective contiguous storage space. The reorganized record is compressed by applying a compression scheme to the one or more combinations of fields.

Abstract: A computer-implemented method that includes receiving an ingestion request to ingest data to a database comprising physical shards and detecting that the ingestion request is directed to a first hotspot shard. The first hotspot shard has a contention level over a threshold value. The method also detects context characteristics within the data and generates a first virtual shard based on a first virtual shard key selected from the detected context characteristics. The first virtual shard virtually duplicates at least a portion of the first hotspot shard. The method also includes ingesting the data to the first virtual shard.

Abstract: A cross-coupling control method for moving beam of gantry machine tool is disclosed, which relates to the technical field of CNC machine tool control. The cross-coupling control method includes: Step 1: establishing a crossbeam dynamics model considering a ram on the crossbeam, and at the same time simplifying the model for an observer design; step 2: realizing a PID control parameter adjustment of motors at both ends in accordance with a method of parameter tuning of a unilateral servo control system; using a servo system with the same control parameters to jointly drive the crossbeam up and down, realizing the synchronous control and realizing PID control parameter tuning for both end motors. The disclosure not only reduces the synchronization error caused by the torsion of the crossbeam, but also solves the synchronization error caused by the asymmetric load on both sides, and improves the system robustness and stability.

Abstract: Disclosed are techniques for relational database locks based on columns. Database transactions may be targeted to specific columns of one or more records, instead of the entire row for those records, using primary keys. Column locks on specific keys are stored separately than column locks on ranges of keys, which are both checked when requesting a new column lock for either a single key or a range of keys. When a threshold number of columns for a given record, or range of records/keys, have been locked, the column locks for that record, or range of records, can be combined into a single row level lock to reduce resource costs for maintaining multiple concurrent locks.

Abstract: A method of identifying a point of compromise includes accessing data stored in a data storage system, the data being associated with a plurality of identified at-risk accounts, identifying a plurality of common points of transaction, each of the plurality of common points of transaction being associated with a minimum number of the plurality of identified at-risk accounts, and identifying a point of compromise from the plurality of common points of transaction based on (i) the number of the identified at-risk accounts involved in transactions executed via each common point of transaction during a time period, and (ii) a total number of accounts involved in transactions executed via the common point of transaction during the time period.

Abstract: A power control system includes a control unit, a motor, an electricity storing unit, and a generator set. The control unit includes a charging/driving controller and a load controller electrically connected to a load. The motor can be driven by electricity of the electricity storing unit. The generator set includes a revolving wheel which is driven by the motor for driving a driving power generator and an energy storage generator. The driving power generator provides electricity to the load. Electrical energy generated by the energy storage generator is used for charging the electricity storing unit. When the generator set breaks down, the electricity of the electricity storing unit is provided to the load through a control of the charging/driving controller. The power control system supplies sufficient electrical energy to the load under low energy consumption condition and has advantages of environment protection and fault alarm.

Abstract: A power control system includes a control unit, a motor, an electricity storing unit, and a generator set. The control unit includes a charging/driving controller and a load controller electrically connected to a load. The motor can be driven by electricity of the electricity storing unit. The generator set includes a revolving wheel which is driven by the motor for driving a driving power generator and an energy storage generator. The driving power generator provides electricity to the load. Electrical energy generated by the energy storage generator is used for charging the electricity storing unit. When the generator set breaks down, the electricity of the electricity storing unit is provided to the load through a control of the charging/driving controller. The power control system supplies sufficient electrical energy to the load under low energy consumption condition and has advantages of environment protection and fault alarm.

Abstract: A method of identifying a point of compromise includes accessing data stored in a data storage system, the data being associated with a plurality of identified at-risk accounts, identifying a plurality of common points of transaction, each of the plurality of common points of transaction being associated with a minimum number of the plurality of identified at-risk accounts, and identifying a point of compromise from the plurality of common points of transaction based on (i) the number of the identified at-risk accounts involved in transactions executed via each common point of transaction during a time period, and (ii) a total number of accounts involved in transactions executed via the common point of transaction during the time period.

Abstract: A method of identifying a point of compromise includes accessing data stored in a data storage system, the data being associated with a plurality of identified at-risk accounts, identifying a plurality of common points of transaction, each of the plurality of common points of transaction being associated with a minimum number of the plurality of identified at-risk accounts, and identifying a point of compromise from the plurality of common points of transaction based on (i) the number of the identified at-risk accounts involved in transactions executed via each common point of transaction during a time period, and (ii) a total number of accounts involved in transactions executed via the common point of transaction during the time period.