Abstract: The present invention provides a method for determining hydrogen sulfide (H2S) by headspace single-drop liquid phase microextraction and intelligent device colorimetry, which comprises: taking a silver-gold core-shell triangular nanosheet (Ag@Au TNS) as a nanodetection probe, in combination with an analysis method of headspace single-drop microextraction (HS-SDME), specifically extracting H2S volatilized from a sample to be detected by the nanodetection probe, and detecting H2S in the extracted sample with the help of the photographing function of an intelligent device and a color picking software. Compared with the prior art, the present invention adopts intelligent device colorimetry, with the limit of detection of about 65 nM and the linear range of 0.1-100 ?M, and the established method can be applied to the determination of H2S in actual samples such as egg white, milk and other opaque samples, and has the advantages of few procedures, simple operation, high detection efficiency and the like.

Abstract: A liquid chromatography method for simultaneously detecting multiple microRNAs based on a duplex-specific nuclease (DSN) cyclic amplification technology comprises the following steps: designing a fluorophore-modified single-stranded DNA probe according to a target microRNA to be detected and loading the probe onto a surface of a streptavidin-coated magnetic bead (MB) to serve as a detection probe; adding a target microRNA sample to be detected and DSN to the detection probe, fully mixing the same, and incubating the mixture; after the incubation, completely removing the magnetic bead and the unreacted DNA probe to obtain a separated solution; and injecting the separated solution into a high-performance liquid chromatography system for separation and quantification.

Abstract: The present invention provides a method for determining hydrogen sulfide (H2S) by headspace single-drop liquid phase microextraction and intelligent device colorimetry, which comprises: taking a silver-gold core-shell triangular nanosheet (Ag@Au TNS) as a nanodetection probe, in combination with an analysis method of headspace single-drop microextraction (HS-SDME), specifically extracting H2S volatilized from a sample to be detected by the nanodetection probe, and detecting H2S in the extracted sample with the help of the photographing function of an intelligent device and a color picking software. Compared with the prior art, the present invention adopts intelligent device colorimetry, with the limit of detection of about 65 nM and the linear range of 0.1-100 ?M, and the established method can be applied to the determination of H2S in actual samples such as egg white, milk and other opaque samples, and has the advantages of few procedures, simple operation, high detection efficiency and the like.

Abstract: A wake up system for electronic device includes a detecting circuit, an amplifier circuit, a switch circuit, and a south bridge chip. The detecting circuit detects an ambient temperature change as a result of the physical proximity of a user, converts the temperature change to a weak voltage signal, and amplifies the voltage signal for the first time. The amplifier circuit receives the amplified voltage signal and amplifies the voltage signal for the second time. The switch circuit receives the voltage signal that is amplified for the second time, and outputs a wake up signal when the voltage signal amplified for the second time is greater than a turn-on voltage. The south bridge chip receives the wake up signal, and wakes up the electronic device accordingly.

Abstract: A framework for forming an electronic display includes a primary electronic device, at least one coupling electronic device, and at least one secondary electronic device. The primary electronic device includes a system on a chip electronically coupled to a display screen of the primary electronic device. The at least one coupling electronic and the at least one secondary electronic device each includes an integrated circuit and a corresponding display screen. Each electronic device includes at least one connector configured to electronically couple to the connector of another electronic device. The system on a chip of the primary electronic device controls the display screen of each of the electronic devices to display a portion of the electronic display.

Abstract: A prompt circuit in a drinking cup includes a processor, temperature sensing and weight sensing units, and a prompt unit. The temperature sensing unit displays to a user the temperature of the liquid. The weight sensing unit detects a weight of liquid in the cup, and transmits the weight to the processor. The prompt unit includes a communication unit and a speaker unit. When any change of the weight of liquid in the cup within a first preset time is less than a preset value, the processor outputs a first control signal, to control the speaker unit to output an alarm. When the weight of liquid in the cup in unchanged for a preset time period after the speaker unit has output the alarm, the processor outputs a second control signal to the communication unit and the communication unit outputs a reminding message to a user.

Abstract: A framework for forming an electronic display includes a primary electronic device, at least one coupling electronic device, and at least one secondary electronic device. The primary electronic device includes a system on a chip electronically coupled to a display screen of the primary electronic device. The at least one coupling electronic and the at least one secondary electronic device each includes an integrated circuit and a corresponding display screen. Each electronic device includes at least one connector configured to electronically couple to the connector of another electronic device. The system on a chip of the primary electronic device controls the display screen of each of the electronic devices to display a portion of the electronic display.

Abstract: An alarm circuit applied in an electronic device includes an audio interface, an audio processor, a speaker, and a control unit. A first terminal of the control unit is coupled to the audio interface, to receive a first control signal or a second control signal. A second terminal of the control unit receives an alarm on/off signal. A third terminal of the control unit is coupled to the audio processor. When the second terminal of the control unit receives the alarm on signal, and the first terminal of control unit receives the first control signal meanwhile, the alarm on signal is transmitted to the alarm processor through the third terminal of the control unit, and the audio processor outputs the alarm signal through the speaker unit, to warn the user the mobile phone is being stolen immediately.

Abstract: An infrared detecting switch for a surveillance camera includes a detector, an amplifier circuit, and a switch circuit. The detector can detect infrared radiation emitted by a person and output a voltage signal. The amplifier circuit can receive the voltage signal and amplify the voltage signal. The switch circuit can receive the voltage signal and supply power to the surveillance camera.

Abstract: A prompt circuit in a drinking cup includes a processor, temperature sensing and weight sensing units, and a prompt unit. The temperature sensing unit displays to a user the temperature of the liquid. The weight sensing unit detects a weight of liquid in the cup, and transmits the weight to the processor. The prompt unit includes a communication unit and a speaker unit. When any change of the weight of liquid in the cup within a first preset time is less than a preset value, the processor outputs a first control signal, to control the speaker unit to output an alarm. When the weight of liquid in the cup in unchanged for a preset time period after the speaker unit has output the alarm, the processor outputs a second control signal to the communication unit and the communication unit outputs a reminding message to a user.

Abstract: An alarm circuit applied in an electronic device includes an audio interface, an audio processor, a speaker, and a control unit. A first terminal of the control unit is coupled to the audio interface, to receive a first control signal or a second control signal. A second terminal of the control unit receives an alarm on/off signal. A third terminal of the control unit is coupled to the audio processor. When the second terminal of the control unit receives the alarm on signal, and the first terminal of control unit receives the first control signal meanwhile, the alarm on signal is transmitted to the alarm processor through the third terminal of the control unit, and the audio processor outputs the alarm signal through the speaker unit, to warn the user the mobile phone is being stolen immediately.

Abstract: A voltage adjusting apparatus for an electronic device includes an input output control unit, a voltage dividing module, a switching module, and a voltage converting unit. The input output control unit outputs different voltage level control signals according to power requirements of the electronic device. The voltage dividing module includes at least a first resistor and a second resistor. The switching module receives the control signals, and selectively connects the at least first resistor or the second resistor in the voltage dividing module according to the different voltage level control signals. The voltage converting unit receives a first direct current (DC) voltage, and converts the first DC voltage to a feedback voltage. The voltage converting unit outputs a working voltage to the electronic device according to the feedback voltage and the at least first resistor or the second resistor connected in the voltage dividing module.

Abstract: A wake up system for electronic device includes a detecting circuit, an amplifier circuit, a switch circuit, and a south bridge chip. The detecting circuit detects an ambient temperature change as a result of the physical proximity of a user, converts the temperature change to a weak voltage signal, and amplifies the voltage signal for the first time. The amplifier circuit receives the amplified voltage signal and amplifies the voltage signal for the second time. The switch circuit receives the voltage signal that is amplified for the second time, and outputs a wake up signal when the voltage signal amplified for the second time is greater than a turn-on voltage. The south bridge chip receives the wake up signal, and wakes up the electronic device accordingly.

Abstract: A fan control system and method is configured to adjust the speed of a fan. When the fan is employed to dissipate heat generated by a computer, a temperature sensor is used to output temperature regarding a computer, and the system then adjusts the speed of the fan according to the temperature automatically. When the fan is used to cool a user, an input value is input by a user. The system then adjusts the speed of the fan according to an input value, and the speed of the fan can be adjusted manually in this situation.

Abstract: In a method for managing communication signals using an electronic device, a communications service provider of the electronic device is recognized according to an international mobile subscriber identity of the electronic device. Information of multiple neighboring base stations are obtained according to a frequency band of the communications service provider, and strength of the communication signals and addresses of the multiple neighboring base stations are obtained to display on a display device of the electronic device. One of the communication signals received from the multiple neighboring base stations is selected as a communication signal of the electronic device.

Abstract: A cover control method for a portable computer is disclosed. The method includes: receiving a controlling signal from a portable electronic device when the Bluetooth pairing between the portable computer and the portable electronic device is successfully; controlling a cover of the portable computer to rotate relative to a base of the portable computer in response to the controlling signal and controlling the portable computer to perform a predetermined operation; detecting a rotation angel during the rotation process of the cover; determining whether the rotation angel of the cover is equal to a predetermined angle, and controlling the cover to stop rotating if the rotation angel of the cover is equal to a predetermined angle.

Abstract: An identity is identified by an electronic device. The electronic device receives a connection request from a remote device and controls a remote device to capture an image using the remote device. The electronic device accepts the connection request and authorizes the remote device to access the electronic device upon the condition that the captured image matches a predetermined image stored in the electronic device.