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98 results about "Column space" patented technology

In linear algebra, the column space C of a matrix A is the set of all possible linear combinations of its column vectors. Let K be a field. The column space of an m × n matrix with components from K is a linear subspace of the m-space Kᵐ. The dimension of the column space is called the rank of the matrix. A definition for matrices over a ring K is also possible. The column space of a matrix is the image or range of the corresponding matrix transformation.

3D printing internal parting wall and construction method of 3D printing internal parting wall

The invention discloses a 3D printing internal parting wall and a construction method of the 3D printing internal parting wall. The 3D printing internal parting wall comprises a plurality of prefabricated internal parting wall units formed according to the 3D printing technology and arranged side by side, first packing materials arranged in the prefabricated internal parting wall units, steel wire gauze sheets arranged in column space and second packing materials arranged in the column space, wherein butt joint grooves are formed in the two ends of each prefabricated internal parting wall unit, and the column space is formed by butt joint of every two adjacent butt joint grooves. A truss system is applied to an internal parting wall system, overall printing molding is achieved through a 3D printing machine, and the building requirements of walls with special-shaped building models are met; meanwhile, the performance of 3D printing materials is sufficiently played, the automatic degree is high, a large amount of manpower and a large number of materials are saved, and building rubbish is not generated. Continuous concave-convex lines are formed on the surfaces of the prefabricated internal parting wall units; the connection strength between the prefabricated internal parting wall units and the packing materials is improved; compared with a smooth surface, the force of friction is improved, and the combination strength is improved.
Owner:CHINA CONSTR EIGHT ENG DIV CORP LTD

Conductive frequency selective surface utilizing arc and line elements

An electrically conductive coating for an automotive heatable windshield having a communication window with an enhanced frequency selective surface having pass regions (uncoated regions) and blocking regions (coated regions) arranged to pass and Blocks predetermined wavelengths of the electromagnetic spectrum. In one non-limiting embodiment, the frequency selective surface includes a pattern having a first plurality of arcuate discontinuities on one side of the delimiting discontinuities, and a second plurality of arcuate discontinuities on the other side of the delimiting discontinuities. Multiple arc breaklines. Extended continuous barrier areas are between adjacent discontinuous lines. The arcuate discontinuities of one group are embedded within each other, and the arcuate discontinuity having the largest radius of curvature adjacently divides the discontinuity. Each discontinuous line has alternating blocking and passing regions. In another embodiment, the enhanced frequency selective surface has a plurality of columns separated from each other by continuously elongated blocking regions. Each column includes a pass area, and each pass area has a perimeter, and the block area is within and spaced from the perimeter. The perimeters of the pass regions are in contact with each other, and the barrier regions adjacent to the pass regions are spaced apart from each other. The elongated blocking area between the discontinuity and the column extends to the perimeter of the communication window. In this manner, current is passed through the coating, through the communication window to eliminate hot and cold spots around and within the perimeter of the communication window.
Owner:VITRO FLAT GLASS LLC

Airspace staggered wave position arranging method for phased array radar

InactiveCN104316907AUniform arrangement modeAvoid variabilityWave based measurement systemsRadarOverlap ratio
The invention discloses an airspace staggered wave position arranging method for a phased array radar. The airspace staggered wave position arranging method for the phased array radar includes steps that 1) selecting a scanning airspace under a correction ball coordinate system; 2) converting the scanning airspace under the correction ball coordinate system into a sine airspace under a sine space coordinate system through coordinates; 3) confirming the line space and column space between adjacent wave positions under the sine coordinate system; 4) confirming the wave position arrangement of the whole sine region to generate a wave position table; 5) removing the wave positions outside the airspace range set by a user to form the staggered wave position arrangement of the scanning airspace. The airspace staggered wave position arranging method for the phased array radar uses the sine coordinate system to carry out wave position arrangement on the whole airspace based on covering the required airspace, avoids the change of the wave beam shape along with the wave beam directing, realizes the uniform arrangement of the wave position under the sine coordinate system, guarantees that the 3 dB coverage rate arrives at 90% while the overlapping ratio is 0, and has broad application prospect.
Owner:NANJING CHANGFENG AEROSPACE ELECTRONICS SCI & TECH

Human face feature extraction and classification method

The invention relates to a human face feature extraction and classification method. The method includes the following steps that feature dimension reduction is performed on human face images through a 2D-PCA method, and a high-dimensional image matrix is converted into a low-dimensional image matrix; the low-dimensional image matrix is converted into one-dimensional column vectors; according to the one-dimensional vectors of images of a training set, an intra-class divergence matrix S<W> and an inter-class divergence matrix S in the training set are solved, and eigenvalue decomposition is performed on the S<W> and the S respectively, wherein the eigenvalue decomposition formulae are as follows: and ; D<alpha> is used for estimating , D<beta> is used for estimating , and the formulae and can be obtained; the column space W<1> of and the column space W<2> of are respectively solved, and the optimum projection space W=[W<1>,W<2>] of a feature extraction algorithm with two stages of LDA based on 2D-PCA is obtained; the low-dimensional image matrix in the first step is projected into the optimum projection space W, and then feature vectors of the images are obtained; classifier training is performed on the feature vectors obtained in the sixth step through an SVM+NDA model, and a final human face classifier is obtained.
Owner:ZHEJIANG UNIV

Post-tensioning prestress type self-centering steel frame structure

ActiveCN103924668AAvoid tensile crackingAvoid crackingShock proofingEngineeringSteel frame
The invention discloses a post-tensioning prestress type self-centering steel frame structure. The post-tensioning prestress type self-centering steel frame structure comprises at least one structural unit. Each structural unit comprises two steel frame columns, a T-shaped steel beam, a self-centering connecting piece and friction energy consumption parts, wherein the T-shaped steel beam is used for connecting the upper ends of the steel frame columns, the self-centering connecting piece is located on the lower side of the T-shaped steel beam and used for connecting the steel frame columns, and the friction energy consumption parts are located on the lower portion of the self-centering connecting piece. Each self-centering connecting piece comprises an inner sleeve, an outer sleeve, end plates, pretensioning rods and connectors, wherein the inner sleeve is sleeved with the outer sleeve, the end plates are located at the two ends of the sleeves, the pretensioning rods are arranged in the inner sleeve and anchored on the end plates, and the connectors are connected with the ends of the inner sleeve. Each friction energy consumption part comprises an inner friction plate, an outer friction plate and a friction gasket, wherein the inner friction plate is connected with the inner sleeve, the outer friction plate is connected with the lower side face of the outer sleeve, the friction gasket is arranged between the inner friction plate and the outer friction plate, and the sliding direction of the inner friction plate and the sliding direction of the outer friction plate are arranged in the axial direction of the outer sleeve. Column space is kept unchanged when the columns are laterally deformed, and the strength, the rigidity and the ductility of the structure can be flexibly and independently adjusted and controlled in the design process.
Owner:SOUTHEAST UNIV

Novel energy drawing-shock absorbing deep sea wind power generating floating type semi-submersible platform

PendingCN109441733AGuaranteed uptimeThe damping coefficient is continuously adjustableWind energy with electric storageWind motor supports/mountsFatigue damageEngineering
The invention relates to the field of offshore wind power generation, in particular to a novel energy drawing-shock absorbing deep sea wind power generating floating type semi-submersible platform. The novel energy drawing-shock absorbing deep sea wind power generating floating type semi-submersible platform comprises a draught fan blade, a draught fan, a tower barrel and a semi-submersible platform body; the semi-submersible platform body comprises three floating barrels and a triangular floating box; and a wave energy drawing-shock absorbing system is installed in the floating barrels and comprises a power generator, an inertia container, a return spring and a plurality of bearing springs. According to the semi-submersible platform, according to the sea condition or the actual requirement, by adjusting the load power of the power generator and the hydraulic oil flowing speed of the inertia container, influences on normal running of an upper draught fan by the vertical swinging, transverse rocking and longitudinal rocking freedom degree wave frequency response caused by wave loads and the problems of fatigue damage and the like are inhibited, and meanwhile, wave energy is converted into electric energy; and the energy drawing-shock absorbing system serves as a passive control system and fully utilizes the platform stand column space, the shock absorbing performance of the system is reliable, meanwhile, wind power generating and wave energy power generating are integrated, and the whole system has good economical efficiency.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY +1

Hanging mounting method of long heavy stay cable under space limited condition

The invention discloses a hanging mounting method of a long heavy stay cable under a space limited condition. The hanging mounting method comprises mounting of a first stay cable body on the center span side of a cable tower and a second stay cable body on the side span side of the cable tower and comprises the following steps of S10, tower end mounting of the first stay cable body; S20, beam end mounting of the first stay cable body; S30, tower end hard traction of the first stay cable body; S40, tower end mounting of the second stay cable body; S50, beam end mounting of the second stay cable body; and S60, synchronous different-place tensioning. A tower-first beam-second hanging manner is adopted in the stay cable bodies on the center span side and the side span side for hanging, and the problems that in the beam-tower end hanging scheme of the long heavy stay cable, during rear-tower-end hanging, traction force is too large, and safety is poor are solved. Meanwhile, beam end and tower end synchronous different-place tensioning is adopted, the problems that upper tower column space is small and narrow, and construction is difficult are solved, the phenomenon that when the stay cable bodies are tensioned each time, a set of tensioning extending rods are cut to be wasted is avoided, material waste is reduced, and the construction cost is reduced.
Owner:CHINA RAILWAY GUANGZHOU ENG GRP CO LTD +1

Multi-frequency narrow-beam antenna array and antenna

The invention provides a multi-frequency narrow-beam antenna array and an antenna, and relates to the technical field of mobile communication. The multi-frequency narrow-beam antenna array comprises four columns of high-frequency arrays, wherein any two columns of the high-frequency arrays are provided with combiners at the input ends of radiation units respectively; each combiner is used for separating frequency signals of two different frequency bands from the corresponding high-frequency array, and three different frequency bands exist in the frequency signals separated by the two columns of high-frequency arrays by the combiners, wherein the two columns of the high-frequency arrays are combined by the combiners to generate same-frequency-band frequency signals which are combined to form a first high-frequency narrow-beam array; and a second high-frequency narrow-beam array and a third high-frequency narrow-beam array are formed by combining the frequency signals of two different frequency bands generated in the combining mode with the two columns of high-frequency arrays without the combiner in a one-to-one mode. According to the multi-frequency narrow-beam antenna array provided by the invention, combining is performed firstly and then merging is carried out, and the high-frequency narrow-beam arrays can achieve excellent wave width convergence and excellent electrical performance by flexibly deploying the column spacing between two adjacent columns.
Owner:WUHAN HONGXIN TELECOMM TECH CO LTD

Continuous ion exchange technology for removing inorganic salt and adopted system

The invention discloses a continuous ion exchange technology for removing inorganic salt. The continuous ion exchange technology comprises the following steps: pumping raw materials into a resin column system in continuous moving through a raw material tank, wherein the resin column system is provided with a plurality of resin columns, the resin columns are sequentially arranged according to sequence numbers, the resin columns rotate along a number decreasing direction, every stepping is in two column space, the resin columns in even numbers are internally filled with cation resin and form a cation removing system, and the resin columns in odd numbers are internally filled with anion resin and form an anion removing system; enabling the raw materials to enter the resin column system through the cation removing system, then entering a buffer tank after cation removing, then pumping the raw materials into the anion removing system, and enabling feed liquid after anion removing to enter aproduct tank. The invention also discloses a system adopted by the continuous ion exchange technology. The continuous ion exchange technology disclosed by the invention can replace a traditional stationary bed technology, the purpose of efficiently applying resin can be achieved, the using amount of the resin, water and a reclaiming agent can be reduced, wastewater emission can be reduced, two different types of resin can be integrated into a set of system, and the technology is simplified.
Owner:SEPATEC ENVIRONMENTAL PROTECTION TECH XIAMEN

South-north facing alternation steel longeron home building house type with two units as combination

InactiveCN101196081AOptimize layoutEasy Access ArrangementDwelling buildingResidenceEngineering
The invention relates to a residential house type taking two houses as a combined north-south penetrated staggered steel truss, in particular to a residential house type. The house type is designed by adopting the multi-storey type house type, every two house types are taken as a standard unit body, a standard unit body comprises a column spacing bay room and an upper floor and a lower floor. On the plane of a house entrance floor, two house types are respectively entered into a house in the southward direction and the northward direction of a public inner corridor across the plane, and the public inner corridor is penetrated through the middle internode position of a truss frame in a staggered steel truss system; two house types reach the multiple stories of the two house types through two inner wall clinging to the east direction and the west direction and indoor spring layer stairs relative to the direction; one the multi-storey plane, two residential house types are arranged in parallel to be penetrated through the whole construction depth, and a north-south penetrated space is formed. The invention solves the problem of the north-south ventilation and the south light of the middle obstruction house type of the public inner corridor at the construction depth in the staggered steel truss residence through the design of the house type staggered and occlude transversely and longitudinally, to ensure the staggered steel truss residential house type to obtain the possibility of being widely applied.
Owner:TSINGHUA UNIV
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