169results about How to "Reduce potential harm" patented technology

The invention provides a photocatalyst paint composition, comprising 0.5-10wt% of photocatalyst, 5-15wt% of adsorbent, 5-10wt% of dispersing agent, 3-5wt% of binder, 0.5-3wt% of foaming agent, 10-30wt% of organic solvent and the balance of water. The paint composition is characterized in that the adsorbent is in a mixed powder structure in which the adsorbent is cladded by the photocatalyst. The photocatalyst paint composition can be applied to surface of interior wall material and can remove indoor air pollution for a long term, so as to create a safe and clean indoor environment for human.

The pesticide composition consists of emamectin benzoate 0.1-5 wt%, effective component B 0.2-30 wt%, synergist 0.1-5 wt%, emulsifier 5.0-20 wt%, and solvent 45-90 wt%. The effective component B is chlorfenapyr, diafenthiuron, fipronil, beta-cypermethrin, cyhalothrin or their any mixture. The present invention can prevent and kill several kinds of pests, and this can reduce pesticide consumption, lower agricultural cost and reduce pollution.

The invention discloses an algorithm for detecting object and passenger behaviors on an escalator floor plate based on machine vision, which comprises the steps of 1) acquiring video images; 2) building a background model by using a CodeBook algorithm, and extracting an object and passenger foreground image; 3) performing head feature extraction on the foreground image by using an HOG descriptor; 4) performing head detection on the foreground image by using an AdaBoost cascade classifier; 5) tracking a passenger target by using a Kalman filter; 6) performing contour detection and ellipse fitting on the foreground image by using a Fitzgibbon algorithm; 7) removing the passenger target in the step 6), and tracking an object target by using the Kalman filter; and 8) and judging behaviors of the object and the passenger through analyzing the moving speed and the moving direction of center coordinates of the object and the passenger. According to the algorithm, detection and analysis can be performed on object and passenger behaviors on the escalator floor plate, an emergency plan can be started timely when an exception occurs, and potential hazards of an exceptional situation are enabled to be minimized.

The invention relates to a technology for pre-treating residual sludge, in particular to a microwave-hydrogen peroxide synergism-based method and device for treating residual sludge. In the method, a hydrogen peroxide solution is fed according to the mass ratio of pure hydrogen peroxide to the dry weight of the sludge being 0.2-2; under the normal-pressure opening condition, the high-efficiency decomposition of the residual sludge is realized by adopting a microwave-hydrogen peroxide technology and the subsequent biological availability of the residual sludge is improved. Before reaction, the treatment effect of the residual sludge is enhanced by controlling the condition of pH value. The device disclosed by the invention mainly comprises a heat exchanger and a microwave reactor. The method disclosed by the invention has the advantages of simple process, short flow and high efficiency. In addition, the treated residual activated sludge can be recycled. The device disclosed by the invention has less investment and is suitable for various medium-small systems for treating the residual sludge.

The invention discloses a method for manufacturing fracturing fluid, and belongs to the technical field of chemicals for oil and gas production. The method is characterized in that refined cotton with a high polymerization degree is used as a cellulose raw material, and celluloses are alkalified and etherified and are subjected to micro-crosslinking to obtain a high-viscosity thickening material (semi-synthesis polymer gel) with high salt resistance; the high-viscosity thickening material is used as a thickener and a substitute for guar gum, and metal aluminum salt or titanium salt or zircon salt or a composite of the metal aluminum salt, the titanium salt and the zircon salt is used as a crosslinking agent to develop the all-clean aqueous fracturing fluid. The method has the advantages that shortcomings of the traditional guar gum fracturing fluid and a fracturing technology of the traditional guar gum fracturing fluid are overcome; the fracturing fluid is high in viscosity and salt resistance and excellent in high-temperature sand-carrying and sand-suspending performance; the fracturing fluid is free of residues after gel breaking, is low in damage to formations and is not easy to mildew, and potential damage to reservoir due to gel breakage dead space and accumulation of residual gel is reduced; the fracturing fluid can resist the high temperature of 150 DEG C.

The invention provides high oxidation resistance medium/long chain fat emulsion injection (C8-C24) and a preparation method thereof. The fat injection consists of soybean oil for active component injection, median chain triglyceride oil, emulsifier, isoosmotic adjusting agent, metal ion chelation agent and water for injection. The method comprises the following steps: under inert gas environment, adding the emulsifier and the coemulsifier into the heated soybean oil for injection and the median chain triglyceride oil, and uniformly stirring the mixture at high speed serving as oil phase; uniformly mixing the isoosmotic adjusting agent and the metal ion chelation agent with proper water for injection, and filtering the solution serving as water phase; in high speed stirring, combining the oil phase and the water phase, continuously stirring the mixture to foremilk at high speed, adjusting the pH of the foremilk to be between 9.0 and 10.0, adding the water for injection to the volume of 1,000ml; homogenizing the foremilk after the foremilk is uniformly mixed by a high pressure homogenizer until the milk particles are qualified; and preparing the medium/long chain fat emulsion injection through filling, nitrogen introducing, plugging, capping, sterilizing and cooling after filtration.

The invention discloses a preparing method and a use method of a chlorinated organic compound polluted soil repairing agent. The preparing method comprises: adding bentonite particles into deionized water, agitating, centrifuging at a low speed and removing particles of which the particle size is larger than 2 micrometers; adding the bentonite particles into a 0.1M FeCl3 solution according to an adding amount of 20-50g/L, agitating, mixing, centrifuging to remove supernatant, obtaining Fe3+ saturated bentonite particles, and washing; putting iron ion saturated bentonite particles into de-oxidized and deionized water, regulating the pH of a solution to 2 to 3.5, rapidly adding NaBH4 into particle paste under inert gas protection, rapidly covering a bottle cap, reacting for 1-3 minutes at a room temperature, and centrifuging at a high speed so as to obtain supported type ultrafine zero-valent iron; and 4), mixing alcohol of which the purity is higher than 95% with the supported type ultrafine zero-valent iron according to a ratio of 20-40:1, preparing the repairing agent, sealing and storing. Chlorinated organic compound polluted soil is synchronously treated by using an organic cosolvent and the zero-valent iron. The method can improve the soil repairing efficiency under the condition of saving cost and lowering actual operation difficulty.

The invention discloses an escalator floor plate video monitoring method by combination of machine visual sense and infrared array. The method includes the steps of acquiring video images and infrared images, 2) coordinate registering for the video images and infrared images, 3) using CodeBook algorithm to establish a background model, extracting article and passenger foreground images, 4) using infrared images to detect pedestrians in foreground images, 5) using a Kalman filter to track passenger targets, 6) using Fitzgibbon algorithm to conduct contour detection and ellipse fitting for the foreground images, 7) eliminating passenger targets in 6) and using the Kalman filter to track article targets, and 8) monitoring the floor plate area by analyzing the moving speed and moving direction of the articles and passenger center coordinates. Articles and passenger behavior on an escalator floor plate can be detected and analyzed through the algorithm. When abnormity occurs, an emergency solution can be timely started to minimize the potential damage of the abnormity.

The invention discloses a natural plant preservative containing shampoo for children, which comprises sodium lauroamphoacetate, cocamidopropyl betaine, propylene glycol, glycol distearate, phenoxyethanol, caprylyl glycol and a preservative; and the shampoo is characterized in that the preservative is a plant preservative, and the plant preservative comprises the following components in parts by weight: 20-40 parts of a rhubarb extracting solution, 5-10 parts of a cassia bark extracting solution, 5-20 parts of a pericarpium granati extracting solution, 10-20 parts of a magnolia biloba extracting solution, 10-35 parts of a saxifraga stolonifera extracting solution, and 10-15 parts of a white ilicifolius extracting solution. The shampoo disclosed by the invention can be applied in the technical field of shampoos for children; and according to the invention, through the addition of the natural plant preservative, the effective reduction of the addition amount of the artificially synthesized preservative is realized, and then the safety of the shampoo for children can be further effectively guaranteed.

Embodiments of the invention provide a method for green extraction and determination of a variety of compounds in the Chinese herbal compound drug Naoxintong. The method comprises the following steps: (1) acquiring liquid extract of a Naoxintong sample by using a matrix solid-phase dispersion extraction process, wherein the mass of the Naoxintong sample is 10-50 mg, an adsorbent is magnesium silicate, a mass ratio of the Naoxintong sample and the adsorbent is (2: 1) to (1: 5), an eluent is methanol with a concentration of 60% to 100 % and contains 0-0.2% by volume of formic acid, the ratio of the mass of the Naoxintong sample to an elution volume is 25-42 mg/mL, and grinding time of the Naoxintong sample and the adsorbent is 0-8 minutes; and (2) analyzing the liquid extract of the Naoxintong sample by using ultra-high performance liquid chromatography so as to determine the contents of the compounds in the Chinese herbal compound drug Naoxintong. The determination method provided by the invention can provide a theoretical basis for the validation studies of traditional Chinese medicines and provide technical support for the quality control of Naoxintong.

The invention discloses a debris flow sediment transport control method suitable for a broad valley type debris flow gully. The transverse width of the broad valley type debris flow gully is 50-400 m, and the longitudinal gradient of a gully bed is smaller than or equal to 15 degrees; a sediment transport groove in the gully bed is backfilled by utilizing existing loose solid materials on the gully bed in the flowing area and accumulation area of debris flow in the gully, and the ground line curvature of the backfilled groove is smaller than three percents; multiple sand blocking cob walls distributed at a certain interval are transversely built by utilizing the existing loose solid materials on the gully along the gully contour line in the flowing area and accumulation area of the debris flow in the gully; deep-rootedness arbores or bamboos are planted at the edges of the cob walls along the trend of the cob walls in the shape of a strip. According to the method, not only is sediment effectively prevented from entering a main river, but also a large amount of the blocked sediment can be locally converted into precious land resources, and the comprehensive corporate governance goals of achieving low governance cost and high economic benefit, changing harm to benefit and improving the ecology landscape of the gully are achieved.

The invention discloses a method for purifying reverse osmosis concentrated water with an active carbon-membrane separation accumulation countercurrent absorption technology. The method comprises the following steps of: extracting concentrated drain water produced in the running process of a reverse osmosis device, and adding into a membrane reactor for undergoing an adsorption reaction; dissolving powder active carbon (PAC) into the membrane reactor for continually adsorbing, wherein the adding amount of the PAC is determined according to the content of organic matters in the reverse osmosis concentrated water, and the adding amount of the PAC can be added appropriately if a treatment effect is poor; and performing aerated stirring and circulating reflux, adsorbing for 10-15 minutes, uniformly dispersing the PAC, fully mixing with reverse osmosis concentrated water, and discharging purified water with a hollow fiber membrane assembly. PAC accumulation countercurrent absorption and membrane separation are used together, so that cost is low, operation is easy and convenient, and automatic degree is high. Due to the adoption of the method for purifying reverse osmosis concentrated water, the requirements of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant are met, and the potential hazard of direct discharge on a water environment is reduced; and the method plays an important role in maintaining the balance of a water ecological system.

A water cleaning agent is prepared from aluminium polyalumiante, iron polyaluminate, polyacrylamide and fluorescent whitening agent through mixing. Its advantages are high effect, low dosage, short period and no secondary pollution.

The invention relates to an adsorption and degradation material as well as a preparation method and application thereof. The adsorption and degradation material is formed by compounding nano zero-valent iron and a Ag-MONTs material, and the Ag-MONTs material is used as a carrier. The Ag-MONTs material is prepared from the following raw materials: 1, 2, 3-trimellitic acid, 4, 4-dipyridyl and a metal salt of silver. The adsorption capacity is high, the amount of residual silver and iron in the water body is small, and secondary pollution to the water body is avoided.

The invention discloses an encrypted stream identification method and device. The method comprises the steps of obtaining a to-be-identified encrypted stream; selecting a first set number of messagesfrom the to-be-identified encrypted stream; calculating a characteristic value of a selected characteristic of at least a message head of the to-be-identified encrypted stream based on the characteristic value of the selected characteristic of at least one message head of each message in the first set number of messages; inputting the characteristic value of the selected characteristic of the at least one message head of the to-be-identified encrypted stream to a trained random forest model to obtain an identification result of the to-be-identified encrypted stream. The scheme can greatly reduce identification time and can decrease potential hazards to users.