Abstract: A thermally conductive polyamide compound is disclosed. The compound comprises a polyamide matrix, boron nitride, and a laser direct structuring additive dispersed in the matrix. The compound can be extruded, molded, calendered, thermoformed, or 3D-printed into a heat dissipating and laser direct structured article.

Abstract: A vehicle having a traction battery with at least one cell includes a controller coupled to the traction battery and programmed to control charging and discharging of the traction battery in response to detecting lithium plating in the at least one cell indicated by a ratio of differential voltage of the at least one cell as a function of time to cell charging rate of the at least one cell. In various embodiments, the ratio is compared to a threshold associated with current battery state of charge to indicate lithium plating when the ratio is below the threshold. Lithium plating can also be detected based on a measured cell open circuit voltage (OCV) relative to a previously stored OCV value. In various embodiments, the measured OCV value is calculated based on a measured cell voltage and current, and a previously stored cell internal resistance.

Abstract: A vehicle having a traction battery with at least one cell includes a controller coupled to the traction battery and programmed to modify traction battery current in response to a difference between a lithium plating parameter target value and a lithium plating parameter actual value to reduce the difference. The lithium plating parameter or indicator may be based on a differential open circuit voltage of a battery cell, or a ratio of differential voltage of the at least one cell as a function of time to cell charging rate of the at least one cell.

Abstract: A vehicle having a traction battery with at least one cell includes a controller coupled to the traction battery and programmed to control charging and discharging of the traction battery in response to detecting lithium plating in the at least one cell indicated by a ratio of differential voltage of the at least one cell as a function of time to cell charging rate of the at least one cell. The ratio may be compared to a threshold associated with current battery state of charge to indicate lithium plating when the ratio is below the threshold. Lithium plating may also be detected based on a measured cell open circuit voltage (OCV) relative to a previously stored OCV value. The measured OCV value may be calculated based on a measured cell voltage and current, and a previously stored cell internal resistance.

Abstract: A thermally conductive polyamide compound is disclosed. The compound comprises a polyamide matrix, boron nitride, and a laser direct structuring additive dispersed in the matrix. The compound can be extruded, molded, calendered, thermoformed, or 3D-printed into a heat dissipating and laser direct structured article.

Abstract: Techniques for query statistics inheritance are provided. Statistics for a database are used to determine selectivity estimates for sparse joins and tables being joined together within a given query. These statistics are inherited up to the given query along with the selectivity estimates and provided to a database optimizer to use when developing query plans and selecting an optimal query plan for the given query.

Abstract: A system may include a storage device configured to store a data store comprising data. The database system may further include a processor in communication with the storage device. The processor may receive a query that includes at least one predicate associated with the data. The processor may further determine that the at least one predicate is eligible to be converted to a range set predicate. The processor may further convert the at least one predicate to a range set predicate. The processor may further process the query with the range set predicate. A method and computer-readable medium may also be implemented.

Abstract: A thermally conductive polyamide compound is disclosed. The compound comprises a polyamide matrix with pitch-based carbon fiber, boron nitride, and organophosphinate flame regardant dispersed in the matrix. The compound can be extruded or molded into a heat dissipating article.

Abstract: A method for estimating the selectivity of a database base table predicate, the cardinality of a join, and the cardinality of an aggregation. The method includes receiving a database query, the query comprising one or more query predicates and referencing one or more database tables. One or more join indexes are identified, the join index(es) defined on respective database tables referenced by the database query. The join index(es) comprises one or more join index predicates, and includes one or more join columns in its select list. The row count selected by the query predicates is calculated at least partly using the row count or statistics of the one or more join indexes. The selectivity of the base table predicate is calculated at least partly from the calculated row count. The cardinality of the join is estimated at least partly from the row count and statistics of the identified join index(es).

Abstract: Techniques for query statistics inheritance are provided. Statistics for a database are used to determine selectivity estimates for sparse joins and tables being joined together within a given query. These statistics are inherited up to the given query along with the selectivity estimates and provided to a database optimizer to use when developing query plans and selecting an optimal query plan for the given query.

Abstract: A thermally conductive polyamide compound is disclosed. The compound comprises a polyamide matrix with pitch-based carbon fiber, boron nitride, and organophosphinate flame regardant dispersed in the matrix. The compound can be extruded or molded into a heat dissipating article.

Abstract: Techniques for independent column detection in selectivity estimations are provided. Values for database statistics are sampled and two independent tests are performed against the values for a first column and a second column. When each test determines that the first and second columns are independent, the first and second columns are said to be independent columns for selectivity estimation.

Abstract: A SQL query that includes an IN-List is optimized by utilizing an array insert to insert the IN-List into a spool and piggybacking IN-List rows into a join step.

Abstract: A multistage electromagnetic purification method of molten metal, which employs a multistage separator composed of two or more multichannel straight-pass separators bonded together with inorganic high-temperature adhesive. Each stage of the separators is set up in such a manner that the region of centerline of each channel in the former separators is occupied by the sidewall of the next separators at the corresponding position therein; while simultaneously the position in the next separators becomes a region close to sidewall. The multistage separator eliminates the “dead zone” of electromagnetic separation, realizes the transformation from “weak zone” to “strong zone” of electromagnetic separation, and significantly increases removal efficiency of inclusions in the melt with great volume under the effect of induced magnetic field.

Abstract: A method for estimating the selectivity of a database base table predicate, the cardinality of a join, and the cardinality of an aggregation. The method includes receiving a database query, the query comprising one or more query predicates and referencing one or more database tables. One or more join indexes are identified, the join index(es) defined on respective database tables referenced by the database query. The join index(es) comprises one or more join index predicates, and includes one or more join columns in its select list. The row count selected by the query predicates is calculated at least partly using the row count or statistics of the one or more join indexes. The selectivity of the base table predicate is calculated at least partly from the calculated row count. The cardinality of the join is estimated at least partly from the row count and statistics of the identified join index(es).

Abstract: A SQL query that includes an IN-List is optimized by (1) performing an evaluation to determine whether access to a table can be performed as a join operation, (2) converting the IN-List to an IN-LIST relation, and (3) joining the IN-List relation with the table to access the data in the table.

Abstract: A database query is optimized for a star database schema that includes at least one fact table and at least one dimension table, where the database query includes an IN-List condition. During optimization, the IN-List is transformed into a relation and the relation is joined with the dimension table to produce a join result. The join result is then joined to the fact table.

Abstract: Techniques for independent column detection in selectivity estimations are provided. Values for database statistics are sampled and two independent tests are performed against the values for a first column and a second column. When each test determines that the first and second columns are independent, the first and second columns are said to be independent columns for selectivity estimation.

Abstract: The present invention concerns a multistage-electromagnetic purification method of molten metal, which relates to the field of casting technique. The method of present invention employs a multistage separator instead of a single-stage one. The multistage separator is composed of two or more multichannel straight-pass separators bonded together with inorganic high-temperature adhesive. Each stage of the separators should be set up in such a manner that the region of centerline of each channel in the former separator is occupied by the sidewall of the next separator at the corresponding position therein, simultaneously the position in the next separator, which is corresponding to the central region of the channel in former separator, becomes a region close to sidewall.

Abstract: Dendron ligands or other branched ligands with cross-linkable groups were coordinated to colloidal inorganic nanoparticles, including nanocrystals, and substantially globally cross-linked through different strategies, such as ring-closing metathesis (RCM), dendrimer-bridging methods, and the like. This global cross-linking reaction sealed each nanocrystal within a dendron box to yield box-nanocrystals which showed dramatically enhanced stability against chemical, photochemical and thermal treatments in comparison to the non-cross-linked dendron-nanocrystals. Empty dendron boxes possessing a very narrow size distribution were formed by the dissolution of the inorganic nanocrystals contained therein upon acid or other etching treatments.