377 results about "Oxygen deficit" patented technology

The present invention relates generally to systems and methods for increasing oxygen availability to implantable devices. The preferred embodiments provide a membrane system configured to provide protection of the device from the biological environment and / or a catalyst for enabling an enzymatic reaction, wherein the membrane system includes a polymer formed from a high oxygen soluble material. The high oxygen soluble polymer material is disposed adjacent to an oxygen-utilizing source on the implantable device so as to dynamically retain high oxygen availability to the oxygen-utilizing source during oxygen deficits. Membrane systems of the preferred embodiments are useful for implantable devices with oxygen-utilizing sources and / or that function in low oxygen environments, such as enzyme-based electrochemical sensors and cell transplantation devices.

The present invention relates generally to systems and methods for increasing oxygen availability to implantable devices. The preferred embodiments provide a membrane system configured to provide protection of the device from the biological environment and / or a catalyst for enabling an enzymatic reaction, wherein the membrane system includes a polymer formed from a high oxygen soluble material. The high oxygen soluble polymer material is disposed adjacent to an oxygen-utilizing source on the implantable device so as to dynamically retain high oxygen availability to the oxygen-utilizing source during oxygen deficits. Membrane systems of the preferred embodiments are useful for implantable devices with oxygen-utilizing sources and / or that function in low oxygen environments, such as enzyme-based electrochemical sensors and cell transplantation devices.

The invention relates to a preliminary dexidation-anaerobism-oxygen deficit-multistage aerobic / anaerobic biological N and P removing technology, including the steps: a) deoxygenation denitrification is carried out on returned sludge and part of sewage; b) anaerobic phosphorus releasing is carried out on the mixed liquid and part of sewage treated by the step a; c) denitrification is carried out on the mixed liquid and part of sewage treated by the step b and returned nitrification liquid; d) synchronous nitrification denitrification and decarbonising phosphorous absorption is carried out on the mixed liquid treated by the step c; e) nitrification liquid treated by the step d is returned to the step c; f) nitrification liquid treated by the step d is precipitated, part of sludge is returned to the step a, excess sludge is discharged, clean water is discharge or recycled after reaching standards. The device comprises a preliminary dexidation tank, an anearobism tank, an anaerobic tank, a multistage aerobic / anaerobic tank and a secondary sedimentation tank which are sequentially communicated; wherein the multistage aerobic / anaerobic tank is internally provided with a suspension chain aeration system, an inflow water distributing pipeline is connected with the preliminary dexidation tank, the anaerobism tank and the anaerobic tank, and sludge reflux quantity and nitrification liquid reflux quantity can all be regulated by a refluxing device.

An Al2O3 film for covering a ferroelectric capacitor is formed by a sputtering process. The thickness of the Al2O3 film is preferably optimized according to amount of remanent polarization and fatigue tolerance required for the ferroelectric capacitor, for example, 10 nm to 100 nm. Next, oxygen is supplied to a PZT film via the Al203 film by executing a heat treatment in an oxygen atmosphere. As a result, an oxygen deficit in the PZT film is made up for. At this time, evaporation of Pb in the PZT film is suppressed because of the Al2O3 film, and deterioration of the fatigue tolerance responsive to decrease of Pb amount is suppressed. Subsequently, another Al2O3 film is formed as a second protective film by the sputtering process for opposing the deterioration factor in later process. The thickness of the Al2O3 film is preferably the thickness which sufficiently protects the ferroelectric capacitor from the deterioration factor in later wiring process.

The embodiment of invention provides a smart integrated MBR sewage purifying device. The device comprises an oxygen deficit pool, an aerobic pool, a membrane pool, a clear water pool and an equipmentroom. The oxygen deficit pool is communicated with the bottom of the aerobic pool, the aerobic pool is communicated with the top of the membrane pool, the clear water pool and the membrane pool are not communicated in the same pool, and the equipment room is next to the clear water pool and comprises a phosphorous removal system, a back flush system, a sterilizing system and an electric control cabinet; the oxygen deficit pool primarily filters sewage, a denitrification reaction occurs, the sewage has the denitrification reaction through the aerobic pool to generate nitration liquid, the membrane pool performs deep-layer filtering through an MBR membrane device and is connected with the phosphorous removal system to remote phosphorous in the sewage, and the clear water pool is connected with the sterilizing system to sterilize produced water by the membrane pool, so that clear water is obtained. By the adoption of the modularized design, the production period is controllable, quality is good, the structure is compact, the size is small, transportation and installation are simple, full-automatic operation can be realized, remote monitoring can be realized, and the demand for treating the sewage in villages and small towns can be met.

The invention relates to a solar intelligent ventilation system for a car. The solar intelligent ventilation system comprises an air supply system, a compartment air exhaust system, a power supply module, a parameter measurement module, a parameter acquisition and equipment control MCU, a human-car conversation module, a car-mounted electric generator and a car window motor, wherein the air supply system consists of a car-mounted air conditioner air supply fan, an air supply valve and an air supply outlet; the compartment air exhaust system consists of an air suction opening of an exhaust fan and the exhaust fan; the power supply module consists of solar power generation films, a battery and a power supply switching device; the parameter measurement module consists of a temperature sensor, a CO2 concentration sensor and a CO concentration sensor, a car running status and parameter output port and a multi-channel analog-to-digital converter; and the human-car conversation module consists of a callable intelligent PAD (built-in GPS) and a car-mounted audio system. The solar intelligent ventilation system disclosed by the invention is mainly used in the state of car parking, so that ventilation and air exchange in the compartment can be kept, the temperature in the car can be reduced, death of children or pets, that are kept in the car inadvertently, due to high temperature or oxygen deficit can be prevented effectively, the aging of car interiors can be prevented effectively, and toxic volatile matters released by the interiors can be discharged in time.

Provided are a layered complex oxide that can lower PM oxidation temperature and increase oxidation rate, and a nitrogen oxides reduction catalyst, a three-way catalyst, a DPF and an oxidation catalyst, each of which includes the layered complex oxide. The layered complex oxide has a layered perovskite structure and has a composition represented by the formula: (Ln3-xAx)1-αMn2O7-δ (wherein Ln is La and / or Nd, A is Sr and / or Ca, α is degree of A-site deficiency, δ is the oxygen deficit amount, and X, δ and α satisfy 0<X<3, 0<α<1 and δ<1.4), which are included in the catalysts and DPF.

The invention discloses a totally-closed all-transparent intellectualized organic prawn ecological breeding device and belongs to a product and a technical system for prawn aquiculture. The totally-closed all-transparent intellectualized organic prawn ecological breeding device solves various prawn farming industry faced difficulties and problems such as water quality oxygen deficit, bottom material oxygen deficit deterioration, bacterial and viral diseases, stress reaction, antibiotic residue, drug residue, difficult biophysical chemistry environmental index regulation, high death rate and low survival rate, achieves transition from a traditional prawn pond culture mode to a totally-closed all-transparent full-automatic factory-like intellectualized multilayer grading running water ecological breeding mode with low costs, timely and accurately adjusts water quality biophysical chemistry environmental indexes such as the water quality illumination, the light quality, the temperature, the salinity, the dissolved oxygen, the nutritive salt, the carbon dioxide, a PH (Potential of Hydrogen) value, the transparency, the ammonia nitrogen, the nitrite, the sulfuretted hydrogen, organic matters, bacterial phases, algal phases, insect phases, food organism varieties and the density and produces various aquatic products satisfying market requirements.

The invention discloses a continuous aerobic composting device and a disposal method for dead livestock and poultry on a livestock and poultry farm and belongs to the field of hazardous waste harmless utilization and recycling. The continuous aerobic composting device comprises a crushing device, a fermentation tank body and a main shaft driving device, wherein a feed opening is formed in the top of the fermentation tank body, a discharge opening is formed in the bottom of the fermentation tank body, and a bushing with leak holes is arranged at the inner lower part of the fermentation tank body; a main shaft is arranged in the fermentation tank body, and stirring blades are arranged on the main shaft; the lower end of the main shaft extends out of the bottom of the fermentation tank body and then is connected with the main shaft driving device; a feeding device is arranged on the outer side of the fermentation tank body; the crushing device is connected with the feed opening of the fermentation tank body by the feeding device. The continuous aerobic composting device can realize continuous automatic aerobic composting of dead livestock and poultry, is low in energy consumption and free of secondary pollution, realizes recycling of harmful wastes, is uniform in air distribution, avoids local oxygen deficit, and has the advantages of being low in cost, accurate in parameter control, sufficient in fermentation, high in degree of automation and the like.

The invention provides a method for preparing a bamboo-based activated carbon and a preparation device thereof. The method comprises the following steps: A, drying, namely crushing bamboo materials at 250-350 DEG G and drying the crushed bamboo materials by drying air; B charring, namely charring the dry bamboo materials under the oxygen deficit condition by using 550-700 DEG C pyrolysis gas as thermal supports; C activating, namely spraying water steam to the charred bamboo materials, activating the bamboo carbon under the oxygen deficit condition at the activating temperature of 900-1000 DEG C, and cooling the activated bamboo carbon to obtain the bamboo-based activated carbon. The reaction is uniform and complete, the water steam in the activating process is completely contacted with the charred material, the generated activated carbon does not easily head and scale in the furnace, and the stability of product quality and the rate of carbon are improved. Moreover, the charring dry-distillation residual heat is completely utilized, the energy consumption is reduced, the charring dry-distillation by-products are recovered, the fume emission is reduced, the pollution to environment is reduced, and the comprehensive utilization rate of the bamboo materials is improved.

The invention discloses a biomass whirlwind hot blast stove. A furnace is composed of a main combustion chamber and an auxiliary combustion chamber which are separated, wherein the main combustion chamber is used for a primary combustion and is provided with a cylinderical inner cavity; the auxiliary combustion chamber is used for a secondary combustion; the main combustion chamber and the auxiliary combustion chamber are communicated mutually at the upper part; and the side wall of the main combustion chamber is provided with a primary air hole which is communicated with an air pipe and is arranged tangentially. The primary whirlwind ensures the favorable mixing of smoke and primary air, prolongs the detention time of unburned carbon grannules in the furnace, and mainly plays a role of gasification; the auxiliary combustion chamber ensures the complete combustion of the unburned carbon granules and combustible gas in the furnace, plays a role of oxidation, and black smoke is generated by the uncomplete combustion caused by high temperature and oxygen deficit is reduced; the combustion efficiency of the hot blast stove is improved obviously, compared with the normal hot blast stove, the consumption amount of fuel is saved by about 10%, also the frequency of black smoke emission is decreased obviously, and the aim of clean combustion is achieved; and the hot blast stove can be suitable for the combustion of sawdust and meal, and is even suitable for the combustion of BMF (biomass fuel) fuel.

The invention discloses a sewage treatment method and a sewage treatment system, and belongs to the field of sewage treatment. With adoption of the method, a sewage pre-treatment unit, a secondary biological treatment unit and an advanced treatment unit which are sequentially connected are adopted, the method comprises the following steps: pretreatment: allowing the to-be-treated sewage to enter the sewage pre-treatment unit, and filtering, floating in air or precipitating to remove suspended matters in the sewage; secondary biological treatment: allowing the pre-treated sewage to enter the secondary biological treatment unit, using A2 / O-MBR in a front oxygen deficit tank in the secondary biological treatment unit to remove COD (Chemical Oxygen Demand), ammonia nitrogen, and total nitrogen and phosphorus; and advanced treatment: allowing the effluent secondarily biologically treated to enter the advanced treatment unit, and directly discharging or recycling the effluent after disinfection. The pretreatment, the secondary biological treatment and the advanced treatment are matched, particularly, A2 / O-MBR in the front oxygen deficit tank in the secondary biological treatment effectively removes COD, ammonia nitrogen, and total nitrogen and phosphorus in the sewage, so that the phosphorus is removed while the denitrification effect is guaranteed, and the waste water treatment efficiency is improved.

The invention discloses a grapefruit tea beverage. The grapefruit tea beverage is characterized by being prepared from following raw materials in parts by weight: 25-28 parts of umbilicaria esculenta, 3-5 parts of polygonum multiflorum, 2-3 parts of rhizoma polygonati, 3-5 parts of mints, 1-3 parts of pseudo-ginseng, 2-4 parts of lumbricus, 2-3 parts of baphicacanthus cusia, 15-17 parts of grapefruit peels, 17-19 parts of grapefruit pulp, 19-20 parts of sweet potatoes, 16-18 parts of rice, 14-16 parts of beef livers, 17-20 parts of chives, 16-19 parts of lemons, 16-18 parts of bitter gourds, 4-6 parts of an auxiliary agent and suitable amount of water. The beverage provided by the invention has the effects of nourishing kidney and moistening lung, tonifying spleen and tonifying qi, resisting oxygen deficit, resisting fatigue, resisting aging, enhancing the immunologic function, enhancing the metabolism, lowering the blood glucose and strengthening the heart. The beverage has a relieving effect on drunken people and also has the effects of relaxing the bowels and ventilating on belly-bound people; the beverage is a healthy and green food and has a wide development and application prospect.

The invention relates to a pseudomonas aeruginosa with heterotrophic nitrification-aerobic denitrification and dephosphorization functions under different dissolved oxygen conditions and application of the pseudomonas aeruginosa. The bacterial strain can carry out growth metabolism by using organic carbon as a unique carbon source and ammonia nitrogen as a unique nitrogen source, the ammonia nitrogen can be respectively converted into gas products through the heterotrophic nitrification-aerobic denitrification effect under different dissolved oxygen conditions such as the oxygen deficit condition, the microaerobic condition and the aerobiotic condition, and the goal of denitrification is reached. The bacterial strain can also carry out growth metabolism by using nitrate nitrogen as a unique nitrogen source, the nitrate nitrogen can be converted into gaseous products through the dephosphorization effect under the oxygen deficit, microaerobic and aerobiotic conditions, and the goal of denitrification is reached. Meanwhile, the bacterial strain can also reach the goal of removing phosphate in water through converting inorganic phosphorus into self components under different dissolvedoxygen conditions. Therefore, the bacterial strain can be used for synchronously removing elements such as carbon, nitrogen and phosphorus in the water under different dissolved oxygen conditions, and wide application prospects are realized in the wastewater treatment.

To obtain metal oxide layer having a reactiveness to electromagnetic wave whose wave length is longer than that of ultraviolet rays, for example, visible radiation or the like. A metal oxide layer is a layer of a stable metal oxide, for example. TiO2, ZnO, WO3, SnO2, ZrO2 or the like obtained by melting and adhering metal powder for forming a layer of titanium (Ti), zinc (Zn), wolfram (W), stannum (Sn) and zirconium (Zr) or the like on a surface of a product to be treated comprising of a metal, ceramics or a mixture of them by injecting the metal powder with high speed by dint of using a compressed air and has oxygen deficit tilting structure wherein bonding quantity of oxygen is decreased as goes from the surface to the inside gradually.

The invention discloses an intelligent energy-saving oxygenation device for modern agriculture standardized aquaculture fish pond. The intelligent energy-saving oxygenation device comprises a floating frame and a balancing weight arranged below the floating frame. Oxygenation blades are arranged on the outer side of the floating frame. A track groove is formed in the edge of the outer side of the floating frame. Teeth are arranged on the upper end face of the track groove. A movable frame body is arranged above the floating frame. A driving motor is arranged on the lower end face of the movable frame body. A speed reducer matched with the driving motor is arranged at the output end of the driving motor. The two sides of the speed reducer are each provided with an output shaft. A first driving gear is arranged on the output shaft on one side. The first driving gear is meshed with the teeth. By adopting the oxygenation blades, water flowing can be facilitated in the rotating process, so that the water oxygen capacity is increased, meanwhile the oxygen content inside water is increased in the mode of conveying an oxygenation medicament into the water intermittently, and the phenomenon that fish schools die from oxygen deficit due to water oxygen deficit is avoided.

The invention discloses a large yellow mealworm breeding tank and the application of the large yellow mealworm breeding tank in breeding yellow mealworms and disposing kitchen waste. The bottom of a breeding tank body is in a conical shape, and a discharge port of the breeding tank is formed in the bottommost part at the conical tank bottom. A stirring shaft is arranged in the longitudinal axis inside the tank body and is connected with a plurality of stirring arms, and the included angle smaller than 90 degrees is formed between each upward stirring arm and the stirring shaft. The stirring shaft and the stirring arms are hollow and are communicated, and the stirring shaft and the stirring arms are provided with air holes. A temperature and humidity induction device is arranged inside the tank body and is connected with a regulation cabinet outside the tank body, and the regulation cabinet is connected with a temperature and humidity regulation unit which is communicated with a pressurizing device and the stirring shaft sequentially. The breeding tank is provided with the stirring shaft and the stirring arms, and the stirring shaft and the stirring arms are hollow and provided with the air holes, the gas with different temperature and humidity is injected to the stirring shaft and the stirring arms through the pressurizing device and then is sprayed into the tank body, the temperature, humidity and the oxygen content inside the tank can be regulated, and the occurrence that yellow mealworm larvas die due to oxygen deficit, excess temperature and low humidity is avoided.

The invention discloses a modified-atmosphere preservation method for bitter gourds. The method includes the following steps of raw material pretreatment, bagging, gas-filled packaging, sterilization and storage and transportation. By adopting a modified-atmosphere packaging technology and adjusting gas compositions in a packaging storage environment, growth and metabolism of microorganisms can be effectively restrained; meanwhile, by controlling temperature and improving a pretreatment and packaging process, cold damage, ethylene ripening and decaying of the bitter gourds are avoided. According to the modified-atmosphere packaging technology, the non-poisonous, non-harmful and no-residual effects are achieved, non-harmful treatment is adopted in the whole preservation process, the usage of poisonous chemical agents is avoided, and therefore no harmful influence on the bitter gourds exists. By means of the method, the defects of the prior art are overcome, the original freshness, color and luster and flavor of the bitter gourds can be kept, the shelf life of the bitter gourds can be prolonged, and the easily appearing problems that due to extremely low O2 concentration and extremely high CO2 content, the bitter gourds suffer oxygen deficit, and breathing disorders are caused in the modified-atmosphere preservation process of the bitter gourds can be solved.

A procedure to calculate the Lambda value with a wideband Lambda sensor of an internal combustion engine of a motor vehicle is thereby characterized, in that from the measured pumping electricity and the sensitivities of the wideband Lambda sensor as well as the gas concentration ratios, in the lean operation an oxygen concentration and in the rich operation an oxygen deficit are determined and from these respectively a conclusion is drawn about the Lambda value using the Pischinger Formula.

The invention discloses an in-car air conditioning system and aims to provide the in-car air conditioning system which is high in safety and comprehensive in function. The in-car air conditioning system comprises a controller, a fan, a pipeline, an oxygen sensor, a window and door detector, an alarm device and a human body inductor, wherein the fan, the pipeline, the oxygen sensor, the window and door detector, the alarm device and the human body inductor are respectively and electrically connected with the controller; the pipeline is connected with the interior and the exterior of a car; and the fan is arranged in the pipeline. After the system starts working, whether a person is in the car or not is detected by the human body inductor. If the human body detector detects no person, whether car doors and car windows are closed or not is detected through the door and window detector, and if the car doors or the car windows are not closed, an alarm is given through the alarm device after the time reaches a threshold value. If the human body detector detects that the person is in the car, oxygen concentration in the car is detected through the oxygen sensor. When the oxygen sensor detects that oxygen concentration in the car is lower than the threshold value, the fan is started by the controller to suck the air outside the car into the car to realize an outside loop to supplement the oxygen content in the car, and therefore, oxygen deficit or suffocation accident is avoided occurring.

The invention provides a functional blueberry beverage composition which consists of the following components in percentage by volume: 5-40 percent of blueberry juice, 1-20 percent of a medlar extracting solution, 0.5-5 percent of a fructus schizandrae extracting solution, and the balance of water. The blueberry juice is obtained by squeezing fresh blueberries. According to the blueberry functional beverage composition, by using a simple mixing technology, the effects such as oxygen deficit resistance, fatigue resistance, oxidization resistance, and tumor resistance of the blueberries, medlar and fructus schizandrae are enhanced with one another and are better than the pure sum of the effects of single-flavor components on respective aspects. Therefore, the composition is extremely good in mixing effect; animal experiment show that the obvious effects on resisting oxidization resistance, preventing fatigues, improving the immunity and clearing free radicals are achieved; the formula and the preparation technology are simple; the functional blueberry beverage composition is convenient to use and free of toxic and side effects.

An Al2O3 film for covering a ferroelectric capacitor is formed by a sputtering process. The thickness of the Al2O3 film is preferably optimized according to amount of remanent polarization and fatigue tolerance required for the ferroelectric capacitor, for example, 10 nm to 100 nm. Next, oxygen is supplied to a PZT film via the Al2O3 film by executing a heat treatment in an oxygen atmosphere. As a result, an oxygen deficit in the PZT film is made up for. At this time, evaporation of Pb in the PZT film is suppressed because of the Al2O3 film, and deterioration of the fatigue tolerance responsive to decrease of Pb amount is suppressed. Subsequently, another Al2O3 film is formed as a second protective film by the sputtering process for opposing the deterioration factor in later process. The thickness of the Al2O3 film is preferably the thickness which sufficiently protects the ferroelectric capacitor from the deterioration factor in later wiring process.

The invention discloses a technology for performing high-temperature oxygen deficit treatment on hardwoods for obtaining an artificial functional rosewood. The technology is characterized in that the hardwoods of which textural features are similar to those of rosewoods are used as materials; the appearance color of the hardwoods can be in a color space distribution feature range of color parameters of rosewood type timbers after the hardwoods are subjected to high-temperature oxygen deficit and micropore treatment; meanwhile, the gas-phase adsorption performance of the timbers is improved through the high-temperature oxygen deficit and micropore treatment, so that harmful gases such as formaldehyde, benzene and xylene can be adsorbed, and a function of purifying air can be realized. The functional rosewood simulation technology has the advantages that the hardwoods have vivid appearances, the production cost is low and the efficiency is high, and products do not contain harmful substances.

The invention relates to a long-distance transportation method of live sepia esculenta. The method includes the following steps of selecting parent , temporary rearing before transportation, stopping feeding for 24 hours, and preparing water for transportation; according to the step of temporary rearing before transportation, temperatures of the water in a temporary rearing pool is gradually transited to 16-18 DEG C, and the difference between the salinity of the water in the temporary rearing pool and the salinity of cultivation water is controlled within 2; according to the step of preparing the water for transportation, water for temporary rearing is used as the water for transportation, the temperatures of the water for transportation are reduced to 12-14 DEG C, pure oxygen is fed into the water for transportation, the live sepia esculenta is taken out of the pool, bagged and loaded in a foam box for transportation, the box is sealed and loaded to a vehicle, and temperature transition is performed when the live sepia esculenta arrives at the destination. According to the method, defects that the sepia esculenta is prone to jet ink due to severe rocking of water in the long-distance transportation of the live sepia esculenta and extremely prone to die due to high oxygen consumption rates and oxygen deficit in transportation are overcome, costs for long-distance transportation of the live sepia esculenta are reasonable, the method is easy to master, the survival rate of the long-distance transportation live sepia esculenta is over 95%, and the method has large market promotion values and can produce good economical benefits.

The invention discloses a medlar polysaccharide chewable tablet and a preparation method thereof. The medlar polysaccharide chewable tablet is prepared from a medlar extract, dextrin, menthol and magnesium stearate. The chewable tablet has the advantages that the chewable tablet is sour and sweet in flavor, good in taste, easy to chew, easy to absorb, and free of thrill on gastrointestinal tracts, can achieve the effect of immune adjustment in people taking the chewable tablet, can play the roles of resisting aging, tumors, fatigue, and oxygen deficit, reducing blood sugar and blood pressure, improving the immunity of the organism and the like, and is suitable for all peoples and any sensitive people. The medlar polysaccharide chewable tablet does not contain micromolecule sugar, and is suitable for diabetics.

The invention discloses an intelligent bathroom control system. The intelligent bathroom control system is composed of an intelligent bathroom mirror, a water heater, an air heating type bath heater,a human body induction sensor and a temperature and humidity sensor, wherein the communication mode between the water heater and the intelligent bathroom mirror adopts WIFI connection, the communication mode between the air heating type bath heater and the intelligent bathroom mirror adopts 2.4G wireless communication connection, and the intelligent bathroom mirror is composed of an external common mirror surface and an internal display which is a tablet computer based on an android operating system, so that the effect of being one-mirror multi-control is realized. The intelligent bathroom mirror controls the water outlet water temperature, the air heating type bath heater is controlled to open illuminating equipment through information fed back by the human body induction sensor, and theair heating type bath heater is controlled to adjust air draft equipment and heating equipment through information fed back by the temperature and humidity sensor, so that the occurrence of accidentssuch as oxygen deficit, collision, falling down and the like due to overhigh water mist concentration during bathing is avoided.

The invention discloses a nighttime water quality dissolved oxygen prediction method suitable for an aquaculture pond. The nighttime water quality dissolved oxygen prediction method comprises the steps of 1) establishment of water quality data and meteorological data source channels, 2) collection and processing of water quality data and meteorological data, 3) establishment of a dissolved oxygenprediction model and 4) prediction of nighttime water quality dissolved oxygen. The invention aims to solve the problem that oxygen deficit easily occurs at night in the water body of an aquaculture pond. taking the pond water body dissolved oxygen concentration at night as a prediction target; The device is simple in structure and convenient to use, meets actual breeding production conditions andmanagement requirements, can predict the concentration of dissolved oxygen in other breeding ponds at night on the basis of a small amount of online water quality monitoring instruments and equipmentin combination with online meteorological monitoring data and water quality data obtained by daily pond inspection of managers, and greatly reduces the equipment cost of water quality monitoring andearly warning of the breeding farms.

There is such an issue with a TFT using an oxide semiconductor film that oxygen deficit is generated in a surface region of the oxide semiconductor film after performing plasma etching of a source-drain electrode, and the off-current becomes increased. Disclosed is the TFT which includes: a gate electrode on an insulating substrate as a substrate; a gate insulating film on the gate electrode; an oxide semiconductor film on the gate insulating film; and a source / drain electrode on the oxide semiconductor film. It is the characteristic of the TFT that a surface layer containing at least either fluorine or chlorine exists in a part of the oxide semiconductor film where the source / drain electrode is not superimposed.