Abstract: A method for determining a layout of a wireless communication network is provided in the present invention. Numerous realizations of user device placement in a considered geometry are measured to reflect the practical distribution of the user devices in a more accurate way than the conventional approach which emulates the randomness of placements of user devices using a tractable stochastic process. Moreover, a scenario sampling approach is used to provide a lower-complexity and higher efficient way to yield optimal base station deployment results while guaranteeing the quality of service of a specified majority of the overall user device realizations.

Abstract: A power amplifier includes an active device and an output matching circuit operably connected with the active device. The output matching circuit includes a bandpass impedance transformer, in particular, a multimode bandpass impedance transformer. The multimode bandpass impedance transformer may include a multimode resonator and coupling feed lines.

Abstract: An electromagnetic device for manipulating a magnetic-responsive robotic device, and an electromagnetic apparatus incorporate one or more such electromagnetic device. The electromagnetic device includes a magnetic core 200 having a first portion and a second portion extends from one side of the first portion. The first portion has a first cross section and defining a first central axis. The second portion has a second cross section smaller than the first cross section, and defines a second central axis parallel to the first central axis. A first electromagnetic coil is arranged around the first cylindrical portion. A second electromagnetic coil is arranged around the second cylindrical portion.

Abstract: An electromechanical sensor includes: an elastic carrier arranged to extend when subjected to an external mechanical load; a sensing sheath arranged at least partially around and along the elastic carrier; wherein the sensing sheath includes an electrically resistive element having a first electrical resistance operable to change upon a change of a dimension of the elastic carrier.

Abstract: A power amplifier circuit includes a first impedance transformer circuit arranged to connect with a carrier device, and a second impedance transformer circuit arranged to connect with a peaking device. Both the first and the second impedance transformer circuit include a parallel impedance transformer arrangement.

Abstract: An electrode for use in an electrical energy storage apparatus includes: a carrier structure including a plurality of vacancies thereon; and an active material arranged to undergo chemical reaction during charging and/or discharging of the electrical energy storage apparatus; wherein the active material occupies the plurality of vacancies on the carrier structure.

Abstract: The present invention provides an open-aperture waveguide fed slot antenna including a feeding section on a substrate integrated waveguide, an H-shaped slot, a matched end, and a bottom metal layer. One end of the feeding section is open and connected to the slot, providing energy feeding to the slot. A long side of the center section of the slot is connected to a top metal part of the feeding section. Another side is connected to the matching end. The matching end includes metal which is connected to the slot, the metallic via wall and the bottom metal of the feeding section which is connected to the metallic via wall. The antenna has high gain, wide gain bandwidth, a simple structure, and low processing cost and can be applied to millimeter-wave frequency bands as well as other frequency bands.

Abstract: A leaky-wave antenna includes a substrate extending along an axis, and a dielectric waveguide extending along the axis and arranged in the substrate. The dielectric waveguide includes at least a top side, a bottom side, and opposite sides arranged between the top and bottom sides. A distance defined between the opposite sides varies along the axis for at least part of a length of the dielectric waveguide.

Abstract: In a handwriting recognition system, a fingertip-motion sensing device has first and second body parts respectively wearable on a distal phalanx and a proximal phalanx of a finger, and a bendable bridge connecting the two body parts. An accelerometer module in the first body part generates acceleration data of the fingertip motion whereas a battery module powering the accelerometer module is in the second body part, avoiding the first body part to be loaded with the battery module so as to reduce hindrance to a user in handwriting. The bridge is wavily shaped, enabling it to be extensible and retractable to avoid spurious interference generation due to unintended movement between the first body part and the distal phalanx. The sensing device wirelessly transmits the acceleration data to a computing device, which analyzes the acceleration data to determine handwritten characters by using a machine-learning classifier, preferably a convolutional neural network.

Abstract: A Doherty power amplifier circuit having a main power amplification device, an auxiliary power amplification device arranged in parallel with the main power amplification device, and a load modulation circuit comprising a harmonic injection circuit connected with respective outputs of the main power amplification device and the auxiliary power amplification device. The harmonic injection circuit is arranged to transfer harmonic components generated at the main power amplification device to the auxiliary power amplification device and harmonic components generated at the auxiliary power amplification device to the main power amplification device, when both the main and auxiliary power amplification devices are operating, for modulating the respective outputs of the main power amplification device and the auxiliary power amplification device.

Abstract: The present disclosure provides an ultrathin, flexible, and tattoo-like triboelectric nanogenerator (TENG) with a well-designed aesthetic pattern. The tattoo-like TENG as an energy harvester can provide not only an aesthetic pattern, but also various practical applications. With the rising acceptance of people towards the tattoo, the tattoo-like TENG offers an alternative tattoo-like epidermal electronics covering traditional tattoo's advantages and further carries out other potential applications.

Abstract: A method for preparing an entropy-stabilized ceramic thin film coating includes preparing a first layer formed by raw materials with a plurality of metal elements, and subjecting the first layer to reaction with anion thereby transforming at least a portion of the first layer to a second layer. The present invention also discloses an entropy-stabilized ceramic thin film coating and a component coated with an entropy-stabilized ceramic thin film coating.

Abstract: There is disclosed a method of preventing privileged web browser extensions installed in a web browser from interfering in interactions between a user of the web browser and a web application server accessible via the web browser, the method including transmitting a web browser-intelligible file to the web browser (including a custom element designating an enclave portion); creating a sandboxed page; copying at least part of the enclave portion to the sandboxed page to create a local enclave; embedding the sandboxed page in a first iframe for rendering; embedding the first iframe in a second iframe; providing an API for the local enclave using web-accessible resources for access to entities outside the local enclave; providing a software agent in the second iframe to act as a proxy between the first iframe and external entities; and encapsulating the second iframe in a shadow document object model associated with a host page.

Abstract: The present invention provides a heat-driven adsorption vacuum dehumidification system including a vapor adsorption apparatus having a water permeable hydrophilic membrane separating the apparatus into at least a feed section and a low-pressure or vacuum section (evaporator), and providing a water vapor pressure difference to extract moisture from the air flowing through the apparatus into the evaporator, followed by adsorption in an adsorption chamber, and subsequently desorbed when acted as a desorption chamber to form water vapor which is condensed in a condenser. Adsorption and desorption chambers inter-change periodically to form a complete system cycle. Heating of chamber/compartment can be from waste heat or a renewable source in the absence of any electricity supplied externally. Related method for using a heat-driven adsorption vacuum dehumidification system to remove moisture from the air is also provided.

Abstract: A method including receiving, at multiple cloud computing servers, multiple streaming data sets for the same sensing task each from a respective client device. The streaming data set from each client device comprises sensed data sensed by one or more sensors of said client device. The streaming data sets are encrypted. Each respective streaming data set from a respective client device is divided into multiple streaming data set portions, each to be received at a respective one of the cloud computing server. The method also includes processing, at each respective cloud computing server, the corresponding streaming data set portions received to generate a corresponding share of a result for the sensing task. The method also includes encrypting, at each respective one of the cloud computing servers, the corresponding share of the result; and facilitating creation or update of a blockchain based on the encrypted shares of the result.

Abstract: A fluid treatment apparatus includes: a first tank portion arranged to receive a first fluid from a first fluid source; a second tank portion adapted to contain a second fluid and receive water molecules of the first fluid from the first tank portion, wherein the concentration of the second fluid is higher than that of the first fluid; a third tank portion arranged to collect the water molecules of the first fluid from the second tank portion; a first membrane positioned between the first and second tank portions and arranged to filter the water molecules of the first fluid from the first tank portion; and a second membrane positioned between the second and third tank portions and arranged to obtain the water molecules of the first fluid from the second tank portion, wherein the second membrane has a greater permeability than that of the first membrane.

Abstract: The present invention provides a power efficient content-addressable memory (CAM) architecture that is implementable on FPGAs. The provided CAM architecture comprises an array of CAM cells having a width CW and a depth CD, and being grouped into a B number of memory banks. Each of the CAM cells is configured for storing a memory bit and comprises a plurality of flip-flops configured to store at least a masking bit indicating the ternary nature of the stored memory bit and a storing bit saving the binary information of the stored memory bit. The provided CAM architecture allows activating only one bank in multiple banks irrespective of nature of the data set and is updated in a single access and saves power consumption by only accessing the memory in the activated bank. The dynamic power consumption is reduced by 40% compared with the state-of-the-art FPGA-based CAMs.

Abstract: A substrate integrated waveguide fed antenna includes an electric dipole arrangement, a parasitic patch arrangement operably coupled with the electric dipole arrangement, and a feed structure. The feed structure includes a substrate integrated waveguide operably coupled with the electric dipole arrangement for exciting the electric dipole arrangement. A slotted conductive surface with a slot is arranged between the electric dipole arrangement and the feed structure for operably coupling the feed structure with the electric dipole arrangement.

Abstract: An active common mode filter is configured to be positioned between a power supply and a switching converter-device/load for reducing common mode noise. The active common mode filter includes an active capacitor that has a sensing stage including one or more sensing capacitors, an amplifying stage including a common collector amplifier for mitigating an input voltage divider effect coupled to a common emitter amplifier for providing high gain, and an injection stage including one or more injection capacitors. Depending on the required attenuation in different applications, a multistage active common mode filter may be formed with a necessary number of stages, each stage including an active capacitor and an inductor.

Abstract: A fluidic apparatus for detection of a chemical substance, a biosensor, and a method of fabricating the fluidic apparatus. The fluidic apparatus includes a fluidic structure arranged to receive a sample containing a target substance, and a trapping structure, in fluid communication with the fluidic structure and arranged to immobilize the target substance in a detection region, wherein the detection region of the trapping structure is arranged to alter a physical characteristic of an incident light signal which represents a concentration of the target substance contained in the sample.