Abstract: A low noise amplifier topology can achieve very low noise figure by applying multiple magnetic coupling between gate matching inductors and source degeneration inductor of a field effect transistor. The resulting low noise amplifier has smaller inductors, which can have lower thermal noise contribution, and can maintain good gain and linearity performance. For example, a low noise amplifier includes a first inductor to receive an input; a second inductor coupled to the first inductor in series; a first field effect transistor device whose gate receives a signal from the second inductor; and a third inductor coupled to a source of the first field effect transistor device, where the third inductor is magnetically positively coupled to the first inductor and the second inductor.

Abstract: Provided is a source-load cooperation access method for a power distribution region. The method includes: establishing a timing feature model of a distributed generator and a timing feature model of a load respectively, acquiring a timing feature of the distributed generator in an access power distribution region by using maximum likelihood estimation and acquiring a timing feature of a user which accesses the power distribution region by using classification and regression trees; and inputting the timing feature of the distributed generator and the timing feature of the user which access the power distribution region into a combination optimization model, and determining a source-load access feeder through optimization.

Abstract: The present application discloses a case assembly for a server and a server having same. The case assembly (100) is divided into a first case body (10) and a second case body (20) in a first direction, both a side of the first case body (10) that faces the second case body (20) and a side of the second case body (20) that faces the first case body (10) are open, and the first case body (10) and the second case body (20) are detachably connected and jointly define an accommodation space.

Abstract: A flexible display panel. The flexible display panel includes: a flexible substrate; a display element arranged on the flexible substrate; and a packaging layer covering the display element, the packaging layer including an inorganic thin film and an organic thin film that are stacked alternately, in which two protrusion structures that are engaged with each other are arranged between at least two adjacent thin films of the packaging layer.

Abstract: Storage management techniques involve: obtaining a historical usage of storage capacity for a storage device, and a historical feature characterizing the historical usage of storage capacity; generating a predicted usage of storage capacity for the storage device based on the historical feature and a predictor for predicting a usage of storage capacity; and updating the predictor by comparing the historical usage of storage capacity with the predicted usage of storage capacity. Therefore, such techniques can accurately predict the usage of storage capacity for the storage device.

Abstract: This disclosure relates to the identification of interactions between ligands and in-membrane proteins using nuclear magnetic resonance spectroscopy. Also provided are methods for high-throughput identification of in-membrane ligand-membrane protein interactions.

Abstract: Disclosed are a PCB heat dissipation assembly (100) and a server having same. The PCB heat dissipation assembly (100) includes: a PCB board (1), a plurality of chips (11) being arranged on the PCB board (1); at least one heat sink (2), the heat sink (2) being arranged on the plurality of chips (11), and the heat sink (2) including a heat dissipation air duct (21); and an air baffle (3), the air baffle (3) being arranged adjacent to the at least one heat sink (2), the air baffle (3) being located on one side of the at least one heat sink (2), and the air baffle (3) extending along the heat dissipation air duct (21).

Abstract: An in-situ poled ferroelectric prints with true 3D geometry is provided with an intercalated electrode design where soft polymer matrixes are selected for the ferroelectric layers, and rigid polymer matrixes are selected for the electrode layers, thus mimicking nacre architecture with a ceramic-like piezoelectric property and bone-like fracture toughness. Lithium-doped potassium sodium niobite (Li-KNN) microparticles may be used to produce ferroelectric properties and to create strong interfacial bonding with the interfacing electrode layers. Polylactic acid (PLA) in the electrode layers may be used to facilitate strong interfacial bonding with the Li-KNN microparticles.

Abstract: Disclosed are a mercury cadmium telluride-black phosphorus van der Waals heterojunction infrared polarization detector and a preparation method thereof. The structure of the detector from bottom to top comprises a substrate, a mercury cadmium telluride material, an insulating layer, a two-dimensional semiconductor black phosphorus, and metal electrodes.

Abstract: A flexible piezoelectric thin film, and method of manufacture, has a polyvinyl alcohol (PVA)-glycine-PVA sandwich heterostructure. The thin film is manufactured by evaporating the solvent from a glycine-PVA mixture solution. The film automatically assembles into the PVA-glycine-PVA sandwich heterostructure as it is salted out. Strong hydrogen bonding between the oxygen atoms in glycine and hydroxyl groups on PVA chains are responsible for the nucleation and growth of the piezoelectric ?-glycine and alignment of the domain orientation.

Abstract: Systems, devices, and methods related to phase shifters are provided. An example apparatus includes a first node to receive an input signal, a second node, a first signal path coupled between the first node and the second node, and a second signal path coupled between the first node and the second node. The first signal path includes a positively coupled transformer. The second signal path includes a negatively coupled transformer. The second signal path is out-of-phase with the first signal path at the second node. The apparatus further includes a plurality of switches to select the first signal path or the second signal path. The apparatus may further include tuning capacitors to improve phase-shifting performance of the apparatus.

Abstract: Wideband baluns with enhanced amplitude and phase balance are provided. The wideband balun includes a first transmission line connected between a first port and a third port, and a second transmission line connected between a second port and a fourth port, and a third transmission line connected between the third port and a reference voltage, such as ground. To enhance phase and/or amplitude balance of the wideband balun, the wideband balun further includes a compensation structure operable to provide at least one of capacitive compensation or inductive compensation to balance the wideband balun. For example, in certain implementations, the compensation structure includes at least one of (i) a capacitor connected between the first port and the second port or (ii) a fourth transmission line connected between the first transmission line and the third port.

Abstract: The present application relates to a method for evaluating an operation of a distribution network based on data capture and Spark. The method includes: acquiring a packet from a terminal, and mirroring the packet through a mirroring port of a switch to acquire a mirror packet of the packet; analyzing the mirror packet, acquiring a 101/104 protocol packet, and storing the 101/104 protocol packet into an HDFS; acquiring the 101/104 protocol packet from the HDFS, parsing the 101/104 protocol packet on a Spark platform to acquire a parameter in the 101/104 protocol packet, and analyzing and processing the parameter to obtain a key indicator for evaluating the operation of the distribution network; and displaying the key indicator through a web page.

Abstract: A wearable medical bandage is provided having an energy harvesting generator that harvests mechanical energy from the user's natural body and muscle motions to produce electrical energy. The electrical energy induces an electric potential across the wound opening producing accelerated skin wound recovery under the voltage fluctuations produced by the power generator.

Abstract: A transformable robot comprises an arm structure, a leg structure and a head of the robot which are fixed to a ribcage structure. The arm structure includes a left arm and a right arm; the leg structure includes a left leg and a right leg; the ribcage structure includes a first steering gear fixed on an upper part of a second fixing frame; a rotating output shaft of the first steering gear successively passes through a top wall of the second fixing frame and a first backing plate to fixedly connected to a first steering wheel fixed on a first rotating frame; the first steering wheel is provided with an arc-shaped limited opening; a limited column on the first backing plate is movably passed through the limited opening; the rotating output shaft of the first steering gear rotates to drive the first rotating frame to rotate.

Abstract: A transient or biodegradable battery is provided having a filament structure that limits the speed of reaction allowing for a longer duration of battery power with a controlled current limit. In one embodiment, the filament may be constructed of zinc microparticles or nanoparticles having a thin outer insulation whereby a chemical reaction at the center core results in the progressive disintegration of the insulation revealing more core material. In one embodiment, microparticles or nanoparticles are coated with outer layers of chitosan and Al2O3 nanofilms, respectively, with designable discharge current and battery lifespan by controlling the exposed cross-sectional area of the zinc microparticle center core and the length of the filament, respectively. This novel structure of biodegradable battery provides improved control of battery life and power output, providing a promising solution to power transient medical implants.

Abstract: Provided are a method and a device for identifying a distribution network topology error. The method includes: calculating a voltage of a coupling node to which each load belongs and obtaining a voltage sample space of coupling nodes to which all loads belong; calculating a current of a branch to which each load belongs and obtaining a current sample space of branches to which all loads belong; calculating a voltage correlation coefficient and a current correlation coefficient respectively between different loads according to the obtained voltage sample space and the current sample space; and completing verification and correction of the distribution network topology.

Abstract: Disclosed are a distribution transformer terminal and a method for monitoring a state of a distribution transformer court device. The distribution transformer terminal includes an ARM core processor, a carrier communication module connected to a court device, a sub-G wireless communication module connected to the court device and a GPS module connected to the court device. The ARM core processor is connected to the carrier communication module, the sub-G wireless communication module and the GPS module. The ARM core processor is configured to identify a phase of the court device and a court to which the court device belongs, acquire an operating state and fault information of the court device through the sub-G wireless communication module, and acquire geographical location information of the court device through the GPS module.

Abstract: This application provides a control method for a switching apparatus. The switching apparatus includes at least two switching devices connected in parallel, a minimum pulse width limit of the first switching device is less than a minimum pulse width limit of the second switching device, and the first switching device and the second switching device are in a turn-off state. The method includes: obtaining on-state holding time of the switching apparatus; controlling the at least two switching devices to remain in a cut-off state when the on-state holding time is less than the minimum pulse width limit of the first switching device; and controlling the first switching device to perform a switching operation when the on-state holding time is greater than or equal to the minimum pulse width limit of the first switching device. The application can reduce a loss of the switching device and reduce output distortion.

Abstract: A transformable robot, including a car body, under which the robot is equipped with a right leg and a left leg side by side, and on the upper part of which a right arm is on the right side and a left arm is on the left side. A car head is set in front of the car body and a carriage is set on the back of the car body. A head of the robot is installed on the top of the car body, and the right leg, the left leg, the right arm and the left arm are rotatably installed on the car body.