Abstract: A digital commodity exchange method is implemented in an electronic device. The method includes receiving a digital commodity and exchanging conditions of the digital commodity, generating a first exchange contract of the digital commodity, storing the first exchange contract to a blockchain platform of the electronic device and broadcasting the first exchange contract on each node of the blockchain, searching a number of exchange contracts in the electronic device and identifying a second exchange contract that matches the exchange information in the first exchange contract, storing the first exchange contract and the second exchange contract in the form of a message queue in the electronic device, and transmitting the digital commodity of the first exchange contract and the digital commodity of the second exchange contract to the terminal device of the second exchange contract and the terminal device of the first exchange contract, respectively.

Abstract: A fire development situation prediction method includes collecting simulation data of a fire, establishing a neural network of an engineered deep learning model, training the neural network with the simulation data, determining whether an output value of the neural network is less than or equal to a preset error threshold value, stopping training of the neural network when the output value of the neural network is less than or equal to a preset error threshold value, recollecting the simulation data of the fire when the output value of the neural network is not less than or equal to a preset error threshold value, and evaluating the development situation of the fire according to the engineered deep learning model. The fire development situation prediction method is for predicting a development situation of a fire.

Abstract: A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.

Abstract: A risk managing device for monitoring and managing one or more areas at risk, includes an obtaining module, a setting module, an updating module, a calculating module, and a sorting module. The obtaining module obtains live inspection information of an area. The setting module sets a Severity, Occurrence, and Detection (SOD) score for each failure factor of each safety device. The updating module updates the SOD score of each failure factor of each safety device according to the live inspection information. The calculating module calculates a grey correlation degree of each safety device according to updated SOD score. The sorting module outputs a risk sorting list of the plurality of safety devices of the area according to the grey correlation degree of each safety device. A risk managing method is also provided.

Abstract: A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.

Abstract: A method for managing an intercom system includes obtaining a householder management authority of an intercom official account by an intercom indoor device and transferring the householder management authority to a first mobile terminal of a householder. An intercom request can be generated by an access control device through which a visitor or other is seeking entry, the intercom request being received by the first mobile terminal of the householder. A communication with the access control device can be established, and the access control device can be controlled to open or not open a door. An intercom system is also provided.

Abstract: In one embodiment, an apparatus includes a photoluminescent wavelength-shifting material configured to receive an input-light data signal comprising a first range of wavelengths, absorb at least a portion of the received input-light data signal, and produce an emitted-light data signal comprising a second range of wavelengths based on an upper-state lifetime of the photoluminescent wavelength-shifting material. The apparatus also includes a focusing element configured to receive at least a portion of the emitted-light data signal, concentrate the received portion of the emitted-light data signal, and produce a concentrated-light data signal. The apparatus further includes a photodetector configured to receive the concentrated-light data signal, and produce an electrical current corresponding to the concentrated-light data signal.

Abstract: Systems and methods described herein include methods and systems for controlling bias voltage provided to an optical modulating device. The optical modulating device is biased at a bias point that is different from a null point of the device such that an offset to the received optical power due to limited extinction ratio is reduced.

Abstract: In one embodiment, an apparatus includes a wavelength-shifting element configured to receive an input-light signal. The wavelength-shifting element includes a wavelength-shifting material configured to absorb at least a portion of the received input-light signal and produce an emitted-light signal from the absorbed portion of the received input-light signal. The apparatus also includes a plasmonic grating comprising a plurality of plasmonic-grating elements configured to receive at least a portion of the emitted-light signal and direct the received portion of the emitted-light signal onto a photodetector. The apparatus further includes the photodetector configured to receive the directed portion of the emitted-light signal and produce an electrical current corresponding to the directed portion of the emitted-light signal.

Abstract: A system includes information acquisition apparatus, one or more user terminals and a server communicating with both. The information acquisition apparatus is positioned at a scene for acquired information. The user terminal includes a community establishing module and an inviting module. The community establishing module can be commanded to recognize a social group and set characteristics of the social group. The invitation module can invite other users to join the social group in response to a second user command. The server includes an information analyzing module and an information publishing module. The information analyzing module analyzes the acquired information and determines whether acquired information or part is or is not associated with a characteristic of the social group. The information publishing module can publish to the group acquired information which is determined to be associated with a characteristic of the social group.

Abstract: A system includes a first software module, a storage module and a second software module. The first software module receives first data and analyzes the first data to obtain first processed data corresponding to the first data. The storage module stores the first processed data. The second software module receives second data and obtains values in first processed data corresponding to parameters of the second software module, and analyzes the obtained values and the second data to obtain second processed data.

Abstract: A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.

Abstract: Optical communication systems and methods using coherently combined optical beams are disclosed. A representative system includes a first data source for sending first data at a first frequency of a first optical beam to a first aperture, and at a second frequency of a second optical beam to a second aperture. The system further includes a second data source for sending second data at a third frequency of a third optical beam to the first aperture, and at a fourth frequency of a fourth optical beam to the second aperture. The system also includes a first interleaver of the first aperture configured to interleave the first data at the first frequency and the second data at the third frequency; and a second interleaver of the second aperture configured to interleave the first data at the second frequency and the second data at fourth frequency.

Abstract: Systems and methods described herein include methods and systems for controlling bias voltage provided to an optical modulating device. The optical modulating device is biased at a bias point that is different from a null point of the device such that an offset to the received optical power due to limited extinction ratio is reduced.

Abstract: A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.

Abstract: A risk managing device for monitoring and managing one or more areas at risk, includes an obtaining module, a setting module, an updating module, a calculating module, and a sorting module. The obtaining module obtains live inspection information of an area. The setting module sets a Severity, Occurrence, and Detection (SOD) score for each failure factor of each safety device. The updating module updates the SOD score of each failure factor of each safety device according to the live inspection information. The calculating module calculates a grey correlation degree of each safety device according to updated SOD score. The sorting module outputs a risk sorting list of the plurality of safety devices of the area according to the grey correlation degree of each safety device. A risk managing method is also provided.

Abstract: Systems and methods described herein include methods and systems for controlling bias voltage provided to an optical modulating device. The optical modulating device is biased at a bias point that is different from a null point of the device such that an offset to the received optical power due to limited extinction ratio is reduced.

Abstract: A system for recording, analyzing, and managing persons who enter and leave one or more areas includes a plurality of modules. A setting module sets an entrance guard authorization to each entering-exiting person (E-E person) of an area. An obtaining module obtains entrance guard entrance-exit information and video record information of a first E-E person. An access control module determines whether the first E-E person is authorized according to card swiping information and image recognition information and opens a current entrance guard when the first E-E person is authorized. An information processing module generates an entrance-exit list of the first E-E person according to the entrance guard entrance-exit information and the video record information. A regional population management method is also provided.

Abstract: A voice-monitoring system includes a monitoring center, at least one monitoring device, and a control module. The monitoring center is configured to respond to voice instructions. The control module is configured to receive the voice instructions from staff in monitoring center, convert the voice instructions to voice letters, and determine whether the voice instructions are legal. When the voice instructions are determined to be legal in terms of a recognized task and in terms of the authority of a voiceprint-recognized monitoring staff member, the control module controls the monitoring center to execute operations according to the control instructions, thus the voice-monitoring system can provide control of emergency operations when emergency happens. A voice-monitoring method is also provided.

Abstract: A system includes a first software module, a storage module and a second software module. The first software module receives first data and analyzes the first data to obtain first processed data corresponding to the first data. The storage module stores the first processed data. The second software module receives second data and obtains values in first processed data corresponding to parameters of the second software module, and analyzes the obtained values and the second data to obtain second processed data.