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98results about How to "Significantly improved" patented technology

Full-automatic coronary artery segmentation method

The invention relates to a full-automatic coronary artery segmentation method. The method comprises the steps of: segmenting out a heart region; carrying out vessel enhancement processing; automatically detecting seed voxels; and segmenting a coronary artery. Firstly, the heart region comprising the coronary artery is segmented out, a segmented image nearly does not include any noisy point, and both segmentation accuracy and efficiency are superior to a result obtained by methods such as an EM algorithm and the like; by carrying out vessel enhancement processing on the heart region segmented out, a coronary image is obviously enhanced; by carrying out automatic detection of the seed voxels on the image subjected to vessel enhancement processing, a seed voxel set is detected out, the problem that a conventional region segmentation method needs manual intervention is solved, and robustness is improved; and finally, by consistency judgment, the coronary artery is segmented out. Relative to a method for carrying out region segmentation only by using a gray value as the standard, the full-automatic coronary artery segmentation method disclosed by the invention dynamically changes a consistent interval in consistency judgment, and not only avoids manual intervention, but also improves accuracy of segmenting the coronary artery.
Owner:BEIJING NORMAL UNIVERSITY

Acid electrode with good process performance

InactiveCN101954554AImprove all-position welding adaptabilityImprove restriking performanceWelding/cutting media/materialsSoldering mediaSlagRare earth
The invention discloses an acid electrode with good process performance, and belongs to the technical field of welding materials. The electrode consists of a core wire and a coating. The coating is characterized by comprising the following components in percentage by weight: 25 to 35 percent of titanium pigment and rutile, 15 to 20 percent of selected ilmenite, 5 to 10 percent of marble and dolomite, 5 to 10 percent of white mud, 3 to 8 percent of mica, 8 to 15 percent of potash feldspar, 4 to 7 percent of quartz sand, 8 to 13 percent of manganese-silicon, 2 to 4.5 percent of chalk, 1 to 1.5 percent of sodium carbonate, 3 to 5 percent of organic matters and 0.5 to 2 percent of rare earth magnesium powder, atomized iron powder and aluminum powder, wherein the grain size of each component is 40 to 200 meshes. Potassium sodium water glass is used as a bonding agent; the modulus is 2.4 to 2.7; and the Baume concentration is 36 to 39. After uniformly mixing the components of the coating of the electrode, adding the water glass and stirring uniformly to obtain a mixture, a carbon steel covered electrode is manufactured by extruding the mixture on a core wire H08A; or a low-alloy steel electrode is manufactured by extruding the mixture on a low-alloy steel core wire. The electrode of the invention has the characteristics of high arc reignition, slag detachability and all-position welding adaptability, and low cost of electrode raw material.
Owner:SHANDONG JIANZHU UNIV

Efficient enhanced flame-retardant heat-conducting shading multifunctional master batch for nylon direct injection molding and preparation method thereof

ActiveCN109503969AGood modification effectSolve the technical problem of mismatching processing temperatureGlass fiberIonomer
The invention belongs to the technical field of plastic modification and processing and especially relates to an efficient enhanced flame-retardant heat-conducting shading multifunctional master batchdirectly used for nylon direct injection molding and a preparation method thereof. The multifunctional master batch is composed of a master batch A and a master batch B, wherein the master batch A comprises the following components by weight percent: 50.0-60.0wt.% of glass fiber, 25.0-35.0wt.% of high-flow nylon resin, 5.0-10.0wt.% of maleic anhydride grafted ionomer, 3.0-8.0wt.% of star-shaped nylon 6 resin and 0.1-0.3wt.% of antioxidant. Compared with the traditional plastic functional master batch, the multifunctional master batch prepared according to the invention has the advantages thatmodified efficiency loss caused by mutual shearing abrasion of glass fiber and fire retardant as well as inorganic functional modified additive grains during the processing process can be avoided; the problem of mismatching processing temperatures of the two modified systems can be solved; compared with modified efficiency of a traditional enhanced bromine flame-retardant system, modified efficiency of the two modified systems is obviously promoted; the master batch has the characteristics of easiness in dispersing and processing and can be used for injection molding after direct simple mixing with nylon 6 resin at ratio.
Owner:江苏万纳普新材料科技有限公司
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