91results about How to "Interchangeable" patented technology

The invention relates to a device and method for continuous block metal glass shaping, belonging to the technical field of metal material preparation. A heat insulating ring is arranged between a graphite casting mould and a water cooling copper mould which are arranged in a first vacuum chamber, an air cooler is arranged in a second vacuum chamber, and a traction rod enters the graphite casting mould and horizontally moves by a traction device. The method uses the graphite casting mould and the water cooling copper mould for primary main cooling and the air cooling mode for secondary auxiliary cooling, and the two vacuum chambers have a certain air-pressure difference. The device and the method have a high cooling speed, satisfy the requirements of the amorphous phase change of the block metal glass material. The shaping pressure of a metal melting body can be easily controlled, and the good shaping performance of the metal melting body is ensured by adjusting the pressure in the vacuum chambers. The metal passes through the graphite casting mould in a liquid state and is solidified in the water cooling copper mould, and the casting graphite casting mould has long service. The composite casting mould and the traction device have exchangeability to be convenient for realizing the continuous shaping of rod wires, boards, pipes and abnormal-shaped materials of different section sizes.

The invention relates to the technical field of underwater robots, and particularly relates to a deep ocean work-type modular ROV control system, which comprises a remote communication system, a motion planning processor, a gesture detection system, a manipulator motion control system, a propeller control system, a video acquisition system, an underwater light control system, a hydraulic control system, and an underwater monitoring system, wherein the remote communication system is used for receiving an order sent by a water surface controller, acquiring data of each underwater subsystem and uploading the data; and the motion planning processor carries out integrated judgment and reasonably plans ROV motion control according to the current system state and the order sent by the water surface controller. The problem that the system is low in automation is solved; a correction and automatic judgment ability is strong; when each sub part of the system is wrong, other sub parts can cooperate mutually, safety work or recovery of the system can be ensured, and intelligence is high, and the fault tolerance ability is high.

The present invention provides a method for mounting shipping stern tube bushing, the bushing mounting position of the shipping stern tube processes to an epoxide resin plug hole, inner diameter of stern shaft tube is smaller than outer diameter of bush which is placed in lining mounting position of stern shaft tube, the bush is adjusted to location and gap between outer edge of two ends of lining and stern shaft tube is sealed, filling liquid epoxide resin in chamber betwwen lining and stern shaft tube by epoxide resin plug hole, the lining is exactly fixed in the stern shaft tube by solified epoxide resin. The mounting method of shipping stern tube lining has safe, credible characteristics, and shortens mounting cycle, reduces power strength.

The invention discloses a Mg(OH)2 / Mg-Sn hydrotalcite composite film having an intercalation structure on the surface of magnesium and magnesium alloy and a preparation method thereof, relates to the technical field of the surface of magnesium and magnesium alloy, and aims to improve the corrosion resistance of magnesium and magnesium alloy and widen the application prospects in the fields of biological medicine and the like. The preparation method comprises the following steps: S1, initial treatment of magnesium and magnesium alloy; S2, pretreatment: preparing a Sn4<+> salt solution, regulating the pH value to 4.0 to obtain a pretreatment solution, and putting the magnesium and magnesium alloy in the pretreatment solution with continuously introduced CO2 to obtain a precursor film; S3, posttreatment: soaking the magnesium and magnesium alloy coated with the precursor film in a Na2CO3 solution to grow a Mg(OH)2 / Mg-Sn hydrotalcite composite film on the surface of the magnesium and magnesium alloy; and S4, subsequent cleaning. According to the invention, the Mg(OH)2 / Mg-Sn hydrotalcite composite film containing no aluminum and having biosafety is grown on the surface of magnesium and magnesium alloy in an in-situ generation manner through a two-step method; the corrosion resistance of magnesium and magnesium alloy is improved; and the application of the hydrotalcite film in biological magnesium alloy surface protection is widened.

The invention discloses an LED bulb lamp easy for automatic assembly. The LED bulb lamp comprises a lampshade, a lamp body, fasteners, a light source and power source combination, a wire board and a lamp cap, and is characterized in that the lampshade is clamped into an annular groove formed at the upper end of the lamp body, an annular platform formed by concaving is arranged at the upper end of the lamp body, the light source and power source combination is mounted on the annular platform, the annular platform and the light source and power source combination are fastened through the fasteners, two symmetrical rectangular grooves are formed inside the lamp body, the wire board is inserted into the rectangular grooves, and the lamp cap is mounted on a round stepped tube arranged at the lower end of the lamp body. Being structurally designed in an optimized, standardized and serialized manner, the LED bulb lamp is interchangeable, simple in structure, easy for automatic production, good in radiating effect, high in production efficiency and low in cost.

The invention provides an underground fuel gas pipe network safe evaluation system, equipped with fuel gas pipeline risk evaluation database and risk evaluation algorithm, and implementing fuel gas pipeline risk evaluation automated management, and comprising database maintaining module, data management module, evaluation record management module, evaluation record analysis module, pipeline graphics data module, C scan data management module, and weight regulating module. On the basis of building city fuel gas pipeline risk evaluation basic database, the management system of the invention closely combines with service flow of risk evaluation technique to implement scientific and automatic management of risk evaluation.

The invention discloses preparation and application of a nitrate treatment agent. The preparation method includes: taking cotton as the template, using coprecipitation process to synthesize biomorphiczinc titanium iron ternary hydrotalcite, and conducting roasting in a muffle furnace so as to obtain the nitrate treatment agent. The invention also provides application of the nitrate treatment agent prepared by the method in treatment of nitrate wastewater. The nitrate treatment agent prepared by the method has good adsorption effect on nitrate and is easy to separate, and has simple and feasible regeneration method, thus having broad application prospects in the field of nitrate wastewater treatment.

The invention discloses a method for removing harmful anions from an aqueous solution by adopting a Friedel salt or Kuzel salt. The method comprises a step of removing the harmful anions from the aqueous solution by adopting the Friedel salt or Kuzel salt, wherein the harmful anions comprise one or more of F<->, CN<->, SCN<->, As (III, V) and Cr (VI), and the aqueous solution comprises one or more of drinking water, underground water sources, industrial wastewater and tailings water containing harmful anions. According to the method disclosed by the invention, the Friedel salt or Kuzel salt is applied to the aqueous solution containing the harmful anions, the removal efficiency of the harmful anions is very high, and the effect is obvious; the materials required for preparing the Friedel salt or Kuzel salt are wide in source, low in preparation energy consumption and less in investment; by adopting the method to remove the anions from the aqueous solution, the flow is short and the cost is low, so that the method has a wide application prospect.

The invention discloses a method used for deep desilication of a sodium aluminate solution containing silicon. According to the invention, brine containing magnesium chloride is used as a raw material to prepare magnalium hydrotalcite (Mg6Al2 (OH) 16CO3.4H2O), and the magnalium hydrotalcite is used as a desilication agent to carry out deep desilication on the sodium aluminate solution containing the silicon; and at least 80% of silicon dioxide can be removed from the sodium aluminate solution containing the silicon; rich seawater or salt lake brine calcium chloride resources are used to prepare the magnalium hydrotalcite; the magnalium hydrotalcite is used to carry out deep desilication on the sodium aluminate solution containing the silicon in the alumina industry; waste resources are recycled; the environment pollution is reduced; the alumina production cost is reduced; and the economic efficiency of an enterprise is improved.

The invention discloses an intelligent man-machine interactive device, which comprises a core control unit, an operation input unit, an indication output unit, a communication interface unit used for connecting other terminals and a programmable external unit having an auxiliary function, wherein the operation input unit comprises at least two operation input terminals; the indication output unit comprises at least two image display terminals; the programmable external unit is designed in a modularization package manner and comprises an imitating peripheral component and a digital peripheral component; different peripheral components are arranged flexibly at different situations. The intelligent man-machine interactive device has the advantages that the volume is small, the function is complete, the device is programmable, the peripheral component is modularized, the function is virtualized, and the device can be expanded in various sides, thereby acquiring more intelligent and humanized man-machine interaction process, increasing the working efficiency of an operator and reducing the working risk of the operator.

The present invention provides a liquid writing component and pen equipped with the component which relates to writing tool; a liquid writing component comprises a pen stem, a pen head, an ink cavity and a water diversion part equipped between the pen head and the ink cavity; the pen stem internal and external circles are equipped with a plurality of circular grooves; the bottom surfaces of the circular grooves are equipped with water storing devices and the central parts of the pen stem and the water storing devices are equipped with central holes through with the water diversion part can be penetrated; a valve channel communicated with the ink cavity is equipped between the external surface of the water diversion part and the internal surface of the central holes; the circular groove bottom surface of the water storing devices is equipped with nicks communicated with the central holes; the water storing device of the component boasts of simple structure and low cost; the valve channel clearance can meet the matching requirements of various pen head and the ink cavity internal pressure; in this way, the present invention boasts of wide application fields, smooth ink delivery and excellent leakage resistant function; the ink bag structure reduces the writing cost; the component has the features of common utilization and interchangeable technology and can be purchased independently and alternatively used repeatedly. Therefore, the component is fit for liquid pen and liquid pen refill.

The invention discloses a high-strength alkali activated gel material applicable to special environments. On the basis of a traditional alkali activated gel material, iron-ore slag is adopted and ironand cesium hydrotalcite are added; the main function of the iron and cesium hydrotalcite is as follows: iron and cesium hydrotalcite, belonging to anionic layered compounds, can form ion exchange with a large quantity of components of CaO, SiO2, Al2O3, MgO, MnO, Fe2O3, and the like, in iron mine powder, under the action of liquid sodium silicate and catalytic effect of cesium element, and can achieve an excellent bonding effect; iron and cesium hydrotalcite with a layered structure can achieve a buffering effect under the condition of impact of external forces and can enhance the compressivestrength of the material. The preparation process of the high-strength alkali activated gel material is as follows: uniformly mixing iron-ore slag and iron and cesium hydrotalcite; adding into liquidsodium silicate and stirring so as to form ion exchange; adding the rest raw materials; putting into a mold, heating and steaming. Compared with the traditional preparation method, the preparation process according to the invention has the advantages of excellent bonding effect and higher strength of materials.

The invention relates to a distribution and arrangement method for a triple-junction solar cell array, and belongs to the technical field of solar cells. The distribution and arrangement method for the triple-junction solar cell array is characterized in that the solar cell array is arranged in mirror mapping mode, a mode of folding back and forth and a mode in which the south and north wings are arranged identically; the mirror mapping mode is realized by dividing each solar panel into four subarrays, wherein every two subarrays are totally symmetric. The distribution and arrangement method for the triple-junction solar cell array has the advantages of simpleness, high anti-irradiation capacity, low voltage between cells, electrostatic discharge prevention, strong interchangeability, wide application, high production efficiency and the like, and meets the requirements of the solar cell array on reliability and the like; remanence is reduced; and the triple-junction solar cell array is convenient to produce.

The invention relates to a high-flow cross-draining water-sealing floor drain, belongs to the technical field of floor drains and provides a cross-draining floor drain small in size, high in flow capacity and compatible with washing machine drainage; according to the technical scheme, a floor drain body is a container with a top opening, a water-sealing cover is in the shape of a ring having the inner cylindrical face extended down to form a barrel, the water-sealing cover is arranged inside the floor drain body, the bottom of the barrel hangs in the air, the ring of the upper portion of the water-sealing cover adapts to the upper portion of the floor drain body in shape and is locked to the upper portion of the floor drain body, a water seal is formed between the water-sealing cover and the floor drain body, a frame is mounted above the water-sealing cover and the floor drain body, and a grate is mounted in the frame; the outer side of the floor drain body is connected with a water outgoing pipe, the water outgoing pipe includes a square tube segment, a transition segment and a circular tube segment, the square tube segment is connected to the outer wall of the floor drain body, and the upper portion of the sidewall of the floor drain body inside the square tube segment is provided with a horizontal water outlet; the high-flow cross-draining water-sealing floor drain is suitable for cross-draining pipelines.

The invention discloses a railway transportation vehicle unit of multi-specification large-tonnage precast girders. The railway transportation vehicle unit comprises a head vehicle and a tail vehicle, wherein the head vehicle adopts the same main-body structure as the tail vehicle; a plurality of fixing positions for bridge-girder supporting devices are arranged on the head vehicle, and a plurality of fixing positions for bridge-girder supporting devices are arranged on the tail vehicle; the transportation of multi-specification precast girders is realized by moving the fixing positions of the bridge-girder supporting devices on the head vehicle and the tail vehicle. The railway transportation vehicle unit disclosed by the invention can transport precast girders of 16m, 24m, 32m, and the like, which are close to length specifications, and has multiple functions; the head vehicle and the tail vehicle adopt steel-floor structures, positioning holes are formed in steel floors, the steel floors are made by a mold and have interchangeability, and the positions of steering wheel holders and the positions of the bridge-girder supporting devices are convenient to change; major configurations of the head vehicle, major configurations of the tail vehicle, and major configurations of a middle railway wagon adopt a convention mature technology, and are high in reliability; when the railway transportation vehicle unit does not transport girders, any of the head vehicle, the tail vehicle and the middle random vehicle can be used as a common flat vehicle, so that the application of the railway transportation vehicle unit is flexible.

The invention relates to a car coupler adapter for railway vehicles. The adapter comprises an installation seat, a middle adapter and a head car adapter. The installation seat comprises a back seat plate and an adaptation seat connected on the back face of the back seat plate. A coupler knuckle assembly is installed on the adaptation seat, and a middle adapter and the head car adapter can both be detachably installed on the back seat plate. The car coupler adapter achieves switching of the middle adapter and the head car adapter to achieve integration of the plurality of adapters, enables car coupler adapters not to be independent again to have compatibility and interchangeability. The car coupler adapter adopts different combinations to achieve connection of different car couplers, and achieves mutual connection and matching of couplers on two sides without limit of height difference of couplers on two sides. Rescue and switching operation in sites or on lines can be achieved by simply combining different modules.

The invention provides a coated slow-release organic fertilizer and a preparation method thereof, and relates to the field of fertilizers. The organic fertilizer is composed of a urea core body with the particle size of 1-5 mm and a coating film. The coating film is composed of a slow-release layer on the inner side and an isolation layer on the outer side. The slow release layer comprises 60-90%of carbon-based loaded layered double hydroxides according to the total mass; the isolation layer is made of a styrene-acrylic emulsion-paraffin-phosphogypsum material; tests show that the slow-release performance of a fertilizer without the isolation layer is greatly reduced after stirring and mixing and the fertilizer efficiency is completely released after 16 days, while the slow-release performance of the fertilizer containing the isolation layer is not influenced by stirring and mixing, so that the isolation layer can well protect the fertilizer, and the influence of collision and abrasion on the slow-release performance of the fertilizer is avoided.

The invention discloses a wind sensor anti-freezing control system of an automatic meteorological station. The wind sensor anti-freezing control system of the automatic meteorological station is mainly composed of a single chip microcomputer, a communication interface circuit and an optoelectronic isolation driving circuit, wherein the communication interface circuit is connected with the single chip microcomputer. The communication interface circuit is connected with a parameter sampling circuit, the optoelectronic isolation driving circuit is connected with a heating circuit, the single chip microcomputer, the communication interface circuit and the optoelectronic isolation driving circuit are all connected with a power source management circuit, and the communication interface circuit and the parameter sampling circuit are further provided with a command control circuit. The wind sensor anti-freezing control system of the automatic meteorological station has the advantages that the heating circuit is installed inside a sensor, the wind flow field is not affected, mechanical abrasion influences do not exist, and the accuracy of observation data is not affected. The life expectancy and the period of the heating circuit is more than two years, the overhauling and maintenance can be carried out along with a re-testing period of the automatic meteorological station, and meanwhile a resistance heating wire device is easy to replace, maintain and overhaul and low in price.

The invention belongs to the technical field of separation and purification of rare earth, and particularly relates to an environment-friendly high-purity cerium dioxide extraction method. The methodcomprises the following steps: (1) extracting: mixing a cerium chloride material liquid and an extracting agent at the volume ratio of 1:(1.2-1.5), extracting, separating, adding hydrotalcite whose weight is 4-6% of the weight of the extracting agent at the same time, conducting ultrasonic dispersion for 20-30 minutes, leaving to stand, then separating, recycling a solid phase, inputting an organic phase into a reextraction procedure; (2) reextracting: taking an oxalic acid solution, wherein the volume of the oxalic acid solution is 1.5-2.0 times the volume of the organic phase, reextracting at the temperature of 50-60 DEG C, conducting ultrasonic dispersion for 20-30 minutes, filtering to obtain a precipitate; (3) oxidizing: firing and oxidizing the obtained precipitate at the temperatureof 1000-1100 DEG C for 12-15 hours, and obtaining the high-purity cerium dioxide. The method abandons the traditional alkaline saponification causing serious ammonia nitrogen pollution, and the artificial hydrotalcite is used to implement ion exchange in the extraction process, so that the balanced acidity of the system is maintained, and the environmental pollution is reduced.

The invention relates to a milling machine, in particular to a gantry milling machine with multiple milling heads, which includes a bed, left and right columns, beams, and an electrical control cabinet. The workbench is provided with fixtures, the left and right columns are fixed on the bed, the beam is installed on the left and right columns to form a gantry frame, and the first milling head assembly is installed on the beam. The above-mentioned first milling head assembly is electrically connected with the electrical control cabinet, and a plurality of second milling head assemblies are installed on the beam, and a pushing mechanism for pushing the workbench is arranged on the bed, and the device also It includes an independent driving device that provides power for the pushing mechanism, and the second milling head assembly is electrically connected with the driving device and the electrical control cabinet. The invention can adjust the length of the processing surface according to the size of the product, and also has the advantages of simple structure, low equipment investment, stepless speed regulation, and improved production efficiency.

The invention discloses electronic cigarette liquid filling equipment and a use method thereof. The equipment comprises a body, a cigarette liquid bottle storage unit, a filling unit, a capping unit,a storage unit and a control unit, wherein the cigarette liquid bottle storage unit, the filling unit, the capping unit, the storage unit and the control unit are arranged on the body. The cigarette liquid bottle storage unit comprises a bottle body containing module and a cap body containing module, wherein the bottle body containing module is detachably mounted on the body. The filling unit andthe capping unit can relatively move independently. The storage unit is used for recording and storing cigarette liquid bottle containing information in the bottle body containing module, cap body containing information in the cap body containing module, position information of the filling unit and position information of the capping unit. The control device controls the filling unit to quantitatively inject electronic cigarette liquid into cigarette liquid bottles according to the cigarette liquid bottle containing information and the position information of the filling unit and further controls the capping unit to take cap bodies out of the cap body containing module to cover the cigarette liquid bottles in which the electronic cigarette liquid is injected according to the cigarette liquid bottle containing information, the cap body containing information and the position information of the capping unit.

The invention discloses a motor performance testing device with a high-strength equivalent weight support. The motor performance testing device with the high-strength equivalent weight support comprises the equivalent weight support, a base plate and a platform. The equivalent weight support is arranged on the platform through the base plate, is of an L-shaped structure and comprises a main plate and a plurality of attached plates, wherein the attached plates are locked and fixed on the main plate through support bolts. A heat-insulating plate is further arranged between the equivalent weight support and the base plate. The effective heat radiating area of the whole equivalent weight support is comparative with the heat radiating area of a standard support, the heat radiating effect meets the national standard test requirement, and the heat-insulating plate further arranged between the equivalent weight support and the base plate to enable the equivalent weight support to become an independent heat radiating body. Due to the equivalent weight support is a geometrical body consisting of a plurality of aluminum plates, the strength and the rigidity of the device are improved greatly, the heat-insulating plate can enable heat radiating amount of the equivalent weight support to be accurate and prevent heat of the equivalent weight support from being transferred to other members on the motor performance testing device.

The invention discloses a general gasoline engine, which comprises a general gasoline engine box body, two general gasoline engine cylinder heads and an upper air passage assembly, wherein the two general gasoline engine cylinder heads are connected with the general gasoline engine box body, the upper air passage assembly surrounds the outside of the general gasoline engine cylinder heads, and comprises a fan cover and a flow guide cover, and the flow guide cover and the fan cover are matched in an inserting connection mode and are used for forming a cooling air passage through which cooling air flows between the two general gasoline engine cylinder heads. Through the inserting and connecting type matching between the flow guide cover and the fan cover, the matching among all components is tighter, the sealing performance of the cooling space is improved, the airflow loss in the cooling space is reduced to the greatest degree, the heat radiation effect is ensured, and the integral structure is compact; in addition, the realization of the structure is simple, the operation is convenient, the dismounting, the mounting and the maintenance are easy, and the replacement is easy.

The invention relates to an efficient extraction method for high-purity lanthanum oxide. The efficient extraction method comprises the following steps of (1) extraction: mixing a lanthanum oxide feedliquid with an extraction agent at a volume ratio of 1:(2.5-3.5) for extraction separation, carrying out ultrasonic dispersion for 10-15 min, and carrying out separation after standing, wherein the extraction agent comprises the following raw materials including, by volume, 20%-24% of P507, 10%-15% of 1,2,5-thiadiazole-3,4-dithiol and the balance kerosene; (2) back extraction: carrying out back extraction on an oxalic acid solution with the organic-phase volume being 3.0-4.0 times at 50-60 DEG C, carrying out ultrasonic dispersion for 20-30 min, carrying out precipitation, and carrying out filtration to obtain a precipitate; and (3) oxidation: carrying out burning oxidation on the obtained precipitate at 800-900 DEG C for 12-15 h so as to obtain lanthanum oxide. According to the efficientextraction method provided by the invention, a specific amount of 1,2,5-thiadiazole-3,4-dithiol is added into an extraction system; through cooperation between the 1,2,5-thiadiazole-3,4-dithiol and the P507, the hydrophobicity of a lanthanum extraction complex can be higher; and accordingly, the entry into an organic phase can be easier, and the extraction efficiency and the distribution ratio canbe improved.

The invention provides a short large-aperture inlaid centering fixture which can ensure radial and axial locating precision, has interchangeability and is convenient to operate and high in generalization degree. The short large-aperture inlaid centering fixture comprises a flange and is characterized in that a transition disk is supported on the flange; a fixture body is supported on the transition disk; the guide opening of the flange is provided with a tensioning disk; the center of the tensioning disk is connected with a draw rod; a chuck body is provided with a connecting disk; the fixture body is internally provided with multiple clip spring bases and elastic clip springs; spigot matching structures are arranged between the clip springs and the clip spring bases, between the fixture body and the connecting disk and between the transition disk and the flange; the upper parts of the inner walls of the clip springs are provided with T-shaped grooves; the upper parts of insert blocks are provided with clamping platforms which extend inwards; the clamping platforms are clamped in the corresponding T-shaped grooves, and the clamping platforms and the T-shaped grooves are connected and pressed by screws; the internal guide surface of the upper opening of the fixture body is in conical surface contact with the external side surfaces of the upper parts of the clip springs; the clip spring bases, the connecting disk and the tensioning disk are connected by virtue of guide posts.

The invention discloses a software-based method and system for extending a web television terminal, which includes: extending modules by equipping software with web television terminal functions in the browser module of the web television terminal; using the extending module of the web television and implementing extension to the functions of the web television terminal. The method and system of the invention is capable of describing the equipment capability of an IPTV terminal clearly, which is beneficial for the extendibility and self-adaptability of the system; the method integrates the access type of the IPTV terminal, which gives the IPTV terminal interchangeability and reduces the reliability of the system equipment and the terminal equipment, helping the upgrading and popularizing of the IPTV system.

An array type ultrasonic paper thickness measurement device disclosed by the present invention comprises a pedestal, a tank body, a breather pipe, a support, a paper carrying surface and N2 measurement mechanisms. The structures of the measurement mechanisms are same and are in rectangular array type arrangement after being installed, the row number and the column number of an array are both N, and the distances between the horizontal or vertical adjacent measurement mechanisms are same. Each measurement mechanism comprises an ultrasonic emission probe, an ultrasonic reception probe, a piston, a left cylindrical pipe, a pipe sleeve, a right cylindrical pipe, a connecting pin, a locking pin, a spring, an electromagnet, a fixing pin and a measurement end face. The array type ultrasonic paper thickness measurement device comprises the plurality of measurement mechanisms, and can realize the multi-point measurement. During the measurement process, each measurement mechanism operates independently, the thicknesses of the different local parts of a whole paper can be measured respectively and individually, and the average value of the measurement values of a plurality of points represents the thickness value of the whole paper, so that a measurement result is more reliable.

The present invention provides a wireless data collecting hardware module including a hardware main body and a firmware. The characteristics reside in: said firmware includes a name of code which is used as the individual recognition code of the hardware module. The solidifying program of the hardware module can be completed at one time along with the production of the hardware, and has the interchangeability and is suitable for the building of plug-and-play type expandable wireless data collecting network. The present invention also provides manufacturing method of the wireless data collecting hardware module. In the present invention, the individual recognition of the collecting hardware module in the network no longer depends on the working frequency or physics address in the firmware by setting name of code which is used as the individual recognition code of the hardware module in the firmware, but depends on the different name of code of the collecting hardware absolutely, thus, the expandable plug-and-play function of the wireless data collecting network can be realized.

The invention discloses a nano pectin coating-containing preservative film special for pitaya and a preparation method thereof, and belongs to the technical field of preservative films, the nano pectin coating-containing preservative film special for pitaya comprises a polyethylene film and a nano pectin coating coated on the polyethylene film, and the coating weight of the nano pectin coating is 1-7g / m < 2 >. The nano pectin coating is prepared from the following raw material components in parts by weight: 1-3 parts of pectin; 0.5-1 part of dehydroacetate intercalated hydrotalcite powder; 40-60 parts of distilled water; and 30-50 parts of glycerol. The preparation method of the preservative film special for the pitaya comprises the step of smearing the nano pectin coating in the preservative film special for the pitaya and containing the nano pectin coating on the surface of the polyethylene film through a coating machine. The preservative film can effectively inhibit the growth of bacteria, prolongs the shelf life of pitaya, and has good tensile strength, elongation at break and light transmission.

The invention relates to a low-stress high-damping railway fastener elastic strip. The elastic strip has a variable cross section in the direction of a center line, the coefficient of the variable cross section of the elastic strip is 1-3, and in other words, the ratio of the maximum cross section area to the minimum cross section area of the elastic strip is 1-3:1. Compared with the prior art, the elastic strip has the advantages that the maximum stress amplitude value of an existing elastic strip is decreased, and the safety coefficient of the elastic strip is increased.