68 results about "Scientific theory" patented technology

The invention discloses a landslide hazard multi-stage comprehensive monitoring and early warning method, and relates to a landslide monitoring and early warning method. The method includes the steps of establishing a four-stage comprehensive early warning model based on three early warning indexes according to the topographic and geological conditions of typical landslide hazards, determining a model parameter type and an early warning critical value index through the indoor and outdoor typical rainfall landslide model experimenting method, carrying out statistic analysis of the correlation between typical landslide hazards and rainfall capacity, and establishing a mathematical calculation method suitable for typical landslide hazard early warning. Through the combination with specific monitoring data, monitoring information is fed back in time, multi-hydrologic-year detection and correction are conducted on a hazard early warning mathematical model, and then the landslide hazard multi-stage comprehensive monitoring and early warning method is obtained. A visual critical value domain discrimination graph, an analysis curve and an early warning standard introduction are given. By means of the method, the quality and effect of rainfall landslide monitoring and early warning are improved, and a scientific theory and a technological method are provided for improving the accuracy in geological hazard monitoring and early warning.

The invention discloses a modeling and controlling strategy for a central air conditioner with a fresh air system. The modeling and controlling strategy includes the following steps of building a thermodynamic model of a building where the central air conditioner is installed, namely, the relation between indoor and outdoor temperatures and the cold capacity of the building; building an energy consumption model of the central air conditioner with the fresh air system, namely the relation between the air conditioner load and decision variables; determining a control strategy, namely determining the target function, control variables, constraint conditions and the like; and working out the highest adjusting potential of the load of the central air conditioner, comparing the adjusting results of different control modes, researching the system load of the central air conditioner and participating in load tracing. By finely building the model and determining the cooperative optimization strategy of the control variables, a scientific theory support is provided for the central air conditioner with the fresh air system to participate in operation of a power system.

The invention belongs to the technical field of testing equipment of buildings and relates to a pile soil interface shear simulation tester of an opened concrete pipe pile, wherein a screw rod is vertically installed on an operation platform, an upper end and a lower end of a spring are respectively fixed on a dismountable spring upper fixation plate and a dismountable spring lower fixation plate, a testing soil sample is placed inside an upper shear box, the top part is flush with the dismountable spring lower fixation plate, and the left side face of the upper shear box is rigidly connected to the operation platform; a concrete sample is placed inside the lower shear box, a slide track is disposed on the operation platform, the operation platform is connected to the lower shear box by a roller, and a numerical control motor is rigidly connected to the lower shear box; and a vertical displacement sensor is installed on the dismountable spring lower fixation plate, a horizontal displacement sensor is installed between the upper shear box and the lower shear box, and a load sensor is placed on a first steel rod on the left side of the upper shear box. The pile soil interface shear simulation tester of the opened concrete pipe pile has a simple structure, is operated conveniently, has scientific theories, obtains accurate testing results, has low cost and is applied widely.

The invention relates to the field of electrical power system dynamic reactive power control, in particular to a load characteristic considered power grid dynamic reactive power optimization system and method. One port of a load state collector is connected to a load dynamic reactive power regulation controller, collected and processed power grid load characteristics are transmitted to the load dynamic reactive power controller, the load dynamic reactive power controller is connected with a load dynamic reactive power executor, and the load dynamic reactive power executor is used for guiding an electrical power system to operate according to optimizing results of the dynamic reactive power controller. According to the load characteristic considered power grid dynamic reactive power optimization system and method, data required by reactive power optimizing are directly read from an actual power grid, system hardware investments are effectively saved, characteristic variables of factors of load characteristics, load voltage fluctuation and the like are extracted, real-time changing conditions of the power grid are exactly reflected, and the computing complexity is effectively reduced. Powerful scientific theory supports are provided for the field of dynamic reactive power compensation in the future, dynamic reactive power compensation of the power grid is achieved with the minimum reactive power compensation quantity, and thereby enormous economic benefits are achieved.

The synthetic closures disclosed herein are made from novel compositions that comprise a thermoplastic elastomer, polypropylene, a foaming agent, and a plurality of gas-encapsulating thermoplastic microspheres. Without necessarily prescribing to any scientific theory, it is believed that the gas-encapsulating thermoplastic microspheres in combination with the other ingredients provide a feed material especially useful for manufacturing synthetic closures having an appropriate combination of physical properties like, for example, density, oxygen permeability, hardness, extraction or removal force, compression percent recovery (over selected periods of time), and compression force (to compress closure to a smaller diameter).

The invention relates to the technical field of power systems and automation thereof, and particularly relates to a virtual power plant double-layer optimization model considering network constraints.The method comprises the specific steps of establishing an upper-layer virtual power plant profit maximization model, establishing a lower-layer market clearing model considering network constraints,converting the double-layer optimization model into a mathematical programming model with balance constraints, and converting the mathematical programming model with the balance constraints into a mixed integer programming model. In order to overcome the defect that line transmission power constraint is not considered in current related research, internal optimization of the virtual power plant and interaction with a market operator and other conventional units are fully considered, a market bidding optimization model in which the virtual power plant participates is established, an optimization bidding strategy is generated under the condition that line power transmission is blocked, the superiority of the bidding strategy is embodied, the profit of the virtual power plant is improved, and the model is close to the practical situation. Scientific theoretical support is provided for the virtual power plant to effectively participate in the power market in future.

The invention discloses an optimal electricity purchasing method for a load retail dealer under electricity market environment. The optimal electricity purchasing method for the load retail dealer under the electricity market environment comprises the following steps of enabling a retail dealer to collect history load data at nine and six every day of governed users; selecting load data based on time dimension in one year of the users to be performed on clustering analysis and classifying the load into typical types; extracting a monthly typical load curve according to a clustering analysis result; establishing a load optimization clustering model in consideration of complementarity in the time sequence of load characteristics of different users and enabling a retail dealer economic benefit to be best by optimizing the electricity purchasing scheme. The optimal electricity purchasing method for the load retail dealer under the electricity market environment optimizes and models the electricity purchasing behavior of the retail dealer in the electricity market, provides scientific theory support for operation of the electricity market and fully plays the operation efficiency.

The invention discloses mosquito-repelling and itching-relieving floral water. The floral water is prepared from 3-6 parts of lavender essential oil, 7-11 parts of folium artemisiae argyi oil, 6-9 parts of eucalyptus oil, 11-16 parts of mint, 13-20 parts of wild chrysanthemum flowers, 6-9 parts of propolis, 90-120 parts of deionized water, 2-6 parts of emulsifier, 6-9 parts of flos lonicerae, 1-3 parts of wrinkled gianthyssop herb, 5-7 parts of amur cork tree bark, 5-8 parts of radix salviae miltiorrhizae, 5-9 parts of flos campsis, 6-12 parts of liquorice roots, 65-75 parts of ethyl alcohol and 1-3 parts of mint derivatives. Compared with the prior art, the floral water is based on the traditional Chinese medicine scientific theory, flos lonicerae, wild chrysanthemum flowers, wrinkled gianthyssop herb, amur cork tree bark, radix salviae miltiorrhizae, flos campsis and liquorice roots are selected as raw materials for extraction according to the synergistic effect of Chinese herbs, and the prepared mosquito-repelling floral water has a good mosquito-repelling effect. By repeated verification of the inventor, the floral water causes no toxic or side effect to a human body after being used for a long term.

The invention relates to a quantitative research method for landslide prediction and belongs to the field of basic scientific theory and application basis, and natural disaster prediction and prevention research. The quantitative research method comprises the following steps: determining a new principle and a new formula which are used for the landslide prediction; observing a landslide surface and determining landslide quality; observing and determining acting force and acting amount which are used for controlling the landslide movement; observing and calculating virtual acting amount; solving property parameters (including virtual degree and solid degree) of a landslide body movement environment; calculating virtual degree change rate or solid degree change rate; performing landslide prediction, calculation and analysis; and submitting landslide prediction achievement report and a landslide prediction achievement so as to provide reliable evidences for publishing landslide disaster occurrence time, places and strength, and formulating landslide disaster prevention measures by the government. According to the quantitative research method, a system theory, an equation and a quantitative method which are used for researching a landslide phenomenon and carrying out landslide disaster prediction and prevention research, and a quantitative method for evaluating the stability of side slope substances are given, so that the landslide prediction theory can be really scientized, systematized, theorized and practical.

The invention discloses a method for assessing and sorting citation network academic influences based on credibility, and belongs to the technical field of academic influence assessment. By combining the characteristics of a citation network, a series of rules are defined according to background information of an article, a seed set mechanism is selected by improving a TrustRank algorithm and an Anti-TrustRank algorithm, and after a reputation value and a non-reputation value of a network node is obtained through cyclic iterative calculation, a score is obtained based on results of the reputation value and the non-reputation value; according to a descending sorting result of a final comprehensive reputation value, the result of academic influence sorting of scientific literature in the citation network is obtained and output. The invention aims to provide the reasonable and fair assessment method which can assess the influences of the literature accurately and then select a high-quality paper material in a subject, and researchers can also search for literature materials quickly, grasp a current hot research direction, and allocate more time in the study of scientific theory; the method for assessing and sorting the citation network academic influences based on the credibility has important theoretical significance to understanding the structure and propagation characteristics of the citation network and assessing the influences of the literature.

The invention discloses a traditional Chinese medicine formulation for curing senile dementia and a preparation method thereof. The traditional Chinese medicine formulation is made of ginseng, milk veteh, epimedium, fumitory, rhizoma gastrodiae, angelica, radid polygoni multflori preparata, sealwort and grassleaf sweelflag rhizome which are performed by an ethanol extracting technology and a poach technology. The traditional Chinese medicine formulation is ground by the theory of traditional Chinese medicine and adopts a scientific theory and an advanced technology to develop the traditional Chinese medicine formulation with good curative effect and fewer side effects and being used for curing the senile dementia. The experimental research shows that the traditional Chinese medicine formulation can improve the learning memory ability of an AD rat model. Meanwhile, the traditional Chinese medicine formulation can improve the antifatigue and anti-stress ability of an organism and has good curative effect on the kidney empty. In addition, the invention also provides an optimized preparation method suitable for the industrial production.

The invention relates to a wave energy resonance meridian point qi therapy sauna room. The sauna room comprises a wood floor layer, a wall surface layer, a ceiling layer, a sauna furnace, an anti-explosion lamp, a bench, a sandglass, a wooden grid air inlet, a small sliding door and the like, wherein the surfaces of the wood floor layer and the bench and the surrounding wall surfaces are painted with a wooden paint blending with far infrared nanometer powder or negative ion nanometer powder at intervals; and the paint is provided with a protrusion, which is prepared from special ceramic nanometer powder undergoing the rubber and / or plastic blending deep magnetization treatment or the negative ion treatment and keeps a certain distance from the bottom plane and of which the protruding surface is an arc-shaped curved surface. The sauna room closely and scientifically combines a special structure with materials, and the structural design of the sauna room is closely combined with scientific theory, meridian acupuncture therapy, foot therapy massage and qi therapy in the Chinese medicinal science, so that unexpected effects are achieved; moreover, the sauna room is suitable for the qi therapy and sauna therapy of various groups, particularly the middle and old aged.

The synthetic closures disclosed herein are made from novel compositions that comprise a thermoplastic elastomer, polypropylene, a foaming agent, and a plurality of gas-encapsulating thermoplastic microspheres. Without necessarily prescribing to any scientific theory, it is believed that the gas-encapsulating thermoplastic microspheres in combination with the other ingredients provide a feed material especially useful for manufacturing synthetic closures having an appropriate combination of physical properties like, for example, density, oxygen permeability, hardness, extraction or removal force, compression percent recovery (over selected periods of time), and compression force (to compress closure to a smaller diameter).

The invention relates to an edible oil, and in particular relates to a vigour and nutrition balanced blend oil with a reasonable fatty acid ratio. The invention aims to solve the defect of blindly making the blend oil because fatty acid is not insufficiently researched in the present diet food, and provide a vigour and nutrition balanced blend oil with a reasonable fatty acid ratio. The purpose of the invention is realized as follows: the vigour and nutrition balanced blend oil comprises the following plant oils in parts by weight: 30-40 parts of corn oil, 10-20 parts of camellia oil, 10-15 parts of sunflower seed oil, 30-40 parts of colleseed oil, 5-10 parts of olive oil and 5-10 parts of peanut oil. The plant oils are mixed and stirred for 15 minutes according to the parts by weight to obtain the blend oil disclosed by the invention. Compared with the prior art, the vigour and nutrition balanced blend oil has the following characteristics of improving the balance of the fatty acid and lowering the risk of cardiovascular diseases; Compared with the blend oil with the ratio of 1:1:1 which is advocated at present, the vigour and nutrition balanced blend oil has a more scientific theory.

As disadvantages of chemical nitrogen production and a large number of used chemical fertilizers become increasingly obvious and the effect of increasing yield becomes increasingly unobvious, the invention provides a biological nitrogen production method. The core of the method is that: according to the characteristics of different nitrogen-fixing microorganisms, the relation between the different nitrogen-fixing microorganisms and plants, different living conditions of the different nitrogen-fixing microorganisms and the plants, and the mechanism principle and related scientific theories of biological nitrogen fixation, and by various measures, systematic coordination, overall cooperation and combined action, the nitrogen-fixing microorganism in soil are cultured and increased, and the nitrogen fixing capacity of the nitrogen-fixing microorganisms is improved; and the nitrogen-fixing microorganisms are used to produce nitrogenous fertilizers so as to meet the requirement of plant growth on nitrogen. The method has the advantages of capacity of continuously reducing the using amount of the chemical fertilizers, gradually recovering and improving soil fertility, improving the stress resistance and quality of crops and saving resources, environmental-friendliness, circular replaceability and sustainable development.

The invention discloses a technology for remanufacturing (green) a compressor and a compressor remanufacturing enterprise (factory), and belongs to the field of general machinery. Based on a scientific theory of limitless service life design of parts such as a crank shaft box accounting for most of the total weight of the compressor, a crank shaft and a cylinder body, the conventional manufacturing, lossless detection and maintenance technology is succeeded; and a modern cold-spraying technology, a multifunctional computer optimal design, a vibration, reliability and structural completeness calculation technology and an intelligent monitoring and flexible measurement integrated technology are used. Reconstruction of a remanufacturing factory is provided; old machines which serve as waste materials fed into a steel refining furnace are subjected to green manufacturing by a scientific and multifunctional new technology in order to solve the problems of repeated energy consumption and pollution increasing which are caused by re-smelting the old machines; due to the remanufactured new machine, subsequent technology transformation of an enterprise is relatively high in adaptability; compared with the old machines or new machines of the same type, the remanufactured new machine saves energy, reduces consumption and runs safely; and the technology has the actual benefits of turning old into new and turning waste into treasure along with low investment and short period.

The invention discloses a meteorological influence power quantity decomposition prediction method, comprising the following steps: S1. Setting a base month: the default spring base month is May, and the autumn base month is October; S2: Calculate Meteorological Correlation: Calculate data separately in winter and summer. If the month belongs to November to April, the winter correlation is calculated. If the month belongs to July to September, the summer correlation is calculated, but the base month is not involved in the calculation. The correlation formula is shown in the description to obtain the correlation data. S3: Calculate monthly meteorological impact power growth rate: for the correlation data in S2 via yt=yi-Yj and delta = (yt / yj) * 100% formula to obtain monthly meteorological influence power growth rate and show correlation coefficient. According to the scientific theory, it is concluded that meteorological factors are the important factors that affect the load forecasting,and the accuracy of load forecasting is improved, and the error is small.

The invention relates to a method and devices for producing by-product of purified water by using treading gymnastic devices. Nowadays, body-building apparatus become more and more popular to the people, but normally, the energy released by human body during the body building is not reasonably recycled. The invention combines a treading gymnastic device with a tap water filter; a body builder simulates the movement of riding a bike to drive a speed-change mechanism by a transmission mechanism and then drive a water pump to turn at high speed, so that the tap water in a tap water tank is pumped into a filter unit for filtration; or a generator is driven by the transmission mechanism and the generated power after being regulated by an electrical governor is delivered to an electromotor which runs and drives the water pump to turn at high speed, so that the tap water in the tap water tank is pumped into the filter unit for filtration. The invention has the advantages of simple structure, scientific theory, integration of fitness and entertainment and production, energy saving, wide application, safety and reliability, high practical value, convenient and flexible operation and being favorable for popularization.

The invention provides an apple planting management system based on soil analysis. At present, management, nursing and other measures for apple planting soil are mainly relied on planting experience of managers, fertilization and cultivation lack scientific bases and effective guidance based on soil features, and therefore the yield of apples is affected. In order to solve the problems above, a guidance system of nursing soil on the basis of scientific theories is provided. The guidance system includes a soil information collecting module, an analysis module and a nursing scheme generating module. By combining soil conditions of an apple plant plantation with geographic positions, detection and analysis are carried out, an actually effective scheme for fertilization and cultivation is provided for the planting managers, and the quality and yield of the apples are ensured.

The invention relates to a gene regulation continuous fermentation hybrid power system. The system solves a glycerin microorganism fermentation control problem by utilizing an optimal scientific theory. The glycerin microorganism fermentation control problem comprises control factors; and the control factors comprise biomass, extracellular glycerin, extracellular 1,3-PD, acetic acid, ethanol, intracellular glycerin, intracellular 3-HPA, intracellular 1,3-PD, mR, free regulatory proteins R, MGDHt, glycerol dehydratase GDHt, MPDOR and 1,3-PD oxidordeuctase PDOR. According to the gene regulation continuous fermentation hybrid power system, balance is found between mathematical modeling and numerical value accuracy, a possible metabolism path is proposed, a 14-dimension nonlinear hybrid power system with discrete path parameters and continuous system parameters for continuous fermentation is established, and an optimal control problem is structured by using a constraint condition.

The invention discloses a making method for a sachet capable of calming nerves and helping sleep, and belongs to the technical field of the sachet making method. The making method comprises the following steps: according to a mechanism of calming nerves and helping sleep, using a traditional Chinese medicine scientific theory as the foundation, and selecting more than ten Chinese herbal medicines, such as Cinamomum camphor leaves, chamomile, Hop, bergamot, and wild jujube leaves, wherein the Chinese herbal medicines have the efficacy of relieving Qi stagnancy in liver to dissipate sorrow, and tranquilizing by nourishing the heart through the synergistic effect, and are capable of remarkably improving insomnia symptoms of a patient, and relieving anxiety and depression symptoms of the patient. In addition, traditional Chinese medicine powder for mosquito repelling, such as selfheal, flos caryophylli and perilla leaf, is compounded, so the sachet has the mosquito repelling effect while the efficacy of calming nerves and helping sleep is realized, is capable of purifying the air, and has the advantages of low cost, effectiveness, safety, environment-friendliness, non-toxicity and harmlessness to human and environment, and promotion of traditional culture.

The invention relates to a method for calculating construction performance and a labor remuneration standard with an action basic concept, and belongs to the fields of basic scientific theories, application basic research and labor management scientific research. A novel construction performance calculation formula W=AF=A-AT=EA is obtained through a relation among the action quantity, virtual action quantity and construction difficulty generated by construction attendance. According to a labor remuneration standard calculation method, a formula Y=TYb for calculating a construction engineering labor remuneration calculation standard and a formula B=YN for calculating the sum of labor remuneration are deduced via a relation law among unit engineering accrued charge, engineering construction or production difficulty, and the unit engineering cost of standard difficulty engineering. A novel way for quantitative research of the relation among attendance, performance, labor and remuneration is opened up on the basis of an action principle, so that quantitative research of labor management science is realized. The method has important significance to the development and completion of basic theoretical science, basic theory applied science and labor management science.

The invention discloses a severest ground motion selection method based on Pareto multi-objective optimization. Severest ground motions are selected based on Pareto multi-objective optimization, a plurality of ground motion intensity indexes serve as targets, large sample data in a ground motion base are optimized and selected, small sample severest ground motions with larger collapsing force are selected, elastic-plastic time-history analysis cost is effectively reduced, a equivalent single-degree-of-freedom system based on anti-seismic structures is provided in a ground motion intensity index step, correlation analysis of response between IMs and the anti-seismic structures under the single-degree-of-freedom system is performed, high efficiency of selection of the ground motion intensity indexes is effectively solved, sensitive degrees of different anti-seismic structures for different ground motion indexes are considered, high-correlation IMs are comprehensively selected for the different ground motion indexes, selected high-correlation IMs vector groups serve as targets, dominance relation among different ground motions is determined by the aid of a Pareto multi-objective optimization method, and a scientific theory basis is provided for selection of the severest ground motion.

The invention discloses a dynamic evaluation, regulation and control method for ecological restoration benefits of an engineering disturbance slope in a high mountain area. A dynamic evaluation system for the ecological restoration benefits of the engineering disturbance slope in the high mountain area is constructed; a reasonable regulation and control scheme is formulated according to the evaluation result; and regulation and control are implemented to solve the real-time problems in ecological restoration of the target slope. According to the evaluation system, a hierarchical structure model for slope ecological restoration evaluation is established, an optimal evaluation index weight and an index evaluation standard are formulated, and comprehensive evaluation is performed on slope ecological restoration benefits according to the evaluation index weight and the index evaluation standard. And through circular evaluation and regulation, optimization of a slope ecological system is achieved. According to the method, the difference and regional characteristics of the high mountain area are fully considered, a real-time quantitative and qualitative evaluation and scientific regulation and control scheme is provided for the ecological restoration benefits of the engineering disturbance slope in the high mountain area, and the scientific theory of the engineering disturbance slope vegetation restoration technology can be improved.

The invention provides a traditional Chinese medicine composition with a protective function on alcoholic liver injury and a preparation method thereof, and belongs to the technical field of traditional Chinese medicines. The traditional Chinese medicine composition is prepared from, by weight, 2-10 parts of radix puerariae, 2-10 parts of hovenia dulcis thunb, 2-10 parts of radix paeoniae alba and2-10 parts of licorice root. The traditional Chinese medicine composition has the effects of relieving alcoholism, helping produce saliva and slaking thirst, smoothing liver and relieving pain. The traditional Chinese medicine theory and the modern scientific theory serve as guidance, L9(34) orthogonal compatibility testing is used, the compatibility proportion of the raw material components is determined with extremely-low-density lipoprotein in serum of miceand malonaldehyde and glutathione in the liver as indexes, and the traditional Chinese medicine composition with the protective function on alcoholic liver injury is prepared. Pharmacodynamic research shows that the composition can be used for improving related indexes of the acute and subacute alcoholic liver injury mice. The composition is suitable for boozy people, and is clear in effective component and controllable in quality.

The invention provides a method for detecting off-flavor substances from fugitive emission of a pickles plant by adopting an SPME (solid-phase microextraction)-off-flavor analysis system and belongs to the technical field of off-flavor analysis. According to the method, extraction is performed on the off-flavor substances from fugitive emission of the pickles plant with the SPME technology, and detection is performed on the basis of MRM method parameters and sensory information of Shimadzu Off-Flavor compounds configured in an off-flavor analysis system. With adoption of the SPME technology, sampling, extraction and concentration are integrated, the operation is simple and rapid, the defect that the detection selectivity and sensitivity of the conventional detector cannot be realized simultaneously is overcome by means of a GC-MS / MS technology, components causing off-flavor are judged accurately on the basis of the sensory information of flavor components in an off-flavor analysis database, the problem that off-flavor still exists when gas emission meets the standard during detection by an environmental protection department is solved, the method has great significance in monitoring and supervision of fugitive emission of the pickles plant, and scientific theory is proposed for off-flavor detection of waste gas to a certain extent.

The invention discloses a construction method for a representative volume element (RVE) model of an Ni3Al-based alloy. The method comprises the steps that (1) an alloy microstructure is observed through a scanning electron microscope; (2) the distribution law of microcosmic geometrical characteristic parameters of the alloy microstructure is subjected to analytical statistics; (3) a constraint condition of a strengthening phase in an RVE is set; (4) coordinates of a key point of the strengthening phase in the RVE are generated; and (5) the RVE is generated. The method has the advantages that the generated RVE contains sufficient microcosmic information, covers microcosmic uncertainty of a material and can effectively describe mechanical properties in the material; by adopting the generated RVE to carry out mechanical analysis, a mechanical response of the material under a load can be predicted more effectively, and therefore the method has certain scientific theory significance and engineering application value.

The invention discloses a modeling and controlling strategy for a central air conditioner with a fresh air system. The modeling and controlling strategy includes the following steps of building a thermodynamic model of a building where the central air conditioner is installed, namely, the relation between indoor and outdoor temperatures and the cold capacity of the building; building an energy consumption model of the central air conditioner with the fresh air system, namely the relation between the air conditioner load and decision variables; determining a control strategy, namely determining the target function, control variables, constraint conditions and the like; and working out the highest adjusting potential of the load of the central air conditioner, comparing the adjusting results of different control modes, researching the system load of the central air conditioner and participating in load tracing. By finely building the model and determining the cooperative optimization strategy of the control variables, a scientific theory support is provided for the central air conditioner with the fresh air system to participate in operation of a power system.

The invention discloses a document classification method based on variances. The document classification method based on the variances comprises the steps of (a) gathering enough classification-specific scientific and technical literatures, novels and essays as training samples; (b) performing word segmentation through an existing word segmentation method and calculating word frequencies; (c) performing normalization processing on the word frequencies; (d) calculating the variance of the word frequencies in each document; (e) concluding intervals of the variances of the word frequencies; (f) processing the documents to be classified; (g) judging drop-in intervals of the variances; (h) acquiring document classifications according to the drop-in intervals. By means of the document classification method based on the variances, the documents to be classified can be classified automatically, reasonably and scientifically according to different variances of the word frequencies caused by wording features of scientific and technical literatures, novels and essays, and high efficiency is achieved while the classification accuracy rate is ensured. Therefore, the theoretical foundation is laid for classifying existing literatures into scientific and technical literatures, novels and essays, and a complete, scientific theory method is provided.