30 results about "Path stability" patented technology

The invention provides aircraft route planning method and device on the basis of a pigeon colony algorithm and belongs to the technical field of unmanned aerial vehicle route planning and multi-attribute decision making. The aircraft route planning method includes the steps of: 1) firstly establishing a trace prediction model including uncertainty, and determining a to-be-optimized route in a specified region; 2) with the pigeon colony algorithm, performing iteration to obtain an optimized route through operations with a map and a compass and landmark operation, and finally outputting parameters of the acquired optimized route. Correspondingly, the invention provides an aircraft route planning device on the basis of pigeon colony algorithm, which includes: an acquirement module, a construction module, a determination module, an optimizing module and a memory module. The method and device can deduct and calculate the trace prediction model, so that a route acquired by the model has good stability and has robustness and availability; in addition, through the pigeon colony intelligent optimization method, a problem of complex continuous optimization is solved. The calculation and searching process has the characters of parallelism, availability and high robustness.

A Hardware-Embedded Delay Physical Unclonable Function (“HELP PUF”) leverages entropy by monitoring path stability and measuring path delays from core logic macros. Reliability and security enhancing techniques for the HELP PUF reduce bit flip errors during regeneration of the bitstring across environmental variations and improve cryptographic strength along with the corresponding difficulty of carrying out model building attacks. A voltage-based enrollment process screens unstable paths on normally synthesized (glitchy) functional units and reduces bit flip errors by carrying out enrollment at multiple supply voltages controlled using on-chip voltage regulators.

The invention discloses a method for realizing high-energy isochronism and working path stabilization in a circular accelerator. The method comprises the following steps that 1, according to injectionenergy, intermediate energy, lead-out energy and accelerator size range requirements, unit cycle structures of two forward magnets are adopted, and a circular accelerator integral structure meeting the isochronism requirement is designed; 2, between the two forward magnets of each cycle unit, reverse magnets with the same shape are inserted; 3, magnetic fields of the forward magnets and the reverse magnets are adjusted; and 4, spiral angles of the magnets are adjusted. The reverse magnets and the spiral angles are introduced in the circular accelerator, so that a working path of the accelerator in a high energy state is stabilized while the isochronism is achieved, the problem of integral resonance crossing caused by the unstable working path of a traditional circular accelerator is avoided, high-energy continuous beam flow can be led out in the accelerator, and the technical difficulty that the beam flow of the current circular accelerator difficultly reaches more than MWs is solved.

The invention discloses a database optimized storage method based on the industrial control field. The method comprises the following steps of: S1, reading return path data, storing the return path data related to the automatic control rate into a real-time return path automatic control rate acquisition table, and storing the return path data related to the stability rate into a real-time return path stability rate acquisition table; taking the return path data with same space attribute as the tree node data, obtaining and storing the real-time automatic control rate and the stability rate of the tree node according to the return path data in the acquisition tables; S2, while reading the next round of return path data, executing the step S1, and simultaneously executing a step S3; and S3, storing a time stamp in a historical return path acquisition table before storing the current return path data; determining a statistic cycle, accumulating the length of the time stamp, storing the return path data in the historical return path acquisition table into each table corresponding to the statistic cycle, and then, obtaining the historical automatic control rate and the stability rate of the tree node. The invention further discloses a corresponding database optimized query method. With the method provided by the invention, the data query efficiency in a local database with a huge data volume can be improved.

The invention relates to a catalyst for preparing propylene through propane catalytic dehydrogenation, which is a load type platinum-based catalyst and is characterized in that home-made mesoporous molecular sieves MCM-41 are used as carriers, metal Pt is used as an active ingredient, and metals Sn, Sn-Ce or Sn-Ce-Ca are used as auxiliary agents. In a preparation method, an isovolumetric continuous immersion method is adopted for preparation. The catalyst and the preparation method have the advantages that the isovolumetric continuous immersion method is adopted for preparing multi-component catalysts, wherein the content of any one component is easy to control, the prepared catalyst has higher specific surface area (700 to 900m<2> / g) and has high catalytic activity, the propane conversion rate is high, the propylene selectivity is good, the one-path stability is good, in addition, the service life is longer, the preparation method of the catalyst carriers is simple and feasible, the economic benefit is obvious, and good industrial development and application prospects are realized.

Adding guided light strip array high-power semiconductor laser device (High-Power Laser Diode Bar , LD for short) reshaping method: (1) by calculating the product of the optical fiber core radius and half of the angular aperture, and the optical parameter product of the LD light beam in the direction of quick, slow axis, ascertain the number of times which the LD light beam needed to reshaping, to make reshaping implement with high reflecting efficiency; (2) adopting the quick, slow axis collimation lens array to collimates in two direction of the quick, slow axis alignment of LD, getting thestrip collimation facula; (3) assembling reshaping implement , realizes reshaping of the light beam; (4) assembling the focusing lens and optical fiber, adjusting the optical fiber to the right location , making the outputting power of LD maximal;(5)entrancing the guided light in proper location of the reshaping implement, adjusting the guided light to appropriate location, makes the luminous power of the guided light which is output from the optical fiber maximum. The light path design is reasonable and compact, has not changed the light path of LD, has avoided leading into new scattering and reflecting loss, guarantee light path stability of LD.

The invention relates to a real-time evaluation method for service path stability and belongs to the information excavation technology field. The method comprises steps that, a to-be-calculated service path is firstly selected, influence of the quantity of connection nodes on the service path exerted on the service path stability is further calculated; influence of processing capability of all the connection nodes exerted on the service path stability is calculated, influence of association paths of all the connection nodes exerted on the service path is calculated; stability of the service path is calculated. According to the method, the quantity of the connection nodes on the service path, service processing response capability of each knot point and response demand of each knot association path are comprehensively considered to acquire a relative value of stability of the service path which is utilized for selecting the service path and improving the service path.