47results about How to "Improving pulse performance" patented technology

A laser material processing system and method are provided. A further aspect of the present invention employs a laser for micromachining. In another aspect of the present invention, the system uses a hollow waveguide. In another aspect of the present invention, a laser beam pulse is given broad bandwidth for workpiece modification.

Process and device for reducing an ignition voltage of power pulses in plasmas operated in a pulsed manner with long pulse-off times. The process includes generating a power pulsed plasma at a pulse duty factor, the pulse duty factor being a ratio of pulse-on time to pulse-off time, and at least before the beginning of the pulse-on time of the power pulses, producing charge carriers using an additional plasma discharge at a lower power than that of the power pulses. The device includes a vacuum chamber including at least one pump system, an arrangement for producing plasma, the arrangement including at least one anode and at least one cathode, an energy source connected to the cathode and the anode which can be pulsed in the frequency range of between approximately 10 Hz to approximately 1 MHZ, and a mechanism for one of producing an additional plasma discharge.

The invention discloses a method and a device for removing space debris. The method is to apply electromagnetic force to the space debris running in the original orbit; the size and / or direction of the speed of the space debris change under the action of the electromagnetic force; ; The perigee height of the space debris at least in the new orbit is lower than the perigee height of the space debris in the original orbit; the space debris in the new orbit will eventually fall into the earth's atmosphere under the action of atmospheric drag. The device includes a satellite carrying platform; the satellite carrying platform is provided with an electric field device or a magnetic field device or a combination of the electric field device and the magnetic field device for removing space debris. The present invention does not require high precision for space debris position detection, can effectively remove tiny space debris, can fully utilize solar energy to generate electricity, saves energy, and has the beneficial effects of simple structure, low manufacturing cost and better pulse effect.

The invention discloses a water discharging device, which comprises a body. A first water discharging channel and a second water discharging channel are formed in the body; water discharging holes aredistributed in a water discharging face plate of the body; the first water discharging channel and the second water discharging channel are connected with the water discharging holes, and the angle formed between the water discharging direction of the first water discharging channel and the water discharging direction of the second water discharging channel is 1-179 degrees; and the first water discharging channel is a constant water discharging channel, and the second water discharging channel is an intermittent water discharging channel. According to the water discharging device, by dynamically changing the water discharging proportion of the two water discharging channels, collected and synthetized sprays are dynamically changed.

The invention discloses timed-release preparation consisting of a core tablet and a coating, which is characterized in that the coating contains retarder of stearate,. The invention also discloses a method for preparing the timed-release preparation; the coating of the timed-release preparation can be suppressed through direct powder sintering or wet granulation. The timed-release preparation of the invention can prohibit the rapid release of the preparation, obviously prolong the time delay and maintain comparatively better pulse effect. The wet granulation used for suppressing the coating adopted by the preparation method of the invention can reduce the consumption of framework material and decrease the viscosity during the granulation process so that the method is convenient for the granulation.

The invention relates to a broadband tunable optical parametric chirped pulse amplification system based on soliton self-frequency shift. The stretched soliton pulse laser generated by a pulse laser is transmitted as a seed signal to an all-fiber chirped pulse composed of a stretcher, an amplifier and a compressor. In the amplification system, the ultrashort pulse laser is output to the fiber frequency shift system composed of two different types of nonlinear fiber cascaded structures. Output to BaGa 2 GeSe 6 The crystal structure is connected with a laser source for matching the phase of the tunable ultrashort pulse laser, and the mid-infrared ultrashort laser with broadband tunable output is output through the crystal. The invention can effectively suppress the generation of supercontinuum laser in the fiber laser system and the high-energy laser system, and greatly improves the energy conversion efficiency of the seed signal in the optical parametric chirped pulse amplification system.

The invention relates to the technical field of radio long wave communication technology, and specifically relates to an extremely-ultra low frequency channel atmosphere noise suppression method based on variance median filtering. The extremely-ultra low frequency channel atmosphere noise suppression method based on variance median filtering includes the steps: constructing a multi-reference magnetic vector sensing system, synchronously receiving extremely-ultra low frequency signals through multi channels, and obtaining a magnetic induction output sampling point matrix X; according to the channel sampling point sequence, grouping X, estimating the variance of each group, and obtaining the variance matrix D; based on a large number decision criterion, performing pulse detection and two-stage adaptive median filtering on D; according to output of the second stage median filtering and input of the first stage median filtering, performing sequence reconstruction, and obtaining an output matrix Y; and performing power frequency harmonic interference and remaining atmosphere noise suppression on Y. As the extremely-ultra low frequency channel atmosphere noise suppression method based on variance median filtering taking the variance of the sampling point group as input of the adaptive median filter, the impulsiveness is improved. As the extremely-ultra low frequency channel atmosphere noise suppression method based on variance median filtering determines the pulse state of each element of the variance matrix based on the large number decision criterion, the pulse detection accuracy is improved and the defect that the performance is low when the median filtering is in the local high density pulse noise condition in the traditional method.

The invention provides a positive pulse generator. The positive pulse generator provided by the present invention includes a casing, a solenoid valve assembly, a pressure transmission assembly, a support guide assembly and a pulse conversion assembly. Arranged in sequence, the shell and the pressure transmission assembly are connected through a support guide assembly, the solenoid valve assembly includes a first solenoid valve, and the first solenoid valve is used to drive some parts in the pressure transmission assembly to move, so that the pressure fluid in the pressure transmission assembly The pulse conversion component is driven to generate pulses; the pulse conversion component includes a first pulse conversion component and a second pulse conversion component, the first pulse conversion component is connected with the pressure transmission component, the second pulse conversion component is located in the first pulse conversion component, and the second The pulse conversion component is in sliding fit with the first pulse conversion component. The positive pulse generator provided by the invention has higher stability.