The invention provides a depression risk screeningsystem and method based on a virtual reality scene electroencephalogram signal. Under the stimulation of a virtual reality scene, real-time acquisition, processing and analysis of data are carried out on the electroencephalogram signal by an electroencephalogram acquisition system, and finally, a depression risk is screened by a data mining method. The system provided by the invention comprises a virtual realityinduction system, a electroencephalogram signal acquisition system and a data analysis system; the virtual reality induction system is used for establishing different virtual reality scenes; the electroencephalogram signal acquisition system is used for acquiring the electroencephalogram signal of a human brain, which is generated under the stimulation of the virtual reality scene and is continuously changed, and outputting the processed electroencephalogram signal and extracted real-time feature information; the data analysis system has a classification discrimination model trained by labeled healthy populations and depression risk populations, compares feature information required in a depression screening process with feature parameters of the classification discrimination model, and distinguishes and discriminates the healthy populations and the depression risk populations.
The invention relates to a fast triangle star atlas identification method in astronomy navigation technology field, which includes steps: 1. using star angular distance as a main identification characteristic, using relative magnitude difference of two stars as a auxiliary identification characteristic to determine star atlas identification characteristic quantity, using the star angular distance between two stars, the relative magnitude difference and star number of the two stars composing the star pair as storage basic element, hypothesizing star sensor view field diagonal distance to be d, storing all basic elements with diagonal distance less than or equal to d, constructing a navigation star database and storing the same; 2. extracting observed stars in a observation star atlas, ordering the star from light to dark according to brightness, constructing a observation triangle to be identified; 3. performing triangle identification by utilizing the method; and 4. verifying. The method realizes fast identification of star triangle in the observation star atlas, has advantages of small amount of calculation, stronger fault tolerance capability, faster identification time and navigation database with smaller capacity, and reduces storage pressure of redundant data to hardware system.
The invention discloses a mobile robot navigation map generation method based on ORB_SLAM2. The method comprises the following steps: step one, carrying out visual information collection; to be specific, enabling a mobile robot to move freely in a three-dimensional environment and collecting image information and depth information through a depth sensor; step two, on the basis of an ORB_SLAM2 algorithm, estimating pose information of the robot, carrying out local BA pose information optimization, screening key frames, selecting one key frame, outputting the pose information of the key frame, providing a sensor reference transformation matrix for creating a navigation map, and updating pose information of each key frame according to the global BA optimization under the condition of detecting a loop; and step three, carrying out map updating; to be specific, generating a three-dimensional map based on a skip list tree according to the pose information and carrying out updating continuously according to pose information of the new key frame. According to the invention, an efficient three-dimensional map is created by utilizing the depth image information; and the map uses the skip listtree structure as a data structure of the three-dimensional map, so that positioning, navigation and obstacle avoidance of the mobile robot can be realized in real time.
An apparatus and a method for processing sensor data for a vehicle using an unified data formateXtensible Markup Language in process of data communication between various vehicle sensors and a vehicle application system, which facilitates transmit and receive data processing in terms of a vehicle network of the sensors and the application system are provided. The apparatus for processing the sensor data for the vehicle using the XML includes a plurality of vehicle sensors installed inside the vehicle for detecting a change of physical quantity and providing a detection signal; a sensor transducer for converting the detection signal of the vehicle sensors to an electrical analogsignal; a signal conditioning unit for amplifying the electrical analog signal to a measurable signal; an Analog / Digital Converter (ADC) for converting the amplified analog signal to sensor data of a digital signal; a frame generator for generating and providing the sensor data converted to the digital signal per frame; and a sensor data converter comprising a Dynamic data Exchange Channel (DEC) for batch-processing the sensor data input from the frame generator per frame, in an XML format. The DEC of the sensor data converter defines a structure of the sensor data using a schema of the XML and converts the sensor data format to the XML format at the same time.
The invention discloses a matching method of a symmetrical issuing subscription system based on a plural one-dimensional index, belonging to the field of databases and comprising the following steps of: receiving data submitted by a user through a system; inquiring the subscription matched with an event and inserting the event into an event index; and inquiring the event matched with the subscription and inserting the subscription into a subscription index. The method has the advantages that: (1) when the event is matched with the subscription, the inquiring mode of the invention is range query instead of point query; and (2) when a subscription predication index is established, equal predications are stored into a form of B and tree, are considered as the conjunction of unequal predications and are decomposed into greater and smaller predications; and when the index is established, the node is respectively inserted into a greater predication index tree and a smaller predication index tree and two predications are used as a counting condition. Therefore, the data structure of the system is simple and easier to realize. The matching performance and the dynamic maintenance performance of the invention have favorable stability and favorable expansibility.
Sounding a buzzer a plurality of times can be controlled with few commands, the processor load is reduced when sounding the buzzer, and the buzzer can be sounded at the desired timing. A printer 1 having a buzzer 40 receives print data containing four types of data, a print configuration command A, a buzzer configuration command B, a printing control command C, and a stop printing command D, from a host device 2. The buzzer configuration command B is a command that sets the conditions and method of sounding the buzzer 40. The buzzer configuration command B sets the new page command C2 as the command that triggers sounding the buzzer 40 from among commands and data contained in the printing control command. When the control unit 10 of the printer 1 detects the new page command C2 while executing a print job, the control unit 10 causes the buzzer 40 to sound at the specified timing in the new page process.