33results about How to "Enhancement" patented technology

The invention relates to a device for testing a packet-switched radio network. The device comprises a network traffic simulator for traffic in a radio access network; and a serving general packet radio service GPRS support node simulator connectable to a gateway GPRS support node for coupling the device to a service network. The device is connectable to a control computer for giving commands to the device. For testing packet-switched services, the device is connectable to a test computer, in which a user interface of a service is run on a given platform. A name server is connectable to the device, and a content server via the service network. The device is able to generate billing data records from traffic caused by the packet-switched service.

The invention discloses a method for remedying cadmium-contaminated soil through turfgrass and microorganism combination, and relates to a heavy metal-contaminated soil treatment technology. The method comprises the following steps: (1) screening cadmium-resistant bermuda grasses so as to obtain the bermuda grasses with strong cadmium resistance; (2) collecting rhizosphere soil of the bermuda grasses in a contaminated area; (3) screening cadmium-resistant microorganisms so as to obtain the microorganisms with the strongest cadmium resistance, which are fungi-aspergillus aculeatus; (4) preparing microorganism remedying matrixes; and (5) carrying out turfgrass and microorganism combined remediation. The method has the advantages that the dominant plants, namely the bermuda grasses in the cadmium-contaminated area are used as cadmium-resistant plant screening sources and have strong adaptability to the soil environments in the contaminated area; the cadmium-resistant fungi-aspergillus aculeatus is derived from the rhizosphere soil of the bermuda grasses in the cadmium-contaminated area, is well compatible with the cadmium-resistant bermuda grasses and has strong adaptability to the soil environments in the contaminated area; the microorganism remedying matrixes can be used for ensuring the nutrient supply of microorganism growth, enhancing the operability of applying the microorganisms in soil and improving soil environments, and the waste is effectively utilized; the method is low in cost and simple and convenient to operate.

A supplement composition for enhancement of anti-inflammation process is provided, which contains nettle leaf extract, hops extract, and turmeric rhizome extract. The supplement composition further includes hyaluronic acid, sodium salt, glucosamine sulfate, and chondroitin sulfate. Further provided is a method of using the supplement composition for enhancement of anti-inflammation process.

The invention discloses preparation methods and applications of a pyridine nitrogen enriched ultrathin carbon nanosheet material and metal composite of the pyridine nitrogen enriched ultrathin carbonnanosheet material. Specifically, a nitrogen source and a carbon source are mixed, the mixture reacts under a high-temperature condition, and solid phase mixing is adopted. The nitrogen source can bemelamine, dicyandiamide, cyanamide or urea and the like, and the carbon source can be D-GAH (glucosamine hydrochloride), glucose or 2-methylimidazole and the like. The obtained nitrogen-doped carbon nanosheet material and the metal composite thereof have the characteristics of high nitrogen doping levels and size graded porous combined structures in composition and structure, have higher specificcapacitance, better chemical stability and thermal stability, higher cycle stability and more ideal conductivity and the like. The composite electrode is tested as a working electrode material of a supercapacitor and still has higher specific capacitance, better rate performance and cycle stability under the condition of large current density.

The invention discloses anti-alcoholism beverage. The anti-alcoholism beverage consists of the following materials by weight: 20-30 parts of mature vinegar, 60-80 parts of honey, 2-5 parts of kudzu vine root juice, 2-5 parts of kudzu vine flower juice, 0.5-2 parts of salt and 0.5-1 part of propolis. A preparation method of the anti-alcoholism beverage includes the steps as follows: mixing of the mature vinegar, the honey, the kudzu vine root juice, the kudzu vine flower juice, the salt and the propolis, stirring to uniform, vacuum filtration and flash pasteurization, thus obtaining the anti-alcoholism beverage. When needing sobering up, a drunk can drink 100-200ml of the anti-alcoholism beverage and then stay in bed, and usually, the drunk can be sorbered up within 10-30 minutes. The anti-alcoholism beverage has a good anti-alcoholism effect and no side effect to a human body; due to the components such as the mature vinegar, the honey, the propolis and the like with high nutritional value, the anti-alcoholism beverage also has nourishing and health care efficacies; and with unique flavor and good mouthfeel, the anti-alcoholism beverage also can serve as ordinary beverage even for people who does not drink. The anti-alcoholism beverage has the advantages of good anti-alcoholism effect, fast effect taking speed, high nutritional value, no side effect, and the like.

The invention discloses a novel #-shaped building damping device which comprises building beams and damping pieces. The first, second, third and fourth building beams form a #-shaped structure. The first damping piece is arranged among the first, second, third and fourth building beams and internally provided with a second damping piece. The second damping piece is internally provided with a lowerpositioning plate. The upper end face of the lower positioning plate is connected with an upper positioning plate through a connecting column. The damping pieces are arranged between the upper positioning plate and the building beams. Energy consumption damping can be conducted on the first, second, third and fourth building beams, manufacturing is simple, construction is convenient, and wide application and popularization are facilitated in an earthquake area; by arranging the second damping piece, secondary energy consumption damping can be realized, and the damping effect is better.

Provided is a graphite material for a heat exchanger. The graphite material is mainly prepared by mixing pitch meso-carbon microbeads, a petroleum coke stage material and modified pitch, wherein the petroleum coke stage material is needle petroleum coke subjected to secondary coking or third-time coking. A preparation method comprises the steps that the petroleum coke and modified pitch slurry are subjected to mixing kneading and rolling and flaking under vacuum condition, cooling and smashing are conducted in sequence, the smashed materials are subjected to mixing, standing, isostatic press molding, calcining and smashing, and the petroleum coke stage material is obtained; the petroleum coke stage material and the pitch meso-carbon microbeads are subjected to mixing kneading, the modified pitch is added and rolled to be flakes, cooling and smashing are conducted in sequence, the smashed materials are subject to mixing, standing, isostatic press molding, calcining carbonization treatment and graphitization treatment, and the graphite material for the heat exchanger is obtained. According to the graphite material for the heat exchanger, the needle petroleum coke subjected to secondary coking or third-time coking is used for the first time, toughness and self-lubrication of graphite are enhanced, the processing efficiency of graphite machinery is improved, and thermal conductivity of graphite pieces can be increased.

This invention provides a fuel oil composite used in diesels including the following compositions: small amount of alkyl fatty acid esters in the general formula of R1(OH)nCOOR2, in which, R1 is the alkyl radical of C5-C25, R2 is the alkyl of C1-C8 and n is an integer of 0-12, yet the alkyl fatty acid ester with n not equal to zero is heavier than total fatty acid ester by 40%, the content of which in the composite is 0.01-1weight% and it is prepared by catalyzing and oxidizing bio-diesel to turn the double bond in the alkyl radical to alkyl.

The invention discloses a device and method for recovering cadmium cotton through spin current electric field enhanced replacement. The device comprises a reaction tank body, an aluminum lining cathode, a zinc bar anode, a filter bottom net, a coupling power source and a heating device. The method comprises the following steps that the reaction tank body is assembled, and a coupling electric field is arranged; a solution is added, and the pH value of the solution is adjusted; the solution is heated to make the temperature rise; in the A-stage reaction, the solution and a zinc bar anode are subjected to a replacement reaction in a spin current state; in the B-stage reaction, the solution and the zinc bar anode are continuously reacted in the spin current state and under the condition of coupling the electric field; centrifuging is conducted, the solution in the reaction tank body is evacuated, and the cadmium cotton is collected; By adoption of the device and method, the electrochemical reaction process is promoted by using the electric field, the mass transfer process is promoted by using the spin current relative to the cathode and the anode by spinning of the reaction tank body, continuous exposure of zinc wrapped in the cadmium cotton is promoted by using gravity and mechanical force friction, the recovering efficiency of the cadmium cotton is effectively improved, the zinc consumption is reduced, and the grade of the product cadmium cotton is increased.

The invention relates to a preparation method of a direct methanol fuel cell negative support material. According to the technical scheme, the preparation method mainly comprises the following steps:taking divinylbenzene containing tert-butyl catechol as a stabilizer and tin oxide as raw materials; coating the surface of the tin oxide with polydivinylbenzene by adopting a dispersion polymerization method; and then performing pyrolysis to prepare the direct methanol fuel cell negative support material with tin particles uniformly dispersed in a carbon matrix. The preparation method has the beneficial effects that the preparation cost can be greatly reduced; the cost performance is relatively high; the material has relatively strong market competitiveness compared with products at home andabroad; the direct methanol fuel cell negative support material product can be manufactured through the method; and a negative support body manufactured from the negative support material has the characteristics of being low in shrinkage rate, small in deformation, high in graphitization degree, high in conductivity, good in mechanical property and the like.

The invention discloses a method for remedying cadmium-contaminated soil through turfgrass and microorganism combination, and relates to a heavy metal-contaminated soil treatment technology. The method comprises the following steps: (1) screening cadmium-resistant bermuda grasses so as to obtain the bermuda grasses with strong cadmium resistance; (2) collecting rhizosphere soil of the bermuda grasses in a contaminated area; (3) screening cadmium-resistant microorganisms so as to obtain the microorganisms with the strongest cadmium resistance, which are fungi-aspergillus aculeatus; (4) preparing microorganism remedying matrixes; and (5) carrying out turfgrass and microorganism combined remediation. The method has the advantages that the dominant plants, namely the bermuda grasses in the cadmium-contaminated area are used as cadmium-resistant plant screening sources and have strong adaptability to the soil environments in the contaminated area; the cadmium-resistant fungi-aspergillus aculeatus is derived from the rhizosphere soil of the bermuda grasses in the cadmium-contaminated area, is well compatible with the cadmium-resistant bermuda grasses and has strong adaptability to the soil environments in the contaminated area; the microorganism remedying matrixes can be used for ensuring the nutrient supply of microorganism growth, enhancing the operability of applying the microorganisms in soil and improving soil environments, and the waste is effectively utilized; the method is low in cost and simple and convenient to operate.

A bearing holder (66) having a bearing (67) rotatably supporting a crankshaft (14) is fixed so as to face an opening (11k) of the engine case (11). A gas-liquid separation chamber (83) is formed between a cover member (68) covering the opening (11k) and the bearing holder (66). Therefore, by utilizing the bearing holder (66) as a part of the wall surface of the gas-liquid separation chamber (83),the gas-liquid separation chamber (83) can be partitioned without increasing the number of components and without forming a special wall surface in the engine case (11). Thus, it is possible to reducethe size and weight of the engine case (11), and reduce the cost by simplifying the shape thereof and reducing the number of components. Also, a labyrinth 82 is formed by ribs (66d, 66e, 68a, 68d) projecting from the bearing holder (66) and the cover member (68), and therefore gas-liquid separation can be effectively performed by the labyrinth (82). Thus, it is possible to provide a small light gas-liquid separation device with a small number of components.

The invention relates to a light-curing 3D printing device, which includes a model plate, a curing model is combined on the model plate, and a light guide component, the light guide component includes a coupling-in part, an optical waveguide and a coupling-out part, and the coupling-out part corresponds to the model plate Set, the coupling part converts the incident light beam into the light waveguide and transmits it to the outcoupling part, and through the outcoupling part, it is converted and emitted from the outcoupling area between the light guide component and the model plate, and the model plate and the light guide component can move relatively . The present invention gets rid of the relatively fixed positional relationship between the light source and the printing material container in the prior art, can realize the flexible layout of the relative positional relationship between the light source and the printing material container, improves the overall performance of the device, and is beneficial to improve printing efficiency and Printing accuracy.

The invention discloses a quickly-assembled double-layer corrugated steel square culvert structure and a construction method, belongs to the technical field of box culvert construction, and can improve the assembly precision, reduce the field workload, shorten the field assembly time and realize quick assembly. The splicing body comprises a plurality of plates which are sequentially connected end to end to form a closed annular structure; each plate comprises an inner-layer corrugated plate and an outer-layer corrugated plate, and the inner side tangent line of the inner-layer corrugated plate is separated from the outer side tangent line of the outer-layer corrugated plate; the plate is bent in the direction from the outer-layer corrugated pipe to the inner-layer corrugated pipe to form a bent part and a straight part; and a flange is connected between the edge of the inner-layer corrugated plate and the edge of the outer-layer corrugated plate.

The invention discloses preparation methods and applications of a pyridine nitrogen enriched ultrathin carbon nanosheet material and metal composite of the pyridine nitrogen enriched ultrathin carbonnanosheet material. Specifically, a nitrogen source and a carbon source are mixed, the mixture reacts under a high-temperature condition, and solid phase mixing is adopted. The nitrogen source can bemelamine, dicyandiamide, cyanamide or urea and the like, and the carbon source can be D-GAH (glucosamine hydrochloride), glucose or 2-methylimidazole and the like. The obtained nitrogen-doped carbon nanosheet material and the metal composite thereof have the characteristics of high nitrogen doping levels and size graded porous combined structures in composition and structure, have higher specificcapacitance, better chemical stability and thermal stability, higher cycle stability and more ideal conductivity and the like. The composite electrode is tested as a working electrode material of a supercapacitor and still has higher specific capacitance, better rate performance and cycle stability under the condition of large current density.

Provided is a method of a weak sealing part through simply processing the medical multichamber container, comprising a multichamber container manufacturing procedure and a strengthening procedure of the weak sealing part for manufacturing the medical multichamber container (10), which comprises a first holding part (11) for holding medicament, a second holding part (12) for holding medical solution, an empty holding part (13), a pair of side strong sealing part (16) forming two side parts of each holding part, a medical solution side weak sealing part (17) forming the bulkhead between the first holding part (11) and the second holding part (12), a discharge side weak sealing part (18) forming the bulkhead between the first holding part (11) and the empty holding part (13); a strengtheningfilm (20) for adhibiting and strengthening a discharge side sealing part (18) in the way of covering the surface of the first holding part (11) in the weak sealing part strengthening procedure and inthe way of partitioning the interval from a first bouderline margin (19) to the discharging direction in the discharge side sealing part (18).

According to the seal safety management system and method, when a seal user opens a seal cover, a camera is automatically started to shoot a file to be sealed, when the seal user covers the seal cover, the camera is automatically closed, and a shot video is stored; and the video information is sent to a server for storage and a PC (Personal Computer) end of a stamp holder through the wireless communication module, so that the stamp holder can check the video information. An electromagnet and an infrared distance measuring sensor with an upward port are embedded in the seal cover, and the infrared distance measuring sensor detects the distance between the seal cover and the shell, so that the opening and closing information of the seal cover is obtained, and the camera is automatically controlled. According to the invention, the operation process of seal using can be intelligently managed, a seal holder can conveniently know and master a file to be sealed, once a problem occurs, an alarm can be immediately given to inform the seal holder, the safety of the seal using process is greatly improved, and the seal holder can conveniently know and master effective information of the seal using process.

A bearing housing (66) is fixed facing the opening (11k) of the engine case (11), and the bearing housing includes a bearing (67) that rotatably supports the crankshaft (14), and the cover member covering the opening (11k) The gas-liquid separation chamber (83) is formed between (68) and the bearing housing (66), so the bearing housing (66) can be used as a part of the wall surface of the gas-liquid separation chamber (83) without increasing the number of parts , and can divide the gas-liquid separation chamber (83) without forming a special wall surface on the engine box (11), and realize the miniaturization, light weight, simplification of shape of the engine box (11) and the cost caused by the reduction of the number of parts decline. In addition, the labyrinth structure (82) is formed by the ribs (66d, 66e, 68a, 68b) protruding from the bearing housing (66) and the cover member (68), so the gas-liquid separation can be effectively performed through the labyrinth structure (82). In this manner, it is possible to provide a gas-liquid separation device for an engine that is small, lightweight, and has a small number of parts.

The invention relates to a local reinforcing method for a battery pack box cover and a reinforcing type battery pack box cover. The reinforcing type battery pack box cover comprises a box cover body and reinforcing structures, wherein the inner surface of the box cover protrudes outwards to form a cross-shaped groove; the cross-shaped groove comprises a transverse groove and a longitudinal groovewhich are perpendicularly formed in a crossed mode; the longitudinal groove is formed in the length direction of the box cover; the transverse groove is formed in the width direction of the box cover;the depth of the transverse groove is smaller than that of the longitudinal groove; the reinforcing structures are fixed to the two ends of the transverse groove correspondingly and cover the groovebottom and the groove wall of the transverse groove and the inner surface of the box cover correspondingly. The reinforcing structures are arranged at the two ends of the transverse groove of the battery pack box cover, so that the overall and local strength of the battery pack box cover can be enhanced, the risk that the battery pack box cover is locally broken is reduced, and the stress distribution of the battery pack box cover is uniform; the thickness of the battery pack box cover does not need to be integrally increased, that is, the weight of the box cover does not need to be additionally increased, so that the overall strength can reach the standard after the reinforcing structures are additionally arranged.

The invention discloses a health preserving wine and a preparation method thereof. It is made from the following raw materials, fresh grapes, Saccharomyces cerevisiae, liquor, crystal sugar, rhizoma bletillae, Polygonum multiflorum, Dendrobium candidum and Panax notoginseng powder. The steps are as follows: cleaning and squeezing the fresh grape to obtain product A; boiling A 45-60 minutes, obtaining product B; b is added with crystal sugar and mixed to obtain C product; add Saccharomyces cerevisiae to product C, stir evenly, and ferment for 20-30 day, obtaining E product; E product is filtered to obtain F product; F is sterilize to obtain G product. G is evenly mix with Chinese liquor to obtain H product; H and notoginseng pow are evenly mixed to obtain product I; baiji, radix Polygoni Multiflori and herba Dendrobii are clean, air-dried and ground to obtain product J; Mix product J with product I and store 2-3 month later, K product was obtain; Filter the K product to obtain the finished product. The invention not only inherits the traditional wine, but also adds rhizoma bletillae, Polygonum multiflorum, Dendrobium officinale and Panax notoginseng powder to increase the health preservation effect of the wine.

The present invention relates to a fuel injection pump for internal combustion engines, having a pump housing, in which a feed device is accommodated, whose operation is controlled with the aid of a control unit that is accommodated in a control-unit housing mounted to the pump housing. In order to ensure that the control-unit housing is sufficiently cooled, a cavity, into which a fuel inlet empties and at which a connecting line leading to the feed device originates, is formed between the upper side of the pump housing and the lower side of the control-unit housing; a filler piece having an inlet tulip (18) being situated in the cavity, the delivered fuel being directed from the cavity, through the inlet tulip and the connecting line, to the feed device.

The invention discloses an off-machine pre-adjusting and correcting device which comprises a correcting and adjusting mechanism and a rotating and adjusting mechanism, and the correcting and adjusting mechanism comprises a first vertical rod, a first transverse rod, a first sliding rail, a first sliding block, a first U-shaped seat, a second U-shaped seat and a V-shaped frame. A push handle is pushed to enable a first U-shaped seat to drive a second connecting plate to move left and right through a second U-shaped seat, so that the second connecting plate drives a scale correction instrument to be adjusted front and back through an L-shaped plate, and a second wobble plate is rotated to drive a second moving seat to move downwards through a second screw. The pneumatic control valve is pressed down to control the output shaft of the air cylinder to move downwards to be separated from the clamping groove, and then the connecting box is rotated to drive the preassembled part to rotate, so that the rotational symmetry degree of the part is confirmed. And clamping error detection can be conveniently carried out on parts and jigs which are pre-arranged and machined on a machine.

The invention relates to a curtain wall. The curtain wall comprises connecting holes and two curtain wall boards, wherein the two curtain wall boards are parallel to each other. At least one reinforcing rib I and at least one reinforcing rib II are arranged between the two curtain wall boards, wherein the diameters of the reinforcing rib I and the reinforcing rib II are different. The reinforcing rib I is connected with the reinforcing rib II through a plurality of stiffeners. The reinforcing rib I and the reinforcing rib II are arranged in a concentric mode and are of a circular structure or a triangular structure. The curtain wall is simple in structure and reasonable in design; the reinforcing rib I and the reinforcing rib II are arranged between the curtain wall boards which are arranged parallel to each other, deformation of the curtain wall boards can be effectively reduced when strong wind or a certain impact acts on the curtain wall boards; consequently, the curtain wall boards are strengthened and potential safety hazards are reduced.

The invention discloses a profile arcing device which comprises a plate body, a lifting assembly and an arcing roller, one end of the plate body is movably connected with a gear set, the bottom end of the plate body is fixedly provided with a fixing shell, the bottom end of one end of the plate body is movably connected with the arcing roller, the bottom end of the lifting assembly is provided with a push wheel, and the top end of the push wheel is provided with a fixing structure. And a reinforcing structure is arranged in the arcing roller. By arranging the fixing structure, the lifting assembly and the push wheel can be fixed, during use, the lifting assembly and the push wheel need to be fixed, at the moment, the push wheel is taken up, then a clamping block at the top end of the push wheel is aligned with a clamping groove, then the push wheel is pushed upwards, and at the moment, the push wheel pushes the clamping block to be inserted into the clamping groove; and then a fixing bolt penetrates through the lifting assembly and is screwed into the clamping block, at the moment, the lifting assembly and the push wheel can be fixed, guiding can be achieved through clamping between the clamping block and the clamping groove, and fixing between the lifting assembly and the push wheel is achieved.

Provided is a graphite material for a heat exchanger. The graphite material is mainly prepared by mixing pitch meso-carbon microbeads, a petroleum coke stage material and modified pitch, wherein the petroleum coke stage material is needle petroleum coke subjected to secondary coking or third-time coking. A preparation method comprises the steps that the petroleum coke and modified pitch slurry are subjected to mixing kneading and rolling and flaking under vacuum condition, cooling and smashing are conducted in sequence, the smashed materials are subjected to mixing, standing, isostatic press molding, calcining and smashing, and the petroleum coke stage material is obtained; the petroleum coke stage material and the pitch meso-carbon microbeads are subjected to mixing kneading, the modified pitch is added and rolled to be flakes, cooling and smashing are conducted in sequence, the smashed materials are subject to mixing, standing, isostatic press molding, calcining carbonization treatment and graphitization treatment, and the graphite material for the heat exchanger is obtained. According to the graphite material for the heat exchanger, the needle petroleum coke subjected to secondary coking or third-time coking is used for the first time, toughness and self-lubrication of graphite are enhanced, the processing efficiency of graphite machinery is improved, and thermal conductivity of graphite pieces can be increased.

The present invention relates to the field of chemical additives, and in particular relates to a fabric sizing additive, which comprises, by mass, 5-8 parts of potato flour, 5-8 parts of calcium carbonate powder, 3-5 parts of high gluten flour, 1-2 parts of wax tablets, 2-3 parts of butter, 1-2 parts of an antistatic agent, 0.5-0.8 part of sodium hexametaphosphate, 0.2-0.4 part of formic acid, 0.1-0.2 part of a crosslinking agent, and 2-3 parts of butter monoacetate. The fabric sizing additive is more even in viscose fiber cloth sizing, can greatly enhance yarn, improves yarn stretching tensile properties, and can make the sized viscose fiber cloth smoother.

The invention discloses anti-alcoholism beverage. The anti-alcoholism beverage consists of the following materials by weight: 20-30 parts of mature vinegar, 60-80 parts of honey, 2-5 parts of kudzu vine root juice, 2-5 parts of kudzu vine flower juice, 0.5-2 parts of salt and 0.5-1 part of propolis. A preparation method of the anti-alcoholism beverage includes the steps as follows: mixing of the mature vinegar, the honey, the kudzu vine root juice, the kudzu vine flower juice, the salt and the propolis, stirring to uniform, vacuum filtration and flash pasteurization, thus obtaining the anti-alcoholism beverage. When needing sobering up, a drunk can drink 100-200ml of the anti-alcoholism beverage and then stay in bed, and usually, the drunk can be sorbered up within 10-30 minutes. The anti-alcoholism beverage has a good anti-alcoholism effect and no side effect to a human body; due to the components such as the mature vinegar, the honey, the propolis and the like with high nutritional value, the anti-alcoholism beverage also has nourishing and health care efficacies; and with unique flavor and good mouthfeel, the anti-alcoholism beverage also can serve as ordinary beverage even forpeople who does not drink. The anti-alcoholism beverage has the advantages of good anti-alcoholism effect, fast effect taking speed, high nutritional value, no side effect, and the like.

The invention discloses palm-based artificial graphite and a preparation method thereof, and relates to the technical field of graphite, and the preparation method comprises the following steps: screening palm shells, and sequentially drying and crushing the palm shells which are qualified in screening to obtain palm-based precursor powder; mixing and stirring asphalt and tire oil in proportion toobtain asphalt tire oil mixed liquid; mixing and stirring the palm-based precursor powder and the asphalt tire oil mixed liquid to obtain a mixed material; carrying out fermentation treatment on themixed material and a catalyst to obtain a fermented mixed material; and sequentially carrying out thermal cracking and graphitization treatment on the fermented mixed material to obtain the palm-basedartificial graphite. The preparation method of the palm-based artificial graphite is simple, safe and reliable in operation process, high in production efficiency, low in production cost and high inproduct graphitization degree.