420results about How to "Reduce the risk of use" patented technology

The present invention is green alkaline paint remover for eliminating coating from electronic circuit board and its preparation and usage, and belongs to the field of paint remover technology. The paint remover consists of NaOH in 40-150 g / L, surfactant in 0.5-50 g / L, additive in 0-50 g / L, corrosion retardant 0.1-2.5 g / L, and water for the rest. It is prepared through mixing and heating at 50-80 for dissolving completely. When the paint remover is used, the electronic circuit board is soaked in the paint remover and heated at 50-100 deg.c for 10-60 min to eliminate its paint layer. The present invention has the advantages of low cost, fast paint eliminating speed, low toxicity, use safety and capacity of being used repeatedly.

The invention provides a multi-satellite navigation system compatible GNSS (Global Navigation Satellite System) signal receiving method which supports the receiving of satellite signals of a GPS (Global Position System), a GLONASS (Global Navigation Satellite System), a Big Dipper navigation system and a Galileo satellite navigation system at present. The invention also discloses a multi-satellite navigation system compatible GNSS signal receiving correlator which comprises N multi-system correlated channels, wherein each multi-system correlated channel mainly comprises a carrier numerical controlled oscillator (NCO), a code NCO, a pseudo-random code generator and an integrating and zero clearing module; each code NCO is used for outputting a pulse sequence for triggering the pseudo-random code generator and also generating square signals with the same rate as subcarrier signals in a BOC (1, 1) signal demodulation mode; each pseudo-random code generator can generate 14 grades of pseudo-random codes at most; and each integrating and zero clearing module has an overflow protection function and improves the reliability. The multi-satellite navigation system compatible GNSS correlator can be compatible with four satellite systems, effectively improves the reliability and the continuity of navigation and positioning and obviously reduces the use risk of single-system navigation.

The invention provides a laboratory hazardous chemical reagent intelligent management system comprising an operation terminal, an identity recognition system and a two-dimensional code scanning gun. The operation terminal is connected with the identity recognition system and the two-dimensional code scanning gun. The operation terminal is internally provided with the laboratory hazardous chemicalreagent online management software. The laboratory hazardous chemical reagent online management software includes the following management modules: (1) a work personnel configuration module, (2) a reagent cabinet configuration module, (3) an inventory checking module, (4) a reagent warehousing module, (5) a reagent cabinet storage module, (6) a reagent taking module,(7) an authority configurationmodule and (8) a two-dimensional code tag generation module. The information of the manager and the user of the reagent is bound with the contacted reagent information in a "forced" way so that the phenomenon of disordered management of the laboratory hazardous chemical reagent can be solved.

The invention relates to the technology of the near space aerocraft. In order to provide a system-level consistency check novel model verification system output on the basis of the dynamic time sequence of the near space aerocraft model, give qualitative model verification based on the monte carlo method, carry out risk analysis to the model, comprehensively carry out consistency check to a model to be verified and give a visual verification criterion, the invention adopts the technical scheme that the verification and simulation realization method for a near space aerocraft model comprises the following steps of: (1) on the basis of the monte carlo simulation method, carrying out qualitative verification; (2) carrying out the qualitative model verification based on a time domain analysis method; and (3) carrying out qualitative model verification based on risk analysis, taking a model parameter as a risk to give a visual qualitative model verification criterion, giving a model comparison standard when a plurality of models to be verified exist, verifying whether the model can be safely used, and giving a safe-use range. The verification and simulation realization method for a near space aerocraft model, which is disclosed by the invention, is mainly applied to the design of the near space aerocraft.

The invention relates to a method for determining allowable defects of a helicopter composite main rotor blade and belongs to the technical field of structural fatigue design of helicopters. The method comprises the following steps: determining forms and easily occurring areas of a defect according to the function and structure of each area of a main rotor blade and process control and other conditions in the manufacturing process; predicting the maximum allowable size of the defect based on the principles such as detection simplicity, statistics and process controllability, and prefabricating on a full-sized test piece; determining the rationality of defect parameters by adopting a test of simulating fatigue and residual strength in a real load environment, determining the defect types in critical prevention and control of the composite main rotor blade, and establishing the defect allowable standard. According to the method, a technical basis can be provided for treatment of the various defects in the production, usage and maintenance processes.

The invention relates to an environment-friendly aqueous fluorocarbon metallic paint, consisting of the following raw materials in the following percents by weight: 35-65 percent of fluorocarbon emulsion, 5-12 percent of aluminum paste, 0.1-0.5 percent of antifoam agent, 0.1-0.3 percent of wetting agent, 0.1-0.3 percent of leveling agent; 0.2-0.8 percent of dispersing agent, 2-8 percent of metal orienting agent, and 0.1-0.3 percent of thickener: organic modified montmorillonite, 1.0-5.0 percent of polyurethane associative thickening agent, 1-3 percent of film forming agent, 1-3 percent of anti-freezing agent, 6-10 percent of solvent, and deionized water as the rest. The environment-friendly aqueous fluorocarbon metallic paint can reduce environmental pollution and application risks in thermal-insulation decoration systems and the performance can equal to that of solvent-based fluorocarbon aluminum paste (pearl powder) coating.

The invention discloses a power battery of a motor vehicle provided with an air conditioning system, which is technical characterized in that a heat exchanging fan is arranged on the inner surface of a top cover of a battery packaging box, a battery cell is arranged in the battery packaging box below the heat exchanging fan, a heat conducting plate is arranged at the bottom of the battery packaging box below the battery cell, a refrigerant pipe and a hot water pipe are arranged inside the heat conducting plate, a high-voltage wire connector and a low-voltage wire connector are arranged on a battery control device, an air blower is arranged at an air inlet of the vehicle body, a fan heater and an evaporator are arranged on a ventilation pipeline between the air blower and an air outlet of a passenger compartment, an electric air conditioning compressor and a condenser are connected in series and then connected in parallel with the refrigerant pipe inside the heat conducting plate on the evaporator, and a water circulation pump and a water storage tank provided with a heater are connected in series and then connected in parallel with the hot water pipe inside the heat conducting plate on the fan heater. The power battery of the motor vehicle adopts the water cooling method and air cooling method simultaneously. The air conditioner takes the heat of the battery away or heats the battery, and the fan is used for causing forced convection so as to guarantee heat balance of the battery and further guarantee the working performance and service life of the lithium battery.

The invention relates to a measuring method for latching effect of CMOS circuit, which can be applied to measure the igniting voltage / current of CMOS integrated circuit, maintaining the accurate value of the voltage and current, and the latching resisting ability parameter of secondary breakdown voltage and current. When in test, the input ends of the device being to be measured are grounded, the output ends suspends, then carries on following steps: at first, carries on direct current voltage scanning test to the terminal needed to be measured until the terminal is conducted to the ground, acquires the igniting voltage Von; then, carries on pulse current Ipulse test to the measured terminal until the latching appears, acquires the voltage and current; finally, carries on pulse voltage Vpulse test to measured terminal until appearing the secondary breakdown, and acquires the secondary breakdown voltage and current.

The invention provides a method for enhancing fair cloud computing user resource quota allocation. The method includes the steps of firstly, judging an application type, executing the second step if application is first application, and executing the fourth step if the application is a change application, secondly, acquiring the maximum quota of resource quotas corresponding to a user application system, thirdly, allocating the resource quotas for the first time, fourthly, judging the type of the change application, releasing the corresponding resource quotas if the resource quotas are the resource reduction quota, and executing the fifth step if the resource quotas are the resource increase quota, fifthly, calculating a credit factor shown in the specification, sixthly, allocating the resource quotas which are applied for increase if the credit factor is larger than a reference value C<0>, and multiplying the resource quotas which are applied for increase by a coefficient shown in the specification and then allocating the resource quotas to users if the credit factor is smaller than the reference value C<0>, and seventhly, the resource quotas of the users are dynamically adjusted with time T as the period. By means of the method for allocating the cloud computing user resource quotas, resource abuse is avoided, and allocation fairness is enhanced; the demand quantity of cloud computing platform resources can be effectively evaluated in advance, and the requirements of more users are met.

The invention belongs to the software function detection technique, and discloses an automatic detecting system for extension behavior of a Firefox browser, which utilizes an extraction extension line of the instrumentation Firefox browser. The system comprises a browser instrumentation module (101), an extension downloading module (102), a testing site module (103), an extension information extraction module (104), an event simulation module (105), an injection object tracking module (106), a control module (107), and an extension downloading storage vault (108). Compared with the prior art, in order to know the traditional browser expansion behavior, the invention further provides a proper security policy to reduce the extension use risk of the browser, so that the user can own great freedom degree during applying the extension on the premise of guaranteeing the security. Effective judgment reference is provided for judging whether safety threat exist in the inside extension of the browser, that is, the advantages that the Firefox owns great extension function and high humanization degree are fully exerted on the basis of security.

The invention provides an inner packing method for medical sterile gloves, and specifically relates to a method for perform inner packing for the medical sterile gloves by folding and being wrapped with inner lining paper. The method comprises the steps of 1, positioning flanged gloves on one surface of the inner lining paper; 2, folding the inner lining paper along the finger tips of the flanged gloves to enable the folded inner lining paper to cover the finger roots of the flanged gloves, wherein the inner lining paper is folded along the fingertips of the flanged gloves, then covers the finger roots of the flanged gloves and forwards extends to form a first transverse folding edge; 3, folding the inner lining paper which covers the upper surfaces of the finger parts of the gloves in step 2, the inner lining paper padded on the lower surface of the finger parts of the gloves, and the finger parts of the gloves along the fingertips of the flanged gloves to cover the palm parts and wrist parts of the flanged gloves; 4, sealing the inner package into a sterilizing bag. The packing method is simple in packing structure, convenient to operate, automatic to pack, low in cost, and small in risk of accidental pollution.

The invention discloses a furcated intravascular stent which comprises a main body stent section provided with tectorial membrane and a branch stent section connected with the main body stent section, and the connection position of the main body stent section and the branch stent section is provided with a leading-in section with a horn shape. The upper part of the leading-in section is narrow and the lower part is wide, and the design enlarges the diameter of the leading-in section, can obviously improve the leading-in performance of the branch stent and makes the leading-in process be simple and smooth. In addition, one end of the branch stent is designed as a crown shape, a short branch section of the main body stent section has a taper so as to be beneficial for enhancing the adherent performance of the proximal end of the branch stent, the pull-out force between the branch stent and the short branch section is improved, and the use risk of the stent is reduced.

The invention discloses a system for preventing unauthorized use of an IC card. The system comprises an IC card reader-writer, a microprocessor, a testing UID card, a power supply module, a display module, and an automatic alarming device. The device is capable of preventing the unauthorized use of the IC card mainly by determining whether the data writing-in state of the 0 block data of the 0 sector of the IC card, the number of the IC card, and information stored in the IC card are consistent with related information of a system database. The UID card is tested to determined whether the working of the system is normal. When the working of the system is normal, user IC card operation is carried out. When the IC card is not the original card, the system is capable of forbidding the writing and reading operation of the card, and is used to transmit IC card leakage prompting information to a cell phone of a user and a public security organ by short messages. The principle and the operation of the device for preventing the unauthorized use of the IC card are simple and clear, and therefore whether the IC card information is leaked can be determined accurately, and the safety and the confidentiality of the IC card are greatly improved.

The invention discloses a single-motor single-planet-row multi-gear hybrid power gearbox, a system and a vehicle. A single-planet-row and parallel fixed-shaft gear hybrid structure is adopted, so thatfour engine independent driving modes, one motor independent driving mode, one ECVT mode, five parallel driving modes, five traveling power generation modes and one parking power generation mode canbe achieved just with three shafts, a simple planet row, six parallel fixed shaft gears, four gear shifting elements and a simple clutch device. The gearbox also has following functions: a motor P3 / P1position switching function is achieved, the P3 high efficiency and a P1 parking power generation function are both considered, and meanwhile the risk of a motor hybrid gearbox is avoided through theECVT mode.

The invention discloses a repairing structure with a composite repairing piece and a method for forming the repairing structure and belongs to the technology of composite repairing. The repairing structure is composed of a repaired damaged composite structure, the composite repairing piece, glue between the composite repairing piece and the composite structure, and a sewing thread steeped with a cementing compound. Firstly, small holes penetrating through the repairing piece, the damaged composite structure and a glue layer between the repairing piece and the damaged composite structure are machined in a repairing piece repairing part; secondly, the sewing thread steeped with the cementing compound sequentially penetrates into the small holes; lastly, curing is carried out at the regulated temperature and pressure, so that the sewing thread are bonded to the repairing piece around the sewing thread and the damaged composite structure together, and thus the repairing structure with the repairing piece is formed. By means of the repairing structure formed through the method, the influence on the performance in a composite laminated plate face is small, the environmental sensitivity is reduced, and the weight of the structure is slightly increased; in addition, the bonding effect between the composite repairing piece and the repaired structure can be improved, so that the mechanical property and the reliability of the repairing structure with the composite repairing piece are improved, and the use risk of the repaired composite structure is lowered.

The invention provides a high security removable storage device which comprises a safe main control chip, a chip operating system (COS) arranged in the chip, a flash memory and removable storage device safety management software arranged in the flash memory, wherein the COS system is stored in the safe chip and is used for managing the authority certificates corresponding to users; the removable storage device safety management software adopts a memory sandbox technology, and is used for monitoring and filtering various operations which are carried out on a removable storage device by the users and programs, checking the device service environment and the access authority of the removable storage device by being matched with the COS system, controlling the unauthorized use behaviors of data files of the removable storage device decoded to the memory, and recording various key sensitive operations. The high security removable storage device adopts an integral protection technology combining software and hardware, so that the security access control of the removable storage device can be realized, and the users having different authorities have different data views and fine grit operation authorities for the removable storage device; therefore, the users are prevented from privately copying the files and the content in the removable storage device, and the data of the removable storage device is prevented from being broken and stolen by viruses and Trojan horses.

The application provides an axial flow ventricular auxiliary device with an external device. The device comprises a driving mechanism, a transmission shaft, an impeller and a catheter. The catheter sleeves the outer side of the transmission shaft, and the driving mechanism is arranged at a proximal end of the transmission shaft, and is connected to the impeller through the transmission shaft; the catheter comprises a guiding section and a blood pumping section for blood circulation, the guiding section is fluidly isolated from the blood pumping section, the blood pumping section is arranged at a distal end of the catheter, and the impeller is arranged in the blood pumping section; and a cavity in the blood pumping section forms a blood flow channel, and the two ends of the blood flow channel are respectively provided with a blood flow inlet and a blood flow outlet. The driving mechanism of the device is arranged outside a human body, so that the adverse effect of heat generated during the driving process of the driving mechanism on the human body is avoided. At the same time, since the driving mechanism does not need to be implanted into the human body, the size of the driving mechanism is not limited by the size of the catheter, and sufficient power can be provided for the blood pumping process.

The invention provides a transnasal high-flow-capacity oxygen therapy pressure monitoring system and method. A pressure detection device detects the airway pressure in a breathing pipe of transnasal high-flow-capacity oxygen therapy equipment, obtains detection signals and sends the detection signals to a control device. The control device receives the detection signals sent by the pressure detection device after receiving first acquisition commands to obtain first detection signals and receives the detection signals sent by the pressure detection device after receiving second acquisition commands to obtain second detection signals. The control device conducts analog-digital conversion on the first detection signals and the second detection signals to obtain first detection data and second detection data respectively, conducts calculation according to the first detection data and the second detection data to obtain the airway pressure value of a patient and outputs the pressure value. The airway pressure of the patient is obtained accordingly through detection of the airway pressure in the breathing pipe, pressure monitoring reference is provided for medical staff, and the clinical use risks are lowered.

This invention discloses a method and device for the protection and recover of a backward multiplexer circuit layer which is to generate and send error bit detection signals at the EI send side and at EI circuit receiving side, when computed circuit bit error rate exceeds the given threshold, it will generate circuit worsen performance information back to the sending to stop sending efficient data to send the bit error detection signals completely, when bit error rate got from the monitor of the receiving side satisfies the requirement of the backward multiplexer, it will inform the sending end to send efficient data to use the said EI channel again.

The invention aims to provide a dynamic token time error correction method for an authentication system, which effectively solves the problems of complex operation, low accuracy degree, and great potential safety hazard in the conventional token time correction technology. By adopting novel dynamic token time error tracking technology, the method can correct the time in the using process each time without opening the token, and the problem of error accumulation is avoided. Therefore, the dynamic token time error correction method eliminates the potential safety hazard of the token in structure and greatly reduces the using risk of a user on the basis of ensuring the token accuracy and availability. Due to the adoption of a two-factor authentication time shift tolerance mechanism, the dynamic token time error tracking technology is realized.

The invention discloses an independent ventilation cage flow measurement method which comprises the following steps of (1) dividing the voltage of an air inlet fan motor into N sampling points and dividing the voltage of an air outlet fan motor into M sampling points; (2) controlling the air inlet fan motor to work on a first sampling point, controlling the air outlet fan motor to work on a 0 sampling point and an M sampling point, collecting pressure difference between an air inlet box and an air outlet box through a pressure difference sensor, and utilizing a standard flow measurement instrument to demarcate flow in an independent ventilation cage of the air outlet fan motor on each of the sampling points; (3) repeating the step (1) and the step (2) when the air inlet fan motor works on other sampling points; (4) performing regression analysis on M+1 groups of pressure difference-flow data to obtain N pressure difference-flow curves meeting the following formula: deltaP+ K1 (v+ K2) 2= C, demarcating N groups of weight factors K1 and K2 when the air inlet fan motor works on different sampling points, and storing the N groups of weight factors K1 and K2 into a controller; (5) during actual operation, selecting the nearest voltage sampling point of an air inlet fan according to the voltage of the air inlet fan motor through the controller, and calculating the flow v by means of the weight factors of the nearest voltage sampling point and the measured pressure difference. The invention further discloses a cage box external pressure difference measurement method and a control method based on the independent ventilation cage flow measurement method and the cage box external pressure difference measurement method.

The invention belongs to the field of remediation of underground water and discloses a method of using biochar for oxidizing trivalent arsenic in underground water. The method includes the steps of adding the biochar into the underground water containing the trivalent arsenic (AsIII), introducing oxygen-containing gas at the same time, and carrying out stirring for a reaction for 1-3 days so thatthe AsIII in the underground water can be oxidized into pentavalent arsenic (AsV), wherein the biochar is obtained by adopting agricultural and forestry waste as a raw material for pyrolysis for 30-150 minutes at 400-500 DEG C under an oxygen isolation condition and then washing an obtained solid with deionized water. Through the cooperative effect of the biochar and the oxygen-containing gas andthe improvement of a pyrolysis preparation process and the like of the key biochar, the problems can be effectively solved that secondary pollution is likely to be caused, the operation cost is high,the operation is complicated, external minerals need to be added, and the efficiency is low. According to the method of using the biochar for oxidizing the AsIII in the underground water in site, an economical, efficient and environment-friendly treatment method is provided for oxidizing the AsIII in the underground water.

The invention relates to a skin beauty and skin drug delivery device and a purpose of the skin beauty and skin drug delivery device. A protection cover is additionally arranged on the device and a movable connecting mode of multidirectional sliding or multi-angle movable embedding is adopted by a handle and a support of a fixed support so that transdermal drug delivery, transdermal absorption and system slow release are improved. A rolling needle is capable of producing a large amount of micro-tubes at a short time so that drugs, beauty products and the like can directly penetrate through epidermal layer cells and corium layer cells of the skin. A wound in the epidermal layer is small and healing of the wound is rapid so that possibility of bacterial infection is obviously reduced, the skin is not hardened or skin cells are not contracted, epidermal tissue does not become thinner and the device is capable of being reused. The device can further be used for massaging the skin on the head so that hair can be stimulated to grow. The device is simple in manufacturing technology, low in cost and side effect, obvious in effect, good in controllability, convenient to use, capable of being controlled by simple training, strong in practicality, capable of being directly used in daily life, particularly suitable for mass production and business application for industries and businesses of medicine, beauty and the like and remarkable in benefit.

The invention discloses a lamp belt connecting assembly and a high-voltage flexible LED lamp belt applying the same. The lamp belt connecting assembly comprises male plugs, female plugs, connectors and a tail plug. According to the high-voltage flexible LED lamp SMD lamp belt, the length of the needed lamp belt can be acquired by the fact that lamp belt units are spliced freely according to actual needs by a customer, the male plugs or the female plugs are arranged at the head ends and the tail ends of the lamp belt units in the using process, and mutual butt joint of two lamp belt units is achieved through the male plugs and the female plugs, so that a plurality of lamp belt units can be connected front and back conveniently, and meanwhile the fact that one unit of the high-voltage flexible LED SMD lamp belt is scrapped due to wrong position shearing can be avoided. In addition, according to the lamp belt connecting assembly, assembling and disassembling are simple and convenient, an assembling structure is compact, waterproof and dustproof performance can be effectively achieved, and the using risk of the high-voltage lamp belt is lowered.

The invention discloses a percutaneous auxiliary pumping blood device. The device comprises a driving module, a control module and a pumping blood conduit capable of being percutaneously implanted into a human body, wherein the driving module is located outside the body and is arranged to be separated from the pumping blood conduit, a far end of the driving module is connected to the pumping blood conduit through a flexible transmission structure, and a near end of the driving module is connected to the control module through a signal line. According to the percutaneous auxiliary pumping blood device, the pumping blood conduit and the driving module are arranged to be separated from each other and are connected through the flexible transmission structure, an active driving module is located outside the body, the flexible transmission structure drives the pumping blood conduit to be implanted inside the body to achieve the auxiliary pumping blood function, additional risks brought by when the active parts enter the body are avoided, and the using risk of a system and the operation implantation difficulty are effectively lowered.

The invention relates to an automobile brake disc anti-corrosion treatment method and concretely relates to an anticorrosion treatment method for coating an automobile brake disc with nanometer graphene. The automobile brake disc anti-corrosion treatment method solves the problem that the prior art easily produces brake disc corrosion and large wear. The anticorrosion treatment method for coating an automobile brake disc with nanometer graphene comprises the following steps of 1, brake disc pretreatment: carrying out degreasing, erosion, ultrasonic cleaning and phosphorization on a brake disc and 2, graphene paint spray-coating. The treated brake disc has a nanometer graphene coating with substantial rust and corrosion resistance on the outer surface, greatly improves brake disc rust and corrosion resistance, prolongs a brake disc service life and effectively reduces brake disc usage risk.

The invention discloses a dynamic payment method and system. The method comprises the steps that S100, a client generates a dynamic code according to current time, a bank card serial number of a user and device identifier information of a client; S200, the client encrypts unique identifier information corresponding to a bank card plug-in in the client according to the generated dynamic code; S300, the client generates a dynamic bank card number according to the bank card serial number information in the client, the dynamic code and the encrypted unique identifier information in the step S200; and S400, a server performs verification according to the dynamic bank card number, and finishes payment when the verification succeeds, otherwise, returns to and executes the step S100. The purpose of the method is to generate the dynamic bank card number, and an offline authentication mode is adopted, so that the payment efficiency is improved and the use convenience is brought for users.

The invention discloses an intelligent integral multifunctional electric energy meter, which comprises an electric energy meter body; an input interface and a load monitoring end are arranged on the electric energy meter body; the input interface and the load monitoring end are respectively limited on two different surfaces of the electric energy meter body; a grid null line and a live wire are accessed into the input interface; a plurality of user loads are accessed into the load monitoring end; and a plurality of transmission connection configurations, a metering module, a circuit breaking module, a transmission port, a display and a control panel are arranged on the electric energy meter body between the input interface and the load monitoring end. According to the electric energy meter provided by the invention, the functions of metering and charging can be realized, and the control of user load can also be realized synchronously; as a plurality of output ports are arranged, the data transmission way is flexible, the user or maintenance staff can conveniently obtain the data information and solve the problems in time. In addition, the invention further discloses a method for controlling a load by the intelligent integral multifunctional electric energy meter.

The invention relates to Helicobacter pylori antigen HLA restrictive immunodominance epitope peptide as well as a preparation method and application thereof. The dominance epitope peptide has the amino acid sequences shown in SEQ ID NO:63, 74, 95 and 105. The invention also provides a preparation method of the epitope peptide, and further provides application of the epitope peptide to preparation for preventing or treating Helicobacter pylori infection.

The invention provides a safe USB flash disk and a data active protection method thereof. The safe USB flash disk comprises a safe main control chip, a chip operating system (COS) in a chip, a Flash memory and USB flash disk safe management software built in the Flash memory, wherein the COS system is used for storing and managing an authority certificate corresponding to a user; and the USB flash disk safe management software is used for monitoring and filtering various operations carried out on the USB flash disk by the user and a program, checking use environment and access authority of the USB flash disk equipment in cooperation with the COS system, controlling a unauthorized use behaviour of a USB flash disk data document which is deciphered to the memory and recording various key sensitive operations by adopting a memory sandbox technology. Since the USB flash disk adopts a hardware-software integrated protection technology, the safe access control of the USB flash disk is realized and users having different authorities have different USB flash disk data views and fine-grit operation authorities so that users can be prevented from privately copying documents and contents in the USB flash disk and the USB flash disk data is prevented from be destroyed and stole due to viruses and Trojans.