733results about How to "Expand the scope of use" patented technology

The invention discloses a method for managing a plug-in and a system thereof. The method comprises the following steps: A, abstracting the operation interface of the plug-in and encapsulating the interface into an upper-level invocation interface; B, storing obtained plug-in handle and marking in a memory when loading the plug-in needs to be invoked, and establishing the corresponding relationship between the plug-in handle and the plug-in management information; and C, conducting loading, unloading or searching operation to the plug-in to be invoked according to the upper-level invocation interface and the corresponding relationship between the plug-in handle and the plug-in management information in the memory. The invention realizes unified storage, operation and management to the plug-in, and particularly aims to solve the difference between static loading and dynamic loading of a shared library, thereby enlarging use range of programs to plug-ins, improving the cross-platform expansibility of programs, and facilitating the transplantation of programs.

The invention discloses an application testing method, a center control server, a test terminal and a system and relates to the field of automated testing. The application testing method, the center control server, the test terminal and the system aim to solve the problems that an existing testing process is complex, cumbersome and poor in usability. The method comprises the steps that a testing instruction issued by a use case management platform is received, wherein the testing instruction carries an APK identifier and a testing use case written in a scripting language; an APK used as a test object is obtained according to the APK identifier, an auxiliary test pack of the APK is generated, and a scripting engine and basic information required by testing are packaged in the auxiliary test pack; the APK, the testing use case, the auxiliary test pack and a function library are issued to the test terminal. The application testing method, the center control server, the test terminal and the system are mainly applied to the application testing process in a public cloud environment.

The invention discloses a typical abnormal sound detection method and a device, relates to the voice signal processing field and particularly provides an abnormal sound detection method based on spectrograms. According to the method, a sound signal is acquired, the sound signal is pre-processed, and effective signal segments of the sound signal are determined; the spectrograms of the effective signal segments are acquired, a to-be-tested identification characteristic matrix is determined, and the to-be-tested identification characteristic matrix is used for representing sound intensity distribution of the sound signal on the time-frequency domain; similarities between the to-be-tested identification characteristic matrix and each standard identification characteristic matrix in an abnormal sound model database are calculated, and abnormal sound types of the effective signal segments are determined according to calculation results; computational complexity in an abnormal sound identification process is simplified, and detection accuracy is improved.

The invention belongs to the field of content detection of color-changed substances, and specifically relates to a substance content detection method, system and devicebased on color data analysis. According to the technical scheme, the method mainly comprises the following steps: S1, creating a standard sample color database; S2, selecting color data corresponding to a certain amount of standard samples according to a detection result accuracy demand, and printing a plurality of color blocks; S3, shooting and frame the to-be-detected samples and the plurality of color blocks in onesame horizontal plane; S4, recognizing the color blocks inthe color the most close to the color data of the to-be-detected samples; and S5, finding out the substance content corresponding to the color blocks from the standard sample color database, and then defining to be the substance content in theto-be-detected sample. With the adoption of the method, the problems that a colourimetric card is used for visually comparing the color in case of little color difference, subjective factors highly influence the result, and the visual color difference comparing capability is limited, can be solved; the detection process is objective; the detecting accuracy is high; the field detection is convenient; the detection cost is low; and the result is accurate and clear.

The invention discloses an underwater stand pipe vortex induced vibration inhibiter adopting a rotatable cowling, belonging to the technical field of ocean stand pipe facility laying. In the invention, the rotatable cowling capable of changing own direction along with the current flow direction is installed on an underwater stand pipe and comprises a pair of rotating modules, a cowling fixing pad and a cowling. The inhibiter is characterized in that the front part of the cowling is round, the rear part of the cowling is pointed, the surface of the cowling is smooth, and the shape of the cowling is similar to a water drop. The circular arc part of the cowling is coaxial to the stand pipe and is connected with a main pipe by the rotating module which is convenient to install and disassemble to cause the circular arc part to freely rotate around the stand pipe. A small-density buoyant material is added in the hollow part of the cowling, and the structural deformation and pivoting friction resistance brought by the asymmetric gravity of the cowling can be eliminated. Because of effectively inhibiting vortex induced vibration, the underwater stand pipe vortex induced vibration inhibiter can improve the fatigue resistance of the underwater stand pipe, thus greatly lowering the engineering cost. Meanwhile, the inhibiter overcomes limitation on incoming flow directions by various vortex induced vibration inhibiters, and has high application value in the environments with frequently changed flow directions of oceans, rivers and the like.

The invention discloses a high-abrasion-resistance ceramic glazed brick and a manufacturing method thereof. The ceramic brick surface is provided with a glaze layer; the glaze layer of the high-abrasion-resistance ceramic glazed brick is characterized in that a cordierite crystal is taken as a main crystal phase; the glaze layer contains 10 to 60 percent of the cordierite crystal; the glaze layer is mainly prepared from the following chemical components in percent by weight: 50 to 65 percent of SiO2, 10 to 25 percent of Al2O3, 6 to 15 percent of MgO, 2 to 10 percent of CaO, 0 to 2 percent of Li2O, 0 to 4 percent of Na2O, 0 to 4 percent of K2O, 0 to 3 percent of ZnO, 0 to 3 percent of BaO, 0 to 2 percent of SrO, 0 to 2 percent of B2O3 and 0 to 2 percent of TiO2. The prepared glazed layer containing the cordierite crystal has the advantages of remarkably improving the hardness and abrasion resistance of a glaze surface, and enlarging the application range of the glazed brick under the condition of keeping the transparency of the glaze layer.

The invention relates to a method for realizing shaft and hole mating with high accuracy by low-accuracy robot, comprising following steps. (1) bowl constraint field is found in high dimension space of six-dimension space of shaft and hole; (2) positive output signal of the bowl constraint field and the robot without any feedback is used to make the shaft and hole system arrives the state corresponding with the presetting special point of bowl constraint field so as to decrease errors of position and angle; (3) the field formed by the special point in new space is original field to find the new bowl constraint so as to eliminate errors of position and angle furthermore until the shaft inserts into the hole.

The invention discloses an automatic cleaning device for an evaporating pot heat exchange tube. The automatic cleaning device comprises a center column, a sliding fame driving mechanism, a machine frame portion, a machine frame wheel portion, a machine frame driving portion, a water pipe clamping wheel mechanism and a water pipe conveying mechanism; one end of the machine frame portion is hinged to the center column, the other end of the machine frame portion is connected with the machine frame wheel portion in a positioned mode, and the length of the machine frame portion can be changed by adding a connection machine frame portion; the machine frame driving mechanism is arranged a front machine frame of the machine frame portion and drives the machine frame portion to rotate around the center column, the sliding frame driving mechanism drives the water pipe clamping mechanism to slide on the side face of the machine frame portion, and the heat exchange tube is positioned in a polar coordinate mode; the water pipe conveying mechanism and the water pipe clamping mechanism are combined to achieving conveying and retracting of a water pipe. The automatic cleaning device for the evaporating pot heat exchange tube can achieve automatic cleaning, the length of the machine frame portion can be enlarged according to the size of an evaporating pot, no cleaning dead space exist in a cleaning range, and the phenomenon that machine frame wheels are blocked because of walking on the surface of an irregular evaporating pot can be avoided.

The invention provides a bi-camera scanner gun and a scanning method thereof. The bi-camera scanner gun includes a housing, a near-focus camera and a far-focus camera. The housing is provided with a scanning window thereon. The near-focus camera and the far-focus camera are both installed on the scanning window. The method includes the following steps: the near-focus camera acquiring a first bar code image, and at the same time the far-focus camera acquiring a second bar code image; decoding the first bar code image and/or the second bar code image. The bar code images are acquired by the near-focus camera and the far-focus camera having different depths of focus, and the bar code images are decoded, such that the usage of the scanner gun is expanded, the time for manual adjustment of the scanner gun is shortened, the time for code scanning of the scanner gun is reduced, and the sensitivity of code scanning is increased.

A detection method for identifying material static mechanical property parameters in different areas of solder joints comprises the following steps of: (1) preparing a solder joint sample used for a hardness test; (2) selecting a plurality of points in the whole solder joint area along the direction of the solder joint diameter to carry out the hardness test, and regionalizing according to hardness number; (3) carrying out an indentation test in the regionalized areas to obtain a load-depth curve of different test points; (4) establishing a finite element model of the indentation test and verifying; (5) forming optimization mathematical models in different areas of the solder joints according to a simulation result of the finite element method numerical model in the indentation test and acorresponding experimental result; (6) calculating the static mechanical property parameters in different areas of the solder joints by the combination of genetic algorithm. The detection method provided by the invention has a simple principle, is convenient to operate, and can be used to determine local mechanical property parameters of a material with millimeter even micrometer dimensions and expand the application range of the indentation test.

The invention discloses a staggered spoke type stretchable tool for friction stir welding. The staggered spoke type stretchable tool comprises a bearing, a bearing sleeve, a first supporting ring, a second supporting ring, a third supporting ring and a plurality of supporting plates, the bearing is used for connecting the spoke type tool with a cross-shaped operation machine type dislodgement machine, the bearing sleeve is rotationally arranged on the bearing in a sleeving manner, the first supporting ring is annular, an inner ring fixing sleeve is arranged on the bearing sleeve and can rotatealong with the bearing sleeve, the multiple first air cylinder assemblies are arranged on the outer ring of the first supporting ring and distributed on the outer side of the first supporting ring ina circumferential array equal-interval manner, the second supporting ring is annular, is concentric with the first supporting ring and is arranged on the outer side of the first supporting ring, a plurality of round holes are formed in the second supporting ring, air cylinders can penetrate the round holes, the supporting plates are arc-shaped plates, and the first air cylinder assemblies can bedetached to be far away from one end of the third supporting ring. The invention further discloses an adjusting method of the staggered spoke type stretchable tool for friction stir welding.

The invention discloses a solution method of an address conflict in a point-to-network tunnel mode. In the solution method, a client side starts to launch a tunnel establishing request to an SSLVPN (Secure Sockets Layer/Virtual Private Network); the client side launches an IP address request to the SSLVPN; the SSLVPN generates a shadow IP, and the shadow IP is associated with an original IP address through Hashing; the SSLVPN sends the shadow IP to the client side; the client side judges whether the shadow IP has a conflict with the local network environment or not; if the conflict exists, the SSLVPN regenerates a shadow IP; and if the conflict does not exist, then the shadow IP is used as the IP address of a virtual network card. The solution method can be used for successfully solving the problem that the virtual network card of the client side is required to use a specific IP address in certain circumstances and the IP address of the virtual network card allocated by the SSLVPN has a conflict with the specific IP address. Thus, a point-to-network tunnel can meet various network topology requirements, and the use range of the application is widened.

The invention relates to a fire box hidden door structure which comprises a U-type rotating shaft transmission device, two sector tri-petal type hinge devices and hyperbolic door guiding and limiting devices. The two sector tri-petal type hinge devices are arranged on the two sides of the U-type rotating shaft transmission device through a rotating shaft respectively to achieve eccentric moving and hyperbolic opening of a door. The hyperbolic door guiding and limiting devices comprise two wedge-shaped fixing blocks, wherein one hyperbolic door guiding and limiting device is fixed between the fire box hidden door and the rotating shaft, the hyperbolic door guiding and limiting device stops rotating when the door is opened to 180 degrees for the second time, and the other hyperbolic door guiding and limiting device is fixed inside the U-type rotating shaft transmission device to control a door leaf not to collide with an outer fade facing when the door leaf is opened for the first time. The fire box hidden door structure widens the applied range of a fire box, eccentric moving and hyperbolic opening are achieved, and thus the door leaf can be opened to 180 degrees.

The invention relates to a material picking mechanism of an injection molding product feeder, and particularly relates to a material picking mechanism of an injection molding product feeder. The material picking mechanism of the injection molding product feeder comprises a translation device, a lifting device and material picking devices, wherein the translation device has a horizontal moving function; the lifting device has an up-down lifting function; the material picking devices have a material picking function; the material picking devices are connected by a plurality of material picking tongs through an adjusting connecting plate to form a group and is installed on a linear guide rail; one ends of the material picking tongs which are combined into a group are positioned, and the other ends of the material picking tongs are dragged by a translation air cylinder to perform contraction and stretching motions; the material picking devices can transfer materials automatically under the drive of the translation device and the lifting device. According to the invention, the problem that injection molding products can not be well linked with a follow-up material dividing mechanism after being completely taken out of a mold and temporally stored on a receiving platform is solved, and the products orderly arranged on the feeder can be automatically and efficiently transferred.

The invention discloses a solvent-free bi-component polyurethane adhesive with high initial viscosity. The adhesive comprises a component A and a component B, wherein the component A is a blocked isocyanate group compound, the component B is a polyhydroxy compound, and the component A and the component B are mixed according to the molar ratio of NCO:OH of 1.1-1.5 so as to obtain the solvent-free polyurethane adhesive with high initial viscosity. The component A, namely the blocked isocyanate group compound, is formed by reaction of polyisocyanate and the polyhydroxy compound. The component B, namely the polyhydroxy compound, is composed of polyether polyol, or composed of polyether polyol and vegetable oil polyol, or composed of polyether polyol, vegetable oil polyol and tackifying resin. The viscosity of the solvent-free compound adhesive is reduced, and certain initial viscosity can be ensured. Particularly, good initial viscosity can be achieved by only applying a thin adhesive layer.

The invention relates to a preparation method for the chiral stationary phase of a bonding-affinity compound polysaccharide. The invention is suitable for the separation and preparation of a chiral enantiomer by liquid chromatography, enlarges the using range of a moving phase and overcomes the defect of poor chiral splitting capacity of a bonding stationary phase. The preparation method is mainly characterized by: 1) chemically bonding a polysaccharide derivatvie I on the stroma of the chiral stationary phase to obtain the bonding stationary phase; 2) coating a polysaccharide derivatvie II on the bonding stationary phase to obtain the chiral stationary phase of a bonding-affinity compound polysaccharide.

The invention discloses a fabric defect detection method based on optical threshold segmentation. The method comprises two parts, i.e., an optimal threshold selection part and an image segmentation part. The optimal threshold selection part specifically comprises the following steps: step 1, randomly selecting a gray value as a segmentation threshold, step 2, according to the threshold, dividing an image into two types, step 3, solving the gray scale total mean value of the gray scale mean value of each type of image and the image, step 4, solving a between-class variance and an inter-class variance of the two types, step 5, calculating a weight, and step 6, calculating an optimal segmentation threshold according to a discrimination formula. The image segmentation part is carried out on the basis of the optimal threshold selection part. The gray value of each pixel point in the image is compared to the optimal threshold, 225 is taken as a gray value which is greater than the threshold, and 0 is taken as a gray value which is smaller than the threshold, such that the image can be divided into a background part and an object part. According to the invention, during segmentation threshold selection, the between-class variance of pixels is considered, an inter-class distance is also introduced, and the weight is employed for reinforcement, so that the calculated threshold is more accurate, the defects of a fabric image can be accurately detected, and the segmentation effect of a complex texture image is improved.

The invention discloses a laser marking method based on CCD navigation positioning. The laser marking method comprises the steps that (1) a CCD camera and an object carrying platform are corrected, and therefore a pixel coordinate of the CCD camera is related to a coordinate system of the object carrying platform; (2) the CCD camera and an oscillating mirror are corrected, and therefore the position of the CCD camera is related to the position of the oscillating mirror; and (3) navigation of a marking sample positioning point and a marking position point is carried out, and a positioning marking information pattern of a marking sample is generated. The CCD camera, the object carrying platform and the oscillating mirror are corrected, and therefore the pixel coordinate of the CCD camera and the coordinate system of the object carrying platform are related, and the CCD camera and the position of the oscillating mirror are related; then navigation of the marking sample positioning point and the marking position point is carried out, the positioning marking information pattern of the marking sample is generated, and therefore the positioning marking information pattern achieves accurate positioning marking under the condition that no sample CAD pattern positioning marking information exist due to the similar sample positioning marking information CAD patterns, and the using scope of an existing CAD pattern machine is improved.

The invention relates to a floating impeller serial hydraulic turbine which is characterized by comprising a floating body (1), a variable-speed gear box (2), a generator (3), a bevel gear box (4), a transmission shaft (5) and an impeller group (6). The impeller group (6) comprises a plurality of shafts (61) which are connected with each other in series, wherein each shaft (61) is provided with aplurality of impellers (62); one end of the transmission shaft (5) is connected with the shafts (61) which are arranged on one end of the impeller group (6) through a universal coupling, and the other end is connected with the input shaft (41) of the bevel gear box (4); the input shaft (41) of the bevel gear box (4) is connected with a vertical output shaft (42) through a bevel gear (7a); the vertical output shaft (42) is connected with the low-speed shaft of the variable-speed gear box (2) through the bevel gear (7b); and the high-speed shaft (22) of the variable-speed gear box (2) is connected with the input shaft of a motor (3). The invention has the advantages of high reliability, long service life and wide application range.

The invention relates to a composite grinding method of mechanical reciprocation and ultrasonic vibration. The superposition method of the mechanical reciprocation vibration and the ultrasonic vibration is adopted in the grinding procedure to drive the identical grinding head to grind the surface of a processed work piece, wherein, the mechanical reciprocation vibration and the ultrasonic vibration are superposed according the following motion parameters: the mechanical reciprocation vibration direction and the ultrasonic vibration direction are coaxially superposed, or the mechanical reciprocation vibration direction and the ultrasonic vibration direction are superposed inside the plane parallel to the surface of the processed work piece with an included angle; the frequency of the mechanical reciprocation vibration is 30 Hz to 300 Hz, and the frequency of the ultrasonic vibration is 20 KHz to 50 KHz; the amplitude of the mechanical reciprocation vibration is 0.1 to 10 mm, and the amplitude of the ultrasonic vibration is 0.02 to 0.05 times of the mechanical reciprocation vibration. The grinding method solves the problem that only the polishing of the work piece with a large area can be realized by the existing mechanical reciprocation grinding polishing, and only the polishing of the surface with a small area such as a corner, a slit, a narrow side, a quirk, and a die cavity with complex shape can be realized by the ultrasonic grinding polishing, and the grinding efficiency is low.

The invention discloses coiled material coating and a preparation method thereof and particularly relates to organosilicon modified polyester coiled material finish paint and a preparation method thereof. The purpose of the invention is to provide organosilicon modified polyester coiled material finish paint and a preparation method thereof, wherein the organosilicon modified polyester coiled material finish paint product has the advantages of high drying speed, good storage stability, no layering, excellent application property and relatively low VOC and capability of reducing the environmental pollution, is lowered in manufacturing cost and can satisfy the industrial standard on product performance. The organosilicon modified polyester coiled material finish paint contains 40-60% of organosilicon modified polyester resin, 8-15% of amino resin, 10-20% of pigments, 10-20% of precipitated barium sulfate, 0.3-0.8% of a dispersion agent, 0.3-0.8% of a UV absorber, 0.4-1.0% of a blocked acid catalyst, 0.3-0.8% of a flatting agent, 0.3-0.8% of a defoaming agent and 5-15% of a solvent.

The invention belongs to the field of pharmaceutical preparations, and particularly relates to a preparation method of a water-soluble cannabidiol inclusion compound (nano capsule). The method comprises the following steps: step 1, dissolving high-purity cannabidiol solid powder in ethanol to form a solution; step 2, dissolving cyclodextrin in pure water to form a solution; step 3, uniformly mixing the solutions formed in the step 1 and the step 2, carrying out cannabidiol inclusion by using any one of an ultrasonic method, a stirring method and a high-pressure homogenization method, and performing vacuum concentration by using a rotary evaporator after the inclusion so as to remove most of solvent and moisture; and step 4, drying the materials in the step 3 to obtain the cannabidiol inclusion compound (nano capsule). The method improves the solubility of the cannabidiol in water by thousands of times so as to thoroughly solve the problem of water solubility.

The invention discloses a green tire register, and belongs to the technical field of rubber machinery. The green tire register mainly comprises a base, an outer tray, a lifting device, and an inner claw disk. The outer tray is used for supporting a tire shoulder of a green tire, and the diameter of the outer tray and the angle of inclination of the outer tray are adjustable; a telescopic mechanism is arranged on a lifting part of the lifting device; and the inner claw disk comprises a group of tire claws which are hinged with the lifting part of the lifting device, each tire claw comprises an upper bead supporting part which is positioned above the hinge point and a lower bead guiding part which is positioned below the hinge point, and the diameter of the inner claw disk can be adjusted through the telescopic mechanism. Therefore, the technical problem that the green tire is easily deformed during registering is solved. The green tire register has the advantages of convenient adjustment and convenient use, is suitable for various specifications of green tires, and is widely applied to the tire manufacturing industry.

The invention discloses antibacterial nanofibers or master batches and a preparation method thereof, including components of an antibacterial polymer resin solution and the preparation method of the antibacterial nanofibers or master batches. The antibacterial nanofibers or master batches are characterized by being formed through electrostatic spinning, melt-blowing, fibrillation and two-component compound methods on antibacterial polymer resin solution. Photosensitive molecules in the antibacterial nanofibers or the antibacterial master batches are antibacterial, do not generate a dissolution phenomenon, and are high in efficiency, wide in spectrum and antibacterial; the high temperature resistance of an organic antibacterial agent material is effectively provided; and the application range of an antibacterial agent is further expanded.

The invention discloses a bidirectional ACDC circuit compatible with three-phase and single-phase alternating current power supply and a control method thereof. The bidirectional ACDC circuit comprises four wiring terminals, wherein the first wiring terminal, the second wiring terminal and the third wiring terminal are respectively connected to a corresponding power converter first bridge arm middle point, a corresponding power converter second bridge arm middle point and a corresponding power converter third bridge arm middle point through a corresponding first inductor L1, a corresponding second inductor L2 and a corresponding third inductor L3; the fourth wiring terminal is connected to a power converter fourth bridge arm middle point; the four power converter bridge arms are in parallel connection and further are in parallel connection with a bus capacitor C4. The bidirectional ACDC circuit further comprises a first main switch device connected between the first wiring terminal andthe first inductor L1, a second main switch device connected between the second wiring terminal and the second inductor L2 and a third main switch device connected between the third wiring terminal and the third inductor L3. The bidirectional ACDC circuit disclosed by the invention can achieve a single-phase and three-phase alternating current power supply compatibility effect, can effectively expand a circuit use range, has convenience for a user to use and reduces cost.

The invention relates to a vibration isolation and buffer device for machine-born equipment, in particular to a totally-closed rigidity adjustable type vibration isolator, which comprises a casing, an installation core shaft, a protective rubber cover, an upper rubber ring, a spherical vibration isolation part and a lower rubber ring. The casing is of a sealed structure, the top of the casing is provided with an installation hole where the installation core shaft is arranged, and the spherical vibration isolation part is arranged in the sealed casing and is connected with the bottom of the installation core shaft together. The upper rubber ring is sleeved at the upper portion of a damp rubber ball, and the lower rubber ring is sleeved at the lower portion of the damp rubber ball which is sealed in the casing. The totally-closed rigidity adjustable type vibration isolator adopts a totally-closed structure to have small environment influence, utilizes a combination structure combining the spherical surface and the cylindrical surface to improve vibration isolation and retarding effects, utilizes the structures of the upper rubber ring and the lower rubber ring to limit the swinging of the head of the installation core shaft and improve using safety, and can be suitable for different frequency ranges by rotating the upper cover to adjust the rigidity of the vibration isolator.

The invention discloses a power-assisted manipulator and belongs to the field of mechanical engineering. The problems that the carrying speed and strength of manipulators cannot be controlled manually, and workpieces with high mass and different sizes are difficult to dismount and mount are solved. The power-assisted manipulator comprises an arm provided with a first locking part, an adapter partwhich is hinged to the arm through an X-direction hinge shaft so that the arm can rotate around the X-direction hinge shaft, a locking mechanism detachably fixed to the adapter part, a connecting partwhich is hinged to the adapter part through a Z-direction hinge shaft so that the adapter and the arm which are connected fixedly can rotate around the Z-direction hinge shaft simultaneously, and a lifting driving mechanism which is connected with the connecting part and used for driving the connecting part, the adapter part and the arm to move in the Z direction, wherein the arm rotate around the X-direction hinge shaft to attach to the adapter part, the locking mechanism is locked with the first locking part so that the arm and the adapter part can be fixedly connected. The manipulator is simple in structure, convenient to operate and powerful in function, and the effect of carrying weights like light objects is achieved.

This invention relates to a various terminals supported universal VoIP gateway and communication method between gateway and terminal. Said gateway includes share memory, network processor, external interface and digital signal processor, wherein the share memory for temporary storing speech data by which network processor and digital signal processor exchanging data, network processor for network accessing and routing and having plurality of interfaces by which realizing data communication between gateway and external part, digital signal processor converting speech coding/decoding mode. Said invention has advantages of supporting all current speech coding/decoding modes, simplifying terminal design and reducing terminal cost.

The invention discloses a universal formula search method. The method comprises the following steps of establishing a universal formula search engine; running a plurality of network crawler processes by a searcher; extracting a mathematic formula in a document from an original webpage database by an indexer; performing mathematic formula query by a querier through a mathematic formula index and mathematic symbol dictionary database; and returning the document containing the queried mathematic formula in the original webpage database to a user by the querier and displaying the document in a search completion interface. The method has the beneficial effects that a quick and accurate mathematic formula search scheme is provided for scientific research personnel and teaching staffs, a theoretical support is provided for scientific research, and extensive and accurate material search schemes are provided for teaching and science popularization; and dedicated teaching formula search interfaces are provided for various document databases, the application and business ranges of the document databases are expanded, and payment download interfaces are provided for increasing the benefits of the document databases.

The invention discloses a control method of a hot rolling width of a wedge-shaped slab. The control method is used in hot rolling of rough mills and used for controlling the hot rolling width of the wedge-shaped slab. The control method includes the following steps that firstly, whether an incoming slab is a wedge-shaped slab or not is judged according to the width difference of the head and the tail of the incoming slab which is to enter a rough mill to undergo rough rolling processing; secondly, when the incoming slab is determined to be the wedge-shaped slab, the type of the wedge-shaped slab is determined according to the width difference of the head and the tail; thirdly, width control is performed on wedge-shaped slabs in multiple racks in the rough mill which the wedge-shaped slab enters according to the wedge-shaped slab type which is determined in the second step. The control method of the hot rolling width of the wedge-shaped slab automatically controls widths of the wedge-shaped slabs which have the abnormal widths in the full length direction in the rough rolling process of a hot rolling mill.