110results about How to "Reduce design and development costs" patented technology

The invention aims at providing a gateway service middleware system and method as well as a device and system comprising the gateway service middleware system. The gateway service middleware system comprises a Java virtual machine, an OSGi (Open Service Gateway Initiative) frame module and a middleware module, wherein the middleware module is used for a service interface which provides control service for an intelligent household electrical appliance accessed into an intelligent home gateway, so that a user raises a service consumption request through the service interface. According to the invention, the design and development cost of the digital home gateway is reduced, the safety is improved and standards can be self-customized and uniformized.

The invention relates to a spot-welding connection failure value simulation system in the car bodywork manufacturing engineering field. In the invention, a circle-stress failure criterion generating module obtains nugget circle stress distribution form according to the failure mode of the spot-welding connection in a strike process to generate the circle stress failure criterion; a failure extreme value stress and an index-parameter obtaining module obtain welding-spot critical failure stress extreme values and dimensionless stress sub-item index initial values under the condition of the peak values of four exterior loads; four types of sample value models which are pulling-cutting, pulling-extending, pulling-bending and pulling-twisting are established in a welding-spot connection value simulation module; an explicit dynamics analysis module couples circle stress failure criteria and obtains the continuous distributed inner stress of a welding-spot unit model and an extreme value stress borne by the welding-spot unit during failure time by simulation; a welding-spot failure material databank module stores the critical failure stress extreme values and the dimensionless stress sub-item index initial values of each stress component. The system not only can enhance the impact simulation precision without impact on the calculation efficiency, but also can reduce the design and exploitation cost.

The invention discloses a 4U high-density storage server, and belongs to a server. The 4U high-density storage server structurally comprises a case, a power module, a main board, a fan region and a storage device region, wherein the power module, the main board, the fan region and the storage device region are arranged in the case, four storage nodes which can be plugged in a thermal mode serve as the storage device region, the storage nodes are communicated with the main board through an expanded controller and transmission cables, and each storage node is provided with twelve 3.5-inch hard disks which can be plugged in a thermal mode. Compared with the prior art, the 4U high-density storage server can support the forty-eight 3.5-inch hard disks and allow plugging operation to be conducted in the thermal mode, and high-density storage in the 4U server is achieved.

The invention belongs to the testability technology and relates to a built-in testing design method based on a relevance model. The method uses a product relevance model as a basis and comprises the following steps of: at first, simplifying the relevance model, and removing a redundancy test and combining an ambiguity group; secondly, identifying a minimum test vector matrix corresponding to each fault; thirdly, determining an optimal testing vector according to a reliability index and a test cost of a test as a criterion for fault detection and separation; and finally, converting the criterion into an embedded diagnostic program and arranging the embedded diagnostic program in a built-in test of a product. With the adoption of the method provided by the invention, a fault source can be accurately found out through the optimal test cost and the least test quantity, so that the testability and the design level of an electronic product can be improved.

The invention discloses a gas path fault diagnosis method and system for aeroengine dynamic process. The method includes the steps of establishing a feature extraction model based on a multi-layer kernel extreme learning machine; adopting a hidden Markov model based on time series modeling for fault identification. The method solves the problem that the conventional data-based engine fault diagnosis uses time series measurement data to diagnose the fault with low accuracy in the existing aeroengine gas path fault diagnosis in the dynamic process, is suitable for the engine dynamic fault diagnosis in consideration of the degradation of gas path components and the redundancy of sensor parameters, and has a positive promotion effect on engine health management and maintenance cost reduction.

The invention relates to an android system-based university attendance method which is technically characterized by comprising the following steps: selecting, by a teacher, a corresponding sign-in method during class, setting an unlocking password and starting an after-sign screen locking function; confirming a student group needing to sign in, and sending a notification to the student group; acquiring geographical position information of a sign-in person, and calculating distances between the sign-in person and the teacher, and if the distances between the sign-in person and the teacher are within a threshold value control range, indicating that the sign-in person is qualified for signing in; logging into a corresponding sign-in interface by students; clicking the 'Sign in' button, wherein if the unlocking password input by one sign-in person is correct, the lock can be unlocked, and signing in of the person is succeeded. The android system-based college attendance method disclosed bythe invention is reasonable in design; through the judgment of the distances between the teacher and the students during signing in and an after-sign screen locking technology, the phenomena of substitutive signature, false signature and playing cell phones in class of the students are effectively avoided; moreover, various sign-in modes are provided, so that the class utilization rate is greatlyincreased, and the improvement of the quality of university attendance management work can be guaranteed.

The invention relates to a distance measuring method in a camera monitoring system, belonging to the field of video monitoring. The method comprises the steps as follows: (1) shooting direction and optical zoom of the camera are adjusted so as to lead the present position and the taken area of the monitored object in the scene to meet the requirements of distance measuring; (2) focusing regulation is carried out on the monitored object so as to lead the image of the monitored object in the camera to be clearly focused; (3) zoom parameters and focus parameters of the camera are read out and the distance between the camera and the monitored object is calculated according to the parameters. The invention can realize the function of measuring the distance between the camera and the monitored object on the basis of the relationship among self-zooming, focusing and distance of a zoom-varying camera in shooting, thus saving the design and manufacturing costs of the camera monitoring system. The method is easy to use and widely applicable to camera monitoring systems employing zoom-vary cameras.

The present invention discloses a method for analyzing a crushing property of a composite material coated twelve-rectangular-cross-section thin-walled beam and aims to solve the problem that crushing property analysis of the thin-walled beam cannot be performed by using a finite element method or an experimental method due to a shortage of a geometrical model with a detailed structure in a conceptual design stage of crashworthiness of a car body. The method comprises the steps: 1, deducing an average crushing counter force analytic expression of a non composite material coated hollow twelve-rectangular thin-walled beam; 2, simplifying a stress-strain curve of a fiber reinforced composite material, i.e. in the stretching process, a stress-strain relationship is shown as linearity until the fiber reinforced composite material is broken, and in the compressing process, the stress is kept at a certain level without a change after yielding; 3, calculating a plastic limit bending moment and a limit yielding membrane stress of the fiber reinforced composite material coated twelve-rectangular-cross-section thin-walled beam; 4, correcting an effective crushing distance and a final folding angle of the fiber reinforced composite material coated twelve-rectangular-cross-section thin-walled beam; and 5, deducing the average crushing counter force analytic expression of the fiber reinforced composite material coated twelve-rectangular-cross-section thin-walled beam.

The invention discloses a method for verifying a single particle soft error protection design based on a heavy ion accelerator, and relates to the field of heavy ion and proton equivalent test verification of system single particle protection effect verification based on accelerator test data. The method includes the following steps: (1) adopting a ground accelerator heavy ion test which is determined on the basis of a LET value; (2) analyzing a proton static overturning cross section; (3) analyzing a sensitive bit factor of the system under any working mode; (4) analyzing a dynamic overturning cross section of the system under heavy ion radiation; (5) analyzing a dynamic overturning cross section of the system under proton radiation. The invention provides a method for verifying a single particle soft error protection design based on the heavy ion accelerator. The method can be intended for verifying single particle protection effects, and address the problems of tight time of domestic accelerators and difficulty in realizing high energy proton tests.

The invention discloses a vehicle-mounted non-blind-area positioning navigation and travel posture measuring device and a measuring method. The measuring device comprises a satellite positioning module, a magnetic resistance sensor, a tilt angle sensor, a CAN bus interface, a micro controller and an external input/output interface; the outputs of the satellite positioning module, the magnetic resistance sensor and the tilt sensor are connected with the input of the micro controller; the micro controller is in two-way connection with a whole-vehicle CAN bus through the CAN bus interface; the micro controller is in two-way connection with an external device through the external input/output interface. The measuring device has the benefits of no positioning blind area, low development and design cost and low maintenance cost.

The invention belongs to the field of finite element simulation of fiber reinforced composite materials, and relates to a refined modeling simulation method of a two-dimensional plain woven fiber reinforced composite material. The method comprises the following steps: (1) simplifying the microstructure of the two-dimensional plain woven composite material; (2) acquiring RVE geometric parameters; (3) establishing a geometric model; (4) setting section attributes; (5) determining performance parameters of the fiber tows; (6) setting a material model; (7) defining a load condition and a boundarycondition; (8) contact setting; (9) setting a control card and submitting calculation; according to the invention, the mechanical response and failure process of the fiber and the matrix of the fiberreinforced composite material can be simulated in more detail to obtain the microcosmic processes of interface cracking, fiber matrix damage and the like of the fiber reinforced composite material; accurate reference bases are provided for related structural design, the actual experiment frequency of researchers is reduced, the development period is shortened, and meanwhile the design and development cost is reduced.

The invention discloses an interaction control method, a reuse calling method andan interaction control system and a storage medium. The interaction control method comprises the steps: executing and displaying a current task event on a graphical user interface; checking a trigger operation for the current task event on the graphical user interface, and triggering to generate request information; obtaining template data corresponding to the temporary task event from a preset target file according to the request information, generating a floating window on the graphical user interface, and loading the template data in the floating window; in response to an editing operation of a user on the template data in the floating window, starting an edited temporary task event in a task flow of the current task event; and controlling to close the floating window to return to the graphical user interface where the current task event is located. According to the method, the temporary task event canbe conveniently inserted into the task flow of the current task event, the tedious operation of switching the task event in the past can be avoided, and the use experience of a user on the terminal equipment is improved.

The invention discloses a combined type hollow camshaft. The combined type hollow camshaft comprises a camshaft body, a combined type cam and a signal wheel, wherein the combined type cam and the signal wheel are arranged on the camshaft body. The combined type cam and the signal wheel are provided with assembly holes used for being formed in the camshaft body. The camshaft body is fixedly connected with a cam base circle part of the combined type cam and a tooth missing part of the signal wheel through pin structures. A machining process comprises the following steps that the hollow camshaft body is cast; a blind hole is machined in a corresponding shaft neck of a fastening cam on the camshaft body, a step hole corresponding to the blind hole in the camshaft body is machined in the combined type cam, and a cam rivet is pressed into the corresponding holes in the combined type cam and the camshaft body; a fixed hole is machined in the tooth missing part of the signal wheel, and a blind hole corresponding to the fixed hole is machined in the camshaft body; and a conical pin is pressed into the fixed hole of the signal wheel and the blind hole corresponding to the fixed hole. The machining process difficulty and cost are reduced.

The invention belongs to testability technologies, and relates to a digital-analog hybrid circuit BIT device based on boundary scan. The device is composed of a link scanning module, a boundary scan controller, a master controller, a test vector storage and a tested digital-analog hybrid circuit, the boundary scan controller and the master controller are needed in scan test execution, the test vector storage is loaded with test vectors, the device can achieve a BIT based on the boundary scan according to the characteristic of a digital-analog hybrid complex circuit, and therefore the test problem caused by the structure and cross link complexity of the digital-analog hybrid circuit can be effectively solved, and universal and reliable testability design is provided for the device. The fault detection and locating of the circuit can be facilitated, testing efficiency and reliability are improved, development and maintenance cost is lowered, and operational effectiveness and overall economic benefits are improved.

The invention provides an analysis method for collapsing force of two common steel rectangular-section thin-wall beams under a symmetric mode. The method comprises the steps that first, an average collapsing counter-force expression of rectangular-section thin-wall beams made of steel plates with the same material and the same thickness under a symmetric deformation mode is derived; second, average collapsing counter-force expressions of rectangular-section thin-wall beams made of two steel plates with different materials and different thicknesses, rectangular-section thin-wall beams made of two steel plates with different materials and the same thickness and rectangular-section thin-wall beams made of two steel plates with the same material and different thicknesses under two mixed formsare derived respectively; and engineering approximation is performed on the average collapsing force expressions solved in the second step under the three conditions. Through the method, under the condition that only dimension parameters and material characteristics are available, the collapsing performance of the two common steel mixed rectangular-section thin-wall beams is accurately predicted and analyzed, forward design of the thin-wall beam structure can be realized, simulation trial errors and experiment times are greatly reduced, the development cycle is shortened, and design cost is lowered.

The invention discloses a multiangle spectral sensitivity analysis method for a film system and application of the method. The analysis method comprises the following steps: performing initial film layer thickness setting according to a product performance constraint condition under the condition that a film layer sequence and a film layer optical constant are determined; establishing a film system admittance matrix model, and converting a substrate and the film layer sequence, the film layer optical constant and the initially set film layer thickness of each thin film into a characteristic matrix; calculating the transmittance and reflectivity spectrum data of the film system by virtue of the combined characteristic matrix of the substrate and each thin film. According to the method, a reasonable film system thickness design range is established according to comprehensive performance requirements of the product and a production condition, and a reasonable and accurate film system structure admittance matrix optical model is established; the product spectral and optical performance of the film system under different incident angle conditions can be rapidly analyzed to obtain a film system structure with minimal optical performance changes in case of angle changes by virtue of a genetic algorithm.

The invention discloses a fabricated light steel energy-dissipation wall with flat plate soft steel dampers and a connecting mode of the fabricated light steel energy-dissipation wall, and belongs tothe technical field of seismic reduction of structural engineering. The fabricated light steel energy-dissipation wall comprises a steel guide rail, combined edge vertical columns, a middle vertical column, wall face plates, the flat plate soft steel dampers, spacers, screw rods and nuts. The purpose is that the flat plate soft steel dampers which are convenient to mount mechanically, replaceableand applicable to a fabricated light steel wall body are additionally arranged in the fabricated light steel wall body, thus the fabricated light steel energy-dissipation wall with the high energy dissipation capability is formed, and the anti-seismic property of an overall structure system is improved.

The invention discloses a gravity self-adaption elevator for an LED television production line. The gravity self-adaption elevator for the LED television production line comprises two oppositely-arranged longitudinal supports, and a fixed friction board and a carrying platform which are located between the two longitudinal supports. Rolling grooves are formed in the opposite sides of the two longitudinal supports. The upper plane at one end of the carrying platform is connected with an elevating motor through a cable. The elevating motor is located above the carrying platform. The lower plane at the other end of the carrying platform is rotationally installed on a transverse rod. The two ends of the transverse rod are installed in the rolling grooves in a rolling manner. A herringbone friction supporting rod is rotationally installed in the middle of the transverse rod, a flat sliding board fixedly connected to one end of the herringbone friction supporting rod is limited in a rectangular groove in the lower plane of the carrying platform, and a sliding friction board fixedly connected to the other end of the herringbone friction supporting rod makes contact with a fixing friction board. By the adoption of the gravity self-adaption elevator, friction force, resistance and gravity are automatically matched and are adaptive, goods on the carrying platform descend at constant speed, and therefore the gravity self-adaption elevator has the beneficial effects of being capable of saving energy consumption and simple and reliable in structure.

The invention discloses a film system design of reducing an aberration generated because of observation angle changes and a manufacturing method thereof. The design method comprises the following steps of 1) according to a product performance integration requirement and a production condition, establishing a film system thickness reasonable design scope; 2) according to product performance, carrying out film layer initial setting, forming an initial value and establishing an admittance matrix optical model; and 3) using a genetic algorithm to analyze glass surface reflection spectrums and colors of the film system under different observation angle conditions and acquiring a film system structure which has a minimum aberration when the angle changes. In the invention, repeated product debugging and performance test processes are avoided; and a design result can be rapidly acquired, product performance is optimized, product design exploitation cost is reduced and a product exploitation period is shortened.

The invention belongs to the automobile passive safety research field, in particular to a composite material antisymmetrical wrapping square tube crushing characteristic analysis method, including thefollowing steps of 1 carrying out the structure description and coordinate definition; 2 calculating the ultimate stress and elastic modulus of the composites; 3 calculating the yield membrane forceand plastic limit moment per unit length; 4 calculating that energy dissipated by the superfold element in the composite material antisymmetrically wrapped square tube; 5 calculating that final effective crushing distance and the final fold angle; 6 calculating that average crushing force. The influence of the ply angle on the performance is taken into consideration, and the theoretical expressionof the plastic limit moment per unit length and the yield film force are obtained. The invention derives the analytical expression of the average crushing force of the composite material antisymmetrically wrapped square pipe, and obtains the relationship between the structural parameters and the crushing performance. By utilizing the method for analyzing the crushing characteristics of the composite antisymmetrical wrapped square pipe, the forward design can be carried out quickly, the number of simulation and experiments can be reduced, and the design cost can be reduced.

The invention provides a low-cycle fatigue life analysis method for a generator structure. The method is characterized by comprising the steps that 1, a cyclic stress-strain curve of a material is input into a finite element numerical simulation model of the generator structure, and strain components under a rated working condition, strain components under a static working condition, the equivalent stress under the rated working condition, the equivalent stress under the static working condition, first principal stress and third principal stress of all nodes of the generator structure are exported; 2, the strain amplitude and average stress are calculated; 3, the low-cycle fatigue life N of the generator structure at any node is calculated. The low-cycle fatigue life analysis method for the generator structure is suitable for various generator structures, precise in calculation, easy to operate and capable of achieving standardization of calculation methods and processes.