165results about How to "No intervention" patented technology

The invention provides a method and a system for detecting a vulnerability. The method comprises the following steps of: hooking a function called by a machine code for code execution, acquiring the return address of the function, detecting whether the entry instruction of the function is a normal call instruction or not according to the return address, and if not, determining that a vulnerability is detected. According to the invention, the vulnerability causing a security problem, such as a Web Trojan, can be identified comprehensively and effectively, and the Internet security is improved for a user.

The invention discloses an automatic WIFI accessing method and system of a device. The method comprises: a device waiting for accessing to the Internet establishes connection with a device already accessing to the Internet and sends authentication information to an authentication platform via the device already accessing to the Internet, wherein the device already accessing to the Internet is already authenticated via the authentication platform and already logs in a home gateway; the authentication platform authenticates the authentication information of the device already accessing to the Internet; when the authentication platform succeeds in authenticating the authentication information of the device already accessing to the Internet, the device already accessing to the Internet sends a service set identification (SSID) and a key of the home gateway to the device waiting for accessing to the Internet; and the device waiting for accessing to the Internet logs in the home gateway according to the received SSID and key of the home gateway and then accesses to the Internet. The automatic WIFI accessing method and system of the device are capable of reducing the risk that an intelligent device is attacked in the process of automatically accessing to the Internet, and reducing user intervention.

The invention discloses an integrated air conditioner and a condensed water processing method for the integrated air conditioner. The integrated air conditioner comprises an indoor water receiving plate, a drainage device connected with the indoor water receiving plate and used for leading the condensed water in the indoor water receiving plate to the outer side walls of multiple rows of condensers of the integrated air conditioner, the multiple rows of condensers used for heating condensed water on the outer side walls to at least vaporize part of the condensed water, a water tank arranged on a chassis of the integrated air conditioner and used for receiving non-vaporized condensed water on the outer side wall, and a water beating motor which comprises a plurality of water beating wheels and is used for beating the non-vaporized condensed water to the outer side walls of the condensers through the water beating wheels so as to enable the multiple rows of condensers to vaporize the non-vaporized condensed water again. By means of the technical scheme, the condensed water in the integrated air conditioner can be discharged automatically, and a user is protected from manually discharging the condensed water.

The invention provides a method for degrading environmental estrogen pollutants in a water body. The method comprises the steps of adding nascent state hydration manganese dioxide colloid into water containing estrogen pollutants with a concentration of between 0.1 and 10 mu mol / l, controlling a concentration of the manganese dioxide in the system of between 0.25 and 25 mu mol / l, a PH value of between 4.0 and 7.0 and a temperature of between 5 and 35 DEG C and stirring or oscillating the system solution with a rotating speed of between 100 and 150 rmp to degrade the environmental estrogen pollutants in the water body. The method is low in treatment cost, free of the restriction of field conditions, high in degradation efficiency, uneasy to generate secondary pollution, applicable to the degradation and removal of environmental estrogen pollutants in various natural water bodies and man-made water bodies, possessing a good industrialization promotion prospect.

The invention discloses a service braking system based on intelligent hill-start assist. The service braking system is easy to operate and good in safety and comprises a first gas storage tank (1), a foot barking valve (4) and a service braking gas chamber (8) which are communicated through gas circuits; the service braking system further comprises a second gas storage tank (3), a differential-type relay valve (5), a magnetic valve (9), a first three-way valve (61), a hill-start assist controller (2) and a gas pressure sensor (11); a first control gas port (541) of the differential-type relay valve (5) is connected with a gas outlet of the foot barking valve (4) through a gas circuit, a gas inlet (51) of the differential-type relay valve (5) is connected with the second gas storage tank (3) through a gas circuit, a gas outlet (52) of the differential-type relay valve (5) is connected with the service braking gas chamber (8) through a gas circuit, a second control gas port (542) of the differential-type relay valve (5) is connected with the second gas storage tank (3) through a gas circuit by means of the magnetic valve (9), and the gas pressure sensor (11) is arranged on the gas circuit between the gas outlet of the differential-type relay valve (5) and the service braking gas chamber (8).

The invention discloses a cell phone based on the mediate and a system operated with the PC, comprising: the cell phone installed with the mutual operation proxy, the PC installed with the mutual operation system; the mutual operation system comprises: a user operating interface module, a mutual operation mediate, a netting communication module and a driving program module, a server which comprises a driving program bas, a content database, a content adapting module and a netting communication module; the cell phone and the PC are connected by the physical way; the PC and the sever are connected by the physical way. In addition, the invention also discloses a method based on the mediate and a system operated with the PC, firstly connecting the cell phone and the PC; then processing the following four operations: obtaining the proper content to the cell phone via the server, automatically shifting the PC / internet to the cell phone; sharing and adapting between the cell phones; processing the data backup, address list synchronization, schedule synchronization and other operations.

The invention discloses a wireless communication network connection method, which comprises the following steps of: arranging all wireless network card interfaces that can be connected, and wireless network connection parameters in a wireless network connection device; connecting the wireless network connection device to equipment and powering on, inputting a network name and a password, and searching for the wireless network card interfaces to which the equipment can be connected; listing all found wireless network card interfaces to which the equipment can be connected; selecting a wirelessnetwork card interface from the wireless network card interface list, and detecting the connect ability of the wireless network card interface; if the wireless communication network can be connected,judging whether the wireless communication network is connected; if so, exiting and returning; otherwise, performing wireless communication network connection if no wireless communication network connection exists. Through the method, the wireless network connection of the equipment is more convenient and quick, and the using perception of users is enhanced.

The invention relates to an X-ray imaging stretching fault automatic detection method for a steel cable core conveying belt joint, which belongs to the field of X-ray nondestructive detection. Defects of lower reliability, poorer accuracy, non-visual display, dependence mainly on manual detection and the like exist in the current stretching fault detection of a current steel cable core conveying belt joint. The invention consists of the following three aspects: 1. on the basis of the gray level change characteristic of X-ray images of a steel cable core conveying belt, screening out images containing partial or all joint information from the X-ray images of the whole steel cable core conveying belt by adopting local histogram information; 2. splicing the screened images into the corresponding image containing the complete joint information; and 3. realizing the judgment for the stretching of each joint by adopting an improved condition Y-difference algorithm and a clustering method. The invention can automatically, rapidly and efficiently realize the stretching fault detection of the steel cable core conveying belt joint.

The invention discloses a client operating system nucleus code dynamic replacement method of a virtual machine manager, belonging to the software technical field. The method is as follows: (1) a host operating system is internally added with a CID process, assigned with an implantation space so as to contain implanted alternate codes, and then VMM maps the implantation space to a kernel process space of Guest OS; (2) the VMM counts codesnippet needed to be replaced; (3) the CID appoints a section of replacing codes according to the statistical results; (4) the appointed replacing codes are read into the implantation space, and a call stack in which the replacing codes locate is obtained; (5) the CID finds out calling points of the replacing codes in the Guest OS; the VMM changes skip addresses of the call points into the offset address of the appointed replacing address. The invention makes the advantages of the half virtualization method being blended into the full virtualization technology possible and does dynamic replacement for Guest OS kernel in a binary system bedding surface.

The invention provides a self-unloading-type blanking device. By the self-unloading-type blanking device, steel balls are enabled to automatically fall towards a feeding device, and manual conveying and interfering are not needed; the self-unloading-type blanking device is timesaving, laborsaving and high in efficiency, and accurate conveying of the steel balls is guaranteed. The self-unloading-type blanking device comprises a feeding hopper, and a dedusting device is arranged below the feeding hopper. The self-unloading-type blanking device is characterized in that a conveying chain is arranged above the feeding hopper, a material mover is mounted on the conveying chain and comprises a material moving hopper, a guide plate and a turning bearing, the guide plate is arranged on the outer side of the material moving hopper, the turning bearing penetrates two sides of a front position on the upper portion of the material moving hopper, the turning bearing, the guide plate and the material moving hopper form the material mover in a fixed position relationship, the turning bearing is supported in a positioning groove of the conveying chain, and the material moving hopper is of an opening-closed structure in a big-end-up manner.

The invention, which relates to the technical field of the automobile leasing equipment, provides an unattended vehicle taking and returning system and method thereof. The system comprises a vehicle, a vehicle-mounted device, a mobile phone APP, and a server. The vehicle-mounted device is connected with the vehicle by a CAN bus and can read vehicle OBD interface information; and information including vehicle electricity information and code table mileage is sent to the server. Under the circumstance that the vehicle-mounted device is in a networking state, the collected data are transmitted to the server by a wireless communication network and a control instruction of the server is received, so that with a vehicle renting APP, the user can control the vehicle-mounted device by a remote server. Besides, the method includes a vehicle taking flow and a vehicle returning flow. The number of the management staff of the station can be reduced and the management cost can be lowered; a complete self-service effect without any management staff intervention is realized, so that the operation cost is lowered; the vehicle position information is monitored in real time, thereby preventing a vehicle losing phenomenon; and self-service type vehicle taking or returning can be completed with or without a network.

The embodiment of the invention discloses a method and a device for playing audio data, a storage medium and an intelligent terminal. The method comprises the following steps that: when the connectionstate of the intelligent terminal and external audio equipment is a connection exception state, obtaining the playing state of an audio playing application which is operated at present; when the playing state is a pause state, recording the duration of the pause state; and if a detection result shows that connection between the intelligent terminal and the external audio equipment recovers to benormal and the duration of the pause stat does not exceeds a preset time threshold value, controlling the audio playing application to play audio data. By use of the above technical scheme, a time threshold value for automatically recovering playing is set for controlling the audio playing application, when factors which causes the connection between the intelligent terminal and the external audioequipment disappear, whether duration time for playing pause exceeds the time threshold value or not is detected, if the duration time for playing pause exceeds the time threshold value, the audio playing application is automatically controlled to recover playing, users do not need to intervene, and control intelligence is improved.

The invention discloses a transformer substation acceptance inspection working process control system and control method with the function of intelligent warning and prompting. The system is composed of an intelligent warning device, a rule determination module, a process transferring module, a main controller, a timing device, a storage device, a data processing module, and an automatic checking module. The acceptance inspection work of the transformer substation includes: substation acceptance inspection application, inputting of point table information and a protection configuration table, information table preprocessing and examination and approving of acceptance inspection application, master station pattern drawing and system configuration of the master station and substation, inputting of a monitoring information table, substation acceptance inspection, master station acceptance inspection, examination and acceptance reporting, casual inspection of acceptance inspection results, and formation of final acceptance reports and evaluation reports. According to the invention, information missing during the acceptance inspection process can be avoided; coordination of work of all departments can be realized and errors caused by handing over of departments can be avoided; the work efficiency can be improved; high accuracy and high efficiency of the acceptance inspection work of the transformer substation can be guaranteed; the accuracy of the power equipment acceptance can be improved based on the standard acceptance inspection mode; and secure and stable operation of the power grid can be guaranteed.

The invention relates to an RFID application testing system and relates to the electronic technical application field. The RFID application testing system is a testing system which provides RFID technical application testing services for the majority of small and middle RFID and IOT enterprise and system integrators. The RFID application testing system includes a label performance testing system, an RFID label location deployment testing system, an RFID-based intelligent tray conveying and sorting testing system, an RFID-based intelligent packing container item conveying and sorting testing system, a single-item annular conveying testing system, an intelligent goods shelf testing system and a warehouse gate door data acquisition testing system. The RFID application testing system can provide RFID technical application testing services for the majority of small and middle RFID and IOT enterprise and system integrators and can carry out nearly 30 kinds of tests under a variety of scenes.

The invention relates to a method for denoising three-dimensional laser scanning point cloud data of a shield tunnel. According to the method, the technical problems of complicated steps, low denoising precision and the like of an existing method for denoising scanning point data are mainly solved. The method provided by the invention is characterized by comprising the following steps: acquiring three-dimensional laser scanning data of the shield tunnel; S1, reading scanning point cloud data, marking an each cycle of scanning point data set as E0; S2, establishing a Cartesian rectangular coordinate system and partitioning scanning point quadrants; S3, extracting the scanning point cloud data; S4, carrying out preliminary elimination on noisy points according to structural features of the shield tunnel and scanning features of a three-dimensional laser scanner based on X values or Y values of different quadrants and the distance change trend; S5, carrying out circle fitting secondary elimination on the scanning point data subjected to preliminary elimination of the noise points; S6, carrying out final denoising of the three-dimensional laser scanning point cloud data by an ellipse fitting method performed on the basis of a geometrical distance least square method; S7, repeating the steps of S2, S3, S4, S5 and S6, and treating all point cloud data of all scanning cycles; S8, outputting effective point cloud data of the scanning points.

The invention discloses a quick measuring method based on a laser ranging device. The quick measuring method comprises the following steps of: 1, selecting a standing point, that is to say, selecting an observation point, which is beneficial for observation of a GPS (Global Positioning System), as a standing point P1 of a measuring worker; 2, measuring geographical coordinates of the standing point, that is to say, measuring geographical coordinates P1 (B1, L1) of the standing point P1 by utilizing a GPS measuring device; 3, measuring by the laser ranging device, that is to say, measuring horizontal distances s among a true azimuth angle A12 of a straight line of the standing point P1 and a point to be measured P2, the standing point P1 and the point to be measured P2 by utilizing the laser ranging device, wherein the laser ranging device is a laser ranging device provided with an electronic compass; and 4, converting the geographical coordinates of the point to be measured P2. The quick measuring method, provided by the invention, has the advantages of simple operation, convenience for implementation, quick measuring speed, high measuring precision, and capability of really realizing quick and accurate measurement of a detail point, and effectively solving the problems of slow measuring sped and difficulty in measurement of the conventional handheld GPS measuring method.

The invention relates to a house distribution graph generating method applied to a power system, in particular to an electric transmission line house distribution graph generating method based on a GIS mode. The method includes the specific steps of recording and managing properties of a house, automatically numbering the house, renaming batches of house photos, manually grouping of the house, outputting batches of distribution graphs and automatic loading and typesetting of correlated photos. The mode of outputting a house distribution graph in a flat profile graph in the prior art is changed and a GIS data processing method is adopted for directly editing and managing house graphs and property data in a plane graph. The house distribution graphs are output in batches according to a line path and the photos are automatically loaded. The electric transmission line house distribution graph generating method based on the GIS mode has the advantages that the automatic house numbering method is provided, efficiency is improved and subjective errors are avoided. Names of house correlated photos are stored in the house property, the photos are renamed in batches according to the serial number of the house, the house distribution graph is directly output from the house plane graph, middle files are not needed, and therefore house graph processing is more flexible.

The invention provides a fresh keeping control method and device of refrigerating equipment. The fresh keeping control method of the refrigerating equipment comprises the following steps of: detecting the humidity in fresh keeping space by a humidity sensor arranged in a fresh keeping space; determining the type of food materials placed in the fresh keeping space according to the detected humidity; determining corresponding fresh keeping operation conditions according to the type of the food materials, wherein the fresh keeping operation conditions at least include a storage temperature range and an oxygen concentration range, corresponding to the type of the food materials; and controlling a refrigerating system and an air conditioning system to run so as to keep the temperature of the fresh keeping space within the storage temperature range and keep the oxygen concentration of the fresh keeping space within the oxygen concentration range. According to the scheme provided by the invention, the category of the food materials is determined through humidity, so that different fresh keeping operation conditions are determined according to the type of the food materials; through adjustment of the storage temperature and the oxygen concentration, the fresh keeping space meets fresh keeping demands of the food materials, and the fresh keeping effect of the food materials is improved.

The invention discloses a detection method and a detection system for sample frames on an assembly line. According to the detection method, detection is implemented before the working of a transport line to provide a reference basis for determining whether the working of the transport line is controlled, and sample frame sending-away failure information is outputted to remind a user of disposing when sample frames exist on the transport line after a sample frame transport operation is finished on the transport line, so as to avoid the blockage of the transport line caused by the subsequent transmission working process, so that a human-computer interaction process is simplified when the assembly line is started up, and the automation degree and the self-adaptation degree of products on the assembly line can be improved. The invention further provides a debugging method for sample frames on the assembly line. If transport blockage is caused by placing the sample frames to influence normal transport or test, the transport line is controlled to stop working, a sample frame taking-away prompt information is outputted to remind the user of taking away the sample frames just arranged or other sample frames; when the transport blockage is not caused by placing the sample frames or the sample frames are taken away, the transport line normally works without the need of the intervention of the user, so that the self-adaptability of the products on the assembly line can be improved.

The invention discloses a novel water purifying plant and a water purifying method. The novel water purifying plant comprises a water storage body, a water processing assembly arranged in the water storage body, a purified water storage assembly and a limiting mechanism, wherein the limiting mechanism is arranged on the water storage body or is arranged inside the water storage body; the water processing assembly consists of a primary filter assembly the lower part of which is provided with a water inlet and a functional filter material assembly communicated with the inside of the primary filter assembly; and the functional filter material assembly is provided with a secondary purified water inlet connected with a primary filtered water outlet of the primary filter assembly and a secondary purified water outlet connected with the purified water storage assembly. The water purifying method comprises the following steps: subsiding a pressure generated in the process of discharging water in the water by the water processing assembly; and making the water flow through the primary filter assembly and the functional filter material assembly from top to bottom to be purified and finally flow into the purified water storage assembly. The novel water purifying plant has the advantages of simple structure, convenient use, electricity consumption prevention, no pollution, large flux, low cost and wide application range, can effectively purify various different water qualities and can realize the using requirement according to the different water qualities.

The invention provides a deep sea self-induction emergency load rejection mechanism. The mechanism comprises a ballast, wherein a lifting lug is fixedly arranged at the upper part of the ballast; an installation rack is fixedly installed on a subsea equipment body and comprises lug plates; through holes for passing and sliding of a plunger are formed in the lifting lug and the lug plates; a cylinder block is fixedly installed on the installation rack and is provided with a hollow cavity with an opening in one end; one end of the plunger is stuffed in the hollow cavity; the plunger and the hollow cavity are sealed by sealing elements; the sealed hollow cavity is pre-filled with internal pressure; the cylinder block and the plunger are connected by a locating pin; the other end of the plunger passes through the through hole of the lifting lug and the through holes of the lug plates; under the actions of the internal and external pressures of the sealed hollow cavity, the plunger is connected with the through hole of the lifting lug or breaks away from the through hole of the lifting lug so that the ballast is connected with the installation rack or breaks away from the installation rack. The mechanism achieves automatic load rejection through self induction of internal and external pressures.

The embodiment of the invention discloses a method and system for achieving the automatic adaption of the virtual desktop screen resolution on an Android terminal. The method includes the steps that the Android terminal reads screen resolution parameters of the Android terminal; the Android terminal sends the screen resolution parameters and virtual machine identity (ID) information to a parameter transfer unit on a physical host machine where the virtual machine is located, wherein the Android terminal needs to have access to the virtual machine ID information; the parameter transfer unit writes the screen resolution parameters and the virtual machine ID information in a para-virtualized peripheral component interface (PCI) bus of the virtualization progress on the physical host machine; a virtual machine corresponding to a virtual machine ID reads the screen resolution parameters from the para-virtualized PCI bus, and adjusts the resolution of a Windows operating system according to the screen resolution parameters so that the resolution of the Windows operating system and the screen resolution of the Android terminal can be consistent. By means of the method and the system, the problem that screen overflow or insufficient filling is generated when the resolution of the Android terminal and the resolution of the Windows operation system in a virtual desktop are not consistent can be solved.

The invention relates to a map optimization method and system for a mobile robot SLAM. The method comprises the steps: acquiring the environment information collected by a mobile robot, wherein the environment information is obtained by scanning in an environment of a to-be-constructed map by the mobile robot; obtaining a plurality of indexes representing the quality of the environment grid map, wherein the plurality of indexes comprise a grid occupancy rate, an angular point number and a closed area number; taking the plurality of indexes as targets, and performing multi-target iterative optimization according to the environment information and the ranges of the plurality of parameters to be optimized in the SLAM algorithm to obtain an optimal parameter combination in the SLAM algorithm,wherein the SLAM algorithm is used for generating an environment grid map according to the environment information; generating an optimal environment grid map by adopting an SLAM algorithm of the optimal parameter combination according to the environment information, wherein the optimal environment grid map is used for navigation and positioning of the mobile robot. According to the invention, themap construction efficiency and the map quality of the SLAM can be improved.

The invention relates to a closed surface automatic search method of a space multiply connected domain. The closed surface automatic search method of the space multiply connected domain comprises the following steps: obtaining a line segment set and control precision, and judging if the line segment is in the same space and plane, if yes, extracting a reference plane; requesting intersections to all the line segments and interrupting at the position of intersection points; mapping all endpoints into the reference plane; establishing a mapping relation between each line segment and endpoint location index values; searching out a minimum closed region of each endpoint one by one by means of single point around method, enabling the outer side line of the closed region to form a Wire, and enabling the Wires in the same simply-connected domain to form a Wire Group, till all the Wire Groups are established; calculating a Wireframe bounding box of each Wire Group, establishing topology relations among the Wire Groups, and establishing a closed surface by means of the Wire Group. Compared with the prior art, the closed surface automatic search method of the space multiply connected domain has the advantages of being achievable, fast, effective, fully-automated and the like.

The invention provides a dendrobe seedling environment contrast experiment system based on Internet of things. The dendrobe seedling environment contrast experiment system comprises an application layer, a communication layer and a sensing layer, wherein the application layer is a monitoring center server; the communication layer comprises a Wifi wireless router and a zigbee wireless gateway; the sensing layer is mounted and distributed in a contrast test chamber; the sensing layer comprises a temperature sensor, a humidity sensor, an illumination sensor, an ultraviolet sensor and a video probe; and the monitoring center server is connected to the zigbee wireless gateway through the Wifi wireless router. A valuable and rare seedling growth environment monitoring system is constructed by using an Internet of things technology, the influence of environmental parameters on seedlings is tested through the adjustment of different environmental parameters in the seedling process, optimal dendrobe seedling growth parameters are obtained on the basis of certain screening tests, the growth situation of dendrobe under a natural state is simulated in the whole system, and long-time manual control and interference is not needed.

The invention discloses a functional completeness testing platform and testing platform for circuit boards. The testing platform includes a core processing panel, a computer, an external power source, a signal generator and an oscilloscope. The testing platform has a feature of universality. The computer can set different testing schemes for the different to-be-tested circuit boards. According to the invention, expansion and transformation can be made on a physical interface of the testing platform directing at the to-be-tested circuit boards having different input and output interfaces; actual signals can be simulated and set digital signals can also be input for the to-be-tested circuit boards, so that response to the actual input signals of the to-be-tested circuit boards can be judged and response to digital signals with strict requirements of the to-be-tested circuit boards can also be judged. The computer program of the invention has interfaces for other programs and data statistics and subsequence treatment can be made according to testing results. Only one person is needed in the whole testing process from cable connection to electrification testing, so that the production efficiency is improved substantially.

The invention provides a method, which comprises the following steps of: 10, configuring image information through a central processing unit (CPU); 20, judging the width and the row start address of a processed image in the configured information, and outputting a judgment result; 30, generating a write command according to the result, piecing the data output by an image processing unit into datastream matched with the write command, and sending the write command and the data stream to a memory; 40, performing continuous transmission till the transmission of the row is finished; and 50, starting a new row till the transmission of the whole image is finished. In a circuit structure, the cpu is connected with a configuration unit; the configuration unit is connected with an image width alignment judgment unit and an image row start address alignment judgment unit respectively; the image width alignment judgment unit and the image row start address alignment judgment unit are connected with a write command generating unit and a date recombination unit respectively and connected with the memory; and the date recombination unit is connected with the image processing unit. The invention can support image write back of random starting point and random width in a high bit width system.

The invention discloses a GPU (Graphic Processing Unit) virtualization optimization method based on delayed submitting. The method comprises the following steps that 1, a front end of a GPU virtualization frame on a client reads a binary file of a to-be-executed CUDA (Compute Unified Device Architecture) application program, and searches and marks a circulation which can be delayed to submit; 2, when the circulation part which can be delayed to submit is executed and before the circulation is finished, the front end caches all CUDA function call information and dependency relationship, jumps over the execution of a function call, and sends the cached information to a rear end of the GPU virtualization frame on a host once after the circulation is finished; 3, the rear end reconstructs and executes the function call according to the cached information, and then packs all task execution results and sends the packed task execution results to the front end once, wherein the circulation part which can be delayed to submit does not execute the CUDA function call in circulation, and the circulation still can be executed correctly. The method can be used for reducing the communication frequency of the front and rear ends, thus optimizing the virtualization performance of the GPU.

The invention discloses a preparation method and product of minimal acid water soluble ginkgo leaf extract. According to the method, the ginkgo leaf is extracted by using water as a solvent, the content of ginkgolic acid is reduced by flocculating settling combined with refrigeration, and gingko flavone and terpene lactone are purified and concentrated by resin column chromatography. The content of ginkgolic acid of the product is less than 0.1ppm, the solubility of the product in cold water is 5g / 100ml, and two main problems of high content of ginkgolic acid and poor water solubility of ginkgo leaf extract are solved simultaneously. Compared with the prior art, the extraction and preparation process disclosed by the invention has the advantages of little production investment, simplicityof equipment, flow and operation, low production cost, safety of used reagents, no intervention of toxic organic solvent, stable product quality, strong operability in industrialized production and the like.

The invention relates to an embedded-Linux-system-based automatic monitoring device and an embedded-Linux-system-based automatic monitoring method for a wireless local area network (WLAN). The device comprises a power management unit, a microprocessor unit, a storage unit, a standby battery unit, a real-time clock unit, a general packet radio service (GPRS) wireless module, a WLAN module, a universal serial bus (USB) interface unit and a serial port unit. The software system structure of the device comprises a bootstrap loader module layer, an embedded Linux system kernel module layer, a driver module layer and an application program module layer. The device and the method have the advantages that: the device automatically finishes various test items, and also finishes alarming indication for overrange wireless network quality parameters of the WLAN; the internal GPRS wireless module of the device reports alarming needs and data to an encryption server platform by a transmission control protocol (TCP) / Internet protocol (IP) and a short message, a server is connected with the Internet, and a client can configure the basic information of the device by a web browser and view test results and alarming items of a certain test site only after being connected with the Internet; and the low-cost automatic monitoring device for the WLAN is provided for the stationing testing of a telecommunication operator.