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395 results about "Datum reference" patented technology

A datum reference or just datum is some important part of an object—such as a point, line, plane, hole, set of holes, or pair of surfaces—that serves as a reference in defining the geometry of the object and (often) in measuring aspects of the actual geometry to assess how closely they match with the nominal value, which may be an ideal, standard, average, or desired value. For example, on a car's wheel, the lug nut holes define a bolt circle that is a datum from which the location of the rim can be defined and measured. This matters because the hub and rim need to be concentric to within close limits (or else the wheel will not roll smoothly). The concept of datums is used in many fields, including carpentry, metalworking, needlework, geometric dimensioning and tolerancing (GD&T), aviation, surveying, and others.

Multi-disease chronic disease information management system

The present invention provides a multi-disease chronic disease information management system relating to the computer field and used for solving the problem that the conventional chronic disease management system can not realize the multi-department multi-disease same system management. The system provided by the present invention comprises a database, an application server, a plurality of hospital clients and a plurality of patient clients. The database stores the health examination data of patients, the doctor suggestion, the health data reference ranges of the examination items and the health state assessment indexes of various chronic diseases, and the application server obtains the health examination data of the appointed patient, the corresponding health data reference ranges, the health state assessment indexes of various chronic diseases and the doctor suggestion from the database according to a first query instruction sent by the hospital / patient client to obtain a chronic disease assessment result and return the chronic disease assessment result of the current appointed patient and the data to the hospital / patient client. By the above scheme, the communication interaction of the multiple medical departments and the patients about the multi-disease chronic disease is realized.
Owner:BEIJING SHIJITAN HOSPITAL CAPITAL MEDICAL UNIVERSTY

Aggregate structure identification and its application to program analysis

An efficient program analysis method is provided for lazily decomposing aggregates (such as records and arrays) into simpler components based on the access patterns specific to a given program. This process allows us both to identify implicit aggregate structure not evident from declarative information in the program, and to simplify the representation of declared aggregates when references are made only to a subset of their components. The method can be exploited to yield: (i) a fast type analysis method applicable to program maintenance applications (such as date usage inference for the Year 2000 problem); and (ii) an efficient method for atomization of aggregates. More specifically, aggregate atomization decomposes all of the data that can be manipulated by the program into a set of disjoint atoms such that each data reference can be modeled as one or more references to atoms without loss of semantic information. Aggregate atomization can be used to adapt program analyses and representations designed for scalar data to aggregate data. In particular, atomization can be used to build more precise versions of program representations such as SSA form or PDGs. Such representations can in turn yield more accurate results for problems such as program slicing. Our techniques are especially useful in weakly-typed languages such as Cobol (where a variable need not be declared as an aggregate to store an aggregate value) and in languages where references to statically-defined sub-ranges of data such as arrays or strings are allowed.
Owner:IBM CORP

Antenna phase center measuring method based on moving reference point

InactiveCN101320062AImprove test accuracyOvercoming the problem of poor measurement accuracyAntenna radiation diagramsAutomatic controlDesign phase
The invention discloses a method for measuring the phase center of an antenna, which is based on moving reference points. The method provided by the invention mainly solves the measuring problems of manual operation and artificial judgment. The method includes the following steps: in the measuring system, a measured antenna is adjusted to face an original antenna and is taken as the zero point of a measuring angle; the horizontal direction and the vertical direction of a two-dimensional translation device are controlled to reset and taken as the datum reference point of the phase center test; related parameter information is input and all moving shafts are controlled automatically, thereby collecting the amplitude and phase data of the measured antenna; the horizontal deviation and the longitudinal deviation of the phase center can be worked out by using the least square method and then can be determined whether the deviation of the phase center meets the deviation requirements of the designed phase center of the antenna; if not, the reference point of the antenna can be changed by automatically adjusting the horizontal coordinate and the vertical coordinate of the two-dimensional translation device according to the deviation value; the test can be repeated again and again until the horizontal deviation and the longitudinal deviation meet the requirements; and the final changed reference point can be taken as the phase center of the measured antenna. The method provided by the invention can automatically and accurately measure the phase center of an antenna.
Owner:XIDIAN UNIV

Method and device for conducting construction simulation on steel truss arch bridge through BIM

The invention relates to the technical field of bridge construction simulation, in particular to a method and device for conducting construction simulation on a steel truss arch bridge through a BIM. The simulation method includes the steps that a construction plan document of the steel truss arch bridge is input into system software, so that a construction plan operation file is acquired, the construction plan operation file is related to a construction model of the steel truss arch bridge, and a three-dimensional construction plan model including time, resources and plans is generated; according to the three-dimensional construction plan model and the design structure of the steel truss arch bridge, embedded section construction process simulation, closure section construction process simulation, on-arch upright construction process simulation and reinforced concrete beam construction process simulation are conducted on the steel truss arch bridge. By the adoption of the method and device for conducting construction simulation on the steel truss arch bridge through the BIM, the construction process of the steel truss arch bridge to be built can be simulated so that problems existing in the bridge construction process can be found in time, and data reference is provided for actual construction of the steel truss arch bridge.
Owner:CHINA RAILWAY ERJU 5TH ENG

New mean production control type threshing and redrying method

The invention discloses a new mean production control type threshing and redrying method, which comprises a raw material preparation process, a threshing process, a redrying process and a packaging process. A process for the near infrared online detection of chemical ingredient contents of tobacco leaves is added before the threshing and redrying and after the threshing and redrying respectively, and the online detection of a near infrared spectrometer cooperates with a computer control system before redrying and links with threshing and redrying equipment to form closed-loop control. In the invention, the addition of the near infrared online detection process before leaf redrying realizes the mean management of threshing and redrying line, eliminates the defect of the past threshing and redrying technique that the control indexes of inner quality are short, thus laying a good foundation for threshing and redrying enterprises to improve processing level and satisfying the requirements of cigarette processing enterprises. The addition of the near infrared online detection after redrying ensures that each box of products have labels of chemical ingredient content data, thus providing powerful data reference for tobacco alcoholization and cigarette prescription, and leading all jobs to have relatively accurate chemical index data as basis.
Owner:BAOFENG REDRYING FACTORY OF TIANCHANG INT TOBACCO CO LTD

Improved encephalic puncture guiding method and device

ActiveCN105054999APractical and convenient for clinical applicationReasonable designDiagnosticsSurgical needlesPoint registrationGyroscope
An improved encephalic puncture guiding method comprises the following steps of 1, puncture planning guidance, wherein 1.1, an encephalic scanning image sequence is loaded, a three-dimensional encephalic model is built, and meanwhile measurement angle correction data are loaded; 1.2, reference points are set, perpendicular reference planes are built in the three-dimensional model; 1.3, a target spot and an entry point are set, the length of a puncture path composed of the target spot and the entry point and the included angle between the puncture path and the reference planes are worked out; the final plan puncturing angle and depth are obtained by correcting the angle correction data; 2, puncture execution, wherein in the step 1.3, when an encephalic coordination system and a ground coordinate system are not consistent, the encephalic coordination system and the ground coordination system are registered by adopting the point registration method based on output data of a gyroscope, and the included angle between the reference planes and the puncture path obtained after registration is automatically worked out. The invention provides an improved encephalic puncture guiding device. The improved encephalic puncture guiding method and device are easy to implement and convenient to operate and facilitate clinical application.
Owner:ZHEJIANG UNIV OF TECH

Synchronous-rectification flyback switching power supply device and control method thereof

The invention relates to a synchronous-rectification flyback switching power supply device and a control method. The control method comprises the following steps of: in a first time interval, transferring energy from a primary side to a secondary side; in a second time interval, generating a feedback signal at the secondary side on the basis of the output load condition, transferring the feedback signal from the secondary side to the primary side, and generating a PWM (Pulse Width Modulation) control signal for controlling on/off action of a switching element at next switching period on the basis of the feedback signal at the first side. The invention provides a solution for high-efficiency isolation type AC (Alternating Current) to DC (Direct Current); and due to adoption of the scheme for time-shared control, the traditional and additional control signal transferring loop is not needed, so that the cost is reduced while ensuring high efficiency of a switching power supply. In addition, due to fewer adopted devices, the reliability is high; and since a datum reference voltage is introduced as the comparison basis in the process for processing sampling signals under the condition of the output load at the secondary side, the control accuracy is greatly improved.
Owner:SHENZHEN LOZEN POWER TECH

Distributed Cloud RTK location method and system thereof

The invention discloses a distributed Cloud RTK location method. The method comprises: selecting a settled reference station; setting a standard coordinate position and sending it to a centralized control center; distributing a cloud location resolving center that belongs to the settled reference station by the centralized control center; sending the observation data and the standard coordinate position to the cloud location resolving center by settled reference station; coarsely positioning and sending coarse positioning to centralized control center by a moving station; distributing a cloud location resolving center that belongs to the moving station by the centralized control center; obtaining the observation data and sending it to the cloud location resolving center by the moving station; coarsely positioning the moving station by the cloud location resolving center; selecting a datum reference station matched with the moving station; and precisely positioning to the moving station and sending precise positioning to the moving station by the cloud location resolving center. The invention also discloses the positioning system of the location method. The method and system have a high positioning accuracy, and realizes the large-scale localization solution from point to area. The data-processing pressure is low in large-scale applications.
Owner:湖南北云科技有限公司

Method for reasoning assembly tolerance standard and tolerance zone type of complex assembly body

The invention discloses a method for the reasoning assembly tolerance standard and tolerance zone type of a complex assembly body. The method comprises the following steps: (1) constructing a three-dimensional assembling model of a product; (2) splitting the assembling model; (3) establishing an assembly relation matrix between the components; (4) extracting assembly characteristic faces, and establishing a constraint relation matrix between the assembly characteristic faces; (5) reasoning the assembly constraint type; (6) reasoning the assembly tolerance types; (7) reasoning datum reference frames of the assembly characteristic faces; and (8) reasoning the set function of the tolerance zone, and determining the type of the tolerance zone. In the invention, a polychromatic set reasoning relation matrix is adopted to describe the whole reasoning process and is easily programmed, therefore, the method can be rapidly realized in a computer. The invention is established on the basis of the relation and constrain between the concrete assembly characteristic faces, can realize the practical design of the assembly tolerance, satisfies the requirements of Top-down design technique, conforms to the logical thinking habits of the designers, and has very strong applicability.
Owner:XI AN JIAOTONG UNIV

Multi-parameter acquiring and recording device for dynamically monitoring penile erection states

ActiveCN105011939AAccurately Inform Sexual Functional CapabilityDiagnostic recording/measuringSensorsPenisPosition angle
The invention belongs to the technical field of medical instruments, and particularly relates to a miniature multi-sensing technology based multi-parameter dynamic monitoring and recording device for penile erection states. The device is medical auxiliary monitoring equipment which combines a dynamic penile erection state sensing monitoring technology and a continuous data recording method and dynamically monitors change of multiple indexes such as biological impedance, penile position angles, axial penile pressure, penile blood flow and the like in the penile erection states. The monitor comprises a physiological parameter acquisition module, an embedded master control module as well as accessories such as a lead, a battery, an elastic fiber sleeve and the like. All the function modules coordinate with one another to work under the unified control of the master control module and acquire, process and record physiological information capable of reflecting various function states in penises of monitored patients in real time. The device can realize non-invasive, reliable and continuous monitoring of the penile erection states of the patients in real and natural sleep states and provide powerful and objective data reference for clinical assessment of male erectile dysfunctions.
Owner:成都瑞迪康医疗科技有限公司
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