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85results about How to "Reduce the difficulty of writing" patented technology

System and method for dynamically querying inheritance data of version

The invention provides a system and a method for dynamically querying the inheritance data of a version. The system comprises a type creating unit, a database creating unit, a database view creating unit, a real-time processing unit and a query unit, wherein the type creating unit classifies a plurality of data objects according to a version inheritance relationship of the plurality of data objects to generate a plurality of data types; the database creating unit generates corresponding database tables for the data object of each data type, wherein the database tables comprise the version data of the data objects; the database view creating unit generates a database view according to the version inheritance relationship; the real-time processing unit changes the corresponding database tables in real time during editing of the data objects to change the corresponding database views in real time; and the query unit generates query sentences which correspond to the database views and acquires the corresponding data objects by operating the query sentences. By adoption of the technical scheme of the invention, the data query performance of the type having a parent-child relationship can be effectively improved, and difficulty in writing of a structured query language (SQL) character string program for query by a developer is reduced.
Owner:YONYOU

Novel circularity error evaluation algorithm

The present invention belongs to the technical field of measurement tools, and especially relates to a novel circularity error evaluation algorithm. The algorithm takes a least-square center of a revolution body workpiece section as a reference point, a certain value (such as the least-square circularity error of the section or the estimated circularity error) is taken as a side length to construct a regular polygon, a plurality of vertexes of the regular polygon are orderly used as the centers to calculate the radius values from each vertex to all the measurement points, find out the maximumradius, the minimum radius and a range value of the radius when each vertex is the center and the corresponding center coordinate points are determined according to the definition of the circularity error evaluation algorithm (the minimum region method, the minimum circumscribed circle method and the maximum inscribed circle method) so as to obtain the required circularity error. The method is simple in principle and easy to implement and high in universality, circularity error evaluation software is easily installed on roundness measuring equipment, a coordinate measuring machine and other roundness precision measuring instruments with computers, the accurate evaluation of the circularity error can be met and the novel circularity error evaluation algorithm can be applied to the evaluation of other form and position errors in the practical engineering.
Owner:湖北爱默思智能检测装备有限公司

Method and device for constructing visual webpage information extracting rule

The invention discloses a method and a device for constructing a visual webpage information extracting rule. The method comprises the following steps: according to a webpage element selected by a user, obtaining parameter information of the webpage element by employing a webpage node analysis algorithm; according to the obtained parameter information of the webpage element, carrying out filling on configuration parameters required by corresponding webpage information extracting actions; and in a preset visual rule action management area, carrying out corresponding operations on the required webpage information extracting actions to generate the corresponding webpage information extracting rule. According to the method for constructing the visual webpage information extracting rule provided by the invention, not only is the analysis of the user on a webpage structure avoided, and the professional requirement of the user reduced, but the webpage information extracting action management convenient to operate is also provided for the user in the preset visual rule action management area; the difficulty of compilation and maintenance of the user on the webpage information extracting rule is greatly reduced; and the construction efficiency of the webpage information extracting rule is improved.
Owner:SURFILTER NETWORK TECH

Fiber grating directional pressure sensor, fiber grating preparation method and device

The invention is applicable to the technical field of optical fiber sensing, and provides a fiber grating directional pressure sensor, and a fiber grating preparation method and device; the fiber grating directional pressure sensor comprises a double-side hole optical fiber, a bearing plate, a stress plate and a spectrum analysis module, wherein the double-side hole optical fiber comprises an optical fiber cladding layer, an optical fiber core and two air holes, wherein the optical fiber core and the two air holes are arranged in the optical fiber cladding layer; the two air holes are locatedin the two ends of the optical fiber core, and a bragg grating with directionality is further written in the optical fiber core; the diameter of the air hole is larger than that of the optical fiber core, and the diameter of the air hole is smaller than the radius of the optical fiber cladding layer; the double-side hole optical fiber is used for accessing a measurement light beam and outputting atest light beam to the spectrum analysis module after the measurement light beam is refracted by the bragg grating; and the spectrum analysis module is used for demodulating the light spectrum of thetest light beam so as to obtain the value and the direction of the force applied to the stress plate. According to the fiber grating directional pressure sensor provided by the invention, the directionality is achieved, and the sensitivity can be improved on the premise of lowering the manufacturing difficulty.
Owner:SHENZHEN UNIV

Mixed signal detection experimental device suitable for mechanical and electrical engineering

The invention discloses a mixed signal detection experimental device suitable for mechanical and electrical engineering. The device comprises a main board, a power module, a liquid crystal display (LCD) module, a motor control module, a PSoC5 (programmable system on chip) microprocessor module and a STM32F4 (scanning tunneling microscope) microprocessor module; the power module is used for providing power source for every electrical module of the device; the main board is configured with a dual-microprocessor slot; the PSoC5 microprocessor slot in a left half area is used for connecting the PSoC5 microprocessor module, the STM32F4 microprocessor slot in a right half area is used for connecting the STM32F4 microprocessor module; input and output pins of the PSoC5 microprocessor module and the STM 32F4 microprocessor module can enable double rows of contact pins to be connect with external equipment of the main board through connecting leads; the main board is connected with a plurality of external equipment and externally arranged interfaces. By adopting a dual-processor framework, the unique configurable simulative digital property of the PSoC5 is combined with the high performance, the real-time function and the digital signal processing property of the STM32F4, so that the required functions for the electronic system design of the mechanical and electrical engineering are covered.
Owner:XUZHOU UNIV OF TECH
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