Abstract: A zero-Poisson-ratio honeycomb structure and an interlocking assembly manufacturing method thereof are provided, and belong to the field of light structure design and manufacturing. The honeycomb structure is formed by combining a four-pointed star shaped structure and horizontal and vertical honeycomb wall arrays at star corners. The zero-Poisson-ratio honeycomb structure not only has the zero-Poisson-ratio characteristic, but also can achieve respective design of in-plane and out-of-plane mechanical properties. Meanwhile, due to the existence of the horizontal honeycomb walls and the vertical honeycomb walls, the connection of multiple honeycomb walls at angular points in the honeycomb structure is avoided. Moreover, a novel manufacturing mode is provided for the honeycomb structure in addition to prepare the honeycomb structure by utilizing a 3D printing process. The honeycomb structure can be manufactured by combining an interlocking assembly process with resin matrix composites.

Abstract: A wirelessly powered resistive sensor is presented. The sensor includes: an antenna; a parametric resonator and a resistive loop circuit. The parametric resonator is configured to receive a pumping signal from the antenna and operable to oscillate at two frequencies. The resistive loop circuit is inductively coupled to the parametric resonator, such that oscillation frequency of the parametric resonator changes (e.g., linearly) with changes in resistance of the resistance loop circuit. The resistance of the resistor in the resistive loop circuit approximately equals the impedance of the resistive loop circuit at one resonance frequency of the parametric resonator. The resistive sensor may further include a resonator enhancer circuit arranged adjacent to the parametric resonator and operates to resonate at frequency of the pumping signal.

Abstract: Thermally compensated waveguides are disclosed herein. According to one aspect, the present disclosure proposes new ways to combine negative TOC (NTOC) material layers within the waveguides. NTOC materials can be implemented in one or more of a cladding layer, a core rib/channel waveguide, a horizontally segmented waveguide, a vertically segmented waveguide, a sub-wavelength grating structure, and/or in various other waveguide structure implementations including arbitrary core or cladding shapes. The integration of NTOC materials improves the temperature dependence of the waveguide spectrum. The need for fast and efficient optical-based technologies is increasing as Internet data traffic growth rate is overtaking voice traffic, pushing the need for optical communications.

Abstract: The present invention provides a method for preparing an in-situ ternary nanoparticle-reinforced aluminum matrix composite (AMC). In this method, an in-situ reaction generation technique is used, and with a powder containing formation elements for producing reinforcing particles as a reactant, in conjunction with a low-frequency rotating magnetic field/ultrasonic field regulation technique, an aluminum-based composite material is prepared using nanoparticle intermediate alloy re-melting. An AA6016-based composite material reinforced by ternary nanoparticles has an average particle size of 65 nm, and has an obvious refinement phenomenon compared with unitary and dual-phase nanoparticles.

Abstract: Disclosed is a ship identity recognition method based on the fusion of AIS data and video data, comprising: collecting a ship sample to train a ship target classifier; performing, using the ship target classifier, ship target detection on a video frame collected by a gimbal camera; performing a comparison with a recognized ship library to filter a recognized ship; acquiring AIS data and filtering same across time and spatial scales; predicting the current position of an AIS target using a linear extrapolation method and converting the current position to an image coordinate system; performing position matching between a target to be matched and the converted AIS target; and performing feature extraction on the successfully matched target and storing the extracted feature, together with ship identity information, into the recognized ship library.

Abstract: The invention discloses a method for synthesizing 1,7-naphthyridine derivatives, which relates to the technical field of synthesizing pharmaceutical intermediates and organic chemical intermediates, wherein the method includes: (1) 2-chloro-3-amino-pyridine being used as Compound I as a starting material, and protecting an amino group to prepare Compound II; (2) the Compound II reacting with an aldehydation reagent under alkaline conditions to obtain Compound III; (3) cyclizing the Compound III with acrylate compounds under the action of Lewis acid to prepare compound IV.

Abstract: A radar device may include a digital to analog converter (DAC) stage. The DAC stage may generate a plurality of analog signals. The DAC stage may generate a different analog signal for each transmitter chain of a plurality of transmitter chains. Each analog signal of the plurality of analog signals may represent a single digital signal. Each transmitter chain of the plurality of transmitter chains may include a transmit chain portion and switched analog beamforming network (BFN). The transmit chain portion may generate a plurality of intermediate analog signals representative of the corresponding analog signal. The switched analog BFN may generate a plurality of analog transmit signals for an intermediate analog signal of the plurality of intermediate analog signals. The plurality of analog transmit signals may include a beam formed in accordance with a state of the switched analog BFN.

Abstract: A wing model for static aeroelasticity wind tunnel test belongs to the technical field of aeroelasticity tests. In the wing model, the model steel joint and the spar frame are connected with the composite material skin. The piezometer wing ribs are arranged among the spar frame and the plurality of supporting wing ribs. The embedded piezometer tubes are arranged in the piezometer wing ribs, the lightweight filling foam is arranged among the spar frame and the plurality of supporting wing ribs. An outer surface of a frame segment formed by the lightweight filling foam, the plurality of supporting wing ribs, the piezometer wing ribs and the spar frame is covered with the composite material skin. The frame segment is assembled on the model steel joint to form the wing model for the static aeroelasticity wind tunnel test.

Abstract: An optical interconnect device and the method of fabricating it are described. The device includes an in-plane laser cavity transmitting a light beam along a first direction, a Franz Keldysh (FK) optical modulator transmitting the light beam along the first direction, a mode-transfer module including a tapered structure disposed after the FK optical modulator along the first direction to enlarge the spot size of the light beam to match an external optical fiber and a universal coupler controlling the light direction. The tapered structure can be made linear or non-linear along the first direction. The universal coupler passes the laser light to an in-plane external optical fiber if the fiber is placed along the first direction, or it is a vertical coupler in the case that the external optical fiber is placed perpendicularly to the substrate surface. The coupler is coated with highly reflective material.

Abstract: A drum washing machine includes a tub; a drum rotatably arranged in the tub; an agitator rotatably arranged in the drum; a drive in transmission connection with the drum via a main shaft which transmits a torque of the driver to the drum; and a planetary gear assembly in transmission connection with the main shaft and the agitator and transmitting a torque of the main shaft to the agitator.

Abstract: Embedded three-dimensional electrode capacitors, and methods of fabricating three-dimensional electrode capacitors, are described. In an example, an integrated circuit structure includes a first metallization layer above a substrate, the first metallization layer having a first conductive structure in a first dielectric layer, the first conductive structure having a honeycomb pattern. An insulator structure is on the first conductive structure of the first metallization layer. A second metallization layer is above the first metallization layer, the second metallization layer having a second conductive structure in a second dielectric layer, the second conductive structure on the insulator structure, and the second conductive structure having the honeycomb pattern.

Abstract: An optical modulator includes a substrate, a first dielectric layer over the substrate, a rib waveguide including a PN junction on the first dielectric, a second dielectric layer over the rib waveguide and a stressor layer including a metal, where the first or the second dielectric is between the stressor layer and the PN junction.

Abstract: The present invention discloses a real-time online prediction method for a dynamic junction temperature of a semiconductor power device.

Abstract: A drum washing machine includes a tub; a drum rotatably arranged in the tub; an agitator rotatably arranged in the drum and having a water spray hole; a drive in transmission connection with the drum via a main shaft which transmits a torque of the driver to the drum; a planetary gear assembly in transmission connection with the main shaft and the agitator and transmitting a torque of the main shaft to the agitator; and a water supply device in communication with one of the tub and a water source as well as the agitator respectively, supplying water in the tub or the water source to the agitator, and spraying the water into the drum through the water spray hole.

Abstract: Some embodiments include apparatuses and electrical models associated with the apparatus. One of the apparatuses includes an integrated circuit having a die; a package substrate; first conductive connections coupled between the die and a first side of the package substrate; second conductive connections located on a second side of the package substrate opposite from the first side. The second conductive connections are coupled to the first conductive connections through conductive paths in the package substrate. The first conductive connections and the conductive connections are associated with an S-parameter of an electrical model of the integrated circuit package. The electrical model further includes at least one of a current value associated with a power rail of the integrated circuit package, an impedance target associated with a location at the integrated circuit package, and a mapping associated with the first and second conductive connections.

Abstract: A method may include: forming a base layer on a substrate; forming a waveguide assembly on the base layer, where the waveguide assembly is surrounded by a cladding layer; forming a trench opening through the cladding layer and the base layer; forming an undercut void by etching the substrate through the trench opening, where the undercut void extends under the waveguide assembly and the base layer; and filling the trench opening with a filler to seal off the undercut void. Other embodiments are described and claimed.

Abstract: Techniques for photonic demultiplexers are disclosed. In the illustrative embodiment, an output of an unbalanced interferometer formed from waveguides is positioned to the input of a slab grating, with several output waveguides collecting light in different wavelength ranges to create different channels for the demultiplexer system. In some embodiments, one or more auxiliary structures may be positioned near the input of the grating to change the structure of the spatial modes being provided as an input to the grating in order to alter the spectra of the output channels.

Abstract: Technology related to disaggregating network traffic is disclosed. In one example, a method can include determining whether individual network flows are members within a first subset of the network flows. A second subset of the first subset of network flows can be learned in response to determining a change in a number of servers available to service the network flows. A first network packet can be forwarded to a first server in response to the first network packet being a member of the first subset of network flows and a member of the learned second subset of the first subset of network flows. A second network packet can be forwarded to a second server in response to the second network packet being a member of the first subset of network flows but not a member of the learned second subset of the first subset of network flows.

Abstract: A vibration suppression method for a servo motor and a load multistage drive system is provided. For a number N of fixed vibration frequencies and one vibration frequency varying with a load position existing in a multistage drive mechanism, a number of N+1 vibration suppression filters are adopted, and each filter is configured to eliminate a corresponding vibration frequency. Fixed vibration frequencies and a vibration frequency varying with a load position in a multistage drive system are measured by using an offline method, and the varied vibration frequencies are made into a two-dimensional table related to the load positions. The fixed vibration frequencies are eliminated by using fixed-frequency parameter vibration suppression filters; and the varied vibration frequencies are eliminated by using a variable-frequency parameter vibration suppression filter, and the vibration frequencies are obtained in real time according to the load positions and the two-dimensional table.

Abstract: A modulator and method of fabrication thereof are provided. In various embodiments, the modulator is a Franz-Keldysh (FK) effect electro-absorption modulator. In an example embodiment, the modulator comprises a waveguide column formed from waveguide material deposited onto a substrate; a first contact layer doped with a P-type dopant and deposited on a first side of the waveguide column; a second contact layer doped with an N-type dopant and deposited on a second side of the waveguide column; and first and second contacts. The first contact is in electrical communication with the first contact layer and the second contact is in electrical communication with the second contact layer.