Abstract: Provided are a display panel and a display device. The display panel includes a display region and a non-display region. The display region surrounds at least part of the non-display region. The non-display region includes an element disposition region and a bank disposition region surrounding at least part of the element disposition region. The bank disposition region is provided with a bank. The display panel includes a substrate, the bank is disposed on a side of the substrate; a light-emitting layer located on a side of the bank facing away from the substrate and including a first light-emitting portion located in the bank disposition region; and a first light-shielding structure located in the bank disposition region and on a side of the first light-emitting portion facing the substrate. The first light-emitting portion and the first light-shielding structure at least partially overlap along the thickness direction of the display panel.

Abstract: Provided is a method for constructing a prediction model used for predicting a pregnancy status of a pregnant woman. The method includes: step 1 of constructing a training set and an optional test set, the training set and the optional test set each consisting of a plurality of pregnant woman samples, the pregnant woman samples each having a known pregnancy status; step 2 of determining, for each pregnant woman sample in the training set, a predetermined parameter of the pregnant woman sample, the predetermined parameter including differentially expressed gene information of the pregnant woman sample, the differentially expressed gene information being obtained through calculation based on sequencing information of fetal cell-free nucleic acids in peripheral blood of the pregnant woman sample; and step 3 of constructing the prediction model based on the known pregnancy status and the predetermined parameter.

Abstract: Provided in the present disclosure are a method for determining fetal nucleic acid concentration and a fetal genotyping method. According to the embodiments of the present disclosure, the method for determining cell-free fetal nucleic acid concentration includes: (1) acquiring sequencing data of a first nucleic acid sample of a pregnant woman and a reference genome sequence, the first nucleic acid sample of the pregnant woman containing cell-free fetal nucleic acids, and the sequencing data being composed of a plurality of sequencing reads; (2) selecting a predetermined region on the reference genome sequence and determining, based on the sequencing data of the first nucleic acid sample of the pregnant woman, mutation information in the predetermined region; and (3) determining the concentration of cell-free fetal nucleic acids corresponding to the predetermined region based on the mutation information in the predetermined region.

Abstract: A semi-open high-temperature heat pump system including a compressor, a direct-contact condenser, a heat exchanger, an evaporator, a water purifier, a cold water pump, a hot water pump, a circulating water pump, and a vacuum pump. A discharge port of the compressor is connected to the direct-contact condenser, the direct-contact condenser is connected to the evaporator via the heat exchanger, and the evaporator is connected to a gas suction port of the compressor via a gas vent on its top. An outlet of the water purifier is separately connected to the compressor, the direct-contact condenser, and the evaporator via the cold water pump. An outlet at the bottom of the evaporator is connected to the direct-contact condenser via the circulating water pump. The vacuum pump is connected above the direct-contact condenser, and the hot water pump is connected below the direct-contact condenser.

Abstract: A semi-open high-temperature heat pump system including a compressor, a direct-contact condenser, a heat exchanger, an evaporator, a water purifier, a cold water pump, a hot water pump, a circulating water pump, and a vacuum pump. A discharge port of the compressor is connected to the direct-contact condenser, the direct-contact condenser is connected to the evaporator via the heat exchanger, and the evaporator is connected to a gas suction port of the compressor via a gas vent on its top. An outlet of the water purifier is separately connected to the compressor, the direct-contact condenser, and the evaporator via the cold water pump. An outlet at the bottom of the evaporator is connected to the direct-contact condenser via the circulating water pump. The vacuum pump is connected above the direct-contact condenser, and the hot water pump is connected below the direct-contact condenser.

Abstract: Provided are an RNA library construction method and a specialized kit thereof. The method for preparing an RNA library includes the following steps: extracting RNA and performing fragmentation; adding a tail to 3? end; ligating an adaptor to 5? end and hybridizing with a DNA probe mixture; the DNA probe mixture is composed of several DNA probes that are reverse complementary to an RNA that is expected to be removed; removing RNA from the hybrid and removing DNA; performing reverse transcription and PCR amplification to obtain a library solution. The present invention combines polyA tailing and 5?end ligation. The RNA content in the system can be quickly increased by polyA tailing, thereby avoiding subsequent purification losses.

Abstract: A single-region-board type high temperature electrostatic dust collector comprising anode boards (1), a cathode board (2), emitting electrodes (3) and a high voltage power supply is provided. Two parallel corrosion resistant plates are grounded to form the anode boards (1). One corrosion resistant plate with the same shape and size as the anode boards (1) connects to the cathode of the high voltage power supply, so as to form the cathode board (2), which are suspended between the two anode boards (1) and parallel with the anode boards (1). The disk-shaped emitting electrodes (3) are uniformly embedded at two sides of the cathode board (2).

Abstract: A single-region-board type high temperature electrostatic dust collector comprising anode boards (1), a cathode board (2), emitting electrodes (3) and a high voltage power supply is provided. Two parallel corrosion resistant plates are grounded to form the anode boards (1). One corrosion resistant plate with the same shape and size as the anode boards (1) connects to the cathode of the high voltage power supply, so as to form the cathode board (2), which are suspended between the two anode boards (1) and parallel with the anode boards (1). The disk-shaped emitting electrodes (3) are uniformly embedded at two sides of the cathode board (2).