26results about How to "Keep breathable" patented technology

The invention provides a special fertilizer for highland barley in Tibet high-altitude areas, which specifically comprises a matrix, a base fertilizer, an organic fertilizer, a trace element fertilizer, a modifier and a nutritional agent in a mass ratio of 100: 50: 100: 1: 15: 3, the substrate comprises loam, river sand and bentonite; the base fertilizer comprises nitrogenous fertilizer, phosphatic fertilizer and potash fertilizer; the organic fertilizer comprises bran, decomposed straw, decomposed excrement, plant ash and aquatic animal powder; the modifier comprises wormcast, silkworm excrement, perlite and vermiculite; the nutritional agent comprises compound vitamins, glucose, honey and compound amino acids; the raw materials used in the method are green, safe and pollution-free, the soil structure is improved while nutrient substances needed by highland barley growth are provided, the bran, the straw, the decomposed excrement and other agricultural wastes are used, cost is saved, efficiency is improved, and the utilization rate of resources is increased.

The utility model discloses a sports shoe upper and a shoe, the sports shoe upper comprises a shoe upper base layer, the shoe upper base layer comprises a first splicing part, a second splicing part and a third splicing part, the first splicing part corresponds to a forefoot area and a heel area of a human foot; the second splicing part is positioned in the middle section area of the arch between the front sole area and the heel area; the third splicing part extends along the edge of the vamp, is connected with the sole and is connected with the first splicing part and the second splicing part; the fixing line is arranged at the junction of the first splicing part, the second splicing part and the third splicing part; the vamp base layer is formed by splicing a first splicing part, a second splicing part and a third splicing part, and the splicing parts are regions which are formed by weaving TPU yarns in an interweaving mode and have different weaving intensities. According to the sports vamp and the shoe, the softness and hardness of each part of the vamp base layer are adjusted by arranging the areas with different weaving intensities on the vamp base layer, the vamp fits the foot movement of a user, and the sports performance of the user is improved.

The invention relates to the technical field of fallen leaf cleaning, and discloses a hedge fallen leaf cleaning, blowing and sucking all-in-one machine which comprises a bottom plate, a supporting plate is fixedly connected to the top of the bottom plate, an engine is fixedly connected to the top of the supporting plate, a fan is fixedly connected to the output end of the engine, and a reciprocating assembly is arranged in the bottom plate. A swinging assembly is arranged on the outer wall of the bottom plate, two supporting rods are fixedly connected to the rear side of the top of the bottom plate, a filtering box is fixedly connected to the tops of the supporting rods, a filtering assembly and a cleaning assembly are arranged in the filtering box, and a collecting box is connected to the bottom of the filtering box through a connecting piece; the motor is fixedly connected to the interior of the bottom plate. By arranging a reciprocating assembly and a swinging assembly, a motor drives a sector gear to drive a gear ring and a sliding plate to reciprocate, then a first rack plate is linked to drive a half gear to intermittently rotate, and finally left-right swinging of a suction cup is achieved.

The invention relates to the technical field of fabrics, and particularly discloses an all-cotton moisture-absorbing and quick-drying fabric and a preparation method thereof. The preparation method comprises the following steps: S1, boiling and bleaching a cotton blank yarn, adding a reactive dye for dyeing treatment, then adding a hydrophilic auxiliary agent for hydrophilic treatment, and winding a dry yarn to obtain a hydrophilic cotton yarn for later use; boiling and bleaching the cotton blank yarn, adding a reactive dye for dyeing treatment, then adding a waterproof auxiliary agent for waterproof treatment, and winding dry yarn to obtain waterproof cotton yarn for later use; s2, the waterproof cotton yarn is coated with hydrophilic cotton yarn, and yarn of a coating structure is obtained; s3, weaving plain knitted fabric from the yarn with the wrapping structure through a circular knitting machine; the number of the hydrophilic cotton yarns is different from that of the waterproof cotton yarns, and the ratio of the hydrophilic cotton yarns to the waterproof cotton yarns is 0.25-1. According to the invention, the special wrapping structure yarn in which the hydrophilic cotton yarn with lower count wraps the waterproof cotton yarn with higher count is adopted for plain weaving, so that not only are the advantages of softness and breathability of a single-layer cotton knitted fabric reserved, but also the moisture absorption performance is good.

The vamp with the protective property and the air permeability comprises a vamp body, a plurality of TPU yarns are woven in an interweaving mode to form at least one TPU yarn arrangement layer, the TPU yarns are fixedly connected at the overlapping position in a hot melting press fit mode, and the TPU yarns are arranged on the vamp body. Breathable winding gaps are formed among the woven TPU yarns; a protective layer is compounded on the side, close to the foot, of the vamp body, the protective layer is formed by weaving materials with puncture resistance and cutting resistance, and the protective layer is provided with a breathable grid structure. According to the vamp with the protective property and the air permeability and the shoe, the vamp material with the protective property and the air permeability is adopted for the shoe, the effects of being simple in structure, good in air permeability and having the protective function are achieved, and safe, comfortable and healthy wearing experience is provided for a wearer.

The present application relates to the technical field of sanitary products, and particularly relates to a biodegradable nursing pad and a preparation process thereof. The nursing pad comprises a skin-friendly top layer, a composite core absorption layer and a gas-impermeable bottom layer from top to bottom. The composite core absorption layer comprises a gel-embedded skeleton composed of an air-laid wood pulp fiber web and a composite antibacterial hydrogel in-situ cross-linked and embedded in the pores of the web, and a fluff pulp fiber layer fixed to at least one surface of the skeleton. The composite antibacterial hydrogel comprises hydrophilic reinforcing fibers modified by a silane coupling agent with a hydrophilic group, a sodium alginate matrix and zinc ions. The nursing pad prepared by the present application has excellent rapid absorption, high antibacterial efficiency and high biodegradability, and solves the problem that traditional products are difficult to have both performance and environmental protection.

The invention discloses a method for preparing a waterproof hand-painted textile pigment. The waterproof hand-painted textile pigment comprises the following components in parts by weight: 60-70 parts of pure acrylic emulsion, 5-15 parts of pigment toner, 0.5-1.5 parts of thickener, 2-5 parts of ultraviolet absorber, 2-5 parts of antioxidant, 3-6 parts of cross-linking agent, 1-3 parts of leveling agent, 1-3 parts of waterproofing agent, 1-3 parts of film-forming aid, 60-70 parts of deionized water, 1-2 parts of mildewproof agent BCM, 1.5-2.5 parts of 202 defoamer, 2-3 parts of organosilicon quaternary ammonium salt, and 5-7 parts of softener. The problem of poor waterproofness and adhesion of traditional hand-painted pigments is solved, and the process of high-temperature baking required for coloring of traditional textile pigments is not required. It can be colored by drying naturally, and the softness of the fabric is not affected after drying. It has the characteristics of being washable, non-cracking, anti-friction and anti-sun. It is a new type of pigment that can be applied to carriers such as wall surfaces, clothes, shoes and hats, flower pots and gypsum.

The invention provides a nose heat preservation cover which comprises a mask body and a hot compress element, the hot compress element is transversely arranged in the mask body, and heat is generated on the outer side of the nose of a user after the hot compress element makes contact with air. Heating and heat preservation are conducted from the outer surface of the nose of the human body in a nose heat preservation mode, and then the temperature of the nasal cavity is kept instead of being adjusted in a mode of overall face heating and hot air mixed inhalation, so that the situation that a user feels unsmooth or uncomfortable in breathing when wearing the mask for a long time is reduced, and the user experience is improved. The nose can be heated for a long time, and the nose and the nasal cavity can be subjected to all-dimensional accurate heat preservation, so that the immunity is enhanced.

The utility model belongs to the technical field of soilless culture, and particularly relates to a planting groove for soilless culture, which comprises a groove-shaped main body, a partition plate is arranged in the main body, and the interior of the main body is divided into an upper-layer planting part and a lower-side water collecting part by means of the partition plate. A water through hole for water to flow between the planting part and the water collecting part is formed in the partition plate, and a liquid drainage hole is further formed in the portion, located on the side wall of the water collecting part, of the main body. According to the planting groove, the partition plate is used for forming the separated double-layer design, the planting part is communicated with the water collecting part through the water through holes, it is guaranteed that plant roots can absorb water, meanwhile, water accumulation is prevented, redundant liquid in the water collecting part can be drained in time through the liquid drainage holes, and therefore a certain space is reserved for ventilation of the plant roots.

The invention relates to a polyacrylate emulsion as well as a preparation method and application thereof. The polyacrylate emulsion comprises the following components: an acrylate polymer, an emulsifier and a solvent, wherein reaction monomers of the acrylate polymer comprise functional monomers and basic monomers, the functional monomers comprise alkyl acrylate, organic fluorine monomers and organic silicon monomers, and the basic monomers comprise soft monomers and hard monomers. The fabric finished by the polyacrylate emulsion provided by the invention has excellent waterproof and oil-proof performance while keeping air permeability and softness.

The utility model discloses a dish-washing machine mainboard with a waterproof structure, which belongs to the technical field of dish-washing machines, and comprises a shell with an opening at the top, a sealing cover fixedly connected to the top of the shell through a mounting mechanism, and a waterproof mechanism arranged on one side of the shell and comprising a communicating pipe communicated with one side of the shell, a waterproof breathable film is embedded in one side of the communicating pipe, an exhaust fan is fixedly assembled in an inner cavity of the communicating pipe, and clamping mechanisms are arranged on the two sides of the mainboard body. Through the structural design of the communicating pipe, the waterproof breathable film and the exhaust fan, the waterproof breathable film can effectively prevent liquid water drops from permeating and keep the surface of the mainboard body dry, meanwhile, the waterproof breathable film has certain breathability, water vapor can be discharged from the interior of the shell, ventilation and breathability in the shell are kept, and the service life of the mainboard body is prolonged. And heat and moisture in the air in the shell can be discharged through the communicating pipe and the exhaust fan, so that the effects of cooling and dehumidifying are achieved.

The utility model relates to the technical field of U-shaped pillows, and discloses a U-shaped pillow, which comprises a U-shaped pillow body, the U-shaped pillow body comprises a first branch part and a second branch part, one end of the first branch part is fixedly connected with an inserting block, one side of the second branch part is fixedly connected with a connecting sleeve matched with the inserting block, the outer wall of the connecting sleeve is fixedly connected with a connecting belt, and the connecting belt is fixedly connected with the inserting block. One side of the connecting band is fixedly connected with a hook-and-loop fastener loop face, the side, close to the hook-and-loop fastener loop face, of the connecting band is fixedly connected with a hook-and-loop fastener hook face adhered to the hook-and-loop fastener loop face, and the first supporting part is fixedly connected with a fixing ring matched with the connecting band. According to the U-shaped pillow, the U-shaped pillow body is composed of the first branch part and the second branch part, the U-shaped pillow can be normally used after the first branch part and the second branch part are combined together when the U-shaped pillow is used, and when the U-shaped pillow is not used, the first branch part and the second branch part can be detached and then stacked, so that people can carry the U-shaped pillow more conveniently when going out; and the U-shaped pillow can occupy smaller space when being placed.

The utility model discloses a bacteriostatic grounding bedding article which comprises a bed sheet or a pillowcase formed by weaving metal fiber yarns, cotton fiber yarns and tencel fiber yarns serving as warp yarns and weft yarns, and the bed sheet or the pillowcase is connected with a grounding wire with a plug through a grounding wire clamp. According to the utility model, excellent characteristics of moisture absorption, air permeability, smooth hand feeling, pilling resistance and the like of cotton fibers are retained, and the characteristics of antibacterial property and strong fiber rigidity of tencel fibers are utilized, so that the performance defects of the existing bedding articles are improved, and the bedding articles have better antibacterial property; by matching the plug with the existing household jack, static electricity generated by friction is conducted away, the body feeling comfort of a human body is improved, static current is prevented from flowing through the human body, harm of the static electricity to the human body is reduced, and human health is facilitated.

The invention is applicable to the technical field of textile treatment, and provides a preparation process of a wear-resistant shirt, which comprises the following steps: S1, selecting a shirt fabric which is good in air permeability and comfortable to wear, and performing preshrinking treatment on the fabric; s2, tailoring, piece checking, bonding, sewing and ironing are carried out, and a finished shirt is manufactured; s3, cleaning and pretreating the shirt; s4, immersing the shirt into the wear-resistant finishing liquid, and padding for 2-3 minutes through a padding machine; s5, the shirts subjected to padding are fed into a baking machine to be baked; s6, performing static equilibrium treatment on the baked shirt, and then washing to remove residues on the surface of the fabric; s7, the washed ready-made clothes are dried, and the temperature ranges from 60 DEG C to 90 DEG C; and S8, cooling the dried ready-made garment in a cooling room to obtain the wear-resistant shirt. According to the preparation process of the wear-resistant shirt, provided by the invention, the wear-resistant finishing liquid is used for finishing, so that the shirt fabric has excellent wear resistance, and meanwhile, the original comfort and air permeability of the fabric are kept.

The application discloses a sewage treatment VOCs gas treatment system and method, relates to the sewage VOCs waste gas treatment technical field, and the system comprises a vertical cylindrical adsorption tank, a tangential waste gas pipe is arranged at a horizontal tangent position of an upper portion of a side wall of the adsorption tank, an air outlet pipe is arranged laterally at a bottom portion, a regeneration pipe is arranged at a center of a top portion, and a discharge pipe is arranged at a center of the bottom portion; a self-driving assembly is coaxially arranged in a cavity of the adsorption tank, rotation power is provided by means of tangential air inlet cyclone, an extrusion roller assembly is fixed on the self-driving assembly, and an activated carbon adsorption filler layer is coaxially arranged on an upper side of the roller. The filler layer sleeve container is divided into four activated carbon filler cavities, a porous elastic diaphragm is arranged at the bottom of the cavity, a hollow jacking shaft and a multilayer stirring assembly are matched in the cavity, and a pre-loosening assembly is arranged at the center of the bottom surface of the diaphragm. The application has the advantages that the cyclone air inlet airflow is uniformly distributed, there is no external driving motor, electrical faults are eliminated, the filler has no adsorption dead angle, regeneration and desorption are sufficient, and the operation and maintenance cost and the activated carbon replacement cost are greatly reduced.

The invention discloses an exhaust filtering structure of a mixing granulator, and belongs to the technical field of granulator exhaust, the exhaust filtering structure comprises an exhaust pipeline, the lower side of the exhaust pipeline is provided with a cleaning chamber, the exhaust pipeline is internally provided with a filtering assembly, the filtering assembly comprises a rotating shaft and four supports, and the rotating shaft is rotatably connected in the cleaning chamber; the four supports are arranged on the rotating shaft in a circumferential array mode, and each support is provided with a filter plate. By arranging the rotating shaft and the support structure, the filter plate can be periodically fed into the exhaust pipeline to execute a filtering task, and after the filtering period is completed, the filter plate is automatically transferred into the cleaning chamber to be subjected to necessary cleaning treatment. The process does not need manual intervention, so that the operation difficulty and the maintenance cost are greatly reduced.

The invention discloses an amphiphilic multistage nano SiO2-based masonry cultural relic anti-weathering reinforcing material and a preparation method thereof, and relates to the technical field of cultural relic protection materials. The method comprises the following steps: preparing multi-stage nano SiO2 particles; in a water-paraffin oil two-phase system, a paraffin template is obtained; the exposed side of the SiO2 particles in the paraffin template reacts with an amino silane coupling agent to modify amino groups, then the other side of the paraffin template is modified with alkyl alkoxy silane or organosilicon quaternary ammonium salt, and amphiphilic Janus SiO2 nanoparticles are prepared; and dispersing the prepared amphiphilic Janus SiO2 nanoparticles into an organic solvent according to the mass fraction of 1 to 5 percent, so as to obtain the amphiphilic multistage nano SiO2-based masonry cultural relic anti-weathering reinforcing material. Based on the Janus SiO2 nanoparticles with three-dimensional multi-stage morphology, the anti-weathering agent is used for anti-weathering protection of masonry cultural relics, endows the masonry cultural relics with excellent hydrophobicity, antibacterial activity and surface reinforcing effect, and has excellent durability so as to keep a long-term anti-weathering reinforcing effect.

The utility model relates to the technical field of jean fabrics, in particular to tear-resistant and wear-resistant jeans which comprise a plurality of minimum cycle structure units, each minimum cycle structure unit is composed of twelve loop transverse rows and four loop longitudinal rows, and the twelve loop transverse rows are formed by sequentially and transversely arranging first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh and twelfth weft yarns; the first, third, fifth, seventh, ninth and eleventh paths of weft yarns are blended yarns, and the second, fourth, sixth, eighth and tenth paths of weft yarns are nylon fibers; the blended yarns are woven by combining cotton, polyester fibers and spandex; the tear-resistant wear-resistant jeans have the advantages that the cotton, the polyester fibers and the spandex are mixed, so that comfort and air permeability can be kept, and durability and elasticity of the jeans can be enhanced.

This utility model relates to the field of casual shoe technology and discloses a highly wear-resistant casual shoe, including a main shoe body. A main shoe sole is fixed to the bottom surface of the main shoe body. The main shoe sole includes an EVA outsole pad, and a frame pad is connected to the top surface of the EVA outsole pad around its perimeter. A bottom groove is formed inside the top surface of the EVA outsole pad, and a midsole pad is adhered to the top surface of the bottom groove. The bottom of this utility model consists of an EVA outsole pad and a TPU anti-slip pad layer. The EVA outsole pad provides rebound and shock absorption, improving wearing comfort, while the TPU material of the TPU anti-slip pad layer itself provides high anti-slip and wear resistance. Its friction and force mainly act on the protruding structures such as the anti-slip heel and anti-slip stripes. When the anti-slip stripes are under force, each group of anti-slip stripes is connected by longitudinal stripes to form a structural rib mesh, reducing the deformation caused by force, thereby ensuring the stability of the bottom anti-slip and wear-resistant structure. At the same time, the use of TPU material ensures high wear resistance.

The utility model discloses a classification screening device for bentonite production, and relates to the related technical field of classification screening for bentonite production, the classification screening device comprises a machine box, a rear machine shell is arranged on one side of the machine box, the rear machine shell is fixedly connected with the machine box through hexagon bolts, a servo motor matched with the rear machine shell is arranged on the inner wall of the rear machine shell, and the servo motor is connected with the rear machine shell through the hexagon bolts. The output end of the servo motor is connected with the input end of a speed reducer, an output shaft of the speed reducer is connected with rotating gears matched with the output shaft of the speed reducer, the rotating gears are symmetrically distributed, and one rotating gear is fixedly connected with the other rotating gear through a chain matched with the rotating gear. According to the classified screening device for bentonite production, the servo motor is matched with the speed reducer to operate to drive the rotating gear and the chain to rotate at a constant speed, so that the cleaning brush can rotate circularly, impurities and dirt on the coarse screen and the fine screen are cleaned, the air permeability and the filtering effect of the screens are kept, the blocking phenomenon of the screens is reduced, and long-term stable operation is kept.

The invention discloses a nursing trolley for old people, relates to the related technical field of nursing, realizes one-key folding conversion from a bed to a wheelchair through an innovative design, greatly meets daily movement and nursing requirements of the old people, and meanwhile, integrates an intelligent inflatable support cushion system, so that the nursing trolley is more convenient to use. The inflatable supporting cushion can automatically adjust pressure distribution according to the shape of a human body, the local compression time is shortened, bedsores are effectively prevented, dynamic air pressure adjustment of the inflatable supporting cushion is achieved through cooperation of a pressure exhaust valve and a small air compressor, dryness and ventilation of the mattress are kept, the bedsore risk is further reduced, and the health of a human body is guaranteed. In addition, the venturi tube principle is combined with high-speed airflow, continuous air flow can be provided for a pressed area, the skin is kept dry and comfortable, liquid medicine can be extracted from the medicine feeding bottle and atomized, accurate and uniform medicine application is achieved, and the automatic medicine feeding mode greatly improves treatment pertinence and efficiency.

The invention discloses an efficient moisture-absorbing, breathable and self-cleaning automotive interior non-woven fabric and a preparation method thereof.A modified collagen fiber net has a super-hydrophobic structure and a super-hydrophilic structure, and the surface of the super-hydrophilic structure is tightly attached to a modified lyocell fiber net, so that the non-woven fabric has the moisture-absorbing, breathable and self-cleaning ability while having the moisture-absorbing, breathable and self-cleaning ability; the non-woven fabric is made of a porous material with a low shrinkage rate, so that the pore size of the non-woven fabric can be kept when the temperature rises, and the non-woven fabric has temperature change resistance and has good moisture absorption and air permeability and self-cleaning performance when the temperature rises; freeze drying is used for treating the fibers, moisture is directly sublimated from a solid state to a gaseous state at a low temperature, the moisture in the fibers is eliminated, an aerogel structure is formed, thermal stress caused by moisture evaporation is reduced, the performance of a porous structure can be improved, thermal shrinkage generated during heating can be avoided, and the thermal conductivity of the fibers is improved. Therefore, the pore structure, moisture absorption and air permeability of the non-woven fabric are maintained when the temperature rises.

The invention discloses a fitting printing method of a cool printing material. The fitting printing method comprises the following steps: selecting cool printing base cloth and cool printing patterns; carrying out preshrinking treatment on the cool-feeling printed base cloth; the preshrinked cool printing base cloth is conveyed to a cloth feeding device to be printed with cool printing paste and enters a rubber blanket after passing through a cloth pressing roller, a net aligning device is adjusted to be aligned with a net plate, and the pressure and angle of a scraper are adjusted; and after printing is completed, drying, cloth discharging and shaping are carried out. The invention develops a printing technology with a cool feeling function by applying the cool feeling material as the printing paste to the piece decoration printing. The technology not only endows the fabric with a cool feeling effect, but also enables the fabric to keep good air permeability and have a certain shaping function, the additional value and the use comfort of the fabric are improved, and the technology has important practical significance and market value.

This utility model discloses a bank protection reinforcement device for soil and water conservation, relating to the field of bank protection reinforcement technology. It includes a modular reinforcement component, a flexible anchoring component, and an ecological buffer component. The ecological buffer component is fitted and covers the surface of the riverbank soil, the modular reinforcement component covers the outside of the ecological buffer component, and the upper and lower ends of the flexible anchoring component are inserted into the riverbank soil, with the main body of the flexible anchoring component covering the surface of the modular reinforcement component. The modular reinforcement component includes several rectangular frames. This utility model adopts a three-layer protective structure of ecological buffer component, modular reinforcement component, and flexible anchoring component, forming a three-dimensional protection system from the inside out. The ecological buffer component fits against the riverbank soil, initially dispersing the stress on the soil; the modular reinforcement component forms rigid support with the hollow reinforcement unit through the rectangular frames, and the cross-shaped reinforcing ribs on the inner wall of the reinforcement unit further enhance the structural strength, effectively resisting water erosion and wave impact.

The invention discloses an indoor coprinus comatus planting and fruiting device which comprises a fruiting frame arranged in a planting shed, the fruiting frame is longitudinally divided into multiple layers, and multiple sets of fruiting frames are evenly arranged on each layer; the fruiting frame is of a cuboid structure with the peripheral side faces closed, a plurality of drainage and ventilation holes are formed in the bottom of the fruiting frame, and the bottom of an inner cavity of the fruiting frame is filled with thick nutrient slurry. The nutrient slurry formula is formed by blending granular clay or sandy soil and nutrient water, the thick nutrient slurry is filled with a round fungus bag, the round fungus bag is a coprinus comatus strain, and the round fungus bag is covered with a granular clay layer; the position, 1 cm below the horizontal diameter line, of the circular fungus bag is immersed in the mud. The indoor coprinus comatus planting and fruiting device is reasonable in structure, accurate in nutrition supply, excellent in ventilation and drainage performance, good in fruiting guidance quality and convenient for standardized operation.

The invention discloses a sunscreen heat-shielding skin-beautifying fabric which comprises a recessive printing layer, a dominant printing layer, a heat-shielding anti-ultraviolet layer and a skin-beautifying layer. The functionality of the fabric is the grey yarn characteristic, the water resistance is more outstanding, the fabric is not prone to losing efficacy due to cleaning, the function is more durable and stable, and the breathability and comfort of the fabric can be kept. The test effect of multiple functions is good, different from the extreme pursuing of a single function in the market, other functions are weakened, and the wearing comfort is improved. The sunscreen fabric has the advantages that the sunscreen core requirement of consumers is met, the sunscreen fabric further has the functions of heat shielding, skin care and deodorization, unique patterns can be displayed after the consumers sweat during sports, and the unique wearing experience requirement of the consumers is met. The multifunctional sunshade can meet various wearing scenes from outdoor sports to work commuting, leisure and entertainment, daily life and the like, and compared with a sunshade, a sunhat, a skin care product and the like, the multifunctional sunshade is simple, convenient, lasting in effect and high in cost performance.