369results about How to "Reduce stability" patented technology

The invention discloses a production method of a fine-denier porous POY black yarn. The method comprises the following steps of: drying semi-dull slices, drying black masterbatch, adding the slices and the black masterbatch material into a screw extruder, fusing the added materials in the screw extruder, respectively processing the fused materials in a metering pump and a spinning beam, spinning on a pack, cooling the materials by lateral blowing, applying oil on strands, processing the strands in draw-off godets GR1 and GR2, winding and shaping, and inspecting products. The method is characterized in that the step of drying the black masterbatch comprises the following sub-steps of: based on a continuous drying mode, firstly, adding the black masterbatch into a crystallization and drying tank, introducing heated dry air from the lower part of the crystallization and drying tank, and blowing out the heated dry air from the top of the crystallization and drying tank so as to dry the black masterbatch, wherein the drying time is 2 hours, the dried black masterbatch falls into an intermediate material storage bin for storage under the crystallization and drying tank, and the black masterbatch is further injected by a masterbatch injector under the intermediate material storage bin. The production method of the fine-denier porous POY black yarn has high masterbatch spinnability and better cooling effect, and can improve the oil application uniformity of spinning cakes and the productivity.

The present invention provides a vaporizer comprising a vaporization chamber for a CVD material, a CVD material feed portion supplying the CVD material for the vaporization chamber, a vaporized gas exhaust port and a heating means for heating the vaporization chamber, characterized in that the CVD material feed portion has passageways for the CVD material and for a carrier gas respectively and the passageway for the CVD material has a pressure loss-inducing means for the CVD material. At the same time, the present invention provides an apparatus for vaporizing and supplying that feeds a CVD material to a vaporizer via a liquid flow controller, and after vaporizing the CVD material that supplies the vaporized gas for a semiconductor production apparatus, characterized in having a pressure loss-inducing means for the CVD material between the liquid flow controller and the vaporizer. According to the present invention, even in the case of vaporizing and supplying with a decrease in a feed amount of a carrier gas to be supplied accompanying the CVD material employing a solid CVD material, reducing and stabilizing both the pressure fluctuation in the vaporizer and the flow rate fluctuation in the liquid flow controller and efficiently vaporizing a CVD material at a desirable concentration and flow rate without causing deposit or adhesion of the solid material in the vaporization chamber can be achieved.

The invention discloses a high-temperature resistant polymer viscosity reducer for drilling fluid and a preparation method thereof. The polymer viscosity reducer is a copolymer generated by olefine acid, olefine sulfoacid, olefine acid ester and alkenyl quaternary ammonium through chemical reaction, molecules of the copolymer contain 5 to 60 structural units, and viscosity average molecular weight is 2,500 to 30,000. The polymer viscosity reducer can resist temperature of more than 245 DEG C in the drilling liquid, and effectively disperse a grid structure of the drilling liquid, has good viscosity reduction effect in fresh water, aggravated fresh water and a calcium chloride and sodium chloride composite saline water drilling fluid, and can simultaneously inhibit hydration and swelling of clay and reduce filtration loss.

The invention discloses a high-sheet resistance crystalline silicon cell low-voltage diffusion process. In order to effectively improve productivity of a diffusion tube to reduce diffusion cost of a single sheet and improve performance uniformity of mass-production batteries to improve the entire cost performance of the mass-production batteries, a voltage reduction diffusion process is adopted, and great reform is carried out on the original normal voltage diffusion process. Compared with the normal voltage diffusion process, the total nitrogen flow and the total time can be effectively reduced, longitudinal distribution of the diffusion doping concentration can be well controlled, and uniformity of diffusion sheet resistance inside the sheet and between sheets can be effectively improved. The diffusion process of the invention can be applied to a voltage reduction diffusion furnace, the process is strongly matched with the voltage reduction diffusion furnace, the process is applied to industrialized production, productivity can be greatly improved, and the process can then be applied to the crystalline silicon cell production line in a large scale.

The invention belongs to the technical field of function materials, and specifically relates to a Raman strengthening active microsphere and a preparation method and an application thereof. The Raman strengthening active microsphere provided by the invention has a core-shell structure, the core of the Raman strengthening active microsphere is a melamine resin microsphere, and the shell is uniform and compact silver nanometer granules. The preparation method comprises the steps of firstly preparing uniform melamine-oxymethylene microsphere through fasculation, then utilizing a reducing agent to restore silver nitrate through a normal position chemical reduction method, and uniformly and compactly depositing the generated silver nanometer granules onto the surface of the melamine resin microsphere, so as to prepare the MF / Ag-NPs composite microsphere. The raman strengthening active microsphere utilizes a single microsphere as a raman strengthening base material, and is used for detecting Raman. The single Raman strengthening active base material microsphere provided by the invention has the characteristics of high stability and high Raman strengthening property. The method provided by the invention has the advantages that the operation is simple, the process is controllable, and the prepared composite microsphere can be used for analyzing and detecting organic contaminants such as pesticide residue of a single microsphere in a Raman manner.

Disclosed herein are methods and compositions for identifying and / or treating subjects having or likely to have amyotrophic lateral sclerosis (ALS) or frontotemporal dementia (FTD). Antibodies specific for one or more di-amino acid repeat-containing proteins are also provided herein.

The invention discloses a systematic device and a method for biomass microwave pyrolysis poly-generation by adopting combined washing and baking pretreatment. The systematic device comprises a biomass washing-baking-pyrolysis system and a washing liquor circulatory system. According to the method, firstly, biomass raw materials are washed to remove part of alkali metal and impurities and then pre-dried, then large quantities of hemicellulose components are decomposed through baking pretreatment, the physical microstructure of biomass is improved, and the quality of a biomass microwave pyrolysis product after pretreatment is improved; the obtained biomass has high char calorific value and ash fusion point, low bio-oil water content and acidity, stable chemical composition, high syngas calorific value and great follow-up utilization potential. Energy of volatile matters is recovered and taken as a pre-drying heat source; meanwhile, the washing liquor circulatory system recovers sensible heat of pyrolysis char and moisture and latent heat in exhaust gas of flue gas after drying, the energy efficiency of the system is high, exhaust gas is not discharged in an operation process, operating parameters can be adjusted according to the biomass raw materials, the system operation safety is high, and the cost is low.

The invention provides a method for etching a through hole, and the method comprises the following steps of: coating photoresist on the surfaces of a semiconductor substrate, an etching cease layer and an interlamination dielectric layer which are sequentially overlapped from bottom to top, and placing into a reaction cavity, wherein the semiconductor substrate contains a copper metal layer; etching the photoresist and an interlayer dielectric; and detecting that the interlamination dielectric layer is completely etched through a terminal detection system, regulating bias voltage power to zero, and accessing a mixed gas of a fluorine-containing gas and an auxiliary gas to etch the etching cease layer till the etching cease layer positioned on the surface of the copper metal layer is removed. According to the invention, the mixed gas formed from a large quantity of auxiliary gases and a small quantity of fluorine-containing gases is adopted as an etching gas in the etching process, the fluorine-containing gases play main etching roles, and the auxiliary gases achieve the purposes of removing polymers positioned on an etched side wall and diluting gases and matched with zero-bias power, in such a way, the phenomenon of nonuniform etching in the etching process can be effectively prevented, and therefore the etching velocity and the efficiency of an etching process are increased.

The invention provides a touch assembly with pressure detection. The touch assembly with pressure detection comprises a three-dimensional sensor and a three-dimensional controller, wherein the three-dimensional sensor comprises a plurality of touch electrodes and at least one pressure detection electrode; the three-dimensional controller comprises a driver and a driving pulse processor; the driver supplies a pressure scanning pulse to the at least one pressure detection electrode and supplies a touch scanning pulse to the multiple touch electrodes under the cooperation of the driving pulse processor. The invention further provides a driving method of the touch assembly with pressure detection. The method comprises the following steps: the driver supplies the pressure scanning pulse to the at least one pressure detection electrode under the cooperation of the driving pulse processor; the driver supplies the touch scanning pulse to the multiple touch electrodes. The touch assembly with pressure detection has the advantages of simple hardware design, high integration degree, high anti-noise property, simple driving method and the like.

A sober-up vinegar tea consists of the following raw materials with the parts by weight: 15-25 parts of silk jujube vinegar, 1-3 parts of hawthorn, 3 parts of flower of kudzuvine, 1-3 parts of chrysanthemum extractum, 2-4 parts of wild jujude seed, 1-3 parts of bamboo leaves, 1-3 parts of menthol tincture, 1-3 parts of green tea extractum, 2-4 parts of honey and 57-67 parts of deionized water, wherein, the total acid of the silk jujube vinegar is 6g / 100ml, the total amino nitrogen is 0.25g / 100ml and the non-volatile acid is 2.4g / 100ml. The sober-up vinegar tea takes the silk jujube vinegar as a solvent to extract effective components of natural plants and Chinese medicinal herbs, and ethanol is removed, ingredients and flavor are added, then sterilization is carried out, therefore, the sober-up vinegar tea is obtained. The sober-up vinegar tea integrates the functions of sobering up, soothing the nerves, nourishing the stomach, strengthening the spleen and restoring consciousness into a whole, and the tea accelerates drainage of ethanol and reduces blood alcohol concentration after being drunk as a delicious drink. The sober-up vinegar tea can cause the drunkards to rapidly recover from inebriation, thus avoiding some drunkards from affray, which is beneficial to decreasing traffic accidents, guaranteeing public security and protecting physical health of the mass.

The invention relates to a piece of highly sensitive pH test paper and a preparation method thereof, wherein a developing strip is in the form of a piece of pH body paper, which is dipped in a reagent solution and then dried by hot air at constant temperature; the reagent solution contains an indicator; the formula of the indicator contains bromothymol blue, thymol blue, metanil yellow, m-methyl red, bromocresol green, nitrazine yellow, cresol red, phenolphthalein, para-nitrophenylazosalicylate sodium, titan yellow, fluorescent pigment orange red, 5% 4-nitrobenzenediazo-1-naphthol-3.6-sodium disulfonate solution and 30% dissolved ethanol aqueous solution; and the formula of the indicator further contains an aqueous colour fixing agent, a cotton wooden fibre mildew preventive, a special paper mildew preventive and a buffer neutralizer formed by modulating sodium hydroxide and phosphoric acid. The preparation method comprises the following steps of: adjusting the reagent solution till a pH value is up to 6-7.5, uniformly wetting the pH body paper, and drying through hot air at constant temperature. According to the invention, the reagent solution can be adjusted, so that the pH value is up to 6-7.5; steady and precise high sensitivity of the pH1-14 test paper is effectively increased; and the test paper is convenient and simple to use.

A hypoglycemic Chinese medicine for preventing and treating diabetes and its sequelae is prepared from 9 Chinese-medicinal materials including ganoderma, trichosanthes root, notoginseng, red sage root, etc. chromium nicotinate, VE and oligose. Its preparing process is also disclosed.

The invention relates to a novel soybean milk machine. The novel soybean milk machine comprises a machine head, a pulverizing container, a motor, a pulverizing blade and a flow dividing cover; the motor is arranged at the bottom of the machine head; a motor output shaft stretches downwards into an inner cavity of the pulverizing container to be connected with the pulverizing blade; the pulverizing blade is provided with cutting knives arranged circumferentially; flow dividing plates and flow dividing ports which are arranged circumferentially are arranged on the peripheral side of the flow dividing cover; each flow dividing plate extends outwards from the side of the corresponding flow dividing port in an arch shape; the motor drives the pulverizing blade to rotate at high speed to generate a suction force, the suction force sucks food into the flow dividing cover from the lower position of the flow dividing cover, the pulverizing blade rotating at high speed throws out the food to collide to the inner wall of the flow dividing cover, the food flow is discharged from the flow dividing ports by the flow dividing plates in a limited spiral mode, and full circle is repeated until processing is finished. The flow dividing cover has a function of buffering the food to directly flow and impact the inner wall of the pulverizing container, machine vibration is slowed down, the noise is low, the pulverizing efficiency is high, the pulverizing effect is good, the motor burden is small, the load power of a food processor is changed little, and the effect is more excellent than that of a turbulence bone or plate or square cup.

The invention relates to an anaerobic digestion treatment method for organic garbages. The anaerobic digestion treatment method includes removing impurities such as large plastic bags and large metalware in kitchen garbages, lifting and dumping the kitchen garbages into a mechanical biochemical reaction to be subjected to hydrolytic acidification, discharging leaching residues through a residue outlet after squeezing and dewatering, feeding leaching liquid which is filtered roughly into a liquid groove and delivering the leaching liquid from a liquid outlet through a screw conveyor in the liquid groove, feeding the leaching liquid which is subjected to solid and liquid separation and filtering by a drum grill into an oil separating settling tank, enabling the leaching liquid which is subjected to oil and water separation to flow out of the oil separating settling tank, collecting oil and water mixed liquid by an oil collecting pipe and discharging the oil and water mixed liquid out of the settling tank, and lifting the oil-removed leaching liquid into an anaerobic reactor by a screw pump so as to carry out anaerobic digestion treatment. A part of outflow is used as spraying water, the other part of outflow is delivered by a drain pipe, and biogas generated is led into a gas pipe. The anaerobic digestion treatment method is reasonable in technology, capable of increasing hydrolysis and acidification efficiency of organic components and reducing content of residual organic components and low in treatment cost.

The invention relates to the technical field of data exchange between a mobile terminal and a vehicle-mounted terminal, in particular to a mutual control method for the mobile terminal and the vehicle-mounted terminal. The method comprises a method for controlling the mobile terminal through the vehicle-mounted terminal and a method for controlling the vehicle-mounted terminal through the mobile terminal. The mobile terminal and the vehicle-mounted terminal are connected with each other, the vehicle-mounted terminal is used for acquiring an input signal, the input signal is converted into command information, and the command information is transmitted to the mobile terminal, so that the conversion of a command is performed inside local receiving equipment, and the execution of the command is finished on connecting end equipment; a signal preprocessing way is adopted, so that the probability of the problems of signal compression, unstable transmission and the like caused by direct transmission of the input signal to the connecting end equipment for processing is lowered. On the other hand, the command is processed by using the advantages of processing performance, data, network resources and the like of the connecting end equipment, and abundant command processing results are rapidly transmitted back to source end equipment, so that the processing speed is increased, the reliability and inner-vehicle adaptability are improved, and the function of the source terminal equipment is extended.

A negative-pressure isolating system for large animal is composed of an isolator on a supporting frame and with lighting and UV equipment, a cleaning and air exhausting unit with air inlet and air outlet on said isolator, an operating unit on the front panel of said isolator, an object delivering unit, and a draining-disinfecting unit.

The invention discloses an ink-jet printer and a printing method thereof. The ink-jet printer comprises a printing module, supporting beams, a printing platform, an ink-scraping maintenance device and a control system. The printing module is installed above the supporting beams, a sprayer is installed at the lower end of the printing module, and the printing platform is arranged below one ends of the supporting beams. The ink-scraping maintenance device is arranged below the other ends of the supporting beams, the control system is used for controlling work of the printing module, the ink-scraping maintenance device and the sprayer. The ink-jet printer is characterized in that the ink-scraping maintenance device comprises a lifting device, and the lifting device can make lifting movement on the whole in the vertical direction, namely in the Z-axis direction; by controlling overall lifting of the ink-scraping maintenance device and horizontal movement of the printing module in the direction of the supporting beams, ink-scraping or maintenance operation of the sprayer is completed, the lifting device is skillful in structure design, and lifting smoothness and steadiness are high; and in the ink-scraping maintenance process, by approaching a sensor for automatic detection and controlling the distance between the sprayer and the ink-scraping maintenance device, accuracy can be improved, and quick and convenient ink-scraping maintenance is achieved.

The invention relates to an air inlet / exhaust combined air port, and particularly discloses an energy-saving air inlet / exhaust combined air port. The combined air port comprises an air inlet entrance pipeline, an air inlet pipeline and an air exhaust pipeline, wherein the air inlet pipeline is located in the air exhaust pipeline; a connection groove is arranged at the end part of the entrance endof the air inlet pipeline; the bottom end of the air inlet entrance pipeline is arranged in the connection groove; a rotary blade is fixed on the air inlet entrance pipeline; and the orientation of the rotary blade is opposite to that of the entrance of the air inlet entrance pipeline. Due to the unique design of the air inlet / exhaust combined air port, the air inlet entrance always faces to the coming flow, and the air exhaust waste heat can be utilized to save energy; and moreover, the combined air port also adopts an unpowered air cap to perform air exhaust so that the air exhaust is smoother and energy loss is reduced.

A method for spinning-in a yarn on an open-end spinning machine, wherein the yarn (32) between the pulling-off mechanism (4) and the winding device (9) begins to be stressed at the latest at the beginning of pulling-off of the yarn. The negative pressure sucks the yarn (32) coil in the process of entering the negative pressure tube (10) of the working mechanism. After the normal working yarn winding speed is restored, the coils of the yarn (32) in the negative pressure tube (10) are consumed and the negative pressure on the yarn (32) is stopped. This method can be used for all air spinning machines, and also for such devices, the principle of which is that each On the working mechanism, a yarn suction hole (101) of the negative pressure tube (10) for temporarily storing the spun-out yarn (32) after spinning is arranged. The negative pressure tube (10) is a part of the working mechanism of the air spinning machine and is connected to the negative pressure source (1014) in a controllable manner.

The invention discloses a three-dimensional model searching method based on shape orientation multi-resolution analysis, and the method comprises the following steps: obtaining an orientation sampling plane by adopting a three-dimensional plane patch orientation principle component analysis method; sampling orientation distribution of the three-dimensional shape and generating a sampling function of the orientation distribution; analyzing the sampling function and extracting a multi-resolution low-frequency wavelet coefficient of the sampling function; and calculating feature distance in a self-adaption multi-resolution feature distance calculating method. The method can enhance the precision and speed of searching the three-dimensional model and can be applied to the fields of three-dimensional model multiplex, model identification, robot vision, virtual reality and the like.

The invention relates to a leaching mechanical-biological reactor for treating household garbage. The leaching mechanical-biological reactor comprises a charging hole, a waste gas collecting hole and a liquid inlet box body, wherein a stirring mechanism, a filtering and deslagging mechanism, a grating clearing mechanism and a liquid collecting box are arranged in the box body; the filtering and deslagging mechanism comprises a grating set and a deslagging spiral feeder, wherein the grating set is connected with the box body; a connecting rod and more than three cutter bars are arranged on a blade supporting frame of the grating clearing mechanism; a drive shaft of a power driver arranged on the outer part of the box body extends into the box body and is connected with the blade supporting frame; more than three clearing blades on each cutter bar are arranged in a grating gap corresponding to the grating set and are higher than the end surfaces of grid bars; the liquid collecting box is arranged on the lower part of the box body; and the leaching spiral feeder is arranged on the bottom of the liquid collecting box. The leaching mechanical-biological reactor has a reasonable structure, a small volume, is stable in treatment, and can remove most of inorganic substances which are not easy to biodegrade; furthermore, the operation stability of the device can be improved; and moreover, when the organic substance serous fluid enters an anaerobic reactor, the treatment efficiency of the anaerobic reactor can be ensured.

The invention discloses a capital market public opinion monitoring method based on a distributed web crawler and an NLP. The capital market public opinion monitoring method comprises a distributed crawler module based on a cloud server and a financial text NLP analysis system. Based on a distributed crawler of a cloud server, multi-process and periodically updated public information capture is realized, and the system scale can be quickly adjusted according to use requirements; according to the method, a financial segmented word bank and a positive and negative emotion word bank are constructed, the cost of manual annotation is reduced in the corpus construction process through mixed sample inspection, fuzzy clustering and other algorithms, the positive and negative emotion tendency probability of a text is calculated based on a supervised learning algorithm, emotion indexes are synthesized by adopting an auto-encoder algorithm, and the emotion judgment accuracy is improved; accordingto the distributed architecture, system crash caused by a single node fault is avoided, the validity of the emotion index is improved through the reconstructed financial emotion word bank and the textanalysis algorithm, the market emotion is dynamically reflected, and real-time capital market data is provided for a user.

The invention discloses an energy management system for a marine composite energy storage unit. A first current-voltage sampling module collects current and voltage of a load motor; the sampling data output end of the first current-voltage sampling module is connected with a first data input end of a PI regulator; a second current-voltage sampling module collects current and voltage of a generator set; the sampling data output end of the second current-voltage sampling module is connected with a second data input end of the proportional integral regulator; the output end of the proportional integral regulator is connected with a feed signal input end of a digital signal processing control module; the digital signal processing control module is connected with the control ends of a first DC / DC converter and a second DC / DC converter separately; the power supply output end of the generator set is connected with a direct current bus through a rectifier; the load motor is connected with the direct current bus through a bidirectional inverter; and the digital signal processing control module is connected with the control signal input end of the bidirectional inverter. According to the energy management system, the optimal energy efficiency state of the working state of the generator set can be achieved.

Disclosed are an assembly-type T-shaped mixed coupled wall and a construction method thereof. The assembly-type T-shaped mixed coupled wall comprises a first wall unit and a second wall unit which are connected together perpendicularly and form a T shape. Both the first wall unit and the second wall unit are prefabricated parts, and the first wall unit and the second wall unit are connected through a joint post-pouring belt. According to the assembly-type T-shaped mixed coupled wall, steel beams are used for replacing concrete beams and section steel columns are used for replacing edge constraint reinforced concrete embedded columns, so that the mixed coupled wall has better energy-dissipating capacity and progressive-collapse-resistant capacity than a traditional coupled wall; prefabrication and on-site installation are conducted at the same time, therefore, the problems that the quantity of wet construction on a construction site is large and a lot of construction waste is generated are solved, building operating requirements can be met conveniently, and assembly procedures can be simplified conveniently; after butt welding is conducted on joint short beams, high rigidity is formed between the wall units, therefore, the stability of wall bodies in the construction process is facilitated, the procedure that a shear wall is prefabricated to be used as a temporary support is omitted and the construction efficiency is guaranteed. The construction method can be widely applied to construction of mixed coupled walls in constructional engineering.

The invention discloses an axial flow fan ternary impeller with a vein-shaped structure and a nonuniform empennage. The axial flow fan ternary impeller comprises a hub, and a connecting piece for a shaft sleeve fixed on the hub. The axial flow fan ternary impeller further comprises twisted blades and splitter blades fixedly connected to the hub; the twisted blades include suction surfaces and pressure surfaces; wing-shaped grooves are formed in the tops of the twisted blades; vein-shaped grooves are formed in the upper half parts of the pressure surfaces of the twisted blades; the wing-shaped grooves are communicated with the vein-shaped grooves through exhaust ports; winglet projections and dense winglets are arranged at the tail parts of the suction furnaces of the twisted blades; the dense winglets are arranged on two sides of the winglet projections; parabola small holes are formed in the twisted blades; the splitter blades are arranged between two adjacent twisted blades; and the heights of the splitter blades are smaller than the heights of the twisted blades by one half.

The invention discloses a suspension hanger system and an angle adjusting unit thereof. The suspension hanger system comprises a fixing base, a base, a Y-axis translation unit, a rod body, an X-axis translation unit, a telescopic rod, a Z-axis translation unit and an angle adjusting unit, wherein the base is connected with the fixing base; the Y-axis translation unit is connected with the fixing base and the base; the base moves along a Y-axis relative to the fixing base through the Y-axis translation unit; the rod body is connected with the base; the X-axis translation unit is connected with the rod body and the base; the rod body moves along an X-axis relative to the base through the X-axis translation unit; the telescopic rod is connected with the rod body; the Z-axis translation unit is connected with the rod body and the telescopic rod; the telescopic rod moves along a Z-axis relative to the rod body through the Z-axis translation unit; the angle adjusting unit is connected with the telescopic rod. By adopting the suspension hanger system, fine turning on a projection device in positions of six free angles can be achieved, so that a user is convenient to simply adjust the projection device in an appropriate position.

The invention discloses liquid milk and a preparation method of the liquid milk. The liquid milk comprises, by weight, 99.149996%-99.799999% of concentrated milk, 0.05%-0.2% of hydrolyzed egg yolk powder, 0.1%-0.5% of hydrolyzed collagen, 0.05%-0.15% of casein phosphopeptide and 0.000001%-0.000004% of vitamin D. The preparation method of the concentrated milk includes the step of enabling raw milk to be concentrated under the condition of 40DEG C-60DEG C and 10000Pa-20000Pa until the calcium content is 120-150mg / 100mL. According to the preparation method of the liquid milk, the quality of the liquid milk is improved, the calcium content in the milk is improved, and the liquid milk is safe, comprehensive in nutrition, good in stability, high in calcium content and balanced in calcium-phosphate proportion. Calcium ion absorption, bone matrix strengthening, increase of the numbers of osteoblast and osteoclast, the improvement on the activity of the osteoblast and the osteoclast and cartilage tissue protection are taken into consideration, and the liquid milk is good in mouthfeel and taste and can be easily digested and absorbed by human bodies.

The invention relates to the field of low-emission combustion chambers, in particular to a central region combustor with the staged combustion function. The problem that the requirement for the high outlet temperature can hardly be met by a combustion chamber can be solved. The central region combustor comprises a central body assembly and a nozzle assembly. The central body assembly is provided with a central barrel, an outer central body wall and a first-stage cyclone. A main fuel channel is formed between a nozzle shell and the central barrel. An auxiliary fuel channel is formed between the outer central body wall and the central barrel. The nozzle assembly is provided with the nozzle shell and a fuel spray rod. The nozzle shell is provided with a fuel path. The fuel spray rod is provided with main fuel injection holes and auxiliary fuel injection holes. Auxiliary fuel through holes corresponding to the auxiliary fuel injection holes one to one are formed in the central barrel. By the adoption of the central region combustor, the emission performance of a combustion chamber at the high flame temperature can be optimized; and due to the additional arrangement of the auxiliary fuel channel, the impact effect of cooling air on a downstream central backflow region is eliminated, and instable combustion and reduction of combustion efficiency of a central region are prevented.

The invention discloses a method for hotel group division and demand forecasting. The method includes the steps that firstly, a plurality of business areas of the same city are corrected; secondly, all hotels in all the corrected business areas are divided into a plurality of hotel groups; finally, the demand forecasting results of all the hotel groups in forecasting months are obtained. According to the method, hotel group division is carried out on all the hotels of the same city, the sale quantity of the hotel groups is further forecasted, the difficult forecasting or the unstable forecasting result, caused by sparsity, of single piece of hotel data is reduced, and the direction guiding effect on business procurement is achieved; the forecasting accuracy and the coverage degree of the hotels can be increased.