8results about How to "Meet performance indicators" patented technology

This invention belongs to the field of information security technology, specifically relating to a robust FDI attack detection method for ship navigation systems. The invention constructs a linear discrete-time system model and designs an attack detector based on this model. The detector parameters are optimized using the linear matrix inequality method, and an adaptive detection threshold mechanism based on historical mean and standard deviation is designed. This mechanism can dynamically sense changes in system state, making the dynamic attack detection system asymptotically stable and meeting performance indicators.

The present invention relates to the field of wireless communication technology, and provides a gain-adjustable low-noise amplifier and radio frequency chip, including a common input switching module, a first amplifier module, a second amplifier module, a first output matching module, a second output matching module, a first control module and a second control module; the input end of the common input switching module is used to receive a radio frequency signal, and the output end of the common input switching module is used to switch the radio frequency signal to the first amplifier module or the second amplifier module according to the first control module or the second control module; the first amplifier module and the second amplifier module respectively amplify the radio frequency signal, and output it through the first output matching module and the second output matching module respectively; the first control module is used to control the on-off of the first amplifier module to the ground, and the second control module is used to control the on-off of the second amplifier module to the ground. The present invention can achieve good isolation and performance indicators between input ports.

The present invention relates to the field of wireless communication technology, and provides a common input low noise amplifier and radio frequency chip, including a common input port selection module, a first amplifier module, a second amplifier module, a first input switch module, a second input switch module, a first output matching module and a second output matching module; the input end of the common input port selection module is used to receive a control signal, and the output end of the common input port selection module is used to control the input end of the first amplifier module or the second amplifier module to select and output a signal; the input end of the first input switch module is used to access the first input signal, and the output end of the first input switch module is used to connect the input end of the first amplifier module; the input end of the second input switch module is used to connect the second input signal, and the output end of the second input switch module is used to connect the input end of the second amplifier module. The low noise amplifier of the present invention can improve radio frequency performance and performance indicators.

The invention provides a production method of a T-shaped alloy profile, which comprises the following steps: S1, selecting a titanium alloy square billet as a blank, and removing a surface oxide layer and impurities; s2, the blank is heated to the rolling temperature, and then a symmetrical T-shaped profile is obtained through continuous passing type rolling of a phi 950 tandem 13 continuous rolling unit; s3, the material is conveyed to an on-line tension straightening machine through a roller way by means of the residual temperature of the material after hot rolling, tension straightening is conducted, and then secondary straightening is conducted through a withdrawal and straightening machine; and S4, after the semi-finished product material is cooled, a band sawing machine conducts length fixed-length blanking, then water cutting is conducted for middle division in the length direction, and a plurality of profiles are obtained. According to the production method of the T-shaped alloy sectional material, the T-shaped sectional material is manufactured in a continuous passing type rolling mode through the phi 950 tandem 13 continuous rolling unit, a traditional extrusion mode is replaced, the sectional material is not prone to breakage during machining, the mechanical property of the sectional material is excellent, raw materials can be fully utilized, and the production cost is reduced. And the waste of materials is greatly reduced.

The invention relates to the technical field of road engineering asphalt pavement materials, in particular to a preparation method, a product and application of a polyethylene wax asphalt modifier. The preparation method of the polyethylene wax asphalt modifier comprises the following steps: uniformly mixing polyethylene particles and a cracking catalyst to obtain mixture particles; the mixture particles are fed into a double-screw extruder to be extruded, and micro-cracking liquid glue is obtained; and carrying out high-temperature and high-pressure reaction on the micro-cracked liquid glue to obtain the polyethylene waxy asphalt modifier. The cracking catalyst is prepared by loading nickel on expanded vermiculite powder. The polyethylene waxy asphalt modifier has the advantages that the asphalt viscosity is reduced, the asphalt is modified, the compatibility and storage stability between the asphalt and polyethylene are improved to a great extent, and compared with the common polyethylene cracking technology, the polyethylene waxy asphalt modifier has the advantages that a large amount of energy consumption can be reduced; and the recycling degree of the waste polyethylene plastic can be increased, energy conservation and environmental protection are achieved, and efficient utilization is achieved.

The invention relates to the technical field of automobile part structures, in particular to a rear suspension hub motor wheel edge integrated structure, an assembling method and an automobile. Comprising a rim, a hub motor, a rear suspension and a brake, and the rim is of a hollow annular structure; the hub motor is located on the inner side of the rim and comprises an outer rotor shell fixed to the end, away from the vehicle body, of the rim and a stator shell arranged on the outer rotor shell. One end, close to a vehicle body, of the stator shell is positioned on the axial inner side of a rim; the rear suspension comprises a joint head fixedly connected with the end, close to the vehicle body, of the stator shell. The brake comprises brake calipers fixedly connected with the joint head and a brake disc connected with one end, close to the automobile body, of the outer rotor shell. According to the rear suspension hub motor wheel edge integration structure, the hub motor is completely integrated in the rim, enough assembly space is reserved for the wheel edge, arrangement of a rear suspension and a pipeline is facilitated, meanwhile, a plurality of connectors are reserved, and assembly of the rear suspension and the pipeline is greatly facilitated.

The present invention relates to the field of wireless communication technology, and provides a low noise amplifier and a radio frequency chip, including a common port input selection module, a first amplifier module, a second amplifier module, a first input switch module, a second input switch module, a first output matching module, and a second output matching module; the input end of the common port input selection module is used to receive a radio frequency signal, and the output end of the common port input selection module is used to control the selective output of the first amplifier module and / or the second amplifier module to achieve different gain adjustment controls on the output signal; the first amplifier module and the second amplifier module are used to amplify the signal, and the first output matching module and the second output matching module are used to match the output; the first input switch module and the second input switch module are used to access the input signal. The low noise amplifier of the present invention can achieve good radio frequency performance and performance indicators.

The invention provides a high-strength and high-toughness particle-reinforced dual-phase magnesium-lithium alloy as well as a preparation process and application thereof. The high-strength and high-toughness particle-reinforced dual-phase magnesium-lithium alloy comprises the following components in percentage by weight: 6 to 10 percent of Li, 1 to 6 percent of Al, 1 to 6 percent of Zn, 0.2 to 1 percent of Gd, 0.1 to 1 percent of Y, 0.1 to 1 percent of Ca and 0.05 to 1 percent of ceramic particles. According to the magnesium-lithium alloy, micro and nano ceramic particles are added on the basis of rare earth and Ca refined grains, the solidification structure is refined, and the dislocation strengthening effect is improved; meanwhile, the composite deformation process parameters are optimized, the hard rare earth phase and the nanometer strengthening phase are regulated and controlled, the dislocation density and the texture strength are enhanced, the strength and plasticity of the double-phase magnesium-lithium alloy are greatly improved, and the performance indexes of structural parts in the military industry and the aerospace field can be met. The method is simple in preparation process, short in flow and suitable for industrial production.