947results about How to "Not destroyed" patented technology

The invention discloses a binocular stereoscopic vision matching method combining depth characteristics. The binocular stereoscopic vision matching method comprises: obtaining a depth characteristic pattern from left and right images through a convolutional neural network; calculating a truncation similarity measurement degree of pixel depth characteristics by taking the depth characteristics as the standard, and constructing a truncation matching cost function combining color, gradients and depth characteristics to obtain a matched cost volume; processing the matched cost volume by adopting a fixed window, a variable window and a self-adaptive weight polymerization or guide filtering method to obtain a cost volume polymerized by a matching cost; selecting an optimal parallax error of the cost volume by adopting WTA (Wireless Telephony Application) to obtain an initial parallax error pattern; then finding a shielding region by adopting a double-peak test, left-right consistency detection, sequence consistency detection or shielding constraint algorithm, and giving a shielding point to a parallax error value of a same-row point closest to the shielding point to obtain a parallax error pattern; and filtering the parallax error pattern by adopting a mean value or bilateral filter to obtain a final parallax error pattern. By adopting the binocular stereoscopic vision matching method combining the depth characteristics, the incorrect matching rate of three-dimensional matching can be effectively reduced, the images are smooth and image edges including edges of small objects are effectively kept.

The invention discloses a trusted computing platform of a computing and protection parallel double-system structure. wherein the trusted computing platform comprises a computing subsystem and a protection subsystem which are parallel, the computing subsystem is used for completing a computing task, and the protection subsystem is used for carrying out active measurement and active control on the computing subsystem according to a trusted strategy through a trusted platform control module; And the protection subsystem is specifically used for respectively carrying out static measurement and dynamic measurement on the computing subsystem through the trusted software base. According to the trusted computing platform provided by the invention, active safety protection is realized while computing is realized through the computing subsystem and the protection subsystem which are parallel to each other. In addition to establishing a static trust chain which takes a trusted platform control module as a trust root for step-by-step measurement, a dynamic measurement mechanism based on a security trusted strategy is also designed, and active defense on the whole computer system in the starting and operating processes of the computer is realized.

The invention relates to a drilling machine and particularly relates to a novel drilling machine for a carbon fiber composite plate. The technical problem to be solved by the invention is to provide the novel drilling machine for the carbon fiber composite plate, which is low in energy consumption, convenient to operate and high in drilling precision. In order to solve the technical problem, the invention provides such novel drilling machine for the carbon fiber composite plate, comprising a left frame, a bottom plate, a placing platform, a first rocking handle, a first bearing block, a first rotating shaft, a first bevel gear, a pressing block, a moving rod, a sleeve, an elastic element, a first fixed plate and the like; the left side of the top of the bottom plate is welded with the left frame; the middle of the top of the bottom plate is welded with the placing platform; and the upper end of the right side of the left frame is connected with the first bearing block in a bolt connection way. According to the novel drilling machine for the carbon fiber composite plate, the horizontal movement of a drill bit and the drilling operation for any position on the carbon fiber composite plate can be realized through rotating the first rocking handle, and the vertical movement of the drill bit can be realized through rotating a second rocking handle.

The invention belongs to the field of information safety and provides a role based dynamic database desensitization service method and system. The system comprises a parser for parsing SQL statements, a sensitive information setting unit for setting sensitive fields, desensitization functions and parameters for users of different roles, a sensitive information storage unit for storing a lookup table, a data processing unit for generating the desensitization functions in a database, obtaining user roles, verifying the integrity of the lookup table and modifying SELECT statements according to the requirements in the lookup table. In addition, the invention discloses the method, the method comprises the steps that the SQL statements are parsed through the parser, if the SQL statements are SELECT statements, the statements are submitted to the data processing unit for processing; if not, the statements are submitted to the database. Different sensitive fields and desensitization functions are set for the users of different roles, different desensitization functions can be also set for the same sensitive fields, the requirement for different sensitive data protection degrees of the users of different roles are met, and the diversification demand during provision of data service is met.

The embodiment of the invention provides a porous negative pole piece which comprises a porous current collector and an active substance deposited in a hole of the porous current collector, wherein the active substance is one or more of Si, Sn, Al, Sb, Ge, Zn, Pb, Mg, and Na, the hole is a through hole, and the active substance is deposited on the inner wall of the hole. The negative pole sheet is high in capacity and stable in structure, so that the system capacity of a lithium ion battery is finally increased, and the recycling service life of the battery is prolonged. The embodiment of the invention further provides a preparation method of the porous negative pole sheet, and the lithium ion battery comprising the porous negative pole sheet.

The invention discloses a microwave-assisted subcritical essential oil extracting method. The microwave-assisted subcritical essential oil extracting method includes the steps that fresh plant tissues are frozen and then are smashed; 1,1,1,2-tetrafluoroethane is used as an extraction solvent and is led into the smashed plant tissues to perform microwave extraction; during microwave extraction, the extraction temperature is controlled to be 8-12 DEG C, the extraction pressure is controlled to be 0.8-6 Mpa, the microwave frequency is controlled to be 300-2400 MHZ, and the power is controlled to be 200-1200w; after a liquid phase in the system is separated out and microwave extraction is completed, the 1,1,1,2-tetrafluoroethane is recovered from the liquid phase, and the rest of the liquid phase is an essential oil stock solution; the essential oil stock solution is subjected to molecular distillation to obtain essential oil. By the adoption of the microwave-assisted subcritical essential oil extracting method, the essential oil free of any residual solvent can be obtained at lower temperature, the effective ingredients of the essential oil are not destroyed, and the natural quality of the essential oil can be kept to the most degree.

This invention provides a switch protection method for links among satellites including: 1, generating service paths according to the service requirement of a terminal, 2, computing the interruption probability of each link in the service routes to select protection links for interruption protection, 3, setting up switch protection backup route between two switch nodes in the protection link, 4, when the protection link switches paths, it switches the current service between two nodes to said back up path. This invention applies a mode of resuming protection locally to recover the interrupted paths because of switch quickly to guarantee the durative of service communication and that related QoS target will not be broken.

The invention relates to a new energy automobile battery with a collision protection function. The new energy automobile battery comprises a protection shell, a battery box and a collision preventing assembly; the battery box comprises a box top, a battery pack, an air inlet pipe, a distribution box, a battery management module, a high-voltage wiring harness, a low-voltage wiring harness, a cooling fan, air outlet pipes and a base; the collision preventing assembly comprises guiding grooves, limiting units, a first airbag, a first ventilating pipe, a second airbag and a second ventilating pipe; each limiting unit comprises a first spring and a limiting block; when the new energy automobile is in collision, a safety airbag inflates the first airbag and the second airbag, so that the limiting block leaves the corresponding limiting hole; and the battery box slides on the guiding grooves with certain buffering, and then is collision with the first airbag to be detected, so that the rigid collision is greatly lowered, thereby protecting the new energy automobile battery with the collision protection function from being damaged, and ensuring the normal operation of the automobile.

The invention discloses porket creep feed and a production method thereof. The feed comprises the following components in percentage by weight: 30.0 expanded corns, 30.0 high-quality corns, 12.0 high-protein soybean meal, 4.5 whole milk powder, 4.0 fermentative soybean meal, 3.0 expanded soybeans, 3.0 Chilean white fish meal, 3.0 plasma protein powder, 3.0 acidifying agents, 2.0 sugar, 1.2 stone powder, 1.0 calcium dihydrogen phosphate, 1.0 grade-IV soyabean oil, 0.12 methionine, 0.4 lysine, 0.10 threonine, 0.18 salt, 1.0 porket additives and 0.5 medicament additives. The production method comprises the following steps: crushing the high-quality corns, the high-protein soybean meal and the Chilean white fish meal at one time, granulating at a high temperature and cooling; carrying out secondary crushing after the granulated and cooled high-quality corns, the high-protein soybean meal and the Chilean white fish meal are mixed with the expanded corns and the expanded soybeans; carrying out tertiary mixing with other components of the feed according to the weight percentage and granulating at a low temperature; and packaging and warehousing. The invention optimizes the quality of the porket creep feed, improves the stability and the palatability of the feed, strengthens the digestion and absorption and the availability of nutrition, promotes the health growth of porkets and effectively controls diarrhea, growth retardation, and the like.

The invention discloses a maca extract and a preparation method thereof. The maca extract is prepared by circularly extracting, purifying, concentrating and drying maca serving as a raw material, and comprises 30-40 percent of fatty acid, 18-25 percent of benzyl isothiocyanate and 13-20 percent of macamides and macaenes. The method comprises the following steps of: selecting non-rotten and non-moldy maca which is free from visible external impurities, and finely smashing dried root of maca, wherein the smashing particle size is that the smashed root can pass through a sieve of 60-100 meshes; putting the smashed raw material into an extracting tank, adding 7-9 times of a 50-90 percent alcohol solution, and circularly extracting at the temperature of 45-55 DEG C for 2-5 hours to obtain an extracting solution; putting the extracting solution into a depositing tank for naturally depositing for 6-10 hours, performing suction filtration on a supernatant in vacuum, and centrifuging a filtrate with a high-speed centrifuger at the revolving speed of 10,000-40,000 revolutions per minute; and concentrating a centrifugate in vacuum at the temperature of 40-55 DEG C till the relative density is 1.0-1.3, and drying at the temperature of 40-55 DEG C to obtain a maca extract. The extracting rate of the maca extract is increased greatly, the product purity is increased, and the activity is high.

The invention discloses a seal detecting production line. The seal detecting production line comprises a working platform, a conveying belt for products to be tested, a waste conveying belt, a seal detecting device, a mechanical arm, and a waste pushing mechanism. The mechanical arm is used for grabbing the products to be tested and enabling the products to be tested to pass in and out the seal detecting device. The waste pushing mechanism is used for enabling tested sub-quality products to be pushed into the waste conveying belt from the conveying belt for the products to be tested. The seal detecting production line enables the mechanical arm, the simple seal detecting device, and the product conveying belt to be combined together in an organic mode, a programmable logic controller (PLC) is utilized for controlling a working time sequence of each unit, and automation degree and system reliability are improved. The products to be tested can be effectively protected form being damaged, grabbing of the mechanical arm depends on the opening and the closing of an executor at the tail end, and the mechanical arm not only is suitable for grabbing canning products, box-packed products, and bottled products, but also can be used for grabbing bagged products, and is strong in generality.

The invention relates to soybean oil powder grease and a preparation method thereof. Concretely, soybean first-grade oil is used as a raw material to be used as core materials, a microencapsulation embedding technology is adopted, and a novel series soybean oil powder grease product with excellent processing characteristics and rich and mass nutrients is developed through the selection of an embedding agent, a filling agent and an emulsifying agent and the optimization of process conditions. The improvement is carried out on the trial test study, an industrialized production and test recipe is obtained. During the proportioning, the soybean oil powder grease comprises the following ingredients in percentage by weight: 9.25 percent to 27.25 percent of core material, 1.35 percent to 2.7 percent of embedding agent, 13.925 percent to 33.8375 percent of filling agent, 0.5625 percent to 1.125 percent of emulsifying agent and 55 percent of water. Compared with ordinary liquid-stage grease products, the product has various advantages that the quality guarantee period of the product is prolonged, the product functionality is improved, the product water solubility is improved, and the product application range is enlarged.

A connector housing heat radiation structure comprises a housing, a heat radiating plate and a buckling member. The first end of the buckling member is buckled and fixed with the top plate of the housing by means of a first tongue plate and a buckling plate, thereby reducing area of an opening on the top plate, and realizing relatively high EMI shielding effect. Two connecting arms of the buckling member penetrate through grooves in the heat radiating plate. Width of the heat radiation plate is not limited, and heat radiation area of the heat radiating plate can be increased. The second end of the buckling member is provided with a second tongue plate which is inserted into a bump at the back cover of the housing. Furthermore through making the abutting end of the second end abut against a backstop part, no easy loosening of the buckling member is realized. The buckling cannot be damaged in bearing pressing by a certain external force.

The invention relates to a flexible job-shop scheduling optimization method, which applies the Metropolis criterion and the sinusoidal adaptive step length to a firefly algorithm so as to optimize andsolve a discrete problem. On the basis of building a mathematical model, an initial solution population of a discrete combination problem is randomly generated, then local search in an individual domain is performed according to the Metropolis criterion in simulated annealing to generate a new individual, the internal energy difference between the new individual and the original individual is calculated, the new individual is accepted according to a certain probability, and global search is performed on each generation by using the discrete firefly algorithm with the sinusoidal adaptive steplength until an optimal solution is searched. The method can better search an optimal solution of the FJSP (Flexible Job-Shop Scheduling Problem) in the global space and has better search precision, search efficiency and stability, thereby having important significance and significant engineering practical application values for solving discrete problems such as job-shop scheduling.

The invention provides an active power factor correction system. Through arrangement of double protections, a first current protection is implemented when the current at a DC side exceeds a first current threshold, and a second current protection is implemented when the current exceeds a second current threshold. During the first current protection, the current at the DC side is not too high, when the voltage at an AC power supply passes zero next time, the output of a PWM pulse signal is restored; during the second current protection, the current at the DC side is high already, the output of the PWM pulse signal is stopped and then the PWM pulse signal is output again until a circuit is restored to be in a normal state, the PWM pulse signal output again is a newly adjusted PWM pulse signal, so that the circuit normally runs, and overcurrent is reduced. Current protection using software is more effective than protection using hardware. In this way, the possibility of PFC restarting can be reduced, and the circuit can run more stably and can be protected from being damaged due to overcurrent.

A process for producing a precision press-molding preform having a predetermined weight from a molten glass, wherein the molten glass is shaped into a glass gob and the above glass gob is etched to remove a surface layer of the glass gob to produce the precision press-molding preform formed of an optical glass having said weight, and further wherein said surface layer has a thickness of 0.5 mum or more.

The invention provides a method for extracting cornel iridoid glycoside by virtue of ultrasonic-microwave synergetic extraction. The method comprises the following steps: (1) preparing cornus officinalis coarse powder; (2) adding the cornus officinalis coarse powder into a 80% methanol solution in a material-liquid ratio of (1:5)-(1:25), sealing, weighing and determining the weight, connecting a condensing device, and extracting for 3-15 minutes with microwave power of 300-700W and ultrasonic powder of 120-600W to obtain an extract; (3) carrying out suction filtration on the extract to obtain filtrate, keeping the constant volume, filtering, concentrating, drying and purifying to obtain the cornel iridoid glycoside. A method for determining the cornel iridoid glycoside comprises the following steps: a, preparing a mixed reference substance solution; b, preparing a test substance solution; c, determining the contents of morroniside, loganin, sweroside and cornel iridoid glycoside in the mixed reference substance and the test substance; d, respectively calculating the contents of the four glycosides according to the result of liquid chromatographic analysis.

The invention discloses an extraction process of rose essence for cigarette, falling into the technical field of essence and flavoring extraction technique. The extraction process includes pretreating olive oil; immersing; ultrasonically extracting; filtering; extracting; freezing and concentrating under reduced pressure; and performing molecular distillation. In the extraction process, rose oil in rose leaves can be fully dissolved in the olive oil to improve extraction yield; and the olive oil is extracted by anhydrous ethanol for multiple times before being used to reduce impurities in the rose oil, thereby reducing or eliminating residue in oral cavity resulting from lipoids in essence for cigarette.

The invention discloses a concentrated sea-buckthorn clear juice and a preparation method thereof. The preparation method comprises the following steps: (1) washing, crushing, enzymatically hydrolyzing and squeezing sea-buckthorn fruits orderly, separating out fruit residue to obtain a raw sea-buckthorn juice, and rehydrating the fruit residue and squeezing again to obtain the raw sea-buckthorn juice; (2) pasteurizing the sea-buckthorn juice, adding an enzymic preparation for further enzymatic hydrolysis, and separating out the extracted sea-buckthorn fruit oil to obtain the sea-buckthorn juice; (3) orderly performing ultrafiltration, decoloration, reverse osmosis membrane concentration and concentration by use of a quadruple effect vacuum evaporator on the sea-buckthorn juice, thereby obtaining the concentrated sea-buckthorn clear juice. According to the preparation method of the concentrated sea-buckthorn clear juice, twice enzymatic hydrolysis, twice squeezing and twice concentration are adopted in the process of preparing the concentrated sea-buckthorn clear juice, and therefore, the fruit juice extraction rate is increased and nutritional ingredients in the fruit juice are not damaged and lost; meanwhile, the preparation method is energy-saving, low in consumption and low in production cost; the prepared sea-buckthorn clear juice has relatively high sugar degree, acidity, color value and light transmittance, and is stable in quality and easy to store.

The invention discloses conductive hydrogel. The conductive hydrogel comprises a double-network structure, wherein a first network is a physically cross-linked polysaccharide network; the second network is a polymer network; the polymer network is cross-linked through micelles. The conductive hydrogel has high-strength tensile property and good stress-strain sensing property, and can be used as various flexible sensing devices.

The present invention discloses an underwater robot four-dimensional fingertip force sensor and information obtaining method thereof; the sensor comprises mutually connected base, upper cover, sealing ring, fingertip, elastomer, measuring circuit board and digital hardware circuit board. The E-shaped film of the elastomer induces the normal force Fz, tangential force Fx, Fy of contacting face of the paw; the thin rectangle metal sheet induces the torque Mz around the normal; the detecting circuit composed by strain foil stuck on the elastomer converts the change caused by force and moment of the sensor into change of voltage. In the method, the change of the voltage is executed signal conditioning via the measuring circuit board integrated on the sensor, and the four-dimensional force information is sent to the underwater robot body through the analog-to-digital conversion, digital filtering, numerical calculation and decoupling of the digital hardware circuit board via the communication interface. The present invention uses screw fluid sealant to encrypt so as to realize underwater sealing, uses silica gel and round metal soleplate to realize deep underwater automatic pressure compensation; the present invention is able to obtain the four-dimensional force subjected by the intelligent paw of the underwater robot.

The invention relates to a method for preparing a carbon nano tube enhanced titanium-base compound material by in-suit reaction in order to solve the problems of low uniform dispersion and low structural completeness of a carbon nano tube in the conventional method for preparing the carbon nano tube enhanced titanium-base compound material and pollution to the titanium-base material caused by reaction of a carbon group and a titanium base body. The method comprises the following steps of: adding nickel nitrate hexahydrate and TiH2 powder into an ethanol solution, stirring and evaporating to obtain Ni-TiH2 compound powder; paving the Ni-TiH2 compound powder in a quartz boat, putting the quartz boat into deposition equipment, feeding H2, raising temperature, feeding CH4, and after the deposition is finished, stopping feeding the CH4 so as to obtain carbon nano tube / TiH2 compound power; pressing the carbon nano tube / TiH2 compound power into a block body, sintering, and re-pressing to obtain the carbon nano tube enhanced titanium-base compound material. Carbon nano tubes in the compound material are uniform to disperse and cannot be aggregated; the compound material is high in purity and has a complete structure; and reaction between the titanium and the defected carbon nano tube can be avoided.

The invention relates to an explosive welding method for a copper-aluminum composite material. An aluminum composite plate (4) is arranged on a copper substrate (6) in a parallel mode through a supporting object (5), a rubber buffering layer (3) is laid on the aluminum composite plate (4), rock ammonium nitrate explosive cloth number two is arranged on a rubber buffering layer (3), the copper substrate (6) is arranged on a rubber cushion layer (7), a medium-fine sand foundation (8) is located below the rubber cushion layer (7), and the copper-aluminum composite material is obtained through explosive welding. A copper-aluminum composite plate produced through the explosive welding method can achieve 100% welding composite rate, is evenly formed in a composite mode without the phenomena of layering, swelling, vortex and the like.

The invention relates to a platinum supported catalyst based on a porous graphene / nano ceramic sandwiched structure and a preparation method thereof. The platinum supported catalyst includes a porous graphene / nano ceramic carrier with a sandwiched structure and platinum nanoparticles uniformly deposited on the surface of the carrier; the porous graphene / nano ceramic carrier with the sandwiched structure takes porous graphene as a surface layer, and a nano ceramic as a core material is inserted into porous graphene sheet layers. Nanopores in the porous graphene are beneficial for axial transport and electron and proton conduction of water and reaction gas, so that the catalyst component utilization rate is improved, and the use amount of platinum is reduced; the porous graphene / nano ceramic sandwiched structure effectively provides platinum loading sites, migration aggregation of the platinum nanoparticles on the surface of the carrier is limited, and the stability of the catalyst is improved.

The invention discloses a preparation method of an instant canned edible bird's nest soup. The method comprises the following steps of S1, soaking, wherein high-quality edible bird's nests are placedin pure water and soaked for 2-8 hours at 10 DEG C or below, after soaking, filtration is conducted, and soaking water is refrigerated for standby use; S2, feather picking-out, wherein swallow feathers in the soaked edible bird's nests are manually picked out, and the soaked edible bird's nests are obtained; S3, canning, wherein the soaked edible bird's nests with the certain weight are weighed and added into rock candy water, cap screwing and vacuum sealing are conducted, and semi-finished edible bird's nest soup products are obtained; S4, sterilization, wherein primary sterilization is conducted, that is, firstly, a sterilization cooker is heated to 70-80 DEG C, and then the semi-finished edible bird's nest soup products are put in the sterilization cooker for being cooked for 15-45 minutes; secondary sterilization is conducted, that is, after cooking, the temperature is increased to 121 DEG C, after sterilization is conducted for 3-10 minutes, the semi-finished products are cooled and fished out, and the instant canned edible bird's nest soup is obtained. According to the method, separate sterilization is conducted twice, by adopting the sterilization mode, the possibility of melting of the edible bird's nests in water is reduced, and therefore addition of food additives is reduced, the instant canned edible bird's nest soup presents an original egg white taste of the ediblebird's nests, and the greener, more environmentally friendly and more economical purpose is achieved.

The invention provides a data updating method in a comparison system, which comprises the steps of: creating an internal memory cache region in a physical internal memory, and loading updated data and information items thereof in the internal memory cache region; and looking up a corresponding current index in a local disk according to the information items, and performing an updating operation. In order to realize the data updating method in comparison system, the invention also provides a data updating device in comparison system, which comprises a creating unit used for creating the internal memory cache region in the physical internal memory; a loading unit used for loading the updated data and the information items thereof in the internal memory cache region; a searching unit used for looking up the corresponding current index in the local disk according to the information items; and an updating unit used for performing the updating operation. The data updating method in comparison system and the data updating device in comparison system have the advantages of avoiding large scale data updating delay, and comparing the updated data in real time so as to obtain a more accurate comparison result.

The invention discloses a kind of extraction method and device. The method includes following steps: crushing and immersing the materials, carries on extraction under pressure of 25MPa-35MPa and frequency between 18 KHz-33 KHz by using water as solvent, the extraction liquid with material active ingredients can be gotten. The invention can protect the biology activity, and it can realize nearly fully extraction of ingredients.

The invention belongs to the technical field of sludge recycling / resource utilization, particularly relates to a lightweight ceramicite prepared from municipal sludge and printing / dyeing sludge. The lightweight ceramicite prepared from municipal sludge and printing / dyeing sludge provided by the invention is prepared from the following raw materials in percentage by weight: 30-50% of granular sludge, 30-50% of printing / dyeing granular sludge, 10-15% of fly ash, 2-6% of limestone, and 1-4% of iron powder; the lightweight ceramicite prepared according to the formula above has the advantages of light weight, good mechanical performance, environmentally-friendly and easily obtainable raw materials and low production cost; and the manufacturing method has the advantages of simplicity and high production efficiency.

The invention provides an application of an uncinata spikemoss herb extract in preparing an anti-hypoxic and an anti-oxidation medicine. The uncinata spikemoss herb extract contains a non-flavonoid extract of the uncinata spikemoss herb or a total flavonoid extract of the uncinata spikemoss herb or the mixture of the two. The invention further provides a preparation method of the uncinata spikemoss herb extract, which comprises the following steps: the dry uncinata spikemoss herb is crushed and extracted by refluxing with an aqueous solvent to obtain an extracting solution; the extracting solution is filtrated or centrifuged to remove insoluble substances, and then decompressed and dried to obtain the crude extract of the uncinata spikemoss herb; then macroporous resin open column chromatography is applied to the crude extract of the uncinata spikemoss herb, and the crude extract is eluted with ethanol aqueous solution with the volume percent being 30 percent so as to obtain the non-flavonoid extract of the uncinata spikemoss herb, and eluted with the ethanol aqueous solution with the volume percent being 30 percent to obtain the total flavonoid extract of the uncinata spikemoss herb.

The invention provides a construction method of underground water prevention and exterior wall structures of narrow space of a deep foundation pit. The construction method is used for a construction project of a deep foundation pit with narrow space in an urban center, concrete of a reserved trough is poured by single-side formworks arranged outside slope protection piles, a water prevention construction operation surface with outside prevention and inside attachment is formed, and meanwhile, the problem of backfilling of the reserved trough is solved; then construction of an exterior wall structure is carried out by the single-side formworks again; the problem that construction of exterior water prevention of the exterior wall, soil backfilling of the reserved trough, underground water prevention rolls and an underground structure exterior wall cannot be carried out due to insufficient space under the special condition is solved, water prevention construction of the exterior wall of a basement can be smoothly carried out effectively, and leakage is prevented. The construction method is clear in construction sequence and good in construction water prevention effect.