Abstract: A database management system, comprising: a storage adapted for storing: a plurality of data objects organized according to a data model, and a plurality of stream operator wrappers each wrapping a stream operator and having at least one port for receiving, via a network, instructions for: scheduling activation of the wrapped stream operator, connecting the wrapped stream operator with another stream operator wrapped by another of the plurality of stream operator wrappers, and/or deploying the wrapped stream operator; a processing circuitry for executing the plurality of stream operator wrappers.

Abstract: The present disclosure provides a method and device for constructing an autism spectrum disorder (ASD) risk prediction model. The method includes: establishing a first data table and a second data table based on case information of a sample set, obtaining a first grouped table set and a second grouped table set according to a preset characteristic arrangement rule and marker grouping rule, training data based on a random forest machine learning algorithm, and importing test data to obtain a first best characteristic combination and a second characteristic combination; and obtaining a first model based on the first best characteristic combination, stratified sampling of the first data table, and the random forest machine learning algorithm, obtaining a second model based on the second best characteristic combination, stratified sampling of the second data table, and the random forest machine learning algorithm, and performing combination to construct an ASD risk prediction model.

Abstract: Various examples are provided related to crankcase ventilation for moisture removal and explosion mitigation. In one example, a combustion engine includes a crankcase with a combustion chamber; a crankcase vent for venting crankcase gas from the crankcase; and an active crankcase ventilation system for supplying supplemental air to the crankcase. The crankcase gas can include a mixture of blowby gas from the combustion chamber and the supplemental air in a ratio that reduces or eliminates condensation of water in the crankcase gas. The combustion engine can be a hydrogen engine or other type of engine.

Abstract: The objective of this application is to provide a switch device of a turnstile passage, consisting of a flap, a base, a frame, a guide rail mechanism arranged on the base and movably connected to the flap, a connecting rod swing mechanism 5 arranged on the frame 3, and a driving mechanism 6. One end of the connecting rod swing mechanism is rotationally connected to the flap so that the flap on the guide rail mechanism reciprocates between a closed position and an open position of the turnstile passage when the connecting rod swing mechanism swings; and the other end of the rod connecting rod swing mechanism is rotationally connected to the driving mechanism for driving the connecting rod swing mechanism to swing.

Abstract: A database management system, comprising: a storage adapted for storing: a plurality of data objects organized according to a data model, and a plurality of stream operator wrappers each wrapping a stream operator and having at least one port for receiving, via a network, instructions for: scheduling activation of the wrapped stream operator, connecting the wrapped stream operator with another stream operator wrapped by another of the plurality of stream operator wrappers, and/or deploying the wrapped stream operator; a processing circuitry for executing the plurality of stream operator wrappers.

Abstract: Disclosed is a halogen-free epoxy resin composition for integrated circuit packaging, and the resin composition includes a polyfunctional epoxy resin, a benzoxazine resin, a phosphorus-containing a curing agent, an inorganic filler, a curing accelerator and a solvent. The rigid and firm resins and inorganic filler contained in the composition provide a low coefficient of thermal expansion and a high heat resistance, so that laminates made of this composition are applicable for IC packaging substrates, and the laminates contain halogen-free compounds with a flame retardant rating of UL94-V0 grade.

Abstract: Disclosed is a halogen-free low-expansion resin composition including a polyfunctional epoxy resin, a phosphorus-containing epoxy resin, a benzoxazine resin, a phosphorus-containing curing agent, an inorganic filler, a curing accelerator, and a solvent. The rigid and firm resins and inorganic filler contained in the composition provide a low coefficient of thermal expansion and a high heat resistance, so that laminates made of this composition are applicable for IC packaging substrates, and the laminates contain halogen-free compounds with a flame retardant rating of UL94-V0 grade.

Abstract: Disclosed is a halogen-free high-frequency resin composition calculated according to parts by weight, and including 20-50 parts by weight of dicyclopentadiene epoxy resin, 10-40 parts by weight of styrene-maleic anhydride copolymer, 10-30 parts by weight of benzoxazine resin, 5-20 parts by weight of polyfunctional epoxy resin and 20-40 parts by weight of at least one phosphorus-containing flame retardant. A copper clad laminate made of the halogen-free high-frequency resin composition has excellent properties including a low dielectric constant, a low dielectric loss, a high heat resistance, a low water absorption, a low coefficient of expansion and a high PCB manufacturability.