790results about How to "Meet design needs" patented technology

The invention discloses a teaching management system based on MOOC (Massive Open Online Course) education and an implementation method. The system comprises a WEB and a client. The WEB comprises a WEB server and an application server. The WEB server is connected with the client, and is used for responding to requests on the client. The application server is connected with the WEB server, and is used for sending the teaching management logic to an application on the client through an application program interface API of a module. The client consists of a learning terminal and a teaching terminal. The learning terminal is used for acquiring the operation right of student users and then accessing the WEB. The teaching terminal is used for releasing courses and gathering statistics of courses of student users. The system further comprises a backend server used for storing teaching information, student information and teacher information uploaded via the client. Through the education and teaching management system based on massive open online course, the problem on unified management and optimized operation of the learning terminal and the teaching terminal is solved.

The invention discloses high-performance building structure refractory steel plates and a manufacturing method thereof. The high-performance building structure refractory steel plate comprises the following chemical components in percentage by weight: 0.02 to 0.12 percent of C, 0.05 to 0.50 percent of Si, 0.08 to 1.50 percent of Mn, 0.010 to 0.050 percent of Nb, 0.010 to 0.040 percent of Ti, 0.010 to 0.050 percent of Als, 0.20 to 0.60 percent of Cr, 0.20 to 0.40 percent of Mo, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, less than or equal to 0.0040 percent of N, less than or equal to 0.0020 percent of O and the balance of Fe and inevitable impurities. The production process of the high-performance building structure refractory steel plates is characterized in that: the steel blank heating temperature is 1,100 to 1,250 DEG C; the heating time is 60 to 110s/cm; two-stage controlled rolling is adopted; the final rolling temperature is kept between 800 and 900 DEG C; cooling is started 30 to 120 seconds later after final rolling; the final cooling temperature is kept between 500 and 750 DEG C; the steel plates are stacked quickly, cooled slowly and kept at a constant temperature; the stacking temperature is kept between 650 and 300 DEG C; and the temperature is kept for 10 to 24 hours. The plates have the characteristics of simple chemical components, low cost, and high refractability.

The present invention discloses a self-compacting concrete for CRTS III plate-type ballastless track filling layer. The concrete is prepared from the following raw materials in parts by weight: 270-350 parts of cement, 0-130 parts of coal fly ash, 0-120 parts of mineral powder, 20-50 parts of an expanding agent, 790-900 parts of fine aggregate, 750-900 parts of continuous gradation coarse aggregate, 20-40 parts specific viscosity modified materials, 5.5-8.5 parts of a specific sustained release controllable polycarboxylic acid water reducing agent and 165-180 parts of water. According to the invention, the specific viscosity modified materials and specific sustained release controllable polycarboxylic acid water reducing agent are used in combination to prepare the specific self-compacting concrete for filling layer with good flowability, strong volume stability, low sensitivity for water consumption, small thixotropic time change, low shrinkage and good longevity, thereby reducing theconstruction difficulty of the CRTS III plate-type filling layer and prolonging the sevice life of the ballastless track structure.

The invention relates to a disorder-storage low-power-consumption high-speed comparator which comprises an input sampling switch, a preamplifier, a coupling capacitor, a secondary preamplifier and an output dynamic latch in sequential connection. Auto-zeroed technology of disorder voltage storage is adopted on the basis of a conventional preamplifier latch comparator, and a novel low-power-consumption high-speed secondary preamplifier structure is realized by utilizing a phase inverter with power and voltage controlled; through average-current control technology, average power consumption is lowered while a high-speed high-gain level is provided. Therefore, comparator input disorder voltage is effectively decreased on the whole, speed of the comparator is greatly increased on the basis of not greatly increasing the power consumption, and designing needs of a high-speed data converter can be met better.

The invention relates to a multilayer compound eccentric-wear-preventing continuous sucker rod and a manufacturing device and a manufacturing method thereof. The sucker rod is characterized in that one section or several sections of the external surface of a fiber reinforced resin matrix composite rod body are respectively covered with a thermosetting wear layer; each thermosetting wear layer is made from one of polyurethane, a fluorocarbon coating, modified epoxide resin, vinylester resin, unsaturated polyester and phenolic resin; by adopting a manufacturing technology of multilayer composite winding and pultrusion or weaving and pultrusion, an internal layer of longitudinal fibers, an intertwining layer or a weaving layer and an external layer of longitudinal fibers are formed from interior to exterior in sequence; the manufactured rod body has a continuous length of 0-5000m. The sucker rod has the beneficial effects that the radial strength and the axial compressive strength are enhanced; the corrosion resistance and the eccentric wear resistance of the thermosetting wear layers are improved by 30%; the maximum temperature tolerance of the thermosetting wear layers is up to 190 DEG C; meanwhile, the bonding between an sucker rod body and each thermosetting wear layer is greater in length and quite high in strength, so that the slippage and the layering of an eccentric-wear-preventing layer from the surface of the sucker rod in the normal operation of an oil well are avoided.

The invention relates to a fibre reinforced composite anti-eccentric coiled rod and a preparation device thereof. The technical scheme adopted by the invention is as follows: one or more sections of the external surface of a fibre-reinforced resin matrix composite rod body is coated with a thermoplastic wear layer; the rod body is made of one of fibreglass, carbon fibre and basalt fibre; and a resin matrix is one of epoxy resin, urethane resin and vinyl ester resin. A plastic extruder and a cooling device are arranged between a draw gear and a winding device, the plastic extruder is used for coating one thermoplastic wear layer on one or more sections of the surface of a molded sucker rod, and then the cooling device is used for performing cooling treatment, so that the fibre reinforced composite anti-eccentric coiled rod is formed. The invention has the following beneficial effects: the coiled rod has excellent anticorrosion and anti-eccentric performances; the quantity of joints is greatly reduced; the breakage probability and the piston effect are reduced; and in addition, the production efficiency is high, and the operation is simple and convenient.

The invention provides a multi-die higher-order photonic switching structure based on a high-density memory in order to solve the problem of limited structure of a switching chip due to the bandwidthbottleneck of the memory of the conventional photonic switching structure. The structure is formed by mutual connection of K completely same photonic switching dies based on the high-density memoriesthrough an inter-chip interconnection network and includes N input/output ports, and each photonic switching die comprises N/K input ports, N/K electro-optical conversion modules, N/K separators, a storage input photonic switching network, an optical waveguide, a storage input buffer, a memory control logic, an inter-chip interconnection input output agent module, an inter-chip input buffer, an alternative selector, the high-density memory, a storage output buffer, a storage output photonic switching network, N/K photoelectric conversion modules, and N/K output ports, wherein K, N and k are all integers, 1<=k<=K, and K<=N. According to the structure, the complexity of the switching structure and the cost of optical devices are substantially reduced, and the order of the switching structureis further extended.

The invention discloses a method for designing a wireless power transmission device. The method comprises the following steps of: A, winding and installing a transmitting coil, a transmitting end amplifying coil, a receiving end amplifying coil and a receiving coil of the wireless power transmission device according to the design requirements and the given conditions; B, measuring electric parameters of the transmitting coil, the transmitting end amplifying coil, the receiving end amplifying coil and the receiving coil; C, establishing a multi-coil coupled wireless power transmission device system circuit model based on a mutual inductance model by using the actually measured electric parameters of the coils; D, setting an optimization object function and constraint conditions, and establishing a nonlinear programming model; E, solving a nonlinear programming problem to obtain a resonance compensation capacitance value; and F, configuring a capacitor according to the calculated resonance compensation capacitance value.

The present invention discloses a method and a system for immersion virtual maintenance simulation facing product maintenance verification. The method and the system analyze an actual maintenance taskand process of products to perform design of the immersion virtual maintenance simulation, a traditional digital model machine is subjected to model conversion and a series of processing and is led into a virtual maintenance scene to complete the construction work of the whole virtual maintenance scene, apply dynamic and physical constraints meeting the reality to an object in the scene, performmulti-channel rendering of the virtual maintenance scene, configure an interaction function, collect the user's motion data in the scene and complete the maintenance verification of the products. Themethod and the system for immersion virtual maintenance simulation facing product maintenance verification overcome the detects of traditional desktop virtual maintenance simulation and improve the efficiency and the authenticity of the virtual maintenance simulation.

The invention discloses a touch screen sensing component and a production method thereof. The production method includes the steps of printing a sheet of photosensitive conductive material on the side of a transparent electrode to obtain a photosensitive conductive sheet; and exposing the photosensitive conductive sheet to light under a photomask with a preset pattern, and developing to obtain an outgoing wire of the transparent electrode. The production method has the advantages that the outgoing wire is made of the photosensitive conductive material, the traditional printing is combined with exposure and development; and accordingly, fine lines are generated by the exposure and development, the complex process of metal film evaporation and etching and photoresist stripping is avoided, and the production cost of fine wires is reduced. The outgoing wires of the touch screen sensing component produced by the method are 30 micrometers/30 micrometers in wire width/wire spacing, and the touch screen sensing component meets the design requirement of market for narrow-frame touch screens.

A nonlinear multi-target range robust optimization based automobile noise reduction method comprises the steps of 1, conducting mathematical modeling for performance indexes, determining design variables of an automobile structure, determining a noise index at an observation point according to finite element calculation results, and establishing a multi-target optimization model; 2, describing all uncertain parameters of a system with ranges; 3, on the basis of range order relations and sensitivity analyses, conducting robustness processing of objective functions on the noise index; 4, on the basis of range possibility degrees, conducting feasible robustness conversion on constraint conditions; 5, converting a two-layer nesting optimization problem into a conventional single-layer optimization problem with an improved Taylor expansion method; and 6, solving the converted certainty multi-target optimization problem, and determining design values of all components of an automobile to achieve the optimal noise reduction effect. By the aid of the method, the automobile noise reduction problem containing range parameters can be solved systematically, the insensitivity to parameter fluctuations is improved, and the usage safety of the automobile structure and the stability of the noise reduction performance are improved.

This invention relates a microwave millimeter wave base sheet integration waveguide medium resonator antenna, which includes medium base sheet whose two faces are arranged with metal paster, on the metal paster there has integration waveguide, the waveguide is composed of at least two rows of metal through-holes, one face of the medium base sheet is arranged with inlet, and the inlet connects with one end of the integration waveguide, the other end of the integration waveguide connects with the metal through-hole in short circuit, the metal paster in the integration waveguide is arranged with the coupling window, on the coupling window there covers with medium resonator. The advantage in this invention is that the structure is simple, which is easy for designing; it has no parasitic radiation and exterior radiation, so it has lower wastage.

The invention provides an ultrasonic nonuniform flow nozzle and a design method thereof. The design method for the ultrasonic nonuniform flow nozzle comprises the following steps of: determining a subsonic speed section curve according to the diameter of an inlet of a subsonic speed section; determining a left characteristic line boundary and a right characteristic line boundary of an outlet dependence domain according to Mach number distribution of an outlet and a method of characteristics; determining an initial characteristic line from a throat; determining an equi-flow line of the nonuniform flow nozzle; and determining upper and lower wall curves by using the initial characteristic line and the equi-flow line according to conservation of mass and the method of characteristics. By thedesign method for the ultrasonic nonuniform flow nozzle, the ultrasonic nonuniform flow nozzle can be designed, so that the ultrasonic nonuniform flow nozzle generates the required nonuniform flow, and can continuously eliminate waves, eliminate or reduce centralized compression or expansion waves and ensure the quality of a flow field. According to the ultrasonic nonuniform flow nozzle, the design method for the ultrasonic nonuniform flow nozzle is used.

The invention provides a touch screen preparation method, which comprises the following steps of providing a conducting film of which the surface is provided with a patterned touch electrode; coating photoresist on the side, provided with the touch electrode, of the conducting film for forming a photoresist layer; exposing the photoresist layer through photomask with a preset pattern under illumination to obtain the exposed photoresist layer; developing the exposed photoresist layer, and obtaining a groove which is positioned at the edge of the touch electrode and is connected with the touch electrode from the photoresist layer; filling and solidifying conducting materials in the groove, and forming the conducting materials into the groove into a lead wire; removing the photoresist layer for exposing the lead wire. According to the touch screen preparation method, the photoresist layer is exposed and developed for generating the groove, and the conducting materials are filled into the groove for forming the lead wire, compared with a manner of directly printing a lead wire, the lead wire obtained by utilizing an exposure and development technology is finer in circuit, and the design requirements of narrow bezel touch screens are met.

The invention discloses a self-aligned gate structure nano field-effect transistor and a process for preparation, wherein one-dimensional semiconductor nano material is used as a conductive channel whose two ends are respectively provided with a source electrode and a drain electrode, a gate dielectric layer is growth through using the atomic layer deposition way to be covered between the source electrode and the drain electrode and on the side walls of the opposite surfaces of the source electrode and the drain electrode, on parts of the source electrode and the drain electrode, a gate electrode layer is growth on the gate dielectric layer through the evaporation or sputtering ways, the sum of the thicknesses of the gate dielectric layer and the gate electrode layer is smaller than the thicknesses of the source electrode and the drain electrode, and the gate electrode on the conductive channel between the source electrode and the drain electrode is electrically isolated from the source electrode and the drain electrode through the gate dielectric side walls. The self-aligned structure of the invention has simple and stable fabrication process and high freedom, greatly increases the control capability of a gate for the conductive channel as the conductive channel is basically covered by the gate electrode, and has no limitations for the materials of the gate dielectric layer and the gate electrode layer, thereby freely adjusting the threshold voltage of components, and meeting the design requirements of a scale integrated circuit.

The invention provides an annular supersonic velocity spray pipe and a design method thereof. The design method for the annular supersonic velocity spray pipe comprises the following steps of: predicting a flow field parameter in a transonic velocity segment area, and extracting an initial characteristic line from the flow field parameter; determining the mach number distribution of a supersonic velocity upright wall of the spray pipe according to design requirements; and determining a supersonic velocity curved wall molded surface of the spray pipe by a characteristic line method according to the initial characteristic line and the mach number distribution of the supersonic velocity upright wall. According to the design method for the annular supersonic velocity spray pipe, compression waves are not concentrated in a flow field of the designed annular supersonic velocity spray pipe, the distribution of the flow field parameter can be optimized according to actual application, and thequality of the flow field of the annular supersonic velocity spray pipe can be greatly improved. According to the annular supersonic velocity spray pipe, the design method for the annular supersonic velocity spray pipe is utilized.

The invention discloses a guiderail device and method for pouring a slope roof and relates to the technical field of building engineering construction. The guiderail device comprises plate-bottom steel reinforcing bars laid on the top surface of the form board of the slope roof. Plate-surface steel reinforcing bars opposite to the plate-bottom steel reinforcing bars are disposed above the plate-bottom steel reinforcing bars. A plurality of cushion blocks are disposed between the plate-bottom steel reinforcing bars and the form board of the slope roof. A plurality of horse stool steel reinforcing bars and a plurality rows of guiderail support steel reinforcing bars are disposed between the plate-bottom steel reinforcing bars and the plate-surface steel reinforcing bars. A guiderail steel reinforcing bar is fixedly connected to the top surface of each row of guiderail support steel reinforcing bars, and a steel wire mesh is fixedly connected to the bottom of the guiderail steel reinforcing bar. When the guiderail device is used for pouring, the plate-bottom steel reinforcing bars are laid first, the cushion blocks are placed between the plate-bottom steel reinforcing bars and the form board, then the horse stool steel reinforcing bars are fixed and the plate-surface steel reinforcing bars are laid, the guiderail support steel reinforcing bars are disposed and the guiderail steel reinforcing bars are laid, the steel wire meshes are mounted below the guiderail steel reinforcing bars, and finally concrete pouring can be performed. The guiderail device has the advantages that the guiderail device is easy in concrete pouring and dense in vibration, construction progress is accelerated, and construction cost is lowered.

The invention discloses a sidetrack horizontal well track design method under control point constraint condition. The sidetrack horizontal well track design method comprises the following steps: determining known parameters; modeling well tracks; setting a hole deviation angle and an azimuth angle at a control point; solving the parameters of key points in a model; sieving a well track with the shortest total length. According to the sidetrack horizontal well track design method under control point constraint condition provided by the invention, the design models of the well tracks are given out, the hole deviation angle and the azimuth angle at the control point in the well tracks are selectively adopted, thus the well direction of the track at the control point is optimized, and then the method of the whole track is optimized; the design method is simple, tentative calculation is not required, the track with shorter length can be designed by inputting known conditions of design, so that the method is beneficial to shortening the drilling period and reducing the drilling cost.

The application provides a camera lens, a camera module, and a terminal. The camera lens includes a first lens, a diffractive optical element, and a lens module along an optical axis from the object surface to the image surface; the surface of the first lens facing the object surface is a convex surface at the optical axis, and the surface facing the image surface is a concave surface, having a positive focal power; the diffractive optical element has a positive focal power and includes a surface facing the object surface, a surface facing the image surface, and a diffractive surface between the two surfaces, the surface facing the object surface is a convex surface at the optical axis, and the surface facing the image surface is a concave surface at the optical axis; the lens module includes N lenses, at least one of the surface facing the object surface and the surface facing the image surface of each of the N lenses is an aspheric surface, and the lens module has a positive focal power. The camera lens provided by the application can meet the requirements of miniaturization and high image quality, and meet the demand for size increase of the image sensor.