4 results about "Micro technology" patented technology

A system receives ETL specification for processing stream data, including a transform operation represented using a database query specification. The system generates a dataflow graph of a sequence of database queries by decomposing the database query into a first database query that generates an intermediate results table, and a second database query that receives as input the intermediate results table and outputs data used for performing the transform operation. The system executes the sequence of database queries for performing the transform operation on stream data received from the source. When receiving an incremental data set, the system determines an output change set based on the received incremental data set by traversing an execution plan and processing each operator in the execution plan, and computing a change set of a particular operator from the change sets output by the one or more other operators based on the incremental data set.

The invention provides an atomic-scale observation method for electron beam irradiation induced microdefect repair in a GaN material, and belongs to the technical field of material science and electron microscopy. According to the method, through a spherical aberration correction transmission electron microscope (AC-TEM) technology, in combination with focused ion beam (FIB) sample preparation and accurate electron beam irradiation control, atomic-scale real-time observation of the dynamic repair process of the microdefects in the GaN material is achieved. The method comprises the following specific steps: selecting a GaN sample type and determining experimental parameters; preparing a sample by adopting FIB; installing the sample in an AC-TEM sample rod and adjusting the sample to a target observation crystal face; aC-TEM parameters are optimized to ensure that a clear atomic image is obtained; generating a nano hole through FIB irradiation, and observing the repairing process of the nano hole in real time; and dynamically and quantitatively analyzing the defect repair by using image analysis software. According to the method, the problem that the defect dynamic repair process cannot be captured in real time in a traditional method is solved, and an important experimental means and theoretical support are provided for researching a defect evolution mechanism and performance optimization of a GaN material.

A system receives ETL specification for processing stream data, including a transform operation represented using a database query specification. The system generates a dataflow graph of a sequence of database queries by decomposing the database query into a first database query that generates an intermediate results table, and a second database query that receives as input the intermediate results table and outputs data used for performing the transform operation. The system executes the sequence of database queries for performing the transform operation on stream data received from the source. When receiving an incremental data set, the system determines an output change set based on the received incremental data set by traversing an execution plan and processing each operator in the execution plan, and computing a change set of a particular operator from the change sets output by the one or more other operators based on the incremental data set.

This invention discloses a non-destructive testing method and system for reverse osmosis membrane element defects based on micro-CT, belonging to the field of non-destructive testing technology for water treatment membrane materials. This invention uses high-resolution micro-CT technology to perform three-dimensional structural analysis of reverse osmosis membrane elements, achieving non-destructive testing of back pressure damage and membrane fouling within spiral-wound membrane elements. During membrane element testing, CT scan images on the concentrate side showed fine cracks at the membrane bag bonding joint, indicating back pressure damage to the membrane element, leading to a significant reduction in its desalination performance. Actual measurements revealed that the thickness of the concentrate separator in the membrane element was 0.69 mm (nominal value 0.86 mm), indicating that membrane fouling caused channel blockage, thus significantly reducing permeate yield. This invention's method can deeply reveal microstructural defects within the membrane element, obtaining non-destructive three-dimensional image data, providing a non-destructive testing method for solving the problems of back pressure damage and membrane fouling in reverse osmosis membranes.