The invention discloses an expansion flame retardation type power cable. The power cable includes a preformed body (6). The preformed body (6) includes an insulating core body (1) and thermal expansion tires (5); the thermal expansion tires (5) are arranged in the insulating core body (1) at intervals; the insulating core body (1) includes at least two cable cores (2) and an insulation filling material (3), the cable cores (2) are disposed in central symmetry in the insulating filling material (3), the position between the insulating filling material (3) and the cable cores is provided with three V-shaped grooves (3.1) at intervals; the V-shaped grooves (3.1) are filled with the thermal expansion tires (5); and the thermal expansion tires (5) include thermal expansion micro balloons (11) and adhesive resin (12), and the initial temperature of the thermal expansion micro balloons (11) is from 180 DEG C to 220 DEG C. The power cable also includes a low melting point filling layer (7), awaveform carbon fiber cloth layer (8) and a fireproof sheath layer (10). The expansion flame retardation type power cable has a reasonable thermal expansion and thermal expansion guiding structure andhas a heat insulation barrier, and the reasonable thermal expansion and thermal expansion guiding structure and the heat insulation barrier have a synergistic effect to enable fire resistance properties to be greatly improved.

Expansion flame retardation type power cable

The embodiment of the invention discloses a method and a device for predicting network traffic peak The method comprises the following steps of collecting the network traffic data in the current data collection cycle; determining at least one probability distribution followed by the network traffic data; for each determined probability distribution, evaluating the parameters of the probability distribution; according to the probability distribution and the parameters of the probability distribution, determining a probability density function of the network traffic data; determining the probability density function which has the highest goodness of fit with the network traffic data; according to the probability density function with highest goodness of fit, predicting the network traffic flow in the next data collection cycle The method disclosed by the embodiment has the advantages that the probability of the network traffic data in the next data collection cycle can be described, and the predicting accuracy of the network traffic peak is improved

Method and device for predicting network traffic peak

The embodiment of the invention discloses an information technology system monitoring method and device. The method comprises the steps that the performance data of N monitoring periods are collected, wherein N is an integer which is not less than 1; a performance baseline is formed according to the performance data; monitoring data are collected and the corresponding monitoring time of the monitoring data is determined; and the baseline value corresponding to the monitoring time is extracted from the performance baseline; and the monitoring data and the baseline value are compared so as to form the monitoring result.

Information technology system monitoring method and device

The invention discloses a performance index monitoring method and device. The performance index monitoring method comprises the steps of acquiring historical performance data of a monitored performance index within a certain period, and storing the acquired historical performance data in a first data table; selecting corresponding-period historical performance data corresponding to current data of the monitored performance index from the first data table, and storing the corresponding-period historical performance data in a second data table; calculating an upper base line and a lower base line according to the historical performance data in the second data table; calculating corresponding upper tolerance and lower tolerance according to the upper base line, the lower base line and a pre-configured relative tolerance ratio; and giving an alarm if the current data of the monitored performance index is greater than the upper tolerance or less than the lower tolerance. The alarm condition is dynamically determined according to the historical performance data of the monitored performance index, and the alarm condition is not required to be manually determined or manually configured, so that the workload is reduced. In addition, the performance index monitoring method has a certain learning ability, thereby being capable of adapting to varied services, and meeting requirements of users.

Performance index monitoring method and device

The invention discloses a method for setting a fluctuation threshold range of data traffic. The method comprises the steps of carrying out classification on waveform types of current data according to historical data of the current data so as to acquire waveform type information, and setting a fluctuation threshold range of the current data according to the waveform type information and historical data traffic information. Meanwhile, the invention further discloses a data traffic monitoring method, a device for setting the fluctuation threshold range of the data traffic and a data traffic monitoring system.

Method and device for setting fluctuation threshold range of data traffic

The invention discloses a method and a system for monitoring flow in an MPLS-VPN (Multiple Protocol Label Switching-Virtual Private Network) and relates to the technical field of network information. The method for monitoring flow in the MPLS-VPN provided by the embodiment of the invention can automatically learn according to data, intelligently adjust a monitoring threshold and realize a flexible flow monitoring solution. The MPLS-VPN can be dynamically monitored through a base line, the manual configuration of the monitoring threshold by a network administrator can be reduced, and a software program can dynamically generate the monitoring threshold according to historical flow data. Not only can the labor input be greatly reduced, but also the flow monitoring of the MPLS-VPN can be more properly realized. The method and the system can be continuously improved and upgraded with service environments; since the new service environment and the network environment increasingly become complex and the situations of network environment change and network recombination become more and more, aiming at different service environments, the monitoring demand can be quickly satisfied.

Method and system for monitoring flow in MPLS-VPN (Multiple Protocol Label Switching-Virtual Private Network)

The utility model discloses a power equipment cabinet with convenient removal and heat dissipation function, including heat abstractor and mobile device, the fixed cooling liquid tank body that is provided with in left side in the internal chamber of cabinet, the upper portion and the lower part of the cooling liquid tank body are linked together through the circulating line, are provided with refrigerating plant and circulating pump on the circulating line, the internal portion of cooling liquid tank is equipped with cooling channel, and cooling channel's initiating terminal is connected with the air intake, cooling channel's end -to -end connection has cloth wind passageway, is provided with the draught fan on the cloth wind passageway, the lifter plate is fixed to be set up at the swivel nut lower extreme, and the downside of lifter plate is fixed and is equipped with a plurality of gyro wheels, the utility model discloses it is rational in infrastructure, utilize bevel gear's transmission, realize the cabinet body and stabilized the interconversion of state and dislocation state, through the processing of cooling down to the air, realized effectively having guaranteed power equipment's normal work to the cooling of the internal portion of cabinet, prevented the emergence of conflagration.

Power equipment cabinet with convenient removal and heat dissipation function

The utility model relates to a high temperature resistant silicon rubber fiber insulation sleeve pipe for the safety protection of urban electric power optical cable, this sleeve pipe include that the cross -section is annular glass fiber yarn layer, locates the carbon fiber cloth layer and the cladding of glass fiber yarn layer surface are in the outer silastic -layer of carbon fiber cloth layer, the silastic -layer is in adding flame retardant composite to silicon rubber, and it is compound to the glass fiber yarn layer to handle the butt fusion through the after cure again. The thickness on glass fiber yarn layer is 3mm, carbon fiber cloth layer's thickness is 2mm, the thickness of silastic -layer is 1mm. The utility model discloses a coat outside the fibre cloth layer structure of silastic -layer has increased high temperature resistant silicon rubber fiber insulation sleeve pipe's mechanical strength and high temperature resistance, plays good fire resistance, and the characteristics that the glass is fine, carbon is fine and silicon rubber matter is soft and stable make the sleeve pipe construction convenient, and the corrosion resistance that silicon rubber is good has increased life.

High temperature resistant silicon rubber fiber insulation sleeve pipe

The utility model discloses a network information exchanger which is arranged between an external network and an internal network The network information exchanger comprises an external network access component, an internal network access component, an external information processing component, a read-only information processing component, a storage component and a control component, the external network access component is connected with the external network, the internal network access component is connected with the internal network, the external information processing component is connected with the external network access component and the storage component respectively, and the read-only information processing component is connected with the internal network access component and a read-only interface of the storage component respectively; the control component is connected with the external network access component and the internal network access component respectively; under the control of the control component, external data of the external network is stored into the storage component via the external information processing component, and the read-only information processing component reads the external data from the read-only interface of the storage component to the internal network The external network and the internal network are isolated by adopting a physical isolation mode, and security of sensitive information is guaranteed

Network information exchanger

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Method and system for monitoring flow in MPLS-VPN (Multiple Protocol Label Switching-Virtual Private Network)

Power equipment cabinet with convenient removal and heat dissipation function

High temperature resistant silicon rubber fiber insulation sleeve pipe

Network information exchanger