120 results about "Practice effect" patented technology

The invention relates to a pedestrian detection and recognition method based on a deep learning cascade neural network, and the method comprises the steps: (1) sending a preprocessed video image sequence to a first-level neural network, and obtaining the original information of a pedestrian in an image; (2) segmenting a local image of the pedestrian in the image and carrying out normalization processing to construct a pedestrian recognition data set; and (3) sending the pedestrian recognition data set to a second-level neural network, and extracting feature information of the pedestrians to realize identity recognition of the pedestrians. According to the method, the problems of inaccurate target positioning, low pedestrian resolution, low pedestrian identity recognition accuracy and the like in the image are solved, relatively good image information of the target pedestrian can be obtained, and the pedestrian detection and recognition accuracy is improved. The method is good in practice effect and high in operation speed, detection and identity recognition of the target pedestrian can be rapidly and accurately achieved in real time, and the method is suitable for various fields ofvideo monitoring, intelligent communities, specific place supervision and the like.

The present invention relates to an apparatus of providing a user interface for playing and editing moving pictures (i.e., video) and the method thereof, the user interface being capable of maximizing learning and practice effects by providing an interface which allows inserting of cue-points in the video on the basis of beats in music or periodic signals equivalent thereto and visibly displaying cue-points, recording of one's practice clips while playing the video so as to allow video playback and practice at the same time, and the instantaneous comparison/analysis of the recorded practice clips and reference video.

The invention discloses an intelligent acoustics piano, having a piano learning-assisting function and a mute function. The piano comprises a main control board, wherein the main control board is provided with an MCU and a memorizer, a clock device, an input output interface and a sound card connected to the MCU; two ends of a sensor are respectively connected to a key and the main control board; and a key-pressing device, a display screen and a speaker are all connected to the main control board. A mute structure comprises a mute control device, a mute brake pedal and a damper steel wire rope that are connected by order, wherein the damper steel wire rope is connected with a damper connecting rod, the upper end of the damper connecting rod is provided with a mute damper to prevent a hammer from striking a string, and the lower end of the damper connecting rod is pivoted on the lower end of a braking steel wire shaft sleeve plate. The piano realizes a flexible teaching method of combining video with audio. Equipped with a professional music score system and an MIDI music score synchronizing system, the piano supports real-time score displaying and score progress displaying. Practicing piano playing with the mute function of the intelligent acoustics piano, the players can get better practice effect.

The invention discloses a mathematics autonomous learning system in the technical field of teaching instruments. The mathematics autonomous learning system comprises a central control system, a storage and download man-machine interaction subsystem, an operation subsystem, a sound outputting subsystem, a backup subsystem and a display subsystem. The central control system is electrically connected with the storage and download man-machine interaction subsystem in the bi-directional mode through a wireless communication unit. The central control system is respectively and electrically connected with the operation subsystem, the sound outputting subsystem, the backup subsystem and the display subsystem through a CAN bus system in the bi-directional mode. The mathematics autonomous learning system is intelligent and convenient and the on-site interaction between the system and students is enhanced. Meanwhile, the learning process of students can be supervised at any time. Therefore, students are in one-to-one correspondence with student learning terminals according to the student numbers of the students, so that the learning interest of students is improved. At the same time, teachers can conveniently make different guiding schemes for each of all the students according to the learning progresses and the practicing effects of the students.

The invention discloses a method and system for assisting a musical instrument playing practice, a terminal device and a server. The method for assisting a musical instrument playing practice comprises steps of obtaining an audio frequency signal and a surface muscle electric signal of a musical instrument practitioner during playing, reporting playing data to the server in order to let the server determine a playing evaluation result according to the playing data, wherein the playing data comprises the audio frequency signal and the surface muscle electric signal, receiving a playing evaluation result returned by the server, and displaying the playing evaluation result in order to guide the musical instrument practitioner to practice playing the music. The method and the system for assisting the musical instrument playing practice, the terminal device and the server can utilize sound made during the process of playing the musical instrument and the surface muscle electric signal generated by motion of a player's fingers during the playing and thus can assist practice of the musical instrument playing without affecting finger operation on the musical instrument during the playing. As a result, even the musical instrument learner is at home, the musical instrument player can independently, conveniently and flexibly perform playing and practicing and a practice effect of the learner can be judged.

The invention relates to a method of generating frequency dependence network equivalence based on an integral vector fitting process, and belongs to the technical field of dispatching automation of electric power system and power grid emulation. The method comprises calculating a sampling value of network frequency characteristics based on a simplified model method, calculating any element of frequency dependent network equivalent (FDNE) according to the sampling value of the frequency characteristics based on a vector fitting process, and generating the FDNE by adopting the integral vector fitting process. The method of generating the frequency dependence network equivalence based on the integral vector fitting process has the advantages of being high in efficiency, accurate and practical, is convenient to achieve in a time domain, is directly applied to electromagnetic transient emulation and is satisfying in engineering practice effect.

The invention discloses an intelligent oral English practice pavilion system device which comprises an oral English practice pavilion body and an intelligent touch on-demand system. By shortening theonline and offline distance, the system gets close to every oral English practicer, the oral English practice experience of a user can be greatly improved, the living room culture is converted into anall-people cultural activity with the most hotspot in future, people can have oral English practice loudly in a limited environment when an existing environment is not satisfied, the professional-level oral English practice sound recording is achieved, an oral English practice scene graph can be intelligently arranged according to the oral English practice works of the user, the ratio of the background music volume to human sound is automatically adjusted, and the quite good oral English practice effect is achieved; by means of a unique file storing and encrypting unit and a DRM protecting unit, the on-demand content copyright security is ensured, and files cannot be used without being authenticated after being downloaded locally.

The invention relates to an inhibition method for chromium fog generated in chrome plating production and belongs to the field of environmental protection treatment methods. The inhibition method for chromium fog generated in chrome plating production comprises the following steps: preparing a chrome fog inhibitor into a certain concentration of chromium fog inhibitor solution, adding the chromium fog inhibitor solution to a chrome plating electrolyte which is preheated to 50 DEG C, fully stirring and then carrying out chrome plating electrolysis. According to the inhibition method for chromium fog generated in chrome plating production, a 2-4mg/L of fluorine-containing surfactant, namely, potassium perfluorohexyl ethyl ether sulfonate or potassium perfluorooctyl sulfonate is added into the chrome plating electrolyte in an appropriate addition manner so that a stable foam layer can be formed, the volatilization of chrome fog is prevented and the environmental pollution is reduced and the good practical effect is achieved when the inhibition method is applied in actual production. The inhibition method has the advantages of simple process, convenience in operation, low cost, good inhibition effect and the like.

The invention discloses a calligraphy practicing system, apparatus and method. The calligraphy practicing system comprises a database unit, an identification unit, a font recommendation unit, a font selection unit, an updating unit, a writing navigation control unit and a display unit, and the writing navigation control unit is used for determining matrix writing navigation information of a matrix according to the matrix output by a font output control unit, obtaining a writing navigation image with the combination of the matrix writing navigation information and the matrix copying state obtained by the updating unit, and outputting the writing navigation image to the display unit. According to the system, apparatus and method, a proper font can be recommended for a practitioner according to the unique font style of the practitioner, writing navigation is provided for the practitioner during writing practice of the practitioner, the practicing effect is greatly improved, and the practitioner can improve the writing level more quickly.

The invention discloses a copybook capable of realizing repeated calligraphy tracing, copying and imitation as well as a penmanship practice method of the copybook. The penmanship practice copybook consists of a soft colored double-ground-surface plastic paper printed copybook, writing liquid, soft single-ground-surface transparent covering copying plastic paper and soft single-ground-surface colored imitation plastic paper. The copybook provided by the invention simultaneously has various functions such as repeated calligraphy tracing, copying and imitation, is applicable to brush pen calligraphy, and is also applicable to pen calligraphy. The penmanship practice copybook provided by the invention has the advantages that the writing visual effect and the pen wielding feeling are respectively similar to the writing feeling on ordinary paper or rice paper, the calligraphy tracing and copying are clearer and easier, the penmanship practice effect is greatly improved, and in addition, a great amount of paper and cost can be saved.

The invention provides calligraphy practice software which can be used by practitioners to practice calligraphic skills. The software mainly comprises a calligraphic font database, a handwriting display writing area, a handwriting display prompt information area, a practice mode, practice assessment and error correction explanation, non-repeated practice sieving and distribution and level assessment. The software can make the calligraphy practice easy, and is especially convenient and effective to the hard-tipped pen calligraphy practice, and can automatically give assessment of the practice effect.

The invention relates to the field of auxiliary apparatuses of string instruments, and specifically relates to a guitar chord device. The guitar chord device comprises a shell, a fixing device, a resetting device, and a plurality of chord pressing devices, each chord pressing device comprises a plurality of chord pressing rods and finger pressing columns having the equal quantity with the chord pressing rods, the chord pressing rods are arranged in the shell and adjacent to strings, the bottom ends of the finger pressing columns penetrate into the shell from the top of the shell and are connected with the corresponding chord pressing rods, the top ends of the finger pressing columns are located at the external part of the shell, two opposite ends of the resetting device are respectively connected with the shell and the finger pressing columns to separate the chord pressing rods and the strings, the fixing device is arranged on the shell and used for fixing the shell and a finger board, and each chord pressing rod is used for pressing a specific chord. Compared with the prior art, the guitar chord device is advantageous in that the playing difficulty can be simplified, the structure is simple, the dismounting and the installation are convenient, and the practice effect is good.

The invention discloses a leg ligament stretching device. The leg ligament stretching device comprises a base, wherein leg pressing plates are hinged to two sides of the base respectively; the two pressing plates are hinged to supporting rods through connection seats respectively; end parts of the two supporting rods are hinged to two ends of a support respectively; a hand-cranking take-up devicefor wining a steel wire rope is arranged on the upper surface of the base; a free end of the steel wire rope is wound on a pulley block mechanism; the pulley block mechanism is connected with a fixedpin on the support through a wire rope; a seat cushion is arranged at the right end of the base; a leg baffle plate and a supporting plate are arranged at the end part of each pressing plate. The legligament stretching device has a supporting effect on a foot supporting point so that a user can keep a balance state in a practicing process and a better practicing effect is realized; meanwhile, thestretching strength can be adjusted according to self-feeling conditions of the user.

The invention relates to a frequency-related network equivalence passivity correction method and belongs to the technical field of power system scheduling automation and power network simulation. According to the method, a mathematic model of frequency-related network equivalence is divided into a plurality of sub-blocks, and the sub-blocks are subjected to passivity correction, so that the calculation amount of each sub-block is reduced and the method can be enabled to be very efficient by utilizing parallel computing; and when each sub-block is solved, a convex optimization model is adopted for ensuring the solving to be successful definitely. The frequency-related network equivalence passivity correction method is efficient and can ensure success; the blank in the field is made up for; and the engineering practice effect is satisfied.

A fixing device for a soil pressure gauge is provided with a plurality of rotating supports which are connected together through pins. Each rotating support is provided with a bottom plate. Clamping portions are symmetrically arranged at the two ends of each bottom plate. Each clamping portion is of a right angle structure. Each bottom plate and the corresponding clamping portions at the two ends of the bottom plate together form a rectangular-frame-shaped structure which is used for containing the soil pressure gauge and provided with an opening in the top. A plurality of fixing leg columns for being inserted into a soil body are further arranged at the lower portion of each bottom plate. The fixing device is simple in structure, convenient to use and low in cost, the soil pressure gauge can make close contact with surrounding rock through openings formed between clamping portions at the top ends of the rotating supports, and monitoring accuracy is improved. Pressure of the surrounding rock can be safely, efficiently and reliably monitored, the practice effect is good, and practicability is high.

The invention provides a method for music playing and tuning. The method comprises the steps of S1, acquiring an environmental sound signal to perform analog to digital (A/D) conversion so as to obtain and store voice digital quantity; S2, extracting the voice digital quantity and comparing the voice digital quantity with a preset voice sample to obtain a comparison result; and S3, feeding back the comparison result to a user. The invention further discloses an apparatus and a device for music playing and tuning. The method, apparatus and device for the music playing and tuning facilitates music practice of children, can perform an accurate test to playing results of the children and can feed back the music practice effect.

The invention relates to a corrosion inhibitor for preventing corrosion of oil-gas field steel equipment and a preparation method thereof. The corrosion inhibitor consists of the following raw materials in part by mass: 1 to 1.2 parts of crude quinoline salt-based mixture, 0.2 to 0.4 part of alkali amide compound, 0.4 to 0.6 part of chloralkane compound and 4 to 5 parts of ethanol through a synthetic reaction. Coupon tests in labs and on site and electrochemical tests prove that: the corrosion inhibitor has corrosion inhibiting effect in a sulfur-containing medium. The corrosion inhibitor is low in cost and easy to synthesize, and has high-efficiency practice effect.

The invention belongs to the technical field of multimedia teaching equipment, in particular to an embedded multimedia system based writing practice board system and a writing practice method. The writing practice board system comprises a writing practice body, a touch screen arranged on the writing practice body and an embedded system, wherein the touch screen can be used for sensing the touch of a user, generating position signals and also displaying information; and the embedded system is accommodated in the writing practice board body and electrically connected with the touch screen and can be used for receiving the position signals from the touch screen and converting the position signals into handwriting information. In the writing practice method, the writing practice board system is used for guiding the writing practice. The invention can increase the interest while practicing to write and improve the writing practice effect.

The related ventilator for drive motor of oil-field driller comprises: a scroll case with a ventilator motor on side and a driven impeller inside, and an air-duct fixed on case outlet. This invention can cool the disk braking device at one time, and has compact structure and well practice effect with low noise.

The invention, which relates to the field of vocal music teaching, discloses an electronic auxiliary vocal pronunciation system for vocal learning. The system is composed of an audio acquisition module, a first buffer module, a reference audio storage module, a second buffer module, a first time-frequency conversion module, a second time-frequency conversion module, a first beat extraction module, a second beat extraction module, an audio similarity detection module, a tone contrast module, a beat comparison module, a comprehensive evaluation module, an input module, a control module, a display module and a read-write module. According to the electronic auxiliary vocal pronunciation system, data acquisition, conversion and evaluation during the whole vocal pronunciation situation detection process are completed; and evaluation is carried out in three aspects of intonation, tone, and beat, so that the student determines whether the tone quality is good or bad, the beat is correct, and the intonation is correct during own vocal skill practicing timely and thus carries out oriented vocal practicing to improve the practice effect.

The invention discloses a method for governing pebble sand wave beaches on the upper reaches of the Yangtze River. The method comprises the following steps of studying the rule of pebble sand wave movement, studying the governing rules of the pebble sand wave beaches, obtaining the governing method for the typical pebble sand wave beaches, and summarizing the governing technology of the pebble sand wave beaches. The method for governing the pebble sand wave beaches on the upper reaches of the Yangtze River is applied to governing of complex pebble sand wave beaches such as bamboo hat sub beaches and seive back beaches, an excellent engineering practice effect is obtained, the maintenance and management level of channels and the overall passing capacity of the shuyu channel are greatly improved, the Yangtze River transportation is effectively promoted to quickly develop, a pulling effect is achieved on national economy and other numerous relevant industries, and the growth of economy in areas along the upper reaches of the Yangtze River is achieved.

The invention relates to the technical field of drum set industry, particularly a drum set with silencing and regulation functions, which comprises a drum cavity, wherein one end of the drum cavity is provided with an upper drum leather; the inner wall of the other end of the drum cavity is connected with an inner drum sleeve through threads; the outer end of the inner drum sleeve is provided with a lower drum leather; a sound-insulation cotton sleeve is closely nested in the inner wall of the drum cavity; one end of the sound-insulation cotton sleeve is in a closed state; the closed cross section of the sound-insulation cotton sleeve is conical; the closed surface and the upper drum leather form a sound-absorption cavity; and the other end of the sound-insulation cotton sleeve is open and abuts against the inner end of the inner drum sleeve. When the drum set is in use, the sound-absorption cavity can absorb abundant vibrations and absorb the vibrations of the drum cavity wall through the sound-insulation cotton sleeve, thereby greatly reducing the generation of sound; and meanwhile, the drum set can not influence the power generation of the hands, and the drummer can feel like beating the drums as usual, thereby greatly enhancing the practice effect of the drummer. The drum set has the advantages of simple structure, reasonable arrangement, low manufacturing cost and the like.

The invention belongs to the technical field of wearable intelligent hardware, and more specifically relates to a wearable auxiliary device used for shadowboxing practice. The wearable auxiliary device comprises a main control panel (1), a first 9 shaft posture detection module (2), a second 9 shaft posture detection module (3), a third 9 shaft posture detection module (4), a fourth 9 shaft posture detection module (5), a fifth 9 shaft posture detection module (6), a sixth 9 shaft posture detection module (7), a seventh 9 shaft posture detection module (8), an eighth 9 shaft posture detection module (9), a ninth 9 shaft posture detection module (10), a tenth 9 shaft posture detection module (11), a practice auxiliary clothes (12), a leg wrapping belt (13), a first glove (14), and a second glove (15). The wearable auxiliary device can be used for solving problems of people in shadowboxing practice, is convenient to use, is excellent in practice effect, and is portable.

The invention relates to a high-stimulated golf device and a method thereof. A device body mainly comprises a target display set and a sensor set, wherein the target display set can indicate a batting target, while the sensor can sensor the batting falling point. The device body calculates the distance difference between the batting target and the batting falling point, and the distance difference can be used as the reference for setting next batting target. The method comprises the following steps: a, displaying the batting target; b, sensing the balling falling point; c, calculating the distance difference; d, resetting the batting target; and e, re-sensing the batting falling point. Therefore, the device is repeatedly used by users for batting until the distance difference is less than zero or equal to zero. The device has high stimulation, and can improve the variety of practice and enhance the practice effect by setting each distance difference and the batting target; and a diversified practice mode further improves the fun and interest of the user.

The invention relates to a method for designing a graphite blackbody cavity of a high-temperature blackbody radiation source, and belongs to the technical field of thermology. The method comprises the steps as follows: in the aspect of conical end part design of the graphite blackbody cavity, the radiation heat exchange angle factor theory is taken as an analysis tool, the hypothesis that the inner wall surface of the end part of the graphite blackbody cavity and the inner wall surface (including the bottom surface) of the cavity are consistent during radiation heat exchange is proposed, and then relative parameters of cone of the end part of the graphite blackbody cavity are calculated and inferred. The method is practicable in principle, reasonable in hypothesis, good in practice effect and applicable to the design of the graphite blackbody cavity of the high-temperature blackbody radiation source.