32results about How to "Excitation potential" patented technology

The present invention provides one comprehensive system with integrated sound, light, electric, magnetic, heat, massage, medicine ion penetrating and audio and video treatment and combining several kinds of energy and technology with environment, acceptor and his consciousness and can stimulate the latent energy and immunity of the acceptor himself. Based on the features of the acceptor, the said items of treatment may be selected simultaneously or partially, statically or dynamically for amendment, induction and treatment until all the meridians are dredged. The present invention can reach the functions of strengthening body physically and mentally, especially for those with nervousness and athletes. The present invention promises to take active role in treating cardiac and cerebral vascular diseases, tumor, drug addiction, AIDS, etc.

The invention discloses a teaching evaluation system. The system comprises a teaching evaluation module; the teaching evaluation module is connected with a user server; the user server comprises a supervision and evaluation module and a student evaluation module; the supervision and evaluation module comprises an evaluation list module and a historical evaluation module; the evaluation list moduleis connected with a course list module; the course list module comprises a course information module, an evaluation standard module and an evaluation and suggestion module; and the historical evaluation module and the student evaluation module are both connected with an evaluation detail module. An establishment method comprises the following steps of (1) confirming evaluation indexes; (2) confirming a weight coefficient; (3) adjusting and correcting the weight coefficient. The overall structural design is ingenious and reasonable; diversified development of students can be achieved through the teaching evaluation system; and more attention is paid to individual difference of the students, so that teachers and the students can better know and communicate mutually, and the teaching qualityis improved.

The invention relates to a health beer with auxiliary inhibition to tumor, which is characterized by the following: adopting the normal beer brewing technology; adding a certain amount of edibly acceptable fulvic phenol, zinc ion source, chromium ion source, selenium ion source, vitamin C, licorice and superoxide dismutase; adding some functional factors to change the beer to be absorbed more easily for the body through fermentation; enhancing the body's immune capacity and killing tumor cells to inhibit growth and reproduction; displaying nutrition and health function and acceptable taste.

The invention discloses an intelligent teaching system which comprises a cloud system management platform, a mobile terminal, a learning terminal and a classroom server. The cloud system management platform is used for arranging classrooms, setting the durations of the arranged classrooms, giving people subject options and setting lecture attending prices of the classrooms. A user carries out registration through the mobile terminal and carries out payment operation after selecting the classroom, duration and classroom seat set by the cloud system management platform. The cloud system management platform generates a learning plan for the user according to the information filled by the user during registration and gives lecture attending remind to the user according to the generated learning plan. The learning terminal receives knowledge information needing to be learned by the user on the current day and generates a before-learning test. The learning terminal generates a learning content list through big data analysis and executes a classroom learning task for the user after obtaining the before-learning test score of the user.

The invention relates to a 25-node intensive seedling growing method. Through the accurate control of 25 key points of seedling preparation, accelerating germination and sowing, after-sowing management, after-emergence management, seedling before-colonization management process and others, the influence of the human or weather factors on the quality of seedling cultivation can be reduced, and the aims of stimulating the seed potential, promoting the seedling growth, improving the seedling quality, and increasing after-colonization output can be achieved. The seedling growing process can be programmed, standardized, and quantified, and the efficiency can be significantly improved, the seedling growing cost can be reduced, and the seedling quality can be guaranteed. Large-scale seedling rate and uniformity can be increased to 95%, and the technology is easy to popularize. The seedling stage cost is reduced about 15% by comparing with a conventional seedling growing method, and the production at the later stage is 8-10% increased.

The invention discloses a control method for realizing network sharing based on education human resources, which comprises the following steps: a system control teacher port is connected with a central server platform; the central server platform sends information to the teacher port requesting the user to display the education service it can provide. The central server platform receives the relevant information inputted by the user and stores and displays the information. The system controls the connection between the student port and the central server platform. When teachers' resources andstudents' needs are matched and reached, the interaction between teachers and students can be realized. The invention relates to a control system for realizing network sharing based on education humanresources, which comprises a central server platform, a teacher port and a student port. This program makes teachers get remuneration through labor, so as to stimulate teachers' enthusiasm and make full use of the social human resources, which can be widely used in the field of Internet education and so on.

The invention provides a cellsovary granulosa cell anti-aging product, and the preparation method and the application of the product. The invention applies cellsovary granulosa cells in preparation of anti-aging products. The cellsovary granulosa cell anti-aging product of the invention is characterized in that in vitro cultivated and amplified cultivation supernatant of female mammalian animal celsovary granulose cells and / or the cell extract is contained; and one or more than one pharmaceutically acceptable medical excipient and antioxidant are contained. Via the cellsovary granulosa cells, the invention is capable of proliferating and secreting large amounts of a plurality of bioactive substances. The invention adopts granulose cells with extremely high bioavailability and similar to female physiological characteristics to cultivate supernatant and the cell extract of the supernatant. The invention can be taken orally, absorbed by skin or be prepared into vaginal suppository to achieve the purpose of anti-aging.

The invention relates to a learning instructional aid and a learning method thereof. The learning instructional aid comprises a shell, a wheel disc, a timer, and a question card drawer. The wheel disc, the timer, and the question card drawer are all disposed on the shell. Numbered question cards are placed in the question card drawer. A voice collection close button is arranged on the housing. Thelearning instructional aid also includes a display touch screen, a microphone, a sound collection module, a voice recognition module, a display module, a receiving module, a statistics and comparisonmodule, and an evaluation module. Through the training of students' rapid construction of situational language, the learning instructional aid and the learning method thereof are completely close tothe essence of language learning and cultivate the students' abilities of language construction and imagination. The problems that traditional learning tools and language learning methods are low in effectiveness and poor in experience are solved.

The invention discloses an implementation method of a student integral system excitation system. The method comprises the following steps of creating classes and setting the classes; students being added to classes; commenting the students; performing report analysis; performing team message notification. According to the student integral system excitation system implementation method, comprehensive performance of students can be subjected to process omnibearing quantitative assessment, potential of the students is fully stimulated, comprehensive and personalized development of the students ispromoted, a comprehensive quality evaluation report is automatically generated, students, teachers and parents are helped to obtain a real and effective diagnosis report, and the student integral system excitation system implementation method is suitable for popularization and application; and meanwhile, working intensity of education work such as teachers and the like can be reduced.

This invention discloses one method to trigger body latent ability and its device, which comprises the following steps: inputting psychological suggestion content in play system to guide person for psychological for facilitation to make person avoid off subject factor obstruction in the process. The device comprises buffer materials and media player and buffer materials to form one space without saying the unwanted ones.

The invention discloses a children manual computer study tool and a using method of the children manual computer study tool. The children manual computer study tool comprises an analog displaying board, an analog keyboard board, 36 stamp keys, stamp ink, picture cards and stamp paper. The analog displaying board and the analog keyboard board can be detachably matched in a hinged mode. The analog displaying board is provided with a picture card inserting frame, stamp paper grooves, an answer correct groove and an answer rectifying groove, wherein the answer correct groove and the answer rectifying groove are in match with the shape of the stamp paper. The analog keyboard board is provided with 36 stamp key grooves, wherein the bottoms of the 36 stamp keys are respectively provided with stamp absorbing cotton with numbers from 0 to 9 and English letters from a to z. The picture cards comprise a question area and an answer area. A covering layer capable of being torn off is arranged on the answer area. The using method of the children manual computer study tool comprises answering and rectifying answers of the picture cards through the stamp keys, and is capable of stimulating curiosity of children, enabling the process of finding answers to be exhilarating and the process of rectifying the answers to be full of fun.

The invention provides a cellsovary granulosa cell anti-aging product, and the preparation method and the application of the product. The invention applies cellsovary granulosa cells in preparation of anti-aging products. The cellsovary granulosa cell anti-aging product of the invention is characterized in that in vitro cultivated and amplified cultivation supernatant of female mammalian animal celsovary granulose cells and / or the cell extract is contained; and one or more than one pharmaceutically acceptable medical excipient and antioxidant are contained. Via the cellsovary granulosa cells,the invention is capable of proliferating and secreting large amounts of a plurality of bioactive substances. The invention adopts granulose cells with extremely high bioavailability and similar to female physiological characteristics to cultivate supernatant and the cell extract of the supernatant. The invention can be taken orally, absorbed by skin or be prepared into vaginal suppository to achieve the purpose of anti-aging.

The invention relates to an external medicinal preparation containing badger fat. The external medicinal preparation contains a badger fat component, and comprises paste liquid and capsules for treating haemorrhoids, paste liquid for treating burns, scalds, chimatlon, cuts and gunshot wounds, paste liquid for treating gynecological inflammations, paste liquid for treating ocular inflammations, paste liquid for treating skin diseases, paste liquid for treating prostates or paste liquid for treating skin injuries caused by skin cancer and radiotherapy and chemotherapy. The invention also discloses a preparation method of the external medicinal preparation. The external medicinal preparation has the advantages that the preparation process is simple, related diseases can be effectively treated, the human body cannot be damaged even the external medicinal preparation is used for a long time, the human immunity can be improved, and the potential of the body itself is stimulated, thereby achieving the purpose of health.

The invention discloses a wireless measurement-while-drilling system polarization channel coding method based on a Gray code structure, and the method comprises the steps: constructing a polarizationchannel coding method according to the structure of a Gray code, and the coding method being used in a channel coding module of an underground instrument of a wireless measurement while drilling system; designing a continuous cancellation list (SCL) decoding algorithm according to a channel coding method of an underground instrument, and then applying the algorithm to a decoding module of a groundinstrument of a wireless measurement while drilling system to recover underground sent data. The method has the advantages that the constructed polarization channel coding method has a Gray code structure and has better error code performance than a common polarization code, so that the potential of the polarization code is further excited, the bit error rate of the wireless measurement-while-drilling system is effectively reduced, and the reliability of the system is improved.

The invention belongs to the technical field of health-care insoles, and discloses an artemisia argyi insole and a health care shoe with health care effects. The artemisia argyi insole with health care effects comprises an insole body, and a plurality of raised massage beads are adhered to different positions of the insole body; wormwood balls are placed in the massage beads; and vent holes are formed in the massage beads. An elastic layer is adhered to the lower part of the insole body; and a plurality of grid holes are formed in the insole body. The health care shoe is provided with a shoe body, a footstep recognizer is embedded in the rear end of the shoe body, and the artemisia argyi insole with health-care effects is arranged on the upper portion of the shoe body. The positions of the massage beads are arranged according to the main acupuncture points of the foot sole, the acupuncture points have the health care effects, on the basis that the basic insole function is provided, the foot can be massaged, foot fatigue is relieved to a certain degree, and meanwhile the deodorization effect is achieved.

The invention belongs to the technical field of radish planting, and particularly relates to a planting method for increasing the content of bioactive substances of green radishes. The method specifically comprises the following steps that (1) green radish seeds are immersed in a seed soaking agent at the temperature of 42-44 DEG C for heat-preservation soaking, the agent is drained out, and the seeds are taken out, magnetized and dried, wherein the seed soaking agent is prepared from borax, zinc chloride, piperis longi polysaccharide, cynomorium songaricum polysaccharide, carambola leaf polysaccharide, jujube extract and water; (2) the green radish seeds treated in the first step are sowed in planting holes of planting land, wherein the sowing depth is 1.6-1.8 cm, one seed is sowed in each hole, and the hole distance is 36-38 cm; before sowing, composted meal manure is applied to the planting land, and a ferrous sulfate nutrient solution is sprayed on leaf surfaces once in the early growth stage of fleshy roots and the middle growth stage of the fleshy roots separately. By means of the method, the content of the bioactive substances such as carotenoid, anthocyanin and proanthocyanidin of the green radishes is effectively increased, and the nutrition and health care value of the green radishes is greatly improved.

Belonging to the technical field of biological agriculture, the invention provides a novel biostimulant and a preparation method thereof. The involved novel biostimulant takes beef extract as the mainraw material, is formed by EM inoculant anaerobic fermentation, and has a free amino acid content of greater than or equal to 10% and a trace element content of greater than or equal to 2%. The preparation method includes the steps of: preparing 5-6% of beef extract, 0.1-0.2% of potassium dihydrogen phosphate and 1.5-3% of an EM inoculant, supplementing water and stirring the substances uniformly, then conducting anaerobic fermentation at 35-37DEG C, 24h later, performing cooling to 30-35DEG C, and conducting anaerobic fermentation continuously for 7d, then performing bacteria inactivation bypasteurization principle, and successively adding not less than 0.3% of Cu<2+>, not less than 0.5% of Fe<2+>, not less than 0.4% of Mn<2+>, and not less than 0.8% of Zn<2+>. The stimulant disclosed by the invention is mainly prepared by biological fermentation, is free of chemical additive, does not generate wastewater, waste residue and the like, and is safe and environment-friendly, and has theefficacy of improving crop stress resistance, stimulating crop potential, increasing yield, improving quality and the like when applied to vegetables and other crops.

The invention discloses an individualized customizable portal method based on an open system. The individualized customizable portal method comprises the implementation steps that a component developer registers components and submits the components for approval after the development of the components is accomplished and the components pass the test, the components are released in a component store after an open platform portal system manager approves the components, and the component developer continues to improve the components and submits the components for approval again if the open platform portal system manager does not approve the components; the components are shown in the component store for sale, and all kinds of components are shown in the component store in a unified mode according to modes of classification, user's use frequency and system recommendation; a user can select favorite components in the component store to decorate the personal portal, and the system recommends the components of the same kind and the hottest components to the user according to the components selected by the user. Compared with the prior art, an ecological system among the user, a platform and the third-party developer is established, a user feedback platform performs surveillance audit, and therefore, the individualized customizable portal method based on the open system is high in practicability.

The invention relates to a fighting training dummy and a working method thereof, and belongs to the technical field of fighting training. The objective of the invention is to solve the problem that an existing fighting training dummy is not intelligent. The provided fighting training dummy is provided with boxing gloves, an upper supporting column, a waist moving mechanism, a lower supporting column and a fixed base plate of the fighting training dummy are sequentially connected from top to bottom, a shoulder moving mechanism is installed on the upper supporting column, and a bottom rotating device is connected with the lower supporting column. The controller is connected with the waist moving mechanism, the shoulder moving mechanism and the bottom rotating device, a positioning sensor is installed in the boxing glove, the AI intelligent camera is installed on the lower supporting column, the positioning sensor and the AI intelligent camera transmit obtained signals to the processor for processing, the processed signals are transmitted to the controller, and the controller controls the waist moving mechanism, the shoulder moving mechanism and the bottom rotating device to operate according to the obtained signals. According to the exercise state of the trainee, response is made in time, and the training effect is improved.

The invention belongs to the field of education supplies and particularly relates to a multifunctional child writing board. The multifunctional child writing board is characterized in that the writing board comprises a writing board body, an electronic reading machine and a video player; the writing board body is a white resin bottom board, guide rails in the vertical direction are arranged on the two sides of the writing board body, a bristle brush cross beam is arranged on the guide rails, and bristle brushes are arranged on the parts, on one side of the writing board body, of the bristle brush cross beam; the electronic reading machine is arranged on the right side of the writing board body and is readout through a special reading pen which is connected with the electronic reading machine; the video player is installed on the left side of the writing board body, and a control area at the lower end of the writing board body is provided with a control key, a USB interface and a DVD readout system. The multifunctional child writing board has the beneficial effects that traditional teaching tools such as a blackboard and chalk are replaced by combination of the writing board and the carbon pen, chalk dust is avoided during teaching, and good health of children is ensured; reading, writing and watching are integrally combined through the electric reading machine and the video player which are installed on the writing board, and an omnibearing and three-dimensional sensory effect is achieved; and accordingly, sensory abilities of the children to the environment are further stimulated, and the potentials of the children are motivated.

The invention relates to cage-type football sports equipment, which comprises a control mechanism, a power supply mechanism, an isolation zone, a goal and a scoring device; the isolation zone is an enclosed structure so as to form a field for football sports; an access door for players is opened in the isolation zone; the goal comprises at least two grids; each grid forms an independent shoot goal; and, each grid is provided with a light guiding mechanism and a goal sensing mechanism. The sport field is enclosed by the fence; the grid-shaped goal and the scoring device are arranged in the sport field; the goal is provided with the lamplight and the light curtain; the lamp lights up to indicate the shoot goal; the light curtain can sense whether the football enters the goal or not; and, theresult is displayed by the scoring device. Thus, the cage-type football sports equipment has both training and entertainment functions, is effective and helpful to improve the professional skill of the football lovers, increases the interactivity and the enjoyment, and motivates the potential of the players. The trouble for frequently picking up the football is overcame by the cage-type field; and moreover, the field can be smaller.

The invention discloses a medicine for treating closed soft tissue injury type ostealgia. The traditional Chinese medicine composition is prepared from the following raw materials: radix clematidis, radix angelicae, white mustard, centipede, scorpion, earthworm, folium artemisiae argyi, pepper, stir-baked squama manitis or pig nail, agilawood, frankincense, radix et rhizoma rhei, flos carthami, radix gentianae macrophyllae, radix angelicae pubescentis, ligusticum wallichii, radix saposhnikoviae, cortex erythrinae, angelica sinensis, prepared semen strychni, prepared radix aconiti, prepared kusnezoff monkshood root, prepared rhizoma arisaematis, lycopodium clavatum, garden balsam stem, radix aconiti agrestis, notopterygium root, rhizoma drynariae, peach kernel, radix paeoniae rubra, pseudo-ginseng, hematoxylon and pyrolusite. The medicine is applied in a hot compress physical therapy mode, has a remarkable curative effect on ostealgia symptoms such as rheumatism ostealgia under closed soft tissue, is simple in preparation method, convenient and rapid to use and free of environmental limitation, and is worthy of being popularized and applied in ostealgia treatment.

The invention belongs to the technical field of virtual simulation, and discloses a semiconductor oxide gas sensor virtual simulation experiment system and method.The semiconductor oxide gas sensor virtual simulation experiment system comprises a registration system, a student learning system and a background management system. The registration system is used for realizing an identity registration function of a user and providing a user name and a password for the user; the student learning system comprises a learning material module, an experiment module, a result submission module, a score acquisition module and a communication interaction module; and the background management system comprises a column management module, a content management module, a data statistics module, an experiment result acquisition module and a communication interaction module. According to the invention, students are taken as a main body and a target content of ability cultivation is taken as a center so that the enthusiasm of the students in experiment and practice can be improved, the practical ability of the students in solving complex chemical experiments and microelectronic processing technologies is improved, and scientific research type, innovative type and engineering type talents are better conveyed to the microelectronic field in China.

The invention discloses a vibration adjusting device based on a contact surface and a vibration adjusting method. The vibration adjusting device comprises a massage rod, a first control chip used for controlling the vibration speed of the massage rod, and a plurality of speed adjusting keys located on the first control chip, wherein the speed adjusting keys are capacitive sensors used for detecting the contact area of the speed adjusting keys and a finger, the speed adjusting keys are divided into a plurality of acceleration keys and a plurality of deceleration keys, when one speed adjusting key is pressed by the finger to obtain the contact area between the speed adjusting key and the finger, the first control chip can calculate the vibration frequency to-be-changed amplitude according to the contact area, and the first control chip adjusts the vibration frequency of the massage rod according to the calculated vibration frequency to-be-changed amplitude. According to the vibration adjusting device, the vibration frequency adjustment speed is high, the vibration frequency adjustment is convenient, the potential of women can be excited to the maximum extent, the purpose of adjuvant therapy is achieved, and meanwhile liquid flowing out of a vagina can be prevented from flowing onto a bed sheet.

The invention discloses an unmanned aerial vehicle flight transportation simulation racing track which comprises a frame body, a take-off and landing platform, a test platform and an objective table are arranged on the frame body, transfer objects with different sizes and shapes are arranged in the objective table, adsorption pieces are arranged on the transfer objects, the test platform is hollow to form a containing cavity, and the adsorption pieces are arranged in the containing cavity. A containing cavity is formed in the frame body, a lifting platform and a lifting air cylinder are arranged in the containing cavity, an ejector pin frame is arranged above the lifting platform in the containing cavity, a plurality of sliding holes are evenly distributed in the ejector pin frame, ejector pins are arranged in the sliding holes in a sliding mode, a ceiling is connected to the testing platform, and an object conveying channel is further arranged on the frame body. An inlet of the object conveying channel is arranged between the test platform and the objective table, the inlet of the object conveying channel is arranged along the vertical direction, and an outlet of the object conveying channel is arranged on the side wall of the accommodating cavity. The device is small in occupied area, is more comprehensive in test, can better stimulate the interest of participants through the test operation and the performance of the unmanned aerial vehicle, and facilitates the development of unmanned aerial vehicle teaching.

The invention discloses an indoor test operation method and device for asphalt mixture vibration mixing. Asphalt mixture vibratory mixing indoor test device includes mixing tank, rack, mixing tank vibrator, shock absorbing device, stirring motor, stirring shaft, stirring arm, stirring blade, shaft end sealing device, vibration motor, vibrator, material volume It consists of detection device, heating device, heater, electric control system, control panel and discharge door. The operation method of the vibratory mixing indoor test device for asphalt mixture realizes simultaneous heating of the mixing tank and the mixing shaft, controllable vibration frequency of the mixing tank and the shaft, controllable vibration amplitude, and controllable discharge volume. The invention is easy to operate, easy to popularize and apply, each material component is evenly redispersed, the porosity is reduced, and the mixing quality of the mixture is improved; it is of great significance for stimulating the potential of the material, improving the road performance of the asphalt pavement, and prolonging the service life of the asphalt pavement.

The embodiment of the invention provides a method and device for selecting a recent development area. The method comprises the steps of obtaining a first knowledge graph and behavior data of students; extracting learning features from the behavior data to fill the meta-information corresponding to the knowledge points, and calculating a meta-information capability value of each piece of meta-information and a knowledge point capability value between the knowledge points to obtain a personal capability model of the student; obtaining a group ability model, and calculating the individual mastering hierarchy of each knowledge point of the student according to the group ability model and the individual ability model to obtain the individual mastering hierarchy data of the student; and according to the personal mastering hierarchy data, the group mastering hierarchy data and the group capability model, obtaining the knowledge point with the maximum knowledge point capability value as the recent development area of the student. According to the method, the recent development area is adaptively recommended according to the gaps among the students, the groups and the teaching objectives, so that the potential of the students is stimulated, and the learning enthusiasm of the students is improved.

The invention discloses an unmanned aerial vehicle target shooting flight training racing track which comprises a take-off and landing platform, a flight platform and a target shooting platform, a flight channel is formed in the flight platform, a rotating shaft and a driving wheel are arranged on the target shooting platform, a driving rod is rotationally connected to the driving wheel, and the rotating shaft is rotationally arranged on the target shooting platform; a sliding groove is formed in one side of the sliding sleeve, the driving rod is in sliding fit with the sliding groove, a transmission straight gear is formed at one end of the transmission part, a transmission bevel gear is arranged at the other end of the transmission part, a first target is arranged on the transmission part, and the transmission straight gear is meshed with the driving rod; a reversing bevel gear is further rotationally arranged on the rotating shaft and located between the driven bevel gear and the transmission bevel gear, a second target is connected to the driven bevel gear, and the flight channel is as high as the first target and the second target. The operation flight target shooting ability of the unmanned aerial vehicle can be fully tested, potential and interests of participants can be better stimulated, and unmanned aerial vehicle design and development of programming courses are facilitated.

The invention discloses a polarization channel coding method of a wireless measurement-while-drilling system based on a Gray code structure. The method includes: constructing a polarization channel coding method according to the structure of the Gray code, and then using the coding method for wireless measurement-while-drilling In the channel coding module of the downhole instrument of the system; according to the channel coding method of the downhole instrument, a continuous elimination list (SCL) decoding algorithm is designed, and then the algorithm is applied to the decoding module of the ground instrument of the wireless measurement while drilling system to restore the downhole send data. The advantage of this method is that: since the constructed polar channel coding method has a Gray code structure, it has better bit error performance than ordinary polar codes, further stimulates the potential of polar codes, and effectively reduces the wireless measurement while drilling. The bit error rate of the system improves the reliability of the system.

The invention discloses development of a preparation process of a special polyglutamic acid biostimulant for traditional Chinese medicine planting. The biostimulant is composed of bacillus licheniformis, low-molecular polyglutamic acid generated by fermentation, added potassium humate, a seaweed extracting solution, urea, monopotassium phosphate, calcium hydrophosphate, ammonium bicarbonate, magnesium sulfate, ferrous sulfate, zinc sulfate and manganese sulfate. The special polyglutamic acid biostimulant for traditional Chinese medicine planting can fully stimulate the intrinsic potential of traditional Chinese medicine plants; meanwhile, low-molecular-weight polyglutamic acid and chelated medium trace elements are added, the slow release property is achieved, the utilization rate of a fertilizer can be increased, growth of the traditional Chinese medicine plants is promoted, the yield of traditional Chinese medicines is increased, cost is saved, and meanwhile, environmental pollution is reduced.