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818 results about "Proper time" patented technology

In relativity, proper time along a timelike world line is defined as the time as measured by a clock following that line. It is thus independent of coordinates, and is a Lorentz scalar. The proper time interval between two events on a world line is the change in proper time. This interval is the quantity of interest, since proper time itself is fixed only up to an arbitrary additive constant, namely the setting of the clock at some event along the world line. The proper time interval between two events depends not only on the events but also the world line connecting them, and hence on the motion of the clock between the events. It is expressed as an integral over the world line. An accelerated clock will measure a smaller elapsed time between two events than that measured by a non-accelerated (inertial) clock between the same two events. The twin paradox is an example of this effect.

Interactive virtual teacher system having intelligent error correction function

The invention discloses an interactive virtual teacher system having an intelligent error correction function, which is designed for solving the technical problem that the conventional man-machine interaction teaching is limited to speech synthesis information and spoken language evaluation and cannot satisfy the need for intelligent error collection interaction in learning and communication. Thesystem comprises an audio and video data acquisition module, an information identification module, an error correction evaluation module, a teaching policy module and other modules. An audio sensor and a video sensor acquire the face images and voice signals of learners; the information identifies fused mouth shapes, pronunciation and emotion of the learners; the error collection evaluation module automatically evaluates the pronunciation mouth shapes of the learners and detects the differences between pronunciation mouth shape data and standard data stored in a standard pronunciation mouth shape databases, automatically selects a proper time to show the reasons of incorrect pronunciation and correction means and provides a correct pronunciation mouth shape and animated demonstration; andthe teaching policy module makes a teach-student one-by-one interactive personalized teaching implementation solutions according to evaluation data and emotion states. In the invention, real-time communication and animated demonstration are realized by fusing voice and emotion multi-source information and by intelligent error correction and simulation by video interaction with a virtual teacher. Thus, the accuracy of pronunciation teaching is improved.
Owner:SHENYANG AEROSPACE UNIVERSITY

Method and system for inserting and transforming advertisement sign based on visual attention module

The invention discloses a method and a system for inserting and transforming an advertisement sign based on a visual attention module. The method comprises the following steps: firstly, predicting interest areas in various areas of each frame of video and the attention degree on each frame of a user on the basis of the constructed visual attention model; secondly, determining a time point for inserting an advertisement according to a curve of the attention degree on each frame of the user, evaluating the fitness degree of inserting the advertisement in the various areas on the basis of predicted attention distribution, further acquiring a sequence of candidate areas for inserting the advertisement, and inserting the advertisement in an area with little influence on video content; and finally, inserting the advertisement sign into proper time point and position according to the predicted attention distribution, and performing multiple feature transformation on the advertisement sign to make the advertisement sign attract the attention of users or audience repeatedly. The method and the system can effectively perform automatic insertion and transformation of the advertisement sign, and make the inserted advertisement sign attract the attention of people repeatedly in the condition of not influencing normal watching.
Owner:PEKING UNIV

Clinical trials management system and method

Clinical trials are defined, managed and evaluated according to an overall end-to-end system. The central authority creates protocol meta-models and makes them available to clinical trial protocol designers. Each meta-model includes a short list of preliminary patient eligibility attributes which are appropriate for a particular disease category. The protocol designer chooses the appropriate meta-model, and encodes the clinical trial protocol, including eligibility and patient workflow, within the selected meta-model. The resulting protocol database is stored together with databases of other protocols in a library of protocol databases. Sponsors and individual clinical sites have controlled access to the protocols. Study sites make reference to the pertinent protocol databases to which they have access in the protocol database library in order to perform patient eligibility screening. Once a patient is enrolled into a study, the protocol database indicates to the clinician what tasks are to be performed at each patient visit. These tasks can include both patient management tasks and data management tasks. The workflow graph advantageously also instructs the proper time for the clinician to obtain a patient's informed consent. The system reports patient progress to study sponsors, who can then monitor the progress of the trial, and to a central authority which can then generate performance metrics. Advantageously, a common controlled medical terminology database is used by all components of the system.
Owner:MEDIDATA SOLUTIONS

Method for constructing fully-digital GNSS compatible navigation receiver

The invention relates to a method for constructing a fully-digital GNSS compatible navigation receiver, which comprises four steps: I, constructing a receiving link in accordance with actual needs by taking the characteristics of satellite signals, performance indexes and current device level into comprehensive consideration; II, choosing a proper A/D chip and a proper time clock source to complete direct radio frequency sampling and constructing a sampling rate in accordance with bandwidth sampling requirements; III, constructing a filter decimation network to reduce the sampling rate, completing the down-conversion of the radio frequency, converting the frequency of the bandwidth satellite navigation signals near 1.2G and 1.5G two frequency points down to a low medium frequency under a condition of a high sampling rate, and finally outputting a sampling time clock and a GNSS medium frequency signal; and IV, constructing digital radio frequency front end and rear end medium frequencyreceiver interfaces for making the receiver compatible with other medium frequency receiver. The thought of using software radio realizes the collective receiving of full-range GNSS satellite navigation signals; and the medium frequency receivers can complete navigation solution and output measurement values, so multi-system and multi-frequency point compatible navigation is realized. The method has an application and development prospect in the technical field of communication.
Owner:BEIHANG UNIV

Method and system for displaying capacity remaining time of Bluetooth device based on Bluetooth terminal

The invention provides a method and a system for displaying capacity remaining time of a Bluetooth device based on a Bluetooth terminal. The method includes the steps: a, computing a remaining capacity value and periodically transmitting the remaining capacity value to the Bluetooth terminal by the aid of the Bluetooth device; b, computing and evaluating the service time of the remaining capacity of the Bluetooth device by summing up the remaining capacity value received within a period of time through the Bluetooth terminal; and c, displaying the service time of the remaining capacity on a screen by the aid of the Bluetooth terminal. Power consumption of the Bluetooth device in unit time can be evaluated by summing up capacity information acquired within a period of time through computing power of the Bluetooth terminal, the service time of the remaining capacity of the Bluetooth device is forecast based on the power consumption, a user using the Bluetooth device can know the remaining service time of the Bluetooth device by means of real-time display of the Bluetooth terminal, the user conveniently selects proper time for replacing a battery according to the remaining capacity, and use of the Bluetooth device is greatly facilitated for the user.
Owner:NUBIA TECHNOLOGY CO LTD

High-strength bolt axial force measuring device and measuring method

The invention discloses a high-strength bolt axial force measuring device and measuring method. The measuring device comprises a pull rod, an axial force sensor, a force providing part and a support; the close end of the pull rod is provided with a connecting part for being connected with a high-strength bolt thread end, and the close and far ends of the pull rod are provided with a first match part and a second match part respectively; the first match part is in match contact with the close end face of the axial force sensor, the second match part and the far end of the force providing part act in a match mode, the far end of the support is mounted between the force providing part and the axial force sensor, and the close end of the support is used for being supported on a part connected with a high-strength bolt; and the high-strength bolt axial force measuring device also comprises a strain measuring part arranged on a nut. The measuring method comprises the steps of (1) mounting the strain measuring part on the axial outer face of the nut; 2, connecting the pull rod with the thread end of the high-strength bolt in the match mode; and 3 starting the force providing part to read the value of the axial force sensor at proper time according to the changing condition of the stain measuring part. The high-strength bolt axial force measuring device and method are accurate in measuring by directly measuring the axial force of the high-strength bolt.
Owner:LONGYUAN BEIJING WIND POWER ENG TECH

Underground multi-stage intelligent high pressure gas pulse formation fracturing device and method thereof

The invention discloses an underground multi-stage intelligent high pressure gas pulse formation fracturing device and a method thereof, belongs to the technical field of fracturing completion of oil and gas wells, and particularly relates to two technical sachems of the device and the method. The method is used for fracturing the underground layer by the underground multi-stage intelligent high pressure gas pulse formation fracturing device. The device is controlled by each stage of intelligent pressure encoding detonator to gradually detonate by stages at proper time to generate a large amount of high pressure gas according to the set working mode, the dynamic high pressure pulse pressure is formed in the well or holes of a formation, the formation is fractured to form a plurality of cracks, and the permeability of fluid in the formation is increased, so the oil and gas are easily produced. The device and the method have the advantages that the cyclic multiple pressure pulses which are controlled at proper pressure can be generated, so the formation can generate the compression-expansion-compression alternating 'resonance', the cracks are promoted to effectively extend, and a new fracturing network is formed, so the permeability of the formation is improved; the pollution to the formation and environment in the fracturing process is avoided; the method is suitable for the water-sensitive and acid-sensitive formation; the construction cycle is short, the cost is low, the equipment is simple and convenient, and the limitation by terrain and water sources is avoided.
Owner:ZHONGBEI UNIV
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