115 results about "Poor mobility" patented technology

An omni-directional robot cleaner, composed of a platform and a plurality of driving units for driving and controlling the movement of the platform, in which the platform further comprises: a sensing unit, for obstacle detection; a cleaning unit, for collecting and removing dust and dirt; a processing unit, capable of receiving signals transmitted from the sensing unit while planning and mapping a travel path accordingly; and a power unit, for providing power to the omni-directional robot cleaner while managing the same. Moreover, each driving unit of the plural driving units is comprised of an omni-directional wheel and an actuator for driving the corresponding omni-directional wheel to rotate omni-directionally, by which the platform is enabled to move continuously while changing its moving direction simultaneously so as to free the robotic cleaner from the shortcomings of those conventional autonomous cleaner, such as poor maneuverability, poor mobility and insufficient degree-of-freedom regarding to the driving of the cleaner. Therefore, not only the operation mobility of the robotic cleaner is enhanced, but also the moving agility of the same is greatly improved.

An omni-directional robot cleaner, composed of a platform and a plurality of driving units for driving and controlling the movement of the platform, in which the platform further comprises: a sensing unit, for obstacle detection; a-cleaning unit, for collecting and removing dust and dirt; a processing unit, capable of receiving signals transmitted from the sensing unit while planning and mapping a travel path accordingly; and a power unit, for providing power to the omni-directional robot cleaner while managing the same. Moreover, each driving unit of the plural driving units is comprised of an omni-directional wheel and an actuator for driving the corresponding omni-directional wheel to rotate omni-directionally, by which the platform is enabled to move continuously while changing its moving direction simultaneously so as to free the robotic cleaner from the shortcomings of those conventional autonomous cleaner, such as poor maneuverability, poor mobility and insufficient degree-of-freedom regarding to the driving of the cleaner. Therefore, not only the operation mobility of the robotic cleaner is enhanced, but also the moving agility of the same is greatly improved.

The embodiment of the invention relates to the technical field of wireless communication, in particular to a method, system and equipment for establishing services, and aims to solve the problem that in an E-UTRAN structure in the prior art, when UE makes a service call or receives paging from a network side, poor mobility frequently occurs. The method includes the steps that after the UE makes the service call or receives the paging from the network side, it is determined that RRC connection is established on a macro base station; all DRBs of a control plane are kept on the macro base station, and part or all of layers corresponding to part or all of DRBs on a user plane are switched to be on at least one local base station. When the UE makes the service call or receives the paging from the network side in the E-UTRAN architecture, the number of times of poor mobility such as RRC connection interrupt, loss of switchover information and synchronous failures from the UE to target access points is reduced.

The present invention discloses playing stream media caption method for solving poor mobility and dynamic state controllability in current technology. It contains respectively requesting stream media services and said stream media corresponded caption service to stream media server and caption server, said stream media server and caption server respectively transmitting media stream and caption stream to stream media playing unit, said stream media playing unit judging whether caption stream time stamping matched with media stream time stamping, converting at least time stamping matched caption stream into video stream and synchronous playing with said media stream.

The present invention belongs to the technical field of 3D printing materials, and relates to a 3D printing gypsum ink, and the 3D printing gypsum ink is prepared from the following components by weight: 60% to 93% of gypsum powder, 2% to 20% of filler, 4% to 18% of a modifying solvent and 0.5% to 5% of a coagulant. The present invention also discloses a preparation method of the 3D printing gypsum ink, and all the raw materials are mixed and stirred evenly to obtain the 3D printing gypsum ink. The problems of low strength, poor mobility, coarse particles, poor toughness and high cost in the prior art can be solved, and an economical 3D printing forming material with industrial potential, high speed, good precision and low use cost is developed.

The present invention discloses a method for processing fine powder of traditional Chinese medicinal materials, wherein the dried net medicine is firstly pulverized into coarse powder and crushed power by a universal crusher and then the coarse powder and the crushed is processed into an ultrafine pulverizer to become fine powder. The method comprises the following advantages: the medicine dissolves more active ingredients, the dissolution rate is good, the absorption is easy, the use amount of the Chinese herbal medicine is saved, and it can be brewed with warm water repeatedly as tea, or directly added to the cooked liquid to take which avoid the trouble to decoction. The invention also provides a method for processing fine powder particles of Chinese medicinal materials. it directly pressed the fine power which produced by ultrafine pulverization into fine particles. The method overcomes the shortcoming of ultra-fineness, poor mobility and inconvenience packaging after the process of ultrafine. it increases the stability of the fine powder, moisture resistance, and become more conducive to storage, without affecting the active ingredients' leaching, it also helps to improve effective utilization rate of traditional Chinese medicine resources.

The invention provides a dry-process pre-impregnating process of a thermoplastic resin based pre-impregnated tape. The dry-process pre-impregnating process mainly comprises the following steps: chopping reinforced fibers on a creel, enabling fibers to be quantitatively scattered on a conveyer belt paved with a resin film in a freely-falling and messy mode, and laying one resin film on the chopped fiber layer for form a three-layer premix material structure; carrying out pre-needling and web fixation to double sides of the premix material structure, utilizing the composite needle punching technology to enable fiber webs to be intertwined to form a three-dimensional structure; and finally, carrying out hot-baking plasticizing and molten rolling impregnation technology to prepare the continuous short fiber pre-impregnated tape. According to the production process route, technical equipment for the traditional dry-process air laying or carding is removed, the original production process flow is improved technically, and the process technical bottleneck that the high-temperature high-viscosity thermoplastic resin has difficulty in melting and impregnating the fibers due to poor mobility is solved, the quality and the yield of the products are improved, and the industrial production cost is reduced.

A method of mobility management with smart measurement is proposed. The present invention addresses modifications on RRM measurements as well as mobility control procedures in order to improve mobility performance for UE configured with longer connected mode DRX cycle. Since the poor mobility performance when applying extended DRX cycle mainly results from reduced number of measurements, one solution is to dynamically adjust the measurement interval so as to trigger the measurement reporting in time.

The invention discloses an airflow atomizer, which comprises a spray gun and a supporting pipe, wherein the spray gun is provided with at least four superposed nozzles, the nozzle in the center is a liquid nozzle which is provided with a liquid hole, the other nozzles are gas nozzles, the front part of the cavity of each gas nozzle is an atomization area, the lower part of the column of the liquid nozzle is inwards shrunk to form an annular clearance, and the lower parts of the columns of the other gas nozzles except the outermost gas nozzle are inwards shrunk to form annular clearances; the outer wall of the upper part of the column of the liquid nozzle is provided with a plurality of uniformly distributed spiral grooves passing through the front atomization area and the rear annular clearance, and the outer walls of the upper parts of the columns of the other gas nozzles except the outermost gas nozzle are provided with a plurality of uniformly distributed spiral grooves passing through the front atomization areas and the rear annular clearances respectively; and the spiral directions of the spiral grooves on the inner and outer adjacent nozzles are opposite. The airflow atomizer has strong atomization capacity, and can adapt to the atomization of silk-like split liquid with poor mobility and high viscosity.

The invention discloses an all-dimensional kinematic drawing desk which effectively solves the problems of insufficient height, poor mobility and non-adjustability of an existing drawing desk in conventional design. The all-dimensional kinematic drawing desk comprises a desk plate, a third plate, a locking device, a supporting rod, an arc plate, an angle adjusting device, a second plate, a first plate, a height fine-adjustment device and desk legs. Different requirements of students in drawing can be met, drawing of the students is facilitated, drawing time is shortened, and drawing efficiency is improved. The sitting posture of the students can conform to human engineering principle during drawing, the students cannot rapidly feel tired in long-time drawing operation, and the physical state of the students is protected.

The invention relates to an electroosmotic dehydration method and device for a material containing water. Through the interactive plural configuration of a cathode frame and an anode, a larger electrode area can be configured by virtue of a smaller floor area, and two sides of a cathode are not provided with a filter cloth, thus the electrodes are convenient to arrange and move, and simultaneously the material containing water with poor mobility similar to that of a pasty material, such as sewage mud after dehydration by virtue of a belt-type pressure filter can adapt; the moving power for the movement of the electrodes is not transferred by a material between the electrodes because of a tilt rod connecting mechanism between the electrodes, but the moving power is transferred to the tilt rod from oil pressure or a motor, and the tilt rod transfers the moving power to the electrodes for moving, thus the move of the electrodes and accurate control of the distance between the electrodes can be realized; and the material containing water storage tank and the compression of the material containing water based on air pressure enable the uniform loading of the material containing water to be possible. High dry dehydration of the compact, efficient and stable material containing water is realized by the electroosmotic dehydration device provided by the invention.

The invention discloses a preparation method of instant pumpkin powder. Fresh pumpkins are used as raw materials and the preparation method comprises the steps of selecting and sorting, carrying out pretreatment, crushing, cooking, pulping, performing first enzymolysis by use of cellulose and amylase, performing second enzymolysis by use of pectinase, adding with modifying agents, carrying out UHT (Ultra High Temperature) sterilization and drying. According to the preparation method, the two-step enzymolysis process is adopted to solve the technical problem that the pumpkin pulp has poor mobility, most of celluloses and colloids in the raw pulp can be decomposed, the contents of the nutritional ingredients are increased, and the instant pumpkin powder has high yield, fine mouthfeel and rich nutrition.

The invention relates to a movable water loss and soil erosion laboratory which comprises a power and movable towing vehicle (2), a variable slope experimental groove (3), a down-spraying type sprinkler (4), a water supply system (5) and a water loss and soil erosion observation system (6); wherein, the power and movable towing vehicle (2) comprises a power towing vehicle (7), a mobile generator (8) and an external power source (9), and the power towing vehicle (7) comprises a driving cab (47), a carriage (22) and an experimental control room (38) positioned between the driving cab (47) and the carriage (22); the mobile generator (8) and the external power source (9) are positioned on the power towing vehicle (7). The invention overcomes the defects of poor mobility, complicated control as well as time-wasting and labor-wasting experiments of various field water loss and soil erosion experimental methods and experimental facilities. The movable water loss and soil erosion laboratory can be conveniently moved in various field experimental sites, and an observing and controlling system can be used for adjusting and controlling the rainfall intensity and the variable slope experimental groove, thus the use and the operation are convenient, and the observing and controlling accuracy can be high.

The present invention provides an offloading method and device for enhancing mobility, used for solving the technical problem of poor mobility in the current offloading and network construction solution. The present invention discloses that: a Network Address Translating (NAT) gateway is deployed in an upper layer of a Femto Node B; a dedicated tunnel for transmitting the offloading data between the Femto Node B and the NAT gateway is established; the NAT translation of the offloading data message is performed by the NAT gateway and the offloading data is forwarded through the dedicated tunnel according to a continuation relationship; when a User Equipment (UE) performs a handover across two Femto Node B's due to mobility, it is only necessary to modify the continuation relationship of the UE, without disconnecting and reconnecting the link of the offloading data stream, thereby improving the system's mobility.

The invention discloses a method for restoring high-arsenic-content underground water through iron-modified biochar, and belongs to the technical field of underground water restoring. The method comprises the following steps of S1, preparing iron-modified biomass; S2, conducting high-temperature thermal cracking on the iron-modified biomass to obtain an iron-modified biochar material; S3, puttingthe iron-modified biochar material obtained in S2 into the high-arsenic-content underground water to remove arsenic in the underground water; S4, separating the iron-modified biochar material to whicharsenic is fixed out of the water. By means of the method, through the combined effect of iron and biochar, firstly, trivalent arsenic in the high-arsenic-content underground water is oxidized into pentavalent arsenic with lower toxicity and poorer mobility, then arsenic in the underground water is removed through adsorption, complexation, coprecipitation and other modes, the removal efficiency is high, the procedure is simple, the work amount is small, and the method is convenient and easy to operate.

The invention discloses a coal blending and coking method with low-flow, high-expansion and low-shrinkage-degree coking coal involved. The method comprises the following steps that 1), the coal blending structure and the proportion are determined; 2), various types of single coking coal are dried, water in all types of the single coking coal is controlled to be 2.0-5.0%, and the bulk specific weight of the blended coal is 800 kg / m<3>-950 kg / m<3>; 3), the coking coal enters a coke oven, and coal blending and coking are carried out. According to the method, the low-flow, high-expansion and low-shrinkage-degree coking coal is used as fat coal, after the coal types and the proportion of other types of the single coking coal are selected and determined, the bulk specific weight of the blended coal is increased by reducing the amount of the water in all the single coking coal, and the defect that due to poor mobility, the low-flow, high-expansion and low-shrinkage-degree coking coal can not be combined with other coal easily and fully in the expanding process of the plastic mass can be overcome; the strength of the combination with other coking coal is improved remarkably, the thermal performance of coke is obviously improved, and the blending effect of the high-quality fat coal can be achieved.

The invention relates to the field of packaging machines and in particular relates to a big-bag powder packaging machine for filling powder materials. The packaging machine has a simple structure, and is accurate in filling and convenient to use. The big-bag powder packaging machine comprises a frame assembly, wherein a feeding assembly and a bag holder assembly are arranged on the frame assembly; and the feeding assembly is a screw feeding assembly consisting of a large screw and a small screw, wherein the large screw and the small screw are respectively provided with a feeding drive device, and are used for quickly feeding and controlling the feeding amount. The big-bag powder packaging machine can perform automatic feeding, automatic weighing and automatic bag removing on powder materials with poor mobility, has a reasonable structure and reliable performances, and is simple and convenient to operate.

The invention belongs to the technical field of communication and provides a method and device for aligning directional antennas, a terminal device, and a medium. The method comprises steps of: acquiring the first geographic location information of a local device, and receiving the second geographic location information of a peer device; calculating a distance value between a first directional antenna and a second directional antenna based on the first geographic location information and the second geographic location information; determining, according to the distance value, first angle information and second angle information that are required to be satisfied by the first directional antenna and the second directional antenna respectively under a tracking aligning condition; rotating thefirst directional antenna n based on the first angle information, and transmitting the second angle information to the peer device, so that the peer device rotates the second directional antenna based on the second angle information. The method overcomes the poor mobility and flexibility of the directional antennas, and is suitable for an application scenario with high mobility requirements, thereby ensuring a relatively stable communication effect between a unmanned ship and a shore base.

The invention discloses an imatinib mesylate tablet. The imatinib mesylate tablet comprises the following components in percentage by weight: 40-60% of alpha-crystal imatinib mesylate, 5-20% of antisticking agent, 20-50% of disintegrating agent and 0.2-1% of lubricating agent, wherein the sum of the weight percent of each component is 100%. According to the invention, through adding the antisticking agent, the defects of poor mobility, poor compressibility, poor stickness, static electricity and the like of alpha-crystal imatinib mesylate are avoided effectively; and the imatinib mesylate tablet prepared by alpha-crystal imatinib mesylate has consistent hardness, disintegration, dissolution and other quality standards with original tablet prepared by beta-crystal imatinib mesylate, and the detect that only beta-crystal imatinib mesylate is required as the raw material for preparing the imatinib mesylate tablet in the existing industry is solved.

The invention discloses an intelligent dual-seed-filling hole roller rice precision sowing device. The intelligent dual-seed-filling hole roller rice precision sowing device is composed of a seed box,a dual-seed-filling seed supply mechanism, a hole roller, a seed-filling quality monitoring feedback system, a seed clearing wheel, a synchronous seed protection rubber belt, a steel wire seed pushing mechanism, an electromagnetic direct vibrator and a mandrel. The dual-seed-filling seed supply mechanism is composed of a first seed-filling mechanism body formed by stacked seed guiding plates anda second seed-filling mechanism body formed by vibration-flow V-shaped groove plates. The seed-filling quality monitoring feedback system is composed of detection sensors, a mounting frame and a control module, wherein the detection sensors are installed in the form of correlation, the control module is connected with the electromagnetic direct vibrator, and by detecting hole signals, startup andshutdown of the electromagnetic direct vibrator are controlled; the steel wire seed pushing mechanism is located in the hole roller, the sowing process sequentially comprises the procedures of primaryfilling, monitoring feedback, secondary supplement, seed clearing, seed protection and seed putting. The intelligent dual-seed-filling hole roller rice precision sowing device effectively solves theproblems that when a traditional roller seeder works, rice seeds have poor mobility in seed filling chambers, the seed filling reliability is low, and holes are easily blocked. Therefore, the intelligent dual-seed-filling hole roller rice precision sowing device has practical value.

The invention provides a permission validation method, an access control terminal and an access control system and relates to the technical field of intelligent security, wherein the permission validation method comprises: if a first feature of an object to be approved which is collected by a first feature collection device in the access control system is received, acquiring a plurality of registration features corresponding to at least one object; validating pass permission of the object to be passed according to the acquired registration features to obtain validation results; transmitting the validation results to a control module of the access control terminal so that the control module in the access control terminal controls a gate of the access control terminal to keep closed or open according to the validation results; the technical problem that existing access control permission validation is low in speed with poor mobility is solved, and permission validation speed and moving convenience of the access control terminal are increased.

The invention discloses a telescopic radar antenna back frame, relates to a radar antenna auxiliary tool, and aims to solve the problem of large size, inconvenient transport and poor mobility of the existing radar antenna back frame. A first telescopic joint, a second telescopic joint, a third telescopic joint, a fourth telescopic joint, a fifth telescopic joint, a sixth telescopic joint, and a seventh telescopic joint are embedded in sequence from the bottom up; a single guide rail in each telescopic joint is formed in dual guide rails in a corresponding telescopic joint; every two extension chain wheels that are adjacent up and down are wrapped with an extension chain; every two retracting chain wheels that are adjacent up and down are wrapped with a retracting chain; two hydraulic cylinders are arranged symmetrically around a vertical central line of a box body; and one end of each hydraulic cylinder is hinged with the lower end plane of the bottom plate of the box body on the second telescopic joint while the other end of the hydraulic cylinder is hinged with the upper end plane of the bottom plate of the box body on the first telescopic joint. The telescopic radar antenna back frame is used for supporting the radar antenna.

The invention discloses a sewing method of a knitting western-style suit and the knitting western-style suit. The method comprises respectively cutting a front cut piece, a rear cut piece, lateral cut pieces and sleeves of the knitting western-style suit; pressing a layer of elastic lining cloth at the bodice part of the front cut piece, pressing a layer of reinforcing lining at the lapel part, and pressing a layer of reinforcing lining at the position of the hem of the front cut piece; pressing a layer of elastic lining cloth at the position from the back to the underarm part, and pressing a layer of elastic lining cloth at the positions of armholes of the lateral cut pieces respectively; ironing a layer of elastic lining cloth at the positions of sleeve crowns of top sleeves of the sleeves respectively, and ironing a layer of elastic lining cloth at the positions of the sleeve crowns of the under sleeves of the sleeves respectively; respectively ironing a layer of elastic force lining cloth at the positions of sleeve rear seams of the top sleeves and the sleeve rear seams of the under sleeves; ironing a layer of traction strip at the position of the front shoulder seam where the front cut piece is combined with the rear cut piece, and utilizing an integral chest-shoulder lining at the chest-shoulder parts of the knitting western-style suit respectively. The technical scheme of the sewing method of the knitting western-style suit and the western-style suit can solve the problems that the front chest part of the knitting western-style suit has poor mobility and shell fabric is difficult to be coordinated and integrated with auxiliary materials.

The invention discloses a treatment process for microorganisms of drilling solid waste. The treatment process is characterized by comprising the steps: firstly, carrying out bacterial culture; secondly, preparing a drilling solid waste mixture; then, carrying out the treatment process according to the following steps: a, preparing a jar for treating microorganisms of the drilling solid waste; b, laying a plurality of horizontal tubes at the bottom of the jar, and perforating the horizontal tubes; c, laying pebbles at the bottom of the jar, wherein the laying thickness of the pebbles is largerthan the diameter of the horizontal tubes; d, laying the prepared drilling solid waste mixture on the pebbles; e, placing a humidity sensor and an oxygen sensor in the drilling solid waste mixture. Byadopting the method, the problems of fixedness and poor mobility of a microbial treatment tank of the drilling solid waste, and the oxygenation and humidification in the treatment process can be effectively solved, and the degradation process can be completed in a relatively short time, so that the mixture reaches the national soil level III standard, and environmental risks are eliminated.

The invention provides a dendrobium officinale pure powder tablet without adding any auxiliary materials and a preparation method of the dendrobium officinale pure powder tablet. The dendrobium officinale is dried, coarsely grinded and finely grinded, hot water is innovatively taken as a binder, the characteristic of high polysaccharide content and the principle that the viscidity of the dendrobium officinale is enhanced when the dendrobium officinale is heated are taken advantages to fulfill the purpose of pelleting the dendrobium officinale without adding new auxiliary materials, and the problems of poor mobility of the fine powder tablet material and difficulty in controlling the difference of tablet weight are solved. The particles are uniform in diameter after pelleting, the dendrobium officinale pure powder tablet is easy to pellet, and the surface of the tablet is smooth. The dendrobium officinale pure powder tablet fully keeps the active ingredients of the dendrobium officinale, no auxiliary materials are added, the content of the dendrobium officinale is high, and the nutritional ingredients of the dendrobium officinale are absorbed much easily after the dendrobium officinale is superfinely grinded. The dendrobium officinale pure powder tablet provided by the invention is convenient to eat, has the simple preparation method and excellent market prospects.

The invention discloses a soil conditioner. The soil conditioner is prepared from the following raw materials in parts by weight: 35-50 parts of straw pellets, 30-50 parts of sesbania powder, 3-5 parts of strain powder, 10-20 parts of dissolving-out agent, 15-20 parts of adsorbent, 5-7 parts of precipitant, 5-10 parts of phosphorite and 5-15 parts of urea. The dissolving agent in the soil conditioner disclosed by the invention is used for dissolving out heavy metal ions contained in the soil, and a water-soluble and migratory pollutant is changed into a substance with poor mobility and low toxicity due to the precipitation and adsorption actions of a precipitant and an adsorbent, so that the bioavailability of the pollutant in the soil is reduced, and the migration of the pollutant to other environmental systems is reduced; and meanwhile, nutrient elements required by plants are temporarily replenished by the phosphorite and the urea, and various nutrient elements are effectively provided for the plants for a long term by virtue of microorganisms.

The invention relates to an irbesartan and hydrochlorothiazide tablet and a preparation method thereof, belonging to the technical field of drug preparations. The tablet contains an irbesartan and hydrochlorothiazide medicinal premix, wherein the irbesartan and hydrochlorothiazide medicinal premix is formed by irbesartan, hydrochlorothiazide and inulin lauryl carbamate, wherein the ratio of the total weight of irbesartan and hydrochlorothiazide to the weight of inulin lauryl carbamate is 1:(0.5-2), and the weight ratio of irbesartan to hydrochlorothiazide is 12:1. The tablet has the advantages of high dissolution rate and high uniformity. The preparation method of the tablet can be used for solving the problems of electrostatic adsorption, agglomeration, poor mobility and sticking of irbesartan and hydrochlorothiazide.

The invention relates to an electrically-heated energy-storage heat exchanger and a heat storing and releasing method thereof and solves the problems of non-uniform energy distribution and low energy utilization rate in the heat exchange process of an existing electrically-heated phase change heat storage and exchange device. The electrically-heated energy-storage heat exchanger comprises a tank-shaped shell and an electric heating pipe; the shell is filled with a heat storage medium. The electrically-heated energy-storage heat exchanger is characterized in that a heat exchange pipeline is also arranged in the shell and is vertically folded back in a vertical plane to be coiled in an S-shaped manner; the heat exchange pipeline is folded to and fro in a horizontal plane to be arranged in an S-shaped manner or spirally arranged inside the shell around a circle center; an opening is formed in the upper end of the shell, and a detachable cover plate is arranged at the upper end of the shell; an inlet and an outlet of the heat exchange pipeline penetrate out of the shell from the cover plate; the electric heating pipe extends into the inside of the shell downwards from the cover plate. The electrically-heated energy-storage heat exchanger provided by the invention performs uniform heat exchange on the heat storage medium with poor mobility, so that the heat utilization efficiency is improved.

The invention relates to a high-speed ship on the basis of double inclinable screw propellers, and belongs to the technical field of ship propulsion. The double inclinable screw propellers are symmetrically distributed on the middle upper portion of the high-speed ship and can be reasonably inclined at certain angles, so that propulsion force has upward component force and component force in an advancing direction. The upward component force overcomes a part of the gravity of the high-speed ship, the immersion depth of the ship is reduced, and the resistance on the ship is decreased; and the component force in the advancing direction pushes the ship to advance. A tail fin screw propeller is arranged at the tail of the ship, the inclination position of the tail fin screw propeller can be changed, and the tail fin screw propeller can be matched with the front double screw propellers in an equilibrium manner, so that the ship can run stably. The high-speed ship overcomes shortcomings of poor stability of equilibrium of a common high-speed ship and poor mobility of the common high-speed ship, and has the advantages of capability of running at a high speed, excellent mobility and stability of equilibrium, and the like. Besides, the high-speed ship is low in cost and has popularization value.