92results about How to "Achieve volume" patented technology

The invention relates to the field of inorganic materials, in particular to a high-specific-surface-area mesoporous graphite-phase carbon nitride material and a preparation method thereof. The graphite-phase carbon nitride material which is yellow powder is 5-28nm in pore diameter, 120-220m<2>/g in specific surface area and 0.4-0.7cm<3>/g in pore volume. The preparation method includes: dispersing guanidine hydrochloride solution on nano SiO2 microspheres or mesoporous silicon oxide materials, stirring, drying, calcining in an inert atmosphere, and removing a mould plate to obtain the mesoporous graphite-phase carbon nitride material. The raw material guanidine hydrochloride is low in cost and safe, the preparation method is simple, and the product is high in specific surface area. Further, adjustment of pore volume and specific surface area of the mesoporous graphite-phase carbon nitride material can be realized by adjusting usage of template agent.

The invention relates to an excavator bucket material volume and weight measuring system, which belongs to the technical field of hydraulic excavator bucket weighing, and comprises a laser radar, a calculating device, a preprocessing device and an operation display device. According to the invention, a laser radar device is used for realizing dynamic volume and weight measurement of materials in the bucket in the operation process of the excavator; effective three-dimensional modeling can be carried out on the empty bucket, point cloud registration fusion is carried out on the bucket filled with materials in the later excavation operation process, the limitation that point cloud data acquisition is blocked by objects and thus point cloud acquisition is incomplete is solved, the measurementprecision is improved, and the complexity of the measurement device is reduced.

The invention provides a nondestructive examination defect extraction and recognition method based on the ray attenuation energy field. Firstly, the relation between the negative image gray scale and the attenuation capacity field distribution is established based on ray detection and digital imaging; the defect boundary is acquired from the radiograph images; the types of the defects acquired by using the defect extraction method are recognized based on the ray attenuation energy field; finally, the defects acquired by using the recognition method of types of defects are volume measured according to the energy attenuation theory. The invention makes use of the attenuation characteristics expressed by the ray energy when the ray energy penetrates different materials to establish the principle of correspondence of the ray energy attenuation characteristics and the negative image gray scale, and makes use of the advantage of computers that the gray-scale image resolution of the computer outclasses that of human eyes, thus achieving automatic extraction, recognition and three-dimensional volume measurement of defects of components and parts of products.

The invention discloses an MR (magnetic resonance) image three-dimensional interactive segmenting method for random walks and graph cuts based active contour model, comprising the steps of S1, selecting a seed point to capture local three-dimensional MR image data including pituitary adenomas in order to acquire a segmented initial boundary surface; S2, establishing a hybrid active contour model based on the initial boundary surface to obtain a model energy function; S3, discretizing the model energy function; S4, using each pixel of the captured local three-dimensional MR image as an image node, and using 6 neighborhoods of each pixel to construct an image; giving an initial value to each of the pixels inside and outside the initial boundary surface; giving a corresponding weight to each of sides connecting between the nodes, between the nodes and source points and between the nodes and meeting points according to the discretized energy function; S5, performing image segmentation computing based on the constructed mage to obtain segmentation results, and extracting boundary surface form the segmentation results to obtain a segmented contour; S6, replacing the initial boundary surface of S1 with the current segmented contour, and repeating the steps S2 to S5 until the segmentation results converge to obtain a final segmented contour. By using the method of the invention, it is possible to provide three-dimensional segmentation for MR images of pituitary adenomas, and provide more accurate segmentation for the images of pituitary adenomas.

The invention belongs to the field of inorganic materials and particularly relates to a preparation method of a mesoporous graphite phase carbon nitride material with a high specific surface. The aperture of the mesoporous graphite phase carbon nitride material is 3.7-4.5nm, the specific surface is 540-796m<2>/g, the pore volume is 0.5-0.7cm<3>/g and the material is black powder. The preparation method comprises the following steps: immersing a mesoporous SBA-15 or MCF material in an urotropin aqueous solution; stirring; centrifugalizing; roasting under an inert atmosphere; removing a silicon oxide template by HF; drying in vacuum to obtain the mesoporous graphite phase carbon nitride material. The method is low raw material price, safe and convenient to prepare, and the product obtained is high. The use level of the template is adjusted to adjust the specific surface and the pore volume of the mesoporous graphite phase carbon nitride material.

The invention discloses a channel equipment automatic test device and system. The device comprises an interface adapter and a channel equipment automatic tester with a universal tester interface. The channel equipment automatic tester comprises a master control board, a digital intermediate frequency board, an audio board, a radio frequency board, a directional coupling module, a display input module and a self-powered module. The system comprises a calibration subsystem, test, plan and edit subsystems, a quality management subsystem and the channel equipment automatic test device. Through adoption of the channel equipment automatic tester matching the interface adapter, a test can be carried out on test site through simple connection. Through adoption of a digital processing method, the analog devices are greatly reduced. The whole system is small in size and is convenient to carry.

The invention discloses an integrated electric lifting, stabilization and rotation turntable device. The integrated electric lifting, stabilization and rotation turntable device comprises a lifting mechanism, a stabilizing mechanism, a rotating mechanism and a box body mounted on the lifting mechanism; the rotating mechanism includes an azimuth shaft and a pitching shaft, wherein the upper end of the azimuth shaft extends out from the opening of the box body; the upper end of the azimuth shaft is provided with the pitching shaft and a driving motor through a pitching shaft mounting seat; a frame body is arranged between the shell of the azimuth shaft and the opening at the upper surface of the box body; four horizontal adjustment shafts which are separated out from each other by 90 degrees are arranged between the frame body and the shell of the azimuth shaft; a horizontal rocking shaft and a vertical rocking shaft of the stabilizing mechanism are mounted in the box body and are connected with respective driving motors; the horizontal rocking shaft driving motor is mounted on the vertical rocking shaft through a mounting seat; the horizontal rocking shaft is connected with the shell of the azimuth shaft through a connecting component. According to the integrated electric lifting, stabilization and rotation turntable device of the invention, an embedded whole frame structure is adopted, and therefore, the bearing capacity of the device can be improved, the self weight of the device can be decreased, and the operating height of the device can be decrease, and the extension length of the device can be increased, and the size and weight of the product can be small.

A preparative circulating chromatography apparatus can be applied in chromatographic separation preparation of target components in a complex sample and is mainly advantaged in that: (1) with pre-treatment and concentration of an on-line sample, large-volume sampling on the premise of a high column efficiency can be achieved; (2) through position exchange between a separation column and a trapping column, circulating separation and purification of the target components are achieved and the preparative circulating chromatography apparatus is less in circulating dead volume and column efficiency loss; and (3) through concentration-elution of a finish product through the trapping column, a separation-concentration integrated process is achieved, wherein the three functions are achieved through adjustment of an adsorption performance of the trapping column and valve exchange. Compared with a conventional preparative chromatography method, the apparatus has significant advantages on separations of natural products, drugs and chemical products, especially on separation and preparation of micro-scale targeted components and unstable components in a mixture.

The invention provides an electromechanical servo comprehensive control and energy source management device, which is used for servo motor control and energy source management, and comprises a microprocessing circuit, detecting circuits, a signal conversion circuit, an isolation driving amplifying circuit and an energy source management circuit, wherein the detecting circuits comprise a first voltage detecting circuit, a first current detecting circuit, a second voltage detecting circuit and a second current detecting circuit. The electromechanical servo comprehensive control and energy source management device provided by the invention has the advantages that the comprehensive management of absorption and release of energy sources can be realized, in addition, the system composition is simplified, the system weight is reduced, and meanwhile, the self test of an electromechanical servo system can be realized.

The invention discloses a two-freedom-degree hybrid stepping motor for bionic eyeballs of a robot. The stepping motor comprises a first freedom degree motor, a second freedom degree motor and output shafts, wherein the first freedom degree motor is of a circular structure with a notch, the second freedom degree motor is of a circular structure with an opening, the notch is matched with the opening, and the planes of the two motors are perpendicularly orthogonal; the first freedom degree motor and the second freedom degree motor both comprise stators and rotors, the stators and the rotors can relatively move in the planes of the motors, and the two-freedom-degree movement of the output shaft of one freedom degree motor can be achieved through respective independent movement of the two freedom degree motors. The two-freedom-degree hybrid stepping motor has the advantages of being simple in structure and manufacture technology, convenient in analysis design, high in mechanical integration level, high in open-loop operation location accuracy, easy in performance experiment test and favorable for shortening the development period of products and improving the performance and the competitiveness of the products.

A sintering chamber structure adapted to store multiple articles to be sintered in a sintering furnace, includes a first wall, a second wall, two side walls interconnecting the first and second walls, at least two supporting walls, and holding boards for holding the multiple articles. The two side walls and the first and second walls together define a storage space communicating outside. The two supporting walls correspondingly form a plurality of guiding grooves, wherein the first and second walls correspondingly form a pair of positioning slots communicating with the storage space, the at least two supporting walls are detachably inserted in the pairs of positioning slots, respectively, and the holding boards are inserted in corresponding guiding grooves. In this manner, the at least two supporting walls can adjust the inner space according to the sizes of the articles, whereby achieving the best yield of sintering.

The invention is suitable for the field of mobile terminals and provides a mobile phone and an antenna thereof. The antenna comprises a first antenna radiating body, a second antenna radiating body, a third antenna radiating body, a feed end, a complete machine metal arm and lumped parameter elements. The first end of the first antenna radiating body is connected with the feed end. A gap is formed between the first end of the second antenna radiating body and the first end of the third antenna radiating body. The second end of the first antenna radiating body and the second end of the second antenna radiating body are connected through the one or more lumped parameter elements. The second end of the third antenna radiating body and the complete machine metal arm are connected through the one or more lumped parameter elements. The antenna is simple in whole structure, convenient to produce and manufacture and small in size.

The invention discloses a bionic hierarchy-based mechanical metamaterial annular lattice structure, which comprises a single-layer annular lattice structure and a double-layer annular lattice structure, each annular lattice structure consists of M * N * P annular structure units which are respectively arranged in an array along the X, Y and Z directions, M is greater than or equal to 1, N is greater than or equal to 1, and P is greater than or equal to 1; each single-layer annular structure unit comprises two elliptical rings which are perpendicular to each other along the diagonal edges of the cube; each double-layer annular structure unit comprises two oval rings perpendicular to each other along the diagonal edges of the cube and two inner oval rings arranged in the two oval rings. By introducing the biologically inspired annular design, the structure not only has the characteristics of light weight, high strength, high rigidity, excellent energy absorption performance and the like, but also can realize the full utilization of the structural space and the great improvement of the mechanical performance. The problems that an existing traditional artificial material structure is poor in mechanical performance, the grading mechanism is single, and obvious defects exist in the internal structure design are solved.

The invention discloses a method for generating emulsion in a micro-channel. The method comprises the following steps: a, forming the micro-channel in the surface of a first piece of polydimethylsiloxane; b, sticking the first piece of polydimethylsiloxane with a second flat piece of polydimethylsiloxane together; c, vertically putting a laser device on one side of the second piece of polydimethylsiloxane; d, respectively injecting inner-layer liquid and outer-layer liquid of the emulsion from inlet ends of an emulsification inlet channel and an emulsion forming channel; e, starting the laser device so that the laser device is used for heating an outlet end of the primary emulsification inlet channel; and f, forming emulsion drops in the emulsion forming channel, and pushing the emulsion drops by liquid to a liquid outlet hole. According to the method, the emulsion is generated by adopting the double channels which are vertical to each other; and the laser device is used for heating so that the changes of emulsion size, generation speed and frequency, dispersity and the like are realized.

The invention relates to an ultrafine diamond grinding wheel and a preparation method thereof. The preparation method comprises the following steps: (1) dissolving acrylamide and N,N'-methylenebisacrylamide into water to obtain a premixed liquid; (2) mixing a dispersing agent, a plasticizer, a modifier, a defoaming agent and the premixed liquid to obtain a basic mixed liquid; (3) mixing an abrasive material and a glass binder to obtain powder; (4) mixing the powder and the basic mixed liquid, performing grinding, and performing degassing to obtain an abrasive material slurry; (5) adding a curing agent solution into the abrasive material slurry, performing uniform stirring, injecting the stirred material into a mold for curing, performing demoulding, and performing drying to obtain a greenbody of the grinding wheel; and (6) roasting the green body of the grinding wheel to obtain the ultrafine diamond grinding wheel. The ultrafine diamond grinding wheel provided by the invention can realize high-efficiency, ultra-smoothness, low-damage grinding and polishing processing of zirconium oxide core-insertion products, and has a uniform structure, high processing efficiency, and low abrasion consumption.

The invention discloses a geometric constraint calculation technology suitable for free deformation parameterization. The geometric constraint calculation technology comprises an intersection point calculation method for intersection of a space passing point Op and a geometric appearance curved surface in the set direction, a thickness constraint calculation method and system applying the intersection point calculation method, and a volume constraint calculation method and system applying the intersection point calculation method. The intersection point calculation method comprises the following steps of: 1, performing triangular gridding on an initial geometric appearance curved surface, and converting the initial geometric appearance curved surface into a discrete curved surface consisting of a plurality of triangular planes; 2, calculating a coordinate of an intersection point O'p of a space passing point Op and a triangular plane in the discrete curved surface in a Cartesian coordinate system along a set direction; 3, constructing a B-spline-based FFD control body for the geometric shape curved surface, embedding the intersection point O'p into the FFD control body, and performing FFD control on the geometric shape curved surface; and calculating the parameterized local coordinates of the intersection point O'p in the FFD control body. The method can efficiently calculate the local coordinates of the intersection point of the spatial point and the geometric profile curved surface in the FFD control body along the set direction, and realizes the calculation of geometric constraints under free deformation parameterization.

The invention discloses a satellite-borne dual-band four-channel rotary joint which comprises a first single-waveguide rotor, a first dual-waveguide stator, a dual-waveguide rotor, a second dual-waveguide stator and a second single-waveguide rotor. The first single-waveguide rotor, the double-waveguide rotor and the second single-waveguide rotor are rotors, and the first double-waveguide stator and the second double-waveguide stator are stators; the first double-waveguide stator is arranged between the first single-waveguide rotor and the double-waveguide rotor and is supported and connected through a bearing, the second double-waveguide stator is arranged between the second single-waveguide rotor and the double-waveguide rotor and is supported and connected through a bearing, and the rotors and the stators can rotate relatively. The dual-band four-channel rotary joint is a Ka-high-band four-channel rotary joint and a K-high-band four-channel rotary joint and has the advantages of being high in working frequency and large in number of channels, the channels are independent of one another due to the concentric stacking structure, and the requirement for high isolation between the channels is met.

The invention discloses a grain impurity content detection method, which comprises the following steps of: acquiring two-dimensional slice images of a sample at different scanning angles by adopting cone beam CT (Computed Tomography), deducing the relationship between grain grain and impurity density and an X-ray absorption coefficient, and reconstructing a doped grain three-dimensional CT image according to the relationship; on the basis, establishing a region growth model based on a gray value to realize contour extraction and volume calculation of the grain seeds; and finally, introducing the stacking density of the impurities to realize rapid calculation of the grain impurity content. According to the method, the content of the impurities in the grains is detected by utilizing the cone beam CT technology for the first time, the sample is not damaged, the primitiveness of the sample is reserved, the volume of the impurities is calculated by utilizing a voxel point statistical method, and the proportion of the impurities is measured through the mass occupancy of the impurities, so that the content of the impurities in the grains is rapidly calculated.

The embodiment of the invention discloses a fluorescence excitation block light source and a fluorescence microscope. The light source comprises a light source identification driving module and at least one fluorescence excitation module, the fluorescence excitation module comprises a light-emitting element and a condensing lens, and the light-emitting element is used for emitting an excitation light beam; the condensing lens is used for condensing the excitation light beam to form a condensed light beam; the condensed light beam is used for exciting the to-be-detected sample to generate fluorescence; the fluorescence excitation module further comprises a shell, the light-emitting element is arranged at a first light transmitting opening, and the condensing lens is arranged in the shell. The excitation light beam enters the shell through the first light transmitting opening, the fluorescence condensation light beam enters a to-be-detected sample through a second light transmitting opening, and the fluorescence light beam carrying the characteristics of the to-be-detected sample is emitted through the second light transmitting opening and a third light transmitting opening in sequence; the light source identification driving module is electrically connected with the light-emitting element and used for controlling the light-emitting element to emit excitation light beams. The problems that in the prior art, a fluorescent light source is large in size, high in cost, large in optical loss and inconvenient to adjust optical power are solved.

The invention relates to an unmanned aerial vehicle tilt turning method adopting a non-minimum phase corrector. Firstly, an expected mass center position signal of lateral movement is set according toa flight mission, a GINS100 type MEMS sensor is installed, the roll angle and the lateral acceleration of the aircraft are measured, and a lateral speed and a position signal are obtained through integration. A position error signal, an integral signal and a speed signal are superposed to obtain a position comprehensive signal, a non-minimum phase corrector is designed to obtain a roll angle expected signal, the roll angle expected signal is compared with a roll angle measurement signal to obtain a roll angle error signal, and non-linear integration and filtering differential calculation is carried out to form a comprehensive control signal of a roll channel, and tilt turning of the unmanned aerial vehicle is achieved in the uncontrolled state of a yawing channel. The method has the advantages that the non-minimum phase reverse motion characteristic of lateral motion is eliminated, so that the turning has good dynamic performance.

The invention relates to the field of optics, in particular to a zoom lens and an imaging device. The zoom lens is sequentially composed of a first lens group with positive focal power, a second lens group with negative focal power, a diaphragm, a third lens group with positive focal power, a fourth lens group and a fifth lens group with positive focal power from an object plane side to an image plane side. The second lens group, the fourth lens group and the fifth lens group move in the main optical axis direction of the zoom lens; the fourth lens group sequentially comprises a positive focal power lens and a negative focal power lens from the object plane side to the image plane side; the zoom lens satisfies the following conditional expressions: ft is greater than 175 mm; tTL is less than 135 mm; wherein ft is the focal length of the zoom lens in the telescopic state, and TTL is the total optical length of the zoom lens. Through the limitation of the structure and the parameters, the number of the lenses in the zoom lens is small under the condition that the resolving power basis is realized, and the functions of small size and ultra-long focus of the zoom lens are realized.