56 results about "Prevention problems" patented technology

The invention provides an identity authentication method, identity authentication equipment, a server and an identity authentication-based encryption method and aims to solve the counterfeiting and repudiation prevention problems of identity authentication. The method comprises the following steps of: combining a written signature with a digital signature; acquiring the written signature handwriting of a user through the identity authentication equipment such as a universal serial bus (USB) key; combining the written signature handwriting with transaction data and performing digital signing; and transmitting signature data and the encrypted written signature handwriting to a verification party (such as an Internet bank background system). The signature data is verified by the verification party, so that the written signature handwriting and confidentiality data are not tampered in a transmission process; simultaneously, the truth of the written signature handwriting is verified by the verification party, so that the signature of the written signature handwriting by a user is ensured.

The invention discloses a first tunnel then station continuous construction shield station entering method. The first tunnel then station continuous construction shield station entering method comprises the following steps that a, in a station construction position, the arrangement distance between a station building envelope and a central stand column is controlled, and therefore a shield excavation space used for allowing a shield tunneling machine to pass through the station is formed; b, reinforcement process is conducted on the end head of the station, reinforcement is conducted the building envelope on tunnel shield excavation path of the shield tunneling machine, and grouting pipelines for preventing water leakage are reserved in the building envelope; c, the tunnel shield excavation path is made to be connected and communicated with the shield excavation space, and then a continuous tunnel shield excavation path form a tunnel to the station is formed; d, the shield excavation is conducted on the continuous tunnel shield excavation path. The first tunnel then station continuous construction shield station entering method aims at designing an excavation station passing method for the requirement that the station can not provide conditions on time when the shield tunneling machine has to pass the station, the shield tunneling machine can pass the station safely and successfully, the water prevention problem of the connecting joint of the station and the tunnel is solved, and the progress and the safety of the project are guaranteed.

The invention discloses a processing technology of ham, and relates to the technical field of food pickling. The processing technology comprises the following steps: (1) cutting and shaping fresh pig hind legs; (2) pickling pig hind legs by salt; (3) stacking the pig hind legs, overturning the piles, and pressing; (4) washing, drying in the sun, and trimming the shape; (5) hanging the pig hind legs to dry the pig hind legs in the air; (6) trimming the shape again; (7) filling the cracks to prevent insects; (8) carrying out western type fermentation; (9) painting the whole pig hind legs by edible bee wax (palm wax) so as to maintain the water content; (10) keeping on fermentation; (11) polishing and selling. The provided technology changes the conventional fermentation and storage method in ham industry, preserves the unique flavor of ham, solves the insect prevention problem which has not been solved in hundreds of years, and largely prolongs the shelf life. Moreover, compared with the conventional manufacturing technologies, the provided processing technology can effectively reduce the content of fat peroxide in the same fermentation period.

The invention discloses a malicious code detection method based on an SDN (Software Defined Networking), and belongs to the technical field of computer network security. New opportunities and challenges of solving detection and prevention problems of malicious codes under new architecture are brought to a network information security field by a brand new design concept of separating control and forwarding of the SDN. According to the method, through analysis of an SDN switch flow table characteristic selection method, a security data ranking and dimension reduction method for traffic characteristic selection based on OpenFlow is provided; on this basis, through comparison of influences on the operation time of different classification algorithms after characteristic selection, a reduction dimension m selection problem is analyzed, and the optimum characteristic subsets and matched classification algorithms corresponding to different kinds of malicious codes are found; the propagation characteristics and evolution models of the malicious codes in an SDN mobile environment are analyzed, thereby obtaining the influences of a node migration rate in a mobile network on the infection condition and explosion time of the malicious codes in a source sub-network and a target sub-network, and the influences have reference values on the routing control of the SDN controller to the switch nodes or host nodes.

The invention discloses a coiled tubing falling-prevention device and a usage method thereof. The coiled tubing falling-prevention device comprises a spear-shaped central rod, a grooving slip and a limiting prevention cylinder which are sequentially arranged from inside to outside in a sleeved mode. The inner wall of the limiting prevention cylinder sequentially and inward sinks from top to bottom step by step to form a first annular step and a second annular step which are in shapes of steps, the top end face of the grooving slip abuts against the lower end face of the first annular step, an outer thread is arranged on the outer wall of the spear-shaped central rod, a connecting outer thread is arranged on the inner wall of the first annular step of the limiting prevention cylinder, and the grooving slip is limited by adjusting the limiting prevention cylinder relative to the position at the thread connecting position on the spear-shaped central rod. A falling-prevention function during coiled tubing fishing can be played by using the coiled tubing falling-prevention device. When a dangerous overflow case appears at a well opening, blowout prevention short section matched with the device is rapidly installed in time, and the blowout prevention problem of a coiled tubing inner cavity and a small annulus between the coiled tubing and an oil pipe can be also solved.

The invention discloses an oral care liquid for preventing chemotherapy-induced oral mucositis, aiming to solve prevention problem of chemotherapy-induced oral mucositis. The oral liquid comprises is characterized by being prepared from Chinese herbs and comprising the following Chinese herbs by weight: 6-10 parts of Radix Serissae, 8-15 parts of Fructus Ligustri Lucidi, 8-15 parts of Ficus virens, 6-10 parts of Radix Rehmanniae, 6-10 parts of Radix Scrophulariae, 8-15 parts of Radix Ophiopogonis, 6-10 parts of Radix Adenophorae, 8-15 parts of Rhizoma Anemarrhenae and 3-6 parts of Herba Pileae Scriptae. Clinical tests prove that the oral care liquid has good effect in preventing chemotherapy-induced oral mucositis, and is suitable for clinical application and popularization.

The invention discloses a pulling bar controlled type dual-linkage freeze-prevention ceramic valve which comprises a base, a control part, and a switching part, wherein at least four channels are arranged on the plane of the base; the control part is fixedly arranged on the upper end of the base and consists of a static plate and a movable plate, five holes are formed in the plane of the static plate and are respectively a cold water inlet hole, a cold water outlet hole, a hot water inlet hole and a hot water outlet hole which are respectively communicated with the four channels, and a drain hole which is not communicated with the four channels, a concave cavity is formed in the plane of the movable plate, and the movable plate is covered on the static plate in a slideable manner, and according to the relative sliding position, the five water holes are communicated in pairs through the concave cavity selectively; and the switching part is arranged above the control part so as to drive the movable plate to slide relative to the static plate. The pulling bar controlled type dual-linkage freeze-prevention ceramic valve facilitates the input and output of cold water and hot water independently, and the icing and freeze prevention problems in winter can be solved.

The invention discloses a video link theft prevention method based on FFMPEG. The video link theft prevention method comprises the steps that an original video is uploaded to a catalog of a slice and sliced into M3U8 slice files through written slice pins, and the video obtained after slicing is automatically transmitted to a catalog of an encryption program to be automatically encrypted and then transmitted to a CDN server. The video played by a user is smooth, and the video downloaded in a special mode cannot be played normally. According to the method, the video theft prevention problem is well solved, and high practicability and operability are achieved.

A totally-closed socket includes: a housing, a protection door device, and a movable seat device, wherein the housing is composed of a socket cover and a socket base; the movable seat device comprisesa movable seat, a movable conductive piece mounting frame, a movable seat push plate and a spring; the protection door device has a base, a protection door, a slide block, a base lever and a spring,wherein the protection door is mounted on a protection door shaft, the protection door shaft is mounted on a shaft frame, the base lever are mounted under the protection door and the protection door shaft, a slope and a sliding slot are disposed on the slide block, the spring is connected with the slide block through a spring seat behind the slide block. When the protection door is pressed downward by the plug force, the protection door rotates downward to expose a jack. After the plug is inserted, and the movable seat with the conductive piece is clamped to the pins of the plug. Virtual and floating connection phenomena are avoided, and the single-pressure prevention problem is also solved. By appearance, the socket is a sealed cube and has no exposed jacks and pits. A safety factor is greatly improved. Virtual and floating connection sparks and resistance increases are prevented, and the service life is greatly prolonged.

The invention provides a synthetic fiberboard moisture and mildew prevention treatment technology. The technology comprises the following steps: 1, processing sodium silicate crystals Na2O.nSiO2 and sodium fluorosilicate crystals to prepare solutions, uniformly mixing the sodium silicate solution with the sodium fluorosilicate solution according to a mass ratio of 1:999-999:1, disposing the obtained mixed solution for 24h or above, and filing a container with the mixed solution; and 2, coating the surface of a synthetic fiberboard with the mixed solution through adopting a pressure spraying method or an in-container impregnation method to complete moisture and mildew prevention treatment. The technology can prevent influences of mildews induced by moisture absorption of synthetic fiberboards on the environment quality and the property loss, promotes development of the synthetic fiberboard industry, and is in favor of protecting the natural ecological forest. The treatment technology has the advantages of simplicity, low cost, short treatment time, and effective solving of the synthetic fiberboard moisture and mildew prevention problem.

The invention relates to a mining voltage type high-voltage explosion-proof frequency converter. The mining voltage type high-voltage explosion-proof frequency converter comprises a shell, wherein a plurality of reinforcing ribs are arranged on the outer wall and the inner wall of the shell; a plurality of clapboards are arranged in the shell, and partition the internal space of the space into a primary circuit chamber, a secondary circuit chamber and a water-cooling system chamber. The mining voltage type high-voltage explosion-proof frequency converter further comprises a water-cooling device, wherein the water-cooling device comprises an internal portion and an external portion; the internal portion is arranged in the water-cooling system chamber; the external portion is arranged outside the shell; the internal portion comprises an explosive-proof valve, a water distribution pipe and a water return pipe; the external portion comprises a radiator, an deionization exchanger and a pump unit. The mining voltage type high-voltage explosion-proof frequency converter has the beneficial effects that the explosion prevention problem during application of a voltage type high-voltage frequency converter under a coal mine is solved, and the problem of heat dissipation of a unit type structure is solved successfully. Through a water-cooled matched cabinet which is consistent with an explosion-proof standard, a plurality of water-cooling systems can be used at the same time, and a quick response can be made to failure of a cooling portion.

The invention discloses a high-strength energy-saving environment-friendly burglarproof water drain pipe for a bridge. The water drain pipe comprises a water drain pipe, and a filter screen and a water collection hole fixed ring which are molded once, wherein the filter screen consists of a filter plate and splicing teeth arranged at the edge of the filter plate; the water drain pipe consists of a large-diameter straight pipe and a small-diameter straight pipe which are connected through a conical pipe; lugs are uniformly arranged on the inner wall of the large-diameter straight pipe; the water collection hole fixed ring is adhered with the lugs in the large-diameter straight pipe; splicing holes are formed by gaps between the water collection hole fixed ring and the lugs; the splicing teeth on the filter screen are arranged in the splicing holes and are respectively adhered with the water collection hole fixed ring and the large-diameter straight pipe; a pitted surface layer is arranged on the outer surface of the water drain pipe; a pitted surface layer on the small-diameter straight pipe is provided with spiral concave-and-convex grooves. The high-strength energy-saving environment-friendly burglarproof water drain pipe has the advantages of high in anti-corrosion property, acid-alkali resistant, anti-aging, free of rusting energy-saving, environment-friendly, and the like; the load of bridge is reduced, the engineering quality is improved, the service life of the pipe is greatly improved, the maintenance cost is reduced, and the burglar prevention problem is radically solved.

The invention provides a solar water heater overfilling-prevention and emptying device, belongs to the field of solar water heater water pipe overfilling-prevention and emptying, and also relates to the field of overfilling-prevention of common water tanks. The device consists of a pressure control unit [1], an emptying one-way valve [2] and a pressure valve [3]. The pressure valve can be independently used for overfilling-prevention water supply control of a water tank and a water channel sharing water supply and water drainage pipes. The device has a simple and practical structure, can effectively solve the problems of overfilling-prevention and emptying of a solar water heater and a water supply overfilling-prevention problem of other water tanks sharing water supply and drainage pipes, and also has good freezing prevention performance. Besides, a hand operated mechanism provided by the invention can make the solar water heater normally used under the condition of power failure. The device can save precious water resource, and makes the application of the solar water heater wider so as to save energy used for heating.

The invention relates to the technical field of geotechnical engineering, in particular to a foundation treatment method. The foundation treatment method is characterized in that the mattress method is adopted, slag or medium sand or coarse sand or soil doped with stones or cohesive soil is used in a soil-rock combination ground, and the thickness of the mattress layer is 300-500mm; for the soil-rock combination ground with large difference in soil thicknesses, especially the position with large difference in compression amount of the ground, the width of a settlement joint is set to be enough, when the floor of a house is 2-3, the width of the settlement joint is 50-80mm, when the floor of the house is 4-5, the width of the settlement joint is 80-120mm, and when the floor of the house is more than 5, the width of the settlement joint is no less than 120mm; the post-cast strip method is adopted in the connection portion of a high layer and a low layer, the width is no less than 500mm, and the use function and water prevention problems of buildings due to the settlement joint are avoided. According to the combination mode, the independent foundation and one-column-one-pile mode is adopted, and the construction quality is guaranteed.

The invention discloses a pan granulation atomization dust collector, which is characterized in that a water filling pipe is transversally arranged at the middle position in a tank body of a pan granulator; one end of the water filling pipe is provided with a first regulating switch; the upper part in the tank body is transversally provided with a plurality of high-pressure atomizers through a pipeline; a high-pressure pump is connected with the other end of the pipeline; and the pipeline is provided with a second regulating switch. According to the pan granulation atomization dust collector disclosed by the invention, not only is the dust prevention problem of pan granulation solved but also the material drift loss can be reduced.

The invention relates to a method for preventing after-combustion of gangue piles, and concretely relates to an after-combustion preventing gangue pile platform with checkerboard-shaped ditches, and agrouting method thereof. The method for preventing after-combustion is characterized in that the easy deforming, fracturing and spontaneous combustion parts of the gangue pile platform and its surrounding gentle slope are trenched in a checkerboard manner after the fire of the spontaneous combustion gangue piles is extinguished, and are grouted. The method has the advantages of easiness in operation, significant effect, long lasting time, solving of the spontaneous combustion prevention problem of the gangue pile platform, improvement of the integral stability of a gangue dump, and further solving of the selection problem of a grouting material and the monitoring of the temperature and the processing of a backfill layer after the grouting.

The invention discloses a dust prevention support of a hung type automobile detection displayer. The dust prevention support comprises an installation plate, wherein the whole installation plate is in a rectangular shape. A hanging rod is arranged on one face of the installation plate, the axis of the hanging rod is parallel to the installation plate, a plurality of assembling holes are formed in the installation plate, a detachable transparent dustproof cover is arranged on the installation plate, and the transparent dustproof cover and the hanging rod are located on the two faces of the installation plate respectively. According to the dust prevention support of the hung and adjustable type automobile detection displayer, the transparent dustproof cover is arranged after the displayer is fixed to the installation plate, and therefore the dust prevention problem and the collision prevention problem of the displayer can be effectively solved; after the dust prevention support is used for a period of time, a user only needs to take down and clean the transparent dustproof cover, the dustproof cover can be repeatedly used, and therefore damage to the displayer is avoided; the problem that a traditional displayer which is hung through a rope shakes and swings is solved, and the safety problem caused when a tester can not see the displayer clearly and the displayer shakes is solved. The dust prevention support has high universality and connection strength and has the advantages of being convenient to use and durable in use.

The invention relates to a monitoring device for breaking prevention of the surface of a turntable on a derrick floor of a drilling machine for oil exploration, which is characterized in that: the monitoring device comprises a transducer of a photoelectrical encoder, a breaking-prevention controller and a hydraulic-controlled proportional valve; wherein the transducer of the photoelectrical encoder is connected with the hydraulic-controlled proportional valve via the breaking-prevention controller. The breaking-prevention controller is composed of an FPGA, a photoelectric isolation circuit, a JTAG port, operating keys, a power isolation module, a signal amplification circuit, a power amplification circuit, an indicator light, an LCD module and a crystal oscillation circuit; wherein the FPGA is connected with the photoelectric isolation circuit, the JTAG port, the operating keys, the power isolation module, the signal amplification circuit, the indicator light, the LCD module and the crystal oscillation circuit respectively; the photoelectric isolation circuit is connected with signal input of the transducer; the signal input of the transducer, the power isolation module and the power amplification circuit are connected with power input of 24V; and the power amplification circuit is connected with drive output of an electromagnetic valve. The invention has the advantages of resolving the spot breaking-prevention problem of the surface of the turntable on the derrick floor, reducing accident potential and improving the spot safety.

The invention relates to a method for viewing a specific section display area and a realization method thereof. An upper display layer is arranged above a lower display layer in a digital device screen and laminated, the upper display layer is a transparent or light-transmitting display panel, the upper display layer and the lower display layer are connected with a digital device processor, the upper display layer controls all or partial area through current, and the upper display layer and the lower display layer are from the same signal source; the upper display layer includes a similar color display area, a similar color display area boundary, an adjacent color display area and an adjacent color display area boundary, and a transparent and light-transmitting area is distributed between the similar color display area and the adjacent color display area; and the lower display layer includes a sampling operation area, a sampling operation area boundary, an adjacent sampling operation area and an adjacent sampling operation area boundary. The peep prevention problem of the screen can be solved, and ghost and light and shade change do not appear so as to have the effect of graphic interference on peeping of others.

Disclosed are a management system and a management method for correction and prevention problems. The management method includes summarizing, classifying and integrating the correction and prevention problems input by all departments, matching implementing measures for the correction and prevention problems from historical data, receiving amendments for the implementing measures by users, recording departments or persons in charge of the implementing measures in all departments in the implementing measures after amendment, tracking and verifying performance circumstances of corresponding part of implementing measures by the departments or persons in charge, summarizing the performance circumstances of each part of measures into implementing results of the whole measures, and simultaneously, updating the historical data. According to the management system and the management method, unified management for correction and prevention problems and related information can be performed, compared with paper management methods, operation and view of users are facilitated, and management efficiency is greatly improved.

The present invention discloses a converter circuit with bidirectional synchronization rectification and dead band self regulation. The circuit comprises a V1 side circuit and a V2 side circuit which are bilaterally symmetrical, the V1 side circuit comprises a MOS tube Q1, a MOS tube Q2, a MOS tube Q3 and a MOS tube Q4, and the V2 side circuit comprises a MOS tube Q5, a MOS tube Q6, a MOS tube Q7 and a MOS tube Q8. The converter circuit with bidirectional synchronization rectification and dead band self regulation provides the scheme that the synchronous rectification technology is controlled in the bidirectional conversion state aiming at the bidirectional DC/DC conversion, the bidirectional synchronous rectification is realized aiming at the LLC topology, the synchronous rectification backward flowing prevention problem under the DC/DC bidirectional conversion is solved, and through adoption of the bidirectional rectification technology, the dead time self regulation is realized so as to solve the problem that the time an LLC dead band area is controlled in the limit state so that the ZVS is not possibly realized. The converter circuit with the bidirectional synchronization rectification and the dead band self regulation realize dead band regulation while realizing bidirectional synchronous rectification backward flowing prevention so as to greatly improve the efficiency and the reliability of the circuit, allow the LLC efficiency to be optimized and improve the EMC problem.