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51results about How to "Improve overall" patented technology

Conformal antenna array directional diagram comprehensive method based on invasive weed optimization

The invention relates to a conformal antenna array directional diagram comprehensive method based on an invasive weed optimization. The conformal antenna array directional diagram comprehensive method is characterized by at least comprising the following steps of: a step 101 of carrying out population initialization; a step 102 of carrying out growth and reproduction; a step 103 of carrying out spatial diffusion; a step 104 of carrying out competition and repulsion; a step 105 of determining if the seed number reaches the maximum number of population; a step 106 of selecting solutions, the number of which is Qsize, with best adaptive values in dependence on a competitive survival rule; a step 107 of determining if a present number of iterations reaches the largest number of iterations, and proceeding with the step 102 if the present number of iterations does not reach the largest number of iterations, i.e., iter<iter[max], and otherwise carrying out a step 108 of quitting an algorithm implementation process and outputting an optimal solution. In the conformal antenna array directional diagram comprehensive algorithm, the adaptability is set as a standard reproduction mechanism, and an offspring-and-parent competition and repulsion mechanism is employed, the conformal antenna array directional diagram comprehensive algorithm is global and effective, the algorithm is prevented from falling into a local optimal solution, and useful information is reserved to capacity.
Owner:XIDIAN UNIV

RNA secondary structure prediction method for quantum genetic algorithm based on multi-population assistance

The invention belongs to the technical field of bioinformatics and discloses an RNA secondary structure prediction method for a quantum genetic algorithm based on multi-population assistance. According to the method, a stem pool and a stem compatibility matrix of an RNA sequence is established according to the RNA sequence; quantum bit vectors are used to initialize multiple chromosome populations; quantum measurement is performed on each population; optimal individuals are acquired according to measurement results; the optimal individual b in all the populations is obtained and used to replace worst individuals, nonhomologous to b, among the optimal individuals in other populations, then all the populations are updated by use of different rotational angles, and other populations not participating in replacement are updated by use of a fixed rotational angle; and the process is iterated till a stop condition is met. Through the method, the global search capability and search efficiencyof the quantum genetic algorithm are effectively improved, and the evolution algebra of the genetic algorithm is lowered. Meanwhile, all the populations suppress competition and cooperate mutually, so that the globality of the algorithm is improved, and prediction accuracy is substantially enhanced.
Owner:XIDIAN UNIV

Sky image cloud cluster movement velocity computing method based on phase correlation principle

InactiveCN104778728AShort timeThe calculation process is simple and directImage analysisPhase correlationFrequency spectrum
The invention relates to a sky image cloud cluster movement velocity computing method based on the phase correlation principle. The method comprises the following steps that 1, an initial image and a displacement image of a sky image are acquired; 2, gray matrixes of the initial image and the displacement image are generated respectively; 3, image frequency spectrums of the initial image and the displacement image are acquired through the two-dimensional Fourier transform; 4, cross-power spectrum of the initial image and the displacement image and an inverse Fourier transform response matrix of the cross-power spectrum are computed; 5, spike pulse coordinates of the response matrix are extracted to serve as cloud cluster displacement vectors; 6, the cloud cluster movement velocity is computed according to the cloud cluster displacement and the image time interval. According to the sky image cloud cluster movement velocity computing method based on the phase correlation principle, the operation flow is simple and direct, and the cloud cluster displacement prediction consuming time can be greatly shortened; the overall movement condition of a cloud cluster in the image can be recognized more effectively, and due to normalization processing in cross-power spectrum computing, the higher robustness is achieved for global image noise.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1

Manufacturing and processing method of composite rubber sealing element

The invention relates to a manufacturing and processing method of a composite rubber sealing element. The manufacturing and processing method mainly comprises the following steps of putting the sealing element, supporting the sealing element, removing materials on the end surface, carrying out trimming treatment, collecting finished products and the like. The used manufacturing and processing equipment of the composite rubber sealing element comprises a fixed base, an air cylinder, a limiting cylinder, a material removing device and a trimming device, wherein the air cylinder is arranged on the left side of the upper end of the fixed base through an air cylinder base, the limiting cylinder is fixed on the right side of the upper end of the fixed base, the material removing device is arranged at the ejection end of the air cylinder, the material removing device is arranged on the limiting cylinder in a sliding mode, and the trimming device is arranged in the middle of the fixed base. According to the manufacturing and processing method, the problems that a traditional manufacturing and processing method of the composite rubber sealing element is only used for clamping and fixing thecomposite rubber sealing element, then trimming and finishing treatment is carried out, due to the influence of rubber elasticity, the trimming and finishing effect is not ideal, and finishing treatment cannot be carried out on the upper end surface can be solved.
Owner:管梦馨

Novel optimal design method for permanent magnet synchronous linear motor

The invention relates to a novel optimal design method for a permanent magnet synchronous linear motor. The method comprises the steps that (A) a sample machine is analyzed, and main structural parameters which can influence motor performance are determined; (B) a machine learning algorithm -KNN algorithm is used for training and regression fitting of finite element analysis data; (C) a global-scope optimizing algorithm-gravity center neighborhood optimal algorithm is adopted for optimization of motor performance output parameters; and (D) a group of optimal motor structural parameters are solved reversely according to optimal values, and a sample machine is fabricated according to the motor structural parameters and then tested. The method provided by the invention has the beneficial effects that (1) stability, reliability and efficiency of motor running are enhanced; (2) computation results obtained by a finite element analysis method are accurate, and errors during the computation can be eliminated; (3) the KNN algorithm is used for the training fitting of the sample data generated by the finite element analysis, a non-parametric rapid computing model is established, and a foundation is provided for subsequent intelligent algorithm optimization; and (4) application of the gravity center neighborhood optimal algorithm has higher global superiority and is quicker and more accurate.
Owner:ANHUI UNIVERSITY

Grey wolf algorithm-based economic back pressure optimization method for wet cooling unit of thermal power plant

The invention discloses a grey wolf algorithm-based economic back pressure optimization method for a wet cooling unit of a thermal power plant. The method aims to maximize the net economic benefit obtained by power generation of a cold end system of the unit, and the net economic benefit is mainly composed of the economic benefit brought by the increase of the power generation power of the steam turbine, the economic cost required for circulating water flow regulation and the economic cost required for circulating water temperature regulation. The method is based on a wet cooling unit back pressure model, takes unit operation conditions, circulating water flow and condenser inlet circulating water temperature as input variables, takes unit back pressure as an output variable, adopts a greywolf algorithm after position updating strategy improvement and population evolution mechanism improvement, and the optimal back pressure can be found more quickly and accurately through the random and rapid traversal of the input variables. According to the method, the problem that the economic back pressure of the thermal power plant is difficult to determine due to equipment parameters and operation condition changes is solved, the time required for determining the economic back pressure of the unit is effectively shortened, and the optimization precision of the economic back pressure is improved.
Owner:HANGZHOU DIANZI UNIV

Robot path optimization method and system based on improved particle swarm algorithm

The invention discloses a robot path optimization method based on an improved particle swarm algorithm. The robot path optimization method comprises the following steps of constructing a gridding mapfor a robot activity space and obstacles in the activity space; dividing the gridded map into an obstacle area and a free area; constructing a path optimization function according to the first path ofthe robot and an optimization target; adopting an improved particle swarm algorithm to iterate an optimal position value in the free area, and calculating an optimal detour path of the robot in the free area according to the optimal position value; wherein the improved particle swarm optimization algorithm specifically comprises the following steps of taking a path optimization function as an appropriate value function of particles; and taking the dynamic inertia weight as the inertia weight of the particle swarm algorithm. The method is advantaged in that path optimization can be carried outin a complex environment, and globality of path optimization is improved. The invention further discloses a robot path optimization system based on the improved particle swarm algorithm, and a storage medium.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1

Lightweight steel-ultrahigh-performance concrete stiffened combination rib plate and construction method thereof

The invention discloses a lightweight steel-ultrahigh-performance concrete stiffened combination rib plate and a construction method thereof. The combination rib plate comprises a panel (1), a slab rib (2), a stiffened strengthening component (3) and a shear connecting part (4), the stiffened strengthening component (3) is arranged on the bottom of the slab rib (2) and has the equal width with thebottom face of the slab rib (2), the slab rib (2) and the stiffened strengthening component (3) are connected into a whole through the shear connecting part (4), the top of an edge plate rib on the edge of the combination rib plate is provided with a notch (5), and a plurality of wedge-shaped ports (6) are formed under the notch (5) in the length direction of the edge plate rib. The lightweight steel-ultrahigh-performance concrete stiffened combination rib plate and the construction method thereof have the advantages that the problem that the steel-ultrahigh-performance concrete rib plate fatigues and cracks easily is solved, the crack resistance of a wet joint between precast slabs is significantly improved, the excellent tensile and compressive properties of ultrahigh-performance concrete and steel material can be fully utilized, the structural self-weight is lighter, the utilization efficiency of the cross section is higher, the integral and local rigidity of a bridge deck slab ofthe stiffened combination rib plate is higher, the anti-crack and anti-overload capacity is strong, and the construction is convenient.
Owner:HUNAN UNIV +1

Feature fine matching method and application based on minimum spanning tree

The invention belongs to the technical field of digital image processing, and discloses a feature fine matching method and application based on a minimum spanning tree, and the method comprises the steps: converting an image into an HSL space, and carrying out the convolution of an L channel through a multi-scale Gaussian function; correcting the illumination component of the image to enhance a brightness non-uniform region in the image; equalizing brightness components among the three-line array CCD images after dodging; adopting surf feature matching for the preprocessed three-line array CCD dodging image to serve as rough matching feature points; calculating an affine transformation matrix by roughly matching the affine transformation relation of the feature point pair; generating an image minimum spanning tree according to the color in the image and the distance information, and taking the image minimum spanning tree as a weight to constrain a least square matching algorithm; and calculating a matching window correlation coefficient, continuously iterating the search window, and outputting by taking the center point coordinate as a matching point pair. The sparse matching provided by the invention has good registration precision, the average matching precision of the algorithm is 97.21%, and the average matching time is 6.3443 s.
Owner:南京天巡遥感技术研究院有限公司 +1

Milky sweet flavor characteristic of cordyceps for cigarette tipping paper and application and preparation method thereof

The invention discloses a milky sweet flavor characteristic of cordyceps for cigarette tipping paper, which comprises the following components in parts by weight: 1-10 parts of cordyceps extract, 10-30 parts of vanillin, 1-5 parts of heliotropin, 0.1-0.5 parts of dihydrocoumarin, 10-35 parts of 95% ethanol and 20-80 parts of propylene glycol. The milky sweet cigarette tipping paper with cordycepscharacteristics is the milky sweet flavor with cordyceps characteristics added to a printing ink. The preparation method comprises the following steps: the raw materials of cordyceps sinensis are crushed, refluxed and concentrated to obtain cordyceps extract; all the components are mixed according to the volume ratio, and fully stirred; the milky sweet flavor is added into the printing ink of thecigarette tipping paper, the printing ink is printed onto the tipping paper base paper, and then the milky sweet and fragrant cigarette tipping paper with the characteristics of the cordyceps is obtained through the processes of gilding, slitting and punching. In the method, the soft and comfortable milky sweet aroma style is imparted to the cigarette, the suction quality is improved, the smoke issoft and comfortable, the taste is improved, the delicate smoke is improved, at the same time, the pharmacological and healthcare effects of the cordyceps are provided, so that the comprehensive quality and the safety of the cigarette are improved.
Owner:INNER MONGOLIA KUNMING CIGARETTE CO LTD

Fireproof energy-saving steel structure

The invention discloses a fire-resistant energy-saving steel structure which comprises a supporting column, a connecting column, a supporting frame, a supporting structure and a connecting assembly, the connecting column is of an I-shaped rod-shaped structure, a fastening cavity is formed in the connecting column in the axis direction of the connecting column in an extending mode, and positioning grooves are formed in the I-shaped outer side edge of the supporting column at equal intervals. A supporting structure is arranged at the positioning groove, and connecting assemblies are installed at the two ends of the supporting column. The connecting assembly comprises a connecting block, a protruding column and a protruding plate, the connecting block is of an I-shaped block structure, the protruding column is fixed to one side edge of the connecting block, the protruding column is of a rectangular block structure, fastening holes are formed in the two ends of the protruding plate and the two ends of the connecting column, and the protruding plate and the connecting column are fixed through fastening bolts. The fireproof and energy-saving steel structure is reasonable in design, capable of improving the whole and edge supporting effect of the middle section of the steel structure, convenient to install and suitable for application and popularization.
Owner:张维鹏

Passive door-leaf-concealing door

The invention discloses a passive door-leaf-concealing door. Through arrangement of an external aluminum frame with heat insulation property, butt-joint gaps formed between the periphery of a door leaf and a door frame during door leaf closing are completely shielded and concealed, the door leaf concealing function is achieved, thus the integrity degree of the outer side of a building is improved,and the aesthetic property of the outer side of the building is increased. Through filling of a door cavity of the door leaf with a fire-resistant heat insulation material, arrangement of a heat insulation layer on the external aluminum frame, ladder-like arrangement of all connecting plates on the door leaf, and the sealing connecting effect of sealing rubber strips at all butt-joint positions,the heat transfer coefficient of the whole door can reach the using standard of a severe cold area, the heat insulation property is extremely good, and the passive door-leaf-concealing door with highpracticability is formed; and meanwhile, through arrangement of matching of the water-retaining sealing rubber strips with skew fillets on an external door plate, the property of resistance for wetting by rain of the whole door structure is improved, the problem that a rain cape cannot effectively shield rainwater for the bottom of the door leaf is solved, the service life of the door leaf is prolonged, the rainwater can be effectively prevented from leaking into an indoor space from a bottom gap between the door leaf and the door frame, and the practicability is extremely high.
Owner:HARBIN SAYYAS WINDOWS +1
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