Abstract: Embodiments provide an ear pad having an annular structure. The ear pad includes an inner layer and an outer layer covering the inner layer. The inner layer and the outer layer are separate of annular structures and are separated by a first medium layer. The inner layer coats a second medium layer. Acoustic impedance of the first medium layer is different from acoustic impedance of the inner layer and the outer layer. The ear pad is configured to close a front cavity space between a housing and an ear of a user, thereby preventing sound leakage and reducing external noise entering the ear of the user. Various ear pad embodiments provide a double-layer structure including the inner layer and the outer layer separated by the first medium layer.

Abstract: Embodiments of this application disclose a noise reduction headset. A branch pipe is disposed in the headset to connect a sound cavity inside the headset and an external environment. The branch pipe has a low-pass filter function to filter out high-band noise entering the sound cavity from the external environment, so that impact on sound quality inside the sound cavity that is caused by noise in the external environment is reduced, thereby implementing passive noise reduction.

Abstract: Embodiments provide an ear pad having an annular structure. The ear pad includes an inner layer and an outer layer covering the inner layer. The inner layer and the outer layer are separate of annular structures and are separated by a first medium layer. The inner layer coats a second medium layer. Acoustic impedance of the first medium layer is different from acoustic impedance of the inner layer and the outer layer. The ear pad is configured to close a front cavity space between a housing and an ear of a user, thereby preventing sound leakage and reducing external noise entering the ear of the user. Various ear pad embodiments provide a double-layer structure including the inner layer and the outer layer separated by the first medium layer.

Abstract: Embodiments of this application disclose a noise reduction headset. A branch pipe is disposed in the headset to connect a sound cavity inside the headset and an external environment. The branch pipe has a low-pass filter function to filter out high-band noise entering the sound cavity from the external environment, so that impact on sound quality inside the sound cavity that is caused by noise in the external environment is reduced, thereby implementing passive noise reduction.

Abstract: This application relates to an intelligent traffic cloud control system based central system so as to address the problems of the central system in the relevant art being overloaded, and operating at a low rate. An intelligent traffic cloud control system according to an embodiment of this application at least includes a central system, a plurality of control servers, and a plurality of field devices, wherein the central system is connected with the control servers over a network, and the field devices are connected with the control servers over IP address based broadband buses; and the central system is configured to collect data in one or more of the following data collecting modes: monitoring state data of the control servers in real time, inquiring about data from the control servers in non-real time, and subscribing to data from the control servers as needed.

Abstract: The invention relates to the field of controlling road traffic, and particularly to a method for coordinated control in an intelligent traffic cloud control system, and in the method, a central system can perform global coordinated control, or a control server can perform local coordinated control, and if the control server performs local coordinated control, then the control server can distribute a pertinent coordinated control strategy for a particular condition in a service area, thus alleviating the burden on the central system, and reducing the overall amount of data information to be transmitted in the intelligent traffic system, and also shortening the period of time for transmitting the data information so as to improve the efficiency of generating and enforcing the coordinated control strategy, and to address the problem of a traffic jam at a crossing effectively in a real-time manner.

Abstract: This application relates to an intelligent traffic cloud control system based central system so as to address the problems of the central system in the relevant art being overloaded, and operating at a low rate. An intelligent traffic cloud control system according to an embodiment of this application at least includes a central system, a plurality of control servers, and a plurality of field devices, wherein the central system is connected with the control servers over a network, and the field devices are connected with the control servers over IP address based broadband buses; and the central system is configured to collect data in one or more of the following data collecting modes: monitoring state data of the control servers in real time, inquiring about data from the control servers in non-real time, and subscribing to data from the control servers as needed.

Abstract: This application relates to the field of intelligent traffic technology, and particularly to an intelligent traffic cloud control server, so as to address the problem of a poor ability of the control server to manage and control the traffic. The control server according to an embodiment of this application includes: a first CPU configured to receive traffic data, which is provided by at least one of the plurality of field devices and transmitted by a second CPU, to store, analyze, and process the traffic data, and to generate the first control instruction; and the second CPU configured to receive the traffic data provided by the at least one of the plurality of field devices and to transmit the traffic data to the first CPU; and to receive the first control instruction generated by the first CPU, and to control and manage the field device according to the first control instruction.

Abstract: The invention relates to the field of controlling road traffic, and particularly to a method for coordinated control in an intelligent traffic cloud control system, and in the method, a central system can perform global coordinated control, or a control server can perform local coordinated control, and if the control server performs local coordinated control, then the control server can distribute a pertinent coordinated control strategy for a particular condition in a service area, thus alleviating the burden on the central system, and reducing the overall amount of data information to be transmitted in the intelligent traffic system, and also shortening the period of time for transmitting the data information so as to improve the efficiency of generating and enforcing the coordinated control strategy, and to address the problem of a traffic jam at a crossing effectively in a real-time manner.

Abstract: The invention relates to the field of controlling road traffic, and particularly to a method and equipment for processing information in an intelligent traffic cloud control system. In the method, a first node distributes subscription messages to control servers, the control servers return information acquired by IP-enabled field devices, and corresponding processing results to the first node upon determining that a preset condition indicated by the subscription messages is satisfied, and the first node generates a corresponding coordinated control strategy or local control strategy according to the returned information acquired by the IP-enabled field devices, and corresponding processing results.

Abstract: A method and system for controlling data flow are provided. The method includes: selecting optional reference data of a flow algorithm to generate configuration information; and performing traffic calculation based on the configuration information to determine hash distribution of the data flow to load balancing links. The flow algorithm is a HASH algorithm.

Abstract: A method and system for controlling data flow are provided. The method includes: selecting optional reference data of a flow algorithm to generate configuration information; and performing traffic calculation based on the configuration information to determine hash distribution of the data flow to load balancing links. The flow algorithm is a HASH algorithm.