53 results about "Color of water" patented technology

The present invention relates to a sewage regeneration treatment process for oil-refining industry and petro-chemical industry. Said treatment process system includes suspension filler biological contact oxidation depth treatment, flocculating setting quartz sand filtration, ozone partial oxidation, biological active carbon and disinfection treatment units. Its application range is extensive, operation stability is good, impact resistance is strong and pollutant-removing efficiency is high. It not only can completely remove SS of outward-discharged water, its turbidity, can effectively reduceCODcr, NH3-N, BOD5, oil, sulfide and phenol, etc., but also has the obvious effect for removing macromolecular organic matter, and can completely remove colour for water, and its energy consumption is low, its regenerated water is good in quality.

The invention belongs to the field of cultivation and particularly relates to a loach larva cultivating method. The method includes the following steps that firstly, breeding and oviposition are performed; secondly, eggs are put into an incubation pool to be incubated evenly, an oxygen boosting rod is placed beside the pool, the oxygen boosting rod is placed at the bottom of the pool after loach larvae get out of membranes, and the loach larvae are cultivated; thirdly, pond cleaning medicine is used for cleaning the pond, water filling and fertilizing are started three days later, and when the color of water of the pond is cultivated to be yellow green, the loach larvae are put into the pond; fourthly, before the loach larvae are put into the pond, the loach larvae are put into oxygen bags at first, the oxygen bags are put into the pool for buffering and then, the loach larvae are put into a net box; fifthly, milk powder and quail egg yolk are used as bait for feeding the loach larvae; sixthly, powder materials starts to be cast after seven to ten days. The rate of survival of the larvae cultivated with the loach larva cultivating method is improved to be more than 35%. By adjusting the position of the oxygen boosting rod, the density of the eggs can be adjusted, workloads are reduced, the cost in cultivating the larvae is reduced and economic benefits are boosted.

The invention relates to a traditional Chinese medicinal extract used for controlling viral diseases in aquiculture and a preparation method thereof. The traditional Chinese medicinal extract used for controlling viral diseases is prepared by the following major materials according the part by weight: 40 to 60 of rhubarb, 20 to 40 of membranous milkvetch root, 15 to 25 of pilose asiabell root, 20 to 25 of pomegranate bark, 15 to 25 of indigowoad leaf, 20 to 30 of indigowoad root, 15 to 25 of Epimedium, 20 to 30 of divaricate saposhnikovia, 15 to 25 of Peucedanum, 10 to 20 of liquorice root and 20 to 30 of peppermint. The preparation method comprises the steps as follows: weighing the materials, grinding, extracting with an ethanol aqueous solution twice, collecting filtrates, and distilling the filtrates under reduced pressure to obtain the traditional Chinese medicinal extract. The extract can regulate the color of water and improve feed attractant in aquatic animals, has the characteristics of removing heat and toxic substances and improving immunity of aquatic animals, can inhibit the growth and reproduction of bacteria and viruses, and is used for treating various diseases caused by bacteria and viruses. The extract is convenient to administrate and has no drug residues or toxic side effects.

When three primary color inks and a particular color ink having a hue different from those of the three colors are used, the number of passes with regard to the same printing area is changeable, thereby speeding up a printing operation and improving color development at a gamut expressed by the particular color ink to achieve high quality images. Use or non-use of the particular color ink is switched according to the number of passes corresponding to quality information. If a high speed data generation processing is not required but sufficient color development is achieved, namely if the number of passes is large, the use of the particular color will expand the color reproduction gamut. If the high speed is required, namely if the number of passes is small, non-use of the particular color ink will reduce the number of colors of the usable inks.

Cultured Penaeus vannamei Boone has the advantages of high growth speed, strong adaptability and high yield and becomes one of the main cultured varieties in northern areas of China. (1) pond water color control: the ideal color of water for culturing the Penaeus vannamei Boone is yellow green or yellow brown formed by green algae or diatoms; the algae or diatoms are benign biocenosis in the micro-ecological environment of a pond and play a role of purifying water quality; (2) control of pond water pH value, dissolved oxygen and transparency: the pH value suitable for the Penaeus vannamei Boone is 7.8-8.5, but the peak value of 9.2 is generated at the middle and final stages culturing, and therefore, the pH value control is especially focused in the culturing process; the pH value is not suitable to be high, otherwise, the toxicity of ammonia nitrogen can be increased, thereby restraining the growth of the Penaeus vannamei Boone; (3) scientific bait casting: generally, low-cost iced fish cream or small shells are fed, and some formula feeds are also fed; the formula feeds can be manually compounded; the formula feeds contain the following components: 17 percent of fish meal, 40 percent of soya-bean cake, 28 percent of bran, 10 percent of wheat middling, 3 percent of bone meal and 2 percent of additive; and (4) pond patrol: the pond is patrolled in the morning, at night and in the midnight every day to observe the water color change and whether Penaeus vannamei Boone raise above water to breathe or not; the activity condition, the growth condition and the repletion rate of the Penaeus vannamei Boone are observed by adopting two methods of lamplight observing and spoon-net inspection so as to regulate the bait casting amount and decide whether to start an oxygen-enriching machine or not.

The invention relates to a method for preparing an iron oxide black water-based color paste with high performance-price ratio. The fundamental formula of the iron oxide black water-based color paste comprises the following component in percentage by weight: 15-30 percent of water, 3-10 percent of humectant, 1.5-3 percent of wetting agent, 4-7 percent of dispersant, 0.2-0.5 percent of AMP-95 multifunctional additive, 40-60 percent of iron oxide black powder, 0.2-0.5 percent of thickening anti-settling agent, 0.1-0.3 percent of bactericidal agent and 0.1-0.5 percent of antifoaming agent. The iron oxide black water-based color paste has the characteristics of excellent storage stability, high dyeing power, good compatibility and the like, has high performance, economical efficiency and an environmental-protection effect, and is the iron oxide black water-based color paste with high performance-price ratio; and the iron oxide black water-based color paste is widely used for coloring of water-based building coatings, water-based woodwork coatings, water-based automobile coatings, water-based paper coatings, water-based plastic coatings, water-based glass coatings, water-based leather coatings, water-based ink and the like.

A fishing light device and the usage of the device. The fishing light device is capable of appropriately controlling a light-emitting condition based on various pieces of information on fishing operation, such as the color of water in an operation sea area, meteorological, oceanographic, and insolation conditions, kinds, positions, depths, and behavior of living things to catch, fishing gear, and the position and behavior of a fisher boat. A fishing light device (1) has a fish attraction lamp (3) having a light source formed by assembling together light-emitting diodes and a light source-controlling section (2). The light-emitting diodes have different emission colors. The light source-controlling section (2) varies a light-emitting condition of the light source according to operation information including the condition of a sea area and the kinds of living things to catch.

An ink composition for ink-jet printer contains dye for giving colour to ink, solvent for dissolving the said dye, and interfacial agent with high EO mole number for improving the viscosity of ink, and effectively preventing implicated dyeing of ink and reducing the degree of water permeation.

The embodiment of the invention provides a water color detecting method and device based on an MODIS image. The method comprises the steps of acquiring the MODIS image which reflects the color of water and is provided with an RGB band combination; converting the RGB value of each pixel of the MODIS image into tristimulus values; calculating the chromaticity coordinates of each pixel in a chromaticity diagram coordinate system based on the tristimulus values of each pixel; calculating the new coordinates of the chromaticity coordinates of each pixel in a predetermined coordinate system; calculating the included angle between the new coordinate point of each pixel and the X axis of the predetermined coordinate system; determining the color dominant wavelength of each included angle according to the corresponding relation between a predetermined included angle and a color dominant wavelength, and determining the water color level of each included angle according to the corresponding relation between the predetermined included angle and the water color level; determining water color according to the determined color dominant wavelengths and the determined water color levels. By the adoption of the embodiment, macroscopic wide-range long-term remote sensing detection of water color is achieved in a remote sensing way.

The invention relates to a filter medium used for removing the color, the peculiar smell and the colloidal substances in water, as well as the preparation method thereof, a filter core using the filter medium, a water purifier and a drinking water dispenser. The preparation method of the filter medium used for removing the color, the peculiar smell and the colloidal substances in the water comprises the following steps: firstly, raw materials containing active carbon, ultrahigh molecular weight polyethylene and attapulgite powder are mixed, and the step is characterized in that the weight ratio of the active carbon, the ultrahigh molecular weight polyethylene and the attapulgite powder is 50-200:100-300:5-50; secondly, the mixture obtained from the step one is pressed, sintered and cooled in a mold. Using the filter medium can remove the color, the peculiar smell and the colloidal substances in the water, so as to improve the sensory indexes of the drinking water.

The invention discloses a composite flocculating agent for treating urban sewage, which belongs to the field of environmental protection and particularly relates to a composite flocculating agent fortreating urban sewage. The components of the composite flocculating agent of the invention are kieselguhr and polyaluminium chloride (PAC) in a weight ratio of 50-100:10-20. For each ton of waste water, 10 to 20 grams of kieselguhr and 50 to 100 polyaluminium chloride are added. The kieselguhr has strong absorption capacity and excellent COD, BOD, SS and total phosphorus absorption capacity. The polyaluminium chloride is added to generate a large amount of floc particles in solution of waste water and reduce the color of water.

A printer comprises an ink-jet head, and a control unit which has a judgment pattern printing control section. When a judgment pattern is printed, the judgment pattern printing control section allows the discharge of ink droplets of a second color to an area on which ink droplets of a first color are to be landed, before discharging the ink droplets of the first color having a small color difference with respect to a color of a medium. Accordingly, the ink discharge malfunction is reliably judged for the nozzle irrelevant to the color of the recording medium and the color of the ink discharged from the ink-jet head.

The invention relates to a preparation method for a multi-purpose iron oxide red water-based color paste. The basic formula of the water-based color paste involves: 10%-25% of water, 3%-10% of a moisturizing agent, 1.5%-3% of a wetting agent, 3%-7% of a dispersing agent, 0.3%-0.6% of an AMP-95 assistant, 40%-70% of iron oxide red powder, 0.3%-1.0% of a thickening anti-settling agent, 0.1%-0.3% of a fungicide, and 0.1%-0.5% of a defoaming agent. With the characteristics of good storage stability, high tinting strength, and good compatibility, etc., the iron oxide red water-based color paste has high performance, economical efficiency and environmental friendliness, is a highly cost-effective multi-purpose iron oxide red water-based color paste, and can be widely used in coloring of water-based architectural coatings, water-based wood coatings, water-based automobile coatings, water-based paper coatings, water-based plastic coatings, water-based glass coatings, water-based leather coatings and water-based ink, etc.

Color production with high chroma in a low lightness portion is realized by using an appropriate complementary color ink to a particular color ink reproducing the low lightness portion. More specially the device secondary color G-K is reproduced with ink of the pure color component composed of the color mixture of the particular color G ink and the basic color Y ink to tone the particular color G ink. In addition, as complementary color components, the particular color R ink and K ink are used. Thereby, the reproduction line is substantially linear from the device secondary color G point to the device K point. In color reproduction at the dark portion of the color on the G-K line, sufficient chroma can be obtained.

Color production with high chroma in a low lightness portion is realized by using an appropriate complementary color ink to a particular color ink reproducing the low lightness portion. More specially the device secondary color G-K is reproduced with ink of the pure color component composed of the color mixture of the particular color G ink and the basic color Y ink to tone the particular color G ink. In addition, as complementary color components, the particular color R ink and K ink are used. Thereby, the reproduction line is substantially linear from the device secondary color G point to the device K point. In color reproduction at the dark portion of the color on the G-K line, sufficient chroma can be obtained.

The invention relates to a culture method for soft-shelled turtles, in particular to a culture method for tea-flavored soft-shelled turtles. The invention mainly solves the technical problem of how to digest, absorb and utilize the nutrient trace elements of green tea for conversion in soft-shelled turtles after green tea powder is added into the feed of soft-shelled turtles. The steps of the culture method are as follows: preparation of puffed feed: feed materials containing the green tea powder are poured into puffing equipment, and after continuous mixing, heating, pressurization, cooking, extrusion out of a mold hole and depressurization, the puffed feed is produced; the formula of the puffed feed and the percentages by mass of the ingredients are as follows: 25 to 35 percent of fish meal, 19 to 25 percent of fermented active soybean meal, 4.5 to 6.5 percent of puffed pig blood powder, 5 to 10 percent of fly maggot powder, 14 to 16 percent of Alpha starch, 7 to 9 percent of puffed corn starch, 5 to 7 percent of yeast, 1 to 2 percent of multiple vitamins, 0.5 to 1.5 percent of multiple mineral substances, 0.1 to 1 percent of monocalcium phosphate, 0.1 to 1 percent of choline chloride and 2 to 4 percent of green tea powder; soft-shelled turtles are then fed two times or more than two times each day according to 0.5 to 2 percent of the weight of the soft-shelled turtle; the color of water needs to be kept normal, and after being cultured for 150 days, grown soft-shelled turtles, each of which is equal to or more than 600g, can be yielded.

The invention relates to a preparation method for a multipurpose iron oxide yellow water-based color paste. The basic formula of the water-based color paste involves: 12%-30% of water, 5-10% of a moisturizing agent, 1.5%-3% of a wetting agent, 4%-7% of a dispersing agent, 1.0%-1.5% of an AMP-95 assistant, 45%-65% of iron oxide yellow powder, 0.05%-0.3% of a thickening anti-settling agent, 0.1%-0.3% of a fungicide, and 0.1%-0.5% of a defoamer. With the characteristics of good storage stability, high tinting strength, and good compatibility, etc., the iron oxide yellow water-based color paste has high performance, economical efficiency and environmental friendliness, is a highly cost-effective multipurpose iron oxide yellow water-based color paste, and can be widely used in coloring of water-based architectural coatings, water-based wood coatings, water-based automobile coatings, water-based paper coatings, water-based plastic coatings, water-based glass coatings, water-based leather coatings and water-based ink, etc.

The invention discloses a domestication method for microorganisms for performing purification treatment on cold-rolling organic wastewater. The domestication method comprises the following steps: step S1, injecting clean water into a biological contact oxidation tank, starting aeration, and feeding a strain and a nutritional agent; step S2, continuously culturing the strain for one week to ensure that aerobic microorganisms are gradually reproduced until successfully forming a bio-film; step S3, adding the cold-rolling organic wastewater into the biological contact oxidation tank, and stopping feeding water until the color of water in the biological contact oxidation tank is changed into green brown from yellow brown; step S4, increasing the aeration amount to perform stuffy aeration culture; step S5, gradually increasing the water feeding load, and continuously repeating the process from the step S3 to the step S4 until the water feeding load exceeds 300% of the design load to successfully domesticate the aerobic microorganisms. According to the domestication method disclosed by the invention, the cultured and domesticated aerobic microorganisms can have stronger vitality and higher capacities of degrading organic matters in the wastewater after generating variations so as to ensure that the cold-rolling high-concentration organic wastewater can be treated and can meet the discharge standards, and the running cost can be greatly reduced.

The invention discloses a coating circulating water purifying agent. The purifier comprises an agent A and an agent B, wherein the agent A is prepared from components in parts by weight as follows: 1.5-2.5 parts of sodium bentonite, 0.2-0.5 parts of chitosan, 0.5-1 part of a surfactant, 1.5-2.5 parts of a penetrating agent, 2-3 parts of a dispersant, 1-2 parts of a preservative, 0.5-1 part of an antifoaming agent and 87.5-92.8 parts of water; the agent B is prepared from components in parts by weight as follows: 0.2-0.4 parts of cationic polyacrylamide, 0.1-0.2 parts of a citric acid aqueous solution, 1-2 parts of an aluminum sulfate aqueous solution, 0.7-1 part of an ammonium bicarbonate aqueous solution and 96.4-98 parts of water. The coating circulating water purifying agent has the advantages of being good in paint debonding effect, good in flocculation effect, high in paint slag removal rate, low in paint slag moisture content, capable of completely removing foreign colors of water and inhibiting foreign odors of circulating water and the like.

In image processing, it is possible to suitably reduce density unevenness and graininess according to the ink used in printing. More specifically, when dividing multi-valued data and generating data for 2-pass multi-pass printing, in addition to divided multi-valued data for each of the two passes, divided multi-valued data that is common to the two passes is also generated. Moreover, quantized data of that common multi-valued data is reflected on the quantized data for each of the passes. Furthermore, when generating the quantized data, the division ratios used when generating the common data using the aforementioned multi-valued data division are set according to the colors of ink used in printing. By doing so, it becomes possible to suitably reduce density unevenness and graininess according to the colors used in printing.

The invention particularly relates to a superfine powder biological fertilizer for aquiculture. The superfine powder biological fertilizer is characterized in that the biological fertilizer comprises effective elements in percentage by pure nutrients as follows: larger than or equal to 18.5% of nitrogen, larger than or equal to 13.0% of phosphorus pentoxide and larger than or equal to 1.0% of potassium oxide, wherein the number of living bacteria in a bacillus subtilis microbial agent is at least 108 cfu / g; after raw materials are mixed and subjected to superfine grinding, the biological fertilizer with particle diameters smaller than or equal to 120 meshes or larger than 200 meshes accounts for 38%, the biological fertilizer with particle diameters smaller than or equal to 200 meshes accounts for 37%, and the biological fertilizer with particle diameters larger than 120 meshes accounts for 25%. As for an intensive culture pond and a large water surface, the proportion of nitrogen and phosphorus in water is adjusted, and an algal phase is adjusted, so that physicochemical and biological factors of the water are more suitable for growth of fishes. The color of water in a fertilization area is good, the nutrient utilization rate is high, the culture survival rate is remarkably increased, the incidence rate is reduced by about 50%-70%, the use quantity of culture medicines is reduced by 43%-45%, and the income from every 666 m<2> of the water surface is increased by 100-200 RMB yuan.

This invention is water and fire compatible water heater. It mainly includes shell, fan, and burner, atomization spraying device, heat exchange room, base seat reservoir and exhaust mast. Its shell is fixed on base seat and is inner and outer separated two layers barrel type, hot wind reflection cope is set on shell, the cope is separated with inner shell up space, water and fire compatible heat exchanger room is between inner shell and outer shell. Atomization spraying device is set in heat exchange room outside inner up end, fan is set under burner and coaxial fixed in inner shell, blast up towards. Air inlet at left end of base seat is interconnected to inner shell down part, hot water reservoir is at right end of base seat, the reservoir is interconnected to heat exchange room and excess heat recovery device and water and gas separating device. The advantage is that high efficiency is high and it is more than 93% when the fuel is diesel fuel, and higher when fuel is gas. The pollution is little, original quality and color of water intake machine can be kept by heated to hot water. A great deal of 50~850C hot water can be provided to heating, bath, refrigeration, industrial and agriculture generation. The heating speed is fast, hot water can be provide after 30 seconds of ignited.

The invention discloses an intelligent water dispenser based on a water volume detection system. The intelligent water dispenser includes a water dispenser box and is characterized in that a smart seat is installed at the top of the water dispenser box, and an accumulative flowmeter and an instantaneous flowmeter are installed on the low portion of the smart seat; the upper portion of the front face of the water dispenser box is provided with a liquid crystal display screen and heating indicator lights; the lower portion of the front face of the water dispenser box is provided with a water taking manipulation area, the top of the water taking manipulation area is provided with a first color sensor and a second color sensor, the middle of the water taking manipulation area is provided with a hot water valve and a cold water valve, a temperature sensor is installed at the base of the hot water valve, and the temperature sensor is electrically connected with a communication port of a controller. In actual tests, the intelligent water dispenser based on the water volume detection system is stable and reliable in performance, clearly distinguishes colors of water cups and accurately counts the volume of taken water without errors, so that a student is able to master the his / her own everyday water intake in time and know about the regular times for drinking for each month, the healthy growth of the human body is promoted, and the intelligent water dispenser based on the water volume detection system is suitable for popularization and application.

The invention relates to a smoking reminder which comprises a lung model and a control module, wherein the control module controls the lung model and consists of a control circuit, a heating device, a water box and a smoke sensor, the heating device consists of resistance wires, the heating device and the water box are arranged in the lung model and a smoke reactor in the control module is installed outside the lung model. Based on the principle that the color of water turns deep when colored paper is put into water, color in the lung model is controlled by the control circuit to get deeper and deeper with the change of smoke in the environment, and then a smoker is reminded of the severity of smoking visually.

The invention relates to a game device, and in particular relates to a water jetting game device for children. The technical problem to be solved by the invention is to provide the water jetting game device for children by which a user does not need to directly touch water, clothes are not prone to wet, a splash of water to human bodies is avoided, and thus the user is prevented from getting cold and aggravating the state of an illness, and water can be colored. In order to solve the above technical problem, the invention provides such water jetting game device comprising a water tank, wherein a water pumping device is arranged at the middle part of the top outside the water tank, a water intake pipe is connected with the water pumping device, the tail end of the water intake pipe is positioned in the water tank after penetrating through the middle part of the top of the water tank, a sucker is installed at the tail end of the water intake pipe, a check valve is arranged on the water intake pipe, and a water jetting device is arranged on the left of the top outside the water tank. The water jetting game device provided by the invention achieves the effects that the user does not need to directly touch the water, the clothes are not prone to wet, a splash of water to human bodies is avoided, and thus the user is prevented from getting cold and aggravating the state of an illness, and the color of water can be adjusted.

The invention relates to a seepage deformation test method for the dam body seacoast structure weak rock zone of a hydropower station, which is characterized in that holes are dilled on exposed faultage and the fracture zones thereof, then pressurized-water test is performed on positions where seepage deformation is possible to be caused, operators increase the water pressure gradually, observe and measure the seepage discharge beside the dam body faultage, adopt a water sample for simple analysis of water quality, measure the mud content of the water, and also directly observe the condition of the faultage and the fracture zones thereof to further measure the needed test data. The method greatly increases the water pressure value, improves the hydraulic slope of the structure weak rock zone in a test zone and facilitates the observation of a seepage zone and data acquisition for the conditions such as water discharge, water color, water quality change and mud content change, the argillization and softening conditions of faultage zone substances, the destructional forms of the faultage zone, and the like. Through the field data, the invention can quantificationally confirm critical hydraulic slope caused by seepage deformation damage and damage hydraulic slope which are generated in fracture zones of faultages.

This invention relates to a photopolymerizable resin composition which exhibits appropriate optical density and adequate hydrophobicity upon formation of a film and is thus useful in preventing color mixing or position deviation of color ink upon injection of color ink through a jetting method using an ink-jet print into regions defined by barrier ribs (a light shielding film) formed using the photopolymerizable resin composition.

The invention provides a rhodium liquid manufacturing method. The method includes: adding rhodium powder and analytically-pure potassium hydrogen sulfate into a crucible, well mixing, uniformly covering with analytically-pure potassium hydrogen sulfate, putting the crucible in a muffle furnace, cooling, transferring mixed liquid into a beaker to dissolve by heating, filtering in a hermetic filterconical beaker through qualitative filter paper for a circulating multi-purpose vacuum pump, adding analytically-pure sodium hydroxide, standing to realize complete precipitation, and after water is clear and colorless, removing clear water in the beaker while keeping yellow solution; continuously and repeatedly filtering the kept solution by fine qualitative filter paper, transferring into another beaker, adding an appropriate amount of analytically-pure sulfuric acid, well stirring, adding an appropriate amount of ionized water, and heating while stirring until the solution is transparentlybrown. In normal use of rhodium liquid prepared according to the method, coating brightness is in a range of + / -0.5 stably, and formulation simplicity, easiness in operation, high utilization rate andcost reduction are realized.

The invention discloses a color removing water treatment method, and belongs to the technical field of water treatment. The color removing water treatment method comprises the following steps: adding an aluminum flocculating agent into raw water for flocculation reaction, wherein the aluminum flocculating agent absorbs or reacts with materials generating chromaticity in the raw water to form alum floc; removing the alum floc through precipitation and filtering; filtering with activated carbon, so as to improve the quality of water. According to the method, color of surface water with a certain chromaticity is removed completely with the aluminum flocculating agent of which the cost is very low, wherein the chromaticity is caused by rotted leaves, and is 250 or higher. Treated according to the method, the chromaticity is reduced to 10 or lower. The color of water treated according to the method does not change even when water is placed for three months, and the chromaticity is still 10 or lower, and the water quality meets the standard requirement. According to the method, as the proper flocculating agent is adopted to remove color of low-temperature low-turbidity raw water, the alum floc generated after flocculation is large and easy to be treated through precipitation.

The invention discloses an atomization device for strollers. The atomization device comprises an atomization piece, an atomization driving plate, LED lamps, a water tank and a connection piece. The atomization piece is connected with the atomization driving plate. The LED lamps are mounted on the atomization driving plate evenly. The water tank is connected with the atomization piece. The atomization device has the advantages that the atomizing piece can atomize water to achieve spraying effect; the color of water mist is decorated by the colored LED lamps, and vivid effect can be realized after the atomization device is mounted to the tail of a stroller.