Abstract: A computer-implemented method includes: receiving an inquiry request message identifying a first payment transaction having a plurality of transaction parameters and a risk score, where the risk score is generated by a machine-learning model based on the plurality of transaction parameters; for each transaction parameter of the plurality of transaction parameters, perturbing a value of the transaction parameter and re-analyzing the first payment transaction with the machine-learning model to generate a perturbed risk score based on the perturbed transaction parameter; determining at least one impact parameter from the plurality of transaction parameters by comparing the perturbed risk scores generated for each of the plurality of transaction parameters; and generating an inquiry response message based on the at least one impact parameter.

Abstract: A building photovoltaic data interpolation method based on WGAN and whale optimization algorithm is provided, which includes: obtaining historical building roof photovoltaic output data, perform preprocessing on the historical building roof photovoltaic output data, and uses CNN to build a GAN; describing missing value position of preprocessed data by using a binary mask matrix, and setting Wasserstein distance to define a loss function of a GAN generator and a discriminator; taking the loss function as a fitness function, optimizing an input to the GAN generator through a whale optimization algorithm and obtaining optimized candidate samples; fusing the optimized candidate samples and a photovoltaic data processed by the binary mask matrix to obtain completed reconstructed samples, so as to improve the complementary accuracy, optimize the random noise, remove the unfavorable influencing components, and provide services for building rooftop PV data interpolation more accurately.

Abstract: The present disclosure provides, among other things, a method for efficiently producing a cell population enriched in Natural Killer cells (NK cells) from induced pluripotent cells.

Abstract: An air conditioning system includes a main circuit having a multi-stage compressor, a condenser, a throttling element and an evaporator connected by pipelines; and a cooling branch, the inlet of which is connected to the main circuit between the condenser and the throttling element, and the outlet of which is connected to at least one of the first-stage suction port and the intermediate-stage suction port of the multi-stage compressor, wherein refrigerant from the cooling branch flows through the drive motor of the multi-stage compressor, and a regulating valve for controlling the opening of the cooling branch is provided on the cooling branch; and a control module that controls the opening of the regulating valve on the cooling branch based on the temperature of the outlet downstream of the drive motor on the cooling branch and the intermediate suction pressure of the intermediate-stage suction port of the multi-stage compressor.

Abstract: A computer-implemented method includes: receiving an inquiry request message identifying a first payment transaction having a plurality of transaction parameters and a risk score, where the risk score is generated by a machine-learning model based on the plurality of transaction parameters; for each transaction parameter of the plurality of transaction parameters, perturbing a value of the transaction parameter and re-analyzing the first payment transaction with the machine-learning model to generate a perturbed risk score based on the perturbed transaction parameter; determining at least one impact parameter from the plurality of transaction parameters by comparing the perturbed risk scores generated for each of the plurality of transaction parameters; and generating an inquiry response message based on the at least one impact parameter.

Abstract: Composites comprising metal-oxide-functionalized carbon nanotubes with metal nanoparticles deposited thereon are provided. These composites can be used as a working electrode in an electrochemical sensor to detect arsenite in aqueous solutions. The composite can electrochemically reduce As3+ to As0 due to increasing adsorption capability. In one embodiment, Au nanoparticles are deposited on the TiOx/CNT electrode to facilitate the adsorption of As3+ on the electrode surface for further electrochemical reduction process. Square wave voltammetry (SWV) is performed to detect the electrochemical reduction of arsenite in water.

Abstract: A sensing platform for continuous water resource monitoring by electrochemical detection and solution parameter correction is provided. The sensing platform employs a solid-state electrolyte three-electrode cell, creating a high ionic strength environment within the solid-state electrolyte membrane, which is in ion exchange equilibria with the sampled solution. This device may be used as a standalone sensor in environments where the water parameters (pH temperature, and ionic strength) are controlled, or in concert with compensation sensors where water parameters are not controlled.

Abstract: A carbon nanotube (CNT) ion-selective field effect transistor (IS-FET) integrated device is used to detect nitrate ion in water. The device is operated as an IS-FET sensor, holding the measured potential between the drain electrode and an external reference electrode constant with a potentiometric circuit. Transduction occurs by changes in the effective CNT film gate potential with changes in the phase boundary potential of an ion-selective membrane (ISM) film. Moreover, the nitrate ISM film makes the device highly selective towards nitrate sensing. This printable IS-FET nitrate sensor enables real-time and high-resolution measurements and recording of nitrate ion in water at low cost.

Abstract: Some embodiments of the disclosure provide a flatness detection device. In an embodiment, the flatness detection device includes a back plate, an electromagnet, a cross beam, a probe, and a limiting frame. The limiting frame and the electromagnet are provided side by side on the back plate. The cross beam is located above the limiting frame and the electromagnet. The probe vertically penetrates the cross beam and the limiting frame. A spring is provided between the cross beam and the electromagnet. The spring is movable in a vertical direction by a guide, the movement being at least one of compression and extension.

Abstract: The present disclosure relates to integrated circuits, and more particularly, to a sense amplifier circuit for current sensing in a memory structure and methods of manufacture and operation. In particular, the present disclosure relates to a circuit including: a sensing circuit including a first set of transistors, at least one data cell circuit, and a reference cell circuit; a reference voltage holding circuit comprising a second set of transistors and a bitline capacitor; and a comparator differential circuit which receives a data sensing voltage signal from the sensing circuit and a reference voltage level from the reference voltage holding circuit and outputs an output signal.

Abstract: Switching devices for a printing mode of a 3D printer are disclosed. In some embodiments, the switching devices includes: a component platform with at least two platform bodies (200); at least two handpiece guiding parts (110); at least two platform guiding parts (210); at least two handpiece transmission mechanisms (120); a handpiece drive mechanism configured to drive the handpiece transmission mechanisms (120) to move synchronously; at least two platform transmission mechanisms (220); and a platform drive mechanism configured to drive the platform transmission mechanisms (220) to move synchronously.

Abstract: A method for adjusting height of a 3d printer nozzle. In an embodiment, the method uses a fully wavy line as a reference line. The method includes the following steps. Determining an initial value of a height difference between the nozzle and a bottom of a probe by using a feeler gauge. Moving the nozzle vertically to adjust the height based on the initial value, obtaining a printing height of a first line, and printing the first line. Determining whether the first line is a fully wavy line. Adjusting the height of the nozzle for N times according to a preset step value, and printing N lines with corresponding heights. Determining whether the N lines have a fully wavy line. Calculating the height difference between the nozzle and the bottom of the probe by an equation. Adjusting the height of the nozzle.

Abstract: Extruder calibration methods and systems for a dual-extruder 3D printer are disclosed. In an embodiment, an extruder calibration method for a dual-extruder 3D printer having a left extruder and a right extruder includes the following steps: (1) building up a rectangular coordinate system on a heat bed of a 3D printer; (2) obtaining a first offset by calculating an offset between the left extruder and the right extruder in an X-axis direction; (3) obtaining a second offset by calculating an offset between the left extruder and the right extruder in a Y-axis direction; and (4) calibrating the left extruder and the right extruder according to the first offset and the second offset.

Abstract: Some embodiments of the disclosure provide a flatness detection device. In an embodiment, the flatness detection device includes a back plate, an electromagnet, a cross beam, a probe, and a limiting frame. The limiting frame and the electromagnet are provided side by side on the back plate. The cross beam is located above the limiting frame and the electromagnet. The probe vertically penetrates the cross beam and the limiting frame. A spring is provided between the cross beam and the electromagnet. The spring is movable in a vertical direction by a guide, the movement being at least one of compression and extension.

Abstract: Disclosed is a three-port static random access memory (3P-SRAM) that performs XNOR operations. The cell has a write port and first and second read ports. Read operations are enabled through either the first read port using a first read wordline and a common read bitline or the second read port using a second read wordline and the common read bitline. Read wordline activation is controlled such that only one read wordline is activated (i.e., receives a read pulse) at a time. As a result, a read operation through either read port effectively accomplishes an XNOR operation. Also disclosed is a memory array, which incorporates such cells and which performs XNOR-bitcount-compare functions. Since XNOR-bitcount-compare functions are used in XNOR-NET type binary neural networks (BNNs), the memory array can be employed for implementing such a BNN designed for improved performance, scalability, and manufacturability. Also disclosed is an in-memory computing method.

Abstract: This application provides example camera assemblies and example assembly methods. One example method includes plastic-packaging a surface mount electronic component and an image sensor to form a target plastic-packaged module, where the target plastic-packaged module includes an active surface, and where a solder end of the surface mount electronic component and a solder end of the image sensor are exposed on the active surface. A redistribution layer (RDL) can then be prepared and the RDL can then be drilled to form a through-hole, where the through-hole is opposite to a photosensitive area of the image sensor, where the RDL includes a dielectric layer and metal wiring disposed at the dielectric layer. The metal wiring exposed on the first surface of the RDL can then be connected to a solder end on the active surface of the target plastic-packaged module.

Abstract: Disclosed is a three-port static random access memory (3P-SRAM) that performs XNOR operations. The cell has a write port and first and second read ports. Read operations are enabled through either the first read port using a first read wordline and a common read bitline or the second read port using a second read wordline and the common read bitline. Read wordline activation is controlled such that only one read wordline is activated (i.e., receives a read pulse) at a time. As a result, a read operation through either read port effectively accomplishes an XNOR operation. Also disclosed is a memory array, which incorporates such cells and which performs XNOR-bitcount-compare functions. Since XNOR-bitcount-compare functions are used in XNOR-NET type binary neural networks (BNNs), the memory array can be employed for implementing such a BNN designed for improved performance, scalability, and manufacturability. Also disclosed is an in-memory computing method.

Abstract: Switching devices for a printing mode of a 3D printer are disclosed. In some embodiments, the switching devices includes: a component platform with at least two platform bodies (200); at least two handpiece guiding parts (110); at least two handpiece guiding parts (110); at least two platform guiding parts (210); at least two handpiece transmission mechanisms (120); a handpiece drive mechanism configured to drive the handpiece transmission mechanisms (120) to move synchronously; at least two platform transmission mechanisms (220); and a platform drive mechanism configured to drive the platform transmission mechanisms (220) to move synchronously.

Abstract: An all-fiber Q-switched laser including a laser resonant cavity and a loop optical system is provided. The loop optical system is disposed inside the laser resonant cavity, and the all-fiber Q-switched laser generates a pulsed laser through the loop optical system. The loop optical system includes a plurality of wavelength-division elements and a saturable absorber. One of the wavelength-division elements is coupled with another one of the wavelength-division elements through corresponding first connecting fibers. Two ends of the saturable absorber are respectively coupled to second connecting fibers of the wavelength-division elements, wherein the saturable absorber and the two wavelength-division elements form a loop such that an auxiliary unsaturated light source can be transmitted in the loop.

Abstract: A system and a method for driving light emitters of a liquid crystal display (LCD) backlight module is disclosed. The system drives the light emitters by supplying a constant current and a pulse width modulated current to an individual light emitter, the pulse width modulated current being determined in accordance with an optical output of the light emitter. Accordingly, the system can provide a desired amount of current to the light emitters, and individually control the optical output of the light emitters.