89 results about "Branch length" patented technology

The invention discloses a hepatic vein vascular tree modeling method and a system thereof. The method comprises the following steps: using a liver model to obtain a liver image, and utilizing the multi-scale filtration method to strengthen a blood vessel; cutting a hepatic vein; extracting a central line of the hepatic vein; detecting and removing a link in the central line; and utilizing OSG/VTK to rebuild the hepatic vein vascular tree after pruning. The system comprises an image acquisition module, a blood vessel strengthening module, a blood vessel cutting module, a vascular tree central line extracting module and a vascular tree rebuilding module. The invention improves similarity functions in the filtering process, analyzes the characteristics of the ring and adopts corresponding unlinking methods for different links; and utilizes the relation of radius of blood vessel and the branch length when pruning. The invention effectively enhances the hepatic vein, improves the contrast between the blood vessel and liver parenchyma, and can extract more than five class branches, effectively unlink and prune the central line of the hepatic vein, rebuild the hepatic vein vascular tree and directly display the branches of the heptatic vein.

The invention discloses a propagation method of camellia amplexicaulis cohen stuart by using shoot cutting. The propagation method comprises the steps of: firstly, transplanting mother seedlings which are cultured through seedling culturing and are taken as cutting mother seedlings into a garden using composted organic fertilizers and calcium magnesium phosphate fertilizers as base fertilizers, and culturing, wherein the plant spacing between the two adjacent rows is 25cm*30cm; performing cutting back and sprouting promoting at a position where a mother plant base parts is 10-15cm away from the ground, collecting cutting woods with branch lengths of 5-8cm, and cutting in a cutting bed provided with a cutting substrate; and controlling illumination, relative humidity and substrate water content in the cutting bed to obtain a cutting seedling of the camellia amplexicaulis cohen stuart. According to the propagation method, the garden for culturing the mother seedlings, an exposed plot isselected for ridging and close planting, the mother seedlings are developed in root systems, are high in growth speed and are also high in growth speed of branches sprouting, a rejuvenating effect oflow-level trunk cutting is good, cutting woods are easy to root and are shorter than branches in the common shoot cutting, and thus a collecting interval of the cutting woods can be shortened, the propagation efficiency is improved, and 5-6 times of cutting propagation can be carried out one year, so that a large quantity of seedlings are obtained; and the propagation method has the advantages ofbeing low in production cost, relatively small in material consumption, simples in operation, large in supply quality of the cutting woods, and relatively good in economic benefit.

The invention provides a method and device for monitoring an optical layer of a passive optical network based on a two-dimensional optical orthogonal code. Each user is identified by using the two-dimensional optical orthogonal code. An optical encoder is added in the front of user equipment. The optical encoder performs optical encoding on a detected optical pulse and reflects an encoded optical signal to a monitoring system. The reflected optical signal is decoded in the monitoring system. The health state of each branch optical fibre is judged through the decoded signal. An optical power detection part in the monitoring system performs fault location and analysis functions simultaneously. In the invention, the link state of an optical network is monitored by adopting the passive optical device without limitation of a network topological structure and branch length. The device disclosed by the invention can identify that a fault is in the user equipment or an optical fibre link, judge the branch in which a fault is and position the specific position of the fault, and support the monitoring of the optical fibre link of the high-user-capacity passive optical network.

The invention relates to a method for obtaining a shrub branch length based on a digital image technology. A device capable of accurately obtaining plant fractal characteristics is designed through the method by using digital images obtained by a digital camera, a computer image processing method and a fractal characteristic method, and a method for obtaining a shrub branch length according to the dimensions of a plant fractal box is given out; and the plant branch length can be quickly, completely and accurately obtained through the analysis of the image fractal characteristics. The method provided by the invention provides a novel train of thought to quantitatively research the growth dynamic characteristics of an over-ground part of a desert shrub, has a great significance to the promotion of the development and completion for accurately and quickly obtaining the dynamic growth monitoring statuses of desert plants in the wild, and overcomes the shortcoming in a method for continuously measuring the growth of over-ground organs of plants.

The invention discloses a grain counting method for a spike of a single rice based on digital image processing technology. The method comprises the steps that S1) the correlation between a characteristics parameter and the grain number of the spike of the rice is established, a first branch of the spike is straightened, a spike image is obtained via a scanner, and the spike image is preprocessed; S2) mathematic morphological processing is carried out on the preprocessed spike image to remove part which is low in structural element, and a hole filling operation is carried out to remove all non-target objects; S3) characteristic parameters of the area and the total first-branch length of the grain part of the spike image are extracted; S4) mathematic models between the characteristic parameters and the grain number are established; and S5) the mathematic model between the characteristic parameters and the grain number are verified. The grain counting method based on digital image processing technology can be used to count grains of the spike accurately, rapidly and objectively, and the grain counting efficiency of the spike is improved.

The invention discloses a gold micron feather cluster modified with silver nanoparticles and a preparation method and application thereof. The gold micron feather cluster is characterized in that the silver nanoparticles are coated on an aluminum sheet, of which the surface is provided with pit arrays, wherein the particle diameter of the silver nanoparticles is 15-25 nm, and the gold micron feather cluster has the diameter of 32-658 microns and consists of gold micron feathers which consist of gold nanoparticles with the particle diameter of 200 nm to 1 micron and have the feather rod length of 16-329 microns, the feather branch length of 8-160 microns and the small feather branch length of 2-13 microns. The method comprises the following steps of: firstly obtaining the aluminum sheet, of which the surface is provided with the pit arrays which are hexagonally arranged in an orderly manner and are bowl-shaped, by using an anodic oxidation method; carrying out gold nanoparticle ion sputtering on the aluminum sheet so as to obtain the aluminum sheet coated with the gold nanoparticles; then putting the aluminum sheet coated with the gold nanoparticles in an argon atmosphere, and annealing so as to obtain the aluminum sheet coated with the gold micron feather cluster; and carrying out silver nanoparticle ion sputtering on the aluminum sheet coated with the gold micron feather cluster, thereby producing a target product. The gold micron feather cluster modified with the silver nanoparticles can serve as a surface-enhanced Raman scattering active substrate, and the content of rhodamine or tetrachlorobiphenyl attached onto the gold micron feather cluster is measured by using a laser Raman spectrometer.

The invention discloses a cuttage propagation method of Juniperus media 'Pfitzeriana Aurea', which comprises the following steps of selecting cutting woods, processing the cutting woods by using a plant growth regulator, carrying out cottage, culturing rootage, transplanting, carrying out seedling management and the like, wherein the step of selecting cutting woods is to clip branches of the Juniperus media 'Pfitzeriana Aurea' with the branch length of 3-8cm and the lignification degree of 1mm-2cm; and a nutrient liquid with certain concentration is sprayed in the process of culturing the rootage. The cuttage propagation method has the advantages of high rootage ratio, favorable rootage effect, rapid growth of nursery stock, high transplant survival rate and the like. Besides, compared with the conventional cuttage propagation method, the method enables the quantity of the utilizable cuttage to be improved by 3-4 times and solves the problem of insufficient quantity of the cutting woods of the Juniperus media 'Pfitzeriana Aurea' to a certain degree.

The invention relates to a method for stunting potted osmanthus fragrans. According to the method, osmanthus fragran varieties with multiple branches and dense internodes are sieved as potted varieties based on the characteristics of indoor pot culture, and the growth potential, branch incidence, branch length, plant shapes and the like of the osmanthus fragrans are controlled effectively by picking bud, pruning and applying a growth inhibitor, so that apical growth is inhibited, the germination of branches is promoted, and the lengths of internodes are controlled; and osmanthus fragran container seedlings of which the height is between 30 and 40 centimeters and the crown diameter is between 35 and 50 centimeters and which bloom are cultivated after three years by reasonable fertilizer and water management, so that the potted osmanthus fragrans are stunted.

The invention belongs to the field of regulation of preparing of a precious metal nanometer system, and relates to a simple small-size gold nanoparticle star with the regulatable branch lengths and a preparing method of the gold nanoparticle star. A one-step growth method is used for preparing the gold nanoparticle star, and in the preparing process, light irradiation is added, so that the small-size gold nanoparticle star is obtained; and regulation of the branch lengths of the gold nanoparticle star is achieved. According to the preparing method, a commonly-used biological buffer solution reagent-HEPES is used for serving as a reduction agent, a stabilizing agent and a shape inductive agent of the system; and after the pH value of the system is adjusted to range from 7.0 to 7.5, a certain amount of chloroauric acid (HAuC14) is directly added, light radiation with different wave lengths is added, and after a time, the small-size gold nanoparticle star with different branch lengths can be formed. The method is easy, efficient and environment-friendly in operation, and the small-size gold nanoparticle star with the different branch lengths and good stable dispersion performance is obtained.

The invention relates to a rapid propagation method for autumn single node cutting of tea-oil trees. The method comprises the steps of building a rectangular piece of land for cutting, i.e., selecting a common rectangular piece of land, changing the soil layer locally, and replacing subsoil with underearth; selecting seedlings, i.e., selecting well-bred tea-oil parent tree branches with a branch length being 20 cm or over 20 cm and a stem diameter being 3 mm or over 3 mm; obtaining cuttings by cutting, i.e., cutting semi-lignified red-stem branches off to obtain the cuttings being 3-4 cm long and having one leaf and the cutting being 4-5 cm long and having two leaves by way of obliquely cutting the red-stem branches off; preparing an agent, i.e., pouring a rooting powder diluent into two treated containers, wherein the depth of the agent liquor poured into the containers reach 2-3 cm; dipping the cuttings, i.e., binding the cut cuttings into a small bundle in a certain quantity by way of aligning the lower cuts of the cuttings, dipping the small bundle in the containers with the rooting powder diluent, and dipping the small bundle for two hours and then taking the small bundle out; carrying out cottage on the cuttings, i.e., carrying out cottage on the dipped cuttings in the land for cutting according to a sequence of the cuttings with one leaf and the cuttings with two leaves; and hermetically covering the land, i.e., hermetically covering the land with a small arch shed thin film and covering the thin film with a sunshade net, wherein the shading degree of the sunshade net is 70%-80%.

The invention discloses a determination method for length and number of low-frequency cable conductors of a spacecraft. The determination method comprises the following steps: (1) reading the information of all branches of to-be-processed cables, information of electrical connector pairs and the specification and number information of the conductors used between each pair of electrical connectors in an external cable junction table, and acquiring a cable conductor number table containing the information of all the branches of to-be-processed cables, the information of the electrical connector pairs and the specification and number information of the conductors; (2) acquiring a cable branch length diagram, and compiling structural cable branch length data; (3) working out the length of the conductors between each pair of electrical connectors in each cable. According to the method disclosed by the invention, automatic computation of the length of complicated cables is realized, the workload of manual computation and processing is greatly reduced, the development requirements on high-efficiency and high-quality aerospace products are met, and the problem and the difficulty puzzling the development effort of the low-frequency cables of the spacecraft for a long time are solved, so that the automation level of the development effort of the low-frequency cable products of the spacecraft is further improved.

The invention belongs to the technical field of power frequency communication channel state analysis algorithms, and particularly relates to a method of evaluating the state of a power frequency communication channel. The method comprises steps: through acquiring data influencing the quality of the power frequency communication channel such as lengths of different power lines, the power line branch number, a branch length, load impedance characteristics, power line types and power line noise, a power frequency communication channel quality evaluation data storage and sharing platform is built; on the basis, the data are mined and calculated; and an Adaboost ensemble learning algorithm is used, through an expert analysis system and a neural network algorithm based on deep learning, the state of the power frequency communication channel under multiple parameters is evaluated comprehensively. Compared with the traditional simplex and fixed channel state evaluation method, the method of the invention can continuously learn and optimize the evaluation model according to changes of influence factors, and a more accurate channel state is obtained.

The invention relates to a genetic algorithm based power distribution system network structure optimization method. A mathematic model taking minimal unit power supply capacity expense as a target function is established, the contact branch length, contact capacity, regional load demands and total number of contact channels among main transformer substations are taken as constraint conditions, and a genetic algorithm is used for solving. The method disclosed by the invention fully coordinates a contact structure relationship between a high-voltage transformer substation and an inferior medium-voltage power grid and can achieve the optimal economic effect on the basis of meeting the regional load demands. The optimal solution is searched by simulating a natural evolutional process according to an artificial intelligent algorithm, namely the genetic algorithm. The problems of wrong search direction, iterative misconvergence, low approach velocity and the like often caused in solving for power distribution network contact structure optimization by a conventional algorithm can be effectively solved.

The invention relates to a method for angularly cuttage breeding wilsonii underground, which is to solve problem of wilsonii asexual propagation in current technology, and characterized in that it comprises the following steps: (1) cuttage mode: angularly cuttage, the vertical distance from bud in top of wilsonii branch to surface is 4-7 cm, distance from branch base to ground surface is 15-20 cm; (2) the branch age of wilsonii is 3-5 years; (3) the branch length is about 30-100 cm. The method changes the traditional cuttage mode of asexual propagation, and the survival rate is as high as 80%.

The invention provides a method for calculating the partial discharge fault probability of a cable. The method comprises the following steps: 1) carrying out partial discharge and temperature detection on a to-be-detected cable, and continuously measuring partial discharge capacity and temperature data of the cable in n delta t time intervals; 2) calculating the increment delta Xi (i = 1, 2, ...,n) of the micropore of the electric tree in the ith delta t time period, solving a nonlinear equation set, and obtaining an estimated value L2i (i = 1, 2, ..., n) of the length l of the electric treeof the to-be-measured cable; 3) repeating the step (2) for n times to obtain estimated values L21 to L2n of the length of the electrical tree in n time periods, and carrying out non-parametric statistics on the estimated values L21 to L2n to obtain a probability density distribution function hFD (1) of the length l of the electrical tree of the cable to be measured; 4) counting the electric branchlength of the cable when the cable is close to the fault to obtain the probability density distribution fFD (L) of the electric branch length of the fault cable; and 5) solving the partial dischargefault probability FFD of the cable by integrating the hFD (1) and the fFD (L). The method has the beneficial effect that the purpose of quantitatively evaluating the fault probability of the XLPE cable by utilizing the partial discharge signal and the temperature data is achieved.

The dissolution of polymeric drag reducing agents (DRAs) in flowing hydrocarbon fluids is improved by incorporating branching into the polymer DRAs. A branched polymer of the same molecular weight will have a smaller overall size because of its reduced radius of gyration (Rg), and thus dissolve more readily. In one non-limiting embodiment, the polymer is a poly(alpha-olefin) and the branches are long-chain branches (Y-branching) and/or induced or H-branching, whereby the induced branch length may have an average chain length of at least 4-8 carbon atoms.

The invention relates to a method for preparing a three-dimensional dendritic magnetic cobalt nano material through self-assembly of two-dimensional lamellar constitutional units. As an application of a composite microwave absorbing material, the method is characterized in that the trunk length of the three-dimensional dendritic magnetic cobalt nano material is 2-9 mu m, and the branch length of the material is 1-4 mu m; basic constitutional units are in a lamellar structure, and the particle size of each constitutional unit is 200-500 nm; and the three-dimensional dendritic magnetic cobalt nano material is formed by face-to-face directed connection and growing of the lamellar constitutional units. The method for preparing the three-dimensional dendritic magnetic cobalt nano material comprises the following steps: (1) preparing a cobalt chloride hexahydrate solution; (2) preparing a sodium hydroxide solution; (3) adding the solution is step (2) into the solution in step (1) and mixing the two solutions fully; (4) adding pyromellitic acid and sodium hypophosphite into the solution is step (3) and mixing the mixture fully; and (5) processing the solution in step (4) under a hydrothermal condition, cleaning the obtained product with deionized water and absolute ethyl alcohol, and then drying the product in vacuum, thus obtaining the dendritic magnetic cobalt nano material.

The invention discloses a preparation method of a flower-like silver nanozyme with peroxidase activity and belongs to the technical field of preparation of nano materials. Under the condition of continuous stirring, an aqueous solution of histidine with pH of 11.2-11.8 is mixed with a silver nitrate solution, and then a reducing agent, a hydroxylamine solution is added; and after the reaction lasts for 5 minutes, the flower-like silver nanozyme with good monodispersity is obtained. By changing the pH value of the histidine, the flower branch length of the product can be adjusted, and by changing the final concentration of the histidine, the size of the product can be adjusted. The preparation method is easy to operate; by changing the reaction conditions, the flower-like silver nanozyme ofdifferent sizes and different flower branch lengths can be prepared; and the prepared flower-like silver nanozyme has good monodispersity and extremely-high peroxidase activity, and can better meet the needs of practical application.