133results about How to "No increase in difficulty" patented technology

Disclosed is a decomposition calculating method of the optimal power flow of a power system with a unified power flow controller. The method is characterized by comprising the following steps of firstly obtaining steady-state operating parameters required by the power flow calculation of the power system; secondly, determining the mounting position and the control parameter range of the unified power flow controller; thirdly, based on network equivalence, equalizing the branches of the unified power flow controller to two PQ nodes containing control targets; fourthly, utilizing taboo research to perform multiple optimal power flow calculation to determine an active control target of the unified power flow controller; and fifthly, calculating the control parameters according to the obtained control target of the unified power flow controller and the operation state of the system. The decomposition calculating method of the optimal power flow system with the unified power flow controller can equivalently decompose the optimal power flow calculation problem of the power system with the unified power flow controller into a two-layer optimization problem through network, can perform the optimal power flow calculation of the power system more effectively and more reliably, and has engineering use value.

The invention relates to a rapid superjunction longitudinal double-diffusion metal oxide semiconductor transistor which comprises a cell area, a terminal area and a transition area, wherein the terminal area is arranged at the outermost periphery of a chip; the transition area is positioned between the cell area and the terminal area; the bottoms of the cell area, the transition area and the terminal area (III) are provided with drain electrode metal; a heavy doping n-type silicon substrate is arranged on the drain electrode metal and used as a drain area of the chip; an n-type doping epitaxial layer is arranged on the heavy doping n-type silicon substrate; and a discontinuous p-type doping columnar semiconductor area is arranged in the n-type doping epitaxial layer. The rapid superjunction longitudinal double-diffusion metal oxide semiconductor transistor is characterized in that an n-type heavy doping semiconductor area is arranged in a second p-type doping semiconductor area in the transition area, and the surface of the n-type heavy doping semiconductor area is provided with a contact hole which is connected with a metal layer to form a ground contact electrode of the chip. The invention can effectively reduce the reverse recovery charge of a device and improve the reverse recovery characteristics under the conditions of not increasing the process cost or changing the main parameter of the device.

The invention discloses a long-acting melt-blown polypropylene composite electret material for mask melt-blown cloth and a preparation method of the long-acting melt-blown polypropylene composite electret material. The long-acting melt-blown polypropylene composite electret material comprises the following components in parts by weight: 100 parts of polypropylene resin, 0.1 to 10 parts of a fluorosilicone polymer, 0.01 to 2 parts of an inorganic charge enhancer, 0.1 to 2 parts of a lubricant, and 0.01 to 0.3 part of an antioxidant, wherein the fluorosilicone polymer is fluorine-containing polysiloxane taking a silicon-oxygen bond as a main chain and fluoroalkyl as a side chain. In the long-acting melt-blown polypropylene composite electret material for mask melt-blown cloth, a silicon-oxygen main chain of the fluorosilicone polymer is smooth, increase of the charge injection depth can be facilitated, a fluoroalkyl side chain promotes charge capture, meanwhile, dipole directional arrangement is generated, a main chain can be masked, a cloth cover is endowed with good hydrophobicity, the material has a good electret effect, and the long-term effect of the material is effectively improved. Moreover, the fluorosilicone polymer is low in melting point and is uniformly dispersed, so that the melt-blown polypropylene composite electret material is relatively simple to process and form.

The invention relates to a super junction high-voltage power device structure. A power semiconductor device many be influenced by a junction curvature effect to cause aggregation of an electric field close to a junction, so that a device is extremely easy to break down; and thus, the voltage withstanding degree of the device is required to be improved. The super junction high-voltage power device structure comprises an active region and a terminal region, wherein an epitaxial layer of a first conduction type material is arranged on a substrate layer; a composite buffer layer is formed on the epitaxial layer and comprises first semiconductor regions constituted by the first conduction type material and second semiconductor regions constituted by a second conduction type material, and the second semiconductor regions and the first semiconductor regions are arranged alternately; a well region of a second conduction type is positioned on the surface of the second semiconductor region, and is between two first semiconductor regions or between the final first semiconductor region and a cut-off ring. According to the super junction high-voltage power device structure, the withstanding voltage and the reliability of the terminal of the super junction device can be improved, so that withstanding voltage close to that of a cell region can be born by the terminal; and the structure can be realized by using the conventional super junction semiconductor manufacturing process without increasing the difficulty and the production cost of the process.

The invention relates to a module possessing a light conversion function. An organic silicone rubber is taken as a carrier. An LED phosphor and an organic light diffuser agent are added to form the light conversion module. The module is soft and elastic. A preparation method is characterized by: mixing organic silicon glue, the LED phosphor and the organic light diffuser agent uniformity; injecting into a mould, heating, curing and molding. The module can be used in a blue ray LED light source. The LED phosphor can be excited to glow by the blue ray emitted by the blue ray LED light source, and through reflection, refraction and scattering effects of the organic light diffuser agent, the light of the LED phosphor and the blue ray which is not be absorbed are composited into the white light or the light with other colors. The light color and intensity of the obtained compound light distribute uniformly, and are soft without glare. The compound light can realize the wide-angle light and can be applied in LEC illumination and decorative lamps.

The invention discloses a catadioptric type off-axis three-reflector long-wave infrared optical system for spaceborne or airborne ground observation. The optical system comprises an off-axis three-reflector system and a convertible lens group 4, wherein the off-axis three-reflector system comprises a concave reflector 1, a convex reflector 2 and a concave reflector 3; the three off-axis reflectorscan perfectly image, and the focus of each reflector is longer than the focus of the system; the convertible lens group is achromatic, and the amplification factor beta of the convertible lens groupis larger than or equal to 0.35 and less than or equal to 1; the focus of each of the three off-axis reflectors is shortened; and the relative aperture of the system is enlarged. The invention has simple structure and is mainly applied to long-wave infrared cameras in airborne or spaceborne ground imaging instruments.

The invention discloses a method and device for eliminating mutual inductance coupling electromagnetic interference; the method of the invention comprises the steps that: after a current signal on the power line of a strong current interference source system is detected and converted into a voltage signal, amplitude amplification is carried out to the normal phase or the reversed phase of the measuring conversion voltage signal and the voltage signal is converted into an output current signal, the value of which is not affected by the load; then the output current signal is converted into an offsetting signal which is equal to an interfering signal in amplitude and contrary to the interfering signal in phase; and the offsetting signal is injected into the loop of a weak current device to offset the interfering voltage inducted by the strong current interference source system to the loop of the weak current device by inductance coupling. The method of the invention dexterously brings in a voltage / current switching circuit, thereby overcoming the influence of the loop impedance of the weak current device on the offsetting effects and enlarging the application scope of the mutual inductance coupling offsetting method. The method and the device of the invention has low power consumption and cost, overcomes the defect that EMI filtering can not remove the interfering signals with the same frequency; compared with a shielding method, hardware devices required by the invention has smaller volume and lighter weight, thus not increasing the difficulty of system layout.

The invention relates to the field of cabinets, in particular to an intelligent cabinet with a kitchen waste treatment system. The intelligent cabinet comprises a cabinet body, a water sink, a draining plug and a waste discharge plug and is characterized in that a crushing box, a solid collecting mechanism and a draining pipe are arranged in the cabinet body; the cabinet body comprises a top table board and a cabinet body part below the table board, the water sink is arranged below the table board, the top of the water sink is arranged on the table board, and the bottom of the water sink extends into the cabinet body part; a crushing mechanism, a pushing mechanism and a filtering mechanism are sequentially arranged in the crushing box from top to bottom, the filtering mechanism is connected with a percolate draining pipe which is lower than a draining elbow and communicated with the draining pipe, and the percolate draining pipe is provided with a flowmeter; the solid collecting mechanism comprises a spiral conveyor connected with the crushing box and a waste containing device. The intelligent cabinet has the advantages that the waste treatment state of the cabinet does not conflict with the use state of the conventional water sink, the cabinet conforms to the use habits of people, and solid and liquid in the waste can be separated.

The invention discloses a formation method of a transistor. The method comprises the following steps: providing a semiconductor substrate including a first area, wherein a dielectric layer is formed on the surface of the semiconductor substrate, and the dielectric layer is internally provided with a first groove exposing a part of the surface of the first area of the semiconductor substrate; forming a gate medium material layer on the surface of the inner wall of the first groove and the dielectric layer; forming a protective material layer on the gate medium material layer; forming an adherence material layer on the protective material layer by use of a physical vapor deposition technology; forming a first work function material layer by use of an atomic layer deposition technology, wherein the material of the adherence material layer is the same as the material of the first work function material layer; forming a grid metal layer on the first work function material layer, wherein the grid metal layer fills up the groove; and performing planarization processing on the grid metal layer, the first work function material layer, the adherence material layer, the protective material layer and the grid medium material layer by taking the surface of the dielectric layer as a stop layer so as to form a first grid structure disposed in the first groove. The method provided by the invention can improve the performance of the transistor.

The invention discloses a method and device for treating and recycling an organic exhaust gas with low concentration and large air volume, which is designed for solving the problem that the existing method and device cannot be used for treating the organic exhaust gas with low concentration and large air volume well. The method for treating and recycling organic exhaust gas with low concentration and large air volume disclosed by the invention comprises the following steps of: adsorbing a solvent from the organic exhaust gas by using honeycomb active carbon as an adsorbent; and carrying out desorption on the adsorbent by using a hot nitrogen gas when the solvent in the adsorbent reaches a set saturation value. The device disclosed by the invention comprises an adsorbing system which uses the honeycomb active carbon as the adsorbent and a desorption system which uses the hot nitrogen gas as a desorption gas. The method and device for treating and recycling organic exhaust gas with low concentration and large air volume disclosed by the invention have a reasonable structure and low cost, are suitable for treating and recycling organic exhaust gases with low concentration and large air volume of various solvents, and especially suitable for recycling an organic solvent with a high boiling point and volatility.

The utility model relates to a method for forming a dual-depth trench, which includes the steps that: a semiconductor substrate, which sequentially consists of a silicon substrate, a buried oxide layer, a barrier layer and an oxide layer, is provided; the semiconductor substrate comprises a pixel area and a peripheral area; a photoresist pattern is formed on the oxide layer; with the photoresist pattern as a mask, the oxide layer is implanted with ions and annealed, so that an ion-implanted layer is formed in the oxide layer of the peripheral area; the oxide layer, the barrier layer, the buried oxide layer and the silicon substrate are etched, so that a first trench and a second trench are formed; and the depth of the first trench is smaller than the depth of the second trench. The invention can effectively increase the image quality of a CMOS image sensor.

The invention relates to a retinal prosthesis with a spherical arc substrate. The retinal prosthesis comprises a microelectrode array, a microelectrode array outgoing line portion and an external electrical stimulation lead-in portion. The retinal prosthesis is mainly technically characterized in that the microelectrode array is arranged on the surface of the spherical arc retinal prosthesis. The center of the retinal prosthesis is more effectively fitted with the surface of the retinal prosthesis by the aid of the microelectrode array on the surface of the spherical arc retinal prosthesis, a microelectrode is arranged on a spherical arc convex surface, so that the microelectrode can effectively contact with the surface of the retinal prosthesis, electrical stimulation efficiency is improved, stimulation current of the microelectrode array on the surface of the retinal prosthesis is reduced, the service time of the microelectrode array is prolonged, the retinal prosthesis is effectively protected, and spherical arc polychlorostyrene with biocompatibility replaces xylene materials and serves as a flexible substrate, so that manufacture and implantation of the electrode array are facilitated.

The invention discloses a permanent magnet, a permanent magnet motor and a compressor. The permanent magnet has the maximum length L1 and the maximum width W1. The working area of the permanent magnet is S, wherein the working area S, the maximum length L1 and the maximum width W1 meet the relational expression that S is smaller than L1*W1. According to the permanent magnet, the performance of the motor can be improved, the material cost can be saved, the rotor assembling difficulty of a rotor will not be increased, and therefore the cost performance of the motor is improved.

The device has a turbine with a turbine wheel and a compressor with a compressor wheel connected by shaft and in a housing so that an axial force acts on the turbine wheel and the connected shaft towards the turbine in the event of the compressor wheel bursting. An arrangement for axially securing the shaft and turbine wheel is arranged on the shaft to prevent axial shaft and turbine wheel motion towards the turbine if the compressor wheel bursts. The device has a turbine and a compressor connected to the turbine, whereby the turbine has a turbine wheel and the compressor contains a compressor wheel (7), which are connected together by a shaft (10) and are arranged in a housing (9,16) so that an axial force acts on the turbine wheel and the connected shaft towards the turbine in the event of the compressor wheel bursting. An arrangement (22) for axially securing the shaft and turbine wheel is arranged on the shaft to prevent axial movement of the shaft and turbine wheel towards the turbine if the compressor wheel bursts. AN Independent claim is also included for the following: an arrangement for axially securing a shaft and connected components.

The invention discloses a drawer-type switch cabinet which comprises a cabinet body, wherein a placement groove is formed in the side surface of the cabinet body; and a drawer which transversely slides is arranged in the placement groove. The switch cabinet is characterized in that a locking device for locking the drawer is arranged on the cabinet body; a power spring is arranged in the placement groove; a push plate is arranged on one side, facing towards the drawer, of the power spring; a sliding block capable of sliding in a movement direction same as that of the drawer is arranged at one end, back to the push plate, of the power spring; and a compression device for pushing the sliding block is arranged on the cabinet body. When the drawer needs to be drawn out, the locking device is opened, and then the drawer can be easily pulled out by the action of the power spring. When the drawer needs to be closed, the compression device drives the sliding block to move far away from the drawer, so that the power spring cannot obstruct the drawer when the drawer is pushed, the locking device locks a position of the drawer after the drawer is completely pushed into the placement groove, and then the compression device pushes the sliding block to move towards the drawer to compress the power spring.

The invention relates to a multifunctional optical fiber melting-matching tray which comprises a rear cover plate, a front cover plate, a melting-welding chip, a melting-welding disc, a wrapping post, a terminal disc and a wire sleeve. The front cover plate is installed on one side of the rear cover plate, the melting-welding chip is installed on the melting-welding disc, an opening hole is formed in the melting-welding disc, the wrapping post is a circle with a wrapping lug, the wrapping lug penetrates through the opening hole in the melting-welding disc, the wrapping post is installed on the terminal disc, and the rear cover plate, the melting-welding chip, the melting-welding disc, the wrapping post and the terminal disc are sequentially arranged in the sequence from top to bottom. The wire sleeve is installed on the terminal disc, and the front cover plate is installed on the rear cover plate through a rotating shaft. The multifunctional optical fiber melting-matching tray can meet belt-shaped or bundle-shaped tail fibers of a plurality of adapters and movable connectors matched with the adapters and meet left-and-right fiber outlet of wiring, box-type optical branching devices below 1:32 and 2:32 can be installed, according to the multifunctional optical fiber melting-matching tray, varieties of trays are reduced, the period of goods preparation is shortened, and the management cost is reduced.

The invention provides a cambered surface display module. The cambered surface display module comprises a display panel and an integrated circuit element. The display panel bends around a virtual curvature mean axis to be in the shape of an arc plate and is provided with side edge with a curvature. The side edge bends around the curvature mean axis to be arc-shaped. The integrated circuit element forms a long-strip shaped integration. A first long edge extends along the extension direction of the integrated circuit element. The integrated circuit element is directly or indirectly connected with the side edge. The first long edge is allowed to extend along the extension direction of the virtual curvature mean axis. In this way, because the extension direction of the integrated circuit element is the same as that of the curvature generated by the display panel, the arrangement of the integrated circuit element and reliability of a circuit are not liable to be effected by curvature degrees of the display panel.

The invention provides a continuous processing method of heavymetal wastewater for obtaining clean water with high water quality and recovering heavy metals and a processing device thereof. The processing method first adopts bio-flocculant to flocculate the heavymetal wastewater during the pretreatment; one part of supernatant separated after flocculation is filtered by a filtering device which adopts Gamma-poly glutamate complex film as a filter element so as to obtain the clean water which can be directly discharged while the other part of the supernatant wrapped with sludge of the filter element enters a solid-liquid separation step; a vertical plate and frame filter press is employed to carry out the solid-liquid separation on the sludge separated out after the pretreatment and filtration, and the separated heavy metal slag is recovered and reused while the separated effluent is again treated with filtration. The clean water obtained by the treatment of the invention has high water quality; the heavy metal slag is easy to be recovered; the bio-flocculant used is nonpoisonous and degradable and the environment-friendly Gamma-poly glutamate complex film with biodegradability can be reused through backwashing technique.

The invention relates to a Chinese character input method which inputs a Chinese character by combination of syllables and strokes of the Chinese character. The strokes of the Chinese character are divided into a basic stroke, a combined stroke and a combined component; the basic stroke comprises a point, a horizontal stroke, a vertical stroke, an oblique stroke and a turning stroke; the combined stroke comprises a combined point, a combined horizontal stroke, a combined vertical stroke, a combined oblique stroke and a combined turning stroke; the combined component comprises a horizontally-vertically cross combined component, an enclosed combined component, a point-horizontal stroke combined component, an oblique horizontal stroke-oblique vertical stroke combined component and a turning horizontal stroke-turning point combined component. The coding length of the Chinese character is of four codes, wherein the two front codes are an initial code and a final code, and the two back stroke codes are of the first stroke of the left part and the first stroke of the right part respectively for the Chinese characters with left-and-right structure, the first stroke of the upper part and the first stroke of the lower part respectively for the Chinese character with up-and-down structure and the two front strokes for other Chinese character. The initials or finals, which are easily confused, are arranged on the same keys, and similar initials or finals are orderly arranged on keys. The input method has the advantages of simple Chinese character separation rules, easy memory and low coincident code rate; thereby, the input method is applied to the Chinese character input of numeric keyboards on computers, mobile phones, cashiers and PDA.

The invention is suitable for the technical field of LED (light-emitting diode) packaging, and provides an LED packaging method. The LED packaging method is characterized by comprising the steps of etching a plurality of parallel first half etching grooves on the upper part of a metal etching sheet; respectively welding a positive electrode and a negative electrode of an LED flip chip to the two sides of the first half etching grooves; coating fluorescence glue for covering the LED flip chip on the metal etching sheet and solidifying the fluorescence glue; forming transparent silicon glue for covering the fluorescence glue on the metal etching sheet and solidifying the transparent silicon glue; etching second half etching grooves communicated with the first half etching grooves at the bottom of the metal etching sheet; cutting to form LEDs. The LED formed through such a packaging method adopts the metal etching sheet serving as the positive electrode and the negative electrode of the LED between the chip electrode and a welding electrode at the application end for transition, so that no difficulty is increased at the application end in use of the LED product, and the method is completely equal to the use method of an injection molding support.

The invention relates to a crankshaft processing technology of a vertical shaft general gasoline engine, which comprises the procedures of drilling a center hole; milling end faces; carrying out the rough turning on input and output ends; turning a curve neck; milling a flat keyway; quenching input and output end rods; carrying out double-station filleted quenching; carrying out the finish turning of input and output ends; grinding input and output end bearing stations and tooth stations; grinding the curve neck; milling a semicircular keyway; grinding an oil seal station; grinding input end conical surfaces; grinding flat key stations; grinding output end conical surfaces; and carrying out press mounting on a timing gear, wherein the procedure of polishing the oil seal station is further arranged in the front of the procedure of press mounting of the timing gear. The invention can ensure that crankshafts processed with the technology are assembled on a crankcase and can upwards spun engine oil infiltrating between an oil seal and the surface of a crankshaft oil seal station to the crankcase when the gasoline engine works, therefore, the engine oil is avoided from leaking outwards from the space between the oil seal and a crankshaft, and the quality of the vertical shaft general gasoline engine is enhanced.

The invention reveals a keyboard, and the keyboard comprises a film circuit board, a light-emitting part, a triggering structure layer, and a plurality of key caps. The film circuit board comprises a plurality of switches. The light-emitting part is electrically connected to the film circuit board. The triggering structure layer is stacked on the film circuit board and the light-emitting part, and comprises a transparent insulating part and a plurality of elastic triggering parts. The transparent insulating part is located on the light-emitting part, and the plurality of elastic triggering parts are correspondingly located on the plurality of switches. The plurality of key caps are correspondingly disposed on the plurality of elastic triggering parts, wherein one key cap is provided with a transparent part which is corresponding to the transparent insulating part. Therefore, the transparent insulating part maintains the function that the light-emitting part illuminates the transparent part, and achieves the electrostatic discharge protection of the light-emitting part at the same time.

The invention discloses a simplified multi-level converter space vector modulation method, and relates to the field of space vector modulation methods of multilevel converters, and is used solve problems that the redundant switch state is greatly increased along with the increase of the level number in the traditional SVM technology, and the SVM is difficult to realize due to the calculation of the redundant switch state and the selection of a proper switch state. The method comprises following steps: step 1: a vector expression is established; step 2: a reference vector track model is established; step 3: reference signals and level signals are respectively represented by coordinate components and corresponding component sum of reference vector and basic vector; step 4: a star-shaped connection multi-level converter is constructed; step 5: the sampling of the phase voltage reference vector track model of the star-shaped connection multi-level converter can be carried out, and the reference vector is acquired after synthesizing; step 6: equivalent base vector action time is calculated; step 7: the components of the equivalent basic vector of the star-shaped connection multilevel converter and the component sum are used as the switch state used for controlling the triangle-shaped connection multilevel converter line voltage.

The invention discloses a horticultural composite phase change pipe and a preparation method thereof; the prepared horticultural composite phase change pipe takes inorganic phase change material as the main material and is sealed in a polyethylene pipe; and the inorganic phase change material is prepared from the inorganic phase change material in percentage by mass: 8.8 to 10.6 percent of Na2SO4, 72 to 74 percent of Na2HPO4.12H2O, 1.5 to 3.5 percent of CaC12, 1 percent of Na2B4O7.10H2O, 0 to 1 percent of CMC and the balance water, and the sum of the percentage of the inorganic phase change material is 100 percent. The preparation method comprises the following steps that: the inorganic phase change material is prepared and mixed according to different phase change temperature and latent heat requirements; and then the mixed inorganic phase change main material is inorganically heated to the temperature which exceeds the phase change temperature, and then the material is changed into liquid state; the liquid material becomes saturated solution; liquid filling equipment seals the saturated solution with the polyethylene pipe; and when in sealing, the actual pipe diameter and the length of sealing is adjusted according to the bearing capability of different building walls and the required heat load, and the horticultural composite phase change pipe is prepared.

First, the method provides substrate. Cut line on the substrate divides the substrate into at least one chip. Being formed on the substrate, grooves are positioned on prearranged area, where weld pads are to be formed, or on the area between pads and the cut line. Low electrode is formed on sidewall of substrate, and in substrate of base. Dielectric layer of capacitance and up electrode are formed on the substrate. The up electrode is filled in the grooves. Then, being formed on the substrate, the doping area is connected to the low electrode electrically. Afterwards, first weld pad and second weld pad are formed on the substrate. Through the doping area, the low electrode is connected to the first weld pad electrically, and the up electrode is connected to the second weld pad electrically. Since capacitor is formed under pads, or on the substrate between pads and the cut line, the invention reduces area engaged by chip.

The invention relates to an X-ray multilayer film structure aiming at response of multiple working energy points. The structure comprises a KB objective lens, wherein the KB objective lens is coated with multiple film systems aiming at X-ray response at different energy points; the upper surface of a substrate of the KB objective lens is coated with a film system C, the upper surface of the film system C is coated with both a film system A and a film system B, and the film systems A and B are arranged front and back. Compared with the prior art, on the premise of not reducing the imaging performance of the system, the X-ray multilayer film structure aiming at response of multiple working energy points is used for realizing the responsiveness of X-ray at multiple working energy points, so that the structure can be applied to an ICF (inertial confinement fusion) physical experiment at different working energy points by using a same set of KB system. According to the structure provided by the invention, the difficulty and cost of designing and manufacturing multiple KB systems which respectively work at different energy points as well as the complexity level and time for adjusting the system on an ICF device are remarkably lowered.

The present invention provides a electrical connector for attenuating vibrations, in particular for the injector of a motor vehicle engine. The inventive connector comprises a locking device (13) for elastical interlocking which is provided with an axial stop surface (24) forming jointly with the associate stop surface of the complementary locking device (15) of a counterpart an mutual rest preventing the disconnection of the connector (1) and the counterpart (3). Said connector comprises an elastic vibration attenuating member (43) arranged in such a way that it produces the mutual elastic rest force of the stop surfaces (24, 65) when the connector (1) and the counterpart thereof are coupled. The invention can be used for connecting the injector of a motor vehicle internal combustion engine.

An adding method of organic carbon dissolved in ballast water relates to the field of ship. 0.20-1.23kg of grape sugar, 0.40-1.85kg of cane sugar and 20-33kg of sea mud are added in 250 tons of inflowing water with different salinity so that the DOC content in the inflowing water just reaches the specification of G8 guide rule, thereby ensuring that continental rise experiments can be carried out efficiently and also not increasing the difficulty of processing due to overhigh DOC content.