67results about How to "Guaranteed results" patented technology

The invention relates to a four-rotor UAV (unmanned aerial vehicle) attitude control parameter tuning method based on an improved fish swarm algorithm. Based on a standard artificial fish swarm algorithm, the invention provides a strategy for dynamically adjusting an artificial fish moving step length, an elitist preservation and reproductive behavior and an external fishing behavior are introduced, and defects of series reduction of a later convergence speed, low convergence accuracy and easy falling into local optimum of a standard artificial fish swarm algorithm in the prior art are overcome. The method can be used for solving problems of aircraft design, flight control parameter tuning and path planning and has good problem solving accuracy and efficiency.

The invention discloses a cut tobacco production batch homogenization evaluation method. Production is carried out in multiple batches in the cut tobacco production process, and in the cut tobacco production process of a single batch, tobacco leaf material sequentially goes through the steps of hot-air tobacco leaf moistening, leaf flavoring, cutting, heating and moistening of cut tobacco, cut tobacco drying and cut tobacco aromatization; each on-line index datum of each step is first acquired on line; each off-line index datum is acquired by artificial sampling inspection; each acquired datum is inputted into a quality management information system for statistical analysis, and according to a statistical analysis result, each index related to each datum is evaluated to generate a corresponding single-batch evaluation index value; according to the single-batch evaluation index value generated in the cut tobacco production process of each single batch, the quality management information system automatically generates a whole-batch cut tobacco quality evaluation report, and according to the whole-batch cut tobacco quality evaluation report, a corresponding step improvement measure is taken. The method can effectively increase the accuracy, controllability and homogenization of cut tobacco production quality process control, and the implementation of the method does not require new inspection instruments and equipment to be added.

The invention discloses a dyeing and finishing process of a coffee-yarn blended and knitted fabric. The dyeing and finishing process is characterized by comprising the following steps: preparing grey fabric, pretreating, dyeing, soaping, softening and carrying out after finishing, wherein a mild pre-treatment degreasing process is adopted; and an active double-dyeing process of firstly dyeing, dispersing and dyeing is adopted to dye, so that the difficulty in dying with the same color of the blended and knitted fibers is solved; through control on a finishing agent and the amount of the finishing agent in the after finishing process of the coffee-yarn blended and knitted fabric, the problems of same color and different colors in the dyeing process of the coffee-yarn blended and knitted fabric are solved; good air permeability and relatively good rubbing fastness are obtained; and meanwhile, a plurality of efficacies that the coffee-yarn blended and knitted fabric is capable of absorbing stink, removing an odor, storing heat, keeping warm, absorbing moisture and drying quickly in an far infrared manner are taken into account.

The invention notably relates to a computer-implemented method for compressing data. The data is partitioned into clusters of pieces of data resulting from K-means clustering. Each cluster has a centroid. The method comprises applying (S10) a compression scheme to the data. The compression scheme preserves the centroid of each cluster and reduces the variance of each cluster. The method also comprises rescaling (S20) the data by moving the pieces of data towards the centroid of their cluster. Such a method improves the compression of data partitioned into clusters.

The present invention provides an attendance management method and system. The method comprises that a. a scheduling table is set, staff attendance information is collected, and the attendance information is uploaded to a server, wherein the attendance information comprises identity information, fingerprint information and scheduling information; b. according to the attendance information, the server collects statistics of the actual work record of staff, and dynamically assigns experimental test tasks through the fingerprint attendance condition of the test staff and the experiment workload; and c. the actual salary of the staff is automatically obtained by matching a pre-established salary system with the actual work record. According to the attendance management method and system provided by the present invention, a digital experiment and digital management platform is established, so that on one hand, assignment of experimental test tasks can be facilitated, efficiency in the experiment process can be improved, and the progress and result of the overall experiment can be ensured, and one the other hand, standardized management to the staff can be facilitated, and the salary system is combined, so that the cost of manual accounting is reduced, and the efficiency of the enterprise is improved.

The invention provides a sound source imaging method based on a microphone array, and the method comprises the following steps: S1, forming a multi-channel microphone array through a multi-arm spiral array, and enabling the number of channels to be N; S2, collecting original audio data of N channels through a microphone array; S3, performing phase correction on the original audio data; S4, processing the corrected audio data to obtain a complex matrix R '; S5, determining coordinates of each point on the scanning surface according to the coordinates of the microphone array; S6, calculating a guide vector from the scanning surface to the array surface, and obtaining a sound source intensity distribution diagram of the scanning surface according to the cross-spectrum matrix R; and S7, carrying out superposition processing on the sound source intensity distribution diagram and the video image to obtain a real-time acoustic imaging diagram. The problem that the positioning result of the existing sound source positioning method is easily interfered by external factors is solved through audio data correction and video superposition.

The invention discloses a parasitic wasp natural enemy release device which comprises a cup body and an outer cover; particularly, natural enemy release holes are formed in the outer cover; an inner cover with air holes is arranged in the cup body; the bottom end of an operating pipe is fixedly connected with the inner cover; the upper end of the operating pipe penetrates through the outer cover, and the operating pipe is closed by an operating cover; a rubber ring sleeves the upper end of the operating pipe for positioning. The device is simple in structure and convenient to use. The invention further provides a parasitic wasp natural enemy sustained release method which comprises the following steps: (1) allowing parasitic wasps to parasitize stored-grain moth larvae, and serving the parasitized stored-grain moth larvae as hosts; (2) connecting the outer cover with the cup body to ensure that the inner cover is clamped on the inner wall of the cup body, putting the hosts in the cup body through the operating pipe, and closing the operating cover to enable the device to be a natural enemy storage device; (3) within 15 days since wasp receiving, pulling up the operating pipe to ensure that a wasp outlet passage is formed in the cup body, carrying out positioning through the rubber ring, putting fodder into the cup body through the operating pipe, and closing the operating pipe, so that the device can be placed in a control area for biological control. Through adoption of the device and the method, parasitic wasp natural enemies can be sustainably released to the control area to achieve long-term and effective biological control.

The invention provides a method for arranging an operational project sequence, which comprises the following steps of: determining mutual dependency relationship among a plurality of operational projects in a project and obtaining an oriented graph according to the dependency relationship; determining whether the oriented graph is an oriented acyclic graph or not, and if so, using a topological sorting method for carrying topological sorting to the oriented acyclic graph; and arranging a sequence among a plurality of operational projects after the topological sorting into a sequence among a plurality of operational projects in the project. The invention also provides a device for arranging the operational project sequence. According to the method and the device for arranging the operational project sequence, the problem of miscalculation which is further caused by closed-loop logical relationship in a plurality of operational projects during the process of system setting can be effectively avoided; and by adopting the method, the invention can obtain the operational project sequence correctly.

The invention relates to a selenium enrichment camellia oleifera tree interplanting method which refers to the method for jointly planting vetch and camellia oleifera trees in a mountain slope forest land. The method specifically comprises the steps that the mountain slope forest land is transformed through improved soil rich in organic selenium, land preparing, planting, pruning and fertilizer applying are carried out, survival sustaining is carried out in the first year of the camellia oleifera trees, and lower-concentration fertilizer pouring and complete flower thinning need to be carried out; sound seedlings are sustained in the second year, and accelerating nitrogen fertilizer needs to the applied before shoots bud; yield maintaining is carried out in the third year and the years afterwards, and the application amount of organizer fertilizer and phosphorus-potassium fertilizer needs to the increased. By means of the interplanting the camellia oleifera trees, the high yield of a single camellia oleifera tree can be achieved, and the economic benefits of agriculture and forestry planting can be improved.

The invention relates to a dynamic multi-selection-region division method based on an FPGA (field programmable gate array) analytical layout solver. The dynamic multi-selection-region division method comprises the following steps: constructing a first cost function based on connection relations between all basic units, forming LEs (logic elements), in a netlist, and calculating first coordinate values of all the LEs in a chip layout; determining a plurality of overlapped regions of the LEs in a chip, and finding out legal region ranges for the overlapped regions respectively; performing recursive secondary division on the overlapped regions in parallel; applying tension respectively to the LEs in the overlapped regions subjected to secondary division to pull the LEs in all the overlapped regions away; constructing a second cost function based on the connection relations between all the basic units of all the pulled-away LEs, and generating second coordinate values of all the LEs; continuously determining overlapped regions, finding out legal region ranges for the overlapped regions, and carrying out iteration to generate Nth coordinate values of the LEs until the Nth coordinate values are legal layout solutions of the LEs. According to the dynamic multi-selection-region division method, the parallel secondary division speed is high, and the calculation speed is greatly increased.

The invention provides an intelligent setting method for unmanned aerial vehicle attitude control parameters based on a quantum firefly algorithm, and belongs to the field of automatic control. The method comprises the steps of building an unmanned aerial vehicle attitude motion model, designing a fractional order PID controller, determining a to-be-set parameter, and selecting an error index function as an objective function; setting parameters of the quantum firefly algorithm; executing the quantum firefly algorithm to perform controller parameter setting optimization, and obtaining the optimal controller parameter and the objective function value of the current setting; judging whether the objective function value meets requirements or not; if the objective function value meets the requirement, determining that the firefly position is the optimal attitude controller parameter, and ending the setting; otherwise, returning to the step 2, resetting the parameters of the quantum fireflyalgorithm, and executing the steps 2-4. According to the method, on the basis of a standard firefly algorithm, improvement is carried out by utilizing a quantum theory, elite retention and mutation behaviors, and the defects that the later convergence speed of the standard firefly algorithm is seriously reduced, the convergence precision is not high, and local optimum is likely to happen in the prior art are overcome.

The invention discloses a method and a system for updating software client sides in a monopoly mode. The method includes firstly, generating verification codes corresponding to objective version numbers, and writing the objective version numbers and the verification codes into verification code lists; secondly, reading the objective version numbers, objective verification codes corresponding to the objective version numbers, original version numbers and original verification codes corresponding to the original version numbers from the verification code lists, and writing read content and updated files into updating packages; during updating, updating the client sides by comparing the original version numbers and the original verification codes. During the whole updating process, updating success is determined by the verification codes due to the fact that different servers generate different verification codes, so that the updating process ensures that updating of the software client sides can be only performed by same servers, and further, uniformity of updated programs and operational results thereof are guaranteed.

The invention discloses equipment for automatically welding a vacuum corrugated pipe. According to a fixture for automatically welding the corrugated pipe, a round fixture fixing base is adopted; 12 equant round holes are formed in the round fixture fixing base; a fixed baffle plate is arranged between any two adjacent round holes; proximity switches are respectively arranged on two sides of eachfixed baffle plate along a circumferential direction; an air exhaust hole is formed in the round fixture fixing base, and a hollow shaft is arranged in the center of the round fixture fixing base; anair cylinder is fixed on the base on the side face of the hollow shaft; a baffle plate is arranged on a main shaft of the air cylinder; a stepping motor is fixed on the baffle plate; one end of a link rod is connected with a main shaft of the motor, and the other end of the link rod is connected with a welding pen sleeve; a welding pen is vertically arranged in the welding pen sleeve; one end of a power line and one end of an air source line are introduced from the hollow shaft, and are connected with the stepping motor and the air cylinder respectively; and the other end of the power line and the other end of the air source line are connected with an air pump and a programmable logic controller (PLC) respectively. According to the equipment, the shortcomings of low welding precision, complicated operation, high time consumption, low efficiency and high equipment abrasion during manual welding of the corrugated pipe and the shortcoming that the welding quality and the welding speed are limited by the technical level of operators are overcome.

The invention relates to an application method of an electronic fence, a judgment and verification process between a client and an electronic fence condition rises to be carried out at the server side, and the server side judges and verifies whether the client meets the electronic fence condition, on the one hand, the operational capability of the client is cancelled, so that the operating efficiency of the whole electronic fence is higher; secondly, the judgment and verification process rises to the server side, so that accuracy and justice of a result are guaranteed; thirdly, the judgment and verification process rises to the server side, so that the influence of a network on a process of transferring the electronic fence condition to a lower level by the server side is avoided, and thus the whole electronic fence has more stable and efficient operation; and fourthly, the judgment and verification process rises to the server side so as to be effectively convenient for future maintenance of the electronic fence.

The invention relates to a method for interplanting of camellia oleifera trees, in particular to a method for combined planting of osmunda japonica thunb and camellia oleifera at hillsides and forests. The method specifically comprises the following steps of land preparation, transplanting, trimming and fertilizer applying. In the first year, the survival maintaining of the camellia oleifera tree is performed, and a low-concentration fertilizer is applied to flower thinning is carried out entirely; in the second year, the strong seedling maintaining is performed, and a nitrogen fertilizer needs to be applied before germinating of new tips; in the third year and later, the output maintaining is performed, and the applying amounts of an organic fertilizer and a phosphate and potassium fertilizer need to be increased. The method has the advantage that when the camellia oleifera trees are interplanted, the output of the single camellia oleifera tree is high, and the economic benefit of the farmland and forest planting is improved.

The invention especially relates to a method for rejuvenating aging fruit bearing jujube trees without influencing normal fruit bearing. The method comprises following steps: (1) when jujube trees enter aging fruit bearing stage, purposive new branch cultivation is performed on main branches and fruit bearing groups; (2) renewing is performed as well as fruit bearing on the main branches, side branches and fruit bearing branch group of jujube trees which have already entered aging fruit bearing stage and whose output per plant is under 7.5 kg; (3) new main branches are renewed and cultivated for 3 to 5 years; (4) band girdling is performed after the jujube trees enter full flowering stage; (5) pinching is performed on newly cultivated newborn jujube heads according to the growth condition from early July to early August for enhancing the thickening and lengthening growth of second shoots on the jujube heads; (6) base part branch drawing is performed on newborn jujube heads according to growth part and growth space in the middle and late August. The method of the invention solves the problem that girdling tree protecting without output adopting renewing such as light renewing, middle renewing or heavy renewing so that the purpose of continuous high yield is fulfilled.

A contamination-free bacterium culture device for a clinical lab comprises a box body. The upper portion of the box body is opened. A top cover is hinged to the top face of the box body. The bottom face of the top cover can make contact with and be matched with the top face of the box body. A cylinder is arranged in the box body. The upper portion of the cylinder is opened. A culture dish can be placed in the cylinder. The periphery of the culture dish can make contact with and be matched with the cylinder. A plurality of parallel bearing inner rings are fixedly connected with the periphery ofthe cylinder. Bearing outer rings are fixedly connected with the inner wall of the box body. By pushing a U-shaped rod, a vertical rod can be kept still, and oxygen injection is avoided; bacterium cells in the culture dish can float up by means of a pure mechanical structure, no energy is consumed, and energy conservation and environment protection are better achieved; the culture dish does not make contact with the external environment in the period, the cultured bacterium cells are prevented from being affected by the external environment, and the culture result accuracy is ensured; duringbacterium culture of the clinical lab, operation is flexible, use is convenient, the burdens of medical staff can be relieved, and the contamination-free bacterium culture device is suitable for use and popularization.

This invention is best described as a human body fat disintegrator device which is conformed by a semi-rectangular frame with a handle on one end and a grip on the other, as well as a series of round profile teeth, located perpendicularly, and alternately, across the frame's upper face, and a series of sharp profile teeth located at the frame's lower face. The description of this invention also outlines a method for eliminating fat from the human body, consisting of holding the above described human body fat disintegrator device by the handle and grip; then positioning either of the device's toothed surface over the designated area, applying such pressure as not to harm the user; and sliding or dragging the device over the designated area with a backward and forward motion on the device's longitudinal direction for 10 to 15 seconds, alternating massage on different parts of the body, as required.

The invention provides an adaptive protocol sampling method and an adaptive protocol sampling device. The method comprises the following steps of presetting a transmission protocol priority according to a transmission protocol type distribution used by virus transmission, wherein each priority corresponds to one priority list; detecting performance parameters of a sampling device and determining a sampling width; receiving and parsing a data packet and obtaining the transmission protocol type of the data packet; determining the priority of the data packet, and determining a sampling rate of the data packet according to the corresponding priority list and sampling width; collecting data in the data packet according to the sampling rate; and sending the collected data to the data processing part. The device comprises a configuration unit, a detecting unit, a data receiving unit, an analysis unit, a data collecting unit and a sending unit. According to the method and the device provided by the invention, when massive data are processed, the priority is determined through the protocol type, and the data with a low degree of importance are abandoned, so that both the equipment performance and result of handling can be ensured.

The invention discloses a method and system for obtaining the maximum concurrent connection number of a firewall, capable of accurately testing the maximum concurrent connection number of the firewall, simplifying a step of testing the maximum concurrent connection number of the firewall, increasing the performance testing efficiency of the firewall and reducing the cost. The method comprises the following steps: S1, obtaining the current total connection number n1 of the firewall and the size c1 of a used memory; S2, obtaining the total connection number n2 of the firewall and the size c2 of the used memory after a pre-set time; S3, judging whether n1=n2 is workable or not, if so, returning to the step S1, and or else, performing a step S4; and S4, calculating the maximum concurrent connection number N of the firewall, wherein the calculation formula is N=n2+(c-c2)*(n2-n1) / (c2-c1); and c is the memory capacity of the firewall.

The invention relates to the technical field of agricultural monitoring, and discloses a 5G-based intelligent agricultural environment parameter monitoring system. The system comprises a base, a first measuring rod, an atmospheric sensor, a guide rail, a lifting rod, a second measuring rod, a soil sensor and a sharp anchor. The invention further discloses a 5G-based intelligent agricultural environment parameter monitoring method. The method comprises the steps of S1 arriving at a designated position; S2 acquiring atmospheric environment parameters of the designated position; S3 enabling the second measuring rod to enter the soil layer at the designated position; S4 acquiring soil environment parameters of the soil layer; and S5 uploading the atmospheric environment parameters and the soil environment parameters to an upper computer through a single-chip microcomputer. According to the invention, the atmospheric environment parameters and the soil environment parameters can be measured at the same time, agricultural environment parameter monitoring data are enriched, the agricultural environment is evaluated more comprehensively, more refined agricultural production activities are carried out, the effect of agricultural production is ensured, and the yield and quality of crops are improved.

The invention relates to a 3D weld seam scanning system based on weld seam 3D shape detection. The 3D weld seam scanning system comprises a welding robot. The welding robot comprises a welding gun anda camera. The welding robot is connected with a master control module. The master control module is used for receiving and analyzing images shot by the camera and transmitting an instruction to the welding gun. The master control module determines the material of a welding rod in a first weld seam area and then determining the welding mode and the weld seam standard of the first weld seam area according to the materials of a first workpiece to be welded and a second workpiece to be welded. Different welding modes and weld seam standards correspond to the preset weld seam shape. By comparing and judging the width difference value zk and the height difference value zh formed according to the actual weld seam shape of the first weld seam area and the preset weld seam shape, the material of awelding rod and the welding mode in a next weld seam area are adjusted, so that the actual weld seam shape of the weld seam area is in line with the preset shape.

The invention discloses a prevention and treatment method of apple tree virus diseases. When apples start to germinate, branches of apple trees are smeared with mixed disinfectant once every 5-7 days for 2-4 times continuously in total, wherein the smearing range includes the branches which are 150 cm high or below. The mixed disinfectant is prepared from, by weight, 12-18 parts of ribavirin injection, 8-12 parts of vitamin C, 8-12 parts of zinc sulfate, 12-18 parts of calcium nitrate, 8-12 parts of potassium sulphate, 25-35 parts of brown sugar, 0.5-2 parts of organosilicon compound and 2400-3600 parts of water. The symptoms of diseased plants can be rapidly eliminated after about three times of smearing, the normal fruiting of the fruit trees at the current year can be ensured, and economic loss is avoided.

The invention discloses an undergraduate formula car automatic gear shifting system. The system comprises a control device and an execution device; the control device comprises an ECU, a controller and a sensor; the execution device comprises a gear shifting steering engine, a clutch steering engine and a transmission mechanism; the transmission mechanism comprises a gear shifting transmission mechanism and a clutch transmission mechanism; the gear shifting transmission mechanism comprises an L-shaped driven rod, a middle connecting rod and a steering engine rocking arm; the clutch transmission mechanism comprises a steering disc and a steel wire rope; the gear shifting steering engine and the clutch steering engine are connected with the controller through circuits; the gear shifting steering engine and the steering engine rocking arm are connected through a spline; the L-shaped driven rod and the steering engine rocking arm are connected through the middle connecting rod; the middleconnecting rod is hinged with the L-shaped driven rod and the steering engine rocking arm through bolts and nuts; the L-shaped driven rod and the gear shifting shaft are connected through inner and outer splines; and the steering disc and the clutching steering engine are connected through inner and outer splines. The system has the characteristics of low weight, high integration degree, high automation degree and the like.

The invention provides a drive test trajectory map display method and device. The method comprises: a target drive test trajectory is obtained; the target drive test trajectory is simplified; and thesimplified target drive test trajectory is displayed on a preset electronic map interface. Therefore, the data volume of the drive test trajectory is reduced substantially; the display efficiency of the foreground drive test trajectory map and the usage smoothness of the user are improved; the features of the drive test trajectory are protected from being lost; and thus line feature unique and result unique principles of the drive test trajectory are ensured.

The present invention provides a method for soil improving in red loquat planting process, and relates to the field of agricultural planting, the method includes the steps of land selection, land preliminary treatment and soil improvement, and a soil conditioner comprising the raw materials of 150-200 parts by weight of domestic sludge water, 30-40 parts by weight of crop straws, 10-20 parts by weight of livestock manure, 5-8 parts by weight of vinasse, 1-2 parts by weight of Hydromica, 1-2 parts by weight of probiotics and 0.5-1 part by weight of a composite modifier to complete the soil improvement. The domestic sludge water, the crop straws, the livestock manure, the vinasse and other cheap waste raw materials are used as the main materials of the soil conditioner, animals are used forsludge treatment, useless domestic sludge is converted into a beneficial pure natural organic fertilizer by the ecosystem in the body of the animals, side effects can be avoided, the probiotics and the composite modifier are added for catalysis of the soil improvement, the soil conditioner used in the soil improvement has higher efficiency, and results can be guaranteed.

The invention discloses wastewater treatment and discharge equipment capable of uniformly pouring chemical agents. The wastewater treatment and discharge equipment comprises a box body, wherein a treatment cavity is formed in the box body; six groups of inner water pipes with openings facing the treatment cavity are symmetrically and uniformly arranged on the front and rear end walls of the treatment cavity left and right; the end wall, away from the treatment cavity, of the inner water pipe is provided with a through-plugging block sliding groove; a through-plugging block is connected in thethrough-plugging block sliding groove in a sliding manner; a communicating pipe communicating left and right is arranged in the through-plugging block; an outer water pipe with an opening back to thetreatment cavity and leading to the outside is arranged on the end wall, away from the treatment cavity, of the through-plugging block sliding groove; the communicating pipe can communicate the innerwater pipe with the outer water pipe; a precipitate collecting mechanism is arranged at the top of the treatment cavity; six diffusion hoppers with downward hopper openings are evenly arranged on theleft side and the right side of the top end of the treatment cavity, sliding pipes are fixedly arranged at the top ends of the diffusion hoppers, agent falling grooves with downward openings are formed in the sliding pipes, quantitative chemical agents can be evenly poured in the wastewater treatment process of the chemical precipitation method, and precipitates obtained after reaction can be collected and treated in time.

The invention relates an analysis and detection method for 7-fluoro-4-hydroxyquinazoline. The analysis and detection method is used for quality control of 7-fluoro-4-hydroxyquinazoline and carries out high-performance liquid chromatographic analysis and detection under the conditions that a chromatographic column (C18, 4.6*250 mm, 3[mu]m) is packed with octadecylsilane bonded silica gel; an aqueous phosphoric acid solution with a concentration of 0.05-0.15% and acetonitrile are used as mobile phases; gradientelution is carried out; detection wavelength is 247 nm; and column temperature is 25 to 35 DEG C. The analysis and detection method can effectively separate 7-fluoro-4-hydroxyquinazoline from impurities and has the advantages of high resolution and sensitivity, good repeatability and durability, short analysis time, simple operation and stable and reliable results.

The invention discloses a three-dimensional scanning modeling system for non-standard parts, and relates to the technical field of paint spraying. The three-dimensional scanning modeling system for the non-standard part comprises applying a particle swarm algorithm to point cloud data, performing kernel density estimation on the optimal broadband, carrying out mean shift algorithm operation on thedensity function; removing outliers, performing weighted principal component analysis operation on the preprocessed point cloud data; performing operation of a three-dimensional contour surface extraction algorithm on the secondary processing point cloud data; carrying out contour surface extraction, component construction and optimization; obtaining a three-dimensional digital analog, carrying out first point cloud data processing through combination of a particle swarm algorithm and a mean shift algorithm; and then carrying out second point cloud data analysis through weighted principal component analysis, so as to enable a formed file to be more accurate and practical. Point cloud data obtained through scanning is directly utilized to form a digital model, establishment of a frameworkis avoided, a modeling process is simplified, a processing result is ensured, and doping of external impurities is avoided.