Abstract: A chip-level software and hardware cooperative relay protection device is provided. The device includes: a control chip, wherein a first control unit, a second control unit, and multiple logic circuits are integrated on the control chip; and the logic circuits perform microsecond-level rapid calculation on electrical signals of a protected electrical device, obtain fault feature parameters of the protected electrical device are and transmit same to the first control unit, then perform millisecond-level real-time protection logic determination according to the fault feature parameters of the protected electrical device to obtain relay protection results of the protected electrical device, and protect the protected electrical device by controlling an external relay according to the relay protection results.

Abstract: Disclosed herein is a module for supporting a device configured to manipulate charged particle paths in a charged particle apparatus, the module comprising: a support arrangement configured to support the device, wherein the device is configured to manipulate a charged particle path within the charged particle apparatus; and a support positioning system configured to move the support arrangement within the module; wherein the module is arranged to be field replaceable in the charged particle apparatus.

Abstract: The present application provides a method for analyzing droplets on the basis of volume distribution including obtaining a total volume V of a sample containing target molecules based on a system prepared using the sample. The system is emulsified into droplets. A droplet system is obtained when the droplets obtaining the sample executes an amplification reaction. A droplet image of the droplet system is obtained. A total number n of droplets included in the droplet system is obtained based on the droplet image. A droplet volume distribution of the droplet system is obtained based on the droplet image. A number j of negative droplets among the n droplets is counted. A quantitative analysis is performed for the target molecules according to the total volume V of the sample, the total number n of droplets, the droplet volume distribution information, and the number j of negative droplets.

Abstract: A chip-level software and hardware cooperative relay protection device is provided. The device includes: a control chip, wherein a first control unit, a second control unit, and multiple logic circuits are integrated on the control chip; and the logic circuits perform microsecond-level rapid calculation on electrical signals of a protected electrical device, obtain fault feature parameters of the protected electrical device are and transmit same to the first control unit, then perform millisecond-level real-time protection logic determination according to the fault feature parameters of the protected electrical device to obtain relay protection results of the protected electrical device, and protect the protected electrical device by controlling an external relay according to the relay protection results.

Abstract: An air conditioner includes: a housing having a fan cavity and a heat exchange cavity in communication with each other; an electric control box disposed in the housing and in communication with the heat exchange cavity and the fan cavity; an electric control disposed in the electric control box; and a fan assembly disposed in the fan cavity and configured to supply air to the heat exchange cavity and dissipate heat of the electric control box. A circulating flow path is formed inside the air conditioner, to allow an airflow in the fan cavity flowing into the heat exchange cavity to at least partially flow into the electric control box and flow back to the fan cavity through the electric control box.

Abstract: A method for analyzing droplets based on images: obtaining a working dye channel image and a reference dye channel image corresponding to a droplet system (S1); separately performing a preset image processing operation on the working dye channel image and the reference dye channel image (S2); using the working dye channel image or the reference dye channel image as a target image (S3), and determining a region in which each droplet is located from within the target image (S4); and on the basis of the determined region in which each droplet is located, analyzing the droplet system (S5). The method can effective effectively improve the accuracy of droplet analysis. Further provided are a computer device and a storage medium.

Abstract: A flow cell includes a first cover; a second cover facing the first cover, and at least two spacers provided side by side between the first cover and the second cover. The first cover, the second cover, and two adjacent spacers cooperatively form a flow path, surface of the first cover near the second cover piece forms a detection surface. A first opening is provided at an end of the flow path, which can inject a first sample into the flow path. The first sample is adsorbed on the detection surface. A second opening is provided at another end of the flow path, which can inject microdroplets into the flow path. The microdroplets include a second sample. A liquid inlet and outlet device applying flow cell and a sample analysis system are further provided.

Abstract: Provided is a PCR-free library construction and sequencing method. A PCR-free high-throughput sequencing method is provided, including the following steps: obtaining a DNA fragment of target size by performing or not performing, based on a size of a nucleic acid sample, fragmentation on the nucleic acid sample; performing end repair and an A-tailing reaction; ligating an adapter containing a barcode; obtaining DNA nanoballs by performing single-strand cyclization and rolling circle replication; and loading and sequencing.

Abstract: Provided are a hooked probe, a method for ligating a nucleic acid and a method for constructing a sequencing library. The hooked probe comprises a target specific area and a hooked area ligated thereto; the target specific area comprises a sequence complementarily paired with at least part of the single chain of the nucleic acid fragment to be ligated; the hooked area comprises a sequence unpaired with the nucleic acid fragment; the end of the hooked area is a ligatable end; and the ligatable end can ligate the end of the single chain of the nucleic acid fragment.

Abstract: A random emulsification digital absolute quantitative analysis method includes: performing random emulsification processing on a system to be emulsified to obtain several isolated reaction zones or droplets; determining the total number and volume information of the various reaction zones or droplets, the presence of target molecules to be tested in the respective reaction zones or droplets, and the number of reaction zones or droplets which do not contain the target molecules by combining acquired target images comprising image regions corresponding to the amplified reaction zones or droplets, and analyzing the target images; and accurately calculating the volume information of the various reaction zones or droplets, the presence of the target molecules to be tested in the respective reaction zones or droplets, and the number of reaction zones or droplets which do not contain the target molecules, the total number of target molecules in a sample to be tested.

Abstract: The present invention discloses an aramid-based epoxy resin and a method of making same, including the steps of reacting aramid fiber powder as a raw material with a metallization reagent; grafting a plurality of ethylene oxide, propylene oxide or a mixture thereof to an activated amide group of the aramid to introduce a reactive functional group hydroxyl; and then conducting a ring-opening and closing reaction by using epichlorohydrin to obtain a liquid aramid-based epoxy resin.

Abstract: Provided are a hooked probe, a method for ligating a nucleic acid and a method for constructing a sequencing library. The hooked probe comprises a target specific area and a hooked area ligated thereto; the target specific area comprises a sequence complementarily paired with at least part of the single chain of the nucleic acid fragment to be ligated; the hooked area comprises a sequence unpaired with the nucleic acid fragment; the end of the hooked area is a ligatable end; and the ligatable end can ligate the end of the single chain of the nucleic acid fragment.

Abstract: The present invention discloses an aramid-based epoxy resin and a method of making same, including the steps of reacting aramid fiber powder as a raw material with a metallization reagent; grafting a plurality of ethylene oxide, propylene oxide or a mixture thereof to an activated amide group of the aramid to introduce a reactive functional group hydroxyl; and then conducting a ring-opening and closing reaction by using epichlorohydrin to obtain a liquid aramid-based epoxy resin.