4results about How to "Broaden their knowledge" patented technology

The utility model relates to a phase change thermo-acoustic engine experimental device which comprises a thermo-acoustic conversion system and an acoustic-electric conversion system. The thermo-acoustic conversion system comprises a sound production module and a Helmholtz resonant cavity, a ceramic plate stack soaked with water exists in the sound production module, and the stable temperature difference needed for generating the thermo-acoustic effect at the two ends of the ceramic plate stack is reduced. Sound waves generated by the thermoacoustic effect form standing waves in the Helmholtz resonant cavity, and the sound intensity is amplified; the acoustic-electric conversion system comprises piezoelectric ceramics and a triode common-emitter amplification circuit, the piezoelectric ceramics are arranged at the tail end of the resonant cavity and convert acoustic energy into electric energy, and the electric energy is amplified by the triode common-emitter amplification circuit and then drives a nixie tube to display. The experimental device integrates thermodynamics, fluid mechanics, acoustics, material science and electronic technology, has the characteristics of simple structure, low cost, rich physical process and strong exploration, is suitable for experimental teaching, particularly suitable for new engineering teaching requirements, and is beneficial to improving the multidisciplinary cross practice ability of students.

The invention relates to the technical field of smart tourism, in particular to a personalized scenic spot content generation method, system and device based on a multi-modal knowledge graph and a medium, and the method comprises the steps: collecting multi-modal data of a scenic spot, and constructing a structured multi-modal scenic spot knowledge graph based on the multi-modal data; obtaining personalized data provided by the tourist, and constructing a personalized portrait of the tourist based on the personalized data; in response to an operation of acquiring an image in a scenic spot, identifying the scenery in the image, and extracting a corresponding initial knowledge subset from the multi-modal scenic spot knowledge graph according to an identification result; performing personalized screening and expansion on the knowledge nodes in the initial knowledge subset by calculating the matching degree between the knowledge nodes in the initial knowledge subset and the tourist interest in the personalized portrait of the tourist, and dynamically binding multi-modal resources to generate a personalized knowledge graph; and presenting the personalized knowledge graph. According to the invention, the multi-mode scenic spot knowledge experience of which the structure is matched with the interest and the knowledge background can be provided for tourists.

The invention discloses an intelligent sound equipment audio playing control method and system, and belongs to the technical field of voice interaction. The method comprises the following steps: obtaining current multi-dimensional context information; if the voice instruction is a semantic fuzzy instruction appearing for the first time, creating an initial semantic anchor point, and storing the initial semantic anchor point into a personalized semantic network; positioning context coordinates based on the personalized semantic network; judging the type of the voice instruction intention; if the instruction intention is a playing request, obtaining a target audio and playing the target audio; if the instruction intention is meta inquiry, knowledge answers are generated and output; and monitoring a subsequent feedback behavior of the user on the playing result. According to the method, the personalized semantic network is constructed to analyze the semantic fuzzy instruction, refined retrieval is realized based on context sensing, and a meta-inquiry processing mechanism is established to generate the knowledge answer, so that the problems that in the prior art, the intelligent sound equipment cannot understand abstract description, is difficult to process negative instructions and cannot answer related inquiry of audio content are solved.

The application discloses a child camera, which comprises a shell, a main control module arranged in the shell, a camera module, a display module and an audio module which are electrically connected to the main control module respectively, the camera module and the display module are arranged on opposite two end faces of the shell respectively, the camera module comprises at least two cameras, at least one of which has an optical zoom function, the main control module is further communicatively connected to an object recognition module, the object recognition module is adapted to recognize objects in images captured by at least one of the cameras and acquire text, picture and / or sound information related to the objects, and the main control module is adapted to receive the relevant text, picture and / or sound information and control the display module to display the text and / or the picture and control the audio module to play the sound information, so as to help children understand the name, characteristics, use and other information of the objects and promote the improvement of their cognitive ability.