39results about How to "The method works well" patented technology

The catalyst includes Ni as main active component; carrier SiO2 or Al2O3; and one or several selected from IA, IIA, IIIB, VIII or RE element Li, K, Mg, Y, Fe, Co and La as assistant. The preparation process includes soaking the carrier with solution containing Ni and assistant; and drying and roasting the soaked carrier. At the temperature of 650 deg.c and ammonia feeding space velocity of 12000/hr, the residual ammonia in the tail gas may be controlled below 400 ppm. Compared with available Ni-base catalyst, the present invention has ammonia discomposing temperature lowered by 150 deg.c, catalyst loading amount lowered to 1/20, greatly reduced apparatus volume, obviously reduced residual ammonia amount in tail gas, 1/3 to 1/2 lowered power consumption, and obviously lowered apparatus cost and production cost.

The invention discloses a preparation method of cherokee rose polysaccharide derivatives with an antitumor activity. The preparation method comprises the following steps: firstly smashing cherokee rose fruit, degreasing, removing oligosaccharide, lixiviating with hot water twice, then mixing extracts, filtrating, concentrating, precipitating and drying so as to obtain crude cherokee rose polysaccharide; adding diethylin ethyl amino ethyl (DEAE)-cellulose 52 to carry out static absorption for 30 minutes; washing with distilled water, filtering, and collecting filtrate so as to obtain the decolored crude cherokee rose polysaccharide; carrying out protein removal on a crude polysaccharide solution by using an enzyme method and a Sevag method; further separating the crude cherokee rose polysaccharide with the DEAE-cellulose 52, collecting, dialyzing, and freeze-drying so as to obtain cherokee rose polysaccharide; and finally, carrying out sulphating, carboxymethylation and hydrochloric acid degradation on the cherokee rose polysaccharide, and carrying out carboxymethylation on degradation products so as to obtain a plurality of cherokee rose polysaccharide derivatives. The plurality of cherokee rose polysaccharide derivatives have in vitro antitumor characteristics, and can be used for inhibiting the growth of three tumor cells, namely, ovarian cancer cells, liver cancer cells and rectal cancer cells.

The invention discloses a color migration method of color images. The color migration method is used to adjust the tone of a present color image by taking a specific color image as reference, and the tone of a processed output image is similar to that of the reference image. The color migration method comprises the steps of establishment an intermediate image, meshing and color migration. The method can be used to realize color migration between color images automatically and more effectively without manual intervention, especially a better color migration effect can be obtained under the condition that the tone of the image to be processed is greatly different from that of the reference image.

The invention discloses an evaluation method for the pantograph-catenary matching performance of a spectral cross-correlation coefficient, which is an evaluation method for the pantograph-catenary matching performance of a Pearson cross-correlation coefficient of a dynamic uplifting amount continuous spectrum of a contact net and a pantograph and aims to solve the lectotype problem of the high-speed railway contact net and pantograph. According to the method, the dynamic uplifting amount data of the pantograph-catenary operation is subjected to pre-processing to remove abnormal data so as to ensure data reliability; an auto-regression model method is adopted to construct the dynamic uplifting amount continuous spectrum of the contact net and the pantograph, and the uplifting spectrum is utilized to compare and analyze the causes resulting in pantograph-catenary matching performance difference; and the Pearson cross-correlation coefficient of the pantograph-catenary uplifting spectrum is calculated, and the indicators of the advantages and disadvantages of the pantograph-catenary matching performance are quantified so as to finally judge the advantages and disadvantages of the pantograph-catenary matching performance. Based on analysis, the method can visually compare the differences between different pantograph-catenary matching performance, finds out band frequency range resulting in bad matching performance, and quantitatively compares the pantograph-catenary matching performance. Therefore, the method provided by the invention is a new evaluation method for the high-speed railway pantograph-catenary lectotype.

The invention discloses an oil field wastewater treatment method. according to the method, after being subjected to air flotation, oilfield wastewater flows into a carbon tube micro-filtration membrane separation system; oil and suspended solids in the wastewater are adsorbed and intercepted by a carbon tube membrane during the running of the system, the system performs backwashing after running for a period of time so that the adsorbed and intercepted oil and suspended solids are discharged together with backwashing liquid; and the dialysis fluid subjected to membrane treatmend is used as produced water after treatment and rejected into the oil recovery stratum. By the method, the damage of suspended solids, oil and other substances in the re-injection water to the stratum is reduced.

The invention relates to a core confirming method for the development degree of reservoir cracks. The method comprises the following steps: 1) jointing cores; 2) summarizing and recognizing the characteristics of natural cracks; 3) performing imaging logging calibration; 4) finally confirming the natural cracks; and 5) judging the development degree of the cracks. The invention is specific to the reservoir cracks; the natural cracks are confirmed according to two data of the core and imaging logging, so that the confirmation of the natural cracks is more objective; furthermore, the splicing resetting is performed on the core fragments according to the invention, so that the quantity statistics of the natural cracks of the core can more objectively reflect the quantity of practical reservoir cracks, especially, the reservoir with abnormal development of the cracks and serious core segment; the method has a better effect; besides, the development degree of reservoir cracks confirmed according to the invention can avoid the common industrial misunderstanding that a same crack is mistakenly recorded as multiple cracks under the influence of mutual cutting of the cracks.

The invention discloses a Bayesian network high-voltage switch cabinet health system evaluation method based on multi-scale permutation entropy. The method comprises the steps: firstly, analyzing and fusing information of multiple physical sensors of a high-voltage switch cabinet; secondly, introducing coarse graining operation and a permutation entropy method to realize effective extraction of the feature information; and finally, constructing and training a Bayesian network model based on expert domain knowledge to realize health state evaluation of the high-voltage switch cabinet system. According to the method, data sampled by different detection means can be fused, so that accurate evaluation of the safety state of the high-voltage switch cabinet is realized, and safe and stable operation of the electric power high-voltage switch cabinet is guaranteed.

The invention belongs to the technical field of traditional Chinese medicine decoction piece processing, and particularly relates to a method for processing brewing exocarpium pieces. The method comprise the following steps: cleaning, performing ultraviolet radiation, performing quick-freezing and unfreezing, performing microwave drying, performing moistening and shaping, slicing, drying, packaging and performing preservation. According to the method for processing the brewing exocarpium pieces, due to ultraviolet radiation, effective components of the exocarpium pieces, such as flavonoids, can be increased; due to the modes of quick-freezing and unfreezing, loss of effective components can be reduced, cracking of cell walls of fresh exocarpium can be promoted, the dissolution degrees of the effective components in water can be increased, the microwave drying speed is rapid, a good thermal effect can be achieved, the activity of enzyme can be reduced, and the exocarpium pieces can be kept bright in color. The bitter taste of exocarpium can be removed, a product can be bright in color, uniform in size and good in reconstitution property, and problems that the exocarpium pieces are molded, deoiled, damaged by worms and the like when being preserved for a long time can be also solved. The product is green and pollution-free in the processing course, and market requirements can be effectively met.

The invention discloses a scale inhibition control method adopted in a circulating water operation process. According to the method, five groups of circulating water scaling judgment formulae are proposed, and compared with the prior art, the circulating water scaling tendency can be judged more accurately and the effect is better when the method is implemented by a circulating water system adopting urban recycled water and various kinds of waste water as circulating water supplement water; according to the method, phenolphthalein alkalinity and conductivity of the circulating water are further taken as circulating water control indexes, the defects of the prior art are overcome, and the circulating water is prevented from scaling more accurately and more effectively; circulating water limiting concentration ratio, circulating water limiting hardness, circulating water limiting calcium ions, circulating water limiting phenolphthalein alkalinity, circulating water limiting methyl orange alkalinity, circulating water limiting pH value and circulating water limiting conductivity acquired through tests are taken as upper limit of in-site actual circulating water control indexes, errors caused by single chloridion control are eliminated, safe operation of the circulating water system is realized, and the problem of standard exceeding of the concentration ratio or scaling is solved.

The invention discloses a vertical stereoscopic drainage device for sludge blowing and filling type reinforcement and a using method. The vertical stereoscopic drainage device for sludge blowing and filling type reinforcement comprises filter membranes, polyvinyl chloride (PVC) pipes and cross joints. The vertical stereoscopic drainage device for sludge blowing and filling type reinforcement is characterized in that holes are formed in the PVC pipes, the PVC pipes are sleeved with the filter membranes, the corresponding PVC pipes sleeved with the corresponding filter membranes are connected to reach the required design length through upper main connectors and lower main connectors of the cross joints, and left branched connectors and right branched connectors of the cross joints are also connected with the corresponding PVC pipes sleeved with the corresponding filter membranes. The vertical stereoscopic drainage device for sludge blowing and filling type reinforcement and the using method have the advantages that (1) a vacuum load is effectively transmitted into a sludge layer, the drainage distance is further shortened, solidification of a soil body is accelerated, and the construction period is effectively shortened; (2) the way that a drainage plate is erected manually is adopted, a sand cushion does not need to be laid in advance, and particularly in areas lacking of sand sources, the effect of the method is extremely good; and (3) the vertical drainage device can be used repeatedly, and thus the cost is reduced.

A hidden attack detection method based on a multi-scale sample entropy and a Bayesian network adopts the technical scheme that 1, information of a plurality of physical sensors of a networked motion control system is analyzed, so that the effect of the provided method is better than that of a method based on a single sensor; 2, from the perspective of data driving, sensor information existing in a networked motion control system is fully utilized, and an accurate control system model is not depended on; and 3, through simple coarse graining operation, more information is obtained with low calculation cost, and certain detection performance is improved while the real-time performance of the networked motion control system is met. And 4, the Bayesian network is combined with certain priori knowledge, has better generalization ability, is extremely high in calculation efficiency, and is a detection method very suitable for a networked motion control system.

The invention discloses an MIMO radar DOA estimation method based on a low-altitude multipath condition, and belongs to the technical field of array signal processing. According to the method, firstly, the influence of reflected signals is considered, and a four-path echo signal model is introduced; and then a received signal is smoothed by using a bidirectional spatial smoothing algorithm to reduce the influence of the multipath signal; finally, a real number field generalized MUSIC algorithm and a multipath attenuation coefficient and generalized MUSIC joint estimation algorithm are theoretically analyzed, and then two spectral peak search forms are analyzed; the main difference is that a large spectral peak value generated by a zero angle is suppressed by using a limit criterion, so that the influence of a pseudo spectral peak is reduced, and the estimation performance under the low-altitude condition is improved. On the basis, a more reasonable weighting mode is used for improvingan original spectral peak searching mode, and experiments prove that when compared with an existing method, the method of the invention is higher in estimation success probability and better in performance.

The invention relates to a method for preventing saline-alkali soil salt return by utilizing a salt isolation layer. The method includes the steps of ploughing a saline-alkali soil layer with the thickness of 50-70cm, and removing ploughed soil; laying an iron tailing layer with the thickness of 5-10 cm; laying a straw layer with the thickness of 15-20 cm; laying a charcoal layer with the thickness of 4-8 cm; and conducting saline-alkali soil backfill. According to the method for preventing saline-alkali soil salt return by utilizing the salt isolation layer, the gathering speed of bottom salt on an earth surface can be reduced, and the effect of inhibiting soil salt return is achieved; the pH and the salt content of surface soil can be effectively reduced, the content of organic matters in the soil is increased, and a proper soil environment can be provided for plant growth; the salt isolation layer prepared from two solid wastes and biochar can achieve the effect of inhibiting soil salt return, turns waste into wealth, and improves the economic, social and environmental benefits; and the method has the characteristics of strong operability, good effect, high benefit and capability of being popularized and used in a large scale.

The invention discloses an indoor moving target positioning method. The method comprises the following steps: establishing a state equation and an observation model of unknown moving target node motion; according to the state equation, obtaining a one-step predicted value and a covariance matrix of a system state quantity through a group of Sigma point sets calculated by UT and corresponding weights thereof, and observing the Sigma point sets; according to the observation model, calculating an observation prediction value of the observation Sigma point sets, and obtaining an observation prediction value of the system; and according to a cost function based on the maximum correlation entropy, fusing the observation predicted value of the system, obtaining an observation covariance matrix and an observation cross covariance matrix of the reconstructed observation model, determining a Kalman gain matrix, estimating the state quantity of the system, and determining the position coordinates of an unknown moving target node. According to the indoor positioning method based on the MCUKF, indoor positioning under the condition that non-Gaussian noise occurs in measurement noise can be better completed, the positioning precision is higher than that of LS, EKF and UKF indoor positioning methods, and the robustness is higher than that of the LS, EKF and UKF indoor positioning methods.

The invention provides a winter construction heating maintenance method for a base layer in a cold region. The winter construction heating maintenance method is characterized by comprising the following steps: S1, calculating a heat loss value; s2, splicing a three-order Hilbert unit tube; s3, base layer film covering, wherein after the to-be-heated and cured base layer is rolled, the surface of the to-be-heated and cured base layer is immediately covered with a layer of film; s4, a water circulation layer is laid, specifically, a plurality of third-order Hilbert unit pipes obtained in the step S2 and passing the heat preservation test are further assembled on the thin film to form the water circulation layer, and then water is added into the water circulation layer for a closed water test; s5, covering a top thermal insulation layer; after the closed water test is qualified, the water circulation layer is covered with a heat preservation layer, and the covering thickness is not smaller than the thickness of the heat preservation layer in the step S1; s6, heating equipment is installed; and S7, heating maintenance monitoring. The problem of maintenance of the base layer in the cold environment is solved, the maintenance effect is good, the strength of the base layer can be naturally increased to reach the set strength, and therefore the construction quality of the base layer can be improved.