Abstract: The invention provides a MEMS speaker including a substrate enclosing a cavity, a cantilever beam at least partially suspended above the cavity, a piezoelectric actuator away from the cavity, a polymer layer away from the cavity and attached to the cantilever beam and the piezoelectric actuator for completely covering the cantilever beam, the piezoelectric actuator and the cavity, and a piezoelectric composite vibration structure formed by the polymer layer. The cantilever beam includes a first section fixed to the substrate, a second section extending from the first section to the cavity and suspended above the cavity, and a third section extending from the second section away from the first section, an end of the third section away from the second section being suspended; and the piezoelectric actuator is only fixed with the third section.

Abstract: An antenna system and an electronic device are provided. The antenna system includes an antenna, a sensor, and a wireless radio frequency module. The sensor is electrically connected to the processor. The wireless radio frequency module is electrically connected to the antenna and the processor. The sensor generates and transmits a sensing signal to the processor according to a change of a proximity distance between an object and the antenna. The processor dynamically adjusts an output power of the wireless radio frequency module according to a sensing signal.

Abstract: A computerized method of transforming an interactive graphical user interface according to machine learning includes generating a selectable user interface element corresponding to a persona. In response to a user selecting the user interface element, data structures related to the persona are extracted from a first data store. The data structures are transformed into a set of input variables at a data processing module and loaded at a model execution module. The model execution module generates a first output variable based on the set of input variables. An analysis module generates a second output variable based on the first input variable. The graphical user interface displays a first message, a second message, or a third message in response to conditions being met for the second output variable.

Abstract: A copy of files of a primary storage system are stored at a secondary storage system. The metadata associated with the copy of the files of the primary storage system stored at the secondary storage system are analyzed to determine at least a portion of a hierarchical storage tier management plan for the primary storage system including by identifying one or more files to be migrated from a first tier of storage of the primary storage system to a different storage tier. An implementation of at least a portion of the hierarchical storage tier management plan is initiated.

Abstract: A substrate is manufactured by drilling a chip containing groove in a composite inner layer circuit structure, having a component connecting end of a circuit layer protruding from a mounting side wall in the chip containing groove, mounting a chip component in the chip containing groove, and connecting the surface bonding pad to the component connecting end. The chip component in the present invention penetrates at least two circuit layers, and the surface bonding pad is bonded to the component connecting end of the circuit layer directly, reducing the occupied area of the chip component in each one of the circuit layers, and increasing the area for circuit disposing and the possible amount of chip components that may be mounted in the substrate.

Abstract: The present disclosure discloses a MEMS speaker including a housing with a receiving space; a MEMS speaker chip with an inner cavity, accommodated in the receiving space and connected with the housing, the MEMS speaker chip dividing the receiving space into a first cavity and a second cavity communicating with the inner cavity; a sound hole communicating with the first cavity or the second cavity; and a damping mesh connected to the housing and covering the sound hole; wherein sounds emitted by the MEMS speaker chip transmit outward through the sound hole and the damping mesh. Compared with the related art, MEMS speaker disclosed by the present disclosure has a better reliability.

Abstract: The present disclosure discloses a MEMS speaker including a substrate with a cavity and a sounding assembly connected with the substrate, the substrate comprising an outer surface away from the cavity and connected with the sounding assembly, a top surface opposite to the outer surface and a side surface respectively connected with the outer surface and the top surface; a printed circuit board with a through hole and connected with the outer surface of the substrate; a first shell connected with the top surface of the substrate; and a damping mesh covering the through hole and connected with the printed circuit board; wherein sounds emitted by the sounding assembly transmit outward through the through hole and the damping mesh. Compared with the related art, MEMS speaker disclosed by the present disclosure has a better reliability.

Abstract: A ramp buffer circuit includes an input device having an input coupled to receive a ramp signal. A bias current source is coupled to an output of the input device. The input device and the bias current source are coupled between a power line and ground. An assist current source is coupled between the output of the input device and ground. The assist current source is configured to conduct an assist current from the output of the input device to ground only during a ramp event generated in the ramp signal.

Abstract: The invention discloses a charging state analysis method of a electric vehicle based on electrical characteristic sequence analysis. The method includes following steps: step S1, obtaining voltage sampling data and current sampling data of the electric vehicle during charging; step S2, setting a time interval, so as to divide the voltage sample data and the current sampling data obtained in step S1 into multiple data sets; step S3, calculating an electrical characteristic vector of each time interval; step S4. adding the calculation results of Step S3 to a temperature sensing value T, and generate an electrical characteristic sequence of whole charging cycle; step S5, inputting the electrical characteristic sequence of the electric vehicle into a trained Time Recurrent Neural Network (TRNN) in sequence to obtain corresponding results; if the result is 1, it means normal; if the result is 0, it means abnormal.

Abstract: A switch driver circuit includes a plurality of pullup transistors. The plurality of pullup transistors includes a first pullup transistor coupled between a voltage supply and a first output node. A plurality of pulldown transistors includes a first pulldown transistor coupled between the first output node and a ground node. A slope control circuit is coupled to the ground node. A plurality of global connection switches includes a first global connection switch coupled between the first output node and the slope control circuit.

Abstract: The invention discloses a piezoelectric speaker, including a substrate with a cavity therethrough a supporting structure covering the cavity a first drive structure stacked on the supporting structure, including alternately stacked first electrode layers and first piezoelectric layers a transmission structure stacked on the first drive structure, and a separation slot penetrating the supporting structure and the first drive structure to separate the first drive structure into a first piezoelectric driving part and a second piezoelectric driving part. A rigidity of the transmission structure is less than or equal to a rigidity of the first drive structure, and the rigidity of the first drive structure is less than or equal to a rigidity of the supporting structure. Compared with the prior art, the sound pressure level generated at the same moment is higher.

Abstract: A MEMS speaker includes a substrate, a vibration sounding portion and a baffle plate with a through hole. The baffle plate, the substrate and the vibration sounding portion form a sounding inner cavity, and a volume of the sounding inner cavity can adjust a resonant frequency of the sounding inner cavity, so that the resonance frequency of the sounding inner cavity resonate with a preset frequency of the MEMS speaker. A speaker assembly structure further provided includes a speaker, a fixing portion, and a baffle plate, the speaker and the baffle plate together enclose and form a sounding inner cavity, the fixing portion and the speaker are fixedly connected together and form a sealing structure. A sound pressure level of the MEMS speaker and the speaker assembly structure is high and harmonic distortion of the MEMS speaker and the speaker assembly structure is small.

Abstract: A sound production device includes a substrate having a cavity and a plurality of cantilever diaphragms fixed on the substrate. Each of the plurality of the cantilever diaphragms includes a fixed end fixed on the substrate and a free end extending from the fixed end to a position suspended above the cavity. The free end includes a first surface and a second surface oppositely arranged. The free end and the substrate or other free ends are spaced to form a gap. The sound production device further includes a first dielectric elastomer actuator, a second dielectric elastomer actuator, and a flexible connector. The sound production device of the present disclosures adopts dielectric elastomer actuators on both of the upper and lower sides of the cantilever diaphragms to together act on the cantilever diaphragms, thereby improving the linearity of the sound production device.

Abstract: An optical sensing device is provided. The optical sensing device includes a substrate, a housing, a light receiver, and an optical structure. The housing is disposed on an upper surface of the substrate, and the housing and the substrate collectively define a cavity. The light receiver is disposed in the cavity, and the housing surrounds the light receiver. The optical structure is disposed on an upper surface of the light receiver, and the optical structure includes a plurality of concave portions and a plurality of convex portions. The concave portions and the convex portions are alternately arranged to form an array, and a light transmittance of the concave portions is greater than a light transmittance of the convex portions.

Abstract: Disclosed are a system and method for detecting a vulnerability of an Internet of Things in Power Systems (IOTIPS) protocol based on fuzz testing. The system includes: a protocol configuration module configured to configure a protocol to be detected and a data frame of the protocol to be detected; a sample generation module configured to: after loading the protocol and the data frame configured by the protocol configuration module, configure a mutation strategy based on the loaded protocol, and generate a test sample based on the configured mutation strategy; and an execution monitoring module configured to transfer the test sample generated by the sample generation module to a device to be detected for testing, perform link management and test execution, store a test result, and generate a detection report.

Abstract: The present disclosure is directed to protocells or nanoparticles, which are optionally coated with a lipid bilayer, which can be used for targeting bone tissue for the delivery of bioactive agents useful in the treatment and/or diagnosis of bone cancer, often metastatic bone cancer which often occurs secondary to a primary cancer such as prostate cancer, breast cancer, lung cancer and ovarian cancer, among numerous others. These protocells or nanoparticles target bone cancer especially metastatic bone cancer with bioactive agents including anticancer agents and/or diagnostic agents for purposes of treating, diagnosing and/or monitoring the therapy of the bone cancer. Osteotropic protocells or nanoparticles, pharmaceutical compositions comprising a population of osteotropic protocells or nanoparticles and methods of diagnosing, treating and/or monitoring therapy of bone cancer are representative aspects.

Abstract: A magnetoresistive sensor and a manufacturing method thereof are provided. The method includes: forming an initial reference layer in an annular shape, wherein the initial reference layer includes an anti-ferromagnetic layer and a ferromagnetic layer; performing a heat treatment on the initial reference layer, wherein the ferromagnetic layer is magnetized to have a magnetization direction oriented along a vortex path during a heating step of the heat treatment, and an exchange bias oriented along the vortex path is induced at an interface of the anti-ferromagnetic layer and the ferromagnetic layer during a cooling step of the heat treatment; patterning the initial reference layer to form separated reference layers, wherein the reference layers are respectively formed in a annular sector shape, and the reference layers are arranged along the vortex path; forming spacer layers and free layers to form magnetoresistive devices; routing the magnetoresistive devices to form the magnetoresistive sensor.

Abstract: A packaging method includes steps of: forming first and second wiring layers electrically connected to each other on two opposite surfaces of a substrate; then configuring mother substrate interconnecting bumps on the first wiring layer and along perimeter of a daughter substrate unit, and then cutting along the perimeter of the daughter substrate unit to expose lateral faces of the mother substrate interconnecting bumps and configuring solder materials thereon; then configuring first and second chips on the first and the second wiring layers to form electrical interconnection between the two chips. A package structure enables interconnecting two chips through one single daughter substrate unit with its wiring layers directly connecting with lateral face contacts of the mother carrier substrate through the mother substrate interconnecting bumps.

Abstract: Metadata associated with content stored in a corresponding primary storage system is received receiving from each secondary storage cluster of a plurality of different secondary storage clusters included in different storage domains. The metadata received from the plurality of different secondary storage clusters is stored and indexed together. A unified metadata search interface is provided for stored data of the corresponding primary storage systems and the plurality of different secondary storage clusters of the different storage domains.