105 results about "Structural diversity" patented technology

The invention belongs to the construction method of a deep foundation pit of industrial construction, particularly relates to a reverse operating construction method of a round deep foundation pit concrete piling support and a main structure and solves the problem that the existing construction method of the deep foundation pit is not suitable for complex geological condition and the construction cost is too high. The construction method comprises the following steps: the center of the foundation pit is adopted as the center and the outer sides of the position of the main structure are respectively distributed with pilings; the top parts of the pilings are poured with crown bore beams which connects the top parts of the pilings into one body; the first section of the foundation pit is excavated, reverse operation is carried out to the outer layer of the first section of the main structure; the outer layer of the first section of the main structure and the pilings are integrated by the crown bore beams so as to form a primary support of the foundation pit; the foundation pit is excavated by sections, reverse operating construction of the outer layer of the main structure is carried out by sections, which form a foundation pit support together; and normal operating construction is carried out to the inner layer of the main structure. The invention is applicable to poor geological condition and is particularly applicable to structural diversity of the soil layer in the depth range of excavation of earthwork, thus ensuring the stability of the soil body of the main structure in the construction period, greatly reducing the cost of construction measures and improving the construction speed.

The invention relates to a fully automatic lumbar vertebral image segmentation method based on pre-emphasis strategy, The method comprises the following steps: a data generation method based on humanlumbar vertebrae structure and magnetic resonance contrast characteristics automatically generates a large number of spine magnetic resonance images with rich structural diversity and texture diversity of the spine, and completes the training of the lumbar vertebrae image segmentation model; Using the trained segmentation model, the automatic segmentation of vertebral body and intervertebral discin spinal MRI data is realized. The invention can solve the problem of the limitation of the data of the traditional training model, and has high model generalization ability. There are many kinds oflumbar magnetic resonance images which are adaptable to different hospitals, different scanning machines and different scanning parameters.

The invention discloses an alkenyl amide triazole compound and a synthetic method thereof. The compound has the following structural formula (see the formula in the description). According to the synthetic method, alkyl or aryl azide, various kinds of amine and various substituted 5-halogeno-2-furfuryl alcohol compounds are used as starting raw materials, and a 1,2,3-triazole and alkenyl amide conjugated skeleton structure of (Z)-configuration is generated through a [3+2]-cycloaddition, furan ring opening and amidating series reaction accelerated by lewis acid. The synthetic method is easy to operate, the used reagent is the low-cost lewis acid, the substrate is wide in application range and capable of being used for synthesizing a series of complex alkenyl amide triazole compounds substituted by functional groups highly, and step economy, product structural diversity and (Z)-configuration stereospecificity are high.

The invention relates to a novel synthetic method for beta-amino acids and the beta-amino acids synthesized by adopting the method. The method comprises the following steps: an amide and an azo diacidester are taken as raw materials, an intermediate compound I is synthesized through direct carbon-hydrogen bond amination under the action of a catalyst, the intermediate compound I reacts with methyl bromoacetate to synthesize an intermediate compound II, an amide protecting group is removed under acidic conditions, and therefore the beta-amino acid is obtained; and the chemical structural formula of the beta-amino acid obtained by synthesis is shown in the description, wherein in a formula, R1 and R2 are separately one selected from the group consisting of hydrogen, alkyl, branched alkyl, cycloalkyl, aryl, aryl with various substituents, a heterocyclic group and a heterocyclic group with various substituents; and R3 is an ester group. Compared with the prior art, the method provided bythe invention synthesizes the intermediate compound I through the direct carbon-hydrogen bond amination process, so that substrates can be broadened in a wide range, the synthesized beta-amino acids with substituents in alpha and beta positions have structural diversity, and therefore the method provides a novel method for the industrialized production of the beta-amino acids with the substituentsin the alpha and beta positions.

The invention discloses membrane assembly performance detection equipment which comprises a raw water tank, a raw water pump, a core type filter, a high pressure pump, a reverse osmosis membrane system and a clean water tank. The reverse osmosis membrane system comprises at least two membrane assemblies. According to set technological matching requirements, the membrane assemblies can be configured into a one-stage one-section type or a one-stage multi-section type or a mixed section type formed by mixing the one-stage one-section type and the one-stage multi-section type, so that the membrane assembly performance detection equipment can carry out different technological matching tests on the membrane assemblies, the problem that existing membrane assembly performance detection equipment has a single structure and can only carry out performance detection tests on one membrane assembly is solved, and the structural diversity and applicability of the membrane assembly performance detection equipment are improved.

The invention discloses a strain of bacillus cereus which is preserved in China General Microbiology Center of Committee for Culture Collection of Microorganisms since 31st December, 2014, and the preservation number is CGMCC No. 7069. The bacillus cereus L90 provided by the invention is capable of improving the drought resistant capability of juglans regia. Experiment research shows that after the bacillus cereus provided by the invention is inoculated to the surround of juglans regia roots and juglans regia is stressed by drought for a certain time, juglans regia is substantially improved in bacterial community structure diversity in rhizosphere soil compared with juglans regia inoculated with common growth-promoting bacteria, the leaf relative water content and the water utilization efficiency are improved, and the drought resistance of the plant is enhanced. Therefore, the bacillus cereus provided by the invention or a bacterium preparation by taking bacillus cereus as a raw material can be used as an inoculation agent and applied to drought environment, and the bacillus cereus provided by the invention helps to provides an excellent bacterial strain resource for improving the drought resistance of juglans regia.