Abstract: Systems for, and methods of, detecting an attack on an optical communication channel are presented. The techniques can include sending, from a sender to a receiver, and over the optical communication channel, an optical signal, where the optical signal includes a classical optical signal representing first information and a quantum optical signal representing second information. The techniques can include detecting, by the receiver, third information from at least a portion of the quantum optical signal and sending, by the receiver to the sender, the third information. The techniques can include determining, by the sender, an indication of an attack on the optical communication channel based on at least a portion of the second information and the third information. The techniques can include triggering an alarm based on the determining.

Abstract: A device capable of automatically igniting or heating a cigarette includes a heat source system, a control system, and the openable and closeable top cover. The heat source system includes the electric heating chamber and the igniter. The igniter includes the electric heating element. The electric heating chamber includes at least one pair of light passing holes of the electric heating chamber. The control system includes the control circuit board, the mechanical switch, the mode switching switch, the infrared light source, the light sensing switch, and the device main circuit switch. The mechanical switch controls the top cover to be opened or closed and controls the device main circuit switch to be turned on or off. The mode switching switch is used for switching between an operation of the igniter and an operation of the electric heating chamber.

Abstract: A method of detecting eavesdropping, i.e. a physical layer attack, on an optical communications channel. The method comprises sending a first, classical message over an optical channel by encoding the message onto an optical carrier using a classical communications technique and sending a second, quantum message over the optical channel using a quantum cryptographic technique, e.g. a Continuous Variable Quantum Key Distribution (CV-QCD) technique; and detecting eavesdropping of the classical message on the optical channel by detecting the eavesdropping of the quantum message. In implementations the classical and quantum signals may be substantially indistinguishable to hinder an adversary from eavesdropping on the first signal without influence the second signal.

Abstract: A device capable of automatically igniting or heating a cigarette includes a heat source system, a control system, and the openable and closeable top cover. The heat source system includes the electric heating chamber and the igniter. The igniter includes the electric heating element. The electric heating chamber includes at least one pair of light passing holes of the electric heating chamber. The control system includes the control circuit board, the mechanical switch, the mode switching switch, the infrared light source, the light sensing switch, and the device main circuit switch. The mechanical switch controls the top cover to be opened or closed and controls the device main circuit switch to be turned on or off. The mode switching switch is used for switching between an operation of the igniter and an operation of the electric heating chamber.

Abstract: The invention provides a power control method and a power control system for a wind generating set. The method comprises: acquiring an actual torque TN and a preset torque TM of the wind generating set; and judging whether a first PID controller and a second PID controller of the wind generating set need to be simultaneously operated according to the actual torque TN and the preset torque TM, and if so, simultaneously operating the first PID controller and the second PID controller. According to the power control method and the power control system for the wind generating set, by judging whether the first PID controller and the second PID controller of the wind generating set need to be simultaneously operated in real time, flicker of the wind generating set can be reduced, and the wind generating set can work in a state as close to an optimal state as possible.