145 results about "Common view" patented technology

Effective real-time collaboration across remote sites in which any type of data can be shared in a common work space in a consistent manner is made possible by an annotation layer having multiple distinct modes of operation during a collaborative session with two or more people sharing the same work space. One mode is a discussion mode in which one or more users simply share a common view of the shared data and manipulate the view independent of the shared data. During the discussion mode, all user input is handled by the annotation layer which interprets user inputs to move common cursors, create, move or delete markings and text which, since the annotation layer is transparent, appear over the application. Another mode is an edit mode in which one or more users actually edit the shared data. The applications and the data are synchronized among all clients to display the same view. Manipulating the view includes moving a common cursor and placing markings on the common view using text and / or drawing tools.

Methods and systems are provided for presenting a plurality of shared calendars in a single electronic display frame or window where each of the plurality of shared calendars is displayed in a common view mode relative to other displayed shared calendars. Users may select one or more shared calendars to be displayed in the same display frame or window as their own calendar. Upon selection of a shared calendar to be displayed alongside a first calendar, an aggregate view object is called to control and coordinate all shared calendars selected for display in the common window or frame. The aggregate view object determines the view data object, including view mode (hourly, daily, weekly, monthly) and other calendar display settings of the first or active calendar displayed in the common view of shared calendars.

Embodiments of articles, apparatuses, devices and / or systems for manipulating hierarchical sets of data are disclosed. For example, in one embodiment, a method of transforming one or more trees to one or more corresponding symbol strings according to an association of trees and symbol strings is disclosed. In another embodiment, as another example, a method of transforming between at least a first and at least a second expression is disclosed in which the expressions have a common view that is other than one. Additional embodiments are also described.

The invention discloses a BDS / GPS high-accuracy positioning method, relating to the field of satellite navigation. The method includes establishing a virtual reference station, acquiring the common-view satellite ephemeris and the satellite observation data received by a reference station Bi and a roving station M, and acquiring the geometry distance between the satellite and the reference station Bi; acquiring the pseudo range correction number of the reference station Bi; interpolating the pseudo range correction number of the virtual reference station by means of an algorithm of inverse distance to a power; interpolating the pseudo range correction number of the roving station by the roving station by means of an algorithm of inverse distance to a power; correcting the satellite pseudo range observation data received by the roving station by means of the pseudo range correction number of the roving station; and establishing a roving station satellite pseudo range observation equation to obtain the accurate coordinate of the roving station to complete the positioning. According to the invention, the safety hidden troubles of information leakage of the reference station because a multi-reference difference positioning method in the prior art must use the accurate coordinate of the reference station can prevented, and high-accuracy positioning is obtained.

The invention relates to group purchase transaction method and system on an open network platform, relating to the technical fields of computer internet and electronic commerce based on internet. The invention provides a special three-stage group purchase transaction mode to effectively assist purchasers to achieve collective common views on acceptable good prices and other transaction conditions, an intention purchase period, an acquisition period and a check-out period are set for each group purchase offer of each product; the state of a group purchase order is modified in each stage according to the intention purchase quantity and the acquisition quantity of the purchasers to inform the purchasers and vendors; and the vendors are assisted to timely respond the demands of the purchasers according to the real time supply and demand condition of the market so as to promote the success of the group purchase. The open network group purchase transaction platform allows registered users to create a product list, and automatically generates a bulletin board system and an on-line chat room which specially serve for the product list to be used as a channel of communication and negotiation between the purchasers and the vendors and between the purchasers and the purchasers.

A method, apparatus and computer-usable medium for discovering groups of users that are distinguished by common views of on-line documents and content items. These common views are analyzed to recommend and facilitate introductions to potential corresponding parties and / or the formation of communities of interest. Users' interactions are logged for a specific task or time period according to predetermined scoping parameters. Accordingly, potential contacts relevant to a current task can be recommended as well as general contact recommendations relevant to interactions over a longer time period. Users can thereby find advisors or mentors for the current task they are performing as well as individuals they may want to contact in general.

A virtual sphere provided by an enhanced vision system includes synthetic imagery filling said virtual sphere and a common view window mapped to a dedicated position within the synthetic imagery. Imagery of the line of sight of a user is displayed in the common view window. By providing the common view window, visual communication between all users may be possible. By connecting a virtual user to the enhanced vision system and by displaying the imagery for the line of sight of the virtual user in the common view window, the workload of a human operator may be reduced and the time line of actions may be shortened. The enhanced vision system of the present invention may be used, but is not limited to, in a military aircraft to enhance the situational awareness of the flight crew.

The invention discloses a common view time and frequency transmitting method based on the BeiDou navigation satellite system. According to the common view time and frequency transmitting method based on the BeiDou navigation satellite system, the time difference between the local time and the time of all tracking satellites, clock difference parameters in navigation messages, the parameters of the time delay of the ionized stratum and the time delay of the troposphere and elevation angle data are measured and extracted through a timing type BeiDou receiver, and the clock differences between the local time and tracking BeiDou satellite clocks are worked out; the difference between the local time and the time of the BeiDou navigation satellite system is worked out through preprocessing of original data and weighting of elevation angles of all the tracking satellites; the time of the navigation satellite system is used as a medium, through the short message communication function of BeiDou-1, comparison results of two common view stations are exchanged, so that the time difference of the two stations is obtained, and the relative frequency difference between the two stations is worked out. By the adoption of the technical scheme, the dependence existing when GPS is used for transmitting time can be overcome, and accurate time transmission is achieved through the BeiDou navigation satellite system; high-cost hardware support is not needed, operation is easy, long-time automatic operation can be achieved, and therefore labor cost and use cost are greatly reduced.

Methods and systems for processing and displaying content are disclosed. An example method of operation may include initializing two or more windows on a mobile device, and displaying a first window of the two or more windows on the mobile device. The method may also include receiving an on-screen switcher indication causing a display view change from the first window being displayed to a combination of the first window and at least one more additional windows being displayed. The method may also include determining a space amount for each of the two or more windows, adjusting a size of each of the two or more windows based on the space amount. The method may further include displaying a frame around each of the two or more windows with the respective adjusted size, and displaying each frame overlaid on top of one another. The example method provides multiple web pages to be concurrently active in a common viewing area of a mobile display device.

According to one embodiment, a system includes a virtual tape library having a cache, a virtual tape controller (VTC) coupled to the virtual tape library, and an interface for coupling at least one host to the VTC. The cache is shared by all the hosts, and a common view of a cache state, a virtual library state, and a number of write requests pending is provided to all the hosts by the VTC. In another embodiment, a method includes receiving data from at least one host using a VTC, storing data received from all the hosts to a cache using the VTC, sending an alert to all the hosts when free space is low and entering into a warning state, sending another alert to all the hosts when free space is critically low and entering into a critical state while allowing previously mounted virtual drives to continue normally.

The invention belongs to the technical field of laser radar, and particularly relates to a multi-group laser radar external parameter calibration system and method. The system comprises a point cloudsegmentation module, a ground detection point cloud matching module, a map construction module, an information fusion module and a path optimization module. Multi-group laser radar external parametercalibration work can be completed by the following steps: calculating point motion relation between a front frame and a rear frame of eacg laser radar by using context information of the laser radar within a period of time; adding poses provided by IMU (Inertial Measurement Unit) to remove accumulated radar motion distortion; and constructing a scene map in an area. The multi-group laser radar external parameter calibration system can accept conditions of a certain degree of radar view shielding, small common view or no common view, and can fully utilize mutual information among multiple radars after the calibration is completed, thereby view blind area is reduced and the capability of detecting external environment is improved. Compared with a traditional manual or single-frame calibration method, the multi-group laser radar external parameter calibration method has the advantages of wide applicability, simple installation and great improvements on robustness and accuracy of a calibration result.

Embodiments of the present invention provide a three-dimensional reconstruction method. The method includes: creating an initial three-dimensional point cloud of the first image based on the first image and a first depth map corresponding to the first image; re-projecting the initial three-dimensional point cloud to a common view to obtain image coordinates, and judging whether the initial three-dimensional point cloud is visible in the common view; if the initial three-dimensional point cloud is visible in the common view, fusing the initial three-dimensional point cloud and the image coordinates to obtain a three-dimensional reconstruction model. The method of the invention optimizes the three-dimensional point cloud through the common view, and fuses the optimized three-dimensional point cloud and the initial three-position point cloud, thereby obtaining dense three-dimensional point cloud data for realizing the three-dimensional reconstruction with high accuracy, improving the accuracy of the three-dimensional reconstruction and reducing the cost of the three-dimensional reconstruction.

The invention discloses a digital slide real-time scanning automatic focus system and method. The system comprises an optical microscope device, a dispersion prism, a focus controller, a displacement controller, a first imaging device and a second imaging device, wherein the focus controller adjusts the first imaging device and the second imaging device so that the first imaging device and the second imaging device can have a common view field. The dispersion prism splits a light path from the common view field into a first light path and a second light path. The first imaging device receives the first light path and forms a first image, and the second imaging device receives the second light path and forms a second image. The displacement controller estimates the position of a focus face of the next view field according to focus factor analyzing results of the two images of the current view field, and controls an object stage or an object lens to move to the next view field, so that the object stage or the object lens moves to the focus face of the next view field. According to the scheme, the digital slide real-time scanning automatic focus system is well compatible with a traditional optical microscope device, and repeated development is needless. Besides, the digital slide real-time scanning automatic focus system and method can obtain the best focus face quickly, and the obtained focus face is high in precision.

The invention discloses a multi-camera internal and external parameter calibration method based on a three-point calibration object. The method comprises steps of S10, image point data acquisition; S20, every-two-camera internal and external parameter calibration; S30, multi-camera internal and external parameter calibration under a unified reference camera coordinate system; and S40, multi-camera internal and external parameter calibration under a designated world coordinate system. The method is advantaged in that a calibration tool is simple to make, limiting the calibration objects to move in a public view field of all the cameras is not needed, strong operability is realized, a multi-camera cascade path is determined through utilizing the common view field relationship, more image points participate into operation, and algorithm robustness is better.

The invention, which belongs to the technical field of high-precision time synchronization, particularly relates to a pseudo-range-assisted-carrier-phase-based beidou common-view time transmission method. The method comprises: users at two places obtain pseudo range and carrier phase observation data and broadcast messages by a beidou receiver and data exchanging is carried out by an internent network; a pseudo-code ranging common-view clock difference and a carrier wave common-view clock difference are calculated respectively by using a beidou common-view algorithm; and then a real-time clock difference of the two places is obtained based on least square fitting and vondrak filtering. According to the method, no cycle-slip detection and ambiguity resolution are carried out; and thus compared with the existing common view algorithm with the pure carrier phase, the provided method is simple and real-time in-station clock difference resolution at the sub-ns order can be realized.

Disclosed is a multi-view three-dimensional (3D) image display apparatus using a modified common viewing zone. The multi-view 3D image display apparatus may use a modified common viewing zone between a central viewing zone (common viewing zone) of the multi-view 3D image display apparatus and a central viewing zone (parallel viewing zone) of a 3D image display apparatus employing an integral photography method, or form a common viewing zone at an optimum viewing distance (OVD) of the multi-view 3D image display apparatus and use a modified common viewing zone in an area beyond the OVD.

The invention relates to a multi-station differential post-processing high-precision time synchronization method and a multi-station differential post-processing high-precision time synchronization system. The multi-station differential post-processing high-precision time synchronization system comprises satellite navigation receivers. Each satellite navigation receiver is mounted on a corresponding aircraft, satellite navigation signals can be received by the satellite navigation receivers, PPS (pulse per second) signals can be generated at generation moments T<A0> and T<B0>, baseband original observation information of the satellite navigation receivers and the generation moments T<A0> and T<B0> can be transmitted to data transmission systems, received baseband original observation information can be transmitted to a ground receiver system by the data transmission systems, and the aircrafts do not need to be communicated with one another; original observation information of the satellite navigation receivers on the multiple aircrafts can be simultaneously received by the ground receiver system and can be transmitted to a data processing system, resolving can be simultaneously carried out on the original observation information of the multiple satellite navigation receivers by the data processing system to obtain common-view satellites, PPS trigger time marks of each receivercan be corrected by means of relative differential calculation, and accordingly the time of multiple stations can be highly synchronized. The multi-station differential post-processing high-precisiontime synchronization method and the multi-station differential post-processing high-precision time synchronization system can be applied to the field of satellite navigation high-precision time service.

The invention discloses a verifiable and adjustable full synchronous communication network, and an implementation method thereof. The implementation method of the verifiable and adjustable full synchronous communication network comprises the steps: setting a time frequency standard system and a performance monitoring and evaluation system; comparing all the PRCs (Primary Reference Clock), LPRs (Local Primary Reference) and the like of the whole network respectively with the time frequency standard system in a common view satellite mode; according to the obtained clock error through common view comparison between the PRCs and LPRs and the time frequency standard system, calculating, processing and evaluating the technical performance in the performance monitoring and evaluation system; and adjusting the clock of each PRC and each LPR through the clock error so as to realize full synchronization of the communication synchronization network. The implementation method of the verifiable and adjustable full synchronous communication network belongs to a communication synchronization network full synchronizing method based on satellite common view, can establish a high accuracy time frequency measuring system, a synchronization performance evaluation system and a synchronous calibration system, can realize trusted verification and calibration of the synchronization performance quality, and can realize full synchronous operation of the full synchronous communication network based on the above capabilities.

The invention relates to a common view principle-based unilateral time transmission method. The method is characterized in that the common view principle and a virtual reference station principle are applied to the time transmission of a forwarding satellite navigation system, wherein the main reason for influencing the time transmission accuracy is ephemeris error and ionospheric additional time delay correction error when the tropospheric refraction time delay correction is performed at a client; and the ionospheric error and the ephemeris error are corrected by using virtual reference station technology and common view technology so as to realize the time transmission accuracy of 2ns. The invention provides the common view principle-based unilateral time transmission method, which can improve the time transmission method, improve the time transmission accuracy and provide time synchronization required for synchronously and precisely measuring the synchronization between ground stations of the satellite navigation system, between rail system external field stations and between time keeping laboratories.

The invention discloses a global navigation satellite system (GNSS) baseline solution reference satellite selecting method. The method mainly comprises the steps of establishing an inter-station difference single-difference model according to a GNSS carrier phase observation equation, and weakening influence from spatial correlation error; selecting a satellite according to base station and moving station common-view observation satellite list to construct a dual-difference model, resetting weight of each dual-difference observation value through an equivalent weight model based on an IGGIII model, and inhibiting influence from observation abnormity through a robust estimation model; calculating a variance inflation factor corresponding to each common-view satellite as a reference satellite according to the established dual-difference model; and calculating a VIF value to determine the reference satellite. The method, compared to an existing method, not only takes distribution structure of a spatial satellite into consideration but also focuses on quality of the observation value; therefore, the method can determine the most reasonable reference satellite and greatly improve both positioning accuracy and reliability.

The embodiment of the invention discloses an automatic exposure parameter calibrating method and device based on a double-camera system. The method comprises the steps of: respectively acquiring a first image and a second image of a target object on the basis of a first camera and a second camera; acquiring a common view field of the first camera and the second camera, and respectively carrying out statistics on a first brightness value and a second brightness value of pixel regions in the first image and the second image, which are positioned in the common view field; and regulating exposure parameters so as to enable the first brightness value and the second brightness value to be the same and respectively reach at least one preset target brightness value, and respectively recording exposure parameters of the first camera and the second camera, which corresponds to the preset target brightness value. According to the technical scheme of the embodiment of the invention, not only is inconsistency of brightness response of the first camera and the second camera in the double-camera system compensated, but also double-camera exposure is cooperatively controlled by utilizing a common statistic quantity of the images of the double-camera system, brightness consistency of the double-camera system is implemented.

Shared storage systems and methods are provided. A particular shared storage system is a system including multiple instances of shared storage. Each of the instances of shared storage includes data and file system metadata separated from the data. The file system metadata includes location data specifying storage location information related to the data. A persistent common view is provided of local and remote files, file systems, and services in the shared storage.

The invention discloses a multi-binocular camera motion calibration method based on a non-common-view area, and relates to the field of mobile robot vision SLAM. A device comprises two binocular cameras, a camera plane calibration plate and a control computer. The method is divided into three parts, firstly, the Zhang Zhengyou calibration method is used for obtaining the internal parameters, the external parameters and the distortion coefficients of two to-be-tested cameras, then the binocular camera conversion relation is calculated according to the common viewpoint seen after the binocular camera moves, and finally a graph optimization theory is used for optimizing a conversion matrix to finally obtain a high-precision calibration result. The method not only can be used for calibration calculation of the multi-binocular camera in the visual SLAM field, but also can be used in other visual measurement fields, is not limited to the number of the binocular cameras, and has the advantages of being simple in device, flexible and convenient to use, good in robustness, accurate and reliable in detection result and wide in application range.

The invention discloses a timing method by means of a navigation satellite, a device thereof and a computer-readable storage medium. The timing method comprises the steps of estimating a clock error optimal value of a reference station receiver according to the observed value of each satellite of a reference station and the coordinate of the reference station; according to the pseudo range observed quantity of the reference station and the estimated optimal value of the clock error of the reference station receiver, calculating a pseudo range correction item between the reference station and acommon-view satellite of a subscriber station; correcting the pseudo range observed quantity of the subscriber station by means of a calculated pseudo range error, measuring the clock error of the user station receiver by means of the corrected pseudo range of the subscriber station; and adjusting the local clock of the user station receiver by means of the calculated clock error of the subscriber station receiver. The timing method, the device thereof and the computer-readable storage medium have advantages of calculating the clock error of the subscriber station receiver by means of the pseudo range correction item between the reference station and the common-view satellite of the user station, effectively reducing influence of an ionosphere error to timing precision of the receiver, and improving timing precision of the subscriber station.

The invention relates to the technical field of timing, and specially relates to a high precision clock synchronization method for a timing system. The purpose is to solve the problems that the PTP (Precision Timing Protocol) timing precision is limited, and asymmetry introduces time deviation and multi-stage time difference accumulation. The high precision clock synchronization method comprises a master and a salve, wherein when a network is normal, the master and the slave measure an accurate clock skew and a clock delay through a timing method based on a PTP, slave time is corrected and satellite common-view is used to correct slave PTP time, thereby eliminating the effect of the asymmetry on the slave time synchronization; and when the network is abnormal, the master and the slave adopt the satellite common-view to perform time synchronization, thereby improving the synchronization precision of the slave and the master, and meanwhile, guaranteeing the time synchronization stability and accuracy of the slave and the master.

Time synchronization of two clocks is disclosed herein, such as two stationary clocks. A global time signal from a global time reference or common time source can be used to calculate a common view based clock offset between the two clocks. In parallel, a network based clock offset between the two clocks can be calculated based on messages exchanged over a communication network interconnecting the two clocks, without reverting to the global time reference. Two recent values (e.g., the two most recent values) of the common view clock offset and the network based clock offset can be combined or superposed in a seamless way to produce a final time offset estimate. The combination of independently calculated common view and network based clock offsets can be a weighted average of the two values, involving respective weights based on quality estimates of the latter. The time synchronization schemes based on a Global Positioning System (GPS) and a wide area communication network can be combined to synchronize the stationary clocks of phasor measurement units (PMUs) of a wide area monitoring system to a central server clock at a Network Control Center (NCC) of the system.

The invention relates to the technical field of computers and discloses a multicamera system and laser radar combined calibration method. A particularly generated calibration plate is used, as long as two adjacent cameras can simultaneously shoot a part of the calibration plate, the internal reference and the external reference of the multicamera can be solved, when the cameras of the multicamera system meet the requirement that two adjacent cameras can shoot the calibration plate at the same time, the calibration of the multicamera system can be completed, and the calibration of the multicamera system and the laser radar is completed in combination with the calibration of a single camera and the laser radar, thereby omitting the steps that the laser radar and the cameras are used for collecting data and selecting point cloud, simplifying the calibration step, saving the time and process for calibration on the premise of guaranteeing the precision, and solving the problem that the calibration of the multicamera system cannot be completed under the condition that the adjacent cameras do not have a common view field or the common view field is small.

The invention discloses a Beidou precise time service technology. According to the technology, the Beidou second-generation satellite navigation system is used for carrying out high-precision dual-machine common-view time service, thereby solving a problem of poor accuracy of time and frequency transmission in the communication field and the national defence building of our country. On the basis of utilization of the Beidou second-generation machine, GPS, and a dual-satellite four-frequency special-purpose time service receiver as well as a pseudo-range difference and a synchronous pseudo-range difference of a mobile radio station, a precise clock difference between two receives can be calculated, wherein the precision can achieve the nanosecond level; and the clock difference is used for fulfill the following tasks: (1), precise determination of deviation between the user clock and the standard time; and (2), realization of precise synchronization of the user clocks at different places.