96 results about "Sample composition" patented technology

The invention provides a method and apparatus for trapping, releasing and / or separating sample components in solution passing through a channel with or without packing material present by passing ion current through the channel driven by an electric field. A portion of the ion current comprises cation and / or anion species generated from second solution flows separated from the sample solution flow path by semipermeable membranes. Cation and / or Anion ion species generated in the second solution flow regions are transferred into the sample solution flow path through ion selective semipermeable membranes. Ion current moving along the sample solution flow path is controlled by varying the composition of the second solutions and / or changing the voltage between membrane sections for a given sample solution composition. The sample composition may also be varied separately or in parallel to enhance trapping, release and / or separation efficiency and range. The invention when interfaced to an Atmospheric Pressure Ion Source, that may include Electrospray Ionization, with mass spectrometric analysis enables independent control of the on-line sample separation process and the Atmospheric Pressure Ion Source or Electrospray ionization processes.

The embodiment of the invention discloses a clustering result evaluation method and device based on large-scale samples. The embodiment of the invention provides a technical scheme. The method comprises: obtaining clustering results, randomly extracting a first set number of classes from all the classes of the clustering result, taking the clustering result as a first sampling class, extracting asecond set number of samples from each class of the first sampling class according to a set sampling rule to serve as sampling samples, forming a second sampling class based on the sampling samples, finally calculating a contour coefficient according to the second sampling class, and obtaining corresponding clustering result evaluation. By adopting the technical means, the data volume of the clustering result can be reduced through reasonable sample sampling, the complexity of clustering result evaluation calculation is reduced on the premise of ensuring that the sampled sample has the representativeness of the clustering result, and the generation efficiency of clustering result evaluation is further improved.

Systems and methods for monitoring a sample or a sample flow associated with a process or an environment. The systems and methods transmit terahertz signals at the sample, receive a resulting spectral response, perform a spectral analysis, and display a result or choose a course of action. The analysis compares the sample's absorption or reflection spectral response to known spectrums to determine composition; or to determine if the sample flow has deviated from “normal”. In one embodiment, the systems and methods use reflection terahertz on a contained sample; in another it uses transmission terahertz to look at a sample flow outside the vehicle. In this embodiment the analysis is used to determine sample composition. In other embodiments, the analysis is used to discern or warn of changes, or to choose a course of action.