Abstract: A microwell array chip, a use method therefor, and a detection apparatus. The microwell array chip includes a microwell array substrate, and the microwell array substrate includes n reaction chambers, and an idle region; an array of the n reaction chambers is disposed in the microwell array substrate, and the idle region is disposed around the n reaction chambers; each reaction chamber is configured to accommodate a sample to be tested, and the shape of an orthographic projection of the reaction chamber on a first reference plane where the first main surface is located is of a regular N-gon; the area of the idle region is divided into n? virtual units, and the shape of the orthographic projection of each virtual unit on the first reference plane is the same as the shape of the orthographic projection of the reaction chamber on the first reference plane.

Abstract: An automatic recognition method for a dry quasi-stationary front in Kunming, Yunnan, China is provided. The automatic recognition method includes: reading data; calculating, by a differential method, a temperature lapse rate between each layer of each point from a ground surface to 650 hPa, and acquiring a maximum inversion trend value; acquiring an initially selected inversion distribution based on the maximum inversion trend value; removing a nighttime clear sky radiation inversion, retaining only a frontal inversion, and binarizing (0, 1); finding a boundary between inversion and non-inversion; removing the abnormal candidate frontal points, and acquiring frontal nodes; removing meso- and micro-scale systems; and performing one-dimensional Gaussian filtering on longitude data of the frontal nodes, and connecting the filtered frontal nodes to acquire a quasi-stationary front in Kunming, Yunnan, China.

Abstract: A control circuit for a resonant converter having at least two output signals, the control circuit including: a charge feedback circuit configured to generate a charge feedback signal representing a resonant current of a resonant circuit in the resonant converter; and a switching control signal generating circuit configured to generate switching control signals according to the charge feedback signal and feedback signals representing error information of each of the at least two output signals.

Abstract: A control circuit for a resonant converter, can include: a feedforward circuit configured to generate a feedforward current; a charge feedback circuit configured to receive a resonant current sampling signal representing a resonant current of the resonant converter in a first mode to generate a charge feedback signal, and to receive the resonant current sampling signal and the feedforward current together to generate the charge feedback signal in a second mode; and a driving control circuit configured to generate driving signals according to the charge feedback signal and a first threshold signal, in order to control switching states of power transistors of the resonant converter, where the first threshold signal is generated according to an error compensation signal representing an error information between a feedback signal of an output signal of the resonant converter and a reference signal.

Abstract: Provided are a method and apparatus for measuring a geometric parameter of an object, and a terminal. The method includes: establishing a three-dimensional coordinate system based on a real environment, in accordance with a first depth image of the real environment photographed by a camera component; obtaining pose data of a terminal, obtaining a second depth image and a two-dimensional image of an object to be measured, and displaying the two-dimensional image on a display interface of the terminal; in response to a measurement point selection instruction, determining a coordinate in the three-dimensional coordinate system of a measurement point based on the pose data, the second depth image and the two-dimensional image, and determining a geometric parameter of the object to be measured based on the coordinate; and displaying, in the two-dimensional image, the geometric parameter of the object to be measured.

Abstract: A delta image sensor comprising a plurality of acquisition circuits corresponding to at least one pixel. Each acquisition circuit includes at least one sensor circuit comprising a photosensor to generate a sensor signal, VSIG, depending on a light signal illuminating the photosensor; at least one single slope analogue to digital conversion, A/D, circuit configured to convert a current VSIG to a digital signal, wherein the A/D circuit (12) is configured to use one of a plurality of ramps for the conversion; at least one digital storage circuit configured to store a representation of at least one digital signal corresponding to a previous VSIG; at least one digital comparison circuit configured to compare the level of the stored representation with the current VSIG to detect whether a changed level is present; and at least one digital output circuit configured to generate an event output, in response to the changed level.

Abstract: Provided are an image sensor and an image output method thereof, and an optoelectronic device. The image sensor includes a plurality of pixels, which include a photoelectric detection circuit, a signal readout circuit, a floating diffusion node, an integrating capacitor, a transmission circuit, an adaptive power supply, and a signal processing circuit. The floating diffusion node integrates the photoelectric charge into the integrating capacitor to obtain an integral voltage. The signal processing circuit generates a logarithmic voltage and a logarithmic current. After the floating diffusion node receives the photoelectric charge, the target voltage is much less than the reference voltage. The node current is the photocurrent, and the node voltage is the integral voltage. When the target voltage increases to the reference voltage, the node current is the logarithmic current, and the node voltage is the logarithmic voltage, so the signal readout circuit finally outputs the corresponding image signals.

Abstract: A zero-voltage-switching control circuit for a switching power supply having a main power switch and a synchronous rectifier switch, is configured to: control the synchronous rectifier switch to be turned on for a first time period before the main power switch is turned on and after a current flowing through the synchronous rectifier switch is decreased to zero according to a switching operation of the main power switch in a previous switching period of the main power switch; and where a drain-source voltage of the main power switch is decreased when the main power switch is turned on, in order to reduce conduction loss.

Abstract: A controller of a switching power supply can include: a frequency-jittering control circuit configured to generate a first frequency-jittering signal and a second frequency-jittering signal; where a jittering range of an operating frequency of a power transistor in the switching power supply is adjusted by the first frequency-jittering signal; and where a jittering amplitude of a peak value of an inductor current of the switching power supply is adjusted by the second frequency-jittering signal.

Abstract: Provided are an image sensor and an image output method and application thereof. The image sensor includes an input circuit, configured to perform a first photoelectric conversion on incident light to generate a photoelectric current in an EVS mode working period, and performs s second photoelectric conversion on the incident light to generate photoelectric charges in an APS mode working period; an EVS circuit configured to output a corresponding event signal according to a difference value between a first voltage corresponding to a photoelectric current and a reference voltage; an APS circuit configured to output a corresponding grayscale signal according to a second voltage corresponding to photoelectric charges; and a control circuit configured to output a corresponding APS image according to the grayscale signal and output a corresponding EVS image according to the event signal.

Abstract: A delta image sensor comprising an arrangement of pixels and a plurality of acquisition circuits corresponding to at least one pixel. Each acquisition circuit includes at least one sensor circuit comprising a photosensor to generate a sensor signal, VSIG, depending on a light signal; at least one analogue to digital conversion, A/D, circuit configured to convert a current VSIG to a digital signal; at least one digital storage circuit configured to store a representation of at least one digital signal corresponding to a previous VSIG; at least one digital comparison circuit to compare the level of the stored representation with the current VSIG to detect whether a changed level is present; and at least one digital output circuit configured to generate an event output under the condition of the changed level. A digital representation may be externally written to the digital storage circuit of the at least one pixel.

Abstract: A delta image sensor comprising an arrangement of pixels and acquisition circuits corresponding to at least one pixel. Each acquisition circuit includes a sensor circuit comprising a photosensor to generate a sensor signal, VSIG, depending on a light signal illuminating the photosensor; at least one analogue to digital conversion, A/D, circuit configured to convert a current VSIG to a digital signal; at least one digital storage circuit configured to store a representation of at least one digital signal corresponding to a previous VSIG; a digital comparison circuit configured to compare the level of the stored representation with the current VSIG to detect whether a changed level is present; and a digital output circuit configured to generate an event output when the level has changed. The repeat rate of the analogue to digital conversion is chosen from one or more repeat rates corresponding to modulation of the light signal.

Abstract: The present disclosure relates to an image sensor comprising a plurality of pixel circuits each comprising a photodiode connected between ground and a floating diffusion (FD) node, a reset transistor (MRST) connected between a first voltage supply and the floating diffusion (FD) node, and a source follower transistor (MSF), wherein its drain is connected to a second voltage supply, the gate is connected to a floating diffusion (FD) node and the source is connected to a row select transistor (MSEL). The row select transistor (MSEL) is connected between the source of the source follower transistor (MSF) and a common column output. Each pixel circuit is configured to output an output signal corresponding to a light incident on the photodiode. Each pixel circuit includes at least one additional transistor for configuring each pixel circuit to selectively output a linear integration signal or a logarithmic signal.

Abstract: The invention relates to the field of biomedicine. In particular, the invention relates to a live strain of Staphylococcus aureus and uses thereof. More particularly, the invention relates to a live strain of Staphylococcus aureus which lacks adenosine synthase A (AdsA) activity, to a vaccine against Staphylococcus aureus infection comprising said live strain, and a method for preventing and/or treating Staphylococcus aureus infection in a subject by administering said live strain.

Abstract: A driving circuit and a driving method are provided. According to embodiments of the present disclosure, a power switch is driven by constant voltage or constant current during different time periods. The power switch is driven by using a first driving current during a Miller platform period, and the power switch is driven by using a second driving current when the Miller platform period ends, where the first driving current is less than the second driving current, so as to optimize EMI, reduce loss and improve efficiency.

Abstract: A control circuit for a resonant converter, that is configured to: adjust a conduction time of one power switch and a conduction time of one corresponding synchronous rectifier switch in the resonant converter in a resonant period detection mode; control a resonance current to cross zero twice during the conduction time of the synchronous rectifier switch; and obtain a resonant period of the resonant converter.