Abstract: The present disclosure provides a sound production unit. The sound production unit includes a frame with a receiving space encircled by a frame side wall, a magnetic circuit system and a vibrating system received in the receiving space, and a front cover matched with the frame, wherein the vibrating system comprises a diaphragm fixedly connected to the frame, the front cover comprises a bottom surface connected with the diaphragm and a front cover outside surface bent and extended from the edge of the bottom surface, the front cover outside surface is a metal surface, and the sound production unit further comprises an insulating film stuck on the front cover outside surface.

Abstract: A piezoelectric acoustic resonator with an adjustable temperature compensation capability is disclosed. The piezoelectric acoustic resonator includes: a piezoelectric acoustic reflection structure, a first electrode, a second electrode, a piezoelectric layer between the first electrode and the second electrode, and a temperature compensation layer; wherein the temperature compensation layer is a single-layer temperature compensation layer formed of SixOy material, or a composite temperature compensation layer formed by stacking material with a positive temperature coefficient of sound velocity and material with a negative temperature coefficient of sound velocity; and the temperature compensation layer is configured to: perform reverse compensation for a temperature frequency shift caused by the first electrode, the piezoelectric layer and the second electrode in the piezoelectric acoustic resonator; wherein x:y is not equal to 1:2.

Abstract: A molecular probe includes a detector molecule specific to a target molecule, and at least one label linked covalently or non-covalently to the detector molecule. The label includes a catalyst for generating electrons and/or mediators from a solution. The catalyst includes a nanomaterial, an enzyme, a metal, and/or a metal complex. The mediators can accumulate in the solution for a period of time. The detector molecule and the target molecule interact with each other by a protein based or nucleotide sequence based interaction. The mediators participate in a chemical reaction that generates a signal that may be a change in optical, electromagnetic, thermodynamic or mechanical properties. Generation efficiency of the mediators is enhanced by providing an energy to the solution. The molecular probe may be used with a molecular detection assay performed on a surface. A method for assaying the target molecule using the molecular probe is also provided.

Abstract: A multi-functional folding cart including a folding cart body with a cloth pocket for containing articles. One end of the folding cart body is movably connected with a handle. A transverse rod and a fixing rod are arranged on the front and rear ends of a bottom of the folding cart body. Two wheels are located on the front end and two wheels are located on the rear end of the bottom of the folding cart body. Each of the wheels is provided with a trundle fixing frame. A stopping part and a rotating shaft are arranged on the top of the trundle fixing frame on the rear end of the bottom of the folding cart body. The rotating shaft connects the trundle fixing frame with the fixing rod. The trundle fixing frame can rotate around the rotating shaft to perform folding.

Abstract: A reaction system comprises at least one additive and at least one reaction base-plane for augmenting chemical reaction, photoelectrochemical reaction, photochemical reaction or electrochemical reaction. The reaction system further comprises at least one reaction substrate carried out to the chemical reaction, the photoelectrochemical reaction, the photochemical reaction or the electrochemical reaction with the at least one additive and the at least one reaction base-plane. The at least one additive is a kind of reaction enhancer added in the reaction system to improve, augment or accumulate the effeteness of at least one reaction result.

Abstract: An electro-acoustic device is provided, including a frame; a magnetic circuit received in the frame and including a lower plate fixed on a bottom of the frame and a magnet attached on the lower plate; a vibration system received in the frame and including a vibrating diaphragm attached to a top of the frame; a cavity formed cooperatively by the lower plate, the frame and the vibrating diaphragm; a leak hole provided between the frame and the lower plate for communicating with outside of the electro-acoustic device; and a damper attached to the lower plate and located inside of the electro-acoustic device for covering the leak hole internally.

Abstract: A method for determining a treatment response of cells is provided with steps of providing a un-treated first sample and a treated second sample; applying an electric signal to the first sample and the second sample; obtaining a first motion parameter of the first sample and a second motion parameter of the second sample in the electric signal, respectively; and comparing the first motion parameter and the second motion parameter to determine whether there is a difference. The difference represents that the treatment response exists.

Abstract: An electro-acoustic device is disclosed. The electro-acoustic device includes a frame; a magnetic circuit received in the frame and including a lower plate fixed on a bottom of the frame and a magnet attached on the lower plate; a vibration system received in the frame and including a vibrating diaphragm attached to a top of the frame; a cavity formed cooperatively by the lower plate, the frame and the vibrating diaphragm; a leak hole provided between the frame and the lower plate for communicating with outside of the electro-acoustic device; and a damper attached to the lower plate and located inside of the electro-acoustic device for covering the leak hole internally.

Abstract: An acoustic resonator device includes a composite first electrode on a substrate, a piezoelectric layer on the composite electrode, and a second electrode on the piezoelectric layer. The first electrode includes a buried temperature compensating layer having a positive temperature coefficient. The piezoelectric layer has a negative temperature coefficient, and thus the positive temperature coefficient of the temperature compensating layer offsets at least a portion of the negative temperature coefficient of the piezoelectric layer.

Abstract: In one aspect of the invention, an acoustic device has a first coupled resonator filter (CRF) and a second CRF electrically coupled to one another in series. Each CRF has an input port, an output port, a bottom film bulk acoustic resonator (FBAR), an acoustic decoupler formed on the bottom FBAR, and a top FBAR formed on the acoustic decoupler. Each FBAR has a bottom electrode, a piezoelectric layer formed on the bottom electrode, and a top electrode formed on the piezoelectric layer. The decoupling layer capacitance arising between the two electrodes enclosing the acoustic decoupler in a CRF is configured to achieve targeted filter response. A compensating capacitance is introduced to improve the amplitude and phase imbalance performance of an unbalanced to balanced CRF by eliminating the existence of asymmetric port-to-ground or feedback capacitance at the balanced output port produced by the decoupling layer capacitance.

Abstract: An obversely and reversely pluggable connector structure, includes a multi-plate circuit board, first transmission conductor set and second transmission conductor set each, a plurality of first soldering faces and second soldering faces, a plurality of first conduction portions and second conduction portions, a plurality of first through holes and second through hole portions, a first shielding shell and second shielding shell each, first capacitor unit and second capacitor unit each at least, allowing the first transmission conductor set and second transmission conductor set different in length to clamp a connector to the circuit board together through the above components, and components for soldering, conducting, reducing noise are configured correspondingly to each transmission conductor set, thereby achieving the reduction of the volume upon a connector assembly, and having the effect of decreasing EMI (Electromagnetic interference) and RFI (radio frequency interference).

Abstract: An obversely and reversely pluggable connector structure, includes a multi-plate circuit board, first transmission conductor set and second transmission conductor set each, a plurality of first soldering faces and second soldering faces, a plurality of first conduction portions and second conduction portions, a plurality of first through holes and second through hole portions, a first shielding shell and second shielding shell each, first capacitor unit and second capacitor unit each at least, allowing the first transmission conductor set and second transmission conductor set different in length to clamp a connector to the circuit board together through the above components, and components for soldering, conducting, reducing noise are configured correspondingly to each transmission conductor set, thereby achieving the reduction of the volume upon a connector assembly, and having the effect of decreasing EMI (Electromagnetic interference) and RFI (radio frequency interference).

Abstract: A low-insertion-loss piezoelectric acoustic wave band-pass filter and a realization method thereof are disclosed. The realization method includes: using one first kind of piezoelectric acoustic wave resonator to constitute a series branch; using one second kind of piezoelectric acoustic wave resonator to constitute a parallel branch with a ground terminal; connecting any end of the series branch with a non-ground terminal of the parallel branch to form an acoustic wave band-pass filter unit; and cascading a plurality of acoustic wave band-pass filter units; wherein an impedance value at a series resonant frequency of the first kind of piezoelectric acoustic wave resonator is less than that of the second kind of piezoelectric acoustic wave resonator; and an impedance value at a parallel resonant frequency of the first kind of piezoelectric acoustic wave resonators is less than that of the second kind of piezoelectric acoustic wave resonator.

Abstract: A wind charger set on a circuit board for powering a button cell held by a holder set on the circuit board. The wind charger includes a bracket attached to the holder, a wind turbine fixed on the bracket and a charge circuit. The charge circuit is set on the circuit board. The wind turbine transfers airflow created by a heat-dissipating device set on the circuit board into electricity for powering the charge circuit, which charges the button cell.

Abstract: A piezoelectric acoustic resonator with an adjustable temperature compensation capability is disclosed. The piezoelectric acoustic resonator includes: a piezoelectric acoustic reflection structure, a first electrode, a second electrode, a piezoelectric layer between the first electrode and the second electrode, and a temperature compensation layer; wherein the temperature compensation layer is a single-layer temperature compensation layer formed of SixOy material, or a composite temperature compensation layer formed by stacking material with a positive temperature coefficient of sound velocity and material with a negative temperature coefficient of sound velocity; and the temperature compensation layer is configured to: perform reverse compensation for a temperature frequency shift caused by the first electrode, the piezoelectric layer and the second electrode in the piezoelectric acoustic resonator; wherein x:y is not equal to 1:2.

Abstract: A mounting apparatus for a solid state disk includes a bracket and a latching module. The bracket includes a connecting pole and a supporting member mounted to the connecting pole. The latching module is installed to the supporting member, and comprises a latching member. The supporting member includes a position pole mounted to the connecting pole and a supporting bar perpendicularly extending out from the position pole. The position pole defines a latching slot facing the supporting bar for positioning an end of the solid state disk. The supporting bar defines a guiding slot facing the latching slot for receiving a side of the solid state disk. The latching member is to latch onto the solid state disk.

Abstract: A memory card includes a control chip, a buffer, a NAND gate, and an inverter. The memory card has a first surface and a second surface opposite to the first surface. A first group of conductive pins is located on the first surface, and connected to the buffer through a first channel. A second group of conductive pins is located on the second surface, and connected to the buffer through a second channel. An order of pins of the first group of conductive pins located on the first surface from left to right is the same as an order of pins of the second group of conductive pins located on the second. The buffer is electrically connected to the control chip. Data can be transmitted between the first group of conductive pins or the second group of conductive pins and the control chip through the buffer.

Abstract: A wind charger set on a circuit board for powering a button cell held by a holder set on the circuit board. The wind charger includes a bracket attached to the holder, a wind turbine fixed on the bracket and a charge circuit. The charge circuit is set on the circuit board. The wind turbine transfers airflow created by a heat-dissipating device set on the circuit board into electricity for powering the charge circuit, which charges the button cell.

Abstract: In one aspect of the present invention, an integrated wafer level package includes a first wafer and a second wafer spaced apart to define a first gap therebetween, a first bulk acoustic wave (BAW) filter disposed on the first wafer and a second BAW filter disposed on the second wafer, where the second BAW filter faces directly the first BAW filter to define a second gap therebetween, a seal ring disposed between the first wafer and the second wafer in the first gap such that a seal is formed surrounding the first BAW filter and the second BAW filter and defining a cavity between the seal ring and the first BAW filter and the second BAW filter, and at least one external contact accessible externally to the wafer level package and electrically coupled to at least one of the first BAW filter and the second BAW filter.

Abstract: In one aspect of the invention, the acoustic wave resonator includes a resonator structure having a first electrode, a piezoelectric layer formed on the first electrode, and a second electrode formed on the piezoelectric layer, and a composite layered structure associated with the resonator structure such that the immunity of the acoustic wave resonator to environmental change and aging effects is improved, the trimming sensitivity is substantially minimized, and/or dispersion characteristics of the acoustic wave resonator is optimized.