376results about How to "Achieve decomposition" patented technology

The invention relates to a method for preparing hydrogen through photoanode-photovoltaic battery coupled dual-illumination fully-photic-driven decomposition of water. Efficient decomposition of water is realized under sunlight illumination conditions by using coupling of a photoelectrocatalysis technology with a photovoltaic battery technology, adopting a water oxidation cocatalsyt modified semiconductor material as a photoanode, placing a proton reduction cocatalyst modified Si battery in an electrolyte as a photocathode, directly connecting the positive electrode of the Si battery with the anode through a lead and allowing the surface of the cathode to contact with the electrolyte. The method realizes fully photic driven decomposition of water without applied bias conditions, and the solar energy utilization efficiency STH of the method reaches 2.2% or above.

The invention belongs to the technical field of water processing, and in particular relates to a method for purifying oil-containing waste water of catering and complete equipment thereof. The methodcomprises the following steps: mechanical-type oil-dirt separation, coagulation treatment of suspended substances, air floatation biochemical treatment, and biological filtration and sterilization. Compared with the prior art, the method of the invention has the characteristics of high removal efficiency, simple equipment, low running cost, convenient operation, management and maintenance, and caneffectively remove large amount of organic substances and grease in the waste water, the mmonian and chroma of the waste water, and the like, and enables every outlet water index to satisfy the requirement of recycle water.

The invention discloses a face image super-resolution reconstruction method based on morphological component analysis. The method comprises the following steps: upsampling a low-resolution input image to acquire an interpolated image; acquiring a whole high-resolution face image from the interpolated image by a morphological component analysis method; downsampling the whole high-resolution face image and subtracting the whole high-resolution face image from the low-resolution input image to acquire a low-resolution residual image, and performing face detail information compensation by performing neighboring construction on an image block at each face position to acquire a high-resolution residual image; and combining the high-resolution residual image with the whole high-resolution face image to acquire the face image super-resolution result and finish resolution reconstruction. The invention also provides a method for performing face image super-resolution reconstruction and expression normalization simultaneously on the basis of morphological component analysis. By the method, detailed face detail information can be acquired, the ringing phenomenon is eliminated and high image quality is achieved.

The invention relates to a full-automatic size edge sealing production line and a production method. A glass carrying device is arranged in a sheet discharge table; the conveying device is an open conveying mechanism, and a photoelectric thickness measurement device is arranged in a transition section or a sheet feeding table; two synchronous belt conveying mechanisms in the open conveying mechanism are arranged in parallel at interval, wherein one is an adjustable synchronous belt conveying mechanism, the other one is a fixed synchronous belt conveying mechanism, the distance between the adjustable synchronous belt conveying mechanism and the fixed synchronous belt conveying mechanism is automatically adjusted through a distance adjusting mechanism, and two synchronous belts in the adjustable synchronous belt conveying mechanism and the fixed synchronous belt conveying mechanism are driven to rotate by a servo driven synchronous transmission mechanism; and the glue driving head is provided with an electric cleaning head, the electric cleaning head vertically ascends and descends through a pneumatic lifting mechanism, and the pneumatic lifting mechanism is connected with a pneumatic horizontal driving mechanism and driven by the pneumatic horizontal driving mechanism to move horizontally.

The invention relates to a nut placing and tightening device, method and system. The nut placing and tightening device comprises a connecting rod mechanism for transferring torque, a stretching mechanism and a gear mechanism for clamping a nut. The gear mechanism is hinged to one end of the connecting rod mechanism, the stretching mechanism is connected with the connecting rod mechanism and the gear mechanism, and the gear mechanism can be unfolded or folded relative to the connecting rod mechanism through the stretching mechanism. The connecting rod mechanism comprises a connecting rod which can be rigidly connected with or disconnected from the gear mechanism. In the state that the connecting rod is disconnected from the gear mechanism, the gear mechanism can be unfolded or folded relative to the connecting rod mechanism through the stretching mechanism. In the state that the gear mechanism is folded in place relative to the connecting rod mechanism, the connecting rod can be rigidly connected with the gear mechanism. Through the nut placing and tightening device, method and system, the nut can be tightened and dismounted in a narrow and long cavity in a steering mode; besides, length adjustment can be conducted according to needs, and thus the effective operation distance is extended.

The invention discloses a heavy-duty tool thermal deformation prediction method taking environmental temperature into account. The method specifically comprises the following steps of predicting the tool thermal deformation caused by the internal heat source of a tool, predicting tool thermal deformation caused by the external heat source of the tool, summing the tool thermal deformation caused by the internal and external heat sources to obtain the final tool thermal deformation. Time-lag thermal deformation error caused by the environmental temperature is taken into account during the prediction of the tool thermal deformation caused by the external heat source of the tool, and multiple regression modelling based on the least square method principle is performed during the prediction of the tool thermal deformation caused by the internal heat source of the tool. The joint action effects reflecting the influence of the environment temperature nonlinear lag and the influence of the internal heat source on the heavy-duty tool are combined by the method, and the thermal deformation error under any environmental condition and processing condition can be effectively predicted in real time.

The invention discloses a low-dosage CT image decomposition method based on three-dimensional distinctive feature representation. The method comprises steps of: scanning a phantom to acquire a group of corresponding low-dosage and normal-dosage phantom CT images; selecting a feature block in the normal-dosage phantom CT image to form a feature dictionary, performing subtraction on the low-dosage and normal-dosage phantom CT images so as to obtain a low-dosage noise pseudo shadow image, and selecting a feature block in the noise pseudo shadow image to form a noise pseudo shadow dictionary; and representing a clinic low-dosage CT image by using a three-dimensional distinctive dictionary formed by the feature dictionary and the noise pseudo shadow dictionary in order to obtain a feature image represented by the feature dictionary and a noise pseudo shadow image represented by the noise pseudo shadow dictionary, thereby achieving decomposition of the low-dosage CT image. The method may effectively separate noise and strip-shaped pseudo shadow from feature structure components in the low-dosage CT image, satisfies a quality requirement of clinic analysis and diagnosis, and improves the use efficiency of the low-dosage CT image.

The invention provides a triaxial test device for in-situ generation and decomposition of a natural gas hydrate. The device comprises a closed pressure chamber consisting of an outer cover barrel and a base; an inner cover barrel is arranged in the closed pressure chamber; the inner cover barrel is fixed on the base through a clamping ring; at least one oil inlet and outlet hole, at least one airinlet hole and at least one water inlet hole are formed on the base of the inner cover barrel; the oil inlet and outlet hole, the air inlet hole and the water inlet hole are formed on the inner cavity of the inner cover barrel; pistons are arranged on the tops of the outer cover barrel and the inner cover barrel; air exhaust holes are formed on the pistons; a lower pressure pad and an upper pressure pad which correspond to each other are arranged in the inner cavity of the inner cover barrel; the upper pressure pad corresponds to the positions of the pistons; and the lower pressure pad is fixed on the base.

The invention discloses a preparation method of a metal organic framework material and application of the metal organic framework material in a cyclohexyl hydroperoxide decomposition reaction. Transition metal salt and terephthalic acid or a derivative thereof are subjected to a hydrothermal synthesis reaction in a sodium acetate solution to obtain the metal organic framework material, then the metal organic framework material serving as a catalyst is added into industrial cyclohexane uncatalysed oxidation liquid, the temperature is controlled to be 50-150 DEG C, the time is controlled to be 0.1-5 h, cyclohexyl hydroperoxide decomposition is carried out to obtain hexamethylene and cyclohexanone, the conversion rate of cyclohexyl hydroperoxide is larger than 95%, and the selectivity of alcohol ketone reaches up to 100%; the activity of the repeatedly-recycled catalyst is kept unchanged basically. Compared with other catalysts containing metal active components, the catalyst is high in catalytic efficiency, recyclable and stable in reusability; when the catalyst is applied to the cyclohexyl hydroperoxide decomposition reaction, the decomposition process is conducted under the alkali-free condition, the catalytic efficiency is very high, and pollution caused by waste alkali liquor to the environment is avoided.

The invention discloses a residence community domestic garbage treating system. The system comprises a garbage burning system, a garbage decomposing system and a garbage decomposition liquid ecological using system, wherein the garbage burning system comprises a burnable garbage throwing pool, a crushing and drying box and a burning and drying device; and the domestic garbage decomposing system comprises a decomposable garbage throwing pool, a spiral propelling crusher, a primary decomposing pool, a gas-liquid guide pipe, a scum recovering pool, a U-shaped secondary scum recovering pipe, a fermentation sediment recovering pool and a secondary decomposing pool. The three systems interact with one another to burn the garbage without smoke and decompose the garbage without pollution, and decomposition liquid also can be used for growing plants at building roofs, balconies and public lawns, so that the indoor temperature and outdoor light pollution are reduced, and the content of nutrients in domestic sewage is lowered.

The invention provides a security strategy decomposition and verification system in a cloud storage environment. The system comprises a database, a strategy decomposition and verification module, a strategy evaluation module, a resource and access control strategy adjusting module, a sensitive information filtering word stock management module and an auditing module, wherein the strategy decomposition and verification module comprises a resource strategy decomposition and verification module and a coordination strategy decomposition and verification module; the coordination strategy decomposition and verification module comprises a coordination strategy decomposition and verification module and a coordination strategy decomposition and optimization module; and the resource and access control strategy adjusting module comprises a resource adjusting module and an access control strategy adjusting module. The system performs decomposition and verification on a security strategy in the cloud storage environment, so that the strategy and resources controlled by the strategy can be stored at a cloud terminal at the same time, and simultaneously, the system ensures that sensitive information in an access control strategy of a service party participating in coordination is not leaked. The system has the characteristics of high security, high execution efficiency and high expansibility.

The invention provides a functional graphene loaded gold palladium nano-catalyst as well as preparation and application thereof. A one-step fast reduction method is used; a functional graphene loadedgold palladium nano-catalyst is fast synthesized at room temperature; the advantages that the synthesis time is short, the operation is simple and convenient, and the like are realized; the dispersionperformance of gold palladium nanometer particles on graphene carriers (NH2-N-rGO) modified by -NH2-N is obviously improved; the particle dimension (0.3 to 2.8nm) of metal NPs is effectively reduced;the synthesized AuPd / NH2-N-rGO catalyst is used for catalyzing methanoic acid water solution for room temperature decomposition for hydrogen preparation. The catalyst still has high catalysis activity under the condition of no additive existence; the conversion rate is 100 percent; the hydrogen selectivity is 100 percent; the circulation stability is high; the catalysis activity is high.

The invention discloses a logistics service system, a path analysis method and a logistics distribution method. A data interface module can access a database to obtain logistics data, and calculate the logistics data to form display data; the database can obtain logistics information on the World Wide Web by accessing the World Wide Web, then converts the logistics information into logistics dataand stores the logistics data; a transportation capacity algorithm module can access the data interface module to obtain the display data, and the transportation capacity algorithm module calculates and analyzes the display data to form a path scheme; and the data interface module can further access the transportation capacity algorithm module to obtain a path scheme having at least one path plan.The logistics service system, the path analysis method and the logistics distribution method have the advantages and beneficial effects of having excellent expansibility, excellent adaptability and wide application range, ensuring data independence and security, improving the reliability of a carriage path, providing great convenience to customers, further providing a good transportation capacityinformation display platform for carriers, and greatly enhancing the fairness and transparency of the logistics industry.

The invention discloses an alkalescent diatom ooze wall material and a preparation method thereof. The wall material comprises, by weight, 300 parts to 600 parts of diatom ooze of 200 meshes to 400 meshes, 200 parts to 500 parts of silica flour of 100 meshes to 200 meshes, 100 parts to 400 parts of wollastonite powder of 200 meshes to 400 meshes, 100 parts to 400 parts of bentonite of 200 meshes to 400 meshes, 200 parts to 500 parts of objective palygorskite of 200 meshes to 400 meshes, 20 parts to 50 parts of plant cellulose and 10 parts to 40 parts of nano polymers. The alkalescent diatom ooze wall material has weak alkalescent corrosion and a porous optical channel structure, the specific gravity of the material is smaller than that of water, the material is easy to suspend on the water surface, rays can be refracted inside the wall material, and the ray utilization rate is high. The invention further provides a preparation method of the alkalescent diatom ooze wall material, as the wallmaterial is alkalescent, and the stirring and blending is easy, the preparation method is simple.

The invention discloses a garbage thermal cracking treatment technology which comprises the following steps: (1) coarse crushing; (2) magnetic separation; (3) sieving; (4) fine crushing; (5) drying; (6) thermal pretreatment; (7) high temperature cracking. The garbage thermal cracking treatment technology disclosed by the invention is reasonable in design of working procedures and simple in structure, and can be used for effectively treating city household garbage and solving the problem of environmental pollution caused by the city household garbage; products, such as coke coal, tar and combustible gas, obtained from city household garbage treatment, can be collected and recycled; the garbage thermal cracking treatment technology creates new economic benefits, fully meets the requirements on reutilization, harmless treatment and reduction of garbage, and realizes zero release of garbage treatment and maximum benefit of reutilization of garbage treatment products.

The invention relates to a circulator. The circulator comprises a shell body and a transmission device, wherein the transmission device is mounted on the shell body, a rotary wheel is mounted on the transmission device, a plurality of vanes are arranged on the periphery of the rotary wheel, the rotary wheel is arranged in the shell body, a circulation cavity is formed in the inner wall of the shell body at the periphery of the rotary wheel, a circulation cavity port A is formed in one end of the circulation cavity, a circulation cavity port B is formed in the other end of the circulation cavity, and an isolating body is arranged on the inner wall of the shell body between the circulation cavity port A and the circulation cavity port B. According to the circulator provided by the invention, circular motion and fluid motion are used sufficiently; torsion is better converted into pressure through fluid; pressure is better converted into torsion through the fluid; and the fluid separation is realized by using vortex. The circulator provided by the invention can serve as a water pump, a slurry pump, a sewage pump, a blower, a compressor, spray equipment, a reactor, a steam turbine, vacuum equipment or a separator and be applied to wastewater treatment, seawater desalination, marine chemical engineering, mineral processing, waste disposal, hydrogen production, carbon dioxide decomposition, harmful gas decomposition, air purification, dedusting, dust absorption, refrigeration, oxygen production, oil refining and the like; and the blue sky and water can be completely realized, and foamed materials can be produced so as to bring a material revolution.

The invention discloses an indoor air purifying method and an indoor air purifying device. A primary strainer, a barbed nail corona discharging electrode, a mesh grounding electrode, a filling layer and a mesh charging electrode, wherein the filling layer is filled with high-power medium particles; the mesh charging electrode is arranged at the rear end of the filling layer; the mesh grounding electrode is arranged at the front end of the filling layer; the mesh charging electrode is in external connection with a high-voltage pulse electrostatic generator through an insulated conductor; the mesh grounding electrode is in external connection with the ground through an insulated conductor; the outer wall of the primary strainer clings to the inner wall of an absorbing barrel; and the barbed nail corona discharging electrode is arranged in space between the primary strainer and the mesh grounding electrode and is connected with the high-voltage electrostatic generator positioned outside the absorbing barrel. Dusty airflow and high-power medium balls are respectively treated by a corona discharging method and a pulse corona discharging method, and bacteria are effectively killed by streamer corona generated on surfaces of the medium balls while the particles are absorbed by the streamer corona.

The invention discloses a method for decomposing and synthesizing a three-frequency range CDMA (Code Division Multiple Access) signal. When the three-frequency range CDMA signal is decomposed, the common port of a first T-shaped joint receives the three-frequency range CDMA signal, a high-band filter and a low-band filter at both ends of the T-shaped joint separate a high-frequency range signal and a synthesis signal of two remained frequency range signals, the synthesis signal is accessed into the common port of a second T-shaped joint, and a high-band filter and a low-band filter at both ends of the second T-shaped joint separate a medium-frequency range signal and a low-frequency range signal in the synthesis signal. When the three-frequency range CDMA is synthesized, the three frequency range signals are transmitted on the two T-shaped joints in the reverse direction, thereby obtaining the three-frequency range CDMA signal. The invention also discloses a decomposing and synthesizing router and a terminal for decomposing and synthesizing the three-frequency range CDMA signal, thereby decomposing and synthesizing the three-frequency range CDMA signal through the simple structure.

The invention provides an automatic car coupler control system and the application of the automatic car coupler control system. The automatic car coupler control system comprises a main air pipeline, an uncoupling pipeline, an MRP main air valve, a UC uncoupling air valve, an electric coupler pushing air cylinder, an uncoupling air cylinder, a pneumatic control valve and a manual control electromagnetic valve. An air inlet of the pneumatic control valve is communicated with the main air pipeline. The auxiliary control end of the pneumatic control valve is communicated with the left end of the MRP main air valve. Two work ports of the pneumatic control valve are communicated with a front port and a rear port of the electric coupler pushing air cylinder respectively. The master control end of the pneumatic control valve is communicated with the uncoupling pipeline. The right end of the MRP main air valve is communicated with the main air pipeline. The UC uncoupling air valve is communicated with the uncoupling pipeline. The uncoupling air cylinder is communicated with the uncoupling pipeline. The uncoupling pipeline is communicated with an air outlet of the manual control electromagnetic valve. An air inlet of the manual control electromagnetic valve is communicated with the main air pipeline. According to the automatic car coupler control system and the application of the automatic car coupler control system, a car coupler can be automatically controlled through the simple structure and the assembling difficulty and the maintenance difficulty are reduced.

The invention discloses a polar coordinate sampling-based cross transfer function quick decomposition method. The method comprises the following steps of 1) obtaining optical parameters of an imagingsystem; 2) obtaining coordinates (ri, theta j) of sampling points on a spatial domain by adopting a polar coordinate sampling method; 3) calculating light source mutual intensity functions, defined inthe specification, and pupil functions, defined in the specification, corresponding to the sampling points through non-uniform inverse Fourier transform; 4) calculating a cross transfer function value, defined in the specification, of the spatial domain corresponding to the sampling points, and establishing a sampling matrix defined in the specification; 5) establishing a group of orthogonal basis functions defined in the specification, calculating function values, defined in the specification, of the orthogonal basis functions in corresponding polar coordinate sampling positions, and establishing a matrix Q=[q1, q2, ...qk]; 6) performing QR matrix decomposition, defined in the specification, on the matrix Q; 7) calculating a projection matrix and performing singular value decomposition on the projection matrix P to obtain P=UU*; 8) obtaining a kernel function, defined in the specification, of the cross transfer function, defined in the specification, on the spatial domain. Quick analysis can be performed to obtain the TCC kernel function, so that light intensity distribution calculation is quick and efficient, and actual photoetching process design demands are met.

The invention provides a catalyst for decomposing formaldehyde and a preparation method of the catalyst. According to the catalyst for decomposing formaldehyde, a carrier of the catalyst is activatedcarbon, and the active components of the catalyst are platinum and palladium loaded on the carrier; the catalyst further contains a hydrophobic component which is a hydrophobic porous material layer packaging the surface of the catalyst, wherein the loading capacity of platinum is 0.02wt%-0.3wt%, and the loading capacity of palladium is 0.02wt%-0.3wt%. The preparation method of the catalyst is simple; and the prepared catalyst has the advantages of low cost, high wet fastness, adsorbability and activity and long service life, is capable of adsorbing and decomposing formaldehyde gas at the roomtemperature and can be applied to air purifiers and adsorption concentration towers, and formaldehyde concentration can be remarkably and rapidly reduced.

The invention discloses a polylactic acid (PLA) composite material with a high degradation speed and a preparation method of the composite material. The composite material provided by the invention isprepared by adopting polylactic acid resin, PBAT resin, an inorganic filler, modified starch, an organic nucleating agent, a coupling agent, a chain extender, a compound photosensitive initiator, a thermal oxygen degradation initiator and a food-grade plasticizer, the heat resistance of the polylactic acid material is improved, and the use range of polylactic acid products is expanded; thermal degradation, photodegradation and hydrolysis speeds of wasted PLA products are increased, harsh conditions that require industrial composting are avoided, and the degradation speed faster than that of ordinary polylactic acid can be realized under natural conditions; the auxiliary agents used in the method are all food-grade raw materials and can be applied to food packaging; and the preparation method of the polylactic acid composite material with the high degradation speed provided by the invention employs simple equipment and is low in investment.

The invention specifically relates to a preparation method for nanometer silicon powder, belonging to the technical field of material chemistry. The preparation method comprises the following steps: (1) introducing silane into a plasma generator and carrying out ionization decomposition and re-nucleation so as to obtain nanometer silicon particles; and (2) subjecting the nanometer silicon particles to gas-solid separation and cooling so as to obtain the nanometer silicon powder, wherein the above steps are carried out in a nitrogen environment. The preparation method provided by the inventionis simple in process, good in product quality and low in production cost.

The invention relates to a composite unit of an automobile exhaust catalytic reduction postprocessor. The composite unit is characterized in that: ceramic coatings are coated on the inner wall and the outer wall of the composite unit, and nano-scale TiO2 granules are uniformly and densely distributed on the surface layer of the composite unit; and the catalytic reduction postprocessor is a square box, ceramic coatings are coated on the inner sides of a cavity partition plate and an end plugging plate of the catalytic reduction postprocessor, and nano-scale TiO2 granules are uniformly and densely distributed on the surface layer of the catalytic reduction postprocessor. The structure of the catalytic reduction postprocessor applied on a commercial automobile, the structural parameters are optimized, the effect of the urea mixing unit is improved, the ceramic coatings are increased, and the nano-scale TiO2 granule uniformly and densely distributed on the surface layer strengthen the urea decomposition function and have de-noising effect, certain heat insulation effect and high practical value.

The invention relates to a light quantum oily fume purifier, comprising a shell (1) and a fan (2) for generating suction force, wherein the shell (1) is provided with an air inlet (3) and an air outlet (4); and the fan (2) is arranged on the air outlet (4). The light quantum oily fume purifier is characterized in that the air inlet (3) is provided with an oil blocking plate (5) the upper part of which is provided with a flow guiding cover (6); the shell (1) is internally provided with a light quantum luminous tube (7); a titanium dioxide coating is arranged on the inner wall of the shell (1); the titanium dioxide coating is arranged on one surface or two surfaces of the flow guiding cover (6); a gas inlet of the fan (2) is communicated with the inner cavity of the shell (1); and the gas discharging port of the fan (2) is provided with a porous plate (7) which is coated with a catalyst layer for quenching ozone. The light quantum oily fume purifier has the characteristics of being good in oil removing effect and environmentally-friendly.

The invention relates to a plasma-catalytic oxidation refuse burnt and cracked tail gas purification device comprising a set of plasma-catalytic oxidation and purification device arranged in the tail gas discharging position of a refuse burning furnace or a refuse cracking furnace. The plasma-catalytic oxidation and purification device is characterized in that a tank body of the plasma-catalytic oxidation and purification device is connected with an air outlet of the burning furnace or the cracking furnace through a pipeline and a reducer. Harmless tail gas treated by the purification device is discharged after achieving standards; the front stage in the tank body is provided with a discharge toothed plate and a dust connecting plate which form a plasma electric field, and two electrodes of the plasma electric field are connected with a strong-pulse plasma power supply; and the back stage in the tank body is provided with a catalyst assembly, an oxidant assembly and a catalytic oxidation device shell which form a catalytic oxidation device. The tail gas purification device has the obvious effect of purifying the burnt tail gas and fundamentally eliminates secondary pollution generated in the thermal treatment process of house refuses.

The invention discloses a water-permeable brick for a pavement. The water-permeable brick for the pavement comprises a brick body (1) laid on the pavement, a through hole (2) is formed in the brick body (1) in the height direction, a filtering device (3) is arranged in the through hole (2) and is filled with filtering filler containing a microbial agent, and the microbial agent comprises bacillus subtilis, rhodop seudanonas palustris, bacillus lincheniformis and lactobacillus plantarum. When surface water flows into the through hole (2), the microbial agent contained in the filtering filler can degrade nitrogen, phosphorus and organic matters in the surface water, a peculiar smell is avoided, pollution to underground water is reduced, the water quality of the underground water is improved, and the water-permeable brick can be used for building sponge cities.

The embodiment of the invention provides a data noise reduction method and system for bridge structure monitoring. The method comprises the following steps: acquiring an original observation signal; performing pole symmetry modal decomposition on the original observation signal to obtain a decomposed intrinsic mode component and a residual component; separating the decomposed intrinsic mode component and the residual component by adopting a blind source separation algorithm to obtain a separation signal; performing frequency domain conversion on the separation signal to obtain a frequency domain conversion result, and obtaining a noise component according to the noise frequency in the frequency domain conversion result; removing a noise component, and performing reverse reconstruction on the decomposed intrinsic mode component and the residual component to obtain a reconstructed signal component; calculating a Spearman coefficient for decomposing the intrinsic mode component and the original observation signal, and determining a preset threshold; and accumulating the reconstructed signal components according to a preset threshold to obtain signal data without noise information. According to the embodiment of the invention, modal decomposition and blind source separation are combined, and decomposition, denoising and reconstruction of the bridge monitoring data are effectively realized.

The invention discloses a method for determining seawater depth by decomposing a laser radar waveform based on an LM algorithm. The method mainly comprises the steps of conducting echo waveform decomposition operation after obtaining an echo waveform, that is, firstly, conducting noise reduction and smoothing processing on the waveform; then, setting initial wave parameters according to the echo waveform; next, adjusting the parameters during each time of iteration through LM algorithm fitting, and when iterative computation matches conditions and finishes, solving an optimal parameter; finally, decomposing the echo waveform into a sea surface waveform and a sea bottom waveform, and further solving the seawater depth. According to the method for determining the seawater depth by decomposing the laser radar waveform based on the LM algorithm, the optimal parameter can be obtained, decomposition of the sea surface waveform and the sea bottom waveform is achieved, and complexity of the algorithm is sharply reduced. On the condition that a sea surface echo is very close to a sea bottom echo, the sea surface waveform and the sea bottom waveform can still be decomposed.

The invention discloses a druss, a preparation method and preparation equipment thereof. The preparation method of the druss comprises the steps of (A) making carbonaceous material contact with high temperature plasma for fragmentation reaction under the temperature of 1400-1800 DEG C to obtain fragmented products with rich acetylene, (B) conducting acetylene decomposition reaction of the obtained fragmented products to obtain the druss. The druss preparation method can achieve the production of druss by using at least one of coal, fuel oil and natural gas as a carbonaceous material. The druss preparation method simplifies the steps of acetylene purification, shortens the druss production process, and reduces the production cost.