209results about How to "Meet energy needs" patented technology

A two-phase milk substitute instead of foremilk and milk for calf is prepared from the vegetative protein (soybean protein), whey powder, water-soluble fat, digestion assistant, minerals and vitamins.

The invention discloses a weight-loss health-care food which is prepared from the main raw materials of, by weight, 1-60% of a white kidney bean extract, 1-50% of L-malic acid, 1-65% of L-carnitine tartrate, and 1-40% of konjac powder. The invention also discloses a preparation method of the weight-loss health-care food. The method comprises the step that: the main materials of the white kidney bean extract, L-malic acid, L-carnitine tartrate, and konjac powder are well mixed, such that the health-care food with weight-loss function is obtained. With the health-care food, starchy substance absorption is inhibited, body metabolism is promoted, and energy conversion is promoted, such that fat consumption is increased, fat formation is prevented, and a weight-loss function is achieved. With the preparation method, absorption of nutrients such as proteins and vitamins is not influenced, diet control is not needed, and weight can be naturally controlled and reduced. The preparation method provided by the invention has the advantages of simple process, no high-temperature operation, convenient operation, and energy saving.

The invention discloses an energy efficiency optimizing and dispatching system for cold, heat and electricity triple supply equipment. A process interface module is connected with a cold, heat and electricity triple supply subsystem and a load subsystem. The system comprises a demand forecasting module, a boundary analysis module, a constraint processing module, an optimizing module, a performance evaluation module, a knowledge processing module, a data storage module and the process interface module which are interconnected with a man-machine interface module. Through energy demand forecasting and related optimized calculation on the load system, the system finishes optimization and dispatch of energy yield of energy conversion equipment, can realize dynamic balance between the cold, heat and electricity supply and the demand, and fulfills the purposes of improving the utilization efficiency of energy, saving energy and reducing emission.

The invention discloses a smart energy network system and a control method thereof. The system comprises one or more regional energy network units. The regional energy network unit comprises an energy generation subsystem, an energy storage subsystem, an energy application subsystem and an energy regeneration subsystem, and further comprises a subsystem energy efficiency controller and an energy efficiency matching station, wherein the subsystem energy efficiency controller is connected with the energy generation subsystem, the energy storage subsystem, the energy application subsystem and the energy regeneration subsystem respectively; and the energy efficiency matching station is connected with the energy generation subsystem, the energy storage subsystem, the energy application subsystem and the energy regeneration subsystem by an energy network and an information network, and is used for acquiring the energy information of the regional energy network units by the information network, and scheduling the energy production, transfer, storage and conversion in the regional energy network units according to the energy information by the subsystem energy efficiency controller.

The continuously perfused heart conservator includes container for heart and conserving liquid, membrane lung, perfusing pump, perfusing pipe, liquid intake pipe, liquid outlet pipe and sampling pipe. The liquid intake pipe has one end connected to the container and the other end to the membrane lung; the liquid outlet pipe has one end connected to the membrane and the other end connected to theperfusing pipe inside the container; the sampling pipe has one end connected to the membrane and the other end connected to the container; and the perfusing pump is installed in the liquid intake pipeline. Inside the conservator, one closed circulating system may be formed for extracorporeal heart to absorb oxygen and nutritive matter from the conserving liquid and to maintain stable myocardial inside environment. The present invention can raise the maintaining effect of extracorporeal heart.

The invention discloses a low-fish-meal compound feed for micropterus salmoides. The low-fish-meal compound feed comprises the following components in parts by weight of 25-40 parts of fish meal, 5-15parts of plasma protein powder, 5-15 parts of chicken meat powder, 10-25 parts of fermented soybean meal, 3-10 parts of peanut cakes, 4-10 parts of corn protein powder, 6-15 parts of high gluten flour, 2-6 parts of krill powder, 1-4 parts of cuttlefish cream, 1-6 parts of fish oil, 1-5 parts of soybean oil, 1-5 parts of soybean phospholipid, 0.1-0.5 part of choline chloride, 0.1-0.8 part of calcium dihydrogen phosphate, 0.5-1.5 parts of a vitamin premix, 0.5-1.5 parts of a mineral premix, 1-5 parts of inulin, 0.05-0.3 part of methionine, 0-0.5 part of bile acid and 0-0.4 part of taurine. Thelow-fish-meal compound feed for micropterus salmoides conforms to the nutrient requirement regularity of the micropterus salmoides, and has the advantages of being good in palatability and high in digestibility, increasing the survival rate, reducing the feed coefficient, improving the immunocompetence of the micropterus salmoides, and promoting healthy and quick growth of the micropterus salmoides.

The invention discloses a nondestructive testing device for hyperspectral transmission imaging of sphere-like fruits and relates to the technical field of nondestructive testing of agricultural product quality. The device is characterized in that a motorized translation stage (40) is arranged at the bottom in a box body (20), a sample chamber (50) is formed in the upper part of the motorized translation stage (40), and a hyperspectral imaging instrument (30) is arranged at the top in the box body (20); the motorized translation stage (40) and the hyperspectral imaging instrument (30) are connected respectively with a computer (10) outside the box body (20); a fruit sample (00) is arranged in the sample chamber (50) and aligns to the hyperspectral imaging instrument (30). The device is reasonable in design and convenient to adjust, has comprehensive functions and is applicable to nondestructive detection and experimental research of the sphere-like fruits such as apples, persimmons, pears, peaches, oranges, watermelons and the like.

The invention relates to a micro-grid energy optimization management method. As a micro-grid energy flow supply-demand error mathematical model is taken as the basis, in the method, controllable power supply of a micro turbine, the charging-discharging capacity and the charging-discharging time of stored energy, dispatching of using time and used electric capacity of users and the like are taken as manipulated variables and the time-sharing and layering-based hierarchical prediction control optimization algorithm is adopted for optimizing the working statuses of all energy modules in consideration of constraint conditions such as energy conservation in the practical micro-grid operation, and the electric restriction of physical equipment, so that the bi-directional disturbance caused by new energy and user loads can be improved, the requirements of the user loads on the electric energy can be met, and the reliability, the safety and the economical efficiency for micro-grid operation can be ensured; the method is suitable for energy optimization management in a practical power grid.

The invention relates to a lamb milk replacer belonging to the field of the animal nutrition and forage science of the animal husbandry. In the invention, vegetable protein, such as soybean and the like, whey powder, milk sugar, water-soluble fat, an enzyme preparation, mineral substances, vitamins and the like, are taken as raw materials to prepare the lamb milk replacer according to a scientific formula, and the lamb milk replacer is used for replacing goat milk and milk to feed lambs which are 0-90 days old. The milk replacer contains various nutrient substances required by the growth and development of the lambs and reaches the optimal proportion. The lambs can use the lamb milk replacer after being born. The survival rate of the lambs under the condition of multiple lambs in a birth can be improved by using the milk replacer, and meanwhile, the digestion and the adsorption of the lambs to the nutrient substances can be promoted, thereby promoting the growth and development of the lamps. The application of the invention can bring visible economic and ecological benefits to the development of animal husbandry and mutton sheep breeding industry.

The invention discloses a decision method for rolling optimization of wind and light storage cooperative scheduling. The decision method comprises the following implementation steps of: acquiring day-ahead prediction values of load, wind power of wind power farms and output power of photovoltaic power stations and data such as charging demand of each electric automobile recharging station; arranging a day-ahead plan of a next-day charging plan of each electric automobile recharging station, wherein the plan can meet energy demands of electric automobiles of each electric automobile recharging station and reduce the peak valley difference rate of equivalent load curves, so that the peak pitching pressure of the conventional machine sets is reduced, and the energy access level of renewable energy is improved; and continuously modifying the rolling of the charging plan of each electric automobile recharging station in rest time period of a current day in real time through the updated predication data acquired every hour such as the load, the wind power of the wind power farms and the output power of the photovoltaic power stations of the rest time period of the current day in the operation of the current day, so that the problem that an actual equivalent load curve smoothing effect of the current day is weakened by the charging plan of each electric automobile recharging station due to prediction errors is solved as possible.

The present invention discloses a laying duck feed for improving the color and quality of eggshell. The feed is made from corn, wheat middling, soybean meal, stone powder and compound premix feed. The compound premix feed includes 100-150 parts of prickly ash seeds, 100-160 parts of calcium hydrogen phosphate, 250-350 parts of stone powder, 40-70 parts of table salt, 20-40 parts of baking soda, 12-20 parts of choline, 30-40 parts of compound trace elements, 8-10 parts of compound vitamins, 1-3 parts of vitamin C, 25-30 parts of methionine, 200-300 parts of fishmeal, 1-3 parts of lactic acid bacteria, 20-30 parts of Chinese herbal medicines, 0.2-0.4 part of HyD, 2-5 parts of phytase, 2-4 parts of complex enzyme preparations and 0-100 parts of carriers. Using the feed to feed laying ducks can significantly enhance immunity of the laying ducks, can make the eggshell good in quality, low in breakage rate and bright in color, can make the laying ducks long in egg laying peak, and can significantly improve the breeding efficiency.

The invention discloses a system for comprehensive utilization of the high-temperature furnace gas in a hermetic calcium carbide furnace. Two inlets of the hermetic calcium carbide furnace are respectively connected with a dual-drum limekiln for supplying calcium oxide and a dryer for supplying coke. One outlet of the calcium carbide furnace is connected with a grinding machine used for grinding the calcium carbide; the inlet and the outlet of a mechanical air cooling device are respectively connected with another outlet of the calcium carbide furnace and an inlet of a high-temperature furnace gas purifying device; two outlets of the high-temperature furnace gas purifying device are respectively connected with an inlet of the dual-drum limekiln and an ash content ball press; and the dual-drum limekiln is connected with an inlet of the dryer. The high-temperature furnace gas purifying device in the system takes a foaming aluminum silicate fiber material as a filtration medium which resists high temperature and corrosion and has small resistance and high separative efficiency. The whole system has good energy-saving and environment-friendly characteristics. On the one hand, the recycle of the high-temperature CO furnace gas in the hermetic calcium carbide furnace and the kiln gas of CO2 in the limekiln can satisfy the energy need of the system; on the other hand, the coke consumption and the CO2 emission are reduced.

A thermion-photoelectric-thermoelectricity combined type isotope cell comprises a radioactive source and an energy transition structure; two ends of the energy transition structure are respectively assembled with a cell anode and a cell cathode; the energy transition structure comprises an emission pole plate, a filling medium and a transparent charge collection plate arranged in sequence from inside-out and compactly stacked; the emission pole plate is arranged on the radioactive source side surface; the energy transition structure also comprises a first transparent insulation substrate, a photoelectric assembly, a second transparent insulation substrate and a thermoelectricity assembly arranged in sequence from inside-out and compactly stacked, wherein the first transparent insulation substrate is arranged on the transparent charge collection plate side surface; two ends of the photoelectric assembly are provided with a first electricity output electrode; two ends of the thermoelectricity assembly are provided with a second electricity output electrode; the energy transition structure side surface and cell anode and cathode on two ends are wrapped by a buffer pad; an inner package and an outer package heat radiation layers are arranged on the outer surface of the buffer pad. The thermion-photoelectric-thermoelectricity combined type isotope cell is high in energy conversion efficiency, large in output power, strong in environment applicability, good in work stability, and long in service life.

The invention discloses a feed suitable for mixed raising mode of grass craps, silver carps and bighead carps on a large standard, which comprises the following components in percentage by weight: 3-8% of fish meal, 10-15% of bean meal, 10-15% of cotton meal, 17-22% of vegetable meal, 15-22% of rice bran, 15-20% of bran, 3-8% of rape seed, 3-8% of soybean, 0.3-0.8% of salt, 1-2% of calcium hydrophosphate, 1-2% of bentonite, and 0.8-1.5% of premix compound. In addition, the invention also provides a production method for the feed suitable for the mixed raising mode of grass craps, silver carpsand bighead carps on a large standard. Compared with the prior art, the feed suitable for the mixed raising mode of grass craps, silver carps and bighead carps on a large standard and the production method, which are provided by the invention, have the advantages that the adopted raw materials are low in cost, are easy to identify and have small possibility of counterfeit, thus the stability of the quality of the feed can be guaranteed to the maximum degree, grass carps on a large standard can be cultured, and the output of filter-feeding fishes is increased so as to improve the comprehensivebenefits of pond breeding.

The invention discloses selenium-rich germinated brown rice snowflake rice flakes and a processing method of the selenium-rich germinated brown rice snowflake rice flakes. The selenium-rich germinated brown rice snowflake rice flakes comprise the following raw materials in percentage by weight: 15-24% of selenium-rich germinated brown rice, 23-29% of milled rice with embryo, 13-22% of buckwheat, 16-25% of maltodextrin, 3-13% of pumpkin powder, 4-9% of semen sesami nigrum and 3-7% of xylitol. The processing method comprises the following steps in sequence: grinding the raw materials, adding water for stirring, grinding by gum, saccharifying and carrying out pregelatinization, drying the raw materials by using a steam rotary drum, crushing and separating, drying the raw materials in the air to obtain the selenium-rich germinated brown rice snowflake rice flakes of 5-7 meshes. The selenium-rich germinated brown rice snowflake rice flakes are fresh in taste, rich in nutrition, balanced in energy, instant to brew and drink, and convenient to eat.

The invention discloses a solar energy utilization system for buildings, comprising a solar energy receiving system, a photovoltaic conversion system, a living hot water system and a heat energy refrigeration and heating system, wherein the solar energy receiving system converts the solar energy of the building into electric energy and heat energy; the photovoltaic conversion system inverts direct current into alternating current used in the building; the living hot water system converts the heat energy into living hot water which can be continuously used in the building; and the heat energy refrigeration and heating system takes the heat energy as a power source for refrigeration and heating in the building. The solar energy utilization system for buildings can utilize the energy on the building caused by sunlight illumination to the maximum degree, respectively extracts the solar energy, meets the requirement of the building on the energy by two modes of combining photovoltaic power generation and heat generation, and meets power supply, living hot water and refrigeration and heating function in the building. The photovoltaic power generation can be consumed through the electric load of the building and cannot be exhausted, and also can be conveyed to a power grid to meet other requirements, so the optical energy conversion efficiency is greatly improved.

The invention discloses food with functions of enhancing immunity, supplementing calcium and anti-aging, and belongs to the field of food processing technology. The food has the functions of enhancing immunity, supplementing calcium and anti-aging. The food is prepared by the following raw materials by weight: 0.5-1.5 parts of bone powder, 1.5-2.5 parts of collagen, 0.3-0.8 part of ginseng powder, 0.0000002-0.0000003 part of vitamin D, 3-4 parts of hazelnut powder, 0.5-1.5 parts of sea-buckthorn extract, 0.5-1.5 parts of silkworm pupa powder and 5-7 parts of lotus powder. The food is rich in nutrients and comprehensive in functions, can be absorbed and utilized by human body, and has the functions of supplementing calcium, enhancing immunity of human body, delaying skin aging, supplementing protein and building the human body.

The invention discloses a manufacturing technology of an R4 grade mooring cable used on a deep sea drilling platform. The manufacturing technology comprises steps as follows: blanking, heating, ring making, flash welding, burr removing, ledge pressing, quenching and tempering, tension testing, surface polishing, non-destructive flaw testing, packing, dip coating and shipping, wherein during heating, the fine grain steel granularity is required to be maintained to be higher than three grades; the temperature difference is controlled to be plus or minus 2 DEG C; during ring making, welded junctions are spaced for 1-3 mm, the angle is 3-4 degrees, and the alignment tolerance is 0.3 mm; the burr removing precision is smaller than 3%; the difference of the reshaping size of a pressed ledge is controlled to be plus or minus 0.2 mm; a ledge is strengthened and not symmetric; and the ledge length difference is plus or minus 0.2 mm. The marine mooring cable manufactured with the manufacturing technology method has the effects of high strength and toughness, corrosion resistance and fatigue resistance.

The invention discloses a solar energy and air source heat pump coupled hot water system. The system has three operation modes; when solar sunlight is sufficient, solar energy is adopted to directly supply heat; and when the solar energy is insufficient, an air source heat pump system is used for supplying hot water. In addition, a heat storage device is provided for storing the heat of the solar energy in a heat pump heating mode, and is used as a low-temperature heat source in regeneration of a solid absorption dehumidifying agent in a regeneration mode; and at this time, the solar energy continuously feeds the heat to the heat storage device to meet the heat requirements in regeneration of adsorbent so as to realize frostless operation of a heat pump and recycling of dehumidification adsorbent. On the basis of fully using the solar energy to supply the heat, a heat pump heating system is additionally provided to realize continuous hot water supply; and the solar heat stored in the heat storage device is used as the low-temperature heat source in regeneration of the dehumidification adsorbent to realize frostless operation of the air source heat pump.

The invention relates to a capacity allocation method applied to a rail transit vehicle-borne hybrid energy storage system. The method comprises a step of defining a weight weight factor (alpha) and a charging energy weight factor (Q), a step of substituting the traction condition information of a train, alpha, Q and energy storage component parameters of the vehicle-borne hybrid energy storage system as input into each boundary condition of an energy demand, a charging power demand and a discharge power demand of the vehicle-borne hybrid energy storage system, outputting a boundary value of a total weight of the vehicle-borne hybrid energy storage system separately, and recording a maximum value in three boundary values as the total weight of the vehicle-borne hybrid energy storage system needing to be configured actually in this time of alpha and Q allocation, and a step of obtaining an optimal capacity allocation scheme through the optimized calculation and adjustment of alpha and Q. Accoding to the method, while the train traction is satisfied, with the weight of the vehicle-borne hybrid energy storage system as an optimization target, an optimized capacity allocation scheme with the coupling of different types of energy storage components are made through optimized calculation, and a new way of thinking is provided for the capacity allocation of the vehicle-borne hybrid energy storage system.

The invention relates to a sillago sihama forsk floating extruded pellet compound feed, belonging to the technical field of fish feeds. The floating extruded pellet feed provided by the invention is prepared from the following components: a crude protein component, a carbohydrate component, a crude fat component, calcium dihydrogen phoshate, multivitamin, mineral, an alga component, a liver-protecting component and Chinese herbal medicine extract components. The sillago sihama forsk floating extruded pellet compound feed is developed on the basis of intensive study on the feeding characteristics, ecological habits and nutrition requirements of sillago sihama forsk under a natural environment condition, and can meet the feeding requirements of the sillago sihama forsk; the possibility of liver and gall diseases can be reduced; the organism immunity is improved; and the survival rate and the weight gain rate of the sillago sihama forsk are significantly improved.

The invention relates to a clinical nutrition formula special for diseases of respiratory system. The clinical nutrition formula comprises protein, fat, carbohydrate, dietary fiber, macro-element, microelement, lipid-soluble vitamin, water soluble vitamin, diet essence, homologous medicinal and diet components, natural plant compound and new resource food. The invention also relates to a preparation method for the clinical nutrition formula. The method comprises the following steps: preparing all the components into powder in advance; performing alcohol extracting, water extracting, concentrating and spray-drying on the homologous medicinal and diet components, thereby acquiring powder; preparing the vitamins and fat into powder in the manner of microencapsulation treatment; or adopting a wet process for performing emulsifying, homogenizing and spray-drying on all the components, thereby acquiring the powder. Through the screening and matching of the components, the nutrition formula provided by the invention can supply comprehensive and sufficient nutrition support to the patient suffering from the diseases of respiratory system, so that the body immunity can be promoted, a certain effect for improving the nutrition state, respiratory function and life quality of the patient can be achieved and a better condition is established for treating the diseases.

The invention relates to a greenhouse heat source heat pump valley electricity heat storage block energy station. The greenhouse heat source heat pump valley electricity heat storage block energy station mainly solves the technical problems of large building heat supply demand and insufficient pump heat supply in an ultra-low temperature environment by utilizing valley electricity heat storage inthe cold weather in the prior art. As a renewable clean energy block chain energy supply mode, the greenhouse heat source heat pump valley electricity heat storage block energy station is balance adjustment of the influence of combined heat and power generation greenhouse gas and greenhouse waste heat on the environment, and a system can realize the triple supply of warm and cold air conditioninghot water through switching. The heat storage / cold storage function of valley electricity is taken into account, and the economic and reasonable large-scale application of energy block chain technology enables decentralized renewable energy supply to be possible. A heat source of greenhouse can be absorbed and promoted, and meanwhile low-temperature cold airflow is delivered to the atmosphere to drive off haze, so that the economic and social benefits of artificial cold sources to control haze are achieved.

The invention discloses a scheduling optimization method of a multi-energy coupling comprehensive energy system. The scheduling optimization method comprises the following steps: S1, establishing models of renewable energy, energy coupling equipment and energy storage equipment; s2, establishing a day-ahead scheduling model; s3, substituting the prediction results of the electricity, cold, heat and gas loads in the future 24 hours into the model in the step S2, and performing solving the prediction results in a Cplex optimizer; s4, establishing an intra-day rolling optimization scheduling model; and S5, substituting the real-time electricity, cold, heat and gas loads into the model in the step S4, and performing solving in a Cplex optimizer. According to the scheduling optimization method,the accuracy of a result is improved by utilizing day-ahead intra-day multi-time-scale scheduling, so that the operation cost of the system is reduced, and the stable and economic operation of the system is ensured.

The invention relates to a method for producing a high-macroelement liquid organic special fertilizer. The method comprises the following steps: selecting raw materials, pretreating the raw materials, performing anaerobic fermentation, performing slag-liquid separation, performing oxygen exposure filtration, mixing and blending and performing refined filtration filling. The content of the macroelement is improved to a high level, and the topdressing problem of organic cultivation is solved; and moreover, the production efficiency is high, the cost is low, and the problems that waste of biogas slurry and sewage is severe even the environment is polluted are solved.

The invention discloses an auxiliary power system for electricity generation of a hybrid vehicle, comprising an engine, a rotating speed sensor, a generator, a rectifier, a power battery, a generating control unit (GCU), an engine ECU, a relay, a starter, a water circulating pump, a water circulating fan, a safety relay, an oil pump relay and an oil pump, wherein the engine is mechanically connected with the generator which supplies power for the power battery; the engine and the generator are commonly controlled by the engine ECU and the generating control unit (GCU); and the generating control unit comprises an electronic accelerator for waking the engine ECU, starting the engine to enter the idle and controlling the ECU, a circular water pump of the generator, a cooling fan and other control parts. The system can meet the energy demand of the finished vehicle, supplement energy for the power battery, increase the driving range of the vehicle, prolong the service life of a power battery pack and achieve the aims of reducing energy consumption, discharging the finished vehicle, improving the dynamic response of the finished vehicle, weakening the noise vibration and the like.

The invention discloses an integrated energy supply system for an agricultural greenhouse and a power supply method. The temperature of the greenhouse is automatically adjusted, heat required for maintaining the temperature of the greenhouse is provided, or the temperature of the greenhouse is reduced. According to the integrated energy supply system and the power supply method, a solar heat collection and wind power stirring heating combination effect is used for providing heat to a biogas generator, and the temperature of high-efficiency fermentation of a biogas raw material is maintained; and chemical energy released by biogas combustion is used for driving an absorption type heat pump to realize heating and cooling of the greenhouse, the utilization rate of renewable clean energy and the greenhouse heating efficiency are improved, a comprehensive energy supply operation strategy is proposed, the aim of adjusting the temperature of the greenhouse in different seasons and different weather conditions is achieved, and the needs for agricultural greenhouse energy supply are met.

The invention belongs to the technical field of production of military field battle foods and particularly relates to a production process of a self-heating convenient dish. The production process comprises the following steps: cleaning raw material vegetables, sorting, cutting, carrying out pickling, blanching / deep frying and bagging, adding soup and seasonings, and carrying out sealing, high-temperature sterilization, low-temperature pre-storage and radiation sterilization, wherein the low-temperature pre-storage step is to store a mature dish at (-5)-0 DEG C, and the absorption dose of the food in a radiation sterilization step is 4-10 Gray. The dish produced by virtue of the production process has good preservation degrees on colors, fragrance and flavors and is nutritional and sanitary.

The invention discloses a fermented feed raw material preparation as well as a preparation method and application thereof. The preparation is made from the following raw materials through beneficial microbial fermentation: 205-225 parts of soybean meal, 185-215 parts of cottonseed meal, 185-195 parts of rapeseed meal, 175-205 parts of bran, 185-210 parts of cassava residues and 5-10 parts of cane sugar honey. The invention aims to provide the fermented feed raw material preparation which is balanced in nutrition, low in cost, and capable of enhancing the immunity of bred animals, increasing the survival rate of the bred animals and reducing environmental pollution.

The invention relates to a hybrid display assembly including a solar cell. The display assembly (1) for a portable object includes a first, at least partially transparent, emissive display device (2) located on the side of an observer, a second reflective display device (6) and a solar cell (10) being arranged, in that order, underneath the first emissive display device (2). The second reflective display device (6) is capable of switching between a transparent state, in which the device does not display any information, and a reflective state, when activated.