Abstract: A system and method utilizes optical depth sensors to estimate heart rate of one or more subjects. A method includes obtaining optical depth video data of at least one subject; identifying a region of interest of the subject(s) from optical depth video data; segmenting the region of interest into multiple areas; identifying pixel intensity with respect to time in the areas to produce a depth signal data matrix including multiple spatial channels; decomposing the depth signal data matrix into a low-rank spatial-temporal eigenvector matrix to produce refined depth signal data streams; and projecting the refined depth signal data streams onto a selected pulsatile direction and producing a cardiac pulse signal for the subject(s).

Abstract: The present invention discloses an irradiation-resistant GaN HEMT with decoupling reverse conduction capability and a fabricating method thereof. First gate region metal and second gate region metal are sectionally distributed on a p-type gallium nitride layer in a gate region of the transistor, where the first gate region metal consists of first Schottky metal layers and second ohmic metal layers, and the second gate region metal only consists of a second Schottky metal layer; dielectric layers are filled between the first gate region metal and the second gate region metal, an interconnection metal layer is arranged above the first gate region metal and is connected to an interconnection metal layer above a source to form a reverse freewheeling diode; and gate metal layers are arranged above the second gate region metal and are used as a real gate of the transistor.

Abstract: A radar stethoscope system (12) and method for respiration and heart sound assessment is provided. Embodiments present a method to measure acoustics related to breathing and heartbeat sounds using small-scale radars. Acoustic data derived from the radar return measurements can be based on phase changes of the radar return measurements over a period of time. The radar stethoscope (12) can capture and identify respiratory and heart acoustics as traditionally captured by a clinical stethoscope. Using advanced radar processing algorithms, these acoustic signals can be recovered from a distance and without making contact with the patient (14).

Abstract: The present invention discloses a GaN HEMT transistor with impact energy release capability for use in aerospace irradiation environment and preparation method thereof. The transistor includes a substrate layer, a gallium nitride layer, a barrier layer, and a gate structure successively arranged from bottom to top. The gallium nitride layers on both sides of the barrier layer are respectively provided with a source electrode and a drain electrode on the top surface. The gate structure is located near the source electrode and includes a p-type gallium nitride layer, a dielectric layer, an Ohmic metal pillar, and a Schottky metal layer. The present invention solves the breakdown problem caused by the inability to release impact energy during the switching process by introducing an asymmetric multi-integrated gate structure.

Abstract: A wide bandgap semiconductor structure for an irradiation characteristic test includes a substrate with metal plates and a wide bandgap semiconductor part. The wide bandgap semiconductor part includes a gallium nitride layer, a barrier layer, P-type gallium nitride layers, source ohmic metal layers, and drain ohmic metal layers. The P-type gallium nitride layers are connected to a gate interconnection metal layer via gate metal layers and metal lead wires. A gate top metal layer is provided on the gate interconnection metal layer. Each source ohmic metal layer is provided with a source interconnection metal layer and source top metal layers. Each drain ohmic metal layer is provided with a drain interconnection metal layer and drain top metal layers. The wide bandgap semiconductor part is connected to the metal plates through the source top metal layers, the drain top metal layers, and the gate top metal layer.

Abstract: The present invention discloses a GaN HEMT transistor with impact energy release capability for use in aerospace irradiation environment and preparation method thereof. The transistor includes a substrate layer, a gallium nitride layer, a barrier layer, and a gate structure successively arranged from bottom to top. The gallium nitride layers on both sides of the barrier layer are respectively provided with a source electrode and a drain electrode on the top surface. The gate structure is located near the source electrode and includes a p-type gallium nitride layer, a dielectric layer, an Ohmic metal pillar, and a Schottky metal layer. The present invention solves the breakdown problem caused by the inability to release impact energy during the switching process by introducing an asymmetric multi-integrated gate structure.

Abstract: A precise cardiac data reconstruction method is provided, which may also be referred to herein as radar cardiography (RCG). RCG can reconstruct cardiac data, such as heart rate and/or electrocardiogram (ECG)-like heartbeat waveform signals wirelessly by using advanced radar signal processing techniques. For example, heartbeat and related characteristics can be monitored by isolating cardiovascular activity from strong respiratory interference in spatial spaces: azimuth and elevation. This results in significant improvements to pulse signal-to-noise-ratio (SNR) compared to conventional approaches, facilitating heart-rate variability (HRV) analysis.

Abstract: The present disclosure provides organic-inorganic hybrid polymer particles, which have desirable surface chemistry and optical properties that make them particularly suitable for biological and optical applications. The present disclosure also provides methods of making organic-inorganic hybrid polymer particles. The present disclosure also provides methods of using the organic-inorganic hybrid polymer particles for biological and optical applications.

Abstract: In one embodiment, a method to synthesize highly fluorescent complexes is disclosed. The highly fluorescent complexes are synthesized by using inorganic nanoparticles, coupling agents, linkers, and fluorescent dye molecules. The unique nanoparticle-dye complexes (referred to as “SN-dye”) can provide ultra-bright fluorescent labelling. This is demonstrated by coupling the complexes to the antibody and subsequently using the conjugated antibody for more sensitive immunological detection in flow cytometry applications.

Abstract: A semiconductor device and a method for manufacturing the semiconductor device are provided. The semiconductor device comprises a first electrical conductor, a second electrical conductor, a third electrical conductor, a plurality of metal features and a plurality of active regions. The first electrical conductor extends along a first direction and is electrically coupled to a first voltage. The second electrical conductor extends along the first direction and is electrically coupled to a second voltage. The second voltage is lower than the first voltage. The third electrical conductor extending along the first direction is electrically coupled to a third voltage and disposed between the first electrical conductor and the second electrical conductor. The metal features extend along a second direction perpendicular to the first direction and are formed above the first electrical conductor, the second electrical conductor and the third electrical conductor.

Abstract: System and method for contactless vascular flow measurement are provided. Herein, a measurement circuit emits a radio frequency (RF) waveform toward a human peripheral body part and measures micro-vessel motion in an area of interest of the human peripheral body part based on reflections of the RF waveform. Accordingly, the measurement circuit can extrapolate vascular flow information in the human peripheral body part based on the measured micro-vessel motion. In a non-limiting example, the measurement circuit can detect inner organ vibrations to measure pulse rate, strength, and/or pressure caused by radial arterial blood flow changes at the human peripheral body part. By detecting and measuring the vascular flow via the RF waveform, the vascular flow measurement system provides a non-invasive approach to detect and/or prevent peripheral artery diseases. Further, the measurement circuit emits a very low power, non-ionizing RF waveform to help minimize potential health risks to a human body.

Abstract: Methods, systems, and devices for direct radio frequency (RF) signal processing for heart rate (HR) monitoring using ultra-wide band (UWB) impulse radar are presented. A radar sensor is able to directly sample a received signal at RF which satisfies the Nyquist sampling rate, preserving a subject's vital sign information in the received signal. The vital sign information can be extracted directly from a raw RF signal and thus down conversion to a complex baseband is not required. The HR monitoring performance from the proposed direct RF signal processing technique provides an improvement in continuous HR monitoring as compared against existing methods using a complex baseband signal and/or other measurement techniques.

Abstract: Polymers, monomers, chromophoric polymer dots and related methods are provided. Highly fluorescent chromophoric polymer dots with narrow-band emissions are provided. Methods for synthesizing the chromophoric polymers, preparation methods for forming the chromophoric polymer dots, and biological applications using the unique properties of narrow-band emissions are also provided.

Abstract: Remote recovery of acoustic signals from passive sources is provided. Wideband radars, such as ultra-wideband (UWB) radars can detect minute surface displacements for vibrometry applications. Embodiments described herein remotely sense sound and recover acoustic signals from vibrating sources using radars. Early research in this domain only demonstrated single sound source recovery using narrowband millimeter wave radars in direct line-of-sight scenarios. Instead, by using wideband radars (e.g., X band UWB radars), multiple sources separated in ranges are observed and their signals isolated and recovered. Additionally, the see-through ability of microwave signals is leveraged to extend this technology to surveillance of targets obstructed by barriers. Blind surveillance is achieved by reconstructing audio from a passive object which is merely in proximity of the sound source using clever radar and audio processing techniques.

Abstract: A compound property prediction method is provided for an electronic device. The method includes obtaining chemical structure information of a target compound, the chemical structure information including an atom and a chemical bond, modeling a chemical structure graph according to the chemical structure information, the chemical structure graph including a first node corresponding to the atom and a first edge corresponding to the chemical bond, constructing an original node feature of the first node and an original edge feature of the first edge, performing a message propagation on the first edge according to the original node feature of the first node and the original edge feature of the first edge to obtain propagation state information of the first edge, and predicting properties of the target compound according to the propagation state information of the first edge.

Abstract: The present disclosure provides organic-inorganic hybrid polymer particles, which have desirable surface chemistry and optical properties that make them particularly suitable for biological and optical applications. The present disclosure also provides methods of making organic-inorganic hybrid polymer particles. The present disclosure also provides methods of using the organic-inorganic hybrid polymer particles for biological and optical applications.

Abstract: A backup power system and method of use is provided for powering at least one load wherein the at least one load is normally connected to grid power at a grid frequency. The system and method include providing a generator powered by a fuel in gas phase, such as natural gas; detecting loss of grid power to the at least one load; driving the generator to an operating frequency equal to a predetermined driven frequency that is greater than the grid frequency; and selectively coupling the at least one load to the generator via a load controller while the generator is at the predetermined driven frequency.

Abstract: The present disclosure describes methods, apparatus, and storage medium for node classification and training a node classification model. The method includes obtaining a target node subset and a neighbor node subset corresponding to the target node subset from a sample node set labeled with a target node class, a neighbor node in the neighbor node subset being associated with a target node in the target node subset; extracting a feature subset of the target node subset based on the neighbor node subset by using a node classification model, the feature subset comprising a feature vector of the target node; performing class prediction for the target node subset according to the feature subset, to obtain a predicted class probability subset; and training the node classification model with a target model parameter according to the predicted class probability subset and a target node class subset of the target node subset.

Abstract: A method and an apparatus for identifying a heterogeneous graph and a property corresponding to a molecular space structure and a computer device are provided. The method includes: characterizing a topology structure included in a heterogeneous graph to generate feature information; generating feature vectors corresponding to key nodes on the topology structure included in the heterogeneous graph according to sampling information obtained by sampling the heterogeneous graph and the feature information; aggregating the feature vectors to generate a graph representation vector corresponding to the heterogeneous graph; and classifying the heterogeneous graph according to the graph representation vector to obtain a classification prediction result of the heterogeneous graph.

Abstract: The present disclosure provides organic-inorganic hybrid polymer particles, which have desirable surface chemistry and optical properties that make them particularly suitable for biological and optical applications. The present disclosure also provides methods of making organic-inorganic hybrid polymer particles. The present disclosure also provides methods of using the organic-inorganic hybrid polymer particles for biological and optical applications.