Abstract: Provided are N-type monocrystalline silicon double-sided solar cell and preparation method thereof.

Abstract: In one aspect, a manufacturing method for a solar cell comprises: an oxidation impurity removal and cleaning step carried out between a wet texturing step and a boron/phosphorus diffusion step. The oxidation impurity removal and cleaning step comprises: heating a silicon wafer undergoing wet texturing performed by means of basket loading, so as to form first oxide layers to adsorb impurities of the silicon wafer; and removing the first oxide layers on the front surface and the back surface of the silicon wafer.

Abstract: Provided are N-type monocrystalline silicon double-sided solar cell and preparation method thereof.

Abstract: A quality control phantom and an evaluation method for magnetic resonance arterial spin labeling perfusion imaging includes: a phantom main body; a container, a circulating liquid being provided in the container; a tube, comprising a first tube and a second tube, one end of the first tube being in communication with the container, the other end being in communication with a liquid inlet of the phantom main body, one end of the second tube being in communication with the container, the other end being in communication with a liquid outlet of the phantom main body, and the first tube, the phantom main body, the second tube and the container jointly forming a closed loop; a pump, provided on the first tube and used to drive the circulating liquid to circulate along the closed loop to generate a perfusion signal in the phantom main body.

Abstract: A bimodal three-dimensional mammary gland imaging quality detecting phantom and method, which includes: a three-dimensional breast appearance phantom structure made of agarose gel containing polyethylene, which is a radiation equivalent material of adipose tissues under X-rays, the relaxation time of hydrogen protons in the agarose gel under a 3T magnetic field is equivalent to that of human adipose tissues, and mammary gland tissue duct phantoms and phantoms of lobules of mammary gland are distributed in the breast appearance phantom structure. The phantom can be used for the image quality detection and analysis of mammary gland imaging by the systems of magnetic resonance and mammography, the material is elastic and can be compressed on a mammography platform for imaging, and the phantom can also be vertically placed in the magnetic resonance mammary gland coil for tomography, so two imaging modes of one phantom are achieved, and the application range is expanded.

Abstract: A quality control phantom and an evaluation method for magnetic resonance arterial spin labeling perfusion imaging includes: a phantom main body; a container, a circulating liquid being provided in the container; a tube, comprising a first tube and a second tube, one end of the first tube being in communication with the container, the other end being in communication with a liquid inlet of the phantom main body, one end of the second tube being in communication with the container, the other end being in communication with a liquid outlet of the phantom main body, and the first tube, the phantom main body, the second tube and the container jointly forming a closed loop; a pump, provided on the first tube and used to drive the circulating liquid to circulate along the closed loop to generate a perfusion signal in the phantom main body.

Abstract: Disclosed is a pesticide residue detection data platform based on high resolution mass spectrum, the Internet and data science, and a method for automatically generating a detection report. The platform includes allied laboratories, a detection result database of the allied laboratories, four basic sub-databases, a data collection system and an intelligent data analysis system. The intelligent analysis system reads data according to conditions set by a user, performs various statistical analyses according to a statistical analysis model, generates charts, obtains a comprehensive conclusion, and returns an analysis result to the client ends of the allied laboratories.

Abstract: The present application discloses a sizing method for making paper. An alkenyl succinic anhydride (ASA) is added to a papermaking process. An aluminum salt is added in one or more process steps during the papermaking process. Preferably, the aluminum salt is an aluminum salt which can generate free aluminum ion in aqueous solution. The sizing method of the present application enhances the usage efficiency of a sizing agent and the aluminum salt, as well as provides paper having a high moisture content.

Abstract: Disclosed is a pesticide residue detection data platform based on high resolution mass spectrum, the Internet and data science, and a method for automatically generating a detection report. The platform includes allied laboratories, a detection result database of the allied laboratories, four basic sub-databases, a data collection system and an intelligent data analysis system. The intelligent analysis system reads data according to conditions set by a user, performs various statistical analyses according to a statistical analysis model, generates charts, obtains a comprehensive conclusion, and returns an analysis result to the client ends of the allied laboratories.

Abstract: A bimodal three-dimensional mammary gland imaging quality detecting phantom and method, which includes: a three-dimensional breast appearance phantom structure made of agarose gel containing polyethylene, which is a radiation equivalent material of adipose tissues under X-rays, the relaxation time of hydrogen protons in the agarose gel under a 3T magnetic field is equivalent to that of human adipose tissues, and mammary gland tissue duct phantoms and phantoms of lobules of mammary gland are distributed in the breast appearance phantom structure. The phantom can be used for the image quality detection and analysis of mammary gland imaging by the systems of magnetic resonance and mammography, the material is elastic and can be compressed on a mammography platform for imaging, and the phantom can also be vertically placed in the magnetic resonance mammary gland coil for tomography, so two imaging modes of one phantom are achieved, and the application range is expanded.

Abstract: A magnetic resonance quality control method, server and system, wherein the method includes: receiving a quality control report set sent by a test terminal, which carries a detection identifier of a to-be-detected magnetic resonance imager and a target parameter; determining a reference parameter according to the detection identifier; obtaining a device quality report by comparing the reference parameter with the target parameter; and sending the device quality report to a corresponding test terminal according to corresponding relationship. The server provides an evaluation report of the imager to the client by analyzing the quality control reports of a large number of magnetic resonance imagers, the performance of the imager can be comprehensively and accurately evaluated, and it is beneficial for the client to understand the performance of the device more accurately and to quickly locate a fault of the imager and perform maintenance.

Abstract: The present invention is directed to an amphoteric polymer, a method for preparing an amphoteric polymer, use of the amphoteric polymer for emulsifying an alkenyl succinic anhydride. The present invention also provides an alkenyl succinic anhydride emulsion prepared using the amphoteric polymer, and a method for sizing paper using an alkenyl succinic anhydride emulsion prepared using the amphoteric polymer. The amphoteric polymer of the present invention is obtained by copolymerization of cationic monomers, non-ionic monomers, and anionic monomers.

Abstract: The present application discloses a sizing method for making paper. An alkenyl succinic anhydride (ASA) is added to a papermaking process. An aluminum salt is added in one or more process steps during the papermaking process. Preferably, the aluminum salt is an aluminum salt which can generate free aluminum ion in aqueous solution. The sizing method of the present application enhances the usage efficiency of a sizing agent and the aluminum salt, as well as provides paper having a high moisture content.

Abstract: A vacancy-modulated conductive oxide (VMCO) resistive random access memory (ReRAM) device includes at least one interfacial layer between a semiconductor portion and a titanium oxide portion of a resistive memory element. The at least one interfacial layer includes an oxygen reservoir that can store oxygen atoms during operation of the resistive memory element. The at least one interfacial layer can include an interfacial metal oxide layer, a metal layer, and optionally, a ruthenium layer.

Abstract: A vacancy-modulated conductive oxide (VMCO) resistive random access memory (ReRAM) device includes at least one interfacial layer between a semiconductor portion and a titanium oxide portion of a resistive memory element. The at least one interfacial layer includes an oxygen reservoir that can store oxygen atoms during operation of the resistive memory element. The at least one interfacial layer can include an interfacial metal oxide layer, a metal layer, and optionally, a ruthenium layer.

Abstract: A three-dimensional array of memory elements that reversibly change a level of electrical conductance in response to a voltage difference being applied across them. The memory elements can be set to a low resistance state and reset to a high resistance state during standard operation by biasing appropriate voltages on the word lines and bit lines. Prior to standard operation, the memory elements undergo a forming operation, during which current through the bit lines is limited. A forming voltage is applied to the memory elements during forming with a polarity such that a higher voltage is applied to anodes and a lower voltage to cathodes.

Abstract: Methods, processes, and compositions for improving sizing efficiency in a paper-making process are provided. Pulp slurry is treated by using alkenyl succinic anhydride that is emulsified with a polymer emulsifier. The emulsified alkeny succinic anhydride is used in conjunction with paper-making filler particles that are modified with hydroxyl-containing hydrocarbon natural polymer polysaccharide.

Abstract: A three-dimensional array of memory elements that reversibly change a level of electrical conductance in response to a voltage difference being applied across them. The memory elements can be set to a low resistance state and reset to a high resistance state during standard operation by biasing appropriate voltages on the word lines and bit lines. Prior to standard operation, the memory elements undergo a forming operation, during which current through the bit lines is limited. A forming voltage is applied to the memory elements during forming with a polarity such that a higher voltage is applied to anodes and a lower voltage to cathodes.

Abstract: A three-dimensional array of memory elements that reversibly change a level of electrical conductance in response to a voltage difference being applied across them. The memory elements can be set to a low resistance state and reset to a high resistance state during standard operation by biasing appropriate voltages on the word lines and bit lines. Prior to standard operation, the memory elements undergo a forming operation, during which current through the bit lines is limited. A forming voltage is applied to the memory elements during forming with a polarity such that a higher voltage is applied to anodes and a lower voltage to cathodes.

Abstract: In some embodiments, a memory cell is provided that includes a metal-insulator-metal stack and a steering element coupled to the metal-insulator-metal stack. The metal-insulator-metal stack includes a first conductive layer, a reversible resistivity switching layer above the first conductive layer, and a second conductive layer above the reversible resistivity switching layer. The first conductive layer and/or the second conductive layer includes a first semiconductor material layer. The steering element includes the first semiconductor material layer. Numerous other aspects are provided.