75results about How to "Accuracy unchanged" patented technology

Embodiments of the invention provide a disk drive that is capable of determining the offset of a magnetic head position through simple and easy processing in a case where the shingle write method is adopted, and that is capable of increasing the accuracy. In one embodiment, a disk drive comprises: a recording medium including data tracks, each of which is formed with part of the data track being overwritten by an adjacent data track on the inner circumferential side or by an adjacent data track on the outer circumferential side; a head assembly including a write head for writing information to the recording medium, and a read head for reading out information from the recording medium; and a control device for controlling a position of the head assembly relative to the recording medium. Position-error detection signals whose phases differ from each other are repeatedly written to the recording medium in the track direction with written positions of the position-error detection signals being deviated from each other by a track pitch in the track width direction; and the control device controls a position of the head assembly on the basis of a burst signal read by the read head.

The invention relates to a device and method for controlling the power supply of light sources, preferably light emitting diodes (LED). The invention is characterized in that it allows the thermal management of LEDs without requiring the use of a programmable DC / DC converter, by systematically adjusting an automatic control value of the DC / DC converter used.

The invention relates to a method of measuring the real density of the powder using double density bottles, which including the following steps: 1) weighing the quality of the density bottle A and B with the mass of ma and mb accurately, filling the bottle with agent fluid and weighing the quality m1, m2, checking the dielectric fluid density Rho0 corresponding to the temperature, compute the volume of the two bottle va, vb; 2) filling the bottle B with the powder to be measured, weighing the quality m3, and m[sample]=m3-mb; then filling the agent fluid to the surface of the powder 4.8-5.2mm, putting it to the vacuum chamber and pumping to the critical boiling point, keeping 28-32 minutes until the air bubble in the powder space output completely; 3) filling the agent fluid to bottle A,B at the same time, measuring the quality of bottle A m4, bottle B m5; 4) computing the sample's mass density according to the following formula: rho[sample]=m[sample] / v[sample]=(m3-mb)(m4-ma) / [(m4-ma)vb-(m5-m3)va].

Embodiments of the present invention provide a coal gasification-to-synthesis gas desulfurization device and method, which relate to the technical field of gas desulfurization. A method for desulfurization from coal gasification to syngas, comprising: reacting coal gasification to syngas with a desulfurizer to remove sulfides in the syngas to obtain desulfurized syngas and a deactivated desulfurizer, wherein the desulfurizer is modified with phosphorus or boron. Desulfurizing agent, its effective components include zinc oxide and hydrogenation active components; the deactivated desulfurization agent is reacted with oxygen to generate zinc oxide, and the hydrogenation active components are oxidized to obtain an oxidative desulfurization agent; the oxidative desulfurization agent is contacted with desulfurized synthesis gas The hydrogen in the desulfurized synthesis gas is reduced by the oxidized hydrogenation active components to obtain a desulfurizing agent that restores the activity. The coal gasification to syngas desulfurization device includes: a fluidized bed desulfurization reactor, a fluidized bed reduction reactor and a fluidized bed oxidation reactor. The above-mentioned device and method can ensure sufficient desulfurization, and the desulfurization agent can be recycled and used in the desulfurization process, and the desulfurization precision and sulfur capacity can be basically unchanged.

The invention discloses a parallel network traffic anomaly detection method based on Spark and isolation forest. On the basis of the isolation forest algorithm, with the help of parallel processing technology Spark, computing resources are provided for the tree building process and abnormal evaluation process, and the iForest algorithm modeling process is realized. The parallelization and batch processing of anomaly evaluation can effectively improve the accuracy of anomaly detection and reduce the time complexity. At the same time, it also provides a new idea and theoretical method basis for network traffic anomaly detection.