Abstract: A gene chip includes a chip carrier, a plurality of DNA nanoballs assembled on the chip carrier, and a polymer film formed on the chip carrier and wrapping the DNA nanoballs. The polymer film includes at least one of a film of a positively charged polymer, a film of a positively charged polymer which is modified, a film of a zwitterionic polymer, and a composite polymer film. The composite polymer film is formed by a layer-by-layer self-assembly process of a positively charged polymer and a negatively charged polymer. The gene chip has good sequencing quality and different functions can be achieved by coating with different polymers, such as the chip surface rapidly drying out and surface non-specific adsorption. A method of preparing a gene chip is further disclosed.

Abstract: The present invention provides a working device, comprising a working portion and a grip portion. The working portion comprises a driving component and a working component driven by the driving component. The driving component comprises an electric motor and an electric motor housing. The electric motor housing comprises a housing body and a connecting portion located on a rear side of the housing body. At least one air intake hole is formed in the connecting portion, and is in communication with an inner cavity of the housing body. In the working device of the present invention, the driving component is provided with an air intake hole to allow air for cooling an electric motor to enter the interior of the driving component.

Abstract: A heat transmitting device is provided, including a main body and an integrating portion. The main body has at least one opening. The integrating portion is used to seal the opening, and has a first surface and a second surface opposite the first surface. A first welding pattern is formed on the first surface, a second welding pattern is formed on the second surface, and the position of the first welding pattern corresponds to that of the second welding pattern. The type of the first welding pattern and the type of the second welding pattern are asymmetric.

Abstract: A heat transmitting device is provided, including a main body and an integrating portion. The main body has at least one opening. The integrating portion is used to seal the opening, and has a first surface and a second surface opposite the first surface. A first welding pattern is formed on the first surface, a second welding pattern is formed on the second surface, and the position of the first welding pattern corresponds to that of the second welding pattern. The type of the first welding pattern and the type of the second welding pattern are asymmetric.

Abstract: The present invention provides a working device, comprising a working portion and a grip portion. The working portion comprises a driving component and a working component driven by the driving component. The driving component comprises an electric motor and an electric motor housing. The electric motor housing comprises a housing body and a connecting portion located on a rear side of the housing body. At least one air intake hole is formed in the connecting portion, and is in communication with an inner cavity of the housing body. In the working device of the present invention, the driving component is provided with an air intake hole to allow air for cooling an electric motor to enter the interior of the driving component.

Abstract: An antenna oscillator unit includes a radiator and a balun support. The radiator is fixed to the balun support and includes a plurality of low-frequency oscillator arms circumferentially distributed along the balun support. Each of the low-frequency oscillator arms includes two radiating sections connected to each other and a connecting section connecting the two radiating sections to form a closed loop. The two radiating sections are substantially perpendicular to each other. The antenna oscillator unit of some embodiments can avoid mutual coupling of signals from the antenna oscillator unit and an adjacent high-frequency oscillator and can improve the capability to radiate electromagnetic signals.

Abstract: An antenna oscillator unit includes a radiator and a balun support. The radiator is fixed to the balun support and includes a plurality of low-frequency oscillator arms circumferentially distributed along the balun support. Each of the low-frequency oscillator arms includes two radiating sections connected to each other and a connecting section connecting the two radiating sections to form a closed loop. The two radiating sections are substantially perpendicular to each other. The antenna oscillator unit of some embodiments can avoid mutual coupling of signals from the antenna oscillator unit and an adjacent high-frequency oscillator and can improve the capability to radiate electromagnetic signals.

Abstract: A heat transmitting device is provided, including a main body and an integrating portion. The main body has at least one opening. The integrating portion is used to seal the opening, and has a first surface and a second surface opposite the first surface. A first welding pattern is formed on the first surface, a second welding pattern is formed on the second surface, and the position of the first welding pattern corresponds to that of the second welding pattern. The type of the first welding pattern and the type of the second welding pattern are asymmetric.

Abstract: A device for detecting an interface voltage of a Universal Serial Bus (USB) interface. The device includes first and second voltage level indicators, and first and second control circuits. The first control circuit receives the interface voltage to generate a first control signal and drive the first voltage level indicator when the interface voltage level is less than a first voltage level. The second control circuit receives the interface voltage to generate a second control signal and drive the second voltage level indicator when the interface voltage level exceeds a second voltage level.

Abstract: A device for detecting an interface voltage of a Universal Serial Bus (USB) interface. The device includes first and second voltage level indicators, and first and second control circuits. The first control circuit receives the interface voltage to generate a first control signal and drive the first voltage level indicator when the interface voltage level is less than a first voltage level. The second control circuit receives the interface voltage to generate a second control signal and drive the second voltage level indicator when the interface voltage level exceeds a second voltage level.

Abstract: An exemplary power supply circuit includes a comparator and two MOSFET transistors connected in parallel. The comparator has a non-inverting terminal connected to a reference voltage. Both gates of the MOSFET transistors are connected to an output terminal of the comparator, both drains of the MOSFET transistors are connected to a power supply, both sources of the two MOSFET transistors are connected to an inverting terminal of the comparator and act as an output of the power supply circuit.

Abstract: A power supply system for providing main power and standby power to peripheral electronic devices in a computer, comprises an input signal coming from a CPU of the computer; a driving device for receiving the input signal and generating a driving signal; a first power switch device connected with a first main power source and a first standby power source; and a second power switch device connected with a second main power source and a second standby power source. When the driving signal is transmitted into the first power switch device and the second power switch device, the first power switch device outputs the first main power source or the first standby power source in response to the driving signal to one of the peripheral electronic devices, and the second power switch device outputs the second main power source or the second standby power source in response to the driving signal to another one of the peripheral electronic devices.