The present disclosure relates to a fan system and a fan driving method. The fan driving method includes the following steps: transmitting a first control signal to a first fan and a second fan by a processor; determining whether a first control frequency of the first control signal is within a first frequency band and a second frequency band, wherein the first frequency band and the second frequency band are different; when the first control frequency is within the first frequency band, adjusting a first rotation speed of the first fan according to the first control signal; and when the first control frequency is within the second frequency band, adjusting a second rotation speed of the second fan according to the first control signal.

The present disclosure relates to a fan system and a fan driving method. The fan driving method includes the following steps: transmitting a first control signal to a first fan and a second fan by a processor; determining whether a first control frequency of the first control signal is within a first frequency band and a second frequency band, wherein the first frequency band and the second frequency band are different; when the first control frequency is within the first frequency band, adjusting a first rotation speed of the first fan according to the first control signal; and when the first control frequency is within the second frequency band, adjusting a second rotation speed of the second fan according to the first control signal.

A wireless controller includes a handle portion to be held in one or both hands. The wireless controller also includes a gyroscope to output rotation information indicative of rotation of the handle about a steering axis, an accelerometer to output acceleration information, and a magnetometer to output magnetic bearing information. The wireless controller also includes a communication subsystem to wirelessly transmit sensor data to a computing device. The sensor data represents one or more of the rotation information, the acceleration information, and the magnetic bearing information such that the acceleration information is useable to attenuate gyroscopic drift when the handle has a first orientation and the magnetic bearing information is useable to attenuate gyroscopic drift when the handle has a second orientation.

Disclosed are various embodiments of systems and methods related to measuring one or more ambient conditions within a confined environment. A telemetry monitoring system comprises a magnetic resonator disposed within a confined environment. The magnetic resonator may be passively energized by an interrogating antenna situated outside the confined environment. Resonant signal responses emitted from the magnetic resonator may be analyzed to determine one or more ambient conditions within the confined environment.

A control signal receiver of an equipment control device receives a control signal for equipment transmitted by a remote control terminal from a communication device via the Internet. A remote control authorization receiver receives, from a resident of a home, an authorization with respect to the control signal received by the control signal receiver. When the authorization receiver receives an authorization from the resident of the home, an equipment controller controls the equipment on the basis of the received control signal.

An information notification apparatus includes: a communication unit which receives first device information and first history information from a first device and then transmits notification; an information collection database which holds, based on the first device information received by the communication unit, the received first history information in association with the held first device information; a determination unit which determines need to transmit notification of the first device when information included in the first history information held in the information collection database satisfies a condition; a display device designation unit which designates, based on destination information and the received first device information, a display device on which notification of the first device is to be displayed; and a generation unit which generates notification when the determination unit determines need to transmit the notification of the first device, wherein the communication unit transmits the generated notification to the designated display device.

A method and apparatus for downhole data transmission. The method comprising monitoring electrical impedance properties of a downhole formation by applying an electrical signal between a first portion and a second portion of a drill string that are electrically insulated from each other by an insulating portion, selecting a frequency for transmitting data by electromagnetic telemetry based at least in part on the monitored electrical impedance and transmitting the data by encoding the data in a waveform having the selected frequency and applying the waveform between the first portion and the second portion of the drill string.

A method and apparatus for downhole data transmission. The method comprising monitoring electrical impedance properties of a downhole formation by applying an electrical signal between a first portion and a second portion of a drill string that are electrically insulated from each other by an insulating portion, selecting a frequency for transmitting data by electromagnetic telemetry based at least in part on the monitored electrical impedance and transmitting the data by encoding the data in a waveform having the selected frequency and applying the waveform between the first portion and the second portion of the drill string.

Handheld electronic devices are provided that have remote control functionality and gesture recognition features. The handheld electronic device may have remote control functionality in addition to cellular telephone, music player, or handheld computer functionality. The handheld electronic devices may have a touch sensitive display screen. The handheld electronic devices may recognize gestures performed by a user on the touch sensitive display screen. The handheld electronic devices may generate remote control signals from gestures that the handheld electronic device may recognize. A media system may receive the remote control signals and may take appropriate action. The touch sensitive display screen may be used to present the user with information about the media system such as the current volume.

An electromagnetic remote control and control method thereof; when rotating a second rotary disc (20), the repulsive force between a first magnetic piece (30) on the second rotary disc (20) and a second magnetic piece (40) on a first rotary disc (10) is increased; when detecting increase in force on the second magnetic piece (40), transmitting a corresponding control instruction to a controlled device. The controlled terminal can be controlled by rotating the second rotary disc (20) without providing additional function keys, thus the electromagnetic remote control is small and easy to carry.