169results about How to "Solve the leakage problem" patented technology

The invention relates to a file breaking encryption-based file security protection method. The method comprises the following steps: breaking an original file into a plurality of fragments with variable lengths by a filter driver according to a specific broken algorithm; carrying out transparent encryption processing on all the fragments by using an encryption algorithm according an encryption strategy; and then storing cryptograph fragments into a fragment cloud storage server. According to the invention, the beneficial effects of the method are as follows: because any original file in any mode including an encrypted mode or an unencrypted mode does not exist locally, the possibility of restoring of the original file from incomplete cryptograph fragments is almost zero, thereby solving a problem of leaking at a client fundamentally.

The invention discloses a duplicate coding internet of things traceability security label, comprising a 2-dimensional bar code, an upper layer label and a lower layer label. The 2-dimensional bar code comprises a 2-dimensional bar code external code and a 2-dimensional bar code internal code, wherein the 2-dimensional bar code external code is arranged on the upper layer label and used for goods traceablility querying; the 2-dimensional bar code internal code is arranged on the lower layer label and used for security verification; the upper layer label and the lower layer label only have edges jointed, and the upper layer label is provided with a tearing port; the 2-dimensional bar code internal code is used for a consumer to perform network security verification through handset scanning, the security verification being performed only once. After security verification, the security function of the 2-dimensional bar code internal code is immediately disabled, and scanning the 2-dimensional bar code internal code is equal to scanning a torn 2-dimensional bar code external code. The invention also discloses a 2-dimensional bar code security traceability method which is hard to copy and has high security.

The invention discloses an uncured polyurethane waterproofing coating and a preparation method thereof, belonging to the technical field of polyurethane waterproofing coatings. The uncured polyurethane waterproofing coating is prepared from the following raw materials in percentage by weight: 13-20% of prepolymer, 30-65% of asphalt, 1.0-1.5% of latent curing agent, 3-15% of compatilizer, 2-9% of thermoplastic elastomer and 0-3% of powder stuffing, wherein prepolymer is a substance synthesized by reaction between polyether and isocyanate. The uncured polyurethane waterproofing coating mainly aims to improve the material proportion and polymerization process of polyurethane, and the problem that a hot-melted asphalt material is needed to be heated by using a machine is solved; the uncured polyurethane waterproofing coating is convenient in construction and good in flowability; the viscosity of the constructed material can be automatically enhanced, so that the constructed material can become an elastic plastic body and a favorable waterproofing layer without internal stresses; in addition, the uncured polyurethane waterproofing coating can be well bonded with a coiled material and can be compounded to be waterproof so as to form a waterproofing layer capable of overcoming tension fracture caused by basement layer cracking and preventing puncturing; the uncured polyurethane waterproofing coating is simple and convenient in process, rapid in construction, free of maintenance, high in working efficiency and capable of becoming the development direction of building waterproofing in the further.

The invention discloses a plugging and leakage-proof construction method of a kitchen and toilet flue and a water supply and drainage pipeline edge, belonging to a building construction method. The method comprises the following construction steps of: 1, preparing materials; 2, treating a reserved hole base layer, the flue and the pipeline; 3, proportioning and stirring plugging concrete; 4, pouring, plugging and cuing; and 5, managing at a later stage of construction, wherein the plugging concrete (C20) comprises cement, water, sand, stone and an expanding agent according to a mass ratio of 1:0.55:1.62:3.0:0.1; and the concrete plugging step comprises the following sub-steps of: (1) pouring a first layer of plugging concrete; (2) embedding a leak stopping master layer; and (3) pouring a second layer of plugging concrete. The method is easy and convenient to operate and quick in construction progress; and the problem of extremely high probability of leakage of the kitchen and toilet flue and the water supply and drainage pipeline edge is effectively solved.

The invention discloses a method for controlling leakage of a grouting treatment vertical type asphalt concrete core wall earth-rock dam. The method comprises the steps of first collecting, arranging and analyzing dam technical data, and drawing up a grouting range, grouting hole arrangement and grouting curtain body design indexes; carrying out slurry tests and on-site grouting tests; selecting a device according to slurry test results, manufacturing grouting slurry, performing segmentation and row drilling on an upstream transition layer at a dam crest, and sequentially drilling upstream row grouting holes, middle row grouting holes and downstream row grouting holes in the upstream transition layer from one side of an upstream rockfill material dam shell to an asphalt concrete core wall; and finally performing hole sealing treatment after quality inspection. The method has simplicity in arrangement; under the conditions that a reservoir cannot be emptied, the problem of the leakage of the vertical type asphalt concrete core wall earth-rock dam can be effectively solved, the reservoir can run normally, and dam body safety is guaranteed. Engineering project implementation treatment proves that the method is feasible, safe, reliable and good in leakage treatment effect.

The invention discloses a water supply pipe network management system. The system comprises a DMA life cycle management module and a DMA data analysis module, wherein the DMA life cycle management module comprises a DMA engineering management unit, a DMA management ceiling unit, a DMA maturity grading unit and a DMA consultative management unit; and the DMA data analysis module comprises a DMA leakage and loss source analysis unit, a new loss alarming unit and a zoning evaluation unit. The water supply pipe network management system provided by the invention is a Smart DMA, which fully utilizes a large amount of data recorded by the system; through technologies such as a self-developed algorithm, a simulation technology, a clustering algorithm, a chaos genetic algorithm, an interactive query and the like, useful information is extracted and specifically used for guiding practical production and marketing and leakage management; application scenes and specifications are deeply and effectively mined, so that the leakage control difference management is realized and the working efficiency is improved; and multiple technical means are adopted in the aspects of solving the leakage problem and saving water, so that the input cost is effectively reduced.

The invention discloses a security distributed data management method based on a public cloud. The security distributed data management method comprises the following steps: assuming that m public cloud spaces exist, extracting a storage directory structure on a local computer, encrypting all files in a directory, dividing each encrypted file into m blocks, sharing and dividing key secrets into m blocks, respectively sending the files and the key blocks into the m public cloud spaces, and sharing directory tree secrets into the m public cloud spaces. In the event of searching a specific file and downloading a file, a directory tree is fetched and restored from any n public cloud spaces at first, wherein n is less than m; the file is searched from the directory tree; then, sub-file blocks and sub-key blocks are continuously fetched from the n public cloud spaces according to the searching result; the file blocks are combined; simultaneously, a key is recovered; and finally, an original file is obtained by decrypting the file. By means of the technical scheme provided by the invention, data information in any insufficient n public cloud spaces is insufficient to recover the original file; therefore, the data information security is increased; and the risk in leaking user data information is reduced.

The invention provides a non-cross-linked gel plugging system which comprises a non-cross-linked polymer and an aqueous solution, wherein the mass of the non-cross-linked polymer is 0.5%-5.0% of the mass of the non-cross-linked gel plugging system. Compared with the prior art, the non-cross-linked polymer in the non-cross-linked gel plugging system provided by the invention can form a gel in the manner of physical cross-linking; the gel has difficulty in being mixed with oil, gas and water, has a better pumping performance, can easily enter into a crack and can automatically fix; the formation fluid can be fully discharged; the gel can effectively occupy and fill the seam and hole spaces of the underground leakage layer; a 'sectional plug' capable of fully isolating the formation fluid from the well hole is formed in the stratum, has a certain static yield stress and elasticity and is capable of regulating the starting pressure gradient; the gel plugging system provided by the invention can be independently used and can be used together with the other additives; different injection manners can be taken for solving various well leakage problems.

The invention provides a leaking stoppage barrel and leaking stoppage slurry combined leaking stoppage method specific to a fractured formation. The method comprises the following steps that whether leakage is fractured leakage or not is judged, and the position of a leakage layer is determined; a leaking stoppage barrel is machined; the leaking stoppage barrel is driven into the position below the drilling fluid level in a well; when the leaking stoppage barrel is driven into the upper portion of a leakage layer well section, water ways are filled in the position 30-50 m away from the leakage layer, and filler in the barrel is ejected and released by starting a pump; leaking stoppage slurry is driven into a drill stem, and substitutive slurry is in place; and the leaking stoppage slurry is driven into the drill stem, so that the fillers and the leaking stoppage slurry enter the leakage layer, and leaking stoppage is achieved. According to the leaking stoppage barrel and leaking stoppage slurry combined leaking stoppage method specific to the fractured formation, the leaking stoppage measurement and technical problems in vicious well leakage are solved, especially for the fractured formation leakage, the leaking stoppage method is effective, and the well leakage of the fractured formation is well solved.

The invention relates to the technical field of membrane separation and particularly relates to and discloses a flaky curtain type membrane packaging and leaking stoppage process. The flaky curtain type membrane packaging and leaking stoppage process includes the following steps of pre-packaging, wherein the lower ends of membrane filaments are cut to be flat, holes are blocked, the membrane filaments are vertically arranged in an open packaging box, first glue layer liquid is poured, and standing for curing is carried out; secondary packaging, wherein the membrane filament holes in the end face of the packaging box are cut open, the packaging box is inserted into a step inside a water collecting pipe and is sealed and bound, second glue layer liquid is poured on a first glue layer, and standing for curing is carried out; forming of a protective layer, wherein third glue layer liquid continues to be poured, and standing for curing is carried out; leaking stoppage, wherein gas leakage detection is carried out, cutting off is carried out at a leaking point, pyrocondensation materials are sleeved with the two ends, heating is carried out, leakage detection is carried out again till no abnormality exists, and a finished flaky curtain type membrane is prepared. According to the flaky curtain type membrane packaging and leaking stoppage process, through three times of glue layer pouring, packaging efficiency is guaranteed, the problem of leaking points caused by root filament breakage is effectively solved, packaging quality is guaranteed, packaging is attractive and free of flaws and knotting, cost is low, efficiency is high, and the process is suitable for volume production.

The invention discloses a distributed attribute-based encryption method supporting fine-grit attribute revocation on lattice, and belongs to the field of the information security. The method comprisesthe following steps: at the system initialization stage: the linear secret sharing is performed on a target vector at a system initialization stage, a sub-secret sharing value is served as a privatekey of a corresponding attribute authorization mechanism, and the attribute authorization mechanism establishes the corresponding binary revocation tree for the managed system attribute; at the user attribute key and the update key generation stage: the attribute authorization mechanism obtains the secondary sub-secret sharing value of the user attribute by using secondary linear secret sharing, and the computes the user attribute key and the user attribute update key through a primary image extraction algorithm and a left-sampling algorithm; at the encryption stage: an encryption party computes the ciphertext of the message by using the Gaussian noise, the encrypted and preprocessed noise vector and the system public parameter; at the decryption: a decryption party decrypts the ciphertextby using the user attribute key and the user attribute update key. The method disclosed by the invention is high in security, flexible in access policy and supports the fine-grit attribute permissionrevocation.

The invention discloses a system and a method for encrypting short messages by using a mobile phone terminal. The system comprises a secret mail box management module arranged on a main board of the mobile phone, wherein the secret mail box management module comprises a password management sub-module used for setting, modifying, deleting and verifying short a message password of a user, an information-to-be-sent encryption sub-module used for encrypting the short messages edited by the user and a received information decryption sub-module used for decrypting the encrypted short messages received by the user. The system has the advantages of solving the problem of information content reveal existing in the communication process, realizing one-to-many secure communication, and having a function of sending the edited short messages at a scheduled time.

The invention is applicable to the technical field of communication, and provides a message pushing method, a message pushing system, a message proxy server and a piece of terminal equipment. The method comprises the following steps: a message proxy server receives and stores a push message sent by an application server; the message proxy server generates an intermediate message according to the push message; and the message proxy server sends the intermediate message to a message pushing server to enable the message pushing server to forward the intermediate message to a piece of terminal equipment, and then, the terminal equipment acquires the push message from the message proxy server according to the intermediate message. According to the invention, the message proxy server temporarily stores a push message sent by the application server and generates an intermediate message, and the message received by the pushing server is the intermediate message. Therefore, the pushing server cannot receive the plaintext of the push message, and the problem that the content of a push message of a sensitive enterprise may leak can be solved.

The invention discloses a seepage-preventing blocking structure and method for a screw hole of a concrete shear wall, and belongs to the technical field of seepage prevention of concrete shear walls.The seepage-preventing blocking structure comprises a polyurethane foaming agent arranged in the screw hole, asbestos cement arranged in an expansion hole, a waterproof material which is applied to the outer side of a wall body of the concrete shear wall through brushing and covers the asbestos cement as well as dry and hard cement mortar arranged in the screw hole in the inner side of the wall body of the concrete shear wall in a filling manner. According to the seepage-preventing blocking structure and method, the expansion hole is formed, the asbestos cement is arranged in the expansion hole for blockage, the polyurethane foaming agent is injected into the screw hole, the outer side of the shear wall is brushed with the waterproof material, and a compact structure is formed at the screwhole of a pull screw, so that the purposes of completely eradicating seepage of the screw hole and improving the project quality are achieved.

The invention discloses a mail attachment processing method and a mail attachment processing device. The method comprises the steps that an attachment is encrypted to acquire an encrypted file; a plaintext abstract of the attachment is computed; whether the plaintext abstract exists on a server is detected; the encrypted file is divided into a plurality of subfiles according to a preset size under the condition that the plaintext abstract does not exist on the server; and all the subfiles are uploaded to the server. According to the method and the device, the mail attachment can be uploaded to the server after encrypted, so that the problem that a secret is divulged due to the fact that the plaintext sendmail attachment has risks of being divulged and browsed is solved, encrypted uploading and sending of the oversized attachment are achieved, the attachment can be transmitted safely, and the secret of a mail is prevented from being divulged.

The invention discloses an anti-seepage structure and an anti-seepage treatment method for a surface mine pit bottom, and belongs to the technical field of mining. According to the anti-seepage structure for the surface mine pit bottom, the surface pit bottom is upwards sequentially paved with a lower cushion layer, a geomembrane, an upper cushion layer and a protective layer. The anti-seepage treatment method comprises the following steps: treating the surface pit bottom; treating the lower cushion layer; treating the geomembrane; treating the upper cushion layer; and treating the protective layer. According to the anti-seepage structure and the anti-seepage treatment method disclosed by the invention, the leakage problem of the surface mine pit bottom is solved with low cost, the anti-seepage effect is good, and the problems that under-mine water inflow is increased, under-mine water draining cost is increased, and even a mine flooding accident is possibly generated under a severe condition due to the fact surface water enters underground rocks along shallow broken gaps and floods into the pit along original small fractures when a lower ore body of the surface pit bottom is exploited after the surface mining is ended is effectively avoided.

The invention discloses an airless spraying coater, comprising an air cylinder, a chassis, an air distributing block assembly, a reversing chamber assembly, a pump base assembly, a paint cylinder, a suction valve body, an output joint, a filter assembly, an air inlet joint, an air inlet tee, an air inlet filter core, an oil-mist device and an air inlet hose. The air cylinder is detachably connected with the air distributing block assembly. An air inlet channel, an air outlet channel and a reversing channel, which are capable of communicating the interior of the air cylinder with the air distributing block assembly, are respectively arranged at the top of the air cylinder and the chassis. An air inlet for allowing the entering of air is arranged on the side wall of the reversing chamber assembly. By using the structure, the invention has the advantages that the invention has a rational structural design and long service life, saves energy sources, does not easily go wrong, and can improve coating quality.

The invention relates to battery core folding equipment. The battery core folding equipment is provided with a primary folding device, wherein an upper mould of the primary folding device is provided with a plurality of upper pressing plates which are arranged at intervals; a lower mould is provided with a plurality of lower pressing plates which are arranged at intervals; the interval arrangement of the upper pressing plates and the interval arrangement of the lower pressing plates are matched in a staggered manner so that a regular fold is formed at the hot sealing edge of a battery core arc-shaped edge subjected to the primary folding; then a 90-degree folding device can be used for carrying out secondary folding and the arc-shaped hot sealing edge of a battery core can be orderly folded and turned up; a condition that the hot sealing edge is folded together so that the sealing edge is seriously extended outwards or a packaging film is broken by the folding device does not occur, and the difficulty that the folding edge of a current arc-shaped flexible package lithium battery leaks liquid is completely solved.

The invention provides a secure network storage method and a secure network storage system. The secure network storage system mainly comprises a storage node module and a network storage management module. The network storage management module comprises a storage unit and a network management unit. The storage node module is used for caching storage files uploaded to a client-side to a designated region and then performing encryption, and caching the storage files the designated region to perform encryption and display the storage files for an access client-side. The storage unit is used for storing and updating encrypted storage files. The network management unit is used for setting operating authorization of the storage files, performing authentication to an uploaded request, monitoring and recording operating process of the access client-side and automatically generating a report form. The secure network storage method and the secure network storage system can simplify setting of administration authority, prevent the files from being uploaded repeatedly, effectively utilize a storage space, prevent users from uploading illegal script files and modifying the storage files, monitor and record operation of access users and prevent stored data from being lost and breached.

The invention discloses an enclosed smoke-absorbing automatic frying apparatus which is characterized in that: a smoke-absorbing hood is connected to an oil-gas separator and a suction ventilator through a pipeline. The suction ventilator may be mounted outside the kitchen or any position so as to achieve a sound off effect. The smoke-absorbing hood has one side provided with a self-rotating stirring bamboo strip and a decelerating electrical machine, and the other side provided with a movable glass door which is provided with a dish feeding opening thereon, thus achieving the purpose of full enclosure. There are also provided with a self-rotating pan rack and a decelerating electric motor which pair with a stirring apparatus. When not used for frying, the frying apparatus can boil water to 90 DEG C by replacing a frying pan with a heat absorbing coiled tube. The frying apparatus can realize automatic frying, bathing water heating, water boiling, and the like. The frying apparatus not only can be mounted on old cooking ranges, and can be produced and sold together with paired stoves, which addresses the problems of indoor and outdoor pollution and manual frying.

The invention discloses a sub-cylinder type rotary cylinder static pressure fried dough twist making machine and relates to a food processing machine which can solve the problems of dough leakage and heating of the conventional fried dough twist making machine. The sub-cylinder type rotary cylinder static pressure fried dough twist making machine disclosed by the invention is characterized in that a rotary connecting disc of a dough pressing and shaping device is connected with a push rod of an oil cylinder through a bearing, a rotary dough pressing sheet is connected with a connecting support rod of the rotary connecting disc through the bearing, a rotary dough cylinder is fixed in a rotary cylinder through a pressure bearing, the rotary cylinder is fixed on a platform through the bearing, a shaping mold sheet is arranged at the lower end of the rotary dough cylinder, the lower part of the rotary dough cylinder is connected with an external gear, the external gear is meshed with an internal gear disc, the internal gear disc is fixed on a frame, a fried dough twist synthesis bucket is arranged below the internal gear disc, and the rotary cylinder is directly driven by a hydraulic motor. The sub-cylinder type rotary cylinder static pressure fried dough twist making machine disclosed by the invention has the advantages that failure rate is reduced during operation of a mechanism, heating generated by relative motion is prevented from damaging the internal structure of a fermented dough and the quality of fried dough twists is improved.

The invention discloses a security label-based USB anti-ferry method. The method comprises the following steps of: automatically operating a trusted process when a system is started, and loading a file filtering drive program, an application layer filtering hook and a kernel protection program; when a user uses an external USB storage medium, sensing insertion and pulling out of the USB storage medium by the file filtering drive program, recording the current state of the system, controlling the read-only authority, for the USB storage medium of an un-trusted process, and forbidding the loading operation of an executable file in the USB storage medium; generating a secret-involved file by the user and adding a security label for a to-be-transmitted file; copying the file with the security label to the USB storage medium by the user through the trusted process; and protecting the trusted process by adoption of the kernel protection program. The method disclosed by the invention is higher in security, lower in cost and better in user experience.

The invention relates to a tube bundle supporting member for a shell-and-tube heat exchanger. The tube bundle supporting member comprises supporting holes. The supporting holes further include standard supporting holes and auxiliary supporting holes. Supporting lines and connecting lines identical in number are sequentially connected in an adjacent mode to form the sealing contour lines of the cross sections of the supporting holes. The tube bundle supporting member is characterized in that the connecting lines are concave curves formed by line segments or line segments and camber lines or camber lines, each standard supporting hole at least comprises one basic pipe distribution unit formed by three adjacent heat exchange tubes, each auxiliary supporting hole can at least accommodate one heat exchange tube, the number of the heat exchange tubes accommodated in one auxiliary supporting hole is less than that of the heat exchange tubes accommodated in one standard supporting hole. By the tube bundle supporting member, the problem of flow leakage at the edge of a tube distribution area is solved, tube distribution compact degree is increased, and overall heat exchange efficiency is improved.

The invention discloses a magnetic stirring bioreactor and a magnetic stirring system, which comprises a magnetic steel driving disc, a magnetic steel driven disc, a fixed shaft, a stirring shaft, a stirring paddle and a positioning piece, wherein the magnetic steel driving disc is arranged outside a reaction cavity and rotates under the action of a driving force; the magnetic steel driven disc is arranged in a reaction cavity and at the bottom of the reaction cavity; the stirring shaft is arranged in the reaction cavity and fixedly connected with the magnetic steel driven disc and is sleevedon the fixed shaft together with the magnetic steel driven disc; the stirring paddle is arranged on the stirring shaft; and the positioning piece is arranged on the stirring shaft and pressed againstthe fixed shaft for regulating the distance between the magnetic steel driven disc and the magnetic steel driving disc. In the invention, a static seal magnetic force-driven stirring shaft without dynamic shaft seal feeding is used to reduce the chance for microbiological contamination and solve the leakage problem of the medium in the reactor. In addition, with a single-end supporting structure,the magnetic stirring bioreactor can be installed and cleaned more conveniently, and the structure of the reactor is more reasonable.

The invention discloses an access monitoring method and an access monitoring device of movable equipment. The method comprises the following steps of: presetting a list of legal movable equipment information in a security control server, wherein the security control server is used for controlling security of a client connected with the security control server, and the list of the legal movable equipment information comprises unique identifiers of the movable equipment allowed to be accessed; calculating the unique identifier of one movable equipment when the client monitors that the movable equipment is accessed; and transmitting the unique identifier to the security control server, judging whether the unique identifier exists in the list of the legal movable equipment information by the security control server, allowing access of the movable equipment if the unique identifier exists in the list of the legal movable equipment information, and refusing the access of the movable equipment if the unique identifier does not exist in the list of the legal movable equipment information. According to the access monitoring method and the access monitoring device, the source and the destination of data can be accurately tracked, the data can be prevented from being infected by virus, the security for use of the movable equipment is improved, and the security of network information is guaranteed.

The invention discloses a rheological stabilizer for a synthetic base drilling fluid and a preparation method thereof. The method comprises the following steps: in the inert atmosphere, an allyl monomer is subject to copolymerization to obtain the rheological stabilizer under the condition that both an organic solvent and an initiator exist; the allyl monomer is at least one of the unsaturated fatty acid with carboxyl, long carbon chain acrylamide and phenethylene compound. The rheological stabilizer is suitable for preparing a deepwater synthetic base drilling fluid; after the stabilizer is added, the shearing force of a drilling fluid system is less influenced by temperature change. The rheological stabilizer can solve the problems of high ECD (Equivalent Circulating Density) value, circulation loss, difficulty in pressure control and the like, which are caused by great difference between the rheology behaviors of the conventional synthetic base drilling fluid under low-temperature and high-temperature conditions, so as to better adapt to deepwater drilling requirements. The rheological stabilizer provided by the invention has excellent compatibility with other additive for drilling fluids.

The invention relates to a non-curing polyurethane waterproof coating and a preparation method thereof, belonging to the technical field of polyurethane waterproof coating. It consists of the following raw materials in percentage by weight: prepolymer 13-20%, asphalt 30-65%, latent curing agent 1.0-1.5%, compatibilizer 3-15%, thermoplastic elastomer 2-9%, powder Sexual filler 0-30%, the prepolymer is a reaction composition of polyether and isocyanate. The core of the invention improves the material ratio and polymerization process of polyurethane, which overcomes the problems that hot-melt asphalt materials need to be heated by machines, etc. It is convenient for construction and has good fluidity. The waterproof layer without internal stress can also have good adhesion with the coiled material. It can be composited waterproof to form a waterproof layer that overcomes the cracking of the base layer and prevents puncture. The process is simple and can be quickly constructed. It needs maintenance and has fast work efficiency, which can become the development direction of building waterproofing in the future.

The invention discloses an electronic equipment-detecting access control apparatus and method, belonging to the field of information safety monitoring and controlling. The apparatus is such configured that an electronic equipment-detecting unit (10) is arranged in a doorframe (00); a high-definition network camera (70) and a wing gate (80) are arranged behind the doorframe (00); the lens of the high-definition network camera (70) is aligned with a to-be-inspected person; the electronic equipment-detecting unit (10), an alarming unit (30) and a RFID reading-writing card unit (50) are separately connected with a visual operation control unit (20); an access controller (60) and the high-definition network camera (70) are separately connected with the visual operation control unit (20) through a network switching unit (40); and the access controller (60) is connected with the wing gate (80). The electronic equipment-detecting access control apparatus and method provided by the invention overcome the problem divulgence caused by electronic equipment and are high in accuracy and good in reliability and stability.

The invention discloses an agent for leak prevention and leak stoppage while drilling and a preparation process thereof. The agent for leak prevention and leak stoppage comprises the following components: 30 + / - 1% of silicon oxide, 15 + / - 1% of alumina, 15 + / - 1% of calcium oxide, 15 + / - 1% of bentonite, 5 + / - 1% of expansion powder, 10 + / - 1% of sodium alginate and 10 + / - 1% of organic fiber. The preparation process comprises the following steps: mixing the silicon oxide, alumina, calcium oxide, bentonite, expansion powder and sodium alginate according to the above-mentioned proportion; then grinding the prepared mixture to particles with a particle size reaching 1 to 1000 [mu]m; and finally, subjecting the prepared material and the organic fiber to uniform stirring and mixing at the mass ratio of the prepared material to the organic fiber being 9: 1 so as to prepare the sample product. The agent for leak prevention and leak stoppage provided by the invention can be applied in micron-scale or even nano-scale materials for plugging while drilling, can rapidly form mud cakes or realize self-adaptive plugging of microfractures with different widths, and prevents further expansion of hydraulic fracturing action, thereby achieving the purposes of leak prevention and leak stoppage while drilling.