Abstract: This application disclose a slot negotiation method for a fine-grain service in a FlexE. A sending apparatus may send the N requests to a receiving apparatus. The N requests initiates full slots negotiation of the fine-grain service. The N requests carry full sub-slot information of a sub-slot occupied by the fine-grain service, and the full sub-slot information indicates all sub-slots occupied by the fine-grain service. The receiving apparatus and the sending apparatus may perform negotiation based on the N requests and full slots of the fine-grain service. Therefore, fine-grain slots of the sending apparatus and the receiving apparatus are consistent, and a problem of inconsistent fine-grain slots of the sending apparatus and the receiving apparatus that may exist due to use of an incremental negotiation manner is avoided.

Abstract: This application relates to a slot negotiation method and a device. The method includes: A transmitter sends a first FlexE overhead frame to a receiver, to request active/standby calendar switching. When the receiver is in a restart state, the receiver does not respond to the received first FlexE overhead frame. In addition, the RX sends a routine update second FlexE overhead frame to the transmitter. Determining that the second FlexE overhead frame is not a response to the first FlexE overhead frame, the transmitter sends a third FlexE overhead frame to request active/standby calendar switching again. According to the method in this application, incorrect calendar switching on the transmitter side caused by a mistaken response of the receiver can be avoided. This reduces the likelihood of a service interruption caused by the existing slot negotiation mechanism.

Abstract: A port mode adaptation method includes a network device determining a status of a port on the network device. The method includes the network device setting a mode of the port to an Ethernet interface mode if the status of the port satisfies a first condition. In this way, when the network device identifies the mode of the port on the network device as the FlexE interface mode, and there is no link at the FlexE shim of the port, the network device may determine that a mode used by a port interconnected with the port is not a FlexE interface mode. In this case, the network device may adaptively set the mode of the port to the Ethernet interface mode, to ensure that the port on the network device can use a same mode as another port interconnected with the port.

Abstract: A telescopic slide rail support pulley structure includes a first rail provided with multiple mounting holes and a first rolling carriage, a second rail include notch, a positioning hole and a second rolling carriage, a support pulley assembly provided with an upper roller, a lower roller, a support holder and a connecting portion, and a third rail. The connecting portion of the support pulley assembly is mounted to the notch of the second rail. The support pulley assembly also has an upper roller groove and a lower roller groove. The upper roller is arranged in the upper roller groove. The lower roller is arranged in the lower roller groove. The third rail is connected to the second rail through the second rolling carriage. The second rail is connected to the first rail through the first rolling carriage.

Abstract: Provided are methods for efficient and optimal feature extraction, which can include identifying observations that satisfy a predetermined configuration of metrics. Some methods described also include extracting feature values of a respective metric from the identified observations and determining parameters for feature extraction based on the feature values extracted from the identified observations and a respective label of the identified observations. Systems and computer program products are also provided.

Abstract: A telescopic slide rail support pulley structure includes a first rail provided with multiple mounting holes and a first rolling carriage, a second rail include notch, a positioning hole and a second rolling carriage, a support pulley assembly provided with an upper roller, a lower roller, a support holder and a connecting portion, and a third rail. The connecting portion of the support pulley assembly is mounted to the notch of the second rail. The support pulley assembly also has an upper roller groove and a lower roller groove. The upper roller is arranged in the upper roller groove. The lower roller is arranged in the lower roller groove. The third rail is connected to the second rail through the second rolling carriage. The second rail is connected to the first rail through the first rolling carriage.

Abstract: This application relates to a slot negotiation method and a device. The method includes: A transmitter sends a first FlexE overhead frame to a receiver, to request active/standby calendar switching. When the receiver is in a restart state, the receiver does not respond to the received first FlexE overhead frame. In addition, the RX sends a routine update second FlexE overhead frame to the transmitter. Determining that the second FlexE overhead frame is not a response to the first FlexE overhead frame, the transmitter sends a third FlexE overhead frame to request active/standby calendar switching again. According to the method in this application, incorrect calendar switching on the transmitter side caused by a mistaken response of the receiver can be avoided. This reduces the likelihood of a service interruption caused by the existing slot negotiation mechanism.

Abstract: A port mode adaptation method includes a network device determining a status of a port on the network device. The method includes the network device setting a mode of the port to an Ethernet interface mode if the status of the port satisfies a first condition. In this way, when the network device identifies the mode of the port on the network device as the FlexE interface mode, and there is no link at the FlexE shim of the port, the network device may determine that a mode used by a port interconnected with the port is not a FlexE interface mode. In this case, the network device may adaptively set the mode of the port to the Ethernet interface mode, to ensure that the port on the network device can use a same mode as another port interconnected with the port.

Abstract: A method is implemented by a network device acting as a switch in a data plane of a software defined networking (SDN) network. The switch is communicatively coupled to a controller in a control plane of the SDN network, where the controller manages packet processing functionality of the switch. The method to provide data storage resource sharing information to the controller so that the controller can manage data storage resource utilization of the switch. The method includes determining which tables stored in the switch share a data storage resource of the switch and transmitting data storage resource sharing information to the controller, where the data storage resource sharing information includes an indication of the tables that share the data storage resource.

Abstract: A data processing method, includes receiving a data flow; generating a triplet set according to the data flow, where each triplet in the set includes three items, the first item is a first element in the data flow, the second item includes a first time point at which the first element appears in the data flow and a first quantity of times that corresponds to the first time point, and the third item includes a second time point at which the first element appears in the data flow and a second quantity of times that corresponds to the second time point; and performing data processing on the data flow according to the triplet set. In the embodiments of the present application, the triplet set may be generated based on the data flow.

Abstract: Embodiments of the disclosure generally relate to determination of resource utilization in SDN. An SDN controller sends a query to an application layer. The query is as to utilization of a resource to be used in a network infrastructure, and the resource does not include a bandwidth resource. The prediction is then determined at the application layer based on raw utilization information in response to the query. Then, the SDN controller receives the prediction from the application layer.

Abstract: A method is implemented by a network device acting as a switch in a data plane of a software defined net-working (SDN) network. The switch is communicatively coupled to a controller in a control plane of the SDN network, where the controller manages packet processing functionality of the switch. The method to provide data storage resource sharing information to the controller so that the controller can manage data storage resource utilization of the switch. The method includes determining which tables stored in the switch share a data storage resource of the switch and transmitting data storage resource sharing information to the controller, where the data storage resource sharing information includes an indication of the tables that share the data storage resource.

Abstract: A data processing method, includes receiving a data flow; generating a triplet set according to the data flow, where each triplet in the set includes three items, the first item is a first element in the data flow, the second item includes a first time point at which the first element appears in the data flow and a first quantity of times that corresponds to the first time point, and the third item includes a second time point at which the first element appears in the data flow and a second quantity of times that corresponds to the second time point; and performing data processing on the data flow according to the triplet set. In the embodiments of the present application, the triplet set may be generated based on the data flow.

Abstract: Embodiments of the disclosure generally relate to determination of resource utilization in SDN. An SDN controller sends a query to an application layer. The query is as to utilization of a resource to be used in a network infrastructure, and the resource does not include a bandwidth resource. The prediction is then determined at the application layer based on raw utilization information in response to the query. Then, the SDN controller receives the prediction from the application layer.

Abstract: A method for compressing flow data, including: generating multiple line segments according to flow data and a predefined maximum error that are acquired; obtaining a target piecewise linear function according to the multiple line segments, where the target piecewise linear function includes multiple linear functions, and an intersection set of value ranges of independent variables of every two linear functions among the multiple linear functions includes a maximum of one value; and outputting a reference data point according to the target piecewise linear function, where the reference data point includes a point of continuity and a point of discontinuity of the target piecewise linear function. In this way, a maximum error, a target piecewise linear function is further determined according to the multiple line segments, and a point of continuity and a point of discontinuity of the target piecewise linear function are used to represent compressed flow data.

Abstract: Systems are provided for processing of complex join queries. The systems receive a join query directed towards a set of tables. The systems randomly select an attribute from an index associated with a table from the set of tables. The selected attribute is selected based upon a query applied to the table. The systems identify a number of possible pathways from the selected attribute to a set of attributes in another table within the set of tables. Each pathway is representative of a possible join between the selected attribute and the attributes within the set of attributes. The systems then identify a terminating attribute within the set of tables. A contribution of the terminating attribute to a result is weighted by a number of possible pathways identified between an initial set of attributes and the terminating attribute.

Abstract: A method for compressing flow data, including: generating multiple line segments according to flow data and a predefined maximum error that are acquired; obtaining a target piecewise linear function according to the multiple line segments, where the target piecewise linear function includes multiple linear functions, and an intersection set of value ranges of independent variables of every two linear functions among the multiple linear functions includes a maximum of one value; and outputting a reference data point according to the target piecewise linear function, where the reference data point includes a point of continuity and a point of discontinuity of the target piecewise linear function. In this way, a maximum error, a target piecewise linear function is further determined according to the multiple line segments, and a point of continuity and a point of discontinuity of the target piecewise linear function are used to represent compressed flow data.

Abstract: A method for compressing flow data, including: constructing multiple line segments according to flow data and a predefined maximum error that are acquired; obtaining a target piecewise linear function according to the multiple line segments, where the target piecewise linear function includes multiple linear functions, and an intersection set of value ranges of independent variables of every two linear functions among the multiple linear functions includes a maximum of one value; and outputting a reference data point according to the target piecewise linear function, where the reference data point includes a point of continuity and a point of discontinuity of the target piecewise linear function. In this way, a maximum error, a target piecewise linear function is further determined according to the multiple line segments, and a point of continuity and a point of discontinuity of the target piecewise linear function are used to represent compressed flow data.

Abstract: A method for compressing flow data, including: constructing multiple line segments according to flow data and a predefined maximum error that are acquired; obtaining a target piecewise linear function according to the multiple line segments, where the target piecewise linear function includes multiple linear functions, and an intersection set of value ranges of independent variables of every two linear functions among the multiple linear functions includes a maximum of one value; and outputting a reference data point according to the target piecewise linear function, where the reference data point includes a point of continuity and a point of discontinuity of the target piecewise linear function. In this way, a maximum error, a target piecewise linear function is further determined according to the multiple line segments, and a point of continuity and a point of discontinuity of the target piecewise linear function are used to represent compressed flow data.

Abstract: A multi-well plate for use in Raman spectroscopy includes a substrate and a metallic layer. The substrate defines a plurality of wells in a top surface thereof. The metallic layer is disposed on a bottom wall of each of the wells in the substrate. The substrate may comprise a material selected from the group consisting of glass and plastic. Each of the wells in the substrate has a diameter of about 0.02 to 10 mm and a depth of about 0.