53 results about "Coverage space" patented technology

A surveillance system and methods are disclosed. The system of the invention includes computing means connected to memory means, input means and a plurality of sensors, such as video camera and plurality of display screens. The system is adapted to compute for the sensors a 3D coverage space which considers terrain data and man-made objects and specific features of the sensors such as the 3D location and the pan, tilt and zoom (PTZ) of the camera and to establish a data base indicative of the coverage area. The system and method of the invention are also adapted to support tracking of an object within the coverage space of the sensors, either in automatic or manual mode and to provide a user of the system with data indicative of sensors into the coverage space of which a tracked object is about to enter.

Functional coverage techniques during design verification using cross-product coverage models and hole analysis are enhanced by the use of coverage queries. After running a test suite, a core set of non-covered events is specified. A coverage query is then automatically constructed and executed on the test results to identify a hole in the functional coverage that satisfies conditions of the coverage query and includes the core set. The results of the query are presented as a simplified view of the coverage of the events in the cross-product space. Use of coverage queries allows a verification team to focus on specific areas of interest in the coverage space and to deal practically with highly complex coverage models. It also avoids the burden of producing and evaluating complete hole analysis reports.

The invention relates to a method for remotely sensing and quantitatively monitoring steppe vegetation coverage space-time dynamic change based on normalized difference vegetation index (NDVI) data, and belongs to the technical field of vegetation coverage dynamic remote sensing and monitoring. In order to solve the problem that the quantitative research on remote sensing and monitoring of steppe vegetation coverage dynamic change is rare, the quantitative monitoring method provided by the invention comprises the following steps of: calculating to obtain six NDVI indexes, such as an NDVI yearly value, a yearly maximum value, a yearly minimum value, a yearly maximum value appearance date, a yearly minimum value appearance date and a season dynamic, which represent a steppe vegetation coverage situation, by using an NDVI time sequence file; and quantitatively monitoring a space-time dynamic change process, a phenological characteristic and a dynamic change tendency of steppe vegetation coverage by calculating a yearly dynamic change rate of the NDVI indexes within a certain time period and performing trend analysis by a Mann-Kendall method. The method is applicable to all vegetation NDVI data.

A lightweight, easy to assemble spa cover kit is disclosed herein. The cover kit includes a square or rectangular-shaped overhead cap pivotally attached at two corners along one end to two dual hinged support posts. The cap is made of lightweight, weather-proof material, such as molded fiberglass, and may include skylights to allow natural light through during use. The lower end of each dual hinged support post is pivotally attached to the deck surface on which the spa sits. During use, the upper end of each dual hinged support post is pivotally attached to one comer of the cap. After the lower ends of the dual hinged support posts are attached to the deck and the upper ends of the support posts are attached to the corners of the cap, the dual hinged support posts are slowly lifted to a vertical position while the cap is slowly rotated so that it is aligned horizontally over the spa. The set of fixed support posts are then inserted into opposite corners of the cap to support the cap in a horizontal position directly over the spa. The ends of the fixed support posts are then attached to the deck. Optional extension covers may be attached to the cap to provide additional covered space.

The invention discloses a variable density-based crust thickness gravity inversion method. The variable density-based crust thickness gravity inversion method comprises the steps of acquiring crust thickness and density data and upper mantle density data of a crust model CRUST 1.0 with global coverage space resolution 1 degree by 1 degree; building crust-mantle density difference changing with a horizontal position according to density and thickness of upper crust, intermediate crust and lower crust and upper mantle density data of the crust model CRUST 1.0; obtaining gravity abnormality caused by fluctuation of a moho surface by bouguer gravity anomaly; and converting depth of the moho surface and obtaining the crust thickness by gravity abnormality caused by the bouguer gravity anomaly. Compared with the prior art, disclosed document is used as a foundation, a practical crust-mantle density model is built, the variable density-based crust thickness gravity inversion method is easily implement from technology, an inversion result more conforms to actual geologic characteristic, and higher accuracy is achieved.

The invention provides a multifunctional nursing vehicle for a neurology department. The vehicle comprises a locker disinfecting device, a drying device and a handheld gun. A disinfectant pumped by awater pump can be atomized and sprayed into a locker through a fist atomization nozzle, and drugs and instruments inside the locker can be disinfected; after disinfection is completed, a hot-air blower of the drying device is used for drying, meanwhile, the disinfectant is gasified, and secondary disinfecting is performed; the handheld gun is used for atomizing and spraying the disinfectant pumpedby the water pump to the body of the nursing vehicle, an operation table and objects outside the nursing vehicle for disinfection, meanwhile, the handheld gun can also be used for drug changing cleaning, small-area contamination disinfection, drying and the like, the disinfecting device above a waste barrel can disinfect waste placed every time, the disinfection coverage space range is ensured, and the disinfection capability of the nursing vehicle is improved, and the application range of the nursing vehicle is improved; a control system can be connected into a program of an all-in-one vehicle of the informatization nursing vehicle, one-button full-automatic operation is achieved, workloads of nurses are lowered, and labor force is saved.

The invention provides a load balancing method for a super-dense heterogeneous mobile cellular network, comprising the steps of 1, dividing the coverage space of the super-dense heterogeneous mobile cellular network into a plurality of checkered grids with the same size, and periodically making statistics on the average flow rate in each checkered grid to obtain the loading capacity in each checkered grid, and using the loading capacity for representing time volatility and space difference of the network load; and 2, distributing base station providing coverage service corresponding to each checkered grid according to the loading capacity in each checkered grid and allocated wireless resources of each base station in the super-dense heterogeneous mobile cellular network. According to the load balancing method for the super-dense heterogeneous mobile cellular network, aiming at the characteristic that the loading capacities in 4G and post-4G mobile cellular networks are nonuniform in time variation and space distribution, effective load balancing is achieved, and utilization efficiency of wireless resources (such as fixed spectral bandwidths and fixed transmission efficiency of base stations) and system capacities in 4G and post-4G super-dense heterogeneous mobile cellular networks are improved.

The invention relates to an underwater vehicle collaborative search efficiency evaluation method based on situation simulation and Monte Carlo, and belongs to the technical field of underwater vehicle collaborative application research. The method comprises the following steps: 1, preprocessing a search sea area; 2, establishing a three-dimensional sonar vision field model; 3, establishing a search target model; 4, simulating a search process in a three-dimensional space according to a search strategy; 5, in the three-dimensional space, determining whether the target is located in the current sonar coverage area or not; 6, calculating the capability of sonar detection and identification of the target in the current coverage space; and 7, performing situation simulation for many times, calculating the number of encountered and identified targets in each search process, and obtaining a collaborative search probability through data processing to represent the search efficiency. According to the method, the quantization problem of the search probability in a three-dimensional space is solved through situation simulation and Monte Carlo, the method can be used for evaluating the task execution effect of the underwater vehicle cooperative system under a set search strategy, different search strategies are compared, and reference is provided for scheme formulation.

The invention discloses an apparatus which can automatically switch a continuous medium and a single page medium of a printer, comprising a power-driven device and a paper tractor of continuous medium. The utility model is characterized in that the central gear of the power-driven device meshes with a switching driving gear which moves together with a switching edentulous gear on the same shaft, partial circum of the switching edentulous gear is provided with tooth and meshes with the tooth of a switching arm changing gear, and clutches are installed on the switching arm changing gear; a status switching driving gear meshes with a rear friction roll gear and moves together with a status switching gear on the same shaft; the status switching gear meshes with driven gears of the paper tractor of the continuous medium; the switching arm gear is provided with a resetting spring. As the invention adopts the structure, the invention is characterized by low manufacturing cost and small coverage space, which can realize the automatic switch between the continuous medium and the single page medium of the printer.

The invention discloses a stack buffer overflow vulnerability detection method based on a program diagram. The method comprises the steps that 1, after source codes are statically analyzed, constructing a corresponding program diagram; 2, traversing the program chart to find a danger function to obtain an overflow point position; 3, calculating the address offset between the buffer space operatedby the overflow point comparison function and the size of the space to be covered; And 4, judging whether address offset occurs or not to obtain a vulnerability detection result, Wherein the danger function mainly aims at three danger functions of Strncpy (), Memcpy () and Gets (); for the Strncpy () and Memcpy () functions, buffer area space O and coverage space C of function operation are obtained, and for the Gets () function, only buffer area space O of the function needs to be obtained; For a Strncpy function, if the replication length n<O, there is no vulnerability, if the replication length n>O and O<C, there is vulnerability; For the Memcpy function, if the copy length n <O, there is no vulnerability, if n<O and O<C, then there is vulnerability; for the Gets function, if O = [0, infinite], then there is vulnerability..

The present invention discloses a method and apparatus for determining the priorities of neighbor cells. The objective of the invention is to effectively improve the accuracy of neighbor cells, code resources, frequency resource planning and optimization so as to improve the switching success rate of cells and reduce interference between the neighbor cells. The method for determining the priorities of the neighbor cells includes the following steps that: a stereoscopic space model including the coverage spaces of a cell and each neighbor cell of the cell is determined, a space corresponding to the stereoscopic space model covers the cell and each neighbor cell of the cell; stereoscopic spaces covered by the cell and the neighbor cells are determined in the stereoscopic space model, and a stereoscopic space which is commonly covered by the cell and each neighbor cell is determined according to the stereoscopic spaces covered by the cell and the corresponding neighbor cell; and the sequence of the priorities of the neighbor cells is determined according to the sizes of the stereoscopic spaces which are commonly covered by the cell and the neighbor cells.

The invention discloses an unmanned aerial vehicle bridge floor coverage motion planning method, belongs to the technical field of unmanned aerial vehicle control, and aims to solve the motion planning problem that an unmanned aerial vehicle stably completes the full coverage of the bridge floor and meets the coverage resolution requirement in an automatic detection task of a bridge surface. The method comprises the following steps of firstly, establishing a geographic coordinate system, an airframe coordinate system and a bridge floor coordinate system, giving a measurement model of an airborne camera, and giving the definitions of a coverage space, a coverage surface and the coverage resolution; secondly, decomposing a topological structure of the bridge floor by adopting a linear scanning form, and determining a bow-shaped coverage path for each decomposition unit; then determining the coverage sequence of the units by adopting an integer optimization method; then giving two mathematical descriptions of the flight space of the unmanned aerial vehicle under a coverage task by combining the distance range from the unmanned aerial vehicle to the bridge floor; and finally, taking the flight stability of the unmanned aerial vehicle as an index, and combining with limitations, such as position, speed, acceleration, flight space, full coverage requirements, etc., providing a method for obtaining a motion trail function by adopting curve optimization. The method is suitable for the unmanned aerial vehicle to quickly and stably complete the movement track planning of full coverage of the bridge floor under a bridge detection task.

The invention discloses a data processing device and a data processing method with reliable and safe performance. The data processing device is used for a shape space, and the shape space includes a plurality of micro spaces, and each micro space corresponds to a node on a multi-node line. The coverage space of the access point, the shape space is divided into multiple subspaces; the data processing device includes: an area acquisition unit, configured to acquire the subspace where the terminal is located according to the positioning information of the terminal; an area judgment unit, It is used to judge whether the subspace where the terminal is located is the preset legal subspace of the terminal, and if the subspace where the terminal is located is not the preset legal subspace of the terminal, generate a cross-regional alarm signal; the purpose of the present invention is to Provided are a data processing device and a data processing method that strengthen the monitoring and control of terminals, improve the safety performance of use, and design more humanized reliable safety performance.