135results about How to "Improve discreteness" patented technology

The invention discloses a laser scanning method for laser melting in a selected area. The laser scanning method comprises the following steps: dividing a workpiece area into a plurality of latticed regular triangles with side length being 1mm-10mm and a plurality of irregular figures at borders according to the cross section information of a workpiece, taking a gap G between the adjacent figures from -1mm to 1mm; scanning the irregular figures at the borders as the zoning regular triangles and adopting an equidistant scanning line for successively finishing the zoning figure scanning; according to the zoning direction, adopting the equidistant scanning line for successively finishing the gap scanning; scanning along a practical outline of the workpiece or the outline deviating within 1mm inward or outward to the practical outline of the workpiece according to the requirement, or repeatedly scanning along a plurality of outlines deviating from the practical outline of the workpiece within 1mm, thereby finishing the cross section canning for the workpiece. According to the scanning method provided by the invention, the scattering effect of residual stress in the workpiece during a laser scanning process is improved, the laser scanning direction during the scanning process does not need to be repeatedly changed, the scanning efficiency is high, the technique control is simple, and the compactness and the precision of the workpiece are ensured.

The invention discloses a making method of nylon cover membrane metallic powder material, first heating mixture of nylon resin, solvent, metallic powder and antioxidant in the closing container, dissolving the nylon in the solvent, then gradually cooling, making the nylon as nucleus of metal granular, and gradually crystaling and coating on the surface of metal granular, by vacuum drying, ball milling, screening to select powder distributing by certain particle diameter namely the nylon cover membrane metallic powder material. The material made by the invention has superior sintering performance and good flow characteristics, without containing impurity difficult to remove by after-treatment process. The material has less nylon content, but the SLS original blank has higher accuracy and intensity. Thereby the invention is adapted to SLS indirect making metalwork.

The invention provides a crawler seed obtaining method and equipment and a crawler crawling method and equipment. The crawler seed obtaining method comprises the following steps of: establishing a dynamic page request according to the preset search term dictionary and the URL (uniform resource locator) characteristics of a target navigation website; sending the dynamic page request to a server of the target navigation website; according to the preset extraction policy, extracting the target URL from the search result page returned by the server according to the dynamic page request, wherein the target URL is the main domain name address of the URL in the search result page; and performing unique processing on the target URL to obtain the unique target URL, wherein the unique target URL is used as a crawler seed. Through the technical scheme of the invention, abundant crawler seeds with great dispersion can be provided, and thus the time for forming the mainstream URL is shortened, the coverage of the mainstream URL is improved, and the time cost for crawling of the crawler system is reduced.

The invention discloses an aging treatment process of an Al-Zn-Mg-Cu aluminum alloy, which comprises: keeping an aging temperature of 120 DEG C for 24 hours and a regression temperature of 170 to 200 DEG C for 5 to 30 minutes; after the regression, quenching the alloy or cooling the alloy with furnace to an reaging temperature and keeping the reaging temperature of 120 DEG C for 24 hours; and after primary regression and reaging, performing one or more times of regression and reaging. Aiming at the drawbacks of the traditional Al-Zn-Mg-Cu alloy peak aging, overaging and primary regression and reaging heat treatment technology, the invention provides a novel aging treatment method on the basis of a discovery that in the secondary regression after the primary regression and reaging of the Al-Zn-Mg-Cu alloy, a grain boundary precipitate phase can continue to grow and disperse while the intra-grain precipitate phase can dissolve in a matrix again to ensure the alloy can precipitate till a peak aging state in consequent reaging. The treatment method can improve the corrosion resistance of the Al-Zn-Mg-Cu alloy considerably on the premise of retaining the strength of the Al-Zn-Mg-Cu alloy.

The invention discloses a method for separating and culturing primary chicken hepatocytes. According to the method, EGTA (Ethylene Glycol Tetraacetic Acid) with low hepatotoxicity is added into a perfusate A to loosen the junction between hepatocytes, so that the dispersion degree of the to-be-separated hepatocytes is increased; double resistance is added into the perfusate A, a perfusate B and D-Hanks flushing fluid, so that the pollution is further prevented; and circulating perfusion digestion is adopted during digestion perfusion, so that the perfusion cost is greatly reduced. A serum-free cultural method of the chicken hepatocytes is established; compared with a traditional serum cultural method, the method disclosed by the invention has the same effect on the aspects of cell quantity, activity, function and the like, so that the problems caused by the existence of serum are solved and a foundation is laid for the substance metabolism study and biological product preparation on the basis of the chicken hepatocyte culture.

The invention relates to a heating equipment which an be used in carbon fibre graphitization process and improvement on its working process. The improved heating equipment is a microwave thermal reaction equipment formed from microwave generator, power matching device, coiled waveguide tube with radial through-hole water load and quartz tube thermal reactor placed in the through-hole. Said invention adopts microwave thermal reaction equipment to implement non-contact heating of carbon fibre, and utilizes quartz tube thermal reator into which high-pure argn gas can be charged so as to ensure graphitization process condition.

The invention discloses an encryption method suitable for multimedia transmission and service characteristics. The method comprises the steps that encryption and multimedia coding and decoding processes are integrated, a certain proportion of data instead of all the multimedia data are encrypted, the encrypted data have great influence on multimedia decoding and carry abundant information, and thus processing loads of a system are reduced; in the encryption process, a safe random number generation function Rand () is adopted for enhancing protection, and a base layer is divided into blocks at random, so that the safety of a combination cryptosystem is enhanced; encryption algorithms are extracted from an encryption algorithm library at random through a mapping algorithm, and the encryption algorithms encrypt the base layer block by block. As a code breaker does not know which algorithm is adopted on specific information, the various encryption algorithms are combined to play a role, thus, the code breaker cannot decode, and the discreteness and safety of the encrypted information are enhanced. The encryption method has the advantages of being rapid and efficient, and has higher practicability and better application prospects.

The invention discloses an inner cycle collision mixed type soil repair device which comprises a processing box, wherein the processing box is a cylindrical barrel, wherein a lifting barrel is arranged at the middle position of the upper end of the processing box in a penetrating manner, a rotating bearing matched with the lifting barrel is arranged at the upper end of the processing box, a supporting ring is arranged in the bottom of the processing box, a material collecting box is arranged in the middle position of the supporting ring, the lower end of the lifting barrel stretches into the material colleting groove, and a lifting shaft is arranged in the axis position in the lifting barrel. By crushing materials circumferentially and screening the materials through a filter barrel, the sizes of the materials are qualified when the materials are repaired, so that the materials are in full contact with a repair solution in the later period; the materials then upwell along the lifting barrel through lifting blades and collide with a material spraying cone which sprays the repair solution, so that the dispersion degree of the materials is enhanced; the materials are in contact with the repair solution sprayed from the nozzle conveniently, so that the repair effect is improved and the practicality is high.

The invention, which belongs to the technical field of the wind tunnel testing, relates to a force measurement device of a stable parachute of a hose pipe of a pod of an oiling machine. On the basis of the existing rod type scale technology and bent blade type tail boom device technology, a stable parachute joint, a bent blade type support bar, and a rod type balance transfer bolt are designed andare used for forming a force measurement device based on an aerodynamic environment in a real flight state of an oiling pod hose pipe connector stable parachute. The force measurement device has thefollowing advantages: the automation degree and the control precision are high; the technical staff is able to carry out remote control precisely and conveniently; and the test efficiency and safety are improved. With the good support mode, the data deviation caused by the dead load influence of the stable parachute is eliminated effectively; the support interference is reduced; the aerodynamic data of the stable parachute are tested precisely; and the practicability is high. The force measurement device is easy to promote and apply in tunnel testing and has the great practical value.

The invention provides a series capacitor compensation power transmission line distance protection method. The method comprises the following steps that: the voltage and current of a power transmission line can be acquired in a real-time manner, and the voltage sampling value and the current sampling value of a power transmission line protection installation position (circuit breaker) at each sampling time point can be obtained; and at the same time, power transmission line fault detection is performed, if a fault occurs on the power transmission line, fault location is performed so as to judge the position of the fault point. With the series capacitor compensation power transmission line distance protection method of the invention adopted, over tripping caused by series compensation capacitor short-circuit faults occurring in a forward direction can be avoided, and incorrect tripping can be also avoided due to series compensation capacitor short-circuit fault protection in a reverse direction, and therefore, the influence of series compensation capacitors on distance protection can be eliminated. According to the series capacitor compensation power transmission line distance protection method of the invention, a pi-shaped equivalent circuit of a series compensation line forward-direction fault is adopted; an iterative algorithm is used for distance measurement; and the position of the fault point with respect to the series compensation capacitors can be judged according to the discrete degree of the distance measurement. Thus, with the series capacitor compensation power transmission line distance protection method adopted, the over tripping and incorrect tripping of the distance protection can be reliably prevented, and the sensitivity of the protection can be improved.

The invention relates to a digitalized electronic speed regulator. The digitalized electronic speed regulator comprises a rotating speed controller, a rotating speed sensor, an actuator and cables, wherein the rotating speed controller sets the desired rotating speed, the rotating speed sensor collects the practical rotating speed, the actuator regulates the practical rotating speed, and the cables are connected with the rotating speed controller, the rotating speed sensor and the actuator. The rotating speed controller further comprises a rotating speed setting potentiometer, a comparator, a rotating speed deviation device, a converter and a PID regulator, wherein the rotating speed setting potentiometer sets the desired rotating speed, the comparator compares the desired rotating speed with the practical rotating speed, the rotating speed deviation device calculates rotating speed deviation value of the desired rotating speed and the practical rotating speed, the converter converts the practical rotating speed into a digital square wave, and the PID regulator converts the rotating speed deviation value into PWM. The invention further provides an engine speed regulation method. The digitalized electronic speed regulator and the engine speed regulation method have the advantages that a power system is safer in operation and running, the dispersion performance is better, and the stability is better.

The invention belongs to the field of wireless communication, and relates to a true random number generator applicable to a wireless communication system. Through improvement of the structure of a traditional true random number generator, the radio frequency receiving channel of the wireless communication system is taken as a true random number source and an extraction circuit, through adoption of a post processing circuit, the performance of true random numbers is ensured, and the traditional true random number generator provided by the invention has relatively high application value in aspects such as communication and information security. The specific structure of the traditional true random number generator is that the on-chip radio frequency receiving channel is multiplexed as the true random number source, noise signals of a reference source are obtained for amplification and processing, noises are quantified by an on-chip AD, the random numbers are extracted by an oscillator through an oscillation sampling method, and after the random numbers are processed by the post processing circuit, a true random number sequence is output. Compared with the prior art, an external noise source chip or an on-chi physical noise source is unnecessary. The cost and complexity of the system are reduced; the structure of the extraction circuit is simplified; and the discreteness and entropy of the random numbers are effectively improved.

The invention discloses an efficient drying device for biofuels. The efficient drying device comprises a base and a drying box, wherein the drying box is arranged above the base; the drying box is a cylindrical barrel; a collection box is arranged at the lower end of the drying box; the left side surface of the collection box is a guide oblique surface; supporting legs are arranged among the drying box, the collection box and the base; a discharge baffle plate is arranged at the bottom of the collection box; a lifting barrel is embedded on the upper end face of the collection box where the discharge baffle plate is positioned; a fixed rod is arranged between the left upper side of the lifting barrel and the drying box; a screw conveyer is arranged inside the lifting barrel; a material return pipeline is arranged between the left upper side of the lifting barrel and the top of the drying box; a feeding pipe is arranged on the upper end face of the lifting barrel; a feed hopper is arranged in the middle position of the top of the drying box; stirring shafts are horizontally arranged inside the drying box under the feed hopper; a plurality of stirring rods are arranged on the stirring shafts; and the left ends of the stirring shafts penetrate through the left side wall of the drying box, and are connected with driving motors. According to the efficient drying device, the structure is simple and reasonable, circular drying of materials is achieved, the drying effect is good, and the practicability is high.

The invention discloses a personalized test question recommendation method based on a knowledge graph, and the method specifically comprises the steps: constructing the knowledge graph, crawling test questions in a corresponding field in a network as a test question bank, carrying out the manual analysis of knowledge points inspected by the test questions in the test question bank, enabling the test questions to correspond to the knowledge graph, and enabling the examination knowledge points to correspond to the test questions; mapping a personalized knowledge sub-graph of each learner according to the learning target and the knowledge graph of the learner; obtaining the current cognitive level of the knowledge points of the learner; calculating the intimacy of the knowledge points; and realizing personalized test question recommendation based on the cognitive level of the learner on the target knowledge point and the intimacy of the knowledge point. According to the personalized test question recommendation method based on the knowledge graph, the problem that the relationship between knowledge points corresponding to recommended test questions cannot be considered in the prior art is solved.

The invention discloses a bullet screen forbidding system and a bullet screen forbidding method for live video websites, and relates to the field of bullet screen type live videos. The bullet screen forbidding system comprises a forbidden-post recording module, a main remote service module, an authority management writing module, a plurality of authority reading modules and a plurality of auxiliary remote service modules. The bullet screen forbidding method includes that a user posts an illegal bullet screen, an administrator sends a post forbidding request to the authority management writing module, and the authority management writing module records a corresponding post forbidding state in the main remote service module according to an operation type value in the post forbidding request and synchronizes the post forbidding state to all the auxiliary remote service modules; the user logins in a room to send a query request to an authority unit in each authority reading module, selects the second auxiliary remote service module to send the query request and acquires the queried post forbidding state, wherein users who are forbidden to post bullet screens cannot post the bullet screens at corresponding positions within post-forbidding periods. The bullet screen forbidding system and the bullet screen forbidding method have the advantages that server workload is reduced, servers are added directly through transverse extension to meet QPS (query per second), and new server development is not needed.

The embodiment of the invention discloses an image processing method and system, and a server. The method comprises the following steps of: obtaining a face image to be processed; inputting the face image into a preset convolutional neural network model provided with a loss function, and performing parameter regularization processing of the loss function to allow the convolutional neural network model to perform directed screening of between-class distances after image classification is enlarged; and obtaining classification data output by the convolutional neural network model, and performingcontent understanding of the face image according to the classification data. The parameter regularization processing is added on the basis of the loss function of the convolutional neural network model to allow each class extracted by the convolutional neural network model to be close to the weight of each class itself in directions, and therefore, it is ensured that the extracted face image features can stay the same as much as possible in a cosine space, and intra-class features of the face image features have better convergence.

The invention provides an impedance matching circuit board, an antenna and a terminal. The impedance matching circuit board comprises a microstrip line. The microstrip line is in short circuit connection with an assigned member in a lumped element circuit or is in an open circuit connection with the periphery of the assigned member for performing impedance matching with the assigned member. The impedance value of the microstrip line is determined by a working frequency of an electromagnetic signal. A common welding plate is arranged in the lumped element circuit and the common welding plate isused for welding pins of multiple assigned members. The impedance matching circuit board, the antenna and the terminal improve a matching degree of the impedance circuit and element discretness.

The invention belongs to the technical field of energy storage control of a power system, and especially relates to an energy storage voltage-sharing charge and discharge control system for a super capacitor set and a charged state estimation method. The system comprises a microprocessor control module, a super capacitor set measuring module, a switch driving module, a super capacitor switch array module, a super capacitor array module, a man-machine interaction module, a DC charging power module and a SOC module. The method comprises the steps of obtaining an observed value through an observation equation based on state prediction and minimum mean squared error estimation, and correcting real state variables. Information is obtained through sensors based on probability theory and circuit theory, and the optimal working state of an entire super capacitor set energy storage system is ensured through the control strategy and SOC state estimation, so that the system charges and discharges safely. Compared with conventional super capacitor array charging and discharging technology, the system is simple, effective, rapid and energy-saving. Reference for maintaining super capacitor arrays is also provided.

The invention relates to a heating equipment for preliminary heat treatment in oxidizing and carbonizing fibre and its working process. The described heating equipment is a mcirowave thermal reaction equipment formed from microwave generator, power matching device, coiled waveguide tube with radial through-hole, water load and quartz tube thermal reactor placed in the through-hole. Said invention adopts microwave method, and utilizes quartz tube thermal reactor into which the high-pure nitrogen gas can be charged so as to ensure carbonization process condition.

A fluorescence analysis reagent kit for detecting homocysteine in blood is disclosed. It uses a novel internal standard thiohydroxy acetic acid for quantity control and the chromatographic peaks of said internal standard and homocysteine can be clearly separated from each other. Its advantages are less specimen, high correctness, high speed, and low cost.

The invention discloses a dual spectrum technology based leaf and stalk separating and cutting quality detection device and detection method. The detection device comprises a spreading device (1), a paving machine (2) arranged under the spreading device (1), an X ray detector (3) arranged under the paving machine (2), a visible light detector (4) arranged under the outlet of the X ray detector (3), a receiving device (6), a frame (5), and a control cabinet (7). The receiving device (6), the frame (5), and the control cabinet (7) are arranged under the outlet of the visible light detector (4).By adopting a visible light and X ray imaging technology and corresponding image algorithm, the tobacco leaf area, tobacco stalk area, and tobacco stalk length can be obtained; the leaves and stalks in a same image do not need to be separated, and the identification accuracy of image detection is improved. The leaf structure and long stalk rate can be detected, the stalk containing rate of leavesand leaf containing rate of stalks can be detected, the stalk density and leaf density are not needed during the index calculation process, and the leaf cutting quality indexes can be automatically calculated out.

The invention provides a cooling device of a steel plate. The cooling device of the steel plate at least comprises a plurality of U-shaped upper collecting tubes located above the steel plate and arranged along the running direction of the steel plate, eight rows of U-shaped tubular nozzles are arranged along the running direction of each U-shaped upper collecting tube in order to improve the water spray capacity of unit time. By adopting the cooling device of the steel plate, low pressure water can be utilized to cool so as to reach a cooling speed required by quenching, therefore, the cooling device and a water supply system are simplified, and the energy consumption and the cooling cost are reduced.

The invention discloses a medical osteotome for mandible plastic surgery and a preparation method thereof. The medical osteotome comprises the following material components: 0.20% to 0.55% of C, 12% to 20% of Cr, 0.2% to 0.8% of Si, 0.5% to 1.5% of Mn, 0.3% to 1.0% of Ni, 0.5% to 1.5% of Mo, 0.2% to 0.5% of N, Fe and a small amount of impurity elements. The preparation method comprises the steps of heating a roughly machined osteotome blank to 1000 DEG C to 1050 DEG C for austenitizing; then, carrying out cryogenic treatment on the osteotome at the temperature of minus 60 DEG C to minus 130 DEG C; then, carrying out tempering on the osteotome at the temperature of 150 DEG C to 200 DEG C two times, wherein tempering is carried out for not less than 2 hours each time; then, air cooling the osteotome to the room temperature; and carrying out finish machining treatment on the osteotome blank to obtain a final finished product. The osteotome is applicable to mandible plastic surgery and has relatively high hardness and toughness, the edge of the osteotome is not liable to curl during the surgery, the service life of the osteotome is greatly prolonged, and safety and reliability of the surgery are guaranteed.

The invention discloses a face recognition method based on LDA (Linear Discriminant Analysis) subspace learning, which is characterized in that the method comprises the following steps: obtaining and preprocessing a face image; calculating a gradient multi-scale local phase quantification (GMLPQ) feature set of the face image; screening features with identification capability to form a candidate feature subset by applying an Adaboost selector; obtaining a face feature template by applying an LDA subspace analyzer; matching the face feature template with a reestablished face feature template library and obtaining the identity information of a recognized person. Compared with the existing other face recognition technologies, the face recognition technology of the face recognition method has stronger environmental suitability, better recognition rate and misclassification rate under the conditions of blurry images (defocus, movement and the like), low resolution and various illumination (infrared light and visible light), and quick calculation speed, is particularly suitable for embedded products and can be extensively popularized and applied.

The invention relates to a method for extracting curcumin from fresh ginger. According to the method, fresh ginger raw materials are directly used without drying, an extraction process adopts wall breaking of a flash extraction device, compound enzyme enzymolysis and an ultrasonic-assisted sodium salicylate ethanol solution extraction method, a technique combined wall breaking of a flash extraction device with compound enzyme enzymolysis greatly improves extraction efficiency, most of impurities in solution can be remained in mother solution through crystallization, high-purity crystals can beacquired through filtering and washing, a HPLC (high performance liquid chromatography) detects that purity can reach 90% or more after crystallization, and the HPLC detects that the purity can reach97% or more after recrystallization.

The invention provides an oil-gas adsorption and absorption technical method. Oil gas is adsorbed and absorbed through evaporated oil gas absorption, deep adsorption and desorption of tail gas, rich absorbent desorption and concentration and high-concentration oil gas recycling. Compared with the prior art, the oil-gas adsorption and absorption technical method has the advantages that oil gas can be adsorbed and absorbed as well as desorbed and recycled at the same time; the adaptive capacity is high; the equipment utilization rate is high; the oil-gas adsorption and absorption technical method is convenient and quick; by the adoption of an automatic rotary spraying device, liquid flow at an inlet is dispersed, so that an absorbent is uniformly distributed, channeling is avoided, and poor distribution of the absorbent is eliminated; a gas inlet is immersed below the liquid level of the absorbent, so that part of the oil gas can be absorbed through a liquid stored at the bottom before the oil gas enters a filler and is absorbed, and one more absorption process increases; a baffle can lengthen a path where the gas flows, the space of an absorption tower is fully used, the performance of the absorption tower is developed, the absorption efficiency of equipment and the absorbent is improved, and the oil-gas adsorption and absorption technical method is suitable for application.

The invention discloses an EEMD-based vehicle micro-tremor signal extraction and classification method. A conventional mode identification method cannot satisfy accurate classification under the conditions of complex environments and complex motion modes. First of all, original signals are decomposed by use of EEMD, since an obvious difference exists in micro Doppler modulation between a wheeled vehicle and a tracked vehicle, for the purpose of further determining signals corresponding to each intrinsic mode function after decomposition, correlation analysis is carried out, and the effectiveness of the EEMD is also further verified. Four features, which are respectively signal intensity of the high frequency band of IMF1, discretivity between the IMFs, a fluctuation degree of the high frequency band of the IMF1, and an amplitude maximum value of the main body part of IMF2, are extracted, and finally, object classification identification is carried out by use of a support vector machine. The algorithm provided by the invention improves the vehicle identification rate and has robustness for different motion states.

The invention relates to an isolated culture method of chicken intestinal tract epithelial GammaDeltaT cells. Physical grinding is matched with a chemical enzyme process to dissociate chicken intestinal tract epithelial cells, thereby enhancing the intestinal tract cell dissociation degree, shortening the cell treatment time and ensuring the high activity of the cells; the use of the cell separation solution with the optimum density ensures the purification of the intestinal tract epithelial lymphocytes; the magnetic bead secondary antibody separation process is utilized to ensure the higher purity of the target cells; and the cell culture detects that the purity of the target cells obtained by isolated culture is up to 90%. The method overcomes the defects in the isolated culture process of the chicken intestinal tract epithelial GammaDeltaT cells, thereby laying the foundation for chicken intestinal tract epithelial GammaDeltaT cell culture and biological and immunological researches thereof.

The device discloses an imaging and remote sensing and monitoring device for pollution gas discharged by a ship by differential absorption of filtering. The device comprises a theodolite, an imaging and remote sensing and monitoring unit mounted on the theodolite, a signal processing unit, a laser range finder and a camera. The imaging and remote sensing and monitoring unit comprises an imaging lens. The light passing through the imaging lens is divided into a reflected light and a transmitted light by a beam splitter. The reflected light is imaged by a first imaging detector after passing through a first molecular bubble and a first optical filter. The transmitted light is imaged by a second imaging detector after passing through a second molecular bubble and a second optical filter. Theinvention also discloses an imaging and remote sensing and monitoring method for pollution gas discharged by the ship by the differential absorption of the filtering. The imaging and remote sensing and monitoring device and the method for pollution gas discharged by the ship by the differential absorption of the filtering has the advantages of high monitoring accuracy, small data dispersion, strong anti-interference and inhibition ability, strong environmental adaptability, high monitoring sensitivity and good visibility of results.

A new tricolor LED (light-emitting diode) pixel module in the LED luminotron display screen technology field, it is: the pixel module consists of column LED luminotron that is the tricolor namely red, green and blue, and the outer side is column convexity and the inside is 1-10 planes or curved surfaces; the tricolor LED luminotron assembleds together and forms the column pixel module; the top luminous surface of the column pixel module is the plane luminous surface, the globose concave, the globose convexity, the conical concave, the conical convexity, the multi-pyramiding concave with 3 to 15 ridges, the multi-pyramiding convexity with 3 to 15 ridges, the globose convexity with opening shuttle groove or the accidented luminotron surface. The invention can solve the chromatic polarization question.