1591results about How to "Avoid churn" patented technology

A method for breeding beef cattle and mutton sheep standardly on a large scale through photovoltaic facilities includes the four parts that first, a photovoltaic facility greenhouse is built, maize seedlings or high-quality green forage grass Zea mexicana is produced throughout the year to be used as green fodder of beef cattle and mutton sheep; second, the beef cattle and the mutton sheep are bred and bio-organic fertilizer is produced standardly on a large scale through the photovoltaic facility greenhouse; third, photovoltaic power generation is performed for self use, and excessive electricity is connected into the state grid; fourth, a beef cattle and mutton sheep traceable system is built, and foods are made safe and sanitary. Through the method, not only can solar resources be effectively utilized to output clean and green energy, but also efficient planting and breeding can be achieved, by-products are processed into organic fertilizer, and a new path is provided for green agricultural production. Because a full-frame high-standard support system is adopted for the photovoltaic agricultural greenhouse and photovoltaic modules are arranged on the greenhouse, the space of the greenhouse can be effectively utilized, power utilized in the greenhouse can be supplied through a photovoltaic power station, and equivalently, stereoscopic production is formed on the land with the same area.

The invention relates to a processing method of food and beverage waste material, which is characterized in that steps are as follows in sequence: a sorting step, a braising and boiling step, a squeezing step, a drying step, a screening and packing step, wherein, in the braising and boiling step, the food and beverage waste material after the sorting step is braised and boiled for 10 to 30 minutes at the temperature of 35 to 55 DEG C. Partial liquid separated from the squeezing step is separated by a horizontal centrifuge, a separated solid or solid-liquid mixture steps in the drying step, the separated liquid utilizes waste heat in the dry step to concentrate, partial condensed water and exhaust gas are discharged, and then the concentrated liquid is sent to the horizontal centrifuge for circular separation. The technique method is more reasonable, the nutritious substance of food giblets can be fully utilized, and the liquid loss after being squeezed and filtered is prevented, at the same time, environmental pollution is avoided and reduced, and the production cost is lowered.

The invention provides an ozone catalyst preparation method which includes following steps: (1) mixing amorphous aluminum oxide powder, a catalyst powder and a pore-forming agent to form a catalytic mixture; (2) starting a pelletizer, feeding the amorphous aluminum oxide powder thereinto and spraying-in a binding agent to form aluminum oxide mother pellets; (3) feeding the aluminum oxide mother pellets and the catalytic mixture into the pelletizer and spraying-in a binding agent to form a catalyst formed pellet body; and (4) drying and roasting the catalyst formed pellet body to obtain the ozone catalyst. According to the method, the catalyst mixture is formed by mixing the amorphous aluminum oxide powder, the catalyst powder and the pore-forming agent. When the catalyst mixture is sintered onto the outer layer of the aluminum oxide mother pellets, a higher adhesive strength of the catalyst mixture is achieved since the components of the catalyst mixture and the aluminum oxide mother pellets are similar, thereby preventing loss of active components. Meanwhile, the ozone catalyst is ensured that the active components therein are effectively utilized, thereby reducing the production cost of the catalyst.

The invention discloses a method for preparing a semi-aromatic polyamide. The method comprises the steps of adding aromatic dicarboxylic acid and aliphatic diamine containing 4 to 14 carbon atoms into a high-pressure autoclave, applying nitrogen pressure in the autoclave under a condition of water existence, rising the temperature so as to pre-polymerize, and then preparing high viscosity semi-aromatic polyamide resin by performing tackifying reaction on the pre-polymerized materials. The method of the invention prepares the semi-aromatic polyamide by applying nitrogen pressure, the diamine loss is avoided and the mole ratio of the dicarboxylic acid and the diamine can be accurately controlled so as to acquire the high viscosity semi-aromatic polyamide. The pre-polymerized material which has a viscosity eta ranged from 0.06 to 0.3 dl/g tested in 96% sulfuric acid at 25 DEG C by performing the pre-polymerization reaction is acquired. After the tackifying reaction is performed, the viscosity eta of the semi-aromatic aromatic polyamide is ranged from 0.8 to 2.5 dl/g, the melting point of the semi-aromatic aromatic polyamide is ranged from 270 to 330 DEG C, the content of the end carboxyl is ranged from 15 to 80 mol/t and the content of the end amino is ranged from 15 to 80 mol/t.

The invention belongs to the field of food processing, and particularly discloses a process for preparing concentrated asparagus clear juice. The process for preparing the concentrated asparagus clear juice is characterized in that: asparagus waste serving as a raw material is processed into the asparagus clear juice by crushing, enzyme inactivation, cooling, juicing, sterilization, enzymolysis, clarification, concentration, secondary clarification, kieselguhr filtration, hyper-filtration, post concentration, sterile filling and complete clarifying technology. The process clarifies asparagus and milkwort by adopting the clarifying and filtering technology of combining biological, physical and chemical methods, fully prevents the loss of nutritional value of the asparagus, ensures the safety of a product, particularly prevents the waste of the asparagus resource by using the asparagus waste as the raw material for clear juice production, avoids environmental pollution, and fully improves the utilization value of the asparagus.

The invention provides a temperature control method of an air indirect cooling refrigerator. The temperature control method includes steps of A, dividing n equal parts between upper limit voltage V1 and lower limit voltage Vn+1 according to the preset value n to acquire n+1 voltage values V1 to Vn+1, and acquiring upper limit temperature Tu and lower limit temperature Td according to preset temperature Ts of a refrigerating chamber and preset difference temperature delta T; B, detecting current temperature Tc of the refrigerating chamber, comparing the Tc with the Td, starting counting, and setting a counting initial value as 0; C, respectively applying V1 or Vn+1 to a first fan within a preset time period if Tc is larger than or equal to Tu or if Tc is smaller than Td, setting a counting value as 0, and returning to the step B; and D, applying voltage Vx+2 to the first fan within a preset time period if Tu is larger than Tc and Tc is larger than or equal to Td, and simultaneously adding 1 to x which is a current counting value. By the aid of the method, a fluctuation range of temperature of the refrigerating chamber is small, and preservation capacity is improved. The invention further provides the air indirect cooling refrigerator. The refrigerator prevents humidity loss of the refrigerating chamber.

The invention belongs to the technical field of wheat and corn cultivation and particularly relates to a method for double cropping leisure plantation of wheat and corn in North China. According to a corn planting mode, the ridge width is 110-120cm, the ridge face width is 80-90cm, the furrow width is 30-40cm, the ridge height is 10-15cm, two rows of corn is planted on one ridge, wide and narrow row plantation is adopted, wide rows are 80-90cm wide, narrow rows are 30-40cm wide, and the planting distance is 10-15cm; after the corn is harvested, rotary tillage is performed on the wide rows through a strip rotary cultivator, high stubble of 35-45cm remains in the narrow rows to naturally rot and return to fields, the wide rows are ridged through a ridger, wheat is sown on the ridges through a ridge culture seeding machine, every ridge is divided into six rows for seeding, equidistant row seeding is performed, and the row space is 15-20cm; after the wheat is harvested, a corn planter is used to directly seed the corn on the ridges, and circulation is performed in a whole year. The optimized alternate leisure plantation method is adopted, reasonable water and fertilizer management, deinsectization and weeding management are adopted, all links are collaborative with each other, and the remarkable effect is achieved.

The invention discloses an online game client side resource downloading method, comprising the following steps that: step 1, the online game client resource is divided into a minimum client side and a residual resource; the client side downloads and installs the minimum client; step 2, the client side starts an online game, in a process of playing the online game, the client side senses bandwidth and downloads the residual resource through idle bandwidth; step 3, after ending the online game, the client side downloads an updating program to reside in the client, and continues to downloads the residual resource through the idle bandwidths. The method can simplify and facilitate the downloading process of clients, and can shorten time of deployment process of a game client side, so that game players still can quickly enter into the game when the client side resource is larger, and also can download the resource in the process of playing the game, thereby increasing interest of the clients to the online game, preventing client loss and attracting new clients.

The invention discloses a processing method of data consistency, which comprises the following steps: testing the consistency of differential data according to the comparing result or differential list of net data; combining synchronous rule to generate synchronous data to transmit to the relative net; executing data adding/deleting/repairing request of synchronous rule consistency at net; eliminating the consistent net data according to the eliminated data difference. The invention can clean the rubbish data of net in time, which improves the resource utility.

The invention discloses a method for preparing semi-aromatic polyamide. The method adopts low temperature of 170 DEG C to 190 DEG C for dehydration firstly, and then adopts a method for temperature-raising and prepolymerization to prepare the semi-aromatic polyamide, thus avoiding the loss of diamine and being capable of accurately controlling the molar ratio of the dicarboxylic acids and the diamine, obtaining the polyamide with high intrinsic viscosity and improving the quality of semi-aromatic polyamide. By the prepolymerization reaction, the prepolymer which is measured in 96 percent of sulphuric acid with the temperature of 25 DEG C and has the intrinsic viscosity Eta of 0.06 to 0.3dl/g can be obtained. After viscosifying reaction, the intrinsic viscosity Eta of the semi-aromatic polyamide is 0.8 to 2.5 dl/g and the melting point of the semi-aromatic polyamide is 270 to 330 DEG C; the content of terminal carboxyl group is 15 to 80 mol/t; and the content of amino-terminated group is 15 to 80 mol/t.

The invention discloses a planting method of an ecological pear. The ecological pear without pesticide residue is planted by adopting a grass culturing and intercropping mode, adopting an organic fertilizer as a main fertilizer, and using physical and trapping ways to kill insects. According to the planting method, the problems that an existing pear tree planting method is low in the land use rate, high in pesticide residue and low in fruit quality can be overcome; furthermore, the planting method is free from pesticide residue and high in fruit quality, and the land can be effectively used.

The invention discloses rhodiola rosea fermentation protoplasm cosmetic and a preparation method thereof. Efficient ingredients of the rhodiola rosea fermentation protoplasm cosmetic are supernate obtained by mixing powder of rhodiola rosea root, water and zymophyte to obtain an initial system, fermenting the initial system to obtain zymotic fluid and sterilizing and centrifuging the zymotic fluid. The zymophyte is saccharomycete. The rhodiola rosea root is subjected to whole plant fermentation by adopting the saccharomycete, all functional ingredients and activity of the plant are kept, and loss of active ingredients caused by an extracting method is avoided. Any organic reagents are not added during extraction, fermentation temperature and fermentation pH are mild, structure of plant active ingredients is not damaged, natural activity of the plant is kept, and chemical components of essence and the like are not added in the fermentation protoplasm so as to ensure the safety of products on the human body. The rhodiola rosea fermentation protoplasm cosmetic is rich in salidroside, arbutin and the like having activities of restraining tyrosinase activity and restraining melanin synthesis so as to have a relatively strong whitening function on skin and has a synergistic effect with the components in the fermentation filtrate simultaneously.

The invention provides a phytoremediation method for managing composite cadmium-lead-arsenic contaminated soil. The method comprises the following steps: step S1: selecting a cadmium-enriched castor-oil plant variety; step S2: obtaining cadmium-lead-arsenic composite contaminated soil with neutral acidity and alkalinity; step S3: planting cadmium-enriched castor-oil plants and ciliate desert-grass in an intercropping manner in the cadmium-lead-arsenic composite contaminated soil with neutral acidity and alkalinity for surviving and growth, and harvesting matured castor-oil plants at regular intervals, and carrying out step S5; step S4: harvesting the upper part of the ciliate desert-grass according to the growth height of the ciliate desert-grass, and carrying out the step S5; retaining stubble of the ciliate desert-grass on the soil surface, and carrying out the step S3; step S5: feeding the harvested and matured castor-oil plants and ciliate desert-grass to an exclusive place for concentration and carrying out innocent treatment. The invention further provides a phytoremediation method for managing cadmium contaminated soil. The phytoremediation method is suitable for managing and repairing cadmium-lead-arsenic moderately and slightly contaminated soil, and has good practical application prospect.

The invention provides an irrigation area field water-saving intelligent irrigation system, comprising: a server; a weather station connected to the server through a communication network and used to transmit irrigation area weather information to the server; irrigation data collection control terminals arranged in irrigation areas and communicated with the server through the communication network; a sprinkling irrigator; a water pump provided with a water pump electromagnetic valve arranged on the water pump to control start or stop of the water pump. The irrigation area field water-saving intelligent irrigation system can provide real-time automatic detection for the soil state of an irrigation area, proper irrigation is carried out according to the current soil state, automated intelligent irrigation is provided according to circumstances, and water is saved; labor is saved, irrigation quality is ensured, and the healthy growth of vegetation in the irrigation areas is ensured.

The invention discloses a roof greening structure which comprises a roof substrate as well as a waterproof layer, a protective layer, a drainage layer, a matrix layer and a planting layer that are arranged on the roof substrate, wherein a root separating layer is arranged between the protective layer and the drainage layer, and an earth separating layer is arranged between the drainage layer and the matrix layer. According to the roof greening structure, the root separating layer is made of PVC (polyvinyl chloride) sizing hydrophobic board, so that the root of a plant is prevented from damaging the waterproof layer; and non-woven fabrics or geotextile is paved on the drainage layer as the earth separating layer, so that earth for growing and organic medium can be prevented from erosion.

The invention provides a waterproof pavement structure and a construction method thereof. The waterproof pavement structure comprises a finishing coat, a basement layer, a water draining bedding layer and a roadbed from top to bottom, wherein a waterproof layer is arranged between the basement layer and the water draining bedding layer, the waterproof layer is naturally separated from the basement layer and the water draining bedding layer, and a permeable filter layer is arranged between the water draining bedding layer and the roadbed. The construction method of the structure comprises the step of: sequentially paving the roadbed, the permeable filter layer, the water draining bedding layer, the waterproof layer, the basement layer and the finishing layer from bottom to top. The pavement structure can effectively prevent the pavement and the road bed from the damages of road surface water and ground water, thereby prolonging the service life of the road.

A potato block cutter is characterized by comprising a frame and a cutting trough. A push plate is disposed in the rear of the cutting trough. A horizontal guide bar is fixedly connected to the back of the push plate, and the other end of the horizontal guide bar is connected with a crank-rocker mechanism. The crank-rocker is driven by a motor to drive the horizontal guide bar and the push plate to move back and forth. The horizontal guide bar penetrates a guide rail welded on the frame. A tool positioner for cutting potato blocks is vertically disposed at the front end of the cutting trough. A collection hopper is arranged above the cutting trough. A horizontal collection baffle used for preventing material from falling to the back of the push plate is fixedly connected to the top end of the push plate. The potato block cutter is simple in structure and convenient to mount. The potato block cutter has the advantages that manpower is saved, production efficiency is improved, the problem that large potato blocks cannot pass a conveyor pump during the starch production process is solved, the potato block cutter operates at low speed and is safe to use, starch block is never crushed, starch loss is avoided, and the potato block cutter is simple in structure, light in weight and convenient to move.

A remote system for accurate irrigation and fertilization is characterized by comprising a field environment monitoring system an irrigation subsystem and a remote monitoring system, wherein the field environment monitoring system and the irrigation subsystem are connected to the remote monitoring system by a bus; the field environment monitoring system can set working parameters of the field subsystem and monitor working states and can send information to the remote monitoring system; the remote monitoring system sends out a standard value of a soil moisture content needed by current plant growth as well as instruction information adapted to a current plant growth period according to data information such as the plant growth period, the soil moisture content and an EC value of a current irrigation area obtained by the environment monitoring system; and the information is sent to the irrigation subsystem via wireless communication.

The invention relates to the filed of traditional Chinese plant medicine processing technologies at the producing site, in particular to a fresh processing technology of a traditional Chinese plant medicine at the producing site. The technology comprises the following steps of: harvesting, cleaning, cutting, inactivating and drying the medicinal material, or harvesting, cleaning, cutting and drying the medicinal material. The multiple and repeated procedures of cleaning and drying the medicinal material at the producing site and cleaning, softening, cutting and drying the medicinal material at a medicine piece plant of the prior art are directly changed into the process of cleaning, cutting and drying at the producing site. Thus, the invention achieves the purposes of simplifying the processing, subsequent processing and preparing procedures of the traditional Chinese medicinal material at the producing site, saving energy consumption, reducing comprehensive production cost, ensuring medicinal material quality and increasing peasant incomes and has obvious economical and social benefits.

The invention provides a data desensitization method, device and system, and relates to the technical field of data processing. The data desensitization method comprises the following steps: at least obtaining a user role, an operation type and a data request; determining whether requested data need to be carried out with desensitization processing according to the user role and the operation type; and if the requested data need to be carried out with the desensitization processing, matching corresponding data fuzzy algorithms to carry out the desensitization processing on the requested data. The technical problems of core data leakage and loss or relatively poor readability which are easily caused due to a fact that data encryption and fuzzy processing are not considered comprehensively in the prior art are solved; and not only are the core data leakage and loss prevented, but also the readability of the data after being desensitized is improved.

The present invention discloses a cucumber drying method and device with air spray impact belonging to the technical field of food processing. The technical proposal comprises that the viscera of cucumber is removed and the cucumber is put in a steam environment of the relative humidity of 10 to 50 percent, temperature of 90 to 200 Celsius degrees, air speed of 3 to 20m/s for 5 to 40 minutes to thoroughly destroy the autoenzyme; and then the cucumber is dried under an environment of the temperature of 40 to 80 Celsius degrees and air speed of 5 to 20 m/s for 5 to 16 hours. The device comprises a steam generator (1), an automatically controlled box (2), a steam duct (3), an air circulation duct (6), a fan (7), an electric heater (8), an air duct (9), an air distribution chamber (10), a temperature and air speed sensor (11), a humidity sensor (12), a nozzle (13) and a cucumber tray (15). The cucumber dried with the present invention is characterized by no nutrition loss and the properties of saving water, energy and environmental protection and the automatic control is realized in the process.

A functional nanometer material/metal-organic framework composite is disclosed. The functional nanometer material is ferritin, carbon nano tubes or glucose oxidase. The metal-organic framework is HKUST-1. The mole ratio of the functional nanometer material to the metal-organic framework is 20-100:1. The functional nanometer material/metal-organic framework composite is provided. The functional nanometer material is uniformly dispersed in a copper hydroxide nanowire layer to enhance dispersity of the functional nanometer material, so that active sites on surfaces of the functional nanometer material are completely exposed, and the application scope of a metal-organic framework structure is broadened.

The invention relates to a pollution-free grape planting method, comprising the steps of before field planting of a grape seedling, performing different treatments on soil and a grape seedling root; paving straws on the soil, then scattering quick lime, paulownia saw dust, castor leaf powder, vinasse and other sterilization components, deeply tilling the oil and laminating a film for hard light irradiation, so germs in the soil can be effectively killed, and a well environment is provided for grape growth; dipping the root with mud prepared from nitrogen, phosphorous and potassium compound fertilizer, calcium superphosphate, urea, attapulgite, polyacrylamide, bamboo vinegar and sea mud, and then coating a layer of plant ash, wherein the mud contains the slow-release fertilizers, and water retention, so fertilizing and watering times can be effectively reduced, and the grape planting cost is reduced; after field planting, applying straw powder and vermiculite to the root, thus improving the soil, preventing the loss of the mud coated to the root of the grape and improving the use rate of the fertilizers. The pollution-free grape planting method has the beneficial effect that a safe and environment-friendly prevention and control method is adopted for preventing and controlling diseases and insect pests.

The invention discloses a movable plant wall and belongs to the technical field of indoor greening and indoor air purification. The movable plant wall is characterized in that the movable plant wall is a single-side plant wall and comprises a top plate, a left side plate and a right side plate, the left side plate and the right side plate are connected with the top plate, a water channel is formed in the bottom of the left side plate and in the bottom of the right side plate in a matching mode, four sides of a screen are connected with the top plate, the left side plate, the right side plate and the water channel in a matching mode respectively, planting bags are arranged in front of the screen in a matching mode, a fan, a spraying device and light compensation lamps are arranged on the top plate behind the screen in a matching mode, and the spraying device is connected with a water pump installed in the water channel through a water pipe. The movable plant wall has the advantages of being capable of achieving modularization assembly, convenient to move, simple in maintenance, and energy-saving. In addition, flowers and leaves will not fall off easily, air circulation of roots of plants is smooth, the survival time of the plants is long, and the greening effect and the beautifying effect are good.

The invention discloses a log and raw bamboo protective agent. The log and raw bamboo protective agent comprises a main protective agent body and a hydrophobic agent and is characterized in that the main protective agent body is composed of, by weight, 1.0-10.0 parts of fungicide and insecticide, 10-30.0 parts of water-soluble monomers and/or polymer, 0.0-5.0 parts of coloring agents and 100.0 parts of water; and the hydrophobic agent is composed of, by weight, 90.0-98.0 parts of paraffin and 2.0-10.0 parts of auxiliaries. According to application of the protective agent, the bottom of a log or the bottom of raw bamboo is erected in a tank containing the main protective agent or transversely immersed into the tank containing the main protective agent, or vacuum pressure treatment is adopted; then the log or the raw bamboo is subjected to hydrophobic drying treatment, and the log or the raw bamboo is cooled and discharged. The treated log and the raw bamboo are low in moisture content, quite remarkable in fungus, insect and cracking resistant effect, good in medicine leachability resistance, long in validity period, capable of conducting drying and coloring treatment and good in energy-saving effect.

The invention discloses a preparation method and electret equipment of a polypropylene melt-blown non-woven fabric. The preparation method includes the steps of melt-blowing production, pure water preparation, electret technology and drying technology. The preparation method has the advantages that more electrets can be generated by the aid of spunlace electret, electrodes lost in the spunlace electret process are made up, so that the non-woven fabric is better in permeability, the electrets are stable, retention time is long, adsorptivity is strong, good filtering effects can be achieved under the condition of low resistance, atomized water can be prevented from running off into a working environment by the aid of a splash-proof device, the working environment can be improved, pure waterafter puncture can be maximally recovered by the aid of a pure water recovery device, and the pure water is prevented from flowing to the outside.

The system comprises: a chooser used for choosing the information from the original contents and combining a part of chosen information to form the key encryption information; the rest part of the chosen information is combined to form the optional encrypted information which is outputted to the encryptor; an encryptor used for encrypting the key encryption information and the optional encryption information, and outputting it to the retriever; an retriever used for recovering the key encryption information and the optional encryption information to original content and sending it to the embedded digital watermarking device; the embedded digital watermarking device used for making digital watermarking embed for the original content, and outputting the original content embedded with the digital watermarking information is outputted to the decoder and other terminals. The invention also reveals a method thereof.

The invention discloses a saline land improvement system and an improvement method at the aim of solving the problems that water and fertilizers can be lost in the later improvement period and the improvement of deep saline land is not facilitated because of a conventional saline land improvement system. The saline land improvement system comprises a plurality of first salt discharge tubes and a second salt discharge tube, wherein the first salt discharge tubes are used for receiving saline water from the saline land; the second salt discharge tube is connected with the first salt discharge tubes and used for discharging the saline water; the second salt discharge tube is provided with a valve. The saline land improvement system and the improvement method disclosed by the invention have the advantages that the structure is simple, the saline land improvement effect can be rapidly taken into play, the effect is good.

The invention relates to a method for recycling waste residue in manganese industry production. The method comprises the specific following steps: (1) pre-processing filter residue; (2) adding acid and leaching; (3) carrying out filtering and solid-liquid separation on ore slurry; (4) recovering hematite powder; (5) recovering manganese carbonate concentrate; and (6) preparing a nitrogen-phosphorus compound fertilizer base material. By the method, hematite powder, manganese carbonate concentrate and the nitrogen-phosphorus compound fertilizer base material can be recovered from leached press-filtered residue, the process is simple and is easy to achieve industrialization and meanwhile, the content of the heavy metal ingredients is in completely in conformity with national associated standards, treated wastewater and waste residue are free of harmful ingredients such as heavy metals, the environmental pressure is alleviated and the method has great promotional values.

The invention discloses a semi-aromatic polyamide and a preparation method thereof. The method of the invention uses the aromatic dicarboxylic acid and aliphatic diamine containing 4 to 14 carbon atoms as the raw materials in order to prepare the semi-aromatic polyamide and acquire a new structure of the semi-aromatic polyamide. The semi-aromatic polyamide is prepared by combining high purity semi-aromatic polyamide salt so the polyamine loss is avoided and the mole ratio of the dicarboxylic acid and the diamine can be accurately controlled so as to acquire the high viscosity semi-aromatic polyamide. The monomer is purified in the salifying process, so the melting point, the crystallinity and the mechanical property of the semi-aromatic polyamide are promoted. The pre-polymerized material which has a viscosity eta ranged from 0.06 to 0.3 dl/g tested in 96% sulfuric acid at 25 DEG C by performing the pre-polymerization reaction is acquired. After the tackifying reaction is performed, the viscosity eta of the semi-aromatic aromatic polyamide is ranged from 0.8 to 2.5 dl/g, the melting point of the semi-aromatic aromatic polyamide is ranged from 270 to 330 DEG C, the content of the end carboxyl is ranged from 15 to 80 mol/t and the content of the end amino is ranged from 15 to 80 mol/t.